diff --git a/vendor/google.golang.org/grpc/.travis.yml b/vendor/google.golang.org/grpc/.travis.yml
new file mode 100644
index 00000000000..b3577c7ae20
--- /dev/null
+++ b/vendor/google.golang.org/grpc/.travis.yml
@@ -0,0 +1,19 @@
+language: go
+
+go:
+  - 1.6.3
+  - 1.7
+  - 1.8
+
+go_import_path: google.golang.org/grpc
+
+before_install:
+  - go get github.com/golang/lint/golint
+  - go get -u golang.org/x/tools/cmd/goimports github.com/axw/gocov/gocov github.com/mattn/goveralls golang.org/x/tools/cmd/cover
+
+script:
+  - '! gofmt -s -d -l . 2>&1 | read'
+  - '! goimports -l . | read'
+  - '! golint ./... | grep -vE "(_mock|_string|\.pb)\.go:"'
+  - '! go tool vet -all . 2>&1 | grep -vE "constant [0-9]+ not a string in call to Errorf" | grep -vF .pb.go:' # https://github.com/golang/protobuf/issues/214
+  - make test testrace
diff --git a/vendor/google.golang.org/grpc/CONTRIBUTING.md b/vendor/google.golang.org/grpc/CONTRIBUTING.md
new file mode 100644
index 00000000000..36cd6f7581b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/CONTRIBUTING.md
@@ -0,0 +1,46 @@
+# How to contribute
+
+We definitely welcome patches and contribution to grpc! Here are some guidelines
+and information about how to do so.
+
+## Sending patches
+
+### Getting started
+
+1. Check out the code:
+
+        $ go get google.golang.org/grpc
+        $ cd $GOPATH/src/google.golang.org/grpc
+
+1. Create a fork of the grpc-go repository.
+1. Add your fork as a remote:
+
+        $ git remote add fork git@github.com:$YOURGITHUBUSERNAME/grpc-go.git
+
+1. Make changes, commit them.
+1. Run the test suite:
+
+        $ make test
+
+1. Push your changes to your fork:
+
+        $ git push fork ...
+
+1. Open a pull request.
+
+## Legal requirements
+
+In order to protect both you and ourselves, you will need to sign the
+[Contributor License Agreement](https://cla.developers.google.com/clas).
+
+## Filing Issues
+When filing an issue, make sure to answer these five questions:
+
+1. What version of Go are you using (`go version`)?
+2. What operating system and processor architecture are you using?
+3. What did you do?
+4. What did you expect to see?
+5. What did you see instead?
+
+### Contributing code
+Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
diff --git a/vendor/google.golang.org/grpc/Documentation/gomock-example.md b/vendor/google.golang.org/grpc/Documentation/gomock-example.md
new file mode 100644
index 00000000000..9f7e023d6e7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/Documentation/gomock-example.md
@@ -0,0 +1,121 @@
+# Mocking Service for gRPC
+
+[Example code](https://github.com/grpc/grpc-go/tree/master/examples/helloworld/mock)
+
+## Why?
+
+To test client-side logic without the overhead of connecting to a real server. Mocking enables users to write light-weight unit tests to check functionalities on client-side without invoking RPC calls to a server. 
+
+## Idea: Mock the client stub that connects to the server.
+
+We use Gomock to mock the client interface (in the generated code) and programmatically set its methods to expect and return pre-determined values. This enables users to write tests around the client logic and use this mocked stub while making RPC calls.
+
+## How to use Gomock?
+
+Documentation on Gomock can be found [here](https://github.com/golang/mock).
+A quick reading of the documentation should enable users to follow the code below.
+
+Consider a gRPC service based on following proto file:
+
+```proto
+//helloworld.proto
+
+package helloworld;
+
+message HelloRequest {
+    string name = 1;
+}
+
+message HelloReply {
+    string name = 1;
+}
+
+service Greeter {
+    rpc SayHello (HelloRequest) returns (HelloReply) {}
+}
+```
+
+The generated file helloworld.pb.go will have a client interface for each service defined in the proto file. This interface will have methods corresponding to each rpc inside that service.
+
+```Go
+type GreeterClient interface {
+    SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error)
+}
+```
+
+The generated code also contains a struct that implements this interface.
+
+```Go
+type greeterClient struct {
+   cc *grpc.ClientConn
+}
+func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error){
+    // ...
+    // gRPC specific code here
+    // ...
+}
+```
+
+Along with this the generated code has a method to create an instance of this struct.
+```Go
+func NewGreeterClient(cc *grpc.ClientConn) GreeterClient
+```
+
+The user code uses this function to create an instance of the struct greeterClient which then can be used to make rpc calls to the server. 
+We will mock this interface GreeterClient and use an instance of that mock to make rpc calls. These calls instead of going to server will return pre-determined values.
+
+To create a mock we’ll use [mockgen](https://github.com/golang/mock#running-mockgen).
+From the directory ``` examples/helloworld/mock/ ``` run ``` mockgen google.golang.org/grpc/examples/helloworld/helloworld GreeterClient > mock_helloworld/hw_mock.go ```
+
+Notice that in the above command we specify GreeterClient as the interface to be mocked.
+
+The user test code can import the package generated by mockgen along with library package gomock to write unit tests around client-side logic.
+```Go
+import "github.com/golang/mock/gomock"
+import hwmock "google.golang.org/grpc/examples/helloworld/mock/mock_helloworld"
+```
+
+An instance of the mocked interface can be created as:
+```Go
+mockGreeterClient := hwmock.NewMockGreeterClient(ctrl)
+```
+This mocked object can be programmed to expect calls to its methods and return pre-determined values. For instance, we can program mockGreeterClient to expect a call to its method SayHello and return a HelloReply with message “Mocked RPC”.
+
+```Go
+mockGreeterClient.EXPECT().SayHello(
+    gomock.Any(), // expect any value for first parameter
+    gomock.Any(), // expect any value for second parameter
+).Return(&helloworld.HelloReply{Message: “Mocked RPC”}, nil) 
+```
+
+gomock.Any() indicates that the parameter can have any value or type. We can indicate specific values for built-in types with gomock.Eq().
+However, if the test code needs to specify the parameter to have a proto message type, we can replace gomock.Any() with an instance of a struct that implements gomock.Matcher interface.
+
+```Go
+type rpcMsg struct {
+    msg proto.Message
+}
+
+func (r *rpcMsg) Matches(msg interface{}) bool {
+    m, ok := msg.(proto.Message)
+    if !ok {
+        return false
+    }
+    return proto.Equal(m, r.msg)
+}
+
+func (r *rpcMsg) String() string {
+    return fmt.Sprintf("is %s", r.msg)
+}
+
+...
+
+req := &helloworld.HelloRequest{Name: "unit_test"}
+mockGreeterClient.EXPECT().SayHello(
+    gomock.Any(),
+    &rpcMsg{msg: req},
+).Return(&helloworld.HelloReply{Message: "Mocked Interface"}, nil)
+```
+
+
+
diff --git a/vendor/google.golang.org/grpc/Documentation/grpc-auth-support.md b/vendor/google.golang.org/grpc/Documentation/grpc-auth-support.md
new file mode 100644
index 00000000000..248d272dce5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/Documentation/grpc-auth-support.md
@@ -0,0 +1,41 @@
+# Authentication
+
+As outlined in the [gRPC authentication guide](http://www.grpc.io/docs/guides/auth.html) there are a number of different mechanisms for asserting identity between an client and server. We'll present some code-samples here demonstrating how to provide TLS support encryption and identity assertions as well as passing OAuth2 tokens to services that support it.
+
+# Enabling TLS on a gRPC client
+
+```Go
+conn, err := grpc.Dial(serverAddr, grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")))
+```
+
+# Enabling TLS on a gRPC server
+
+```Go
+creds, err := credentials.NewServerTLSFromFile(certFile, keyFile)
+if err != nil {
+  log.Fatalf("Failed to generate credentials %v", err)
+}
+lis, err := net.Listen("tcp", ":0")
+server := grpc.NewServer(grpc.Creds(creds))
+...
+server.Serve(lis)
+```
+
+# Authenticating with Google
+
+## Google Compute Engine (GCE)
+
+```Go
+conn, err := grpc.Dial(serverAddr, grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")), grpc.WithPerRPCCredentials(oauth.NewComputeEngine()))
+```
+
+## JWT
+
+```Go
+jwtCreds, err := oauth.NewServiceAccountFromFile(*serviceAccountKeyFile, *oauthScope)
+if err != nil {
+  log.Fatalf("Failed to create JWT credentials: %v", err)
+}
+conn, err := grpc.Dial(serverAddr, grpc.WithTransportCredentials(credentials.NewClientTLSFromCert(nil, "")), grpc.WithPerRPCCredentials(jwtCreds))
+```
+
diff --git a/vendor/google.golang.org/grpc/Documentation/grpc-metadata.md b/vendor/google.golang.org/grpc/Documentation/grpc-metadata.md
new file mode 100644
index 00000000000..f36ef72af68
--- /dev/null
+++ b/vendor/google.golang.org/grpc/Documentation/grpc-metadata.md
@@ -0,0 +1,201 @@
+# Metadata
+
+gRPC supports sending metadata between client and server.
+This doc shows how to send and receive metadata in gRPC-go.
+
+## Background
+
+Four kinds of service method:
+
+- [Unary RPC](http://www.grpc.io/docs/guides/concepts.html#unary-rpc)
+- [Server streaming RPC](http://www.grpc.io/docs/guides/concepts.html#server-streaming-rpc)
+- [Client streaming RPC](http://www.grpc.io/docs/guides/concepts.html#client-streaming-rpc)
+- [Bidirectional streaming RPC](http://www.grpc.io/docs/guides/concepts.html#bidirectional-streaming-rpc)
+
+And concept of [metadata](http://www.grpc.io/docs/guides/concepts.html#metadata).
+
+## Constructing metadata
+
+A metadata can be created using package [metadata](https://godoc.org/google.golang.org/grpc/metadata).
+The type MD is actually a map from string to a list of strings:
+
+```go
+type MD map[string][]string
+```
+
+Metadata can be read like a normal map.
+Note that the value type of this map is `[]string`,
+so that users can attach multiple values using a single key.
+
+### Creating a new metadata
+
+A metadata can be created from a `map[string]string` using function `New`:
+
+```go
+md := metadata.New(map[string]string{"key1": "val1", "key2": "val2"})
+```
+
+Another way is to use `Pairs`.
+Values with the same key will be merged into a list:
+
+```go
+md := metadata.Pairs(
+    "key1", "val1",
+    "key1", "val1-2", // "key1" will have map value []string{"val1", "val1-2"}
+    "key2", "val2",
+)
+```
+
+__Note:__ all the keys will be automatically converted to lowercase,
+so "key1" and "kEy1" will be the same key and their values will be merged into the same list.
+This happens for both `New` and `Pairs`.
+
+### Storing binary data in metadata
+
+In metadata, keys are always strings. But values can be strings or binary data.
+To store binary data value in metadata, simply add "-bin" suffix to the key.
+The values with "-bin" suffixed keys will be encoded when creating the metadata:
+
+```go
+md := metadata.Pairs(
+    "key", "string value",
+    "key-bin", string([]byte{96, 102}), // this binary data will be encoded (base64) before sending
+                                        // and will be decoded after being transferred.
+)
+```
+
+## Retrieving metadata from context
+
+Metadata can be retrieved from context using `FromContext`:
+
+```go
+func (s *server) SomeRPC(ctx context.Context, in *pb.SomeRequest) (*pb.SomeResponse, err) {
+    md, ok := metadata.FromContext(ctx)
+    // do something with metadata
+}
+```
+
+## Sending and receiving metadata - client side
+
+[//]: # "TODO: uncomment next line after example source added"
+[//]: # "Real metadata sending and receiving examples are available [here](TODO:example_dir)."
+
+### Sending metadata
+
+To send metadata to server, the client can wrap the metadata into a context using `NewContext`, and make the RPC with this context:
+
+```go
+md := metadata.Pairs("key", "val")
+
+// create a new context with this metadata
+ctx := metadata.NewContext(context.Background(), md)
+
+// make unary RPC
+response, err := client.SomeRPC(ctx, someRequest)
+
+// or make streaming RPC
+stream, err := client.SomeStreamingRPC(ctx)
+```
+### Receiving metadata
+
+Metadata that a client can receive includes header and trailer.
+
+#### Unary call
+
+Header and trailer sent along with a unary call can be retrieved using function [Header](https://godoc.org/google.golang.org/grpc#Header) and [Trailer](https://godoc.org/google.golang.org/grpc#Trailer) in [CallOption](https://godoc.org/google.golang.org/grpc#CallOption):
+
+```go
+var header, trailer metadata.MD // variable to store header and trailer
+r, err := client.SomeRPC(
+    ctx,
+    someRequest,
+    grpc.Header(&header),    // will retrieve header
+    grpc.Trailer(&trailer),  // will retrieve trailer
+)
+
+// do something with header and trailer
+```
+
+#### Streaming call
+
+For streaming calls including:
+
+- Server streaming RPC
+- Client streaming RPC
+- Bidirectional streaming RPC
+
+Header and trailer can be retrieved from the returned stream using function `Header` and `Trailer` in interface [ClientStream](https://godoc.org/google.golang.org/grpc#ClientStream):
+
+```go
+stream, err := client.SomeStreamingRPC(ctx)
+
+// retrieve header
+header, err := stream.Header()
+
+// retrieve trailer
+trailer := stream.Trailer()
+
+```
+
+## Sending and receiving metadata - server side
+
+[//]: # "TODO: uncomment next line after example source added"
+[//]: # "Real metadata sending and receiving examples are available [here](TODO:example_dir)."
+
+### Receiving metadata
+
+To read metadata sent by the client, the server needs to retrieve it from RPC context.
+If it is a unary call, the RPC handler's context can be used.
+For streaming calls, the server needs to get context from the stream.
+
+#### Unary call
+
+```go
+func (s *server) SomeRPC(ctx context.Context, in *pb.someRequest) (*pb.someResponse, error) {
+    md, ok := metadata.FromContext(ctx)
+    // do something with metadata
+}
+```
+
+#### Streaming call
+
+```go
+func (s *server) SomeStreamingRPC(stream pb.Service_SomeStreamingRPCServer) error {
+    md, ok := metadata.FromContext(stream.Context()) // get context from stream
+    // do something with metadata
+}
+```
+
+### Sending metadata
+
+#### Unary call
+
+To send header and trailer to client in unary call, the server can call [SendHeader](https://godoc.org/google.golang.org/grpc#SendHeader) and [SetTrailer](https://godoc.org/google.golang.org/grpc#SetTrailer) functions in module [grpc](https://godoc.org/google.golang.org/grpc).
+These two functions take a context as the first parameter.
+It should be the RPC handler's context or one derived from it:
+
+```go
+func (s *server) SomeRPC(ctx context.Context, in *pb.someRequest) (*pb.someResponse, error) {
+    // create and send header
+    header := metadata.Pairs("header-key", "val")
+    grpc.SendHeader(ctx, header)
+    // create and set trailer
+    trailer := metadata.Pairs("trailer-key", "val")
+    grpc.SetTrailer(ctx, trailer)
+}
+```
+
+#### Streaming call
+
+For streaming calls, header and trailer can be sent using function `SendHeader` and `SetTrailer` in interface [ServerStream](https://godoc.org/google.golang.org/grpc#ServerStream):
+
+```go
+func (s *server) SomeStreamingRPC(stream pb.Service_SomeStreamingRPCServer) error {
+    // create and send header
+    header := metadata.Pairs("header-key", "val")
+    stream.SendHeader(header)
+    // create and set trailer
+    trailer := metadata.Pairs("trailer-key", "val")
+    stream.SetTrailer(trailer)
+}
+```
diff --git a/vendor/google.golang.org/grpc/Documentation/server-reflection-tutorial.md b/vendor/google.golang.org/grpc/Documentation/server-reflection-tutorial.md
new file mode 100644
index 00000000000..ca8e30cb418
--- /dev/null
+++ b/vendor/google.golang.org/grpc/Documentation/server-reflection-tutorial.md
@@ -0,0 +1,152 @@
+# gRPC Server Reflection Tutorial
+
+gRPC Server Reflection provides information about publicly-accessible gRPC
+services on a server, and assists clients at runtime to construct RPC
+requests and responses without precompiled service information. It is used by
+gRPC CLI, which can be used to introspect server protos and send/receive test
+RPCs.
+
+## Enable Server Reflection
+
+gRPC-go Server Reflection is implemented in package [reflection](https://github.com/grpc/grpc-go/tree/master/reflection). To enable server reflection, you need to import this package and register reflection service on your gRPC server.
+
+For example, to enable server reflection in `example/helloworld`, we need to make the following changes:
+
+```diff
+--- a/examples/helloworld/greeter_server/main.go
++++ b/examples/helloworld/greeter_server/main.go
+@@ -40,6 +40,7 @@ import (
+        "golang.org/x/net/context"
+        "google.golang.org/grpc"
+        pb "google.golang.org/grpc/examples/helloworld/helloworld"
++       "google.golang.org/grpc/reflection"
+ )
+
+ const (
+@@ -61,6 +62,8 @@ func main() {
+        }
+        s := grpc.NewServer()
+        pb.RegisterGreeterServer(s, &server{})
++       // Register reflection service on gRPC server.
++       reflection.Register(s)
+        if err := s.Serve(lis); err != nil {
+                log.Fatalf("failed to serve: %v", err)
+        }
+```
+
+We have made this change in `example/helloworld`, and we will use it as an example to show the use of gRPC server reflection and gRPC CLI in this tutorial.
+
+## gRPC CLI
+
+After enabling Server Reflection in a server application, you can use gRPC CLI to check its services.
+gRPC CLI is only available in c++. Instructions on how to use gRPC CLI can be found at [command_line_tool.md](https://github.com/grpc/grpc/blob/master/doc/command_line_tool.md).
+
+To build gRPC CLI:
+
+```sh
+git clone https://github.com/grpc/grpc
+cd grpc
+make grpc_cli
+cd bins/opt # grpc_cli is in directory bins/opt/
+```
+
+## Use gRPC CLI to check services
+
+First, start the helloworld server in grpc-go directory:
+
+```sh
+$ cd <grpc-go-directory>
+$ go run examples/helloworld/greeter_server/main.go
+```
+
+Open a new terminal and make sure you are in the directory where grpc_cli lives:
+
+```sh
+$ cd <grpc-cpp-dirctory>/bins/opt
+```
+
+### List services
+
+`grpc_cli ls` command lists services and methods exposed at a given port:
+
+- List all the services exposed at a given port
+
+  ```sh
+  $ ./grpc_cli ls localhost:50051
+  ```
+
+  output:
+  ```sh
+  helloworld.Greeter
+  grpc.reflection.v1alpha.ServerReflection
+  ```
+
+- List one service with details
+
+  `grpc_cli ls` command inspects a service given its full name (in the format of
+  \<package\>.\<service\>). It can print information with a long listing format
+  when `-l` flag is set. This flag can be used to get more details about a
+  service.
+
+  ```sh
+  $ ./grpc_cli ls localhost:50051 helloworld.Greeter -l
+  ```
+
+  output:
+  ```sh
+  filename: helloworld.proto
+  package: helloworld;
+  service Greeter {
+    rpc SayHello(helloworld.HelloRequest) returns (helloworld.HelloReply) {}
+  }
+
+  ```
+
+### List methods
+
+- List one method with details
+
+  `grpc_cli ls` command also inspects a method given its full name (in the
+  format of \<package\>.\<service\>.\<method\>).
+
+  ```sh
+  $ ./grpc_cli ls localhost:50051 helloworld.Greeter.SayHello -l
+  ```
+
+  output:
+  ```sh
+    rpc SayHello(helloworld.HelloRequest) returns (helloworld.HelloReply) {}
+  ```
+
+### Inspect message types
+
+We can use`grpc_cli type` command to inspect request/response types given the
+full name of the type (in the format of \<package\>.\<type\>).
+
+- Get information about the request type
+
+  ```sh
+  $ ./grpc_cli type localhost:50051 helloworld.HelloRequest
+  ```
+
+  output:
+  ```sh
+  message HelloRequest {
+    optional string name = 1[json_name = "name"];
+  }
+  ```
+
+### Call a remote method
+
+We can send RPCs to a server and get responses using `grpc_cli call` command.
+
+- Call a unary method
+
+  ```sh
+  $ ./grpc_cli call localhost:50051 SayHello "name: 'gRPC CLI'"
+  ```
+
+  output:
+  ```sh
+  message: "Hello gRPC CLI"
+  ```
diff --git a/vendor/google.golang.org/grpc/LICENSE b/vendor/google.golang.org/grpc/LICENSE
new file mode 100644
index 00000000000..f4988b45079
--- /dev/null
+++ b/vendor/google.golang.org/grpc/LICENSE
@@ -0,0 +1,28 @@
+Copyright 2014, Google Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/google.golang.org/grpc/Makefile b/vendor/google.golang.org/grpc/Makefile
new file mode 100644
index 00000000000..03bb01f0b35
--- /dev/null
+++ b/vendor/google.golang.org/grpc/Makefile
@@ -0,0 +1,52 @@
+all: test testrace
+
+deps:
+	go get -d -v google.golang.org/grpc/...
+
+updatedeps:
+	go get -d -v -u -f google.golang.org/grpc/...
+
+testdeps:
+	go get -d -v -t google.golang.org/grpc/...
+
+updatetestdeps:
+	go get -d -v -t -u -f google.golang.org/grpc/...
+
+build: deps
+	go build google.golang.org/grpc/...
+
+proto:
+	@ if ! which protoc > /dev/null; then \
+		echo "error: protoc not installed" >&2; \
+		exit 1; \
+	fi
+	go get -u -v github.com/golang/protobuf/protoc-gen-go
+	# use $$dir as the root for all proto files in the same directory
+	for dir in $$(git ls-files '*.proto' | xargs -n1 dirname | uniq); do \
+		protoc -I $$dir --go_out=plugins=grpc:$$dir $$dir/*.proto; \
+	done
+
+test: testdeps
+	go test -v -cpu 1,4 google.golang.org/grpc/...
+
+testrace: testdeps
+	go test -v -race -cpu 1,4 google.golang.org/grpc/...
+
+clean:
+	go clean -i google.golang.org/grpc/...
+
+coverage: testdeps
+	./coverage.sh --coveralls
+
+.PHONY: \
+	all \
+	deps \
+	updatedeps \
+	testdeps \
+	updatetestdeps \
+	build \
+	proto \
+	test \
+	testrace \
+	clean \
+	coverage
diff --git a/vendor/google.golang.org/grpc/PATENTS b/vendor/google.golang.org/grpc/PATENTS
new file mode 100644
index 00000000000..69b47959fab
--- /dev/null
+++ b/vendor/google.golang.org/grpc/PATENTS
@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the gRPC project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of gRPC, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of gRPC.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of gRPC or any code incorporated within this
+implementation of gRPC constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of gRPC
+shall terminate as of the date such litigation is filed.
diff --git a/vendor/google.golang.org/grpc/README.md b/vendor/google.golang.org/grpc/README.md
new file mode 100644
index 00000000000..4a655717cbe
--- /dev/null
+++ b/vendor/google.golang.org/grpc/README.md
@@ -0,0 +1,41 @@
+#gRPC-Go
+
+[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
+
+The Go implementation of [gRPC](http://www.grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start](http://www.grpc.io/docs/) guide.
+
+Installation
+------------
+
+To install this package, you need to install Go and setup your Go workspace on your computer. The simplest way to install the library is to run:
+
+```
+$ go get google.golang.org/grpc
+```
+
+Prerequisites
+-------------
+
+This requires Go 1.6 or later.
+
+Constraints
+-----------
+The grpc package should only depend on standard Go packages and a small number of exceptions. If your contribution introduces new dependencies which are NOT in the [list](http://godoc.org/google.golang.org/grpc?imports), you need a discussion with gRPC-Go authors and consultants.
+
+Documentation
+-------------
+See [API documentation](https://godoc.org/google.golang.org/grpc) for package and API descriptions and find examples in the [examples directory](examples/).
+
+Status
+------
+GA
+
+FAQ
+---
+
+#### Compiling error, undefined: grpc.SupportPackageIsVersion
+
+Please update proto package, gRPC package and rebuild the proto files:
+ - `go get -u github.com/golang/protobuf/{proto,protoc-gen-go}`
+ - `go get -u google.golang.org/grpc`
+ - `protoc --go_out=plugins=grpc:. *.proto`
diff --git a/vendor/google.golang.org/grpc/backoff.go b/vendor/google.golang.org/grpc/backoff.go
new file mode 100644
index 00000000000..c99024ee302
--- /dev/null
+++ b/vendor/google.golang.org/grpc/backoff.go
@@ -0,0 +1,80 @@
+package grpc
+
+import (
+	"math/rand"
+	"time"
+)
+
+// DefaultBackoffConfig uses values specified for backoff in
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+var (
+	DefaultBackoffConfig = BackoffConfig{
+		MaxDelay:  120 * time.Second,
+		baseDelay: 1.0 * time.Second,
+		factor:    1.6,
+		jitter:    0.2,
+	}
+)
+
+// backoffStrategy defines the methodology for backing off after a grpc
+// connection failure.
+//
+// This is unexported until the gRPC project decides whether or not to allow
+// alternative backoff strategies. Once a decision is made, this type and its
+// method may be exported.
+type backoffStrategy interface {
+	// backoff returns the amount of time to wait before the next retry given
+	// the number of consecutive failures.
+	backoff(retries int) time.Duration
+}
+
+// BackoffConfig defines the parameters for the default gRPC backoff strategy.
+type BackoffConfig struct {
+	// MaxDelay is the upper bound of backoff delay.
+	MaxDelay time.Duration
+
+	// TODO(stevvooe): The following fields are not exported, as allowing
+	// changes would violate the current gRPC specification for backoff. If
+	// gRPC decides to allow more interesting backoff strategies, these fields
+	// may be opened up in the future.
+
+	// baseDelay is the amount of time to wait before retrying after the first
+	// failure.
+	baseDelay time.Duration
+
+	// factor is applied to the backoff after each retry.
+	factor float64
+
+	// jitter provides a range to randomize backoff delays.
+	jitter float64
+}
+
+func setDefaults(bc *BackoffConfig) {
+	md := bc.MaxDelay
+	*bc = DefaultBackoffConfig
+
+	if md > 0 {
+		bc.MaxDelay = md
+	}
+}
+
+func (bc BackoffConfig) backoff(retries int) time.Duration {
+	if retries == 0 {
+		return bc.baseDelay
+	}
+	backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay)
+	for backoff < max && retries > 0 {
+		backoff *= bc.factor
+		retries--
+	}
+	if backoff > max {
+		backoff = max
+	}
+	// Randomize backoff delays so that if a cluster of requests start at
+	// the same time, they won't operate in lockstep.
+	backoff *= 1 + bc.jitter*(rand.Float64()*2-1)
+	if backoff < 0 {
+		return 0
+	}
+	return time.Duration(backoff)
+}
diff --git a/vendor/google.golang.org/grpc/backoff_test.go b/vendor/google.golang.org/grpc/backoff_test.go
new file mode 100644
index 00000000000..bfca7b17650
--- /dev/null
+++ b/vendor/google.golang.org/grpc/backoff_test.go
@@ -0,0 +1,11 @@
+package grpc
+
+import "testing"
+
+func TestBackoffConfigDefaults(t *testing.T) {
+	b := BackoffConfig{}
+	setDefaults(&b)
+	if b != DefaultBackoffConfig {
+		t.Fatalf("expected BackoffConfig to pickup default parameters: %v != %v", b, DefaultBackoffConfig)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/balancer.go b/vendor/google.golang.org/grpc/balancer.go
new file mode 100644
index 00000000000..9d943fbadae
--- /dev/null
+++ b/vendor/google.golang.org/grpc/balancer.go
@@ -0,0 +1,400 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"sync"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/naming"
+)
+
+// Address represents a server the client connects to.
+// This is the EXPERIMENTAL API and may be changed or extended in the future.
+type Address struct {
+	// Addr is the server address on which a connection will be established.
+	Addr string
+	// Metadata is the information associated with Addr, which may be used
+	// to make load balancing decision.
+	Metadata interface{}
+}
+
+// BalancerConfig specifies the configurations for Balancer.
+type BalancerConfig struct {
+	// DialCreds is the transport credential the Balancer implementation can
+	// use to dial to a remote load balancer server. The Balancer implementations
+	// can ignore this if it does not need to talk to another party securely.
+	DialCreds credentials.TransportCredentials
+}
+
+// BalancerGetOptions configures a Get call.
+// This is the EXPERIMENTAL API and may be changed or extended in the future.
+type BalancerGetOptions struct {
+	// BlockingWait specifies whether Get should block when there is no
+	// connected address.
+	BlockingWait bool
+}
+
+// Balancer chooses network addresses for RPCs.
+// This is the EXPERIMENTAL API and may be changed or extended in the future.
+type Balancer interface {
+	// Start does the initialization work to bootstrap a Balancer. For example,
+	// this function may start the name resolution and watch the updates. It will
+	// be called when dialing.
+	Start(target string, config BalancerConfig) error
+	// Up informs the Balancer that gRPC has a connection to the server at
+	// addr. It returns down which is called once the connection to addr gets
+	// lost or closed.
+	// TODO: It is not clear how to construct and take advantage of the meaningful error
+	// parameter for down. Need realistic demands to guide.
+	Up(addr Address) (down func(error))
+	// Get gets the address of a server for the RPC corresponding to ctx.
+	// i) If it returns a connected address, gRPC internals issues the RPC on the
+	// connection to this address;
+	// ii) If it returns an address on which the connection is under construction
+	// (initiated by Notify(...)) but not connected, gRPC internals
+	//  * fails RPC if the RPC is fail-fast and connection is in the TransientFailure or
+	//  Shutdown state;
+	//  or
+	//  * issues RPC on the connection otherwise.
+	// iii) If it returns an address on which the connection does not exist, gRPC
+	// internals treats it as an error and will fail the corresponding RPC.
+	//
+	// Therefore, the following is the recommended rule when writing a custom Balancer.
+	// If opts.BlockingWait is true, it should return a connected address or
+	// block if there is no connected address. It should respect the timeout or
+	// cancellation of ctx when blocking. If opts.BlockingWait is false (for fail-fast
+	// RPCs), it should return an address it has notified via Notify(...) immediately
+	// instead of blocking.
+	//
+	// The function returns put which is called once the rpc has completed or failed.
+	// put can collect and report RPC stats to a remote load balancer.
+	//
+	// This function should only return the errors Balancer cannot recover by itself.
+	// gRPC internals will fail the RPC if an error is returned.
+	Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error)
+	// Notify returns a channel that is used by gRPC internals to watch the addresses
+	// gRPC needs to connect. The addresses might be from a name resolver or remote
+	// load balancer. gRPC internals will compare it with the existing connected
+	// addresses. If the address Balancer notified is not in the existing connected
+	// addresses, gRPC starts to connect the address. If an address in the existing
+	// connected addresses is not in the notification list, the corresponding connection
+	// is shutdown gracefully. Otherwise, there are no operations to take. Note that
+	// the Address slice must be the full list of the Addresses which should be connected.
+	// It is NOT delta.
+	Notify() <-chan []Address
+	// Close shuts down the balancer.
+	Close() error
+}
+
+// downErr implements net.Error. It is constructed by gRPC internals and passed to the down
+// call of Balancer.
+type downErr struct {
+	timeout   bool
+	temporary bool
+	desc      string
+}
+
+func (e downErr) Error() string   { return e.desc }
+func (e downErr) Timeout() bool   { return e.timeout }
+func (e downErr) Temporary() bool { return e.temporary }
+
+func downErrorf(timeout, temporary bool, format string, a ...interface{}) downErr {
+	return downErr{
+		timeout:   timeout,
+		temporary: temporary,
+		desc:      fmt.Sprintf(format, a...),
+	}
+}
+
+// RoundRobin returns a Balancer that selects addresses round-robin. It uses r to watch
+// the name resolution updates and updates the addresses available correspondingly.
+func RoundRobin(r naming.Resolver) Balancer {
+	return &roundRobin{r: r}
+}
+
+type addrInfo struct {
+	addr      Address
+	connected bool
+}
+
+type roundRobin struct {
+	r      naming.Resolver
+	w      naming.Watcher
+	addrs  []*addrInfo // all the addresses the client should potentially connect
+	mu     sync.Mutex
+	addrCh chan []Address // the channel to notify gRPC internals the list of addresses the client should connect to.
+	next   int            // index of the next address to return for Get()
+	waitCh chan struct{}  // the channel to block when there is no connected address available
+	done   bool           // The Balancer is closed.
+}
+
+func (rr *roundRobin) watchAddrUpdates() error {
+	updates, err := rr.w.Next()
+	if err != nil {
+		grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err)
+		return err
+	}
+	rr.mu.Lock()
+	defer rr.mu.Unlock()
+	for _, update := range updates {
+		addr := Address{
+			Addr:     update.Addr,
+			Metadata: update.Metadata,
+		}
+		switch update.Op {
+		case naming.Add:
+			var exist bool
+			for _, v := range rr.addrs {
+				if addr == v.addr {
+					exist = true
+					grpclog.Println("grpc: The name resolver wanted to add an existing address: ", addr)
+					break
+				}
+			}
+			if exist {
+				continue
+			}
+			rr.addrs = append(rr.addrs, &addrInfo{addr: addr})
+		case naming.Delete:
+			for i, v := range rr.addrs {
+				if addr == v.addr {
+					copy(rr.addrs[i:], rr.addrs[i+1:])
+					rr.addrs = rr.addrs[:len(rr.addrs)-1]
+					break
+				}
+			}
+		default:
+			grpclog.Println("Unknown update.Op ", update.Op)
+		}
+	}
+	// Make a copy of rr.addrs and write it onto rr.addrCh so that gRPC internals gets notified.
+	open := make([]Address, len(rr.addrs))
+	for i, v := range rr.addrs {
+		open[i] = v.addr
+	}
+	if rr.done {
+		return ErrClientConnClosing
+	}
+	rr.addrCh <- open
+	return nil
+}
+
+func (rr *roundRobin) Start(target string, config BalancerConfig) error {
+	rr.mu.Lock()
+	defer rr.mu.Unlock()
+	if rr.done {
+		return ErrClientConnClosing
+	}
+	if rr.r == nil {
+		// If there is no name resolver installed, it is not needed to
+		// do name resolution. In this case, target is added into rr.addrs
+		// as the only address available and rr.addrCh stays nil.
+		rr.addrs = append(rr.addrs, &addrInfo{addr: Address{Addr: target}})
+		return nil
+	}
+	w, err := rr.r.Resolve(target)
+	if err != nil {
+		return err
+	}
+	rr.w = w
+	rr.addrCh = make(chan []Address)
+	go func() {
+		for {
+			if err := rr.watchAddrUpdates(); err != nil {
+				return
+			}
+		}
+	}()
+	return nil
+}
+
+// Up sets the connected state of addr and sends notification if there are pending
+// Get() calls.
+func (rr *roundRobin) Up(addr Address) func(error) {
+	rr.mu.Lock()
+	defer rr.mu.Unlock()
+	var cnt int
+	for _, a := range rr.addrs {
+		if a.addr == addr {
+			if a.connected {
+				return nil
+			}
+			a.connected = true
+		}
+		if a.connected {
+			cnt++
+		}
+	}
+	// addr is only one which is connected. Notify the Get() callers who are blocking.
+	if cnt == 1 && rr.waitCh != nil {
+		close(rr.waitCh)
+		rr.waitCh = nil
+	}
+	return func(err error) {
+		rr.down(addr, err)
+	}
+}
+
+// down unsets the connected state of addr.
+func (rr *roundRobin) down(addr Address, err error) {
+	rr.mu.Lock()
+	defer rr.mu.Unlock()
+	for _, a := range rr.addrs {
+		if addr == a.addr {
+			a.connected = false
+			break
+		}
+	}
+}
+
+// Get returns the next addr in the rotation.
+func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
+	var ch chan struct{}
+	rr.mu.Lock()
+	if rr.done {
+		rr.mu.Unlock()
+		err = ErrClientConnClosing
+		return
+	}
+
+	if len(rr.addrs) > 0 {
+		if rr.next >= len(rr.addrs) {
+			rr.next = 0
+		}
+		next := rr.next
+		for {
+			a := rr.addrs[next]
+			next = (next + 1) % len(rr.addrs)
+			if a.connected {
+				addr = a.addr
+				rr.next = next
+				rr.mu.Unlock()
+				return
+			}
+			if next == rr.next {
+				// Has iterated all the possible address but none is connected.
+				break
+			}
+		}
+	}
+	if !opts.BlockingWait {
+		if len(rr.addrs) == 0 {
+			rr.mu.Unlock()
+			err = Errorf(codes.Unavailable, "there is no address available")
+			return
+		}
+		// Returns the next addr on rr.addrs for failfast RPCs.
+		addr = rr.addrs[rr.next].addr
+		rr.next++
+		rr.mu.Unlock()
+		return
+	}
+	// Wait on rr.waitCh for non-failfast RPCs.
+	if rr.waitCh == nil {
+		ch = make(chan struct{})
+		rr.waitCh = ch
+	} else {
+		ch = rr.waitCh
+	}
+	rr.mu.Unlock()
+	for {
+		select {
+		case <-ctx.Done():
+			err = ctx.Err()
+			return
+		case <-ch:
+			rr.mu.Lock()
+			if rr.done {
+				rr.mu.Unlock()
+				err = ErrClientConnClosing
+				return
+			}
+
+			if len(rr.addrs) > 0 {
+				if rr.next >= len(rr.addrs) {
+					rr.next = 0
+				}
+				next := rr.next
+				for {
+					a := rr.addrs[next]
+					next = (next + 1) % len(rr.addrs)
+					if a.connected {
+						addr = a.addr
+						rr.next = next
+						rr.mu.Unlock()
+						return
+					}
+					if next == rr.next {
+						// Has iterated all the possible address but none is connected.
+						break
+					}
+				}
+			}
+			// The newly added addr got removed by Down() again.
+			if rr.waitCh == nil {
+				ch = make(chan struct{})
+				rr.waitCh = ch
+			} else {
+				ch = rr.waitCh
+			}
+			rr.mu.Unlock()
+		}
+	}
+}
+
+func (rr *roundRobin) Notify() <-chan []Address {
+	return rr.addrCh
+}
+
+func (rr *roundRobin) Close() error {
+	rr.mu.Lock()
+	defer rr.mu.Unlock()
+	rr.done = true
+	if rr.w != nil {
+		rr.w.Close()
+	}
+	if rr.waitCh != nil {
+		close(rr.waitCh)
+		rr.waitCh = nil
+	}
+	if rr.addrCh != nil {
+		close(rr.addrCh)
+	}
+	return nil
+}
diff --git a/vendor/google.golang.org/grpc/balancer_test.go b/vendor/google.golang.org/grpc/balancer_test.go
new file mode 100644
index 00000000000..48f8b27d462
--- /dev/null
+++ b/vendor/google.golang.org/grpc/balancer_test.go
@@ -0,0 +1,438 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"math"
+	"sync"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/naming"
+)
+
+type testWatcher struct {
+	// the channel to receives name resolution updates
+	update chan *naming.Update
+	// the side channel to get to know how many updates in a batch
+	side chan int
+	// the channel to notifiy update injector that the update reading is done
+	readDone chan int
+}
+
+func (w *testWatcher) Next() (updates []*naming.Update, err error) {
+	n := <-w.side
+	if n == 0 {
+		return nil, fmt.Errorf("w.side is closed")
+	}
+	for i := 0; i < n; i++ {
+		u := <-w.update
+		if u != nil {
+			updates = append(updates, u)
+		}
+	}
+	w.readDone <- 0
+	return
+}
+
+func (w *testWatcher) Close() {
+}
+
+// Inject naming resolution updates to the testWatcher.
+func (w *testWatcher) inject(updates []*naming.Update) {
+	w.side <- len(updates)
+	for _, u := range updates {
+		w.update <- u
+	}
+	<-w.readDone
+}
+
+type testNameResolver struct {
+	w    *testWatcher
+	addr string
+}
+
+func (r *testNameResolver) Resolve(target string) (naming.Watcher, error) {
+	r.w = &testWatcher{
+		update:   make(chan *naming.Update, 1),
+		side:     make(chan int, 1),
+		readDone: make(chan int),
+	}
+	r.w.side <- 1
+	r.w.update <- &naming.Update{
+		Op:   naming.Add,
+		Addr: r.addr,
+	}
+	go func() {
+		<-r.w.readDone
+	}()
+	return r.w, nil
+}
+
+func startServers(t *testing.T, numServers int, maxStreams uint32) ([]*server, *testNameResolver) {
+	var servers []*server
+	for i := 0; i < numServers; i++ {
+		s := newTestServer()
+		servers = append(servers, s)
+		go s.start(t, 0, maxStreams)
+		s.wait(t, 2*time.Second)
+	}
+	// Point to server[0]
+	addr := "127.0.0.1:" + servers[0].port
+	return servers, &testNameResolver{
+		addr: addr,
+	}
+}
+
+func TestNameDiscovery(t *testing.T) {
+	// Start 2 servers on 2 ports.
+	numServers := 2
+	servers, r := startServers(t, numServers, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	req := "port"
+	var reply string
+	if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || ErrorDesc(err) != servers[0].port {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want %s", err, servers[0].port)
+	}
+	// Inject the name resolution change to remove servers[0] and add servers[1].
+	var updates []*naming.Update
+	updates = append(updates, &naming.Update{
+		Op:   naming.Delete,
+		Addr: "127.0.0.1:" + servers[0].port,
+	})
+	updates = append(updates, &naming.Update{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[1].port,
+	})
+	r.w.inject(updates)
+	// Loop until the rpcs in flight talks to servers[1].
+	for {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && ErrorDesc(err) == servers[1].port {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	cc.Close()
+	for i := 0; i < numServers; i++ {
+		servers[i].stop()
+	}
+}
+
+func TestEmptyAddrs(t *testing.T) {
+	servers, r := startServers(t, 1, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	var reply string
+	if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc); err != nil || reply != expectedResponse {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, reply = %q, want %q, <nil>", err, reply, expectedResponse)
+	}
+	// Inject name resolution change to remove the server so that there is no address
+	// available after that.
+	u := &naming.Update{
+		Op:   naming.Delete,
+		Addr: "127.0.0.1:" + servers[0].port,
+	}
+	r.w.inject([]*naming.Update{u})
+	// Loop until the above updates apply.
+	for {
+		time.Sleep(10 * time.Millisecond)
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if err := Invoke(ctx, "/foo/bar", &expectedRequest, &reply, cc); err != nil {
+			break
+		}
+	}
+	cc.Close()
+	servers[0].stop()
+}
+
+func TestRoundRobin(t *testing.T) {
+	// Start 3 servers on 3 ports.
+	numServers := 3
+	servers, r := startServers(t, numServers, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	// Add servers[1] to the service discovery.
+	u := &naming.Update{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[1].port,
+	}
+	r.w.inject([]*naming.Update{u})
+	req := "port"
+	var reply string
+	// Loop until servers[1] is up
+	for {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && ErrorDesc(err) == servers[1].port {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	// Add server2[2] to the service discovery.
+	u = &naming.Update{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[2].port,
+	}
+	r.w.inject([]*naming.Update{u})
+	// Loop until both servers[2] are up.
+	for {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && ErrorDesc(err) == servers[2].port {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	// Check the incoming RPCs served in a round-robin manner.
+	for i := 0; i < 10; i++ {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || ErrorDesc(err) != servers[i%numServers].port {
+			t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", i, err, servers[i%numServers].port)
+		}
+	}
+	cc.Close()
+	for i := 0; i < numServers; i++ {
+		servers[i].stop()
+	}
+}
+
+func TestCloseWithPendingRPC(t *testing.T) {
+	servers, r := startServers(t, 1, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	var reply string
+	if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); err != nil {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want %s", err, servers[0].port)
+	}
+	// Remove the server.
+	updates := []*naming.Update{{
+		Op:   naming.Delete,
+		Addr: "127.0.0.1:" + servers[0].port,
+	}}
+	r.w.inject(updates)
+	// Loop until the above update applies.
+	for {
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if err := Invoke(ctx, "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); Code(err) == codes.DeadlineExceeded {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	// Issue 2 RPCs which should be completed with error status once cc is closed.
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go func() {
+		defer wg.Done()
+		var reply string
+		if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); err == nil {
+			t.Errorf("grpc.Invoke(_, _, _, _, _) = %v, want not nil", err)
+		}
+	}()
+	go func() {
+		defer wg.Done()
+		var reply string
+		time.Sleep(5 * time.Millisecond)
+		if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); err == nil {
+			t.Errorf("grpc.Invoke(_, _, _, _, _) = %v, want not nil", err)
+		}
+	}()
+	time.Sleep(5 * time.Millisecond)
+	cc.Close()
+	wg.Wait()
+	servers[0].stop()
+}
+
+func TestGetOnWaitChannel(t *testing.T) {
+	servers, r := startServers(t, 1, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	// Remove all servers so that all upcoming RPCs will block on waitCh.
+	updates := []*naming.Update{{
+		Op:   naming.Delete,
+		Addr: "127.0.0.1:" + servers[0].port,
+	}}
+	r.w.inject(updates)
+	for {
+		var reply string
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if err := Invoke(ctx, "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); Code(err) == codes.DeadlineExceeded {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		var reply string
+		if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); err != nil {
+			t.Errorf("grpc.Invoke(_, _, _, _, _) = %v, want <nil>", err)
+		}
+	}()
+	// Add a connected server to get the above RPC through.
+	updates = []*naming.Update{{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[0].port,
+	}}
+	r.w.inject(updates)
+	// Wait until the above RPC succeeds.
+	wg.Wait()
+	cc.Close()
+	servers[0].stop()
+}
+
+func TestOneServerDown(t *testing.T) {
+	// Start 2 servers.
+	numServers := 2
+	servers, r := startServers(t, numServers, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	// Add servers[1] to the service discovery.
+	var updates []*naming.Update
+	updates = append(updates, &naming.Update{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[1].port,
+	})
+	r.w.inject(updates)
+	req := "port"
+	var reply string
+	// Loop until servers[1] is up
+	for {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && ErrorDesc(err) == servers[1].port {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	var wg sync.WaitGroup
+	numRPC := 100
+	sleepDuration := 10 * time.Millisecond
+	wg.Add(1)
+	go func() {
+		time.Sleep(sleepDuration)
+		// After sleepDuration, kill server[0].
+		servers[0].stop()
+		wg.Done()
+	}()
+
+	// All non-failfast RPCs should not block because there's at least one connection available.
+	for i := 0; i < numRPC; i++ {
+		wg.Add(1)
+		go func() {
+			time.Sleep(sleepDuration)
+			// After sleepDuration, invoke RPC.
+			// server[0] is killed around the same time to make it racy between balancer and gRPC internals.
+			Invoke(context.Background(), "/foo/bar", &req, &reply, cc, FailFast(false))
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+	cc.Close()
+	for i := 0; i < numServers; i++ {
+		servers[i].stop()
+	}
+}
+
+func TestOneAddressRemoval(t *testing.T) {
+	// Start 2 servers.
+	numServers := 2
+	servers, r := startServers(t, numServers, math.MaxUint32)
+	cc, err := Dial("foo.bar.com", WithBalancer(RoundRobin(r)), WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	// Add servers[1] to the service discovery.
+	var updates []*naming.Update
+	updates = append(updates, &naming.Update{
+		Op:   naming.Add,
+		Addr: "127.0.0.1:" + servers[1].port,
+	})
+	r.w.inject(updates)
+	req := "port"
+	var reply string
+	// Loop until servers[1] is up
+	for {
+		if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && ErrorDesc(err) == servers[1].port {
+			break
+		}
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	var wg sync.WaitGroup
+	numRPC := 100
+	sleepDuration := 10 * time.Millisecond
+	wg.Add(1)
+	go func() {
+		time.Sleep(sleepDuration)
+		// After sleepDuration, delete server[0].
+		var updates []*naming.Update
+		updates = append(updates, &naming.Update{
+			Op:   naming.Delete,
+			Addr: "127.0.0.1:" + servers[0].port,
+		})
+		r.w.inject(updates)
+		wg.Done()
+	}()
+
+	// All non-failfast RPCs should not fail because there's at least one connection available.
+	for i := 0; i < numRPC; i++ {
+		wg.Add(1)
+		go func() {
+			var reply string
+			time.Sleep(sleepDuration)
+			// After sleepDuration, invoke RPC.
+			// server[0] is removed around the same time to make it racy between balancer and gRPC internals.
+			if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc, FailFast(false)); err != nil {
+				t.Errorf("grpc.Invoke(_, _, _, _, _) = %v, want not nil", err)
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+	cc.Close()
+	for i := 0; i < numServers; i++ {
+		servers[i].stop()
+	}
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/benchmark.go b/vendor/google.golang.org/grpc/benchmark/benchmark.go
new file mode 100644
index 00000000000..fc3304acc46
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/benchmark.go
@@ -0,0 +1,234 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+Package benchmark implements the building blocks to setup end-to-end gRPC benchmarks.
+*/
+package benchmark
+
+import (
+	"fmt"
+	"io"
+	"net"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/grpclog"
+)
+
+// Allows reuse of the same testpb.Payload object.
+func setPayload(p *testpb.Payload, t testpb.PayloadType, size int) {
+	if size < 0 {
+		grpclog.Fatalf("Requested a response with invalid length %d", size)
+	}
+	body := make([]byte, size)
+	switch t {
+	case testpb.PayloadType_COMPRESSABLE:
+	case testpb.PayloadType_UNCOMPRESSABLE:
+		grpclog.Fatalf("PayloadType UNCOMPRESSABLE is not supported")
+	default:
+		grpclog.Fatalf("Unsupported payload type: %d", t)
+	}
+	p.Type = t
+	p.Body = body
+	return
+}
+
+func newPayload(t testpb.PayloadType, size int) *testpb.Payload {
+	p := new(testpb.Payload)
+	setPayload(p, t, size)
+	return p
+}
+
+type testServer struct {
+}
+
+func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	return &testpb.SimpleResponse{
+		Payload: newPayload(in.ResponseType, int(in.ResponseSize)),
+	}, nil
+}
+
+func (s *testServer) StreamingCall(stream testpb.BenchmarkService_StreamingCallServer) error {
+	response := &testpb.SimpleResponse{
+		Payload: new(testpb.Payload),
+	}
+	in := new(testpb.SimpleRequest)
+	for {
+		// use ServerStream directly to reuse the same testpb.SimpleRequest object
+		err := stream.(grpc.ServerStream).RecvMsg(in)
+		if err == io.EOF {
+			// read done.
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		setPayload(response.Payload, in.ResponseType, int(in.ResponseSize))
+		if err := stream.Send(response); err != nil {
+			return err
+		}
+	}
+}
+
+// byteBufServer is a gRPC server that sends and receives byte buffer.
+// The purpose is to benchmark the gRPC performance without protobuf serialization/deserialization overhead.
+type byteBufServer struct {
+	respSize int32
+}
+
+// UnaryCall is an empty function and is not used for benchmark.
+// If bytebuf UnaryCall benchmark is needed later, the function body needs to be updated.
+func (s *byteBufServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	return &testpb.SimpleResponse{}, nil
+}
+
+func (s *byteBufServer) StreamingCall(stream testpb.BenchmarkService_StreamingCallServer) error {
+	for {
+		var in []byte
+		err := stream.(grpc.ServerStream).RecvMsg(&in)
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		out := make([]byte, s.respSize)
+		if err := stream.(grpc.ServerStream).SendMsg(&out); err != nil {
+			return err
+		}
+	}
+}
+
+// ServerInfo contains the information to create a gRPC benchmark server.
+type ServerInfo struct {
+	// Addr is the address of the server.
+	Addr string
+
+	// Type is the type of the server.
+	// It should be "protobuf" or "bytebuf".
+	Type string
+
+	// Metadata is an optional configuration.
+	// For "protobuf", it's ignored.
+	// For "bytebuf", it should be an int representing response size.
+	Metadata interface{}
+}
+
+// StartServer starts a gRPC server serving a benchmark service according to info.
+// It returns its listen address and a function to stop the server.
+func StartServer(info ServerInfo, opts ...grpc.ServerOption) (string, func()) {
+	lis, err := net.Listen("tcp", info.Addr)
+	if err != nil {
+		grpclog.Fatalf("Failed to listen: %v", err)
+	}
+	s := grpc.NewServer(opts...)
+	switch info.Type {
+	case "protobuf":
+		testpb.RegisterBenchmarkServiceServer(s, &testServer{})
+	case "bytebuf":
+		respSize, ok := info.Metadata.(int32)
+		if !ok {
+			grpclog.Fatalf("failed to StartServer, invalid metadata: %v, for Type: %v", info.Metadata, info.Type)
+		}
+		testpb.RegisterBenchmarkServiceServer(s, &byteBufServer{respSize: respSize})
+	default:
+		grpclog.Fatalf("failed to StartServer, unknown Type: %v", info.Type)
+	}
+	go s.Serve(lis)
+	return lis.Addr().String(), func() {
+		s.Stop()
+	}
+}
+
+// DoUnaryCall performs an unary RPC with given stub and request and response sizes.
+func DoUnaryCall(tc testpb.BenchmarkServiceClient, reqSize, respSize int) error {
+	pl := newPayload(testpb.PayloadType_COMPRESSABLE, reqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType: pl.Type,
+		ResponseSize: int32(respSize),
+		Payload:      pl,
+	}
+	if _, err := tc.UnaryCall(context.Background(), req); err != nil {
+		return fmt.Errorf("/BenchmarkService/UnaryCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	return nil
+}
+
+// DoStreamingRoundTrip performs a round trip for a single streaming rpc.
+func DoStreamingRoundTrip(stream testpb.BenchmarkService_StreamingCallClient, reqSize, respSize int) error {
+	pl := newPayload(testpb.PayloadType_COMPRESSABLE, reqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType: pl.Type,
+		ResponseSize: int32(respSize),
+		Payload:      pl,
+	}
+	if err := stream.Send(req); err != nil {
+		return fmt.Errorf("/BenchmarkService/StreamingCall.Send(_) = %v, want <nil>", err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		// EOF is a valid error here.
+		if err == io.EOF {
+			return nil
+		}
+		return fmt.Errorf("/BenchmarkService/StreamingCall.Recv(_) = %v, want <nil>", err)
+	}
+	return nil
+}
+
+// DoByteBufStreamingRoundTrip performs a round trip for a single streaming rpc, using a custom codec for byte buffer.
+func DoByteBufStreamingRoundTrip(stream testpb.BenchmarkService_StreamingCallClient, reqSize, respSize int) error {
+	out := make([]byte, reqSize)
+	if err := stream.(grpc.ClientStream).SendMsg(&out); err != nil {
+		return fmt.Errorf("/BenchmarkService/StreamingCall.(ClientStream).SendMsg(_) = %v, want <nil>", err)
+	}
+	var in []byte
+	if err := stream.(grpc.ClientStream).RecvMsg(&in); err != nil {
+		// EOF is a valid error here.
+		if err == io.EOF {
+			return nil
+		}
+		return fmt.Errorf("/BenchmarkService/StreamingCall.(ClientStream).RecvMsg(_) = %v, want <nil>", err)
+	}
+	return nil
+}
+
+// NewClientConn creates a gRPC client connection to addr.
+func NewClientConn(addr string, opts ...grpc.DialOption) *grpc.ClientConn {
+	conn, err := grpc.Dial(addr, opts...)
+	if err != nil {
+		grpclog.Fatalf("NewClientConn(%q) failed to create a ClientConn %v", addr, err)
+	}
+	return conn
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/benchmark_test.go b/vendor/google.golang.org/grpc/benchmark/benchmark_test.go
new file mode 100644
index 00000000000..8fe3fa1581a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/benchmark_test.go
@@ -0,0 +1,202 @@
+package benchmark
+
+import (
+	"os"
+	"sync"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/benchmark/stats"
+	"google.golang.org/grpc/grpclog"
+)
+
+func runUnary(b *testing.B, maxConcurrentCalls int) {
+	s := stats.AddStats(b, 38)
+	b.StopTimer()
+	target, stopper := StartServer(ServerInfo{Addr: "localhost:0", Type: "protobuf"})
+	defer stopper()
+	conn := NewClientConn(target, grpc.WithInsecure())
+	tc := testpb.NewBenchmarkServiceClient(conn)
+
+	// Warm up connection.
+	for i := 0; i < 10; i++ {
+		unaryCaller(tc)
+	}
+	ch := make(chan int, maxConcurrentCalls*4)
+	var (
+		mu sync.Mutex
+		wg sync.WaitGroup
+	)
+	wg.Add(maxConcurrentCalls)
+
+	// Distribute the b.N calls over maxConcurrentCalls workers.
+	for i := 0; i < maxConcurrentCalls; i++ {
+		go func() {
+			for range ch {
+				start := time.Now()
+				unaryCaller(tc)
+				elapse := time.Since(start)
+				mu.Lock()
+				s.Add(elapse)
+				mu.Unlock()
+			}
+			wg.Done()
+		}()
+	}
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		ch <- i
+	}
+	b.StopTimer()
+	close(ch)
+	wg.Wait()
+	conn.Close()
+}
+
+func runStream(b *testing.B, maxConcurrentCalls int) {
+	s := stats.AddStats(b, 38)
+	b.StopTimer()
+	target, stopper := StartServer(ServerInfo{Addr: "localhost:0", Type: "protobuf"})
+	defer stopper()
+	conn := NewClientConn(target, grpc.WithInsecure())
+	tc := testpb.NewBenchmarkServiceClient(conn)
+
+	// Warm up connection.
+	stream, err := tc.StreamingCall(context.Background())
+	if err != nil {
+		b.Fatalf("%v.StreamingCall(_) = _, %v", tc, err)
+	}
+	for i := 0; i < 10; i++ {
+		streamCaller(stream)
+	}
+
+	ch := make(chan int, maxConcurrentCalls*4)
+	var (
+		mu sync.Mutex
+		wg sync.WaitGroup
+	)
+	wg.Add(maxConcurrentCalls)
+
+	// Distribute the b.N calls over maxConcurrentCalls workers.
+	for i := 0; i < maxConcurrentCalls; i++ {
+		go func() {
+			stream, err := tc.StreamingCall(context.Background())
+			if err != nil {
+				b.Fatalf("%v.StreamingCall(_) = _, %v", tc, err)
+			}
+			for range ch {
+				start := time.Now()
+				streamCaller(stream)
+				elapse := time.Since(start)
+				mu.Lock()
+				s.Add(elapse)
+				mu.Unlock()
+			}
+			wg.Done()
+		}()
+	}
+	b.StartTimer()
+	for i := 0; i < b.N; i++ {
+		ch <- i
+	}
+	b.StopTimer()
+	close(ch)
+	wg.Wait()
+	conn.Close()
+}
+func unaryCaller(client testpb.BenchmarkServiceClient) {
+	if err := DoUnaryCall(client, 1, 1); err != nil {
+		grpclog.Fatalf("DoUnaryCall failed: %v", err)
+	}
+}
+
+func streamCaller(stream testpb.BenchmarkService_StreamingCallClient) {
+	if err := DoStreamingRoundTrip(stream, 1, 1); err != nil {
+		grpclog.Fatalf("DoStreamingRoundTrip failed: %v", err)
+	}
+}
+
+func BenchmarkClientStreamc1(b *testing.B) {
+	grpc.EnableTracing = true
+	runStream(b, 1)
+}
+
+func BenchmarkClientStreamc8(b *testing.B) {
+	grpc.EnableTracing = true
+	runStream(b, 8)
+}
+
+func BenchmarkClientStreamc64(b *testing.B) {
+	grpc.EnableTracing = true
+	runStream(b, 64)
+}
+
+func BenchmarkClientStreamc512(b *testing.B) {
+	grpc.EnableTracing = true
+	runStream(b, 512)
+}
+func BenchmarkClientUnaryc1(b *testing.B) {
+	grpc.EnableTracing = true
+	runUnary(b, 1)
+}
+
+func BenchmarkClientUnaryc8(b *testing.B) {
+	grpc.EnableTracing = true
+	runUnary(b, 8)
+}
+
+func BenchmarkClientUnaryc64(b *testing.B) {
+	grpc.EnableTracing = true
+	runUnary(b, 64)
+}
+
+func BenchmarkClientUnaryc512(b *testing.B) {
+	grpc.EnableTracing = true
+	runUnary(b, 512)
+}
+
+func BenchmarkClientStreamNoTracec1(b *testing.B) {
+	grpc.EnableTracing = false
+	runStream(b, 1)
+}
+
+func BenchmarkClientStreamNoTracec8(b *testing.B) {
+	grpc.EnableTracing = false
+	runStream(b, 8)
+}
+
+func BenchmarkClientStreamNoTracec64(b *testing.B) {
+	grpc.EnableTracing = false
+	runStream(b, 64)
+}
+
+func BenchmarkClientStreamNoTracec512(b *testing.B) {
+	grpc.EnableTracing = false
+	runStream(b, 512)
+}
+func BenchmarkClientUnaryNoTracec1(b *testing.B) {
+	grpc.EnableTracing = false
+	runUnary(b, 1)
+}
+
+func BenchmarkClientUnaryNoTracec8(b *testing.B) {
+	grpc.EnableTracing = false
+	runUnary(b, 8)
+}
+
+func BenchmarkClientUnaryNoTracec64(b *testing.B) {
+	grpc.EnableTracing = false
+	runUnary(b, 64)
+}
+
+func BenchmarkClientUnaryNoTracec512(b *testing.B) {
+	grpc.EnableTracing = false
+	runUnary(b, 512)
+}
+
+func TestMain(m *testing.M) {
+	os.Exit(stats.RunTestMain(m))
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/client/main.go b/vendor/google.golang.org/grpc/benchmark/client/main.go
new file mode 100644
index 00000000000..c63d521263a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/client/main.go
@@ -0,0 +1,162 @@
+package main
+
+import (
+	"flag"
+	"math"
+	"net"
+	"net/http"
+	_ "net/http/pprof"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/benchmark"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/benchmark/stats"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	server            = flag.String("server", "", "The server address")
+	maxConcurrentRPCs = flag.Int("max_concurrent_rpcs", 1, "The max number of concurrent RPCs")
+	duration          = flag.Int("duration", math.MaxInt32, "The duration in seconds to run the benchmark client")
+	trace             = flag.Bool("trace", true, "Whether tracing is on")
+	rpcType           = flag.Int("rpc_type", 0,
+		`Configure different client rpc type. Valid options are:
+		   0 : unary call;
+		   1 : streaming call.`)
+)
+
+func unaryCaller(client testpb.BenchmarkServiceClient) {
+	benchmark.DoUnaryCall(client, 1, 1)
+}
+
+func streamCaller(stream testpb.BenchmarkService_StreamingCallClient) {
+	benchmark.DoStreamingRoundTrip(stream, 1, 1)
+}
+
+func buildConnection() (s *stats.Stats, conn *grpc.ClientConn, tc testpb.BenchmarkServiceClient) {
+	s = stats.NewStats(256)
+	conn = benchmark.NewClientConn(*server)
+	tc = testpb.NewBenchmarkServiceClient(conn)
+	return s, conn, tc
+}
+
+func closeLoopUnary() {
+	s, conn, tc := buildConnection()
+
+	for i := 0; i < 100; i++ {
+		unaryCaller(tc)
+	}
+	ch := make(chan int, *maxConcurrentRPCs*4)
+	var (
+		mu sync.Mutex
+		wg sync.WaitGroup
+	)
+	wg.Add(*maxConcurrentRPCs)
+
+	for i := 0; i < *maxConcurrentRPCs; i++ {
+		go func() {
+			for range ch {
+				start := time.Now()
+				unaryCaller(tc)
+				elapse := time.Since(start)
+				mu.Lock()
+				s.Add(elapse)
+				mu.Unlock()
+			}
+			wg.Done()
+		}()
+	}
+	// Stop the client when time is up.
+	done := make(chan struct{})
+	go func() {
+		<-time.After(time.Duration(*duration) * time.Second)
+		close(done)
+	}()
+	ok := true
+	for ok {
+		select {
+		case ch <- 0:
+		case <-done:
+			ok = false
+		}
+	}
+	close(ch)
+	wg.Wait()
+	conn.Close()
+	grpclog.Println(s.String())
+
+}
+
+func closeLoopStream() {
+	s, conn, tc := buildConnection()
+	ch := make(chan int, *maxConcurrentRPCs*4)
+	var (
+		mu sync.Mutex
+		wg sync.WaitGroup
+	)
+	wg.Add(*maxConcurrentRPCs)
+	// Distribute RPCs over maxConcurrentCalls workers.
+	for i := 0; i < *maxConcurrentRPCs; i++ {
+		go func() {
+			stream, err := tc.StreamingCall(context.Background())
+			if err != nil {
+				grpclog.Fatalf("%v.StreamingCall(_) = _, %v", tc, err)
+			}
+			// Do some warm up.
+			for i := 0; i < 100; i++ {
+				streamCaller(stream)
+			}
+			for range ch {
+				start := time.Now()
+				streamCaller(stream)
+				elapse := time.Since(start)
+				mu.Lock()
+				s.Add(elapse)
+				mu.Unlock()
+			}
+			wg.Done()
+		}()
+	}
+	// Stop the client when time is up.
+	done := make(chan struct{})
+	go func() {
+		<-time.After(time.Duration(*duration) * time.Second)
+		close(done)
+	}()
+	ok := true
+	for ok {
+		select {
+		case ch <- 0:
+		case <-done:
+			ok = false
+		}
+	}
+	close(ch)
+	wg.Wait()
+	conn.Close()
+	grpclog.Println(s.String())
+}
+
+func main() {
+	flag.Parse()
+	grpc.EnableTracing = *trace
+	go func() {
+		lis, err := net.Listen("tcp", ":0")
+		if err != nil {
+			grpclog.Fatalf("Failed to listen: %v", err)
+		}
+		grpclog.Println("Client profiling address: ", lis.Addr().String())
+		if err := http.Serve(lis, nil); err != nil {
+			grpclog.Fatalf("Failed to serve: %v", err)
+		}
+	}()
+	switch *rpcType {
+	case 0:
+		closeLoopUnary()
+	case 1:
+		closeLoopStream()
+	}
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.pb.go b/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.pb.go
new file mode 100644
index 00000000000..8afae814544
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.pb.go
@@ -0,0 +1,977 @@
+// Code generated by protoc-gen-go.
+// source: control.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	control.proto
+	messages.proto
+	payloads.proto
+	services.proto
+	stats.proto
+
+It has these top-level messages:
+	PoissonParams
+	UniformParams
+	DeterministicParams
+	ParetoParams
+	ClosedLoopParams
+	LoadParams
+	SecurityParams
+	ClientConfig
+	ClientStatus
+	Mark
+	ClientArgs
+	ServerConfig
+	ServerArgs
+	ServerStatus
+	CoreRequest
+	CoreResponse
+	Void
+	Scenario
+	Scenarios
+	Payload
+	EchoStatus
+	SimpleRequest
+	SimpleResponse
+	StreamingInputCallRequest
+	StreamingInputCallResponse
+	ResponseParameters
+	StreamingOutputCallRequest
+	StreamingOutputCallResponse
+	ReconnectParams
+	ReconnectInfo
+	ByteBufferParams
+	SimpleProtoParams
+	ComplexProtoParams
+	PayloadConfig
+	ServerStats
+	HistogramParams
+	HistogramData
+	ClientStats
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type ClientType int32
+
+const (
+	ClientType_SYNC_CLIENT  ClientType = 0
+	ClientType_ASYNC_CLIENT ClientType = 1
+)
+
+var ClientType_name = map[int32]string{
+	0: "SYNC_CLIENT",
+	1: "ASYNC_CLIENT",
+}
+var ClientType_value = map[string]int32{
+	"SYNC_CLIENT":  0,
+	"ASYNC_CLIENT": 1,
+}
+
+func (x ClientType) String() string {
+	return proto.EnumName(ClientType_name, int32(x))
+}
+func (ClientType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type ServerType int32
+
+const (
+	ServerType_SYNC_SERVER          ServerType = 0
+	ServerType_ASYNC_SERVER         ServerType = 1
+	ServerType_ASYNC_GENERIC_SERVER ServerType = 2
+)
+
+var ServerType_name = map[int32]string{
+	0: "SYNC_SERVER",
+	1: "ASYNC_SERVER",
+	2: "ASYNC_GENERIC_SERVER",
+}
+var ServerType_value = map[string]int32{
+	"SYNC_SERVER":          0,
+	"ASYNC_SERVER":         1,
+	"ASYNC_GENERIC_SERVER": 2,
+}
+
+func (x ServerType) String() string {
+	return proto.EnumName(ServerType_name, int32(x))
+}
+func (ServerType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+type RpcType int32
+
+const (
+	RpcType_UNARY     RpcType = 0
+	RpcType_STREAMING RpcType = 1
+)
+
+var RpcType_name = map[int32]string{
+	0: "UNARY",
+	1: "STREAMING",
+}
+var RpcType_value = map[string]int32{
+	"UNARY":     0,
+	"STREAMING": 1,
+}
+
+func (x RpcType) String() string {
+	return proto.EnumName(RpcType_name, int32(x))
+}
+func (RpcType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+// Parameters of poisson process distribution, which is a good representation
+// of activity coming in from independent identical stationary sources.
+type PoissonParams struct {
+	// The rate of arrivals (a.k.a. lambda parameter of the exp distribution).
+	OfferedLoad float64 `protobuf:"fixed64,1,opt,name=offered_load,json=offeredLoad" json:"offered_load,omitempty"`
+}
+
+func (m *PoissonParams) Reset()                    { *m = PoissonParams{} }
+func (m *PoissonParams) String() string            { return proto.CompactTextString(m) }
+func (*PoissonParams) ProtoMessage()               {}
+func (*PoissonParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type UniformParams struct {
+	InterarrivalLo float64 `protobuf:"fixed64,1,opt,name=interarrival_lo,json=interarrivalLo" json:"interarrival_lo,omitempty"`
+	InterarrivalHi float64 `protobuf:"fixed64,2,opt,name=interarrival_hi,json=interarrivalHi" json:"interarrival_hi,omitempty"`
+}
+
+func (m *UniformParams) Reset()                    { *m = UniformParams{} }
+func (m *UniformParams) String() string            { return proto.CompactTextString(m) }
+func (*UniformParams) ProtoMessage()               {}
+func (*UniformParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+type DeterministicParams struct {
+	OfferedLoad float64 `protobuf:"fixed64,1,opt,name=offered_load,json=offeredLoad" json:"offered_load,omitempty"`
+}
+
+func (m *DeterministicParams) Reset()                    { *m = DeterministicParams{} }
+func (m *DeterministicParams) String() string            { return proto.CompactTextString(m) }
+func (*DeterministicParams) ProtoMessage()               {}
+func (*DeterministicParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+type ParetoParams struct {
+	InterarrivalBase float64 `protobuf:"fixed64,1,opt,name=interarrival_base,json=interarrivalBase" json:"interarrival_base,omitempty"`
+	Alpha            float64 `protobuf:"fixed64,2,opt,name=alpha" json:"alpha,omitempty"`
+}
+
+func (m *ParetoParams) Reset()                    { *m = ParetoParams{} }
+func (m *ParetoParams) String() string            { return proto.CompactTextString(m) }
+func (*ParetoParams) ProtoMessage()               {}
+func (*ParetoParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+// Once an RPC finishes, immediately start a new one.
+// No configuration parameters needed.
+type ClosedLoopParams struct {
+}
+
+func (m *ClosedLoopParams) Reset()                    { *m = ClosedLoopParams{} }
+func (m *ClosedLoopParams) String() string            { return proto.CompactTextString(m) }
+func (*ClosedLoopParams) ProtoMessage()               {}
+func (*ClosedLoopParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+type LoadParams struct {
+	// Types that are valid to be assigned to Load:
+	//	*LoadParams_ClosedLoop
+	//	*LoadParams_Poisson
+	//	*LoadParams_Uniform
+	//	*LoadParams_Determ
+	//	*LoadParams_Pareto
+	Load isLoadParams_Load `protobuf_oneof:"load"`
+}
+
+func (m *LoadParams) Reset()                    { *m = LoadParams{} }
+func (m *LoadParams) String() string            { return proto.CompactTextString(m) }
+func (*LoadParams) ProtoMessage()               {}
+func (*LoadParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+type isLoadParams_Load interface {
+	isLoadParams_Load()
+}
+
+type LoadParams_ClosedLoop struct {
+	ClosedLoop *ClosedLoopParams `protobuf:"bytes,1,opt,name=closed_loop,json=closedLoop,oneof"`
+}
+type LoadParams_Poisson struct {
+	Poisson *PoissonParams `protobuf:"bytes,2,opt,name=poisson,oneof"`
+}
+type LoadParams_Uniform struct {
+	Uniform *UniformParams `protobuf:"bytes,3,opt,name=uniform,oneof"`
+}
+type LoadParams_Determ struct {
+	Determ *DeterministicParams `protobuf:"bytes,4,opt,name=determ,oneof"`
+}
+type LoadParams_Pareto struct {
+	Pareto *ParetoParams `protobuf:"bytes,5,opt,name=pareto,oneof"`
+}
+
+func (*LoadParams_ClosedLoop) isLoadParams_Load() {}
+func (*LoadParams_Poisson) isLoadParams_Load()    {}
+func (*LoadParams_Uniform) isLoadParams_Load()    {}
+func (*LoadParams_Determ) isLoadParams_Load()     {}
+func (*LoadParams_Pareto) isLoadParams_Load()     {}
+
+func (m *LoadParams) GetLoad() isLoadParams_Load {
+	if m != nil {
+		return m.Load
+	}
+	return nil
+}
+
+func (m *LoadParams) GetClosedLoop() *ClosedLoopParams {
+	if x, ok := m.GetLoad().(*LoadParams_ClosedLoop); ok {
+		return x.ClosedLoop
+	}
+	return nil
+}
+
+func (m *LoadParams) GetPoisson() *PoissonParams {
+	if x, ok := m.GetLoad().(*LoadParams_Poisson); ok {
+		return x.Poisson
+	}
+	return nil
+}
+
+func (m *LoadParams) GetUniform() *UniformParams {
+	if x, ok := m.GetLoad().(*LoadParams_Uniform); ok {
+		return x.Uniform
+	}
+	return nil
+}
+
+func (m *LoadParams) GetDeterm() *DeterministicParams {
+	if x, ok := m.GetLoad().(*LoadParams_Determ); ok {
+		return x.Determ
+	}
+	return nil
+}
+
+func (m *LoadParams) GetPareto() *ParetoParams {
+	if x, ok := m.GetLoad().(*LoadParams_Pareto); ok {
+		return x.Pareto
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*LoadParams) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _LoadParams_OneofMarshaler, _LoadParams_OneofUnmarshaler, _LoadParams_OneofSizer, []interface{}{
+		(*LoadParams_ClosedLoop)(nil),
+		(*LoadParams_Poisson)(nil),
+		(*LoadParams_Uniform)(nil),
+		(*LoadParams_Determ)(nil),
+		(*LoadParams_Pareto)(nil),
+	}
+}
+
+func _LoadParams_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*LoadParams)
+	// load
+	switch x := m.Load.(type) {
+	case *LoadParams_ClosedLoop:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ClosedLoop); err != nil {
+			return err
+		}
+	case *LoadParams_Poisson:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Poisson); err != nil {
+			return err
+		}
+	case *LoadParams_Uniform:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Uniform); err != nil {
+			return err
+		}
+	case *LoadParams_Determ:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Determ); err != nil {
+			return err
+		}
+	case *LoadParams_Pareto:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Pareto); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("LoadParams.Load has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _LoadParams_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*LoadParams)
+	switch tag {
+	case 1: // load.closed_loop
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ClosedLoopParams)
+		err := b.DecodeMessage(msg)
+		m.Load = &LoadParams_ClosedLoop{msg}
+		return true, err
+	case 2: // load.poisson
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(PoissonParams)
+		err := b.DecodeMessage(msg)
+		m.Load = &LoadParams_Poisson{msg}
+		return true, err
+	case 3: // load.uniform
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(UniformParams)
+		err := b.DecodeMessage(msg)
+		m.Load = &LoadParams_Uniform{msg}
+		return true, err
+	case 4: // load.determ
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(DeterministicParams)
+		err := b.DecodeMessage(msg)
+		m.Load = &LoadParams_Determ{msg}
+		return true, err
+	case 5: // load.pareto
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ParetoParams)
+		err := b.DecodeMessage(msg)
+		m.Load = &LoadParams_Pareto{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _LoadParams_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*LoadParams)
+	// load
+	switch x := m.Load.(type) {
+	case *LoadParams_ClosedLoop:
+		s := proto.Size(x.ClosedLoop)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadParams_Poisson:
+		s := proto.Size(x.Poisson)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadParams_Uniform:
+		s := proto.Size(x.Uniform)
+		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadParams_Determ:
+		s := proto.Size(x.Determ)
+		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadParams_Pareto:
+		s := proto.Size(x.Pareto)
+		n += proto.SizeVarint(5<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// presence of SecurityParams implies use of TLS
+type SecurityParams struct {
+	UseTestCa          bool   `protobuf:"varint,1,opt,name=use_test_ca,json=useTestCa" json:"use_test_ca,omitempty"`
+	ServerHostOverride string `protobuf:"bytes,2,opt,name=server_host_override,json=serverHostOverride" json:"server_host_override,omitempty"`
+}
+
+func (m *SecurityParams) Reset()                    { *m = SecurityParams{} }
+func (m *SecurityParams) String() string            { return proto.CompactTextString(m) }
+func (*SecurityParams) ProtoMessage()               {}
+func (*SecurityParams) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+type ClientConfig struct {
+	// List of targets to connect to. At least one target needs to be specified.
+	ServerTargets  []string        `protobuf:"bytes,1,rep,name=server_targets,json=serverTargets" json:"server_targets,omitempty"`
+	ClientType     ClientType      `protobuf:"varint,2,opt,name=client_type,json=clientType,enum=grpc.testing.ClientType" json:"client_type,omitempty"`
+	SecurityParams *SecurityParams `protobuf:"bytes,3,opt,name=security_params,json=securityParams" json:"security_params,omitempty"`
+	// How many concurrent RPCs to start for each channel.
+	// For synchronous client, use a separate thread for each outstanding RPC.
+	OutstandingRpcsPerChannel int32 `protobuf:"varint,4,opt,name=outstanding_rpcs_per_channel,json=outstandingRpcsPerChannel" json:"outstanding_rpcs_per_channel,omitempty"`
+	// Number of independent client channels to create.
+	// i-th channel will connect to server_target[i % server_targets.size()]
+	ClientChannels int32 `protobuf:"varint,5,opt,name=client_channels,json=clientChannels" json:"client_channels,omitempty"`
+	// Only for async client. Number of threads to use to start/manage RPCs.
+	AsyncClientThreads int32   `protobuf:"varint,7,opt,name=async_client_threads,json=asyncClientThreads" json:"async_client_threads,omitempty"`
+	RpcType            RpcType `protobuf:"varint,8,opt,name=rpc_type,json=rpcType,enum=grpc.testing.RpcType" json:"rpc_type,omitempty"`
+	// The requested load for the entire client (aggregated over all the threads).
+	LoadParams      *LoadParams      `protobuf:"bytes,10,opt,name=load_params,json=loadParams" json:"load_params,omitempty"`
+	PayloadConfig   *PayloadConfig   `protobuf:"bytes,11,opt,name=payload_config,json=payloadConfig" json:"payload_config,omitempty"`
+	HistogramParams *HistogramParams `protobuf:"bytes,12,opt,name=histogram_params,json=histogramParams" json:"histogram_params,omitempty"`
+	// Specify the cores we should run the client on, if desired
+	CoreList  []int32 `protobuf:"varint,13,rep,name=core_list,json=coreList" json:"core_list,omitempty"`
+	CoreLimit int32   `protobuf:"varint,14,opt,name=core_limit,json=coreLimit" json:"core_limit,omitempty"`
+}
+
+func (m *ClientConfig) Reset()                    { *m = ClientConfig{} }
+func (m *ClientConfig) String() string            { return proto.CompactTextString(m) }
+func (*ClientConfig) ProtoMessage()               {}
+func (*ClientConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *ClientConfig) GetSecurityParams() *SecurityParams {
+	if m != nil {
+		return m.SecurityParams
+	}
+	return nil
+}
+
+func (m *ClientConfig) GetLoadParams() *LoadParams {
+	if m != nil {
+		return m.LoadParams
+	}
+	return nil
+}
+
+func (m *ClientConfig) GetPayloadConfig() *PayloadConfig {
+	if m != nil {
+		return m.PayloadConfig
+	}
+	return nil
+}
+
+func (m *ClientConfig) GetHistogramParams() *HistogramParams {
+	if m != nil {
+		return m.HistogramParams
+	}
+	return nil
+}
+
+type ClientStatus struct {
+	Stats *ClientStats `protobuf:"bytes,1,opt,name=stats" json:"stats,omitempty"`
+}
+
+func (m *ClientStatus) Reset()                    { *m = ClientStatus{} }
+func (m *ClientStatus) String() string            { return proto.CompactTextString(m) }
+func (*ClientStatus) ProtoMessage()               {}
+func (*ClientStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+func (m *ClientStatus) GetStats() *ClientStats {
+	if m != nil {
+		return m.Stats
+	}
+	return nil
+}
+
+// Request current stats
+type Mark struct {
+	// if true, the stats will be reset after taking their snapshot.
+	Reset_ bool `protobuf:"varint,1,opt,name=reset" json:"reset,omitempty"`
+}
+
+func (m *Mark) Reset()                    { *m = Mark{} }
+func (m *Mark) String() string            { return proto.CompactTextString(m) }
+func (*Mark) ProtoMessage()               {}
+func (*Mark) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+
+type ClientArgs struct {
+	// Types that are valid to be assigned to Argtype:
+	//	*ClientArgs_Setup
+	//	*ClientArgs_Mark
+	Argtype isClientArgs_Argtype `protobuf_oneof:"argtype"`
+}
+
+func (m *ClientArgs) Reset()                    { *m = ClientArgs{} }
+func (m *ClientArgs) String() string            { return proto.CompactTextString(m) }
+func (*ClientArgs) ProtoMessage()               {}
+func (*ClientArgs) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+
+type isClientArgs_Argtype interface {
+	isClientArgs_Argtype()
+}
+
+type ClientArgs_Setup struct {
+	Setup *ClientConfig `protobuf:"bytes,1,opt,name=setup,oneof"`
+}
+type ClientArgs_Mark struct {
+	Mark *Mark `protobuf:"bytes,2,opt,name=mark,oneof"`
+}
+
+func (*ClientArgs_Setup) isClientArgs_Argtype() {}
+func (*ClientArgs_Mark) isClientArgs_Argtype()  {}
+
+func (m *ClientArgs) GetArgtype() isClientArgs_Argtype {
+	if m != nil {
+		return m.Argtype
+	}
+	return nil
+}
+
+func (m *ClientArgs) GetSetup() *ClientConfig {
+	if x, ok := m.GetArgtype().(*ClientArgs_Setup); ok {
+		return x.Setup
+	}
+	return nil
+}
+
+func (m *ClientArgs) GetMark() *Mark {
+	if x, ok := m.GetArgtype().(*ClientArgs_Mark); ok {
+		return x.Mark
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ClientArgs) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ClientArgs_OneofMarshaler, _ClientArgs_OneofUnmarshaler, _ClientArgs_OneofSizer, []interface{}{
+		(*ClientArgs_Setup)(nil),
+		(*ClientArgs_Mark)(nil),
+	}
+}
+
+func _ClientArgs_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ClientArgs)
+	// argtype
+	switch x := m.Argtype.(type) {
+	case *ClientArgs_Setup:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Setup); err != nil {
+			return err
+		}
+	case *ClientArgs_Mark:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Mark); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("ClientArgs.Argtype has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ClientArgs_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ClientArgs)
+	switch tag {
+	case 1: // argtype.setup
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ClientConfig)
+		err := b.DecodeMessage(msg)
+		m.Argtype = &ClientArgs_Setup{msg}
+		return true, err
+	case 2: // argtype.mark
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(Mark)
+		err := b.DecodeMessage(msg)
+		m.Argtype = &ClientArgs_Mark{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ClientArgs_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ClientArgs)
+	// argtype
+	switch x := m.Argtype.(type) {
+	case *ClientArgs_Setup:
+		s := proto.Size(x.Setup)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ClientArgs_Mark:
+		s := proto.Size(x.Mark)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type ServerConfig struct {
+	ServerType     ServerType      `protobuf:"varint,1,opt,name=server_type,json=serverType,enum=grpc.testing.ServerType" json:"server_type,omitempty"`
+	SecurityParams *SecurityParams `protobuf:"bytes,2,opt,name=security_params,json=securityParams" json:"security_params,omitempty"`
+	// Port on which to listen. Zero means pick unused port.
+	Port int32 `protobuf:"varint,4,opt,name=port" json:"port,omitempty"`
+	// Only for async server. Number of threads used to serve the requests.
+	AsyncServerThreads int32 `protobuf:"varint,7,opt,name=async_server_threads,json=asyncServerThreads" json:"async_server_threads,omitempty"`
+	// Specify the number of cores to limit server to, if desired
+	CoreLimit int32 `protobuf:"varint,8,opt,name=core_limit,json=coreLimit" json:"core_limit,omitempty"`
+	// payload config, used in generic server
+	PayloadConfig *PayloadConfig `protobuf:"bytes,9,opt,name=payload_config,json=payloadConfig" json:"payload_config,omitempty"`
+	// Specify the cores we should run the server on, if desired
+	CoreList []int32 `protobuf:"varint,10,rep,name=core_list,json=coreList" json:"core_list,omitempty"`
+}
+
+func (m *ServerConfig) Reset()                    { *m = ServerConfig{} }
+func (m *ServerConfig) String() string            { return proto.CompactTextString(m) }
+func (*ServerConfig) ProtoMessage()               {}
+func (*ServerConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
+
+func (m *ServerConfig) GetSecurityParams() *SecurityParams {
+	if m != nil {
+		return m.SecurityParams
+	}
+	return nil
+}
+
+func (m *ServerConfig) GetPayloadConfig() *PayloadConfig {
+	if m != nil {
+		return m.PayloadConfig
+	}
+	return nil
+}
+
+type ServerArgs struct {
+	// Types that are valid to be assigned to Argtype:
+	//	*ServerArgs_Setup
+	//	*ServerArgs_Mark
+	Argtype isServerArgs_Argtype `protobuf_oneof:"argtype"`
+}
+
+func (m *ServerArgs) Reset()                    { *m = ServerArgs{} }
+func (m *ServerArgs) String() string            { return proto.CompactTextString(m) }
+func (*ServerArgs) ProtoMessage()               {}
+func (*ServerArgs) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
+
+type isServerArgs_Argtype interface {
+	isServerArgs_Argtype()
+}
+
+type ServerArgs_Setup struct {
+	Setup *ServerConfig `protobuf:"bytes,1,opt,name=setup,oneof"`
+}
+type ServerArgs_Mark struct {
+	Mark *Mark `protobuf:"bytes,2,opt,name=mark,oneof"`
+}
+
+func (*ServerArgs_Setup) isServerArgs_Argtype() {}
+func (*ServerArgs_Mark) isServerArgs_Argtype()  {}
+
+func (m *ServerArgs) GetArgtype() isServerArgs_Argtype {
+	if m != nil {
+		return m.Argtype
+	}
+	return nil
+}
+
+func (m *ServerArgs) GetSetup() *ServerConfig {
+	if x, ok := m.GetArgtype().(*ServerArgs_Setup); ok {
+		return x.Setup
+	}
+	return nil
+}
+
+func (m *ServerArgs) GetMark() *Mark {
+	if x, ok := m.GetArgtype().(*ServerArgs_Mark); ok {
+		return x.Mark
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ServerArgs) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ServerArgs_OneofMarshaler, _ServerArgs_OneofUnmarshaler, _ServerArgs_OneofSizer, []interface{}{
+		(*ServerArgs_Setup)(nil),
+		(*ServerArgs_Mark)(nil),
+	}
+}
+
+func _ServerArgs_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ServerArgs)
+	// argtype
+	switch x := m.Argtype.(type) {
+	case *ServerArgs_Setup:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Setup); err != nil {
+			return err
+		}
+	case *ServerArgs_Mark:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.Mark); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("ServerArgs.Argtype has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ServerArgs_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ServerArgs)
+	switch tag {
+	case 1: // argtype.setup
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ServerConfig)
+		err := b.DecodeMessage(msg)
+		m.Argtype = &ServerArgs_Setup{msg}
+		return true, err
+	case 2: // argtype.mark
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(Mark)
+		err := b.DecodeMessage(msg)
+		m.Argtype = &ServerArgs_Mark{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ServerArgs_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ServerArgs)
+	// argtype
+	switch x := m.Argtype.(type) {
+	case *ServerArgs_Setup:
+		s := proto.Size(x.Setup)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerArgs_Mark:
+		s := proto.Size(x.Mark)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type ServerStatus struct {
+	Stats *ServerStats `protobuf:"bytes,1,opt,name=stats" json:"stats,omitempty"`
+	// the port bound by the server
+	Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
+	// Number of cores available to the server
+	Cores int32 `protobuf:"varint,3,opt,name=cores" json:"cores,omitempty"`
+}
+
+func (m *ServerStatus) Reset()                    { *m = ServerStatus{} }
+func (m *ServerStatus) String() string            { return proto.CompactTextString(m) }
+func (*ServerStatus) ProtoMessage()               {}
+func (*ServerStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} }
+
+func (m *ServerStatus) GetStats() *ServerStats {
+	if m != nil {
+		return m.Stats
+	}
+	return nil
+}
+
+type CoreRequest struct {
+}
+
+func (m *CoreRequest) Reset()                    { *m = CoreRequest{} }
+func (m *CoreRequest) String() string            { return proto.CompactTextString(m) }
+func (*CoreRequest) ProtoMessage()               {}
+func (*CoreRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} }
+
+type CoreResponse struct {
+	// Number of cores available on the server
+	Cores int32 `protobuf:"varint,1,opt,name=cores" json:"cores,omitempty"`
+}
+
+func (m *CoreResponse) Reset()                    { *m = CoreResponse{} }
+func (m *CoreResponse) String() string            { return proto.CompactTextString(m) }
+func (*CoreResponse) ProtoMessage()               {}
+func (*CoreResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} }
+
+type Void struct {
+}
+
+func (m *Void) Reset()                    { *m = Void{} }
+func (m *Void) String() string            { return proto.CompactTextString(m) }
+func (*Void) ProtoMessage()               {}
+func (*Void) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} }
+
+// A single performance scenario: input to qps_json_driver
+type Scenario struct {
+	// Human readable name for this scenario
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Client configuration
+	ClientConfig *ClientConfig `protobuf:"bytes,2,opt,name=client_config,json=clientConfig" json:"client_config,omitempty"`
+	// Number of clients to start for the test
+	NumClients int32 `protobuf:"varint,3,opt,name=num_clients,json=numClients" json:"num_clients,omitempty"`
+	// Server configuration
+	ServerConfig *ServerConfig `protobuf:"bytes,4,opt,name=server_config,json=serverConfig" json:"server_config,omitempty"`
+	// Number of servers to start for the test
+	NumServers int32 `protobuf:"varint,5,opt,name=num_servers,json=numServers" json:"num_servers,omitempty"`
+	// Warmup period, in seconds
+	WarmupSeconds int32 `protobuf:"varint,6,opt,name=warmup_seconds,json=warmupSeconds" json:"warmup_seconds,omitempty"`
+	// Benchmark time, in seconds
+	BenchmarkSeconds int32 `protobuf:"varint,7,opt,name=benchmark_seconds,json=benchmarkSeconds" json:"benchmark_seconds,omitempty"`
+	// Number of workers to spawn locally (usually zero)
+	SpawnLocalWorkerCount int32 `protobuf:"varint,8,opt,name=spawn_local_worker_count,json=spawnLocalWorkerCount" json:"spawn_local_worker_count,omitempty"`
+}
+
+func (m *Scenario) Reset()                    { *m = Scenario{} }
+func (m *Scenario) String() string            { return proto.CompactTextString(m) }
+func (*Scenario) ProtoMessage()               {}
+func (*Scenario) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} }
+
+func (m *Scenario) GetClientConfig() *ClientConfig {
+	if m != nil {
+		return m.ClientConfig
+	}
+	return nil
+}
+
+func (m *Scenario) GetServerConfig() *ServerConfig {
+	if m != nil {
+		return m.ServerConfig
+	}
+	return nil
+}
+
+// A set of scenarios to be run with qps_json_driver
+type Scenarios struct {
+	Scenarios []*Scenario `protobuf:"bytes,1,rep,name=scenarios" json:"scenarios,omitempty"`
+}
+
+func (m *Scenarios) Reset()                    { *m = Scenarios{} }
+func (m *Scenarios) String() string            { return proto.CompactTextString(m) }
+func (*Scenarios) ProtoMessage()               {}
+func (*Scenarios) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
+
+func (m *Scenarios) GetScenarios() []*Scenario {
+	if m != nil {
+		return m.Scenarios
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*PoissonParams)(nil), "grpc.testing.PoissonParams")
+	proto.RegisterType((*UniformParams)(nil), "grpc.testing.UniformParams")
+	proto.RegisterType((*DeterministicParams)(nil), "grpc.testing.DeterministicParams")
+	proto.RegisterType((*ParetoParams)(nil), "grpc.testing.ParetoParams")
+	proto.RegisterType((*ClosedLoopParams)(nil), "grpc.testing.ClosedLoopParams")
+	proto.RegisterType((*LoadParams)(nil), "grpc.testing.LoadParams")
+	proto.RegisterType((*SecurityParams)(nil), "grpc.testing.SecurityParams")
+	proto.RegisterType((*ClientConfig)(nil), "grpc.testing.ClientConfig")
+	proto.RegisterType((*ClientStatus)(nil), "grpc.testing.ClientStatus")
+	proto.RegisterType((*Mark)(nil), "grpc.testing.Mark")
+	proto.RegisterType((*ClientArgs)(nil), "grpc.testing.ClientArgs")
+	proto.RegisterType((*ServerConfig)(nil), "grpc.testing.ServerConfig")
+	proto.RegisterType((*ServerArgs)(nil), "grpc.testing.ServerArgs")
+	proto.RegisterType((*ServerStatus)(nil), "grpc.testing.ServerStatus")
+	proto.RegisterType((*CoreRequest)(nil), "grpc.testing.CoreRequest")
+	proto.RegisterType((*CoreResponse)(nil), "grpc.testing.CoreResponse")
+	proto.RegisterType((*Void)(nil), "grpc.testing.Void")
+	proto.RegisterType((*Scenario)(nil), "grpc.testing.Scenario")
+	proto.RegisterType((*Scenarios)(nil), "grpc.testing.Scenarios")
+	proto.RegisterEnum("grpc.testing.ClientType", ClientType_name, ClientType_value)
+	proto.RegisterEnum("grpc.testing.ServerType", ServerType_name, ServerType_value)
+	proto.RegisterEnum("grpc.testing.RpcType", RpcType_name, RpcType_value)
+}
+
+func init() { proto.RegisterFile("control.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 1162 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xa4, 0x56, 0xdd, 0x6e, 0xdb, 0x46,
+	0x13, 0x8d, 0x14, 0xc9, 0x96, 0x86, 0x92, 0xac, 0x6f, 0xbf, 0xa4, 0x60, 0x1c, 0x27, 0x6d, 0xd8,
+	0x16, 0x0d, 0x5c, 0xc0, 0x29, 0xd4, 0x02, 0x69, 0xd1, 0x8b, 0x40, 0x56, 0x85, 0xd8, 0x80, 0xe3,
+	0xba, 0x2b, 0x27, 0x45, 0xae, 0x08, 0x9a, 0x5a, 0x4b, 0x44, 0x24, 0x2e, 0xbb, 0x4b, 0xc6, 0xf0,
+	0x2b, 0xf4, 0x99, 0xfa, 0x1c, 0x7d, 0x8d, 0xbe, 0x42, 0x67, 0xff, 0x64, 0x52, 0x11, 0x10, 0xb7,
+	0xbd, 0xe3, 0xce, 0x9c, 0xb3, 0x3b, 0x3b, 0x67, 0x66, 0x96, 0xd0, 0x8d, 0x79, 0x9a, 0x0b, 0xbe,
+	0x38, 0xc8, 0x04, 0xcf, 0x39, 0xe9, 0xcc, 0x44, 0x16, 0x1f, 0xe4, 0x4c, 0xe6, 0x49, 0x3a, 0xdb,
+	0xed, 0x65, 0xd1, 0xf5, 0x82, 0x47, 0x53, 0x69, 0xbc, 0xbb, 0x9e, 0xcc, 0xa3, 0xdc, 0x2e, 0x82,
+	0x01, 0x74, 0xcf, 0x78, 0x22, 0x25, 0x4f, 0xcf, 0x22, 0x11, 0x2d, 0x25, 0x79, 0x02, 0x1d, 0x7e,
+	0x79, 0xc9, 0x04, 0x9b, 0x86, 0x8a, 0xe4, 0xd7, 0x3e, 0xab, 0x3d, 0xad, 0x51, 0xcf, 0xda, 0x4e,
+	0xd0, 0x14, 0x44, 0xd0, 0x7d, 0x9d, 0x26, 0x97, 0x5c, 0x2c, 0x2d, 0xe7, 0x2b, 0xd8, 0x49, 0xd2,
+	0x9c, 0x89, 0x48, 0x88, 0xe4, 0x7d, 0xb4, 0x40, 0xa2, 0xa5, 0xf5, 0xca, 0xe6, 0x13, 0xfe, 0x01,
+	0x70, 0x9e, 0xf8, 0xf5, 0x0f, 0x81, 0x47, 0x49, 0xf0, 0x3d, 0xfc, 0xff, 0x27, 0x86, 0x96, 0x65,
+	0x92, 0x26, 0x78, 0x8b, 0xf8, 0xf6, 0xc1, 0xfd, 0x02, 0x1d, 0x04, 0xb3, 0x9c, 0x5b, 0xca, 0xd7,
+	0xf0, 0xbf, 0xca, 0x91, 0x17, 0x91, 0x64, 0x96, 0xd7, 0x2f, 0x3b, 0x0e, 0xd1, 0x4e, 0xee, 0x41,
+	0x33, 0x5a, 0x64, 0xf3, 0xc8, 0x46, 0x65, 0x16, 0x01, 0x81, 0xfe, 0x68, 0xc1, 0xa5, 0x3a, 0x80,
+	0x67, 0x66, 0xdb, 0xe0, 0x8f, 0x3a, 0x80, 0x3a, 0xcf, 0x9e, 0x32, 0x04, 0x2f, 0xd6, 0x10, 0x8c,
+	0x8b, 0x67, 0x7a, 0x7f, 0x6f, 0xf0, 0xf8, 0xa0, 0xac, 0xc3, 0xc1, 0xfa, 0x1e, 0x47, 0x77, 0x28,
+	0xc4, 0x2b, 0x1b, 0x79, 0x0e, 0xdb, 0x99, 0x51, 0x42, 0x9f, 0xee, 0x0d, 0x1e, 0x56, 0xe9, 0x15,
+	0x99, 0x90, 0xeb, 0xd0, 0x8a, 0x58, 0x18, 0x39, 0xfc, 0xbb, 0x9b, 0x88, 0x15, 0xad, 0x14, 0xd1,
+	0xa2, 0xc9, 0x8f, 0xb0, 0x35, 0xd5, 0x49, 0xf6, 0x1b, 0x9a, 0xf7, 0xa4, 0xca, 0xdb, 0x20, 0x00,
+	0xb2, 0x2d, 0x85, 0x7c, 0x07, 0x5b, 0x99, 0xce, 0xb3, 0xdf, 0xd4, 0xe4, 0xdd, 0xb5, 0x68, 0x4b,
+	0x1a, 0x28, 0x96, 0xc1, 0x1e, 0x6e, 0x41, 0x43, 0x09, 0x17, 0x5c, 0x40, 0x6f, 0xc2, 0xe2, 0x42,
+	0x24, 0xf9, 0xb5, 0xcd, 0xe0, 0x63, 0xf0, 0x0a, 0xc9, 0x42, 0xc5, 0x0f, 0xe3, 0x48, 0x67, 0xb0,
+	0x45, 0xdb, 0x68, 0x3a, 0x47, 0xcb, 0x28, 0x22, 0xdf, 0xc0, 0x3d, 0xc9, 0xc4, 0x7b, 0x26, 0xc2,
+	0x39, 0x47, 0x08, 0xc7, 0x2f, 0x91, 0x4c, 0x99, 0xce, 0x55, 0x9b, 0x12, 0xe3, 0x3b, 0x42, 0xd7,
+	0xcf, 0xd6, 0x13, 0xfc, 0xde, 0x84, 0xce, 0x68, 0x91, 0xb0, 0x34, 0x1f, 0xf1, 0xf4, 0x32, 0x99,
+	0x91, 0x2f, 0xa1, 0x67, 0xb7, 0xc8, 0x23, 0x31, 0x63, 0xb9, 0xc4, 0x53, 0xee, 0x22, 0xb9, 0x6b,
+	0xac, 0xe7, 0xc6, 0x48, 0x7e, 0x50, 0x5a, 0x2a, 0x5a, 0x98, 0x5f, 0x67, 0xe6, 0x80, 0xde, 0xc0,
+	0x5f, 0xd7, 0x52, 0x01, 0xce, 0xd1, 0xaf, 0x34, 0x74, 0xdf, 0x64, 0x0c, 0x3b, 0xd2, 0x5e, 0x2b,
+	0xcc, 0xf4, 0xbd, 0xac, 0x24, 0x7b, 0x55, 0x7a, 0xf5, 0xee, 0xb4, 0x27, 0xab, 0xb9, 0x78, 0x01,
+	0x7b, 0xbc, 0xc8, 0xb1, 0x4d, 0xd3, 0x29, 0xa2, 0x43, 0x64, 0xca, 0x30, 0xc3, 0xb0, 0xe3, 0x79,
+	0x94, 0xa6, 0x6c, 0xa1, 0xe5, 0x6a, 0xd2, 0x07, 0x25, 0x0c, 0x45, 0xc8, 0x19, 0x13, 0x23, 0x03,
+	0x50, 0x7d, 0x66, 0xaf, 0x60, 0x29, 0x52, 0xab, 0xd4, 0xa4, 0x3d, 0x63, 0xb6, 0x38, 0xa9, 0xb2,
+	0x1a, 0xc9, 0xeb, 0x34, 0x0e, 0xdd, 0x8d, 0xe7, 0x82, 0xe1, 0xa4, 0xf0, 0xb7, 0x35, 0x9a, 0x68,
+	0x9f, 0xbd, 0xab, 0xf1, 0x20, 0xa3, 0x85, 0xf1, 0x98, 0xd4, 0xb4, 0x74, 0x6a, 0xee, 0x57, 0xef,
+	0x86, 0xa1, 0xe8, 0xbc, 0x6c, 0x0b, 0xf3, 0xa1, 0xf2, 0xa9, 0x34, 0x77, 0x09, 0x01, 0x9d, 0x90,
+	0xb5, 0x7c, 0xde, 0xb4, 0x12, 0x85, 0xc5, 0x4d, 0x5b, 0x1d, 0x82, 0x1b, 0x5e, 0x61, 0xac, 0x35,
+	0xf4, 0xbd, 0x8d, 0xad, 0x61, 0x30, 0x46, 0x66, 0xda, 0xcd, 0xca, 0x4b, 0x72, 0x04, 0xfd, 0x39,
+	0x96, 0x30, 0x9f, 0xe1, 0x8e, 0x2e, 0x86, 0x8e, 0xde, 0xe5, 0x51, 0x75, 0x97, 0x23, 0x87, 0xb2,
+	0x81, 0xec, 0xcc, 0xab, 0x06, 0xf2, 0x10, 0xda, 0x31, 0x17, 0x2c, 0x5c, 0xa0, 0xdd, 0xef, 0x62,
+	0xe9, 0x34, 0x69, 0x4b, 0x19, 0x4e, 0x70, 0x4d, 0x1e, 0x01, 0x58, 0xe7, 0x32, 0xc9, 0xfd, 0x9e,
+	0xce, 0x5f, 0xdb, 0x78, 0xd1, 0x10, 0xbc, 0x70, 0xb5, 0x38, 0xc1, 0xe1, 0x5b, 0x48, 0xf2, 0x0c,
+	0x9a, 0x7a, 0x0c, 0xdb, 0x51, 0xf1, 0x60, 0x53, 0x79, 0x29, 0xa8, 0xa4, 0x06, 0x17, 0xec, 0x41,
+	0xe3, 0x55, 0x24, 0xde, 0xa9, 0x11, 0x25, 0x98, 0x64, 0xb9, 0xed, 0x10, 0xb3, 0x08, 0x0a, 0x00,
+	0xc3, 0x19, 0x8a, 0x99, 0x24, 0x03, 0xdc, 0x9c, 0xe5, 0x85, 0x9b, 0x43, 0xbb, 0x9b, 0x36, 0x37,
+	0xd9, 0xc1, 0xd6, 0x34, 0x50, 0xf2, 0x14, 0x1a, 0x4b, 0xdc, 0xdf, 0xce, 0x1e, 0x52, 0xa5, 0xa8,
+	0x93, 0x11, 0xaa, 0x11, 0x87, 0x6d, 0xd8, 0xc6, 0x4e, 0x51, 0x05, 0x10, 0xfc, 0x59, 0x87, 0xce,
+	0x44, 0x37, 0x8f, 0x4d, 0x36, 0x6a, 0xed, 0x5a, 0x4c, 0x15, 0x48, 0x6d, 0x53, 0xef, 0x18, 0x82,
+	0xe9, 0x1d, 0xb9, 0xfa, 0xde, 0xd4, 0x3b, 0xf5, 0x7f, 0xd1, 0x3b, 0x04, 0x1a, 0x19, 0x17, 0xb9,
+	0xed, 0x11, 0xfd, 0x7d, 0x53, 0xe5, 0x2e, 0xb6, 0x0d, 0x55, 0x6e, 0xa3, 0xb2, 0x55, 0x5e, 0x55,
+	0xb3, 0xb5, 0xa6, 0xe6, 0x86, 0xba, 0x6c, 0xff, 0xe3, 0xba, 0xac, 0x54, 0x13, 0x54, 0xab, 0x49,
+	0xe9, 0x69, 0x02, 0xba, 0x85, 0x9e, 0x65, 0x01, 0xfe, 0xa3, 0x9e, 0x89, 0x93, 0xf3, 0x56, 0x55,
+	0x7a, 0x03, 0x75, 0x55, 0xba, 0xca, 0x7e, 0xbd, 0x94, 0x7d, 0xac, 0x58, 0x75, 0x2f, 0x33, 0x0a,
+	0x9b, 0xd4, 0x2c, 0x82, 0x2e, 0x78, 0x23, 0xfc, 0xa0, 0xec, 0xb7, 0x02, 0xb7, 0x0b, 0xbe, 0xc0,
+	0xfe, 0xd0, 0x4b, 0x99, 0xf1, 0xd4, 0xbc, 0xc4, 0x86, 0x54, 0x2b, 0x93, 0xf0, 0xf9, 0x78, 0xc3,
+	0x93, 0x69, 0xf0, 0x57, 0x1d, 0x5a, 0x93, 0x98, 0xa5, 0x91, 0x48, 0xb8, 0x3a, 0x33, 0x8d, 0x96,
+	0xa6, 0xd8, 0xda, 0x54, 0x7f, 0xe3, 0x04, 0xed, 0xba, 0x01, 0x68, 0xf4, 0xa9, 0x7f, 0xac, 0x13,
+	0x68, 0x27, 0x2e, 0xbf, 0x15, 0x9f, 0x82, 0x97, 0x16, 0x4b, 0x3b, 0x16, 0x5d, 0xe8, 0x80, 0x26,
+	0xc3, 0x51, 0x33, 0xda, 0x3e, 0x1b, 0xee, 0x84, 0xc6, 0xc7, 0xb4, 0xa1, 0x1d, 0x59, 0x6e, 0x15,
+	0x7b, 0x82, 0xb1, 0xb9, 0xf9, 0xac, 0x4e, 0x30, 0x1c, 0xa9, 0x9e, 0xab, 0xab, 0x48, 0x2c, 0x8b,
+	0x0c, 0x31, 0x78, 0x06, 0xd6, 0xeb, 0x96, 0xc6, 0x74, 0x8d, 0x75, 0x62, 0x8c, 0xea, 0x07, 0xe7,
+	0x82, 0xa5, 0xf1, 0x5c, 0x69, 0xb9, 0x42, 0x9a, 0xca, 0xee, 0xaf, 0x1c, 0x0e, 0xfc, 0x1c, 0x7c,
+	0x99, 0x45, 0x57, 0x29, 0xfe, 0xa6, 0xc4, 0xf8, 0x33, 0x74, 0xc5, 0xc5, 0x3b, 0x7d, 0x83, 0x22,
+	0x75, 0x55, 0x7e, 0x5f, 0xfb, 0x4f, 0x94, 0xfb, 0x57, 0xed, 0x1d, 0x29, 0x67, 0x30, 0x84, 0xb6,
+	0x4b, 0xb8, 0xc4, 0xb7, 0xbf, 0x2d, 0xdd, 0x42, 0xbf, 0xa1, 0xde, 0xe0, 0x93, 0xb5, 0x7b, 0x5b,
+	0x37, 0xbd, 0x01, 0xee, 0x3f, 0x73, 0x33, 0x4a, 0xb7, 0xfb, 0x0e, 0x78, 0x93, 0xb7, 0xa7, 0xa3,
+	0x70, 0x74, 0x72, 0x3c, 0x3e, 0x3d, 0xef, 0xdf, 0x21, 0x7d, 0xe8, 0x0c, 0xcb, 0x96, 0xda, 0xfe,
+	0xb1, 0x6b, 0x82, 0x0a, 0x61, 0x32, 0xa6, 0x6f, 0xc6, 0xb4, 0x4c, 0xb0, 0x96, 0x1a, 0xf1, 0xe1,
+	0x9e, 0xb1, 0xbc, 0x1c, 0x9f, 0x8e, 0xe9, 0xf1, 0xca, 0x53, 0xdf, 0xff, 0x1c, 0xb6, 0xed, 0xbb,
+	0x44, 0xda, 0xd0, 0x7c, 0x7d, 0x3a, 0xa4, 0x6f, 0x71, 0x87, 0x2e, 0x5e, 0xea, 0x9c, 0x8e, 0x87,
+	0xaf, 0x8e, 0x4f, 0x5f, 0xf6, 0x6b, 0x17, 0x5b, 0xfa, 0x97, 0xf8, 0xdb, 0xbf, 0x03, 0x00, 0x00,
+	0xff, 0xff, 0x75, 0x59, 0xf4, 0x03, 0x4e, 0x0b, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.proto b/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.proto
new file mode 100644
index 00000000000..e0fe0ec728f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/control.proto
@@ -0,0 +1,201 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+import "payloads.proto";
+import "stats.proto";
+
+package grpc.testing;
+
+enum ClientType {
+  SYNC_CLIENT = 0;
+  ASYNC_CLIENT = 1;
+}
+
+enum ServerType {
+  SYNC_SERVER = 0;
+  ASYNC_SERVER = 1;
+  ASYNC_GENERIC_SERVER = 2;
+}
+
+enum RpcType {
+  UNARY = 0;
+  STREAMING = 1;
+}
+
+// Parameters of poisson process distribution, which is a good representation
+// of activity coming in from independent identical stationary sources.
+message PoissonParams {
+  // The rate of arrivals (a.k.a. lambda parameter of the exp distribution).
+  double offered_load = 1;
+}
+
+message UniformParams {
+  double interarrival_lo = 1;
+  double interarrival_hi = 2;
+}
+
+message DeterministicParams {
+  double offered_load = 1;
+}
+
+message ParetoParams {
+  double interarrival_base = 1;
+  double alpha = 2;
+}
+
+// Once an RPC finishes, immediately start a new one.
+// No configuration parameters needed.
+message ClosedLoopParams {
+}
+
+message LoadParams {
+  oneof load {
+    ClosedLoopParams closed_loop = 1;
+    PoissonParams poisson = 2;
+    UniformParams uniform = 3;
+    DeterministicParams determ = 4;
+    ParetoParams pareto = 5;
+  };
+}
+
+// presence of SecurityParams implies use of TLS
+message SecurityParams {
+  bool use_test_ca = 1;
+  string server_host_override = 2;
+}
+
+message ClientConfig {
+  // List of targets to connect to. At least one target needs to be specified.
+  repeated string server_targets = 1;
+  ClientType client_type = 2;
+  SecurityParams security_params = 3;
+  // How many concurrent RPCs to start for each channel.
+  // For synchronous client, use a separate thread for each outstanding RPC.
+  int32 outstanding_rpcs_per_channel = 4;
+  // Number of independent client channels to create.
+  // i-th channel will connect to server_target[i % server_targets.size()]
+  int32 client_channels = 5;
+  // Only for async client. Number of threads to use to start/manage RPCs.
+  int32 async_client_threads = 7;
+  RpcType rpc_type = 8;
+  // The requested load for the entire client (aggregated over all the threads).
+  LoadParams load_params = 10;
+  PayloadConfig payload_config = 11;
+  HistogramParams histogram_params = 12;
+
+  // Specify the cores we should run the client on, if desired
+  repeated int32 core_list = 13;
+  int32 core_limit = 14;
+}
+
+message ClientStatus {
+  ClientStats stats = 1;
+}
+
+// Request current stats
+message Mark {
+  // if true, the stats will be reset after taking their snapshot.
+  bool reset = 1;
+}
+
+message ClientArgs {
+  oneof argtype {
+    ClientConfig setup = 1;
+    Mark mark = 2;
+  }
+}
+
+message ServerConfig {
+  ServerType server_type = 1;
+  SecurityParams security_params = 2;
+  // Port on which to listen. Zero means pick unused port.
+  int32 port = 4;
+  // Only for async server. Number of threads used to serve the requests.
+  int32 async_server_threads = 7;
+  // Specify the number of cores to limit server to, if desired
+  int32 core_limit = 8;
+  // payload config, used in generic server
+  PayloadConfig payload_config = 9;
+
+  // Specify the cores we should run the server on, if desired
+  repeated int32 core_list = 10;
+}
+
+message ServerArgs {
+  oneof argtype {
+    ServerConfig setup = 1;
+    Mark mark = 2;
+  }
+}
+
+message ServerStatus {
+  ServerStats stats = 1;
+  // the port bound by the server
+  int32 port = 2;
+  // Number of cores available to the server
+  int32 cores = 3;
+}
+
+message CoreRequest {
+}
+
+message CoreResponse {
+  // Number of cores available on the server
+  int32 cores = 1;
+}
+
+message Void {
+}
+
+// A single performance scenario: input to qps_json_driver
+message Scenario {
+  // Human readable name for this scenario
+  string name = 1;
+  // Client configuration
+  ClientConfig client_config = 2;
+  // Number of clients to start for the test
+  int32 num_clients = 3;
+  // Server configuration
+  ServerConfig server_config = 4;
+  // Number of servers to start for the test
+  int32 num_servers = 5;
+  // Warmup period, in seconds
+  int32 warmup_seconds = 6;
+  // Benchmark time, in seconds
+  int32 benchmark_seconds = 7;
+  // Number of workers to spawn locally (usually zero)
+  int32 spawn_local_worker_count = 8;
+}
+
+// A set of scenarios to be run with qps_json_driver
+message Scenarios {
+  repeated Scenario scenarios = 1;
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.pb.go b/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.pb.go
new file mode 100644
index 00000000000..b3c8cff7542
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.pb.go
@@ -0,0 +1,347 @@
+// Code generated by protoc-gen-go.
+// source: messages.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// The type of payload that should be returned.
+type PayloadType int32
+
+const (
+	// Compressable text format.
+	PayloadType_COMPRESSABLE PayloadType = 0
+	// Uncompressable binary format.
+	PayloadType_UNCOMPRESSABLE PayloadType = 1
+	// Randomly chosen from all other formats defined in this enum.
+	PayloadType_RANDOM PayloadType = 2
+)
+
+var PayloadType_name = map[int32]string{
+	0: "COMPRESSABLE",
+	1: "UNCOMPRESSABLE",
+	2: "RANDOM",
+}
+var PayloadType_value = map[string]int32{
+	"COMPRESSABLE":   0,
+	"UNCOMPRESSABLE": 1,
+	"RANDOM":         2,
+}
+
+func (x PayloadType) String() string {
+	return proto.EnumName(PayloadType_name, int32(x))
+}
+func (PayloadType) EnumDescriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+// Compression algorithms
+type CompressionType int32
+
+const (
+	// No compression
+	CompressionType_NONE    CompressionType = 0
+	CompressionType_GZIP    CompressionType = 1
+	CompressionType_DEFLATE CompressionType = 2
+)
+
+var CompressionType_name = map[int32]string{
+	0: "NONE",
+	1: "GZIP",
+	2: "DEFLATE",
+}
+var CompressionType_value = map[string]int32{
+	"NONE":    0,
+	"GZIP":    1,
+	"DEFLATE": 2,
+}
+
+func (x CompressionType) String() string {
+	return proto.EnumName(CompressionType_name, int32(x))
+}
+func (CompressionType) EnumDescriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+// A block of data, to simply increase gRPC message size.
+type Payload struct {
+	// The type of data in body.
+	Type PayloadType `protobuf:"varint,1,opt,name=type,enum=grpc.testing.PayloadType" json:"type,omitempty"`
+	// Primary contents of payload.
+	Body []byte `protobuf:"bytes,2,opt,name=body,proto3" json:"body,omitempty"`
+}
+
+func (m *Payload) Reset()                    { *m = Payload{} }
+func (m *Payload) String() string            { return proto.CompactTextString(m) }
+func (*Payload) ProtoMessage()               {}
+func (*Payload) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+// A protobuf representation for grpc status. This is used by test
+// clients to specify a status that the server should attempt to return.
+type EchoStatus struct {
+	Code    int32  `protobuf:"varint,1,opt,name=code" json:"code,omitempty"`
+	Message string `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+}
+
+func (m *EchoStatus) Reset()                    { *m = EchoStatus{} }
+func (m *EchoStatus) String() string            { return proto.CompactTextString(m) }
+func (*EchoStatus) ProtoMessage()               {}
+func (*EchoStatus) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+// Unary request.
+type SimpleRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, server randomly chooses one from other formats.
+	ResponseType PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Desired payload size in the response from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	ResponseSize int32 `protobuf:"varint,2,opt,name=response_size,json=responseSize" json:"response_size,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	// Whether SimpleResponse should include username.
+	FillUsername bool `protobuf:"varint,4,opt,name=fill_username,json=fillUsername" json:"fill_username,omitempty"`
+	// Whether SimpleResponse should include OAuth scope.
+	FillOauthScope bool `protobuf:"varint,5,opt,name=fill_oauth_scope,json=fillOauthScope" json:"fill_oauth_scope,omitempty"`
+	// Compression algorithm to be used by the server for the response (stream)
+	ResponseCompression CompressionType `protobuf:"varint,6,opt,name=response_compression,json=responseCompression,enum=grpc.testing.CompressionType" json:"response_compression,omitempty"`
+	// Whether server should return a given status
+	ResponseStatus *EchoStatus `protobuf:"bytes,7,opt,name=response_status,json=responseStatus" json:"response_status,omitempty"`
+}
+
+func (m *SimpleRequest) Reset()                    { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string            { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()               {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{2} }
+
+func (m *SimpleRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *SimpleRequest) GetResponseStatus() *EchoStatus {
+	if m != nil {
+		return m.ResponseStatus
+	}
+	return nil
+}
+
+// Unary response, as configured by the request.
+type SimpleResponse struct {
+	// Payload to increase message size.
+	Payload *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	// The user the request came from, for verifying authentication was
+	// successful when the client expected it.
+	Username string `protobuf:"bytes,2,opt,name=username" json:"username,omitempty"`
+	// OAuth scope.
+	OauthScope string `protobuf:"bytes,3,opt,name=oauth_scope,json=oauthScope" json:"oauth_scope,omitempty"`
+}
+
+func (m *SimpleResponse) Reset()                    { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string            { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()               {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{3} }
+
+func (m *SimpleResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// Client-streaming request.
+type StreamingInputCallRequest struct {
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+}
+
+func (m *StreamingInputCallRequest) Reset()                    { *m = StreamingInputCallRequest{} }
+func (m *StreamingInputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallRequest) ProtoMessage()               {}
+func (*StreamingInputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{4} }
+
+func (m *StreamingInputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// Client-streaming response.
+type StreamingInputCallResponse struct {
+	// Aggregated size of payloads received from the client.
+	AggregatedPayloadSize int32 `protobuf:"varint,1,opt,name=aggregated_payload_size,json=aggregatedPayloadSize" json:"aggregated_payload_size,omitempty"`
+}
+
+func (m *StreamingInputCallResponse) Reset()                    { *m = StreamingInputCallResponse{} }
+func (m *StreamingInputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallResponse) ProtoMessage()               {}
+func (*StreamingInputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{5} }
+
+// Configuration for a particular response.
+type ResponseParameters struct {
+	// Desired payload sizes in responses from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	Size int32 `protobuf:"varint,1,opt,name=size" json:"size,omitempty"`
+	// Desired interval between consecutive responses in the response stream in
+	// microseconds.
+	IntervalUs int32 `protobuf:"varint,2,opt,name=interval_us,json=intervalUs" json:"interval_us,omitempty"`
+}
+
+func (m *ResponseParameters) Reset()                    { *m = ResponseParameters{} }
+func (m *ResponseParameters) String() string            { return proto.CompactTextString(m) }
+func (*ResponseParameters) ProtoMessage()               {}
+func (*ResponseParameters) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{6} }
+
+// Server-streaming request.
+type StreamingOutputCallRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, the payload from each response in the stream
+	// might be of different types. This is to simulate a mixed type of payload
+	// stream.
+	ResponseType PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Configuration for each expected response message.
+	ResponseParameters []*ResponseParameters `protobuf:"bytes,2,rep,name=response_parameters,json=responseParameters" json:"response_parameters,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	// Compression algorithm to be used by the server for the response (stream)
+	ResponseCompression CompressionType `protobuf:"varint,6,opt,name=response_compression,json=responseCompression,enum=grpc.testing.CompressionType" json:"response_compression,omitempty"`
+	// Whether server should return a given status
+	ResponseStatus *EchoStatus `protobuf:"bytes,7,opt,name=response_status,json=responseStatus" json:"response_status,omitempty"`
+}
+
+func (m *StreamingOutputCallRequest) Reset()                    { *m = StreamingOutputCallRequest{} }
+func (m *StreamingOutputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallRequest) ProtoMessage()               {}
+func (*StreamingOutputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{7} }
+
+func (m *StreamingOutputCallRequest) GetResponseParameters() []*ResponseParameters {
+	if m != nil {
+		return m.ResponseParameters
+	}
+	return nil
+}
+
+func (m *StreamingOutputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *StreamingOutputCallRequest) GetResponseStatus() *EchoStatus {
+	if m != nil {
+		return m.ResponseStatus
+	}
+	return nil
+}
+
+// Server-streaming response, as configured by the request and parameters.
+type StreamingOutputCallResponse struct {
+	// Payload to increase response size.
+	Payload *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+}
+
+func (m *StreamingOutputCallResponse) Reset()                    { *m = StreamingOutputCallResponse{} }
+func (m *StreamingOutputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallResponse) ProtoMessage()               {}
+func (*StreamingOutputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{8} }
+
+func (m *StreamingOutputCallResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// For reconnect interop test only.
+// Client tells server what reconnection parameters it used.
+type ReconnectParams struct {
+	MaxReconnectBackoffMs int32 `protobuf:"varint,1,opt,name=max_reconnect_backoff_ms,json=maxReconnectBackoffMs" json:"max_reconnect_backoff_ms,omitempty"`
+}
+
+func (m *ReconnectParams) Reset()                    { *m = ReconnectParams{} }
+func (m *ReconnectParams) String() string            { return proto.CompactTextString(m) }
+func (*ReconnectParams) ProtoMessage()               {}
+func (*ReconnectParams) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{9} }
+
+// For reconnect interop test only.
+// Server tells client whether its reconnects are following the spec and the
+// reconnect backoffs it saw.
+type ReconnectInfo struct {
+	Passed    bool    `protobuf:"varint,1,opt,name=passed" json:"passed,omitempty"`
+	BackoffMs []int32 `protobuf:"varint,2,rep,name=backoff_ms,json=backoffMs" json:"backoff_ms,omitempty"`
+}
+
+func (m *ReconnectInfo) Reset()                    { *m = ReconnectInfo{} }
+func (m *ReconnectInfo) String() string            { return proto.CompactTextString(m) }
+func (*ReconnectInfo) ProtoMessage()               {}
+func (*ReconnectInfo) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{10} }
+
+func init() {
+	proto.RegisterType((*Payload)(nil), "grpc.testing.Payload")
+	proto.RegisterType((*EchoStatus)(nil), "grpc.testing.EchoStatus")
+	proto.RegisterType((*SimpleRequest)(nil), "grpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "grpc.testing.SimpleResponse")
+	proto.RegisterType((*StreamingInputCallRequest)(nil), "grpc.testing.StreamingInputCallRequest")
+	proto.RegisterType((*StreamingInputCallResponse)(nil), "grpc.testing.StreamingInputCallResponse")
+	proto.RegisterType((*ResponseParameters)(nil), "grpc.testing.ResponseParameters")
+	proto.RegisterType((*StreamingOutputCallRequest)(nil), "grpc.testing.StreamingOutputCallRequest")
+	proto.RegisterType((*StreamingOutputCallResponse)(nil), "grpc.testing.StreamingOutputCallResponse")
+	proto.RegisterType((*ReconnectParams)(nil), "grpc.testing.ReconnectParams")
+	proto.RegisterType((*ReconnectInfo)(nil), "grpc.testing.ReconnectInfo")
+	proto.RegisterEnum("grpc.testing.PayloadType", PayloadType_name, PayloadType_value)
+	proto.RegisterEnum("grpc.testing.CompressionType", CompressionType_name, CompressionType_value)
+}
+
+func init() { proto.RegisterFile("messages.proto", fileDescriptor1) }
+
+var fileDescriptor1 = []byte{
+	// 645 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xcc, 0x55, 0x4d, 0x6f, 0xd3, 0x40,
+	0x10, 0x25, 0xdf, 0xe9, 0x24, 0x4d, 0xa3, 0x85, 0x82, 0x5b, 0x54, 0x51, 0x99, 0x4b, 0x55, 0x89,
+	0x20, 0x15, 0x09, 0x24, 0x0e, 0xa0, 0xb4, 0x4d, 0x51, 0x50, 0x9b, 0x84, 0x75, 0x7b, 0xe1, 0x62,
+	0x6d, 0x9c, 0x4d, 0x1a, 0x11, 0x7b, 0x8d, 0x77, 0x8d, 0x28, 0x07, 0xee, 0xfc, 0x60, 0xee, 0xec,
+	0xae, 0xbd, 0x8e, 0xd3, 0xf6, 0xd0, 0xc2, 0x85, 0xdb, 0xce, 0xcc, 0x9b, 0x97, 0x79, 0x33, 0xcf,
+	0x0a, 0xb4, 0x7c, 0xca, 0x39, 0x99, 0x51, 0xde, 0x09, 0x23, 0x26, 0x18, 0x6a, 0xce, 0xa2, 0xd0,
+	0xeb, 0x08, 0xca, 0xc5, 0x3c, 0x98, 0xd9, 0xa7, 0x50, 0x1b, 0x91, 0xab, 0x05, 0x23, 0x13, 0xf4,
+	0x02, 0xca, 0xe2, 0x2a, 0xa4, 0x56, 0x61, 0xb7, 0xb0, 0xd7, 0x3a, 0xd8, 0xea, 0xe4, 0x71, 0x9d,
+	0x14, 0x74, 0x2e, 0x01, 0x58, 0xc3, 0x10, 0x82, 0xf2, 0x98, 0x4d, 0xae, 0xac, 0xa2, 0x84, 0x37,
+	0xb1, 0x7e, 0xdb, 0x6f, 0x01, 0x7a, 0xde, 0x25, 0x73, 0x04, 0x11, 0x31, 0x57, 0x08, 0x8f, 0x4d,
+	0x12, 0xc2, 0x0a, 0xd6, 0x6f, 0x64, 0x41, 0x2d, 0x9d, 0x47, 0x37, 0xae, 0x61, 0x13, 0xda, 0xbf,
+	0x4a, 0xb0, 0xee, 0xcc, 0xfd, 0x70, 0x41, 0x31, 0xfd, 0x1a, 0xcb, 0x9f, 0x45, 0xef, 0x60, 0x3d,
+	0xa2, 0x3c, 0x64, 0x01, 0xa7, 0xee, 0xdd, 0x26, 0x6b, 0x1a, 0xbc, 0x8a, 0xd0, 0xf3, 0x5c, 0x3f,
+	0x9f, 0xff, 0x48, 0x7e, 0xb1, 0xb2, 0x04, 0x39, 0x32, 0x87, 0x5e, 0x42, 0x2d, 0x4c, 0x18, 0xac,
+	0x92, 0x2c, 0x37, 0x0e, 0x36, 0x6f, 0xa5, 0xc7, 0x06, 0xa5, 0x58, 0xa7, 0xf3, 0xc5, 0xc2, 0x8d,
+	0x39, 0x8d, 0x02, 0xe2, 0x53, 0xab, 0x2c, 0xdb, 0xea, 0xb8, 0xa9, 0x92, 0x17, 0x69, 0x0e, 0xed,
+	0x41, 0x5b, 0x83, 0x18, 0x89, 0xc5, 0xa5, 0xcb, 0x3d, 0x26, 0xa7, 0xaf, 0x68, 0x5c, 0x4b, 0xe5,
+	0x87, 0x2a, 0xed, 0xa8, 0x2c, 0x1a, 0xc1, 0xa3, 0x6c, 0x48, 0x8f, 0xf9, 0xa1, 0x0c, 0xf8, 0x9c,
+	0x05, 0x56, 0x55, 0x6b, 0xdd, 0x59, 0x1d, 0xe6, 0x68, 0x09, 0xd0, 0x7a, 0x1f, 0x9a, 0xd6, 0x5c,
+	0x01, 0x75, 0x61, 0x63, 0x29, 0x5b, 0x5f, 0xc2, 0xaa, 0x69, 0x65, 0xd6, 0x2a, 0xd9, 0xf2, 0x52,
+	0xb8, 0x95, 0xad, 0x44, 0xc7, 0xf6, 0x4f, 0x68, 0x99, 0x53, 0x24, 0xf9, 0xfc, 0x9a, 0x0a, 0x77,
+	0x5a, 0xd3, 0x36, 0xd4, 0xb3, 0x0d, 0x25, 0x97, 0xce, 0x62, 0xf4, 0x0c, 0x1a, 0xf9, 0xc5, 0x94,
+	0x74, 0x19, 0x58, 0xb6, 0x14, 0xe9, 0xca, 0x2d, 0x47, 0x44, 0x94, 0xf8, 0x92, 0xba, 0x1f, 0x84,
+	0xb1, 0x38, 0x22, 0x8b, 0x85, 0xb1, 0xc5, 0x7d, 0x47, 0xb1, 0xcf, 0x61, 0xfb, 0x36, 0xb6, 0x54,
+	0xd9, 0x6b, 0x78, 0x42, 0x66, 0xb3, 0x88, 0xce, 0x88, 0xa0, 0x13, 0x37, 0xed, 0x49, 0xfc, 0x92,
+	0x18, 0x77, 0x73, 0x59, 0x4e, 0xa9, 0x95, 0x71, 0xec, 0x3e, 0x20, 0xc3, 0x31, 0x22, 0x91, 0x94,
+	0x25, 0x68, 0xa4, 0x3d, 0x9f, 0x6b, 0xd5, 0x6f, 0x25, 0x77, 0x1e, 0xc8, 0xea, 0x37, 0xa2, 0x5c,
+	0x93, 0xba, 0x10, 0x4c, 0xea, 0x82, 0xdb, 0xbf, 0x8b, 0xb9, 0x09, 0x87, 0xb1, 0xb8, 0x26, 0xf8,
+	0x5f, 0xbf, 0x83, 0x4f, 0x90, 0xf9, 0x44, 0xea, 0x33, 0xa3, 0xca, 0x39, 0x4a, 0x72, 0x79, 0xbb,
+	0xab, 0x2c, 0x37, 0x25, 0x61, 0x14, 0xdd, 0x94, 0x79, 0xef, 0xaf, 0xe6, 0xbf, 0xb4, 0xf9, 0x00,
+	0x9e, 0xde, 0xba, 0xf6, 0xbf, 0xf4, 0xbc, 0xfd, 0x11, 0x36, 0x30, 0xf5, 0x58, 0x10, 0x50, 0x4f,
+	0xe8, 0x65, 0x71, 0xf4, 0x06, 0x2c, 0x9f, 0x7c, 0x77, 0x23, 0x93, 0x76, 0xc7, 0xc4, 0xfb, 0xc2,
+	0xa6, 0x53, 0xd7, 0xe7, 0xc6, 0x5e, 0xb2, 0x9e, 0x75, 0x1d, 0x26, 0xd5, 0x33, 0x6e, 0x9f, 0xc0,
+	0x7a, 0x96, 0xed, 0x07, 0x53, 0x86, 0x1e, 0x43, 0x35, 0x24, 0x9c, 0xd3, 0x64, 0x98, 0x3a, 0x4e,
+	0x23, 0xb4, 0x03, 0x90, 0xe3, 0x54, 0x47, 0xad, 0xe0, 0xb5, 0xb1, 0xe1, 0xd9, 0x7f, 0x0f, 0x8d,
+	0x9c, 0x33, 0x50, 0x1b, 0x9a, 0x47, 0xc3, 0xb3, 0x11, 0xee, 0x39, 0x4e, 0xf7, 0xf0, 0xb4, 0xd7,
+	0x7e, 0x20, 0x1d, 0xdb, 0xba, 0x18, 0xac, 0xe4, 0x0a, 0x08, 0xa0, 0x8a, 0xbb, 0x83, 0xe3, 0xe1,
+	0x59, 0xbb, 0xb8, 0x7f, 0x00, 0x1b, 0xd7, 0xee, 0x81, 0xea, 0x50, 0x1e, 0x0c, 0x07, 0xaa, 0x59,
+	0xbe, 0x3e, 0x7c, 0xee, 0x8f, 0x64, 0x4b, 0x03, 0x6a, 0xc7, 0xbd, 0x93, 0xd3, 0xee, 0x79, 0xaf,
+	0x5d, 0x1c, 0x57, 0xf5, 0x5f, 0xcd, 0xab, 0x3f, 0x01, 0x00, 0x00, 0xff, 0xff, 0xc2, 0x6a, 0xce,
+	0x1e, 0x7c, 0x06, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.proto b/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.proto
new file mode 100644
index 00000000000..b1abc9e8187
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/messages.proto
@@ -0,0 +1,172 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Message definitions to be used by integration test service definitions.
+
+syntax = "proto3";
+
+package grpc.testing;
+
+// The type of payload that should be returned.
+enum PayloadType {
+  // Compressable text format.
+  COMPRESSABLE = 0;
+
+  // Uncompressable binary format.
+  UNCOMPRESSABLE = 1;
+
+  // Randomly chosen from all other formats defined in this enum.
+  RANDOM = 2;
+}
+
+// Compression algorithms
+enum CompressionType {
+  // No compression
+  NONE = 0;
+  GZIP = 1;
+  DEFLATE = 2;
+}
+
+// A block of data, to simply increase gRPC message size.
+message Payload {
+  // The type of data in body.
+  PayloadType type = 1;
+  // Primary contents of payload.
+  bytes body = 2;
+}
+
+// A protobuf representation for grpc status. This is used by test
+// clients to specify a status that the server should attempt to return.
+message EchoStatus {
+  int32 code = 1;
+  string message = 2;
+}
+
+// Unary request.
+message SimpleRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, server randomly chooses one from other formats.
+  PayloadType response_type = 1;
+
+  // Desired payload size in the response from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  int32 response_size = 2;
+
+  // Optional input payload sent along with the request.
+  Payload payload = 3;
+
+  // Whether SimpleResponse should include username.
+  bool fill_username = 4;
+
+  // Whether SimpleResponse should include OAuth scope.
+  bool fill_oauth_scope = 5;
+
+  // Compression algorithm to be used by the server for the response (stream)
+  CompressionType response_compression = 6;
+
+  // Whether server should return a given status
+  EchoStatus response_status = 7;
+}
+
+// Unary response, as configured by the request.
+message SimpleResponse {
+  // Payload to increase message size.
+  Payload payload = 1;
+  // The user the request came from, for verifying authentication was
+  // successful when the client expected it.
+  string username = 2;
+  // OAuth scope.
+  string oauth_scope = 3;
+}
+
+// Client-streaming request.
+message StreamingInputCallRequest {
+  // Optional input payload sent along with the request.
+  Payload payload = 1;
+
+  // Not expecting any payload from the response.
+}
+
+// Client-streaming response.
+message StreamingInputCallResponse {
+  // Aggregated size of payloads received from the client.
+  int32 aggregated_payload_size = 1;
+}
+
+// Configuration for a particular response.
+message ResponseParameters {
+  // Desired payload sizes in responses from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  int32 size = 1;
+
+  // Desired interval between consecutive responses in the response stream in
+  // microseconds.
+  int32 interval_us = 2;
+}
+
+// Server-streaming request.
+message StreamingOutputCallRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, the payload from each response in the stream
+  // might be of different types. This is to simulate a mixed type of payload
+  // stream.
+  PayloadType response_type = 1;
+
+  // Configuration for each expected response message.
+  repeated ResponseParameters response_parameters = 2;
+
+  // Optional input payload sent along with the request.
+  Payload payload = 3;
+
+  // Compression algorithm to be used by the server for the response (stream)
+  CompressionType response_compression = 6;
+
+  // Whether server should return a given status
+  EchoStatus response_status = 7;
+}
+
+// Server-streaming response, as configured by the request and parameters.
+message StreamingOutputCallResponse {
+  // Payload to increase response size.
+  Payload payload = 1;
+}
+
+// For reconnect interop test only.
+// Client tells server what reconnection parameters it used.
+message ReconnectParams {
+  int32 max_reconnect_backoff_ms = 1;
+}
+
+// For reconnect interop test only.
+// Server tells client whether its reconnects are following the spec and the
+// reconnect backoffs it saw.
+message ReconnectInfo {
+  bool passed = 1;
+  repeated int32 backoff_ms = 2;
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.pb.go b/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.pb.go
new file mode 100644
index 00000000000..ffc357d899f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.pb.go
@@ -0,0 +1,223 @@
+// Code generated by protoc-gen-go.
+// source: payloads.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type ByteBufferParams struct {
+	ReqSize  int32 `protobuf:"varint,1,opt,name=req_size,json=reqSize" json:"req_size,omitempty"`
+	RespSize int32 `protobuf:"varint,2,opt,name=resp_size,json=respSize" json:"resp_size,omitempty"`
+}
+
+func (m *ByteBufferParams) Reset()                    { *m = ByteBufferParams{} }
+func (m *ByteBufferParams) String() string            { return proto.CompactTextString(m) }
+func (*ByteBufferParams) ProtoMessage()               {}
+func (*ByteBufferParams) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{0} }
+
+type SimpleProtoParams struct {
+	ReqSize  int32 `protobuf:"varint,1,opt,name=req_size,json=reqSize" json:"req_size,omitempty"`
+	RespSize int32 `protobuf:"varint,2,opt,name=resp_size,json=respSize" json:"resp_size,omitempty"`
+}
+
+func (m *SimpleProtoParams) Reset()                    { *m = SimpleProtoParams{} }
+func (m *SimpleProtoParams) String() string            { return proto.CompactTextString(m) }
+func (*SimpleProtoParams) ProtoMessage()               {}
+func (*SimpleProtoParams) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{1} }
+
+type ComplexProtoParams struct {
+}
+
+func (m *ComplexProtoParams) Reset()                    { *m = ComplexProtoParams{} }
+func (m *ComplexProtoParams) String() string            { return proto.CompactTextString(m) }
+func (*ComplexProtoParams) ProtoMessage()               {}
+func (*ComplexProtoParams) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{2} }
+
+type PayloadConfig struct {
+	// Types that are valid to be assigned to Payload:
+	//	*PayloadConfig_BytebufParams
+	//	*PayloadConfig_SimpleParams
+	//	*PayloadConfig_ComplexParams
+	Payload isPayloadConfig_Payload `protobuf_oneof:"payload"`
+}
+
+func (m *PayloadConfig) Reset()                    { *m = PayloadConfig{} }
+func (m *PayloadConfig) String() string            { return proto.CompactTextString(m) }
+func (*PayloadConfig) ProtoMessage()               {}
+func (*PayloadConfig) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{3} }
+
+type isPayloadConfig_Payload interface {
+	isPayloadConfig_Payload()
+}
+
+type PayloadConfig_BytebufParams struct {
+	BytebufParams *ByteBufferParams `protobuf:"bytes,1,opt,name=bytebuf_params,json=bytebufParams,oneof"`
+}
+type PayloadConfig_SimpleParams struct {
+	SimpleParams *SimpleProtoParams `protobuf:"bytes,2,opt,name=simple_params,json=simpleParams,oneof"`
+}
+type PayloadConfig_ComplexParams struct {
+	ComplexParams *ComplexProtoParams `protobuf:"bytes,3,opt,name=complex_params,json=complexParams,oneof"`
+}
+
+func (*PayloadConfig_BytebufParams) isPayloadConfig_Payload() {}
+func (*PayloadConfig_SimpleParams) isPayloadConfig_Payload()  {}
+func (*PayloadConfig_ComplexParams) isPayloadConfig_Payload() {}
+
+func (m *PayloadConfig) GetPayload() isPayloadConfig_Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *PayloadConfig) GetBytebufParams() *ByteBufferParams {
+	if x, ok := m.GetPayload().(*PayloadConfig_BytebufParams); ok {
+		return x.BytebufParams
+	}
+	return nil
+}
+
+func (m *PayloadConfig) GetSimpleParams() *SimpleProtoParams {
+	if x, ok := m.GetPayload().(*PayloadConfig_SimpleParams); ok {
+		return x.SimpleParams
+	}
+	return nil
+}
+
+func (m *PayloadConfig) GetComplexParams() *ComplexProtoParams {
+	if x, ok := m.GetPayload().(*PayloadConfig_ComplexParams); ok {
+		return x.ComplexParams
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*PayloadConfig) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _PayloadConfig_OneofMarshaler, _PayloadConfig_OneofUnmarshaler, _PayloadConfig_OneofSizer, []interface{}{
+		(*PayloadConfig_BytebufParams)(nil),
+		(*PayloadConfig_SimpleParams)(nil),
+		(*PayloadConfig_ComplexParams)(nil),
+	}
+}
+
+func _PayloadConfig_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*PayloadConfig)
+	// payload
+	switch x := m.Payload.(type) {
+	case *PayloadConfig_BytebufParams:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.BytebufParams); err != nil {
+			return err
+		}
+	case *PayloadConfig_SimpleParams:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.SimpleParams); err != nil {
+			return err
+		}
+	case *PayloadConfig_ComplexParams:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ComplexParams); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("PayloadConfig.Payload has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _PayloadConfig_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*PayloadConfig)
+	switch tag {
+	case 1: // payload.bytebuf_params
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ByteBufferParams)
+		err := b.DecodeMessage(msg)
+		m.Payload = &PayloadConfig_BytebufParams{msg}
+		return true, err
+	case 2: // payload.simple_params
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(SimpleProtoParams)
+		err := b.DecodeMessage(msg)
+		m.Payload = &PayloadConfig_SimpleParams{msg}
+		return true, err
+	case 3: // payload.complex_params
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ComplexProtoParams)
+		err := b.DecodeMessage(msg)
+		m.Payload = &PayloadConfig_ComplexParams{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _PayloadConfig_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*PayloadConfig)
+	// payload
+	switch x := m.Payload.(type) {
+	case *PayloadConfig_BytebufParams:
+		s := proto.Size(x.BytebufParams)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *PayloadConfig_SimpleParams:
+		s := proto.Size(x.SimpleParams)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *PayloadConfig_ComplexParams:
+		s := proto.Size(x.ComplexParams)
+		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+func init() {
+	proto.RegisterType((*ByteBufferParams)(nil), "grpc.testing.ByteBufferParams")
+	proto.RegisterType((*SimpleProtoParams)(nil), "grpc.testing.SimpleProtoParams")
+	proto.RegisterType((*ComplexProtoParams)(nil), "grpc.testing.ComplexProtoParams")
+	proto.RegisterType((*PayloadConfig)(nil), "grpc.testing.PayloadConfig")
+}
+
+func init() { proto.RegisterFile("payloads.proto", fileDescriptor2) }
+
+var fileDescriptor2 = []byte{
+	// 250 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0x2b, 0x48, 0xac, 0xcc,
+	0xc9, 0x4f, 0x4c, 0x29, 0xd6, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x49, 0x2f, 0x2a, 0x48,
+	0xd6, 0x2b, 0x49, 0x2d, 0x2e, 0xc9, 0xcc, 0x4b, 0x57, 0xf2, 0xe2, 0x12, 0x70, 0xaa, 0x2c, 0x49,
+	0x75, 0x2a, 0x4d, 0x4b, 0x4b, 0x2d, 0x0a, 0x48, 0x2c, 0x4a, 0xcc, 0x2d, 0x16, 0x92, 0xe4, 0xe2,
+	0x28, 0x4a, 0x2d, 0x8c, 0x2f, 0xce, 0xac, 0x4a, 0x95, 0x60, 0x54, 0x60, 0xd4, 0x60, 0x0d, 0x62,
+	0x07, 0xf2, 0x83, 0x81, 0x5c, 0x21, 0x69, 0x2e, 0xce, 0xa2, 0xd4, 0xe2, 0x02, 0x88, 0x1c, 0x13,
+	0x58, 0x8e, 0x03, 0x24, 0x00, 0x92, 0x54, 0xf2, 0xe6, 0x12, 0x0c, 0xce, 0xcc, 0x2d, 0xc8, 0x49,
+	0x0d, 0x00, 0x59, 0x44, 0xa1, 0x61, 0x22, 0x5c, 0x42, 0xce, 0xf9, 0x20, 0xc3, 0x2a, 0x90, 0x4c,
+	0x53, 0xfa, 0xc6, 0xc8, 0xc5, 0x1b, 0x00, 0xf1, 0x8f, 0x73, 0x7e, 0x5e, 0x5a, 0x66, 0xba, 0x90,
+	0x3b, 0x17, 0x5f, 0x12, 0xd0, 0x03, 0x49, 0xa5, 0x69, 0xf1, 0x05, 0x60, 0x35, 0x60, 0x5b, 0xb8,
+	0x8d, 0xe4, 0xf4, 0x90, 0xfd, 0xa9, 0x87, 0xee, 0x49, 0x0f, 0x86, 0x20, 0x5e, 0xa8, 0x3e, 0xa8,
+	0x43, 0xdd, 0xb8, 0x78, 0x8b, 0xc1, 0xae, 0x87, 0x99, 0xc3, 0x04, 0x36, 0x47, 0x1e, 0xd5, 0x1c,
+	0x0c, 0x0f, 0x02, 0x0d, 0xe2, 0x81, 0xe8, 0x83, 0x9a, 0xe3, 0xc9, 0xc5, 0x97, 0x0c, 0x71, 0x38,
+	0xcc, 0x20, 0x66, 0xb0, 0x41, 0x0a, 0xa8, 0x06, 0x61, 0x7a, 0x0e, 0xe4, 0x24, 0xa8, 0x4e, 0x88,
+	0x80, 0x13, 0x27, 0x17, 0x3b, 0x34, 0xf2, 0x92, 0xd8, 0xc0, 0x91, 0x67, 0x0c, 0x08, 0x00, 0x00,
+	0xff, 0xff, 0xb0, 0x8c, 0x18, 0x4e, 0xce, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.proto b/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.proto
new file mode 100644
index 00000000000..056fe0c72ed
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/payloads.proto
@@ -0,0 +1,55 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package grpc.testing;
+
+message ByteBufferParams {
+  int32 req_size = 1;
+  int32 resp_size = 2;
+}
+
+message SimpleProtoParams {
+  int32 req_size = 1;
+  int32 resp_size = 2;
+}
+
+message ComplexProtoParams {
+  // TODO (vpai): Fill this in once the details of complex, representative
+  //              protos are decided
+}
+
+message PayloadConfig {
+  oneof payload {
+    ByteBufferParams bytebuf_params = 1;
+    SimpleProtoParams simple_params = 2;
+    ComplexProtoParams complex_params = 3;
+  }
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.pb.go b/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.pb.go
new file mode 100644
index 00000000000..2aae3179bc4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.pb.go
@@ -0,0 +1,443 @@
+// Code generated by protoc-gen-go.
+// source: services.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for BenchmarkService service
+
+type BenchmarkServiceClient interface {
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	StreamingCall(ctx context.Context, opts ...grpc.CallOption) (BenchmarkService_StreamingCallClient, error)
+}
+
+type benchmarkServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewBenchmarkServiceClient(cc *grpc.ClientConn) BenchmarkServiceClient {
+	return &benchmarkServiceClient{cc}
+}
+
+func (c *benchmarkServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.BenchmarkService/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *benchmarkServiceClient) StreamingCall(ctx context.Context, opts ...grpc.CallOption) (BenchmarkService_StreamingCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_BenchmarkService_serviceDesc.Streams[0], c.cc, "/grpc.testing.BenchmarkService/StreamingCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &benchmarkServiceStreamingCallClient{stream}
+	return x, nil
+}
+
+type BenchmarkService_StreamingCallClient interface {
+	Send(*SimpleRequest) error
+	Recv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type benchmarkServiceStreamingCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *benchmarkServiceStreamingCallClient) Send(m *SimpleRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *benchmarkServiceStreamingCallClient) Recv() (*SimpleResponse, error) {
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for BenchmarkService service
+
+type BenchmarkServiceServer interface {
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	StreamingCall(BenchmarkService_StreamingCallServer) error
+}
+
+func RegisterBenchmarkServiceServer(s *grpc.Server, srv BenchmarkServiceServer) {
+	s.RegisterService(&_BenchmarkService_serviceDesc, srv)
+}
+
+func _BenchmarkService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BenchmarkServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.BenchmarkService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BenchmarkServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _BenchmarkService_StreamingCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(BenchmarkServiceServer).StreamingCall(&benchmarkServiceStreamingCallServer{stream})
+}
+
+type BenchmarkService_StreamingCallServer interface {
+	Send(*SimpleResponse) error
+	Recv() (*SimpleRequest, error)
+	grpc.ServerStream
+}
+
+type benchmarkServiceStreamingCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *benchmarkServiceStreamingCallServer) Send(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *benchmarkServiceStreamingCallServer) Recv() (*SimpleRequest, error) {
+	m := new(SimpleRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _BenchmarkService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.BenchmarkService",
+	HandlerType: (*BenchmarkServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnaryCall",
+			Handler:    _BenchmarkService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingCall",
+			Handler:       _BenchmarkService_StreamingCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "services.proto",
+}
+
+// Client API for WorkerService service
+
+type WorkerServiceClient interface {
+	// Start server with specified workload.
+	// First request sent specifies the ServerConfig followed by ServerStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test server
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunServer(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunServerClient, error)
+	// Start client with specified workload.
+	// First request sent specifies the ClientConfig followed by ClientStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test client
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunClient(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunClientClient, error)
+	// Just return the core count - unary call
+	CoreCount(ctx context.Context, in *CoreRequest, opts ...grpc.CallOption) (*CoreResponse, error)
+	// Quit this worker
+	QuitWorker(ctx context.Context, in *Void, opts ...grpc.CallOption) (*Void, error)
+}
+
+type workerServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewWorkerServiceClient(cc *grpc.ClientConn) WorkerServiceClient {
+	return &workerServiceClient{cc}
+}
+
+func (c *workerServiceClient) RunServer(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunServerClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_WorkerService_serviceDesc.Streams[0], c.cc, "/grpc.testing.WorkerService/RunServer", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &workerServiceRunServerClient{stream}
+	return x, nil
+}
+
+type WorkerService_RunServerClient interface {
+	Send(*ServerArgs) error
+	Recv() (*ServerStatus, error)
+	grpc.ClientStream
+}
+
+type workerServiceRunServerClient struct {
+	grpc.ClientStream
+}
+
+func (x *workerServiceRunServerClient) Send(m *ServerArgs) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *workerServiceRunServerClient) Recv() (*ServerStatus, error) {
+	m := new(ServerStatus)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *workerServiceClient) RunClient(ctx context.Context, opts ...grpc.CallOption) (WorkerService_RunClientClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_WorkerService_serviceDesc.Streams[1], c.cc, "/grpc.testing.WorkerService/RunClient", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &workerServiceRunClientClient{stream}
+	return x, nil
+}
+
+type WorkerService_RunClientClient interface {
+	Send(*ClientArgs) error
+	Recv() (*ClientStatus, error)
+	grpc.ClientStream
+}
+
+type workerServiceRunClientClient struct {
+	grpc.ClientStream
+}
+
+func (x *workerServiceRunClientClient) Send(m *ClientArgs) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *workerServiceRunClientClient) Recv() (*ClientStatus, error) {
+	m := new(ClientStatus)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *workerServiceClient) CoreCount(ctx context.Context, in *CoreRequest, opts ...grpc.CallOption) (*CoreResponse, error) {
+	out := new(CoreResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.WorkerService/CoreCount", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *workerServiceClient) QuitWorker(ctx context.Context, in *Void, opts ...grpc.CallOption) (*Void, error) {
+	out := new(Void)
+	err := grpc.Invoke(ctx, "/grpc.testing.WorkerService/QuitWorker", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for WorkerService service
+
+type WorkerServiceServer interface {
+	// Start server with specified workload.
+	// First request sent specifies the ServerConfig followed by ServerStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test server
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunServer(WorkerService_RunServerServer) error
+	// Start client with specified workload.
+	// First request sent specifies the ClientConfig followed by ClientStatus
+	// response. After that, a "Mark" can be sent anytime to request the latest
+	// stats. Closing the stream will initiate shutdown of the test client
+	// and once the shutdown has finished, the OK status is sent to terminate
+	// this RPC.
+	RunClient(WorkerService_RunClientServer) error
+	// Just return the core count - unary call
+	CoreCount(context.Context, *CoreRequest) (*CoreResponse, error)
+	// Quit this worker
+	QuitWorker(context.Context, *Void) (*Void, error)
+}
+
+func RegisterWorkerServiceServer(s *grpc.Server, srv WorkerServiceServer) {
+	s.RegisterService(&_WorkerService_serviceDesc, srv)
+}
+
+func _WorkerService_RunServer_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(WorkerServiceServer).RunServer(&workerServiceRunServerServer{stream})
+}
+
+type WorkerService_RunServerServer interface {
+	Send(*ServerStatus) error
+	Recv() (*ServerArgs, error)
+	grpc.ServerStream
+}
+
+type workerServiceRunServerServer struct {
+	grpc.ServerStream
+}
+
+func (x *workerServiceRunServerServer) Send(m *ServerStatus) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *workerServiceRunServerServer) Recv() (*ServerArgs, error) {
+	m := new(ServerArgs)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _WorkerService_RunClient_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(WorkerServiceServer).RunClient(&workerServiceRunClientServer{stream})
+}
+
+type WorkerService_RunClientServer interface {
+	Send(*ClientStatus) error
+	Recv() (*ClientArgs, error)
+	grpc.ServerStream
+}
+
+type workerServiceRunClientServer struct {
+	grpc.ServerStream
+}
+
+func (x *workerServiceRunClientServer) Send(m *ClientStatus) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *workerServiceRunClientServer) Recv() (*ClientArgs, error) {
+	m := new(ClientArgs)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _WorkerService_CoreCount_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CoreRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WorkerServiceServer).CoreCount(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.WorkerService/CoreCount",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WorkerServiceServer).CoreCount(ctx, req.(*CoreRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _WorkerService_QuitWorker_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Void)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(WorkerServiceServer).QuitWorker(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.WorkerService/QuitWorker",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(WorkerServiceServer).QuitWorker(ctx, req.(*Void))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _WorkerService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.WorkerService",
+	HandlerType: (*WorkerServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CoreCount",
+			Handler:    _WorkerService_CoreCount_Handler,
+		},
+		{
+			MethodName: "QuitWorker",
+			Handler:    _WorkerService_QuitWorker_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "RunServer",
+			Handler:       _WorkerService_RunServer_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "RunClient",
+			Handler:       _WorkerService_RunClient_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "services.proto",
+}
+
+func init() { proto.RegisterFile("services.proto", fileDescriptor3) }
+
+var fileDescriptor3 = []byte{
+	// 254 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xa4, 0x91, 0xc1, 0x4a, 0xc4, 0x30,
+	0x10, 0x86, 0xa9, 0x07, 0xa1, 0xc1, 0x2e, 0x92, 0x93, 0x46, 0x1f, 0xc0, 0x53, 0x91, 0xd5, 0x17,
+	0x70, 0x8b, 0x1e, 0x05, 0xb7, 0xa8, 0xe7, 0x58, 0x87, 0x1a, 0x36, 0x4d, 0xea, 0xcc, 0x44, 0xf0,
+	0x49, 0x7c, 0x07, 0x9f, 0xd2, 0xee, 0x66, 0x0b, 0xb5, 0xe4, 0xb6, 0xc7, 0xf9, 0xbf, 0xe1, 0x23,
+	0x7f, 0x46, 0x2c, 0x08, 0xf0, 0xcb, 0x34, 0x40, 0x65, 0x8f, 0x9e, 0xbd, 0x3c, 0x69, 0xb1, 0x6f,
+	0x4a, 0x06, 0x62, 0xe3, 0x5a, 0xb5, 0xe8, 0x80, 0x48, 0xb7, 0x23, 0x55, 0x45, 0xe3, 0x1d, 0xa3,
+	0xb7, 0x71, 0x5c, 0xfe, 0x66, 0xe2, 0x74, 0x05, 0xae, 0xf9, 0xe8, 0x34, 0x6e, 0xea, 0x28, 0x92,
+	0x0f, 0x22, 0x7f, 0x76, 0x1a, 0xbf, 0x2b, 0x6d, 0xad, 0xbc, 0x28, 0xa7, 0xbe, 0xb2, 0x36, 0x5d,
+	0x6f, 0x61, 0x0d, 0x9f, 0x61, 0x08, 0xd4, 0x65, 0x1a, 0x52, 0xef, 0x1d, 0x81, 0x7c, 0x14, 0x45,
+	0xcd, 0x08, 0xba, 0x1b, 0xd8, 0x81, 0xae, 0xab, 0xec, 0x3a, 0x5b, 0xfe, 0x1c, 0x89, 0xe2, 0xd5,
+	0xe3, 0x06, 0x70, 0x7c, 0xe9, 0xbd, 0xc8, 0xd7, 0xc1, 0x6d, 0x27, 0x40, 0x79, 0x36, 0x13, 0xec,
+	0xd2, 0x3b, 0x6c, 0x49, 0xa9, 0x14, 0xa9, 0x59, 0x73, 0xa0, 0xad, 0x78, 0xaf, 0xa9, 0xac, 0x01,
+	0xc7, 0x73, 0x4d, 0x4c, 0x53, 0x9a, 0x48, 0x26, 0x9a, 0x95, 0xc8, 0x2b, 0x8f, 0x50, 0xf9, 0x30,
+	0x68, 0xce, 0x67, 0xcb, 0x03, 0x18, 0x9b, 0xaa, 0x14, 0xda, 0xff, 0xd9, 0xad, 0x10, 0x4f, 0xc1,
+	0x70, 0xac, 0x29, 0xe5, 0xff, 0xcd, 0x17, 0x6f, 0xde, 0x55, 0x22, 0x7b, 0x3b, 0xde, 0x5d, 0xf3,
+	0xe6, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x3b, 0x84, 0x02, 0xe3, 0x0c, 0x02, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.proto b/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.proto
new file mode 100644
index 00000000000..c2acca7f1a3
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/services.proto
@@ -0,0 +1,71 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// An integration test service that covers all the method signature permutations
+// of unary/streaming requests/responses.
+syntax = "proto3";
+
+import "messages.proto";
+import "control.proto";
+
+package grpc.testing;
+
+service BenchmarkService {
+  // One request followed by one response.
+  // The server returns the client payload as-is.
+  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
+
+  // One request followed by one response.
+  // The server returns the client payload as-is.
+  rpc StreamingCall(stream SimpleRequest) returns (stream SimpleResponse);
+}
+
+service WorkerService {
+  // Start server with specified workload.
+  // First request sent specifies the ServerConfig followed by ServerStatus
+  // response. After that, a "Mark" can be sent anytime to request the latest
+  // stats. Closing the stream will initiate shutdown of the test server
+  // and once the shutdown has finished, the OK status is sent to terminate
+  // this RPC.
+  rpc RunServer(stream ServerArgs) returns (stream ServerStatus);
+
+  // Start client with specified workload.
+  // First request sent specifies the ClientConfig followed by ClientStatus
+  // response. After that, a "Mark" can be sent anytime to request the latest
+  // stats. Closing the stream will initiate shutdown of the test client
+  // and once the shutdown has finished, the OK status is sent to terminate
+  // this RPC.
+  rpc RunClient(stream ClientArgs) returns (stream ClientStatus);
+
+  // Just return the core count - unary call
+  rpc CoreCount(CoreRequest) returns (CoreResponse);
+
+  // Quit this worker
+  rpc QuitWorker(Void) returns (Void);
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.pb.go b/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.pb.go
new file mode 100644
index 00000000000..45b9b4af690
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.pb.go
@@ -0,0 +1,111 @@
+// Code generated by protoc-gen-go.
+// source: stats.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type ServerStats struct {
+	// wall clock time change in seconds since last reset
+	TimeElapsed float64 `protobuf:"fixed64,1,opt,name=time_elapsed,json=timeElapsed" json:"time_elapsed,omitempty"`
+	// change in user time (in seconds) used by the server since last reset
+	TimeUser float64 `protobuf:"fixed64,2,opt,name=time_user,json=timeUser" json:"time_user,omitempty"`
+	// change in server time (in seconds) used by the server process and all
+	// threads since last reset
+	TimeSystem float64 `protobuf:"fixed64,3,opt,name=time_system,json=timeSystem" json:"time_system,omitempty"`
+}
+
+func (m *ServerStats) Reset()                    { *m = ServerStats{} }
+func (m *ServerStats) String() string            { return proto.CompactTextString(m) }
+func (*ServerStats) ProtoMessage()               {}
+func (*ServerStats) Descriptor() ([]byte, []int) { return fileDescriptor4, []int{0} }
+
+// Histogram params based on grpc/support/histogram.c
+type HistogramParams struct {
+	Resolution  float64 `protobuf:"fixed64,1,opt,name=resolution" json:"resolution,omitempty"`
+	MaxPossible float64 `protobuf:"fixed64,2,opt,name=max_possible,json=maxPossible" json:"max_possible,omitempty"`
+}
+
+func (m *HistogramParams) Reset()                    { *m = HistogramParams{} }
+func (m *HistogramParams) String() string            { return proto.CompactTextString(m) }
+func (*HistogramParams) ProtoMessage()               {}
+func (*HistogramParams) Descriptor() ([]byte, []int) { return fileDescriptor4, []int{1} }
+
+// Histogram data based on grpc/support/histogram.c
+type HistogramData struct {
+	Bucket       []uint32 `protobuf:"varint,1,rep,name=bucket" json:"bucket,omitempty"`
+	MinSeen      float64  `protobuf:"fixed64,2,opt,name=min_seen,json=minSeen" json:"min_seen,omitempty"`
+	MaxSeen      float64  `protobuf:"fixed64,3,opt,name=max_seen,json=maxSeen" json:"max_seen,omitempty"`
+	Sum          float64  `protobuf:"fixed64,4,opt,name=sum" json:"sum,omitempty"`
+	SumOfSquares float64  `protobuf:"fixed64,5,opt,name=sum_of_squares,json=sumOfSquares" json:"sum_of_squares,omitempty"`
+	Count        float64  `protobuf:"fixed64,6,opt,name=count" json:"count,omitempty"`
+}
+
+func (m *HistogramData) Reset()                    { *m = HistogramData{} }
+func (m *HistogramData) String() string            { return proto.CompactTextString(m) }
+func (*HistogramData) ProtoMessage()               {}
+func (*HistogramData) Descriptor() ([]byte, []int) { return fileDescriptor4, []int{2} }
+
+type ClientStats struct {
+	// Latency histogram. Data points are in nanoseconds.
+	Latencies *HistogramData `protobuf:"bytes,1,opt,name=latencies" json:"latencies,omitempty"`
+	// See ServerStats for details.
+	TimeElapsed float64 `protobuf:"fixed64,2,opt,name=time_elapsed,json=timeElapsed" json:"time_elapsed,omitempty"`
+	TimeUser    float64 `protobuf:"fixed64,3,opt,name=time_user,json=timeUser" json:"time_user,omitempty"`
+	TimeSystem  float64 `protobuf:"fixed64,4,opt,name=time_system,json=timeSystem" json:"time_system,omitempty"`
+}
+
+func (m *ClientStats) Reset()                    { *m = ClientStats{} }
+func (m *ClientStats) String() string            { return proto.CompactTextString(m) }
+func (*ClientStats) ProtoMessage()               {}
+func (*ClientStats) Descriptor() ([]byte, []int) { return fileDescriptor4, []int{3} }
+
+func (m *ClientStats) GetLatencies() *HistogramData {
+	if m != nil {
+		return m.Latencies
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*ServerStats)(nil), "grpc.testing.ServerStats")
+	proto.RegisterType((*HistogramParams)(nil), "grpc.testing.HistogramParams")
+	proto.RegisterType((*HistogramData)(nil), "grpc.testing.HistogramData")
+	proto.RegisterType((*ClientStats)(nil), "grpc.testing.ClientStats")
+}
+
+func init() { proto.RegisterFile("stats.proto", fileDescriptor4) }
+
+var fileDescriptor4 = []byte{
+	// 342 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x84, 0x92, 0x4f, 0x4f, 0xe3, 0x30,
+	0x10, 0xc5, 0x95, 0xa6, 0xed, 0xb6, 0x93, 0x76, 0x77, 0x65, 0xad, 0x56, 0x41, 0x95, 0xf8, 0x13,
+	0x71, 0xe8, 0x29, 0x07, 0x38, 0x71, 0x06, 0x24, 0x6e, 0x54, 0x0d, 0x9c, 0x23, 0x37, 0x4c, 0x2b,
+	0x8b, 0xc4, 0x0e, 0x99, 0x09, 0x2a, 0x1f, 0x09, 0xf1, 0x25, 0x71, 0x9c, 0x08, 0x0a, 0x48, 0x70,
+	0x49, 0xf2, 0x7e, 0x6f, 0x34, 0xe3, 0xc9, 0x33, 0x04, 0xc4, 0x92, 0x29, 0x2e, 0x2b, 0xc3, 0x46,
+	0x4c, 0x36, 0x55, 0x99, 0xc5, 0x8c, 0xc4, 0x4a, 0x6f, 0x22, 0x0d, 0x41, 0x82, 0xd5, 0x23, 0x56,
+	0x49, 0x53, 0x22, 0x8e, 0x60, 0xc2, 0xaa, 0xc0, 0x14, 0x73, 0x59, 0x12, 0xde, 0x85, 0xde, 0xa1,
+	0x37, 0xf7, 0x96, 0x41, 0xc3, 0x2e, 0x5b, 0x24, 0x66, 0x30, 0x76, 0x25, 0x35, 0x61, 0x15, 0xf6,
+	0x9c, 0x3f, 0x6a, 0xc0, 0xad, 0xd5, 0xe2, 0x00, 0x5c, 0x6d, 0x4a, 0x4f, 0xc4, 0x58, 0x84, 0xbe,
+	0xb3, 0xa1, 0x41, 0x89, 0x23, 0xd1, 0x0d, 0xfc, 0xb9, 0x52, 0xc4, 0x66, 0x53, 0xc9, 0x62, 0x21,
+	0xed, 0x83, 0xc4, 0x3e, 0x40, 0x85, 0x64, 0xf2, 0x9a, 0x95, 0xd1, 0xdd, 0xc4, 0x1d, 0xd2, 0x9c,
+	0xa9, 0x90, 0xdb, 0xb4, 0x34, 0x44, 0x6a, 0x95, 0x63, 0x37, 0x33, 0xb0, 0x6c, 0xd1, 0xa1, 0xe8,
+	0xc5, 0x83, 0xe9, 0x5b, 0xdb, 0x0b, 0xc9, 0x52, 0xfc, 0x87, 0xe1, 0xaa, 0xce, 0xee, 0x91, 0x6d,
+	0x43, 0x7f, 0x3e, 0x5d, 0x76, 0x4a, 0xec, 0xc1, 0xa8, 0x50, 0x3a, 0x25, 0x44, 0xdd, 0x35, 0xfa,
+	0x65, 0x75, 0x62, 0xa5, 0xb3, 0xec, 0x1c, 0x67, 0xf9, 0x9d, 0x25, 0xb7, 0xce, 0xfa, 0x0b, 0x3e,
+	0xd5, 0x45, 0xd8, 0x77, 0xb4, 0xf9, 0x14, 0xc7, 0xf0, 0xdb, 0xbe, 0x52, 0xb3, 0x4e, 0xe9, 0xa1,
+	0x96, 0xf6, 0xb4, 0xe1, 0xc0, 0x99, 0x13, 0x4b, 0xaf, 0xd7, 0x49, 0xcb, 0xc4, 0x3f, 0x18, 0x64,
+	0xa6, 0xd6, 0x1c, 0x0e, 0x9d, 0xd9, 0x8a, 0xe8, 0xd9, 0x83, 0xe0, 0x3c, 0x57, 0xa8, 0xb9, 0xfd,
+	0xe9, 0x67, 0x30, 0xce, 0x25, 0xa3, 0xce, 0x94, 0x6d, 0xd3, 0xec, 0x1f, 0x9c, 0xcc, 0xe2, 0xdd,
+	0x94, 0xe2, 0x0f, 0xbb, 0x2d, 0xdf, 0xab, 0xbf, 0xe4, 0xd5, 0xfb, 0x21, 0x2f, 0xff, 0xfb, 0xbc,
+	0xfa, 0x9f, 0xf3, 0x5a, 0x0d, 0xdd, 0xa5, 0x39, 0x7d, 0x0d, 0x00, 0x00, 0xff, 0xff, 0xea, 0x75,
+	0x34, 0x90, 0x43, 0x02, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.proto b/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.proto
new file mode 100644
index 00000000000..9bc3cb216ba
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/grpc_testing/stats.proto
@@ -0,0 +1,70 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+package grpc.testing;
+
+message ServerStats {
+  // wall clock time change in seconds since last reset
+  double time_elapsed = 1;
+
+  // change in user time (in seconds) used by the server since last reset
+  double time_user = 2;
+
+  // change in server time (in seconds) used by the server process and all
+  // threads since last reset
+  double time_system = 3;
+}
+
+// Histogram params based on grpc/support/histogram.c
+message HistogramParams {
+  double resolution = 1;    // first bucket is [0, 1 + resolution)
+  double max_possible = 2;  // use enough buckets to allow this value
+}
+
+// Histogram data based on grpc/support/histogram.c
+message HistogramData {
+  repeated uint32 bucket = 1;
+  double min_seen = 2;
+  double max_seen = 3;
+  double sum = 4;
+  double sum_of_squares = 5;
+  double count = 6;
+}
+
+message ClientStats {
+  // Latency histogram. Data points are in nanoseconds.
+  HistogramData latencies = 1;
+
+  // See ServerStats for details.
+  double time_elapsed = 2;
+  double time_user = 3;
+  double time_system = 4;
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/server/main.go b/vendor/google.golang.org/grpc/benchmark/server/main.go
new file mode 100644
index 00000000000..d43aad0bac0
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/server/main.go
@@ -0,0 +1,35 @@
+package main
+
+import (
+	"flag"
+	"math"
+	"net"
+	"net/http"
+	_ "net/http/pprof"
+	"time"
+
+	"google.golang.org/grpc/benchmark"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	duration = flag.Int("duration", math.MaxInt32, "The duration in seconds to run the benchmark server")
+)
+
+func main() {
+	flag.Parse()
+	go func() {
+		lis, err := net.Listen("tcp", ":0")
+		if err != nil {
+			grpclog.Fatalf("Failed to listen: %v", err)
+		}
+		grpclog.Println("Server profiling address: ", lis.Addr().String())
+		if err := http.Serve(lis, nil); err != nil {
+			grpclog.Fatalf("Failed to serve: %v", err)
+		}
+	}()
+	addr, stopper := benchmark.StartServer(benchmark.ServerInfo{Addr: ":0", Type: "protobuf"}) // listen on all interfaces
+	grpclog.Println("Server Address: ", addr)
+	<-time.After(time.Duration(*duration) * time.Second)
+	stopper()
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/server/testdata/ca.pem b/vendor/google.golang.org/grpc/benchmark/server/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/server/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.key b/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----
+MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAOHDFScoLCVJpYDD
+M4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1BgzkWF+slf
+3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd9N8YwbBY
+AckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAECgYAn7qGnM2vbjJNBm0VZCkOkTIWm
+V10okw7EPJrdL2mkre9NasghNXbE1y5zDshx5Nt3KsazKOxTT8d0Jwh/3KbaN+YY
+tTCbKGW0pXDRBhwUHRcuRzScjli8Rih5UOCiZkhefUTcRb6xIhZJuQy71tjaSy0p
+dHZRmYyBYO2YEQ8xoQJBAPrJPhMBkzmEYFtyIEqAxQ/o/A6E+E4w8i+KM7nQCK7q
+K4JXzyXVAjLfyBZWHGM2uro/fjqPggGD6QH1qXCkI4MCQQDmdKeb2TrKRh5BY1LR
+81aJGKcJ2XbcDu6wMZK4oqWbTX2KiYn9GB0woM6nSr/Y6iy1u145YzYxEV/iMwff
+DJULAkB8B2MnyzOg0pNFJqBJuH29bKCcHa8gHJzqXhNO5lAlEbMK95p/P2Wi+4Hd
+aiEIAF1BF326QJcvYKmwSmrORp85AkAlSNxRJ50OWrfMZnBgzVjDx3xG6KsFQVk2
+ol6VhqL6dFgKUORFUWBvnKSyhjJxurlPEahV6oo6+A+mPhFY8eUvAkAZQyTdupP3
+XEFQKctGz+9+gKkemDp7LBBMEMBXrGTLPhpEfcjv/7KPdnFHYmhYeBTBnuVmTVWe
+F98XJ7tIFfJq
+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.pem b/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/server/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/benchmark/stats/histogram.go b/vendor/google.golang.org/grpc/benchmark/stats/histogram.go
new file mode 100644
index 00000000000..918beadc503
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/stats/histogram.go
@@ -0,0 +1,198 @@
+package stats
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"math"
+	"strconv"
+	"strings"
+)
+
+// Histogram accumulates values in the form of a histogram with
+// exponentially increased bucket sizes.
+type Histogram struct {
+	// Count is the total number of values added to the histogram.
+	Count int64
+	// Sum is the sum of all the values added to the histogram.
+	Sum int64
+	// SumOfSquares is the sum of squares of all values.
+	SumOfSquares int64
+	// Min is the minimum of all the values added to the histogram.
+	Min int64
+	// Max is the maximum of all the values added to the histogram.
+	Max int64
+	// Buckets contains all the buckets of the histogram.
+	Buckets []HistogramBucket
+
+	opts                          HistogramOptions
+	logBaseBucketSize             float64
+	oneOverLogOnePlusGrowthFactor float64
+}
+
+// HistogramOptions contains the parameters that define the histogram's buckets.
+// The first bucket of the created histogram (with index 0) contains [min, min+n)
+// where n = BaseBucketSize, min = MinValue.
+// Bucket i (i>=1) contains [min + n * m^(i-1), min + n * m^i), where m = 1+GrowthFactor.
+// The type of the values is int64.
+type HistogramOptions struct {
+	// NumBuckets is the number of buckets.
+	NumBuckets int
+	// GrowthFactor is the growth factor of the buckets. A value of 0.1
+	// indicates that bucket N+1 will be 10% larger than bucket N.
+	GrowthFactor float64
+	// BaseBucketSize is the size of the first bucket.
+	BaseBucketSize float64
+	// MinValue is the lower bound of the first bucket.
+	MinValue int64
+}
+
+// HistogramBucket represents one histogram bucket.
+type HistogramBucket struct {
+	// LowBound is the lower bound of the bucket.
+	LowBound float64
+	// Count is the number of values in the bucket.
+	Count int64
+}
+
+// NewHistogram returns a pointer to a new Histogram object that was created
+// with the provided options.
+func NewHistogram(opts HistogramOptions) *Histogram {
+	if opts.NumBuckets == 0 {
+		opts.NumBuckets = 32
+	}
+	if opts.BaseBucketSize == 0.0 {
+		opts.BaseBucketSize = 1.0
+	}
+	h := Histogram{
+		Buckets: make([]HistogramBucket, opts.NumBuckets),
+		Min:     math.MaxInt64,
+		Max:     math.MinInt64,
+
+		opts:                          opts,
+		logBaseBucketSize:             math.Log(opts.BaseBucketSize),
+		oneOverLogOnePlusGrowthFactor: 1 / math.Log(1+opts.GrowthFactor),
+	}
+	m := 1.0 + opts.GrowthFactor
+	delta := opts.BaseBucketSize
+	h.Buckets[0].LowBound = float64(opts.MinValue)
+	for i := 1; i < opts.NumBuckets; i++ {
+		h.Buckets[i].LowBound = float64(opts.MinValue) + delta
+		delta = delta * m
+	}
+	return &h
+}
+
+// Print writes textual output of the histogram values.
+func (h *Histogram) Print(w io.Writer) {
+	avg := float64(h.Sum) / float64(h.Count)
+	fmt.Fprintf(w, "Count: %d  Min: %d  Max: %d  Avg: %.2f\n", h.Count, h.Min, h.Max, avg)
+	fmt.Fprintf(w, "%s\n", strings.Repeat("-", 60))
+	if h.Count <= 0 {
+		return
+	}
+
+	maxBucketDigitLen := len(strconv.FormatFloat(h.Buckets[len(h.Buckets)-1].LowBound, 'f', 6, 64))
+	if maxBucketDigitLen < 3 {
+		// For "inf".
+		maxBucketDigitLen = 3
+	}
+	maxCountDigitLen := len(strconv.FormatInt(h.Count, 10))
+	percentMulti := 100 / float64(h.Count)
+
+	accCount := int64(0)
+	for i, b := range h.Buckets {
+		fmt.Fprintf(w, "[%*f, ", maxBucketDigitLen, b.LowBound)
+		if i+1 < len(h.Buckets) {
+			fmt.Fprintf(w, "%*f)", maxBucketDigitLen, h.Buckets[i+1].LowBound)
+		} else {
+			fmt.Fprintf(w, "%*s)", maxBucketDigitLen, "inf")
+		}
+
+		accCount += b.Count
+		fmt.Fprintf(w, "  %*d  %5.1f%%  %5.1f%%", maxCountDigitLen, b.Count, float64(b.Count)*percentMulti, float64(accCount)*percentMulti)
+
+		const barScale = 0.1
+		barLength := int(float64(b.Count)*percentMulti*barScale + 0.5)
+		fmt.Fprintf(w, "  %s\n", strings.Repeat("#", barLength))
+	}
+}
+
+// String returns the textual output of the histogram values as string.
+func (h *Histogram) String() string {
+	var b bytes.Buffer
+	h.Print(&b)
+	return b.String()
+}
+
+// Clear resets all the content of histogram.
+func (h *Histogram) Clear() {
+	h.Count = 0
+	h.Sum = 0
+	h.SumOfSquares = 0
+	h.Min = math.MaxInt64
+	h.Max = math.MinInt64
+	for i := range h.Buckets {
+		h.Buckets[i].Count = 0
+	}
+}
+
+// Opts returns a copy of the options used to create the Histogram.
+func (h *Histogram) Opts() HistogramOptions {
+	return h.opts
+}
+
+// Add adds a value to the histogram.
+func (h *Histogram) Add(value int64) error {
+	bucket, err := h.findBucket(value)
+	if err != nil {
+		return err
+	}
+	h.Buckets[bucket].Count++
+	h.Count++
+	h.Sum += value
+	h.SumOfSquares += value * value
+	if value < h.Min {
+		h.Min = value
+	}
+	if value > h.Max {
+		h.Max = value
+	}
+	return nil
+}
+
+func (h *Histogram) findBucket(value int64) (int, error) {
+	delta := float64(value - h.opts.MinValue)
+	var b int
+	if delta >= h.opts.BaseBucketSize {
+		// b = log_{1+growthFactor} (delta / baseBucketSize) + 1
+		//   = log(delta / baseBucketSize) / log(1+growthFactor) + 1
+		//   = (log(delta) - log(baseBucketSize)) * (1 / log(1+growthFactor)) + 1
+		b = int((math.Log(delta)-h.logBaseBucketSize)*h.oneOverLogOnePlusGrowthFactor + 1)
+	}
+	if b >= len(h.Buckets) {
+		return 0, fmt.Errorf("no bucket for value: %d", value)
+	}
+	return b, nil
+}
+
+// Merge takes another histogram h2, and merges its content into h.
+// The two histograms must be created by equivalent HistogramOptions.
+func (h *Histogram) Merge(h2 *Histogram) {
+	if h.opts != h2.opts {
+		log.Fatalf("failed to merge histograms, created by inequivalent options")
+	}
+	h.Count += h2.Count
+	h.Sum += h2.Sum
+	h.SumOfSquares += h2.SumOfSquares
+	if h2.Min < h.Min {
+		h.Min = h2.Min
+	}
+	if h2.Max > h.Max {
+		h.Max = h2.Max
+	}
+	for i, b := range h2.Buckets {
+		h.Buckets[i].Count += b.Count
+	}
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/stats/stats.go b/vendor/google.golang.org/grpc/benchmark/stats/stats.go
new file mode 100644
index 00000000000..e0edb174072
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/stats/stats.go
@@ -0,0 +1,116 @@
+package stats
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"time"
+)
+
+// Stats is a simple helper for gathering additional statistics like histogram
+// during benchmarks. This is not thread safe.
+type Stats struct {
+	numBuckets int
+	unit       time.Duration
+	min, max   int64
+	histogram  *Histogram
+
+	durations durationSlice
+	dirty     bool
+}
+
+type durationSlice []time.Duration
+
+// NewStats creates a new Stats instance. If numBuckets is not positive,
+// the default value (16) will be used.
+func NewStats(numBuckets int) *Stats {
+	if numBuckets <= 0 {
+		numBuckets = 16
+	}
+	return &Stats{
+		// Use one more bucket for the last unbounded bucket.
+		numBuckets: numBuckets + 1,
+		durations:  make(durationSlice, 0, 100000),
+	}
+}
+
+// Add adds an elapsed time per operation to the stats.
+func (stats *Stats) Add(d time.Duration) {
+	stats.durations = append(stats.durations, d)
+	stats.dirty = true
+}
+
+// Clear resets the stats, removing all values.
+func (stats *Stats) Clear() {
+	stats.durations = stats.durations[:0]
+	stats.histogram = nil
+	stats.dirty = false
+}
+
+// maybeUpdate updates internal stat data if there was any newly added
+// stats since this was updated.
+func (stats *Stats) maybeUpdate() {
+	if !stats.dirty {
+		return
+	}
+
+	stats.min = math.MaxInt64
+	stats.max = 0
+	for _, d := range stats.durations {
+		if stats.min > int64(d) {
+			stats.min = int64(d)
+		}
+		if stats.max < int64(d) {
+			stats.max = int64(d)
+		}
+	}
+
+	// Use the largest unit that can represent the minimum time duration.
+	stats.unit = time.Nanosecond
+	for _, u := range []time.Duration{time.Microsecond, time.Millisecond, time.Second} {
+		if stats.min <= int64(u) {
+			break
+		}
+		stats.unit = u
+	}
+
+	// Adjust the min/max according to the new unit.
+	stats.min /= int64(stats.unit)
+	stats.max /= int64(stats.unit)
+	numBuckets := stats.numBuckets
+	if n := int(stats.max - stats.min + 1); n < numBuckets {
+		numBuckets = n
+	}
+	stats.histogram = NewHistogram(HistogramOptions{
+		NumBuckets: numBuckets,
+		// max-min(lower bound of last bucket) = (1 + growthFactor)^(numBuckets-2) * baseBucketSize.
+		GrowthFactor:   math.Pow(float64(stats.max-stats.min), 1/float64(numBuckets-2)) - 1,
+		BaseBucketSize: 1.0,
+		MinValue:       stats.min})
+
+	for _, d := range stats.durations {
+		stats.histogram.Add(int64(d / stats.unit))
+	}
+
+	stats.dirty = false
+}
+
+// Print writes textual output of the Stats.
+func (stats *Stats) Print(w io.Writer) {
+	stats.maybeUpdate()
+
+	if stats.histogram == nil {
+		fmt.Fprint(w, "Histogram (empty)\n")
+	} else {
+		fmt.Fprintf(w, "Histogram (unit: %s)\n", fmt.Sprintf("%v", stats.unit)[1:])
+		stats.histogram.Print(w)
+	}
+}
+
+// String returns the textual output of the Stats as string.
+func (stats *Stats) String() string {
+	var b bytes.Buffer
+	stats.Print(&b)
+	return b.String()
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/stats/util.go b/vendor/google.golang.org/grpc/benchmark/stats/util.go
new file mode 100644
index 00000000000..a9922f985f3
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/stats/util.go
@@ -0,0 +1,191 @@
+package stats
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"os"
+	"runtime"
+	"sort"
+	"strings"
+	"sync"
+	"testing"
+)
+
+var (
+	curB         *testing.B
+	curBenchName string
+	curStats     map[string]*Stats
+
+	orgStdout  *os.File
+	nextOutPos int
+
+	injectCond *sync.Cond
+	injectDone chan struct{}
+)
+
+// AddStats adds a new unnamed Stats instance to the current benchmark. You need
+// to run benchmarks by calling RunTestMain() to inject the stats to the
+// benchmark results. If numBuckets is not positive, the default value (16) will
+// be used. Please note that this calls b.ResetTimer() since it may be blocked
+// until the previous benchmark stats is printed out. So AddStats() should
+// typically be called at the very beginning of each benchmark function.
+func AddStats(b *testing.B, numBuckets int) *Stats {
+	return AddStatsWithName(b, "", numBuckets)
+}
+
+// AddStatsWithName adds a new named Stats instance to the current benchmark.
+// With this, you can add multiple stats in a single benchmark. You need
+// to run benchmarks by calling RunTestMain() to inject the stats to the
+// benchmark results. If numBuckets is not positive, the default value (16) will
+// be used. Please note that this calls b.ResetTimer() since it may be blocked
+// until the previous benchmark stats is printed out. So AddStatsWithName()
+// should typically be called at the very beginning of each benchmark function.
+func AddStatsWithName(b *testing.B, name string, numBuckets int) *Stats {
+	var benchName string
+	for i := 1; ; i++ {
+		pc, _, _, ok := runtime.Caller(i)
+		if !ok {
+			panic("benchmark function not found")
+		}
+		p := strings.Split(runtime.FuncForPC(pc).Name(), ".")
+		benchName = p[len(p)-1]
+		if strings.HasPrefix(benchName, "Benchmark") {
+			break
+		}
+	}
+	procs := runtime.GOMAXPROCS(-1)
+	if procs != 1 {
+		benchName = fmt.Sprintf("%s-%d", benchName, procs)
+	}
+
+	stats := NewStats(numBuckets)
+
+	if injectCond != nil {
+		// We need to wait until the previous benchmark stats is printed out.
+		injectCond.L.Lock()
+		for curB != nil && curBenchName != benchName {
+			injectCond.Wait()
+		}
+
+		curB = b
+		curBenchName = benchName
+		curStats[name] = stats
+
+		injectCond.L.Unlock()
+	}
+
+	b.ResetTimer()
+	return stats
+}
+
+// RunTestMain runs the tests with enabling injection of benchmark stats. It
+// returns an exit code to pass to os.Exit.
+func RunTestMain(m *testing.M) int {
+	startStatsInjector()
+	defer stopStatsInjector()
+	return m.Run()
+}
+
+// startStatsInjector starts stats injection to benchmark results.
+func startStatsInjector() {
+	orgStdout = os.Stdout
+	r, w, _ := os.Pipe()
+	os.Stdout = w
+	nextOutPos = 0
+
+	resetCurBenchStats()
+
+	injectCond = sync.NewCond(&sync.Mutex{})
+	injectDone = make(chan struct{})
+	go func() {
+		defer close(injectDone)
+
+		scanner := bufio.NewScanner(r)
+		scanner.Split(splitLines)
+		for scanner.Scan() {
+			injectStatsIfFinished(scanner.Text())
+		}
+		if err := scanner.Err(); err != nil {
+			panic(err)
+		}
+	}()
+}
+
+// stopStatsInjector stops stats injection and restores os.Stdout.
+func stopStatsInjector() {
+	os.Stdout.Close()
+	<-injectDone
+	injectCond = nil
+	os.Stdout = orgStdout
+}
+
+// splitLines is a split function for a bufio.Scanner that returns each line
+// of text, teeing texts to the original stdout even before each line ends.
+func splitLines(data []byte, eof bool) (advance int, token []byte, err error) {
+	if eof && len(data) == 0 {
+		return 0, nil, nil
+	}
+
+	if i := bytes.IndexByte(data, '\n'); i >= 0 {
+		orgStdout.Write(data[nextOutPos : i+1])
+		nextOutPos = 0
+		return i + 1, data[0:i], nil
+	}
+
+	orgStdout.Write(data[nextOutPos:])
+	nextOutPos = len(data)
+
+	if eof {
+		// This is a final, non-terminated line. Return it.
+		return len(data), data, nil
+	}
+
+	return 0, nil, nil
+}
+
+// injectStatsIfFinished prints out the stats if the current benchmark finishes.
+func injectStatsIfFinished(line string) {
+	injectCond.L.Lock()
+	defer injectCond.L.Unlock()
+
+	// We assume that the benchmark results start with the benchmark name.
+	if curB == nil || !strings.HasPrefix(line, curBenchName) {
+		return
+	}
+
+	if !curB.Failed() {
+		// Output all stats in alphabetical order.
+		names := make([]string, 0, len(curStats))
+		for name := range curStats {
+			names = append(names, name)
+		}
+		sort.Strings(names)
+		for _, name := range names {
+			stats := curStats[name]
+			// The output of stats starts with a header like "Histogram (unit: ms)"
+			// followed by statistical properties and the buckets. Add the stats name
+			// if it is a named stats and indent them as Go testing outputs.
+			lines := strings.Split(stats.String(), "\n")
+			if n := len(lines); n > 0 {
+				if name != "" {
+					name = ": " + name
+				}
+				fmt.Fprintf(orgStdout, "--- %s%s\n", lines[0], name)
+				for _, line := range lines[1 : n-1] {
+					fmt.Fprintf(orgStdout, "\t%s\n", line)
+				}
+			}
+		}
+	}
+
+	resetCurBenchStats()
+	injectCond.Signal()
+}
+
+// resetCurBenchStats resets the current benchmark stats.
+func resetCurBenchStats() {
+	curB = nil
+	curBenchName = ""
+	curStats = make(map[string]*Stats)
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/worker/benchmark_client.go b/vendor/google.golang.org/grpc/benchmark/worker/benchmark_client.go
new file mode 100644
index 00000000000..199bbe1fa39
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/worker/benchmark_client.go
@@ -0,0 +1,388 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"math"
+	"runtime"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/benchmark"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/benchmark/stats"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	caFile = "benchmark/server/testdata/ca.pem"
+)
+
+type lockingHistogram struct {
+	mu        sync.Mutex
+	histogram *stats.Histogram
+}
+
+func (h *lockingHistogram) add(value int64) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	h.histogram.Add(value)
+}
+
+// swap sets h.histogram to new, and returns its old value.
+func (h *lockingHistogram) swap(new *stats.Histogram) *stats.Histogram {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	old := h.histogram
+	h.histogram = new
+	return old
+}
+
+func (h *lockingHistogram) mergeInto(merged *stats.Histogram) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	merged.Merge(h.histogram)
+}
+
+type benchmarkClient struct {
+	closeConns        func()
+	stop              chan bool
+	lastResetTime     time.Time
+	histogramOptions  stats.HistogramOptions
+	lockingHistograms []lockingHistogram
+}
+
+func printClientConfig(config *testpb.ClientConfig) {
+	// Some config options are ignored:
+	// - client type:
+	//     will always create sync client
+	// - async client threads.
+	// - core list
+	grpclog.Printf(" * client type: %v (ignored, always creates sync client)", config.ClientType)
+	grpclog.Printf(" * async client threads: %v (ignored)", config.AsyncClientThreads)
+	// TODO: use cores specified by CoreList when setting list of cores is supported in go.
+	grpclog.Printf(" * core list: %v (ignored)", config.CoreList)
+
+	grpclog.Printf(" - security params: %v", config.SecurityParams)
+	grpclog.Printf(" - core limit: %v", config.CoreLimit)
+	grpclog.Printf(" - payload config: %v", config.PayloadConfig)
+	grpclog.Printf(" - rpcs per chann: %v", config.OutstandingRpcsPerChannel)
+	grpclog.Printf(" - channel number: %v", config.ClientChannels)
+	grpclog.Printf(" - load params: %v", config.LoadParams)
+	grpclog.Printf(" - rpc type: %v", config.RpcType)
+	grpclog.Printf(" - histogram params: %v", config.HistogramParams)
+	grpclog.Printf(" - server targets: %v", config.ServerTargets)
+}
+
+func setupClientEnv(config *testpb.ClientConfig) {
+	// Use all cpu cores available on machine by default.
+	// TODO: Revisit this for the optimal default setup.
+	if config.CoreLimit > 0 {
+		runtime.GOMAXPROCS(int(config.CoreLimit))
+	} else {
+		runtime.GOMAXPROCS(runtime.NumCPU())
+	}
+}
+
+// createConns creates connections according to given config.
+// It returns the connections and corresponding function to close them.
+// It returns non-nil error if there is anything wrong.
+func createConns(config *testpb.ClientConfig) ([]*grpc.ClientConn, func(), error) {
+	var opts []grpc.DialOption
+
+	// Sanity check for client type.
+	switch config.ClientType {
+	case testpb.ClientType_SYNC_CLIENT:
+	case testpb.ClientType_ASYNC_CLIENT:
+	default:
+		return nil, nil, grpc.Errorf(codes.InvalidArgument, "unknow client type: %v", config.ClientType)
+	}
+
+	// Check and set security options.
+	if config.SecurityParams != nil {
+		creds, err := credentials.NewClientTLSFromFile(abs(caFile), config.SecurityParams.ServerHostOverride)
+		if err != nil {
+			return nil, nil, grpc.Errorf(codes.InvalidArgument, "failed to create TLS credentials %v", err)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+
+	// Use byteBufCodec if it is required.
+	if config.PayloadConfig != nil {
+		switch config.PayloadConfig.Payload.(type) {
+		case *testpb.PayloadConfig_BytebufParams:
+			opts = append(opts, grpc.WithCodec(byteBufCodec{}))
+		case *testpb.PayloadConfig_SimpleParams:
+		default:
+			return nil, nil, grpc.Errorf(codes.InvalidArgument, "unknow payload config: %v", config.PayloadConfig)
+		}
+	}
+
+	// Create connections.
+	connCount := int(config.ClientChannels)
+	conns := make([]*grpc.ClientConn, connCount, connCount)
+	for connIndex := 0; connIndex < connCount; connIndex++ {
+		conns[connIndex] = benchmark.NewClientConn(config.ServerTargets[connIndex%len(config.ServerTargets)], opts...)
+	}
+
+	return conns, func() {
+		for _, conn := range conns {
+			conn.Close()
+		}
+	}, nil
+}
+
+func performRPCs(config *testpb.ClientConfig, conns []*grpc.ClientConn, bc *benchmarkClient) error {
+	// Read payload size and type from config.
+	var (
+		payloadReqSize, payloadRespSize int
+		payloadType                     string
+	)
+	if config.PayloadConfig != nil {
+		switch c := config.PayloadConfig.Payload.(type) {
+		case *testpb.PayloadConfig_BytebufParams:
+			payloadReqSize = int(c.BytebufParams.ReqSize)
+			payloadRespSize = int(c.BytebufParams.RespSize)
+			payloadType = "bytebuf"
+		case *testpb.PayloadConfig_SimpleParams:
+			payloadReqSize = int(c.SimpleParams.ReqSize)
+			payloadRespSize = int(c.SimpleParams.RespSize)
+			payloadType = "protobuf"
+		default:
+			return grpc.Errorf(codes.InvalidArgument, "unknow payload config: %v", config.PayloadConfig)
+		}
+	}
+
+	// TODO add open loop distribution.
+	switch config.LoadParams.Load.(type) {
+	case *testpb.LoadParams_ClosedLoop:
+	case *testpb.LoadParams_Poisson:
+		return grpc.Errorf(codes.Unimplemented, "unsupported load params: %v", config.LoadParams)
+	default:
+		return grpc.Errorf(codes.InvalidArgument, "unknown load params: %v", config.LoadParams)
+	}
+
+	rpcCountPerConn := int(config.OutstandingRpcsPerChannel)
+
+	switch config.RpcType {
+	case testpb.RpcType_UNARY:
+		bc.doCloseLoopUnary(conns, rpcCountPerConn, payloadReqSize, payloadRespSize)
+		// TODO open loop.
+	case testpb.RpcType_STREAMING:
+		bc.doCloseLoopStreaming(conns, rpcCountPerConn, payloadReqSize, payloadRespSize, payloadType)
+		// TODO open loop.
+	default:
+		return grpc.Errorf(codes.InvalidArgument, "unknown rpc type: %v", config.RpcType)
+	}
+
+	return nil
+}
+
+func startBenchmarkClient(config *testpb.ClientConfig) (*benchmarkClient, error) {
+	printClientConfig(config)
+
+	// Set running environment like how many cores to use.
+	setupClientEnv(config)
+
+	conns, closeConns, err := createConns(config)
+	if err != nil {
+		return nil, err
+	}
+
+	rpcCountPerConn := int(config.OutstandingRpcsPerChannel)
+	bc := &benchmarkClient{
+		histogramOptions: stats.HistogramOptions{
+			NumBuckets:     int(math.Log(config.HistogramParams.MaxPossible)/math.Log(1+config.HistogramParams.Resolution)) + 1,
+			GrowthFactor:   config.HistogramParams.Resolution,
+			BaseBucketSize: (1 + config.HistogramParams.Resolution),
+			MinValue:       0,
+		},
+		lockingHistograms: make([]lockingHistogram, rpcCountPerConn*len(conns), rpcCountPerConn*len(conns)),
+
+		stop:          make(chan bool),
+		lastResetTime: time.Now(),
+		closeConns:    closeConns,
+	}
+
+	if err = performRPCs(config, conns, bc); err != nil {
+		// Close all connections if performRPCs failed.
+		closeConns()
+		return nil, err
+	}
+
+	return bc, nil
+}
+
+func (bc *benchmarkClient) doCloseLoopUnary(conns []*grpc.ClientConn, rpcCountPerConn int, reqSize int, respSize int) {
+	for ic, conn := range conns {
+		client := testpb.NewBenchmarkServiceClient(conn)
+		// For each connection, create rpcCountPerConn goroutines to do rpc.
+		for j := 0; j < rpcCountPerConn; j++ {
+			// Create histogram for each goroutine.
+			idx := ic*rpcCountPerConn + j
+			bc.lockingHistograms[idx].histogram = stats.NewHistogram(bc.histogramOptions)
+			// Start goroutine on the created mutex and histogram.
+			go func(idx int) {
+				// TODO: do warm up if necessary.
+				// Now relying on worker client to reserve time to do warm up.
+				// The worker client needs to wait for some time after client is created,
+				// before starting benchmark.
+				done := make(chan bool)
+				for {
+					go func() {
+						start := time.Now()
+						if err := benchmark.DoUnaryCall(client, reqSize, respSize); err != nil {
+							select {
+							case <-bc.stop:
+							case done <- false:
+							}
+							return
+						}
+						elapse := time.Since(start)
+						bc.lockingHistograms[idx].add(int64(elapse))
+						select {
+						case <-bc.stop:
+						case done <- true:
+						}
+					}()
+					select {
+					case <-bc.stop:
+						return
+					case <-done:
+					}
+				}
+			}(idx)
+		}
+	}
+}
+
+func (bc *benchmarkClient) doCloseLoopStreaming(conns []*grpc.ClientConn, rpcCountPerConn int, reqSize int, respSize int, payloadType string) {
+	var doRPC func(testpb.BenchmarkService_StreamingCallClient, int, int) error
+	if payloadType == "bytebuf" {
+		doRPC = benchmark.DoByteBufStreamingRoundTrip
+	} else {
+		doRPC = benchmark.DoStreamingRoundTrip
+	}
+	for ic, conn := range conns {
+		// For each connection, create rpcCountPerConn goroutines to do rpc.
+		for j := 0; j < rpcCountPerConn; j++ {
+			c := testpb.NewBenchmarkServiceClient(conn)
+			stream, err := c.StreamingCall(context.Background())
+			if err != nil {
+				grpclog.Fatalf("%v.StreamingCall(_) = _, %v", c, err)
+			}
+			// Create histogram for each goroutine.
+			idx := ic*rpcCountPerConn + j
+			bc.lockingHistograms[idx].histogram = stats.NewHistogram(bc.histogramOptions)
+			// Start goroutine on the created mutex and histogram.
+			go func(idx int) {
+				// TODO: do warm up if necessary.
+				// Now relying on worker client to reserve time to do warm up.
+				// The worker client needs to wait for some time after client is created,
+				// before starting benchmark.
+				for {
+					start := time.Now()
+					if err := doRPC(stream, reqSize, respSize); err != nil {
+						return
+					}
+					elapse := time.Since(start)
+					bc.lockingHistograms[idx].add(int64(elapse))
+					select {
+					case <-bc.stop:
+						return
+					default:
+					}
+				}
+			}(idx)
+		}
+	}
+}
+
+// getStats returns the stats for benchmark client.
+// It resets lastResetTime and all histograms if argument reset is true.
+func (bc *benchmarkClient) getStats(reset bool) *testpb.ClientStats {
+	var timeElapsed float64
+	mergedHistogram := stats.NewHistogram(bc.histogramOptions)
+
+	if reset {
+		// Merging histogram may take some time.
+		// Put all histograms aside and merge later.
+		toMerge := make([]*stats.Histogram, len(bc.lockingHistograms), len(bc.lockingHistograms))
+		for i := range bc.lockingHistograms {
+			toMerge[i] = bc.lockingHistograms[i].swap(stats.NewHistogram(bc.histogramOptions))
+		}
+
+		for i := 0; i < len(toMerge); i++ {
+			mergedHistogram.Merge(toMerge[i])
+		}
+
+		timeElapsed = time.Since(bc.lastResetTime).Seconds()
+		bc.lastResetTime = time.Now()
+	} else {
+		// Merge only, not reset.
+		for i := range bc.lockingHistograms {
+			bc.lockingHistograms[i].mergeInto(mergedHistogram)
+		}
+		timeElapsed = time.Since(bc.lastResetTime).Seconds()
+	}
+
+	b := make([]uint32, len(mergedHistogram.Buckets), len(mergedHistogram.Buckets))
+	for i, v := range mergedHistogram.Buckets {
+		b[i] = uint32(v.Count)
+	}
+	return &testpb.ClientStats{
+		Latencies: &testpb.HistogramData{
+			Bucket:       b,
+			MinSeen:      float64(mergedHistogram.Min),
+			MaxSeen:      float64(mergedHistogram.Max),
+			Sum:          float64(mergedHistogram.Sum),
+			SumOfSquares: float64(mergedHistogram.SumOfSquares),
+			Count:        float64(mergedHistogram.Count),
+		},
+		TimeElapsed: timeElapsed,
+		TimeUser:    0,
+		TimeSystem:  0,
+	}
+}
+
+func (bc *benchmarkClient) shutdown() {
+	close(bc.stop)
+	bc.closeConns()
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/worker/benchmark_server.go b/vendor/google.golang.org/grpc/benchmark/worker/benchmark_server.go
new file mode 100644
index 00000000000..667ef2c17d1
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/worker/benchmark_server.go
@@ -0,0 +1,173 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/benchmark"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	// File path related to google.golang.org/grpc.
+	certFile = "benchmark/server/testdata/server1.pem"
+	keyFile  = "benchmark/server/testdata/server1.key"
+)
+
+type benchmarkServer struct {
+	port          int
+	cores         int
+	closeFunc     func()
+	mu            sync.RWMutex
+	lastResetTime time.Time
+}
+
+func printServerConfig(config *testpb.ServerConfig) {
+	// Some config options are ignored:
+	// - server type:
+	//     will always start sync server
+	// - async server threads
+	// - core list
+	grpclog.Printf(" * server type: %v (ignored, always starts sync server)", config.ServerType)
+	grpclog.Printf(" * async server threads: %v (ignored)", config.AsyncServerThreads)
+	// TODO: use cores specified by CoreList when setting list of cores is supported in go.
+	grpclog.Printf(" * core list: %v (ignored)", config.CoreList)
+
+	grpclog.Printf(" - security params: %v", config.SecurityParams)
+	grpclog.Printf(" - core limit: %v", config.CoreLimit)
+	grpclog.Printf(" - port: %v", config.Port)
+	grpclog.Printf(" - payload config: %v", config.PayloadConfig)
+}
+
+func startBenchmarkServer(config *testpb.ServerConfig, serverPort int) (*benchmarkServer, error) {
+	printServerConfig(config)
+
+	// Use all cpu cores available on machine by default.
+	// TODO: Revisit this for the optimal default setup.
+	numOfCores := runtime.NumCPU()
+	if config.CoreLimit > 0 {
+		numOfCores = int(config.CoreLimit)
+	}
+	runtime.GOMAXPROCS(numOfCores)
+
+	var opts []grpc.ServerOption
+
+	// Sanity check for server type.
+	switch config.ServerType {
+	case testpb.ServerType_SYNC_SERVER:
+	case testpb.ServerType_ASYNC_SERVER:
+	case testpb.ServerType_ASYNC_GENERIC_SERVER:
+	default:
+		return nil, grpc.Errorf(codes.InvalidArgument, "unknow server type: %v", config.ServerType)
+	}
+
+	// Set security options.
+	if config.SecurityParams != nil {
+		creds, err := credentials.NewServerTLSFromFile(abs(certFile), abs(keyFile))
+		if err != nil {
+			grpclog.Fatalf("failed to generate credentials %v", err)
+		}
+		opts = append(opts, grpc.Creds(creds))
+	}
+
+	// Priority: config.Port > serverPort > default (0).
+	port := int(config.Port)
+	if port == 0 {
+		port = serverPort
+	}
+
+	// Create different benchmark server according to config.
+	var (
+		addr      string
+		closeFunc func()
+		err       error
+	)
+	if config.PayloadConfig != nil {
+		switch payload := config.PayloadConfig.Payload.(type) {
+		case *testpb.PayloadConfig_BytebufParams:
+			opts = append(opts, grpc.CustomCodec(byteBufCodec{}))
+			addr, closeFunc = benchmark.StartServer(benchmark.ServerInfo{
+				Addr:     ":" + strconv.Itoa(port),
+				Type:     "bytebuf",
+				Metadata: payload.BytebufParams.RespSize,
+			}, opts...)
+		case *testpb.PayloadConfig_SimpleParams:
+			addr, closeFunc = benchmark.StartServer(benchmark.ServerInfo{
+				Addr: ":" + strconv.Itoa(port),
+				Type: "protobuf",
+			}, opts...)
+		case *testpb.PayloadConfig_ComplexParams:
+			return nil, grpc.Errorf(codes.Unimplemented, "unsupported payload config: %v", config.PayloadConfig)
+		default:
+			return nil, grpc.Errorf(codes.InvalidArgument, "unknow payload config: %v", config.PayloadConfig)
+		}
+	} else {
+		// Start protobuf server if payload config is nil.
+		addr, closeFunc = benchmark.StartServer(benchmark.ServerInfo{
+			Addr: ":" + strconv.Itoa(port),
+			Type: "protobuf",
+		}, opts...)
+	}
+
+	grpclog.Printf("benchmark server listening at %v", addr)
+	addrSplitted := strings.Split(addr, ":")
+	p, err := strconv.Atoi(addrSplitted[len(addrSplitted)-1])
+	if err != nil {
+		grpclog.Fatalf("failed to get port number from server address: %v", err)
+	}
+
+	return &benchmarkServer{port: p, cores: numOfCores, closeFunc: closeFunc, lastResetTime: time.Now()}, nil
+}
+
+// getStats returns the stats for benchmark server.
+// It resets lastResetTime if argument reset is true.
+func (bs *benchmarkServer) getStats(reset bool) *testpb.ServerStats {
+	// TODO wall time, sys time, user time.
+	bs.mu.RLock()
+	defer bs.mu.RUnlock()
+	timeElapsed := time.Since(bs.lastResetTime).Seconds()
+	if reset {
+		bs.lastResetTime = time.Now()
+	}
+	return &testpb.ServerStats{TimeElapsed: timeElapsed, TimeUser: 0, TimeSystem: 0}
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/worker/main.go b/vendor/google.golang.org/grpc/benchmark/worker/main.go
new file mode 100644
index 00000000000..17c52519bbe
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/worker/main.go
@@ -0,0 +1,231 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"net"
+	"runtime"
+	"strconv"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	testpb "google.golang.org/grpc/benchmark/grpc_testing"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	driverPort = flag.Int("driver_port", 10000, "port for communication with driver")
+	serverPort = flag.Int("server_port", 0, "port for benchmark server if not specified by server config message")
+)
+
+type byteBufCodec struct {
+}
+
+func (byteBufCodec) Marshal(v interface{}) ([]byte, error) {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
+	}
+	return *b, nil
+}
+
+func (byteBufCodec) Unmarshal(data []byte, v interface{}) error {
+	b, ok := v.(*[]byte)
+	if !ok {
+		return fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
+	}
+	*b = data
+	return nil
+}
+
+func (byteBufCodec) String() string {
+	return "bytebuffer"
+}
+
+// workerServer implements WorkerService rpc handlers.
+// It can create benchmarkServer or benchmarkClient on demand.
+type workerServer struct {
+	stop       chan<- bool
+	serverPort int
+}
+
+func (s *workerServer) RunServer(stream testpb.WorkerService_RunServerServer) error {
+	var bs *benchmarkServer
+	defer func() {
+		// Close benchmark server when stream ends.
+		grpclog.Printf("closing benchmark server")
+		if bs != nil {
+			bs.closeFunc()
+		}
+	}()
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		var out *testpb.ServerStatus
+		switch argtype := in.Argtype.(type) {
+		case *testpb.ServerArgs_Setup:
+			grpclog.Printf("server setup received:")
+			if bs != nil {
+				grpclog.Printf("server setup received when server already exists, closing the existing server")
+				bs.closeFunc()
+			}
+			bs, err = startBenchmarkServer(argtype.Setup, s.serverPort)
+			if err != nil {
+				return err
+			}
+			out = &testpb.ServerStatus{
+				Stats: bs.getStats(false),
+				Port:  int32(bs.port),
+				Cores: int32(bs.cores),
+			}
+
+		case *testpb.ServerArgs_Mark:
+			grpclog.Printf("server mark received:")
+			grpclog.Printf(" - %v", argtype)
+			if bs == nil {
+				return grpc.Errorf(codes.InvalidArgument, "server does not exist when mark received")
+			}
+			out = &testpb.ServerStatus{
+				Stats: bs.getStats(argtype.Mark.Reset_),
+				Port:  int32(bs.port),
+				Cores: int32(bs.cores),
+			}
+		}
+
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}
+
+func (s *workerServer) RunClient(stream testpb.WorkerService_RunClientServer) error {
+	var bc *benchmarkClient
+	defer func() {
+		// Shut down benchmark client when stream ends.
+		grpclog.Printf("shuting down benchmark client")
+		if bc != nil {
+			bc.shutdown()
+		}
+	}()
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		var out *testpb.ClientStatus
+		switch t := in.Argtype.(type) {
+		case *testpb.ClientArgs_Setup:
+			grpclog.Printf("client setup received:")
+			if bc != nil {
+				grpclog.Printf("client setup received when client already exists, shuting down the existing client")
+				bc.shutdown()
+			}
+			bc, err = startBenchmarkClient(t.Setup)
+			if err != nil {
+				return err
+			}
+			out = &testpb.ClientStatus{
+				Stats: bc.getStats(false),
+			}
+
+		case *testpb.ClientArgs_Mark:
+			grpclog.Printf("client mark received:")
+			grpclog.Printf(" - %v", t)
+			if bc == nil {
+				return grpc.Errorf(codes.InvalidArgument, "client does not exist when mark received")
+			}
+			out = &testpb.ClientStatus{
+				Stats: bc.getStats(t.Mark.Reset_),
+			}
+		}
+
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}
+
+func (s *workerServer) CoreCount(ctx context.Context, in *testpb.CoreRequest) (*testpb.CoreResponse, error) {
+	grpclog.Printf("core count: %v", runtime.NumCPU())
+	return &testpb.CoreResponse{Cores: int32(runtime.NumCPU())}, nil
+}
+
+func (s *workerServer) QuitWorker(ctx context.Context, in *testpb.Void) (*testpb.Void, error) {
+	grpclog.Printf("quiting worker")
+	s.stop <- true
+	return &testpb.Void{}, nil
+}
+
+func main() {
+	grpc.EnableTracing = false
+
+	flag.Parse()
+	lis, err := net.Listen("tcp", ":"+strconv.Itoa(*driverPort))
+	if err != nil {
+		grpclog.Fatalf("failed to listen: %v", err)
+	}
+	grpclog.Printf("worker listening at port %v", *driverPort)
+
+	s := grpc.NewServer()
+	stop := make(chan bool)
+	testpb.RegisterWorkerServiceServer(s, &workerServer{
+		stop:       stop,
+		serverPort: *serverPort,
+	})
+
+	go func() {
+		<-stop
+		// Wait for 1 second before stopping the server to make sure the return value of QuitWorker is sent to client.
+		// TODO revise this once server graceful stop is supported in gRPC.
+		time.Sleep(time.Second)
+		s.Stop()
+	}()
+
+	s.Serve(lis)
+}
diff --git a/vendor/google.golang.org/grpc/benchmark/worker/util.go b/vendor/google.golang.org/grpc/benchmark/worker/util.go
new file mode 100644
index 00000000000..f0016ce49f9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/benchmark/worker/util.go
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+)
+
+// abs returns the absolute path the given relative file or directory path,
+// relative to the google.golang.org/grpc directory in the user's GOPATH.
+// If rel is already absolute, it is returned unmodified.
+func abs(rel string) string {
+	if filepath.IsAbs(rel) {
+		return rel
+	}
+	v, err := goPackagePath("google.golang.org/grpc")
+	if err != nil {
+		log.Fatalf("Error finding google.golang.org/grpc/testdata directory: %v", err)
+	}
+	return filepath.Join(v, rel)
+}
+
+func goPackagePath(pkg string) (path string, err error) {
+	gp := os.Getenv("GOPATH")
+	if gp == "" {
+		return path, os.ErrNotExist
+	}
+	for _, p := range filepath.SplitList(gp) {
+		dir := filepath.Join(p, "src", filepath.FromSlash(pkg))
+		fi, err := os.Stat(dir)
+		if os.IsNotExist(err) {
+			continue
+		}
+		if err != nil {
+			return "", err
+		}
+		if !fi.IsDir() {
+			continue
+		}
+		return dir, nil
+	}
+	return path, os.ErrNotExist
+}
diff --git a/vendor/google.golang.org/grpc/call.go b/vendor/google.golang.org/grpc/call.go
new file mode 100644
index 00000000000..c1588c6375c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/call.go
@@ -0,0 +1,289 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"io"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/trace"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/transport"
+)
+
+// recvResponse receives and parses an RPC response.
+// On error, it returns the error and indicates whether the call should be retried.
+//
+// TODO(zhaoq): Check whether the received message sequence is valid.
+// TODO ctx is used for stats collection and processing. It is the context passed from the application.
+func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) {
+	// Try to acquire header metadata from the server if there is any.
+	defer func() {
+		if err != nil {
+			if _, ok := err.(transport.ConnectionError); !ok {
+				t.CloseStream(stream, err)
+			}
+		}
+	}()
+	c.headerMD, err = stream.Header()
+	if err != nil {
+		return
+	}
+	p := &parser{r: stream}
+	var inPayload *stats.InPayload
+	if dopts.copts.StatsHandler != nil {
+		inPayload = &stats.InPayload{
+			Client: true,
+		}
+	}
+	for {
+		if err = recv(p, dopts.codec, stream, dopts.dc, reply, dopts.maxMsgSize, inPayload); err != nil {
+			if err == io.EOF {
+				break
+			}
+			return
+		}
+	}
+	if inPayload != nil && err == io.EOF && stream.StatusCode() == codes.OK {
+		// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
+		// Fix the order if necessary.
+		dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
+	}
+	c.trailerMD = stream.Trailer()
+	if peer, ok := peer.FromContext(stream.Context()); ok {
+		c.peer = peer
+	}
+	return nil
+}
+
+// sendRequest writes out various information of an RPC such as Context and Message.
+func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, callHdr *transport.CallHdr, t transport.ClientTransport, args interface{}, opts *transport.Options) (_ *transport.Stream, err error) {
+	stream, err := t.NewStream(ctx, callHdr)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			// If err is connection error, t will be closed, no need to close stream here.
+			if _, ok := err.(transport.ConnectionError); !ok {
+				t.CloseStream(stream, err)
+			}
+		}
+	}()
+	var (
+		cbuf       *bytes.Buffer
+		outPayload *stats.OutPayload
+	)
+	if compressor != nil {
+		cbuf = new(bytes.Buffer)
+	}
+	if dopts.copts.StatsHandler != nil {
+		outPayload = &stats.OutPayload{
+			Client: true,
+		}
+	}
+	outBuf, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
+	if err != nil {
+		return nil, Errorf(codes.Internal, "grpc: %v", err)
+	}
+	err = t.Write(stream, outBuf, opts)
+	if err == nil && outPayload != nil {
+		outPayload.SentTime = time.Now()
+		dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
+	}
+	// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method
+	// does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following
+	// recvResponse to get the final status.
+	if err != nil && err != io.EOF {
+		return nil, err
+	}
+	// Sent successfully.
+	return stream, nil
+}
+
+// Invoke sends the RPC request on the wire and returns after response is received.
+// Invoke is called by generated code. Also users can call Invoke directly when it
+// is really needed in their use cases.
+func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
+	if cc.dopts.unaryInt != nil {
+		return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...)
+	}
+	return invoke(ctx, method, args, reply, cc, opts...)
+}
+
+func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
+	c := defaultCallInfo
+	if mc, ok := cc.getMethodConfig(method); ok {
+		c.failFast = !mc.WaitForReady
+		if mc.Timeout > 0 {
+			var cancel context.CancelFunc
+			ctx, cancel = context.WithTimeout(ctx, mc.Timeout)
+			defer cancel()
+		}
+	}
+	for _, o := range opts {
+		if err := o.before(&c); err != nil {
+			return toRPCErr(err)
+		}
+	}
+	defer func() {
+		for _, o := range opts {
+			o.after(&c)
+		}
+	}()
+	if EnableTracing {
+		c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
+		defer c.traceInfo.tr.Finish()
+		c.traceInfo.firstLine.client = true
+		if deadline, ok := ctx.Deadline(); ok {
+			c.traceInfo.firstLine.deadline = deadline.Sub(time.Now())
+		}
+		c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false)
+		// TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set.
+		defer func() {
+			if e != nil {
+				c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{e}}, true)
+				c.traceInfo.tr.SetError()
+			}
+		}()
+	}
+	sh := cc.dopts.copts.StatsHandler
+	if sh != nil {
+		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
+		begin := &stats.Begin{
+			Client:    true,
+			BeginTime: time.Now(),
+			FailFast:  c.failFast,
+		}
+		sh.HandleRPC(ctx, begin)
+	}
+	defer func() {
+		if sh != nil {
+			end := &stats.End{
+				Client:  true,
+				EndTime: time.Now(),
+				Error:   e,
+			}
+			sh.HandleRPC(ctx, end)
+		}
+	}()
+	topts := &transport.Options{
+		Last:  true,
+		Delay: false,
+	}
+	for {
+		var (
+			err    error
+			t      transport.ClientTransport
+			stream *transport.Stream
+			// Record the put handler from Balancer.Get(...). It is called once the
+			// RPC has completed or failed.
+			put func()
+		)
+		// TODO(zhaoq): Need a formal spec of fail-fast.
+		callHdr := &transport.CallHdr{
+			Host:   cc.authority,
+			Method: method,
+		}
+		if cc.dopts.cp != nil {
+			callHdr.SendCompress = cc.dopts.cp.Type()
+		}
+
+		gopts := BalancerGetOptions{
+			BlockingWait: !c.failFast,
+		}
+		t, put, err = cc.getTransport(ctx, gopts)
+		if err != nil {
+			// TODO(zhaoq): Probably revisit the error handling.
+			if _, ok := err.(*rpcError); ok {
+				return err
+			}
+			if err == errConnClosing || err == errConnUnavailable {
+				if c.failFast {
+					return Errorf(codes.Unavailable, "%v", err)
+				}
+				continue
+			}
+			// All the other errors are treated as Internal errors.
+			return Errorf(codes.Internal, "%v", err)
+		}
+		if c.traceInfo.tr != nil {
+			c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true)
+		}
+		stream, err = sendRequest(ctx, cc.dopts, cc.dopts.cp, callHdr, t, args, topts)
+		if err != nil {
+			if put != nil {
+				put()
+				put = nil
+			}
+			// Retry a non-failfast RPC when
+			// i) there is a connection error; or
+			// ii) the server started to drain before this RPC was initiated.
+			if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
+				if c.failFast {
+					return toRPCErr(err)
+				}
+				continue
+			}
+			return toRPCErr(err)
+		}
+		err = recvResponse(ctx, cc.dopts, t, &c, stream, reply)
+		if err != nil {
+			if put != nil {
+				put()
+				put = nil
+			}
+			if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
+				if c.failFast {
+					return toRPCErr(err)
+				}
+				continue
+			}
+			return toRPCErr(err)
+		}
+		if c.traceInfo.tr != nil {
+			c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true)
+		}
+		t.CloseStream(stream, nil)
+		if put != nil {
+			put()
+			put = nil
+		}
+		return Errorf(stream.StatusCode(), "%s", stream.StatusDesc())
+	}
+}
diff --git a/vendor/google.golang.org/grpc/call_test.go b/vendor/google.golang.org/grpc/call_test.go
new file mode 100644
index 00000000000..3c2165eac33
--- /dev/null
+++ b/vendor/google.golang.org/grpc/call_test.go
@@ -0,0 +1,298 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"net"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/transport"
+)
+
+var (
+	expectedRequest  = "ping"
+	expectedResponse = "pong"
+	weirdError       = "format verbs: %v%s"
+	sizeLargeErr     = 1024 * 1024
+	canceled         = 0
+)
+
+type testCodec struct {
+}
+
+func (testCodec) Marshal(v interface{}) ([]byte, error) {
+	return []byte(*(v.(*string))), nil
+}
+
+func (testCodec) Unmarshal(data []byte, v interface{}) error {
+	*(v.(*string)) = string(data)
+	return nil
+}
+
+func (testCodec) String() string {
+	return "test"
+}
+
+type testStreamHandler struct {
+	port string
+	t    transport.ServerTransport
+}
+
+func (h *testStreamHandler) handleStream(t *testing.T, s *transport.Stream) {
+	p := &parser{r: s}
+	for {
+		pf, req, err := p.recvMsg(math.MaxInt32)
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return
+		}
+		if pf != compressionNone {
+			t.Errorf("Received the mistaken message format %d, want %d", pf, compressionNone)
+			return
+		}
+		var v string
+		codec := testCodec{}
+		if err := codec.Unmarshal(req, &v); err != nil {
+			t.Errorf("Failed to unmarshal the received message: %v", err)
+			return
+		}
+		if v == "weird error" {
+			h.t.WriteStatus(s, codes.Internal, weirdError)
+			return
+		}
+		if v == "canceled" {
+			canceled++
+			h.t.WriteStatus(s, codes.Internal, "")
+			return
+		}
+		if v == "port" {
+			h.t.WriteStatus(s, codes.Internal, h.port)
+			return
+		}
+
+		if v != expectedRequest {
+			h.t.WriteStatus(s, codes.Internal, strings.Repeat("A", sizeLargeErr))
+			return
+		}
+	}
+	// send a response back to end the stream.
+	reply, err := encode(testCodec{}, &expectedResponse, nil, nil, nil)
+	if err != nil {
+		t.Errorf("Failed to encode the response: %v", err)
+		return
+	}
+	h.t.Write(s, reply, &transport.Options{})
+	h.t.WriteStatus(s, codes.OK, "")
+}
+
+type server struct {
+	lis        net.Listener
+	port       string
+	startedErr chan error // sent nil or an error after server starts
+	mu         sync.Mutex
+	conns      map[transport.ServerTransport]bool
+}
+
+func newTestServer() *server {
+	return &server{startedErr: make(chan error, 1)}
+}
+
+// start starts server. Other goroutines should block on s.startedErr for further operations.
+func (s *server) start(t *testing.T, port int, maxStreams uint32) {
+	var err error
+	if port == 0 {
+		s.lis, err = net.Listen("tcp", "localhost:0")
+	} else {
+		s.lis, err = net.Listen("tcp", "localhost:"+strconv.Itoa(port))
+	}
+	if err != nil {
+		s.startedErr <- fmt.Errorf("failed to listen: %v", err)
+		return
+	}
+	_, p, err := net.SplitHostPort(s.lis.Addr().String())
+	if err != nil {
+		s.startedErr <- fmt.Errorf("failed to parse listener address: %v", err)
+		return
+	}
+	s.port = p
+	s.conns = make(map[transport.ServerTransport]bool)
+	s.startedErr <- nil
+	for {
+		conn, err := s.lis.Accept()
+		if err != nil {
+			return
+		}
+		config := &transport.ServerConfig{
+			MaxStreams: maxStreams,
+		}
+		st, err := transport.NewServerTransport("http2", conn, config)
+		if err != nil {
+			continue
+		}
+		s.mu.Lock()
+		if s.conns == nil {
+			s.mu.Unlock()
+			st.Close()
+			return
+		}
+		s.conns[st] = true
+		s.mu.Unlock()
+		h := &testStreamHandler{
+			port: s.port,
+			t:    st,
+		}
+		go st.HandleStreams(func(s *transport.Stream) {
+			go h.handleStream(t, s)
+		}, func(ctx context.Context, method string) context.Context {
+			return ctx
+		})
+	}
+}
+
+func (s *server) wait(t *testing.T, timeout time.Duration) {
+	select {
+	case err := <-s.startedErr:
+		if err != nil {
+			t.Fatal(err)
+		}
+	case <-time.After(timeout):
+		t.Fatalf("Timed out after %v waiting for server to be ready", timeout)
+	}
+}
+
+func (s *server) stop() {
+	s.lis.Close()
+	s.mu.Lock()
+	for c := range s.conns {
+		c.Close()
+	}
+	s.conns = nil
+	s.mu.Unlock()
+}
+
+func setUp(t *testing.T, port int, maxStreams uint32) (*server, *ClientConn) {
+	server := newTestServer()
+	go server.start(t, port, maxStreams)
+	server.wait(t, 2*time.Second)
+	addr := "localhost:" + server.port
+	cc, err := Dial(addr, WithBlock(), WithInsecure(), WithCodec(testCodec{}))
+	if err != nil {
+		t.Fatalf("Failed to create ClientConn: %v", err)
+	}
+	return server, cc
+}
+
+func TestInvoke(t *testing.T) {
+	server, cc := setUp(t, 0, math.MaxUint32)
+	var reply string
+	if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc); err != nil || reply != expectedResponse {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want <nil>", err)
+	}
+	cc.Close()
+	server.stop()
+}
+
+func TestInvokeLargeErr(t *testing.T) {
+	server, cc := setUp(t, 0, math.MaxUint32)
+	var reply string
+	req := "hello"
+	err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
+	if _, ok := err.(*rpcError); !ok {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) receives non rpc error.")
+	}
+	if Code(err) != codes.Internal || len(ErrorDesc(err)) != sizeLargeErr {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want an error of code %d and desc size %d", err, codes.Internal, sizeLargeErr)
+	}
+	cc.Close()
+	server.stop()
+}
+
+// TestInvokeErrorSpecialChars checks that error messages don't get mangled.
+func TestInvokeErrorSpecialChars(t *testing.T) {
+	server, cc := setUp(t, 0, math.MaxUint32)
+	var reply string
+	req := "weird error"
+	err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
+	if _, ok := err.(*rpcError); !ok {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) receives non rpc error.")
+	}
+	if got, want := ErrorDesc(err), weirdError; got != want {
+		t.Fatalf("grpc.Invoke(_, _, _, _, _) error = %q, want %q", got, want)
+	}
+	cc.Close()
+	server.stop()
+}
+
+// TestInvokeCancel checks that an Invoke with a canceled context is not sent.
+func TestInvokeCancel(t *testing.T) {
+	server, cc := setUp(t, 0, math.MaxUint32)
+	var reply string
+	req := "canceled"
+	for i := 0; i < 100; i++ {
+		ctx, cancel := context.WithCancel(context.Background())
+		cancel()
+		Invoke(ctx, "/foo/bar", &req, &reply, cc)
+	}
+	if canceled != 0 {
+		t.Fatalf("received %d of 100 canceled requests", canceled)
+	}
+	cc.Close()
+	server.stop()
+}
+
+// TestInvokeCancelClosedNonFail checks that a canceled non-failfast RPC
+// on a closed client will terminate.
+func TestInvokeCancelClosedNonFailFast(t *testing.T) {
+	server, cc := setUp(t, 0, math.MaxUint32)
+	var reply string
+	cc.Close()
+	req := "hello"
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if err := Invoke(ctx, "/foo/bar", &req, &reply, cc, FailFast(false)); err == nil {
+		t.Fatalf("canceled invoke on closed connection should fail")
+	}
+	server.stop()
+}
diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go
new file mode 100644
index 00000000000..0879ef09cf9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/clientconn.go
@@ -0,0 +1,999 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"net"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/trace"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/transport"
+)
+
+var (
+	// ErrClientConnClosing indicates that the operation is illegal because
+	// the ClientConn is closing.
+	ErrClientConnClosing = errors.New("grpc: the client connection is closing")
+	// ErrClientConnTimeout indicates that the ClientConn cannot establish the
+	// underlying connections within the specified timeout.
+	// DEPRECATED: Please use context.DeadlineExceeded instead. This error will be
+	// removed in Q1 2017.
+	ErrClientConnTimeout = errors.New("grpc: timed out when dialing")
+
+	// errNoTransportSecurity indicates that there is no transport security
+	// being set for ClientConn. Users should either set one or explicitly
+	// call WithInsecure DialOption to disable security.
+	errNoTransportSecurity = errors.New("grpc: no transport security set (use grpc.WithInsecure() explicitly or set credentials)")
+	// errTransportCredentialsMissing indicates that users want to transmit security
+	// information (e.g., oauth2 token) which requires secure connection on an insecure
+	// connection.
+	errTransportCredentialsMissing = errors.New("grpc: the credentials require transport level security (use grpc.WithTransportCredentials() to set)")
+	// errCredentialsConflict indicates that grpc.WithTransportCredentials()
+	// and grpc.WithInsecure() are both called for a connection.
+	errCredentialsConflict = errors.New("grpc: transport credentials are set for an insecure connection (grpc.WithTransportCredentials() and grpc.WithInsecure() are both called)")
+	// errNetworkIO indicates that the connection is down due to some network I/O error.
+	errNetworkIO = errors.New("grpc: failed with network I/O error")
+	// errConnDrain indicates that the connection starts to be drained and does not accept any new RPCs.
+	errConnDrain = errors.New("grpc: the connection is drained")
+	// errConnClosing indicates that the connection is closing.
+	errConnClosing = errors.New("grpc: the connection is closing")
+	// errConnUnavailable indicates that the connection is unavailable.
+	errConnUnavailable = errors.New("grpc: the connection is unavailable")
+	// minimum time to give a connection to complete
+	minConnectTimeout = 20 * time.Second
+)
+
+// dialOptions configure a Dial call. dialOptions are set by the DialOption
+// values passed to Dial.
+type dialOptions struct {
+	unaryInt   UnaryClientInterceptor
+	streamInt  StreamClientInterceptor
+	codec      Codec
+	cp         Compressor
+	dc         Decompressor
+	bs         backoffStrategy
+	balancer   Balancer
+	block      bool
+	insecure   bool
+	timeout    time.Duration
+	scChan     <-chan ServiceConfig
+	copts      transport.ConnectOptions
+	maxMsgSize int
+}
+
+const defaultClientMaxMsgSize = math.MaxInt32
+
+// DialOption configures how we set up the connection.
+type DialOption func(*dialOptions)
+
+// WithMaxMsgSize returns a DialOption which sets the maximum message size the client can receive.
+func WithMaxMsgSize(s int) DialOption {
+	return func(o *dialOptions) {
+		o.maxMsgSize = s
+	}
+}
+
+// WithCodec returns a DialOption which sets a codec for message marshaling and unmarshaling.
+func WithCodec(c Codec) DialOption {
+	return func(o *dialOptions) {
+		o.codec = c
+	}
+}
+
+// WithCompressor returns a DialOption which sets a CompressorGenerator for generating message
+// compressor.
+func WithCompressor(cp Compressor) DialOption {
+	return func(o *dialOptions) {
+		o.cp = cp
+	}
+}
+
+// WithDecompressor returns a DialOption which sets a DecompressorGenerator for generating
+// message decompressor.
+func WithDecompressor(dc Decompressor) DialOption {
+	return func(o *dialOptions) {
+		o.dc = dc
+	}
+}
+
+// WithBalancer returns a DialOption which sets a load balancer.
+func WithBalancer(b Balancer) DialOption {
+	return func(o *dialOptions) {
+		o.balancer = b
+	}
+}
+
+// WithServiceConfig returns a DialOption which has a channel to read the service configuration.
+func WithServiceConfig(c <-chan ServiceConfig) DialOption {
+	return func(o *dialOptions) {
+		o.scChan = c
+	}
+}
+
+// WithBackoffMaxDelay configures the dialer to use the provided maximum delay
+// when backing off after failed connection attempts.
+func WithBackoffMaxDelay(md time.Duration) DialOption {
+	return WithBackoffConfig(BackoffConfig{MaxDelay: md})
+}
+
+// WithBackoffConfig configures the dialer to use the provided backoff
+// parameters after connection failures.
+//
+// Use WithBackoffMaxDelay until more parameters on BackoffConfig are opened up
+// for use.
+func WithBackoffConfig(b BackoffConfig) DialOption {
+	// Set defaults to ensure that provided BackoffConfig is valid and
+	// unexported fields get default values.
+	setDefaults(&b)
+	return withBackoff(b)
+}
+
+// withBackoff sets the backoff strategy used for retries after a
+// failed connection attempt.
+//
+// This can be exported if arbitrary backoff strategies are allowed by gRPC.
+func withBackoff(bs backoffStrategy) DialOption {
+	return func(o *dialOptions) {
+		o.bs = bs
+	}
+}
+
+// WithBlock returns a DialOption which makes caller of Dial blocks until the underlying
+// connection is up. Without this, Dial returns immediately and connecting the server
+// happens in background.
+func WithBlock() DialOption {
+	return func(o *dialOptions) {
+		o.block = true
+	}
+}
+
+// WithInsecure returns a DialOption which disables transport security for this ClientConn.
+// Note that transport security is required unless WithInsecure is set.
+func WithInsecure() DialOption {
+	return func(o *dialOptions) {
+		o.insecure = true
+	}
+}
+
+// WithTransportCredentials returns a DialOption which configures a
+// connection level security credentials (e.g., TLS/SSL).
+func WithTransportCredentials(creds credentials.TransportCredentials) DialOption {
+	return func(o *dialOptions) {
+		o.copts.TransportCredentials = creds
+	}
+}
+
+// WithPerRPCCredentials returns a DialOption which sets
+// credentials which will place auth state on each outbound RPC.
+func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption {
+	return func(o *dialOptions) {
+		o.copts.PerRPCCredentials = append(o.copts.PerRPCCredentials, creds)
+	}
+}
+
+// WithTimeout returns a DialOption that configures a timeout for dialing a ClientConn
+// initially. This is valid if and only if WithBlock() is present.
+func WithTimeout(d time.Duration) DialOption {
+	return func(o *dialOptions) {
+		o.timeout = d
+	}
+}
+
+// WithDialer returns a DialOption that specifies a function to use for dialing network addresses.
+// If FailOnNonTempDialError() is set to true, and an error is returned by f, gRPC checks the error's
+// Temporary() method to decide if it should try to reconnect to the network address.
+func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption {
+	return func(o *dialOptions) {
+		o.copts.Dialer = func(ctx context.Context, addr string) (net.Conn, error) {
+			if deadline, ok := ctx.Deadline(); ok {
+				return f(addr, deadline.Sub(time.Now()))
+			}
+			return f(addr, 0)
+		}
+	}
+}
+
+// WithStatsHandler returns a DialOption that specifies the stats handler
+// for all the RPCs and underlying network connections in this ClientConn.
+func WithStatsHandler(h stats.Handler) DialOption {
+	return func(o *dialOptions) {
+		o.copts.StatsHandler = h
+	}
+}
+
+// FailOnNonTempDialError returns a DialOption that specified if gRPC fails on non-temporary dial errors.
+// If f is true, and dialer returns a non-temporary error, gRPC will fail the connection to the network
+// address and won't try to reconnect.
+// The default value of FailOnNonTempDialError is false.
+// This is an EXPERIMENTAL API.
+func FailOnNonTempDialError(f bool) DialOption {
+	return func(o *dialOptions) {
+		o.copts.FailOnNonTempDialError = f
+	}
+}
+
+// WithUserAgent returns a DialOption that specifies a user agent string for all the RPCs.
+func WithUserAgent(s string) DialOption {
+	return func(o *dialOptions) {
+		o.copts.UserAgent = s
+	}
+}
+
+// WithKeepaliveParams returns a DialOption that specifies keepalive paramaters for the client transport.
+func WithKeepaliveParams(kp keepalive.ClientParameters) DialOption {
+	return func(o *dialOptions) {
+		o.copts.KeepaliveParams = kp
+	}
+}
+
+// WithUnaryInterceptor returns a DialOption that specifies the interceptor for unary RPCs.
+func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption {
+	return func(o *dialOptions) {
+		o.unaryInt = f
+	}
+}
+
+// WithStreamInterceptor returns a DialOption that specifies the interceptor for streaming RPCs.
+func WithStreamInterceptor(f StreamClientInterceptor) DialOption {
+	return func(o *dialOptions) {
+		o.streamInt = f
+	}
+}
+
+// WithAuthority returns a DialOption that specifies the value to be used as
+// the :authority pseudo-header. This value only works with WithInsecure and
+// has no effect if TransportCredentials are present.
+func WithAuthority(a string) DialOption {
+	return func(o *dialOptions) {
+		o.copts.Authority = a
+	}
+}
+
+// Dial creates a client connection to the given target.
+func Dial(target string, opts ...DialOption) (*ClientConn, error) {
+	return DialContext(context.Background(), target, opts...)
+}
+
+// DialContext creates a client connection to the given target. ctx can be used to
+// cancel or expire the pending connecting. Once this function returns, the
+// cancellation and expiration of ctx will be noop. Users should call ClientConn.Close
+// to terminate all the pending operations after this function returns.
+// This is the EXPERIMENTAL API.
+func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) {
+	cc := &ClientConn{
+		target: target,
+		conns:  make(map[Address]*addrConn),
+	}
+	cc.ctx, cc.cancel = context.WithCancel(context.Background())
+	cc.dopts.maxMsgSize = defaultClientMaxMsgSize
+	for _, opt := range opts {
+		opt(&cc.dopts)
+	}
+
+	grpcUA := "grpc-go/" + Version
+	if cc.dopts.copts.UserAgent != "" {
+		cc.dopts.copts.UserAgent += " " + grpcUA
+	} else {
+		cc.dopts.copts.UserAgent = grpcUA
+	}
+
+	if cc.dopts.timeout > 0 {
+		var cancel context.CancelFunc
+		ctx, cancel = context.WithTimeout(ctx, cc.dopts.timeout)
+		defer cancel()
+	}
+
+	defer func() {
+		select {
+		case <-ctx.Done():
+			conn, err = nil, ctx.Err()
+		default:
+		}
+
+		if err != nil {
+			cc.Close()
+		}
+	}()
+
+	if cc.dopts.scChan != nil {
+		// Wait for the initial service config.
+		select {
+		case sc, ok := <-cc.dopts.scChan:
+			if ok {
+				cc.sc = sc
+			}
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
+	}
+	// Set defaults.
+	if cc.dopts.codec == nil {
+		cc.dopts.codec = protoCodec{}
+	}
+	if cc.dopts.bs == nil {
+		cc.dopts.bs = DefaultBackoffConfig
+	}
+	creds := cc.dopts.copts.TransportCredentials
+	if creds != nil && creds.Info().ServerName != "" {
+		cc.authority = creds.Info().ServerName
+	} else if cc.dopts.insecure && cc.dopts.copts.Authority != "" {
+		cc.authority = cc.dopts.copts.Authority
+	} else {
+		cc.authority = target
+	}
+	waitC := make(chan error, 1)
+	go func() {
+		defer close(waitC)
+		if cc.dopts.balancer == nil && cc.sc.LB != nil {
+			cc.dopts.balancer = cc.sc.LB
+		}
+		if cc.dopts.balancer != nil {
+			var credsClone credentials.TransportCredentials
+			if creds != nil {
+				credsClone = creds.Clone()
+			}
+			config := BalancerConfig{
+				DialCreds: credsClone,
+			}
+			if err := cc.dopts.balancer.Start(target, config); err != nil {
+				waitC <- err
+				return
+			}
+			ch := cc.dopts.balancer.Notify()
+			if ch != nil {
+				if cc.dopts.block {
+					doneChan := make(chan struct{})
+					go cc.lbWatcher(doneChan)
+					<-doneChan
+				} else {
+					go cc.lbWatcher(nil)
+				}
+				return
+			}
+		}
+		// No balancer, or no resolver within the balancer.  Connect directly.
+		if err := cc.resetAddrConn(Address{Addr: target}, cc.dopts.block, nil); err != nil {
+			waitC <- err
+			return
+		}
+	}()
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case err := <-waitC:
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if cc.dopts.scChan != nil {
+		go cc.scWatcher()
+	}
+
+	return cc, nil
+}
+
+// ConnectivityState indicates the state of a client connection.
+type ConnectivityState int
+
+const (
+	// Idle indicates the ClientConn is idle.
+	Idle ConnectivityState = iota
+	// Connecting indicates the ClienConn is connecting.
+	Connecting
+	// Ready indicates the ClientConn is ready for work.
+	Ready
+	// TransientFailure indicates the ClientConn has seen a failure but expects to recover.
+	TransientFailure
+	// Shutdown indicates the ClientConn has started shutting down.
+	Shutdown
+)
+
+func (s ConnectivityState) String() string {
+	switch s {
+	case Idle:
+		return "IDLE"
+	case Connecting:
+		return "CONNECTING"
+	case Ready:
+		return "READY"
+	case TransientFailure:
+		return "TRANSIENT_FAILURE"
+	case Shutdown:
+		return "SHUTDOWN"
+	default:
+		panic(fmt.Sprintf("unknown connectivity state: %d", s))
+	}
+}
+
+// ClientConn represents a client connection to an RPC server.
+type ClientConn struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	target    string
+	authority string
+	dopts     dialOptions
+
+	mu    sync.RWMutex
+	sc    ServiceConfig
+	conns map[Address]*addrConn
+}
+
+// lbWatcher watches the Notify channel of the balancer in cc and manages
+// connections accordingly.  If doneChan is not nil, it is closed after the
+// first successfull connection is made.
+func (cc *ClientConn) lbWatcher(doneChan chan struct{}) {
+	for addrs := range cc.dopts.balancer.Notify() {
+		var (
+			add []Address   // Addresses need to setup connections.
+			del []*addrConn // Connections need to tear down.
+		)
+		cc.mu.Lock()
+		for _, a := range addrs {
+			if _, ok := cc.conns[a]; !ok {
+				add = append(add, a)
+			}
+		}
+		for k, c := range cc.conns {
+			var keep bool
+			for _, a := range addrs {
+				if k == a {
+					keep = true
+					break
+				}
+			}
+			if !keep {
+				del = append(del, c)
+				delete(cc.conns, c.addr)
+			}
+		}
+		cc.mu.Unlock()
+		for _, a := range add {
+			if doneChan != nil {
+				err := cc.resetAddrConn(a, true, nil)
+				if err == nil {
+					close(doneChan)
+					doneChan = nil
+				}
+			} else {
+				cc.resetAddrConn(a, false, nil)
+			}
+		}
+		for _, c := range del {
+			c.tearDown(errConnDrain)
+		}
+	}
+}
+
+func (cc *ClientConn) scWatcher() {
+	for {
+		select {
+		case sc, ok := <-cc.dopts.scChan:
+			if !ok {
+				return
+			}
+			cc.mu.Lock()
+			// TODO: load balance policy runtime change is ignored.
+			// We may revist this decision in the future.
+			cc.sc = sc
+			cc.mu.Unlock()
+		case <-cc.ctx.Done():
+			return
+		}
+	}
+}
+
+// resetAddrConn creates an addrConn for addr and adds it to cc.conns.
+// If there is an old addrConn for addr, it will be torn down, using tearDownErr as the reason.
+// If tearDownErr is nil, errConnDrain will be used instead.
+func (cc *ClientConn) resetAddrConn(addr Address, block bool, tearDownErr error) error {
+	ac := &addrConn{
+		cc:    cc,
+		addr:  addr,
+		dopts: cc.dopts,
+	}
+	ac.ctx, ac.cancel = context.WithCancel(cc.ctx)
+	ac.stateCV = sync.NewCond(&ac.mu)
+	if EnableTracing {
+		ac.events = trace.NewEventLog("grpc.ClientConn", ac.addr.Addr)
+	}
+	if !ac.dopts.insecure {
+		if ac.dopts.copts.TransportCredentials == nil {
+			return errNoTransportSecurity
+		}
+	} else {
+		if ac.dopts.copts.TransportCredentials != nil {
+			return errCredentialsConflict
+		}
+		for _, cd := range ac.dopts.copts.PerRPCCredentials {
+			if cd.RequireTransportSecurity() {
+				return errTransportCredentialsMissing
+			}
+		}
+	}
+	// Track ac in cc. This needs to be done before any getTransport(...) is called.
+	cc.mu.Lock()
+	if cc.conns == nil {
+		cc.mu.Unlock()
+		return ErrClientConnClosing
+	}
+	stale := cc.conns[ac.addr]
+	cc.conns[ac.addr] = ac
+	cc.mu.Unlock()
+	if stale != nil {
+		// There is an addrConn alive on ac.addr already. This could be due to
+		// 1) a buggy Balancer notifies duplicated Addresses;
+		// 2) goaway was received, a new ac will replace the old ac.
+		//    The old ac should be deleted from cc.conns, but the
+		//    underlying transport should drain rather than close.
+		if tearDownErr == nil {
+			// tearDownErr is nil if resetAddrConn is called by
+			// 1) Dial
+			// 2) lbWatcher
+			// In both cases, the stale ac should drain, not close.
+			stale.tearDown(errConnDrain)
+		} else {
+			stale.tearDown(tearDownErr)
+		}
+	}
+	if block {
+		if err := ac.resetTransport(false); err != nil {
+			if err != errConnClosing {
+				// Tear down ac and delete it from cc.conns.
+				cc.mu.Lock()
+				delete(cc.conns, ac.addr)
+				cc.mu.Unlock()
+				ac.tearDown(err)
+			}
+			if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() {
+				return e.Origin()
+			}
+			return err
+		}
+		// Start to monitor the error status of transport.
+		go ac.transportMonitor()
+	} else {
+		// Start a goroutine connecting to the server asynchronously.
+		go func() {
+			if err := ac.resetTransport(false); err != nil {
+				grpclog.Printf("Failed to dial %s: %v; please retry.", ac.addr.Addr, err)
+				if err != errConnClosing {
+					// Keep this ac in cc.conns, to get the reason it's torn down.
+					ac.tearDown(err)
+				}
+				return
+			}
+			ac.transportMonitor()
+		}()
+	}
+	return nil
+}
+
+// TODO: Avoid the locking here.
+func (cc *ClientConn) getMethodConfig(method string) (m MethodConfig, ok bool) {
+	cc.mu.RLock()
+	defer cc.mu.RUnlock()
+	m, ok = cc.sc.Methods[method]
+	return
+}
+
+func (cc *ClientConn) getTransport(ctx context.Context, opts BalancerGetOptions) (transport.ClientTransport, func(), error) {
+	var (
+		ac  *addrConn
+		ok  bool
+		put func()
+	)
+	if cc.dopts.balancer == nil {
+		// If balancer is nil, there should be only one addrConn available.
+		cc.mu.RLock()
+		if cc.conns == nil {
+			cc.mu.RUnlock()
+			return nil, nil, toRPCErr(ErrClientConnClosing)
+		}
+		for _, ac = range cc.conns {
+			// Break after the first iteration to get the first addrConn.
+			ok = true
+			break
+		}
+		cc.mu.RUnlock()
+	} else {
+		var (
+			addr Address
+			err  error
+		)
+		addr, put, err = cc.dopts.balancer.Get(ctx, opts)
+		if err != nil {
+			return nil, nil, toRPCErr(err)
+		}
+		cc.mu.RLock()
+		if cc.conns == nil {
+			cc.mu.RUnlock()
+			return nil, nil, toRPCErr(ErrClientConnClosing)
+		}
+		ac, ok = cc.conns[addr]
+		cc.mu.RUnlock()
+	}
+	if !ok {
+		if put != nil {
+			put()
+		}
+		return nil, nil, errConnClosing
+	}
+	t, err := ac.wait(ctx, cc.dopts.balancer != nil, !opts.BlockingWait)
+	if err != nil {
+		if put != nil {
+			put()
+		}
+		return nil, nil, err
+	}
+	return t, put, nil
+}
+
+// Close tears down the ClientConn and all underlying connections.
+func (cc *ClientConn) Close() error {
+	cc.cancel()
+
+	cc.mu.Lock()
+	if cc.conns == nil {
+		cc.mu.Unlock()
+		return ErrClientConnClosing
+	}
+	conns := cc.conns
+	cc.conns = nil
+	cc.mu.Unlock()
+	if cc.dopts.balancer != nil {
+		cc.dopts.balancer.Close()
+	}
+	for _, ac := range conns {
+		ac.tearDown(ErrClientConnClosing)
+	}
+	return nil
+}
+
+// addrConn is a network connection to a given address.
+type addrConn struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	cc     *ClientConn
+	addr   Address
+	dopts  dialOptions
+	events trace.EventLog
+
+	mu      sync.Mutex
+	state   ConnectivityState
+	stateCV *sync.Cond
+	down    func(error) // the handler called when a connection is down.
+	// ready is closed and becomes nil when a new transport is up or failed
+	// due to timeout.
+	ready     chan struct{}
+	transport transport.ClientTransport
+
+	// The reason this addrConn is torn down.
+	tearDownErr error
+}
+
+// printf records an event in ac's event log, unless ac has been closed.
+// REQUIRES ac.mu is held.
+func (ac *addrConn) printf(format string, a ...interface{}) {
+	if ac.events != nil {
+		ac.events.Printf(format, a...)
+	}
+}
+
+// errorf records an error in ac's event log, unless ac has been closed.
+// REQUIRES ac.mu is held.
+func (ac *addrConn) errorf(format string, a ...interface{}) {
+	if ac.events != nil {
+		ac.events.Errorf(format, a...)
+	}
+}
+
+// getState returns the connectivity state of the Conn
+func (ac *addrConn) getState() ConnectivityState {
+	ac.mu.Lock()
+	defer ac.mu.Unlock()
+	return ac.state
+}
+
+// waitForStateChange blocks until the state changes to something other than the sourceState.
+func (ac *addrConn) waitForStateChange(ctx context.Context, sourceState ConnectivityState) (ConnectivityState, error) {
+	ac.mu.Lock()
+	defer ac.mu.Unlock()
+	if sourceState != ac.state {
+		return ac.state, nil
+	}
+	done := make(chan struct{})
+	var err error
+	go func() {
+		select {
+		case <-ctx.Done():
+			ac.mu.Lock()
+			err = ctx.Err()
+			ac.stateCV.Broadcast()
+			ac.mu.Unlock()
+		case <-done:
+		}
+	}()
+	defer close(done)
+	for sourceState == ac.state {
+		ac.stateCV.Wait()
+		if err != nil {
+			return ac.state, err
+		}
+	}
+	return ac.state, nil
+}
+
+func (ac *addrConn) resetTransport(closeTransport bool) error {
+	for retries := 0; ; retries++ {
+		ac.mu.Lock()
+		ac.printf("connecting")
+		if ac.state == Shutdown {
+			// ac.tearDown(...) has been invoked.
+			ac.mu.Unlock()
+			return errConnClosing
+		}
+		if ac.down != nil {
+			ac.down(downErrorf(false, true, "%v", errNetworkIO))
+			ac.down = nil
+		}
+		ac.state = Connecting
+		ac.stateCV.Broadcast()
+		t := ac.transport
+		ac.mu.Unlock()
+		if closeTransport && t != nil {
+			t.Close()
+		}
+		sleepTime := ac.dopts.bs.backoff(retries)
+		timeout := minConnectTimeout
+		if timeout < sleepTime {
+			timeout = sleepTime
+		}
+		ctx, cancel := context.WithTimeout(ac.ctx, timeout)
+		connectTime := time.Now()
+		sinfo := transport.TargetInfo{
+			Addr:     ac.addr.Addr,
+			Metadata: ac.addr.Metadata,
+		}
+		newTransport, err := transport.NewClientTransport(ctx, sinfo, ac.dopts.copts)
+		// Don't call cancel in success path due to a race in Go 1.6:
+		// https://github.com/golang/go/issues/15078.
+		if err != nil {
+			cancel()
+
+			if e, ok := err.(transport.ConnectionError); ok && !e.Temporary() {
+				return err
+			}
+			grpclog.Printf("grpc: addrConn.resetTransport failed to create client transport: %v; Reconnecting to %v", err, ac.addr)
+			ac.mu.Lock()
+			if ac.state == Shutdown {
+				// ac.tearDown(...) has been invoked.
+				ac.mu.Unlock()
+				return errConnClosing
+			}
+			ac.errorf("transient failure: %v", err)
+			ac.state = TransientFailure
+			ac.stateCV.Broadcast()
+			if ac.ready != nil {
+				close(ac.ready)
+				ac.ready = nil
+			}
+			ac.mu.Unlock()
+			closeTransport = false
+			select {
+			case <-time.After(sleepTime - time.Since(connectTime)):
+			case <-ac.ctx.Done():
+				return ac.ctx.Err()
+			}
+			continue
+		}
+		ac.mu.Lock()
+		ac.printf("ready")
+		if ac.state == Shutdown {
+			// ac.tearDown(...) has been invoked.
+			ac.mu.Unlock()
+			newTransport.Close()
+			return errConnClosing
+		}
+		ac.state = Ready
+		ac.stateCV.Broadcast()
+		ac.transport = newTransport
+		if ac.ready != nil {
+			close(ac.ready)
+			ac.ready = nil
+		}
+		if ac.cc.dopts.balancer != nil {
+			ac.down = ac.cc.dopts.balancer.Up(ac.addr)
+		}
+		ac.mu.Unlock()
+		return nil
+	}
+}
+
+// Run in a goroutine to track the error in transport and create the
+// new transport if an error happens. It returns when the channel is closing.
+func (ac *addrConn) transportMonitor() {
+	for {
+		ac.mu.Lock()
+		t := ac.transport
+		ac.mu.Unlock()
+		select {
+		// This is needed to detect the teardown when
+		// the addrConn is idle (i.e., no RPC in flight).
+		case <-ac.ctx.Done():
+			select {
+			case <-t.Error():
+				t.Close()
+			default:
+			}
+			return
+		case <-t.GoAway():
+			// If GoAway happens without any network I/O error, ac is closed without shutting down the
+			// underlying transport (the transport will be closed when all the pending RPCs finished or
+			// failed.).
+			// If GoAway and some network I/O error happen concurrently, ac and its underlying transport
+			// are closed.
+			// In both cases, a new ac is created.
+			select {
+			case <-t.Error():
+				ac.cc.resetAddrConn(ac.addr, false, errNetworkIO)
+			default:
+				ac.cc.resetAddrConn(ac.addr, false, errConnDrain)
+			}
+			return
+		case <-t.Error():
+			select {
+			case <-ac.ctx.Done():
+				t.Close()
+				return
+			case <-t.GoAway():
+				ac.cc.resetAddrConn(ac.addr, false, errNetworkIO)
+				return
+			default:
+			}
+			ac.mu.Lock()
+			if ac.state == Shutdown {
+				// ac has been shutdown.
+				ac.mu.Unlock()
+				return
+			}
+			ac.state = TransientFailure
+			ac.stateCV.Broadcast()
+			ac.mu.Unlock()
+			if err := ac.resetTransport(true); err != nil {
+				ac.mu.Lock()
+				ac.printf("transport exiting: %v", err)
+				ac.mu.Unlock()
+				grpclog.Printf("grpc: addrConn.transportMonitor exits due to: %v", err)
+				if err != errConnClosing {
+					// Keep this ac in cc.conns, to get the reason it's torn down.
+					ac.tearDown(err)
+				}
+				return
+			}
+		}
+	}
+}
+
+// wait blocks until i) the new transport is up or ii) ctx is done or iii) ac is closed or
+// iv) transport is in TransientFailure and there is a balancer/failfast is true.
+func (ac *addrConn) wait(ctx context.Context, hasBalancer, failfast bool) (transport.ClientTransport, error) {
+	for {
+		ac.mu.Lock()
+		switch {
+		case ac.state == Shutdown:
+			if failfast || !hasBalancer {
+				// RPC is failfast or balancer is nil. This RPC should fail with ac.tearDownErr.
+				err := ac.tearDownErr
+				ac.mu.Unlock()
+				return nil, err
+			}
+			ac.mu.Unlock()
+			return nil, errConnClosing
+		case ac.state == Ready:
+			ct := ac.transport
+			ac.mu.Unlock()
+			return ct, nil
+		case ac.state == TransientFailure:
+			if failfast || hasBalancer {
+				ac.mu.Unlock()
+				return nil, errConnUnavailable
+			}
+		}
+		ready := ac.ready
+		if ready == nil {
+			ready = make(chan struct{})
+			ac.ready = ready
+		}
+		ac.mu.Unlock()
+		select {
+		case <-ctx.Done():
+			return nil, toRPCErr(ctx.Err())
+		// Wait until the new transport is ready or failed.
+		case <-ready:
+		}
+	}
+}
+
+// tearDown starts to tear down the addrConn.
+// TODO(zhaoq): Make this synchronous to avoid unbounded memory consumption in
+// some edge cases (e.g., the caller opens and closes many addrConn's in a
+// tight loop.
+// tearDown doesn't remove ac from ac.cc.conns.
+func (ac *addrConn) tearDown(err error) {
+	ac.cancel()
+
+	ac.mu.Lock()
+	defer ac.mu.Unlock()
+	if ac.down != nil {
+		ac.down(downErrorf(false, false, "%v", err))
+		ac.down = nil
+	}
+	if err == errConnDrain && ac.transport != nil {
+		// GracefulClose(...) may be executed multiple times when
+		// i) receiving multiple GoAway frames from the server; or
+		// ii) there are concurrent name resolver/Balancer triggered
+		// address removal and GoAway.
+		ac.transport.GracefulClose()
+	}
+	if ac.state == Shutdown {
+		return
+	}
+	ac.state = Shutdown
+	ac.tearDownErr = err
+	ac.stateCV.Broadcast()
+	if ac.events != nil {
+		ac.events.Finish()
+		ac.events = nil
+	}
+	if ac.ready != nil {
+		close(ac.ready)
+		ac.ready = nil
+	}
+	if ac.transport != nil && err != errConnDrain {
+		ac.transport.Close()
+	}
+	return
+}
diff --git a/vendor/google.golang.org/grpc/clientconn_test.go b/vendor/google.golang.org/grpc/clientconn_test.go
new file mode 100644
index 00000000000..6652158c1a6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/clientconn_test.go
@@ -0,0 +1,308 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+
+	"google.golang.org/grpc/credentials"
+)
+
+const tlsDir = "testdata/"
+
+func TestDialTimeout(t *testing.T) {
+	conn, err := Dial("Non-Existent.Server:80", WithTimeout(time.Millisecond), WithBlock(), WithInsecure())
+	if err == nil {
+		conn.Close()
+	}
+	if err != context.DeadlineExceeded {
+		t.Fatalf("Dial(_, _) = %v, %v, want %v", conn, err, context.DeadlineExceeded)
+	}
+}
+
+func TestTLSDialTimeout(t *testing.T) {
+	creds, err := credentials.NewClientTLSFromFile(tlsDir+"ca.pem", "x.test.youtube.com")
+	if err != nil {
+		t.Fatalf("Failed to create credentials %v", err)
+	}
+	conn, err := Dial("Non-Existent.Server:80", WithTransportCredentials(creds), WithTimeout(time.Millisecond), WithBlock())
+	if err == nil {
+		conn.Close()
+	}
+	if err != context.DeadlineExceeded {
+		t.Fatalf("Dial(_, _) = %v, %v, want %v", conn, err, context.DeadlineExceeded)
+	}
+}
+
+func TestDefaultAuthority(t *testing.T) {
+	target := "Non-Existent.Server:8080"
+	conn, err := Dial(target, WithInsecure())
+	if err != nil {
+		t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
+	}
+	conn.Close()
+	if conn.authority != target {
+		t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, target)
+	}
+}
+
+func TestTLSServerNameOverwrite(t *testing.T) {
+	overwriteServerName := "over.write.server.name"
+	creds, err := credentials.NewClientTLSFromFile(tlsDir+"ca.pem", overwriteServerName)
+	if err != nil {
+		t.Fatalf("Failed to create credentials %v", err)
+	}
+	conn, err := Dial("Non-Existent.Server:80", WithTransportCredentials(creds))
+	if err != nil {
+		t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
+	}
+	conn.Close()
+	if conn.authority != overwriteServerName {
+		t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
+	}
+}
+
+func TestWithAuthority(t *testing.T) {
+	overwriteServerName := "over.write.server.name"
+	conn, err := Dial("Non-Existent.Server:80", WithInsecure(), WithAuthority(overwriteServerName))
+	if err != nil {
+		t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
+	}
+	conn.Close()
+	if conn.authority != overwriteServerName {
+		t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
+	}
+}
+
+func TestWithAuthorityAndTLS(t *testing.T) {
+	overwriteServerName := "over.write.server.name"
+	creds, err := credentials.NewClientTLSFromFile(tlsDir+"ca.pem", overwriteServerName)
+	if err != nil {
+		t.Fatalf("Failed to create credentials %v", err)
+	}
+	conn, err := Dial("Non-Existent.Server:80", WithTransportCredentials(creds), WithAuthority("no.effect.authority"))
+	if err != nil {
+		t.Fatalf("Dial(_, _) = _, %v, want _, <nil>", err)
+	}
+	conn.Close()
+	if conn.authority != overwriteServerName {
+		t.Fatalf("%v.authority = %v, want %v", conn, conn.authority, overwriteServerName)
+	}
+}
+
+func TestDialContextCancel(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if _, err := DialContext(ctx, "Non-Existent.Server:80", WithBlock(), WithInsecure()); err != context.Canceled {
+		t.Fatalf("DialContext(%v, _) = _, %v, want _, %v", ctx, err, context.Canceled)
+	}
+}
+
+// blockingBalancer mimics the behavior of balancers whose initialization takes a long time.
+// In this test, reading from blockingBalancer.Notify() blocks forever.
+type blockingBalancer struct {
+	ch chan []Address
+}
+
+func newBlockingBalancer() Balancer {
+	return &blockingBalancer{ch: make(chan []Address)}
+}
+func (b *blockingBalancer) Start(target string, config BalancerConfig) error {
+	return nil
+}
+func (b *blockingBalancer) Up(addr Address) func(error) {
+	return nil
+}
+func (b *blockingBalancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
+	return Address{}, nil, nil
+}
+func (b *blockingBalancer) Notify() <-chan []Address {
+	return b.ch
+}
+func (b *blockingBalancer) Close() error {
+	close(b.ch)
+	return nil
+}
+
+func TestDialWithBlockingBalancer(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	dialDone := make(chan struct{})
+	go func() {
+		DialContext(ctx, "Non-Existent.Server:80", WithBlock(), WithInsecure(), WithBalancer(newBlockingBalancer()))
+		close(dialDone)
+	}()
+	cancel()
+	<-dialDone
+}
+
+// securePerRPCCredentials always requires transport security.
+type securePerRPCCredentials struct{}
+
+func (c securePerRPCCredentials) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
+	return nil, nil
+}
+
+func (c securePerRPCCredentials) RequireTransportSecurity() bool {
+	return true
+}
+
+func TestCredentialsMisuse(t *testing.T) {
+	tlsCreds, err := credentials.NewClientTLSFromFile(tlsDir+"ca.pem", "x.test.youtube.com")
+	if err != nil {
+		t.Fatalf("Failed to create authenticator %v", err)
+	}
+	// Two conflicting credential configurations
+	if _, err := Dial("Non-Existent.Server:80", WithTransportCredentials(tlsCreds), WithBlock(), WithInsecure()); err != errCredentialsConflict {
+		t.Fatalf("Dial(_, _) = _, %v, want _, %v", err, errCredentialsConflict)
+	}
+	// security info on insecure connection
+	if _, err := Dial("Non-Existent.Server:80", WithPerRPCCredentials(securePerRPCCredentials{}), WithBlock(), WithInsecure()); err != errTransportCredentialsMissing {
+		t.Fatalf("Dial(_, _) = _, %v, want _, %v", err, errTransportCredentialsMissing)
+	}
+}
+
+func TestWithBackoffConfigDefault(t *testing.T) {
+	testBackoffConfigSet(t, &DefaultBackoffConfig)
+}
+
+func TestWithBackoffConfig(t *testing.T) {
+	b := BackoffConfig{MaxDelay: DefaultBackoffConfig.MaxDelay / 2}
+	expected := b
+	setDefaults(&expected) // defaults should be set
+	testBackoffConfigSet(t, &expected, WithBackoffConfig(b))
+}
+
+func TestWithBackoffMaxDelay(t *testing.T) {
+	md := DefaultBackoffConfig.MaxDelay / 2
+	expected := BackoffConfig{MaxDelay: md}
+	setDefaults(&expected)
+	testBackoffConfigSet(t, &expected, WithBackoffMaxDelay(md))
+}
+
+func testBackoffConfigSet(t *testing.T, expected *BackoffConfig, opts ...DialOption) {
+	opts = append(opts, WithInsecure())
+	conn, err := Dial("foo:80", opts...)
+	if err != nil {
+		t.Fatalf("unexpected error dialing connection: %v", err)
+	}
+
+	if conn.dopts.bs == nil {
+		t.Fatalf("backoff config not set")
+	}
+
+	actual, ok := conn.dopts.bs.(BackoffConfig)
+	if !ok {
+		t.Fatalf("unexpected type of backoff config: %#v", conn.dopts.bs)
+	}
+
+	if actual != *expected {
+		t.Fatalf("unexpected backoff config on connection: %v, want %v", actual, expected)
+	}
+	conn.Close()
+}
+
+type testErr struct {
+	temp bool
+}
+
+func (e *testErr) Error() string {
+	return "test error"
+}
+
+func (e *testErr) Temporary() bool {
+	return e.temp
+}
+
+var nonTemporaryError = &testErr{false}
+
+func nonTemporaryErrorDialer(addr string, timeout time.Duration) (net.Conn, error) {
+	return nil, nonTemporaryError
+}
+
+func TestDialWithBlockErrorOnNonTemporaryErrorDialer(t *testing.T) {
+	ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	if _, err := DialContext(ctx, "", WithInsecure(), WithDialer(nonTemporaryErrorDialer), WithBlock(), FailOnNonTempDialError(true)); err != nonTemporaryError {
+		t.Fatalf("Dial(%q) = %v, want %v", "", err, nonTemporaryError)
+	}
+
+	// Without FailOnNonTempDialError, gRPC will retry to connect, and dial should exit with time out error.
+	if _, err := DialContext(ctx, "", WithInsecure(), WithDialer(nonTemporaryErrorDialer), WithBlock()); err != context.DeadlineExceeded {
+		t.Fatalf("Dial(%q) = %v, want %v", "", err, context.DeadlineExceeded)
+	}
+}
+
+// emptyBalancer returns an empty set of servers.
+type emptyBalancer struct {
+	ch chan []Address
+}
+
+func newEmptyBalancer() Balancer {
+	return &emptyBalancer{ch: make(chan []Address, 1)}
+}
+func (b *emptyBalancer) Start(_ string, _ BalancerConfig) error {
+	b.ch <- nil
+	return nil
+}
+func (b *emptyBalancer) Up(_ Address) func(error) {
+	return nil
+}
+func (b *emptyBalancer) Get(_ context.Context, _ BalancerGetOptions) (Address, func(), error) {
+	return Address{}, nil, nil
+}
+func (b *emptyBalancer) Notify() <-chan []Address {
+	return b.ch
+}
+func (b *emptyBalancer) Close() error {
+	close(b.ch)
+	return nil
+}
+
+func TestNonblockingDialWithEmptyBalancer(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	dialDone := make(chan struct{})
+	go func() {
+		conn, err := DialContext(ctx, "Non-Existent.Server:80", WithInsecure(), WithBalancer(newEmptyBalancer()))
+		if err != nil {
+			t.Fatalf("unexpected error dialing connection: %v", err)
+		}
+		conn.Close()
+		close(dialDone)
+	}()
+	<-dialDone
+	cancel()
+}
diff --git a/vendor/google.golang.org/grpc/codegen.sh b/vendor/google.golang.org/grpc/codegen.sh
new file mode 100755
index 00000000000..4cdc6ba7c09
--- /dev/null
+++ b/vendor/google.golang.org/grpc/codegen.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# This script serves as an example to demonstrate how to generate the gRPC-Go
+# interface and the related messages from .proto file.
+#
+# It assumes the installation of i) Google proto buffer compiler at
+# https://github.com/google/protobuf (after v2.6.1) and ii) the Go codegen
+# plugin at https://github.com/golang/protobuf (after 2015-02-20). If you have
+# not, please install them first.
+#
+# We recommend running this script at $GOPATH/src.
+#
+# If this is not what you need, feel free to make your own scripts. Again, this
+# script is for demonstration purpose.
+#
+proto=$1
+protoc --go_out=plugins=grpc:. $proto
diff --git a/vendor/google.golang.org/grpc/codes/code_string.go b/vendor/google.golang.org/grpc/codes/code_string.go
new file mode 100644
index 00000000000..e6762d08455
--- /dev/null
+++ b/vendor/google.golang.org/grpc/codes/code_string.go
@@ -0,0 +1,16 @@
+// generated by stringer -type=Code; DO NOT EDIT
+
+package codes
+
+import "fmt"
+
+const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated"
+
+var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192}
+
+func (i Code) String() string {
+	if i+1 >= Code(len(_Code_index)) {
+		return fmt.Sprintf("Code(%d)", i)
+	}
+	return _Code_name[_Code_index[i]:_Code_index[i+1]]
+}
diff --git a/vendor/google.golang.org/grpc/codes/codes.go b/vendor/google.golang.org/grpc/codes/codes.go
new file mode 100644
index 00000000000..e14b464acfd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/codes/codes.go
@@ -0,0 +1,159 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package codes defines the canonical error codes used by gRPC. It is
+// consistent across various languages.
+package codes // import "google.golang.org/grpc/codes"
+
+// A Code is an unsigned 32-bit error code as defined in the gRPC spec.
+type Code uint32
+
+//go:generate stringer -type=Code
+
+const (
+	// OK is returned on success.
+	OK Code = 0
+
+	// Canceled indicates the operation was cancelled (typically by the caller).
+	Canceled Code = 1
+
+	// Unknown error.  An example of where this error may be returned is
+	// if a Status value received from another address space belongs to
+	// an error-space that is not known in this address space.  Also
+	// errors raised by APIs that do not return enough error information
+	// may be converted to this error.
+	Unknown Code = 2
+
+	// InvalidArgument indicates client specified an invalid argument.
+	// Note that this differs from FailedPrecondition. It indicates arguments
+	// that are problematic regardless of the state of the system
+	// (e.g., a malformed file name).
+	InvalidArgument Code = 3
+
+	// DeadlineExceeded means operation expired before completion.
+	// For operations that change the state of the system, this error may be
+	// returned even if the operation has completed successfully. For
+	// example, a successful response from a server could have been delayed
+	// long enough for the deadline to expire.
+	DeadlineExceeded Code = 4
+
+	// NotFound means some requested entity (e.g., file or directory) was
+	// not found.
+	NotFound Code = 5
+
+	// AlreadyExists means an attempt to create an entity failed because one
+	// already exists.
+	AlreadyExists Code = 6
+
+	// PermissionDenied indicates the caller does not have permission to
+	// execute the specified operation. It must not be used for rejections
+	// caused by exhausting some resource (use ResourceExhausted
+	// instead for those errors).  It must not be
+	// used if the caller cannot be identified (use Unauthenticated
+	// instead for those errors).
+	PermissionDenied Code = 7
+
+	// Unauthenticated indicates the request does not have valid
+	// authentication credentials for the operation.
+	Unauthenticated Code = 16
+
+	// ResourceExhausted indicates some resource has been exhausted, perhaps
+	// a per-user quota, or perhaps the entire file system is out of space.
+	ResourceExhausted Code = 8
+
+	// FailedPrecondition indicates operation was rejected because the
+	// system is not in a state required for the operation's execution.
+	// For example, directory to be deleted may be non-empty, an rmdir
+	// operation is applied to a non-directory, etc.
+	//
+	// A litmus test that may help a service implementor in deciding
+	// between FailedPrecondition, Aborted, and Unavailable:
+	//  (a) Use Unavailable if the client can retry just the failing call.
+	//  (b) Use Aborted if the client should retry at a higher-level
+	//      (e.g., restarting a read-modify-write sequence).
+	//  (c) Use FailedPrecondition if the client should not retry until
+	//      the system state has been explicitly fixed.  E.g., if an "rmdir"
+	//      fails because the directory is non-empty, FailedPrecondition
+	//      should be returned since the client should not retry unless
+	//      they have first fixed up the directory by deleting files from it.
+	//  (d) Use FailedPrecondition if the client performs conditional
+	//      REST Get/Update/Delete on a resource and the resource on the
+	//      server does not match the condition. E.g., conflicting
+	//      read-modify-write on the same resource.
+	FailedPrecondition Code = 9
+
+	// Aborted indicates the operation was aborted, typically due to a
+	// concurrency issue like sequencer check failures, transaction aborts,
+	// etc.
+	//
+	// See litmus test above for deciding between FailedPrecondition,
+	// Aborted, and Unavailable.
+	Aborted Code = 10
+
+	// OutOfRange means operation was attempted past the valid range.
+	// E.g., seeking or reading past end of file.
+	//
+	// Unlike InvalidArgument, this error indicates a problem that may
+	// be fixed if the system state changes. For example, a 32-bit file
+	// system will generate InvalidArgument if asked to read at an
+	// offset that is not in the range [0,2^32-1], but it will generate
+	// OutOfRange if asked to read from an offset past the current
+	// file size.
+	//
+	// There is a fair bit of overlap between FailedPrecondition and
+	// OutOfRange.  We recommend using OutOfRange (the more specific
+	// error) when it applies so that callers who are iterating through
+	// a space can easily look for an OutOfRange error to detect when
+	// they are done.
+	OutOfRange Code = 11
+
+	// Unimplemented indicates operation is not implemented or not
+	// supported/enabled in this service.
+	Unimplemented Code = 12
+
+	// Internal errors.  Means some invariants expected by underlying
+	// system has been broken.  If you see one of these errors,
+	// something is very broken.
+	Internal Code = 13
+
+	// Unavailable indicates the service is currently unavailable.
+	// This is a most likely a transient condition and may be corrected
+	// by retrying with a backoff.
+	//
+	// See litmus test above for deciding between FailedPrecondition,
+	// Aborted, and Unavailable.
+	Unavailable Code = 14
+
+	// DataLoss indicates unrecoverable data loss or corruption.
+	DataLoss Code = 15
+)
diff --git a/vendor/google.golang.org/grpc/coverage.sh b/vendor/google.golang.org/grpc/coverage.sh
new file mode 100755
index 00000000000..b85f9181dee
--- /dev/null
+++ b/vendor/google.golang.org/grpc/coverage.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+
+set -e
+
+workdir=.cover
+profile="$workdir/cover.out"
+mode=set
+end2endtest="google.golang.org/grpc/test"
+
+generate_cover_data() {
+    rm -rf "$workdir"
+    mkdir "$workdir"
+
+    for pkg in "$@"; do
+        if [ $pkg == "google.golang.org/grpc" -o $pkg == "google.golang.org/grpc/transport" -o $pkg == "google.golang.org/grpc/metadata" -o $pkg == "google.golang.org/grpc/credentials" ]
+            then
+                f="$workdir/$(echo $pkg | tr / -)"
+                go test -covermode="$mode" -coverprofile="$f.cover" "$pkg"
+                go test -covermode="$mode" -coverpkg "$pkg" -coverprofile="$f.e2e.cover" "$end2endtest"
+        fi
+    done
+
+    echo "mode: $mode" >"$profile"
+    grep -h -v "^mode:" "$workdir"/*.cover >>"$profile"
+}
+
+show_cover_report() {
+    go tool cover -${1}="$profile"
+}
+
+push_to_coveralls() {
+    goveralls -coverprofile="$profile"
+}
+
+generate_cover_data $(go list ./...)
+show_cover_report func
+case "$1" in
+"")
+    ;;
+--html)
+    show_cover_report html ;;
+--coveralls)
+    push_to_coveralls ;;
+*)
+    echo >&2 "error: invalid option: $1" ;;
+esac
+rm -rf "$workdir"
diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go
new file mode 100644
index 00000000000..a8114d67130
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/credentials.go
@@ -0,0 +1,234 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package credentials implements various credentials supported by gRPC library,
+// which encapsulate all the state needed by a client to authenticate with a
+// server and make various assertions, e.g., about the client's identity, role,
+// or whether it is authorized to make a particular call.
+package credentials // import "google.golang.org/grpc/credentials"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"strings"
+
+	"golang.org/x/net/context"
+)
+
+var (
+	// alpnProtoStr are the specified application level protocols for gRPC.
+	alpnProtoStr = []string{"h2"}
+)
+
+// PerRPCCredentials defines the common interface for the credentials which need to
+// attach security information to every RPC (e.g., oauth2).
+type PerRPCCredentials interface {
+	// GetRequestMetadata gets the current request metadata, refreshing
+	// tokens if required. This should be called by the transport layer on
+	// each request, and the data should be populated in headers or other
+	// context. uri is the URI of the entry point for the request. When
+	// supported by the underlying implementation, ctx can be used for
+	// timeout and cancellation.
+	// TODO(zhaoq): Define the set of the qualified keys instead of leaving
+	// it as an arbitrary string.
+	GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error)
+	// RequireTransportSecurity indicates whether the credentials requires
+	// transport security.
+	RequireTransportSecurity() bool
+}
+
+// ProtocolInfo provides information regarding the gRPC wire protocol version,
+// security protocol, security protocol version in use, server name, etc.
+type ProtocolInfo struct {
+	// ProtocolVersion is the gRPC wire protocol version.
+	ProtocolVersion string
+	// SecurityProtocol is the security protocol in use.
+	SecurityProtocol string
+	// SecurityVersion is the security protocol version.
+	SecurityVersion string
+	// ServerName is the user-configured server name.
+	ServerName string
+}
+
+// AuthInfo defines the common interface for the auth information the users are interested in.
+type AuthInfo interface {
+	AuthType() string
+}
+
+var (
+	// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
+	// and the caller should not close rawConn.
+	ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
+)
+
+// TransportCredentials defines the common interface for all the live gRPC wire
+// protocols and supported transport security protocols (e.g., TLS, SSL).
+type TransportCredentials interface {
+	// ClientHandshake does the authentication handshake specified by the corresponding
+	// authentication protocol on rawConn for clients. It returns the authenticated
+	// connection and the corresponding auth information about the connection.
+	// Implementations must use the provided context to implement timely cancellation.
+	// gRPC will try to reconnect if the error returned is a temporary error
+	// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).
+	// If the returned error is a wrapper error, implementations should make sure that
+	// the error implements Temporary() to have the correct retry behaviors.
+	ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error)
+	// ServerHandshake does the authentication handshake for servers. It returns
+	// the authenticated connection and the corresponding auth information about
+	// the connection.
+	ServerHandshake(net.Conn) (net.Conn, AuthInfo, error)
+	// Info provides the ProtocolInfo of this TransportCredentials.
+	Info() ProtocolInfo
+	// Clone makes a copy of this TransportCredentials.
+	Clone() TransportCredentials
+	// OverrideServerName overrides the server name used to verify the hostname on the returned certificates from the server.
+	// gRPC internals also use it to override the virtual hosting name if it is set.
+	// It must be called before dialing. Currently, this is only used by grpclb.
+	OverrideServerName(string) error
+}
+
+// TLSInfo contains the auth information for a TLS authenticated connection.
+// It implements the AuthInfo interface.
+type TLSInfo struct {
+	State tls.ConnectionState
+}
+
+// AuthType returns the type of TLSInfo as a string.
+func (t TLSInfo) AuthType() string {
+	return "tls"
+}
+
+// tlsCreds is the credentials required for authenticating a connection using TLS.
+type tlsCreds struct {
+	// TLS configuration
+	config *tls.Config
+}
+
+func (c tlsCreds) Info() ProtocolInfo {
+	return ProtocolInfo{
+		SecurityProtocol: "tls",
+		SecurityVersion:  "1.2",
+		ServerName:       c.config.ServerName,
+	}
+}
+
+func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
+	// use local cfg to avoid clobbering ServerName if using multiple endpoints
+	cfg := cloneTLSConfig(c.config)
+	if cfg.ServerName == "" {
+		colonPos := strings.LastIndex(addr, ":")
+		if colonPos == -1 {
+			colonPos = len(addr)
+		}
+		cfg.ServerName = addr[:colonPos]
+	}
+	conn := tls.Client(rawConn, cfg)
+	errChannel := make(chan error, 1)
+	go func() {
+		errChannel <- conn.Handshake()
+	}()
+	select {
+	case err := <-errChannel:
+		if err != nil {
+			return nil, nil, err
+		}
+	case <-ctx.Done():
+		return nil, nil, ctx.Err()
+	}
+	return conn, TLSInfo{conn.ConnectionState()}, nil
+}
+
+func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) {
+	conn := tls.Server(rawConn, c.config)
+	if err := conn.Handshake(); err != nil {
+		return nil, nil, err
+	}
+	return conn, TLSInfo{conn.ConnectionState()}, nil
+}
+
+func (c *tlsCreds) Clone() TransportCredentials {
+	return NewTLS(c.config)
+}
+
+func (c *tlsCreds) OverrideServerName(serverNameOverride string) error {
+	c.config.ServerName = serverNameOverride
+	return nil
+}
+
+// NewTLS uses c to construct a TransportCredentials based on TLS.
+func NewTLS(c *tls.Config) TransportCredentials {
+	tc := &tlsCreds{cloneTLSConfig(c)}
+	tc.config.NextProtos = alpnProtoStr
+	return tc
+}
+
+// NewClientTLSFromCert constructs a TLS from the input certificate for client.
+// serverNameOverride is for testing only. If set to a non empty string,
+// it will override the virtual host name of authority (e.g. :authority header field) in requests.
+func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials {
+	return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp})
+}
+
+// NewClientTLSFromFile constructs a TLS from the input certificate file for client.
+// serverNameOverride is for testing only. If set to a non empty string,
+// it will override the virtual host name of authority (e.g. :authority header field) in requests.
+func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error) {
+	b, err := ioutil.ReadFile(certFile)
+	if err != nil {
+		return nil, err
+	}
+	cp := x509.NewCertPool()
+	if !cp.AppendCertsFromPEM(b) {
+		return nil, fmt.Errorf("credentials: failed to append certificates")
+	}
+	return NewTLS(&tls.Config{ServerName: serverNameOverride, RootCAs: cp}), nil
+}
+
+// NewServerTLSFromCert constructs a TLS from the input certificate for server.
+func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials {
+	return NewTLS(&tls.Config{Certificates: []tls.Certificate{*cert}})
+}
+
+// NewServerTLSFromFile constructs a TLS from the input certificate file and key
+// file for server.
+func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error) {
+	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+	if err != nil {
+		return nil, err
+	}
+	return NewTLS(&tls.Config{Certificates: []tls.Certificate{cert}}), nil
+}
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_test.go b/vendor/google.golang.org/grpc/credentials/credentials_test.go
new file mode 100644
index 00000000000..1609374cc31
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/credentials_test.go
@@ -0,0 +1,222 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package credentials
+
+import (
+	"crypto/tls"
+	"net"
+	"testing"
+
+	"golang.org/x/net/context"
+)
+
+func TestTLSOverrideServerName(t *testing.T) {
+	expectedServerName := "server.name"
+	c := NewTLS(nil)
+	c.OverrideServerName(expectedServerName)
+	if c.Info().ServerName != expectedServerName {
+		t.Fatalf("c.Info().ServerName = %v, want %v", c.Info().ServerName, expectedServerName)
+	}
+}
+
+func TestTLSClone(t *testing.T) {
+	expectedServerName := "server.name"
+	c := NewTLS(nil)
+	c.OverrideServerName(expectedServerName)
+	cc := c.Clone()
+	if cc.Info().ServerName != expectedServerName {
+		t.Fatalf("cc.Info().ServerName = %v, want %v", cc.Info().ServerName, expectedServerName)
+	}
+	cc.OverrideServerName("")
+	if c.Info().ServerName != expectedServerName {
+		t.Fatalf("Change in clone should not affect the original, c.Info().ServerName = %v, want %v", c.Info().ServerName, expectedServerName)
+	}
+
+}
+
+const tlsDir = "../test/testdata/"
+
+type serverHandshake func(net.Conn) (AuthInfo, error)
+
+func TestClientHandshakeReturnsAuthInfo(t *testing.T) {
+	done := make(chan AuthInfo, 1)
+	lis := launchServer(t, tlsServerHandshake, done)
+	defer lis.Close()
+	lisAddr := lis.Addr().String()
+	clientAuthInfo := clientHandle(t, gRPCClientHandshake, lisAddr)
+	// wait until server sends serverAuthInfo or fails.
+	serverAuthInfo, ok := <-done
+	if !ok {
+		t.Fatalf("Error at server-side")
+	}
+	if !compare(clientAuthInfo, serverAuthInfo) {
+		t.Fatalf("c.ClientHandshake(_, %v, _) = %v, want %v.", lisAddr, clientAuthInfo, serverAuthInfo)
+	}
+}
+
+func TestServerHandshakeReturnsAuthInfo(t *testing.T) {
+	done := make(chan AuthInfo, 1)
+	lis := launchServer(t, gRPCServerHandshake, done)
+	defer lis.Close()
+	clientAuthInfo := clientHandle(t, tlsClientHandshake, lis.Addr().String())
+	// wait until server sends serverAuthInfo or fails.
+	serverAuthInfo, ok := <-done
+	if !ok {
+		t.Fatalf("Error at server-side")
+	}
+	if !compare(clientAuthInfo, serverAuthInfo) {
+		t.Fatalf("ServerHandshake(_) = %v, want %v.", serverAuthInfo, clientAuthInfo)
+	}
+}
+
+func TestServerAndClientHandshake(t *testing.T) {
+	done := make(chan AuthInfo, 1)
+	lis := launchServer(t, gRPCServerHandshake, done)
+	defer lis.Close()
+	clientAuthInfo := clientHandle(t, gRPCClientHandshake, lis.Addr().String())
+	// wait until server sends serverAuthInfo or fails.
+	serverAuthInfo, ok := <-done
+	if !ok {
+		t.Fatalf("Error at server-side")
+	}
+	if !compare(clientAuthInfo, serverAuthInfo) {
+		t.Fatalf("AuthInfo returned by server: %v and client: %v aren't same", serverAuthInfo, clientAuthInfo)
+	}
+}
+
+func compare(a1, a2 AuthInfo) bool {
+	if a1.AuthType() != a2.AuthType() {
+		return false
+	}
+	switch a1.AuthType() {
+	case "tls":
+		state1 := a1.(TLSInfo).State
+		state2 := a2.(TLSInfo).State
+		if state1.Version == state2.Version &&
+			state1.HandshakeComplete == state2.HandshakeComplete &&
+			state1.CipherSuite == state2.CipherSuite &&
+			state1.NegotiatedProtocol == state2.NegotiatedProtocol {
+			return true
+		}
+		return false
+	default:
+		return false
+	}
+}
+
+func launchServer(t *testing.T, hs serverHandshake, done chan AuthInfo) net.Listener {
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen: %v", err)
+	}
+	go serverHandle(t, hs, done, lis)
+	return lis
+}
+
+// Is run in a seperate goroutine.
+func serverHandle(t *testing.T, hs serverHandshake, done chan AuthInfo, lis net.Listener) {
+	serverRawConn, err := lis.Accept()
+	if err != nil {
+		t.Errorf("Server failed to accept connection: %v", err)
+		close(done)
+		return
+	}
+	serverAuthInfo, err := hs(serverRawConn)
+	if err != nil {
+		t.Errorf("Server failed while handshake. Error: %v", err)
+		serverRawConn.Close()
+		close(done)
+		return
+	}
+	done <- serverAuthInfo
+}
+
+func clientHandle(t *testing.T, hs func(net.Conn, string) (AuthInfo, error), lisAddr string) AuthInfo {
+	conn, err := net.Dial("tcp", lisAddr)
+	if err != nil {
+		t.Fatalf("Client failed to connect to %s. Error: %v", lisAddr, err)
+	}
+	defer conn.Close()
+	clientAuthInfo, err := hs(conn, lisAddr)
+	if err != nil {
+		t.Fatalf("Error on client while handshake. Error: %v", err)
+	}
+	return clientAuthInfo
+}
+
+// Server handshake implementation in gRPC.
+func gRPCServerHandshake(conn net.Conn) (AuthInfo, error) {
+	serverTLS, err := NewServerTLSFromFile(tlsDir+"server1.pem", tlsDir+"server1.key")
+	if err != nil {
+		return nil, err
+	}
+	_, serverAuthInfo, err := serverTLS.ServerHandshake(conn)
+	if err != nil {
+		return nil, err
+	}
+	return serverAuthInfo, nil
+}
+
+// Client handshake implementation in gRPC.
+func gRPCClientHandshake(conn net.Conn, lisAddr string) (AuthInfo, error) {
+	clientTLS := NewTLS(&tls.Config{InsecureSkipVerify: true})
+	_, authInfo, err := clientTLS.ClientHandshake(context.Background(), lisAddr, conn)
+	if err != nil {
+		return nil, err
+	}
+	return authInfo, nil
+}
+
+func tlsServerHandshake(conn net.Conn) (AuthInfo, error) {
+	cert, err := tls.LoadX509KeyPair(tlsDir+"server1.pem", tlsDir+"server1.key")
+	if err != nil {
+		return nil, err
+	}
+	serverTLSConfig := &tls.Config{Certificates: []tls.Certificate{cert}}
+	serverConn := tls.Server(conn, serverTLSConfig)
+	err = serverConn.Handshake()
+	if err != nil {
+		return nil, err
+	}
+	return TLSInfo{State: serverConn.ConnectionState()}, nil
+}
+
+func tlsClientHandshake(conn net.Conn, _ string) (AuthInfo, error) {
+	clientTLSConfig := &tls.Config{InsecureSkipVerify: true}
+	clientConn := tls.Client(conn, clientTLSConfig)
+	if err := clientConn.Handshake(); err != nil {
+		return nil, err
+	}
+	return TLSInfo{State: clientConn.ConnectionState()}, nil
+}
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go
new file mode 100644
index 00000000000..7597b09e358
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/credentials_util_go17.go
@@ -0,0 +1,75 @@
+// +build go1.7
+// +build !go1.8
+
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package credentials
+
+import (
+	"crypto/tls"
+)
+
+// cloneTLSConfig returns a shallow clone of the exported
+// fields of cfg, ignoring the unexported sync.Once, which
+// contains a mutex and must not be copied.
+//
+// If cfg is nil, a new zero tls.Config is returned.
+func cloneTLSConfig(cfg *tls.Config) *tls.Config {
+	if cfg == nil {
+		return &tls.Config{}
+	}
+	return &tls.Config{
+		Rand:                        cfg.Rand,
+		Time:                        cfg.Time,
+		Certificates:                cfg.Certificates,
+		NameToCertificate:           cfg.NameToCertificate,
+		GetCertificate:              cfg.GetCertificate,
+		RootCAs:                     cfg.RootCAs,
+		NextProtos:                  cfg.NextProtos,
+		ServerName:                  cfg.ServerName,
+		ClientAuth:                  cfg.ClientAuth,
+		ClientCAs:                   cfg.ClientCAs,
+		InsecureSkipVerify:          cfg.InsecureSkipVerify,
+		CipherSuites:                cfg.CipherSuites,
+		PreferServerCipherSuites:    cfg.PreferServerCipherSuites,
+		SessionTicketsDisabled:      cfg.SessionTicketsDisabled,
+		SessionTicketKey:            cfg.SessionTicketKey,
+		ClientSessionCache:          cfg.ClientSessionCache,
+		MinVersion:                  cfg.MinVersion,
+		MaxVersion:                  cfg.MaxVersion,
+		CurvePreferences:            cfg.CurvePreferences,
+		DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled,
+		Renegotiation:               cfg.Renegotiation,
+	}
+}
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_go18.go b/vendor/google.golang.org/grpc/credentials/credentials_util_go18.go
new file mode 100644
index 00000000000..0ecf342da84
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/credentials_util_go18.go
@@ -0,0 +1,53 @@
+// +build go1.8
+
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package credentials
+
+import (
+	"crypto/tls"
+)
+
+// cloneTLSConfig returns a shallow clone of the exported
+// fields of cfg, ignoring the unexported sync.Once, which
+// contains a mutex and must not be copied.
+//
+// If cfg is nil, a new zero tls.Config is returned.
+func cloneTLSConfig(cfg *tls.Config) *tls.Config {
+	if cfg == nil {
+		return &tls.Config{}
+	}
+
+	return cfg.Clone()
+}
diff --git a/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go b/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go
new file mode 100644
index 00000000000..cfd40dfa34a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go
@@ -0,0 +1,72 @@
+// +build !go1.7
+
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package credentials
+
+import (
+	"crypto/tls"
+)
+
+// cloneTLSConfig returns a shallow clone of the exported
+// fields of cfg, ignoring the unexported sync.Once, which
+// contains a mutex and must not be copied.
+//
+// If cfg is nil, a new zero tls.Config is returned.
+func cloneTLSConfig(cfg *tls.Config) *tls.Config {
+	if cfg == nil {
+		return &tls.Config{}
+	}
+	return &tls.Config{
+		Rand:                     cfg.Rand,
+		Time:                     cfg.Time,
+		Certificates:             cfg.Certificates,
+		NameToCertificate:        cfg.NameToCertificate,
+		GetCertificate:           cfg.GetCertificate,
+		RootCAs:                  cfg.RootCAs,
+		NextProtos:               cfg.NextProtos,
+		ServerName:               cfg.ServerName,
+		ClientAuth:               cfg.ClientAuth,
+		ClientCAs:                cfg.ClientCAs,
+		InsecureSkipVerify:       cfg.InsecureSkipVerify,
+		CipherSuites:             cfg.CipherSuites,
+		PreferServerCipherSuites: cfg.PreferServerCipherSuites,
+		SessionTicketsDisabled:   cfg.SessionTicketsDisabled,
+		SessionTicketKey:         cfg.SessionTicketKey,
+		ClientSessionCache:       cfg.ClientSessionCache,
+		MinVersion:               cfg.MinVersion,
+		MaxVersion:               cfg.MaxVersion,
+		CurvePreferences:         cfg.CurvePreferences,
+	}
+}
diff --git a/vendor/google.golang.org/grpc/credentials/oauth/oauth.go b/vendor/google.golang.org/grpc/credentials/oauth/oauth.go
new file mode 100644
index 00000000000..25393cc641c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/credentials/oauth/oauth.go
@@ -0,0 +1,180 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package oauth implements gRPC credentials using OAuth.
+package oauth
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/google"
+	"golang.org/x/oauth2/jwt"
+	"google.golang.org/grpc/credentials"
+)
+
+// TokenSource supplies PerRPCCredentials from an oauth2.TokenSource.
+type TokenSource struct {
+	oauth2.TokenSource
+}
+
+// GetRequestMetadata gets the request metadata as a map from a TokenSource.
+func (ts TokenSource) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
+	token, err := ts.Token()
+	if err != nil {
+		return nil, err
+	}
+	return map[string]string{
+		"authorization": token.Type() + " " + token.AccessToken,
+	}, nil
+}
+
+// RequireTransportSecurity indicates whether the credentials requires transport security.
+func (ts TokenSource) RequireTransportSecurity() bool {
+	return true
+}
+
+type jwtAccess struct {
+	jsonKey []byte
+}
+
+// NewJWTAccessFromFile creates PerRPCCredentials from the given keyFile.
+func NewJWTAccessFromFile(keyFile string) (credentials.PerRPCCredentials, error) {
+	jsonKey, err := ioutil.ReadFile(keyFile)
+	if err != nil {
+		return nil, fmt.Errorf("credentials: failed to read the service account key file: %v", err)
+	}
+	return NewJWTAccessFromKey(jsonKey)
+}
+
+// NewJWTAccessFromKey creates PerRPCCredentials from the given jsonKey.
+func NewJWTAccessFromKey(jsonKey []byte) (credentials.PerRPCCredentials, error) {
+	return jwtAccess{jsonKey}, nil
+}
+
+func (j jwtAccess) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
+	ts, err := google.JWTAccessTokenSourceFromJSON(j.jsonKey, uri[0])
+	if err != nil {
+		return nil, err
+	}
+	token, err := ts.Token()
+	if err != nil {
+		return nil, err
+	}
+	return map[string]string{
+		"authorization": token.TokenType + " " + token.AccessToken,
+	}, nil
+}
+
+func (j jwtAccess) RequireTransportSecurity() bool {
+	return true
+}
+
+// oauthAccess supplies PerRPCCredentials from a given token.
+type oauthAccess struct {
+	token oauth2.Token
+}
+
+// NewOauthAccess constructs the PerRPCCredentials using a given token.
+func NewOauthAccess(token *oauth2.Token) credentials.PerRPCCredentials {
+	return oauthAccess{token: *token}
+}
+
+func (oa oauthAccess) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
+	return map[string]string{
+		"authorization": oa.token.TokenType + " " + oa.token.AccessToken,
+	}, nil
+}
+
+func (oa oauthAccess) RequireTransportSecurity() bool {
+	return true
+}
+
+// NewComputeEngine constructs the PerRPCCredentials that fetches access tokens from
+// Google Compute Engine (GCE)'s metadata server. It is only valid to use this
+// if your program is running on a GCE instance.
+// TODO(dsymonds): Deprecate and remove this.
+func NewComputeEngine() credentials.PerRPCCredentials {
+	return TokenSource{google.ComputeTokenSource("")}
+}
+
+// serviceAccount represents PerRPCCredentials via JWT signing key.
+type serviceAccount struct {
+	config *jwt.Config
+}
+
+func (s serviceAccount) GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error) {
+	token, err := s.config.TokenSource(ctx).Token()
+	if err != nil {
+		return nil, err
+	}
+	return map[string]string{
+		"authorization": token.TokenType + " " + token.AccessToken,
+	}, nil
+}
+
+func (s serviceAccount) RequireTransportSecurity() bool {
+	return true
+}
+
+// NewServiceAccountFromKey constructs the PerRPCCredentials using the JSON key slice
+// from a Google Developers service account.
+func NewServiceAccountFromKey(jsonKey []byte, scope ...string) (credentials.PerRPCCredentials, error) {
+	config, err := google.JWTConfigFromJSON(jsonKey, scope...)
+	if err != nil {
+		return nil, err
+	}
+	return serviceAccount{config: config}, nil
+}
+
+// NewServiceAccountFromFile constructs the PerRPCCredentials using the JSON key file
+// of a Google Developers service account.
+func NewServiceAccountFromFile(keyFile string, scope ...string) (credentials.PerRPCCredentials, error) {
+	jsonKey, err := ioutil.ReadFile(keyFile)
+	if err != nil {
+		return nil, fmt.Errorf("credentials: failed to read the service account key file: %v", err)
+	}
+	return NewServiceAccountFromKey(jsonKey, scope...)
+}
+
+// NewApplicationDefault returns "Application Default Credentials". For more
+// detail, see https://developers.google.com/accounts/docs/application-default-credentials.
+func NewApplicationDefault(ctx context.Context, scope ...string) (credentials.PerRPCCredentials, error) {
+	t, err := google.DefaultTokenSource(ctx, scope...)
+	if err != nil {
+		return nil, err
+	}
+	return TokenSource{t}, nil
+}
diff --git a/vendor/google.golang.org/grpc/doc.go b/vendor/google.golang.org/grpc/doc.go
new file mode 100644
index 00000000000..a35f218852b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/doc.go
@@ -0,0 +1,6 @@
+/*
+Package grpc implements an RPC system called gRPC.
+
+See www.grpc.io for more information about gRPC.
+*/
+package grpc // import "google.golang.org/grpc"
diff --git a/vendor/google.golang.org/grpc/dot.git/COMMIT_EDITMSG b/vendor/google.golang.org/grpc/dot.git/COMMIT_EDITMSG
new file mode 100644
index 00000000000..8a701b0a61f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/COMMIT_EDITMSG
@@ -0,0 +1 @@
+drop down to *32 initial{Conn}WindowSize
diff --git a/vendor/google.golang.org/grpc/dot.git/FETCH_HEAD b/vendor/google.golang.org/grpc/dot.git/FETCH_HEAD
new file mode 100644
index 00000000000..67b36a4bf97
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/FETCH_HEAD
@@ -0,0 +1 @@
+9720953c46fbe52715000ded6adaa299207127b5		branch 'master' of https://github.com/glycerine/grpc-go
diff --git a/vendor/google.golang.org/grpc/dot.git/HEAD b/vendor/google.golang.org/grpc/dot.git/HEAD
new file mode 100644
index 00000000000..cb089cd89a7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/HEAD
@@ -0,0 +1 @@
+ref: refs/heads/master
diff --git a/vendor/google.golang.org/grpc/dot.git/ORIG_HEAD b/vendor/google.golang.org/grpc/dot.git/ORIG_HEAD
new file mode 100644
index 00000000000..0c86c2dbb4d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/ORIG_HEAD
@@ -0,0 +1 @@
+e42107011e289ffe40269db40a9d7900b578d37f
diff --git a/vendor/google.golang.org/grpc/dot.git/config b/vendor/google.golang.org/grpc/dot.git/config
new file mode 100644
index 00000000000..b974d7761a4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/config
@@ -0,0 +1,22 @@
+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = false
+	logallrefupdates = true
+	ignorecase = true
+	precomposeunicode = true
+[remote "origin"]
+	url = https://github.com/grpc/grpc-go
+	fetch = +refs/heads/*:refs/remotes/origin/*
+[branch "master"]
+	remote = origin
+	merge = refs/heads/master
+[remote "apol"]
+	url = https://github.com/apolcyn/grpc-go
+	fetch = +refs/heads/*:refs/remotes/apol/*
+[remote "glyc"]
+	url = https://github.com/glycerine/grpc-go
+	fetch = +refs/heads/*:refs/remotes/glyc/*
+[user]
+email = "j.e.aten@gmail.com"
+name="Jason E. Aten"
diff --git a/vendor/google.golang.org/grpc/dot.git/description b/vendor/google.golang.org/grpc/dot.git/description
new file mode 100644
index 00000000000..498b267a8c7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/description
@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/applypatch-msg.sample b/vendor/google.golang.org/grpc/dot.git/hooks/applypatch-msg.sample
new file mode 100755
index 00000000000..a5d7b84a673
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/applypatch-msg.sample
@@ -0,0 +1,15 @@
+#!/bin/sh
+#
+# An example hook script to check the commit log message taken by
+# applypatch from an e-mail message.
+#
+# The hook should exit with non-zero status after issuing an
+# appropriate message if it wants to stop the commit.  The hook is
+# allowed to edit the commit message file.
+#
+# To enable this hook, rename this file to "applypatch-msg".
+
+. git-sh-setup
+commitmsg="$(git rev-parse --git-path hooks/commit-msg)"
+test -x "$commitmsg" && exec "$commitmsg" ${1+"$@"}
+:
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/commit-msg.sample b/vendor/google.golang.org/grpc/dot.git/hooks/commit-msg.sample
new file mode 100755
index 00000000000..b58d1184a9d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/commit-msg.sample
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# An example hook script to check the commit log message.
+# Called by "git commit" with one argument, the name of the file
+# that has the commit message.  The hook should exit with non-zero
+# status after issuing an appropriate message if it wants to stop the
+# commit.  The hook is allowed to edit the commit message file.
+#
+# To enable this hook, rename this file to "commit-msg".
+
+# Uncomment the below to add a Signed-off-by line to the message.
+# Doing this in a hook is a bad idea in general, but the prepare-commit-msg
+# hook is more suited to it.
+#
+# SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
+# grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"
+
+# This example catches duplicate Signed-off-by lines.
+
+test "" = "$(grep '^Signed-off-by: ' "$1" |
+	 sort | uniq -c | sed -e '/^[ 	]*1[ 	]/d')" || {
+	echo >&2 Duplicate Signed-off-by lines.
+	exit 1
+}
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/post-update.sample b/vendor/google.golang.org/grpc/dot.git/hooks/post-update.sample
new file mode 100755
index 00000000000..ec17ec1939b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/post-update.sample
@@ -0,0 +1,8 @@
+#!/bin/sh
+#
+# An example hook script to prepare a packed repository for use over
+# dumb transports.
+#
+# To enable this hook, rename this file to "post-update".
+
+exec git update-server-info
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/pre-applypatch.sample b/vendor/google.golang.org/grpc/dot.git/hooks/pre-applypatch.sample
new file mode 100755
index 00000000000..4142082bcb9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/pre-applypatch.sample
@@ -0,0 +1,14 @@
+#!/bin/sh
+#
+# An example hook script to verify what is about to be committed
+# by applypatch from an e-mail message.
+#
+# The hook should exit with non-zero status after issuing an
+# appropriate message if it wants to stop the commit.
+#
+# To enable this hook, rename this file to "pre-applypatch".
+
+. git-sh-setup
+precommit="$(git rev-parse --git-path hooks/pre-commit)"
+test -x "$precommit" && exec "$precommit" ${1+"$@"}
+:
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/pre-commit.sample b/vendor/google.golang.org/grpc/dot.git/hooks/pre-commit.sample
new file mode 100755
index 00000000000..68d62d5446d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/pre-commit.sample
@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# An example hook script to verify what is about to be committed.
+# Called by "git commit" with no arguments.  The hook should
+# exit with non-zero status after issuing an appropriate message if
+# it wants to stop the commit.
+#
+# To enable this hook, rename this file to "pre-commit".
+
+if git rev-parse --verify HEAD >/dev/null 2>&1
+then
+	against=HEAD
+else
+	# Initial commit: diff against an empty tree object
+	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+fi
+
+# If you want to allow non-ASCII filenames set this variable to true.
+allownonascii=$(git config --bool hooks.allownonascii)
+
+# Redirect output to stderr.
+exec 1>&2
+
+# Cross platform projects tend to avoid non-ASCII filenames; prevent
+# them from being added to the repository. We exploit the fact that the
+# printable range starts at the space character and ends with tilde.
+if [ "$allownonascii" != "true" ] &&
+	# Note that the use of brackets around a tr range is ok here, (it's
+	# even required, for portability to Solaris 10's /usr/bin/tr), since
+	# the square bracket bytes happen to fall in the designated range.
+	test $(git diff --cached --name-only --diff-filter=A -z $against |
+	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
+then
+	cat <<\EOF
+Error: Attempt to add a non-ASCII file name.
+
+This can cause problems if you want to work with people on other platforms.
+
+To be portable it is advisable to rename the file.
+
+If you know what you are doing you can disable this check using:
+
+  git config hooks.allownonascii true
+EOF
+	exit 1
+fi
+
+# If there are whitespace errors, print the offending file names and fail.
+exec git diff-index --check --cached $against --
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/pre-push.sample b/vendor/google.golang.org/grpc/dot.git/hooks/pre-push.sample
new file mode 100755
index 00000000000..6187dbf4390
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/pre-push.sample
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# An example hook script to verify what is about to be pushed.  Called by "git
+# push" after it has checked the remote status, but before anything has been
+# pushed.  If this script exits with a non-zero status nothing will be pushed.
+#
+# This hook is called with the following parameters:
+#
+# $1 -- Name of the remote to which the push is being done
+# $2 -- URL to which the push is being done
+#
+# If pushing without using a named remote those arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to
+# the standard input in the form:
+#
+#   <local ref> <local sha1> <remote ref> <remote sha1>
+#
+# This sample shows how to prevent push of commits where the log message starts
+# with "WIP" (work in progress).
+
+remote="$1"
+url="$2"
+
+z40=0000000000000000000000000000000000000000
+
+while read local_ref local_sha remote_ref remote_sha
+do
+	if [ "$local_sha" = $z40 ]
+	then
+		# Handle delete
+		:
+	else
+		if [ "$remote_sha" = $z40 ]
+		then
+			# New branch, examine all commits
+			range="$local_sha"
+		else
+			# Update to existing branch, examine new commits
+			range="$remote_sha..$local_sha"
+		fi
+
+		# Check for WIP commit
+		commit=`git rev-list -n 1 --grep '^WIP' "$range"`
+		if [ -n "$commit" ]
+		then
+			echo >&2 "Found WIP commit in $local_ref, not pushing"
+			exit 1
+		fi
+	fi
+done
+
+exit 0
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/pre-rebase.sample b/vendor/google.golang.org/grpc/dot.git/hooks/pre-rebase.sample
new file mode 100755
index 00000000000..9773ed4cb29
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/pre-rebase.sample
@@ -0,0 +1,169 @@
+#!/bin/sh
+#
+# Copyright (c) 2006, 2008 Junio C Hamano
+#
+# The "pre-rebase" hook is run just before "git rebase" starts doing
+# its job, and can prevent the command from running by exiting with
+# non-zero status.
+#
+# The hook is called with the following parameters:
+#
+# $1 -- the upstream the series was forked from.
+# $2 -- the branch being rebased (or empty when rebasing the current branch).
+#
+# This sample shows how to prevent topic branches that are already
+# merged to 'next' branch from getting rebased, because allowing it
+# would result in rebasing already published history.
+
+publish=next
+basebranch="$1"
+if test "$#" = 2
+then
+	topic="refs/heads/$2"
+else
+	topic=`git symbolic-ref HEAD` ||
+	exit 0 ;# we do not interrupt rebasing detached HEAD
+fi
+
+case "$topic" in
+refs/heads/??/*)
+	;;
+*)
+	exit 0 ;# we do not interrupt others.
+	;;
+esac
+
+# Now we are dealing with a topic branch being rebased
+# on top of master.  Is it OK to rebase it?
+
+# Does the topic really exist?
+git show-ref -q "$topic" || {
+	echo >&2 "No such branch $topic"
+	exit 1
+}
+
+# Is topic fully merged to master?
+not_in_master=`git rev-list --pretty=oneline ^master "$topic"`
+if test -z "$not_in_master"
+then
+	echo >&2 "$topic is fully merged to master; better remove it."
+	exit 1 ;# we could allow it, but there is no point.
+fi
+
+# Is topic ever merged to next?  If so you should not be rebasing it.
+only_next_1=`git rev-list ^master "^$topic" ${publish} | sort`
+only_next_2=`git rev-list ^master           ${publish} | sort`
+if test "$only_next_1" = "$only_next_2"
+then
+	not_in_topic=`git rev-list "^$topic" master`
+	if test -z "$not_in_topic"
+	then
+		echo >&2 "$topic is already up-to-date with master"
+		exit 1 ;# we could allow it, but there is no point.
+	else
+		exit 0
+	fi
+else
+	not_in_next=`git rev-list --pretty=oneline ^${publish} "$topic"`
+	/usr/bin/perl -e '
+		my $topic = $ARGV[0];
+		my $msg = "* $topic has commits already merged to public branch:\n";
+		my (%not_in_next) = map {
+			/^([0-9a-f]+) /;
+			($1 => 1);
+		} split(/\n/, $ARGV[1]);
+		for my $elem (map {
+				/^([0-9a-f]+) (.*)$/;
+				[$1 => $2];
+			} split(/\n/, $ARGV[2])) {
+			if (!exists $not_in_next{$elem->[0]}) {
+				if ($msg) {
+					print STDERR $msg;
+					undef $msg;
+				}
+				print STDERR " $elem->[1]\n";
+			}
+		}
+	' "$topic" "$not_in_next" "$not_in_master"
+	exit 1
+fi
+
+exit 0
+
+################################################################
+
+This sample hook safeguards topic branches that have been
+published from being rewound.
+
+The workflow assumed here is:
+
+ * Once a topic branch forks from "master", "master" is never
+   merged into it again (either directly or indirectly).
+
+ * Once a topic branch is fully cooked and merged into "master",
+   it is deleted.  If you need to build on top of it to correct
+   earlier mistakes, a new topic branch is created by forking at
+   the tip of the "master".  This is not strictly necessary, but
+   it makes it easier to keep your history simple.
+
+ * Whenever you need to test or publish your changes to topic
+   branches, merge them into "next" branch.
+
+The script, being an example, hardcodes the publish branch name
+to be "next", but it is trivial to make it configurable via
+$GIT_DIR/config mechanism.
+
+With this workflow, you would want to know:
+
+(1) ... if a topic branch has ever been merged to "next".  Young
+    topic branches can have stupid mistakes you would rather
+    clean up before publishing, and things that have not been
+    merged into other branches can be easily rebased without
+    affecting other people.  But once it is published, you would
+    not want to rewind it.
+
+(2) ... if a topic branch has been fully merged to "master".
+    Then you can delete it.  More importantly, you should not
+    build on top of it -- other people may already want to
+    change things related to the topic as patches against your
+    "master", so if you need further changes, it is better to
+    fork the topic (perhaps with the same name) afresh from the
+    tip of "master".
+
+Let's look at this example:
+
+		   o---o---o---o---o---o---o---o---o---o "next"
+		  /       /           /           /
+		 /   a---a---b A     /           /
+		/   /               /           /
+	       /   /   c---c---c---c B         /
+	      /   /   /             \         /
+	     /   /   /   b---b C     \       /
+	    /   /   /   /             \     /
+    ---o---o---o---o---o---o---o---o---o---o---o "master"
+
+
+A, B and C are topic branches.
+
+ * A has one fix since it was merged up to "next".
+
+ * B has finished.  It has been fully merged up to "master" and "next",
+   and is ready to be deleted.
+
+ * C has not merged to "next" at all.
+
+We would want to allow C to be rebased, refuse A, and encourage
+B to be deleted.
+
+To compute (1):
+
+	git rev-list ^master ^topic next
+	git rev-list ^master        next
+
+	if these match, topic has not merged in next at all.
+
+To compute (2):
+
+	git rev-list master..topic
+
+	if this is empty, it is fully merged to "master".
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/prepare-commit-msg.sample b/vendor/google.golang.org/grpc/dot.git/hooks/prepare-commit-msg.sample
new file mode 100755
index 00000000000..f093a02ec49
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/prepare-commit-msg.sample
@@ -0,0 +1,36 @@
+#!/bin/sh
+#
+# An example hook script to prepare the commit log message.
+# Called by "git commit" with the name of the file that has the
+# commit message, followed by the description of the commit
+# message's source.  The hook's purpose is to edit the commit
+# message file.  If the hook fails with a non-zero status,
+# the commit is aborted.
+#
+# To enable this hook, rename this file to "prepare-commit-msg".
+
+# This hook includes three examples.  The first comments out the
+# "Conflicts:" part of a merge commit.
+#
+# The second includes the output of "git diff --name-status -r"
+# into the message, just before the "git status" output.  It is
+# commented because it doesn't cope with --amend or with squashed
+# commits.
+#
+# The third example adds a Signed-off-by line to the message, that can
+# still be edited.  This is rarely a good idea.
+
+case "$2,$3" in
+  merge,)
+    /usr/bin/perl -i.bak -ne 's/^/# /, s/^# #/#/ if /^Conflicts/ .. /#/; print' "$1" ;;
+
+# ,|template,)
+#   /usr/bin/perl -i.bak -pe '
+#      print "\n" . `git diff --cached --name-status -r`
+#	 if /^#/ && $first++ == 0' "$1" ;;
+
+  *) ;;
+esac
+
+# SOB=$(git var GIT_AUTHOR_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p')
+# grep -qs "^$SOB" "$1" || echo "$SOB" >> "$1"
diff --git a/vendor/google.golang.org/grpc/dot.git/hooks/update.sample b/vendor/google.golang.org/grpc/dot.git/hooks/update.sample
new file mode 100755
index 00000000000..80ba94135cc
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/hooks/update.sample
@@ -0,0 +1,128 @@
+#!/bin/sh
+#
+# An example hook script to block unannotated tags from entering.
+# Called by "git receive-pack" with arguments: refname sha1-old sha1-new
+#
+# To enable this hook, rename this file to "update".
+#
+# Config
+# ------
+# hooks.allowunannotated
+#   This boolean sets whether unannotated tags will be allowed into the
+#   repository.  By default they won't be.
+# hooks.allowdeletetag
+#   This boolean sets whether deleting tags will be allowed in the
+#   repository.  By default they won't be.
+# hooks.allowmodifytag
+#   This boolean sets whether a tag may be modified after creation. By default
+#   it won't be.
+# hooks.allowdeletebranch
+#   This boolean sets whether deleting branches will be allowed in the
+#   repository.  By default they won't be.
+# hooks.denycreatebranch
+#   This boolean sets whether remotely creating branches will be denied
+#   in the repository.  By default this is allowed.
+#
+
+# --- Command line
+refname="$1"
+oldrev="$2"
+newrev="$3"
+
+# --- Safety check
+if [ -z "$GIT_DIR" ]; then
+	echo "Don't run this script from the command line." >&2
+	echo " (if you want, you could supply GIT_DIR then run" >&2
+	echo "  $0 <ref> <oldrev> <newrev>)" >&2
+	exit 1
+fi
+
+if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then
+	echo "usage: $0 <ref> <oldrev> <newrev>" >&2
+	exit 1
+fi
+
+# --- Config
+allowunannotated=$(git config --bool hooks.allowunannotated)
+allowdeletebranch=$(git config --bool hooks.allowdeletebranch)
+denycreatebranch=$(git config --bool hooks.denycreatebranch)
+allowdeletetag=$(git config --bool hooks.allowdeletetag)
+allowmodifytag=$(git config --bool hooks.allowmodifytag)
+
+# check for no description
+projectdesc=$(sed -e '1q' "$GIT_DIR/description")
+case "$projectdesc" in
+"Unnamed repository"* | "")
+	echo "*** Project description file hasn't been set" >&2
+	exit 1
+	;;
+esac
+
+# --- Check types
+# if $newrev is 0000...0000, it's a commit to delete a ref.
+zero="0000000000000000000000000000000000000000"
+if [ "$newrev" = "$zero" ]; then
+	newrev_type=delete
+else
+	newrev_type=$(git cat-file -t $newrev)
+fi
+
+case "$refname","$newrev_type" in
+	refs/tags/*,commit)
+		# un-annotated tag
+		short_refname=${refname##refs/tags/}
+		if [ "$allowunannotated" != "true" ]; then
+			echo "*** The un-annotated tag, $short_refname, is not allowed in this repository" >&2
+			echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate." >&2
+			exit 1
+		fi
+		;;
+	refs/tags/*,delete)
+		# delete tag
+		if [ "$allowdeletetag" != "true" ]; then
+			echo "*** Deleting a tag is not allowed in this repository" >&2
+			exit 1
+		fi
+		;;
+	refs/tags/*,tag)
+		# annotated tag
+		if [ "$allowmodifytag" != "true" ] && git rev-parse $refname > /dev/null 2>&1
+		then
+			echo "*** Tag '$refname' already exists." >&2
+			echo "*** Modifying a tag is not allowed in this repository." >&2
+			exit 1
+		fi
+		;;
+	refs/heads/*,commit)
+		# branch
+		if [ "$oldrev" = "$zero" -a "$denycreatebranch" = "true" ]; then
+			echo "*** Creating a branch is not allowed in this repository" >&2
+			exit 1
+		fi
+		;;
+	refs/heads/*,delete)
+		# delete branch
+		if [ "$allowdeletebranch" != "true" ]; then
+			echo "*** Deleting a branch is not allowed in this repository" >&2
+			exit 1
+		fi
+		;;
+	refs/remotes/*,commit)
+		# tracking branch
+		;;
+	refs/remotes/*,delete)
+		# delete tracking branch
+		if [ "$allowdeletebranch" != "true" ]; then
+			echo "*** Deleting a tracking branch is not allowed in this repository" >&2
+			exit 1
+		fi
+		;;
+	*)
+		# Anything else (is there anything else?)
+		echo "*** Update hook: unknown type of update to ref $refname of type $newrev_type" >&2
+		exit 1
+		;;
+esac
+
+# --- Finished
+exit 0
diff --git a/vendor/google.golang.org/grpc/dot.git/index b/vendor/google.golang.org/grpc/dot.git/index
new file mode 100644
index 00000000000..66276115b2e
Binary files /dev/null and b/vendor/google.golang.org/grpc/dot.git/index differ
diff --git a/vendor/google.golang.org/grpc/dot.git/info/exclude b/vendor/google.golang.org/grpc/dot.git/info/exclude
new file mode 100644
index 00000000000..a5196d1be8f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/info/exclude
@@ -0,0 +1,6 @@
+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/HEAD b/vendor/google.golang.org/grpc/dot.git/logs/HEAD
new file mode 100644
index 00000000000..1ed5b31385e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/HEAD
@@ -0,0 +1,15 @@
+0000000000000000000000000000000000000000 2a6bf6142e96942e4fb9c0dfb157ee5d3cecafaa Jason E. Aten <jaten@saucelabs.com> 1486514672 -0600	clone: from https://github.com/grpc/grpc-go
+2a6bf6142e96942e4fb9c0dfb157ee5d3cecafaa d0c32ee6a441117d49856d6120ca9552af413ee0 Jason E. Aten <jaten@saucelabs.com> 1487484452 -0600	pull --ff-only: Fast-forward
+d0c32ee6a441117d49856d6120ca9552af413ee0 14a6be430b5164b888c95ac962129546c85831e7 Jason E. Aten <jaten@saucelabs.com> 1490601438 -0500	pull --ff-only: Fast-forward
+14a6be430b5164b888c95ac962129546c85831e7 9720953c46fbe52715000ded6adaa299207127b5 Jason E. Aten <jaten@saucelabs.com> 1490918041 -0500	checkout: moving from master to glyc/master
+9720953c46fbe52715000ded6adaa299207127b5 9720953c46fbe52715000ded6adaa299207127b5 Jason E. Aten <jaten@saucelabs.com> 1490918089 -0500	checkout: moving from 9720953c46fbe52715000ded6adaa299207127b5 to glycmaster
+9720953c46fbe52715000ded6adaa299207127b5 e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918157 -0500	commit: drop down to *32 initial{Conn}WindowSize
+e42107011e289ffe40269db40a9d7900b578d37f 9720953c46fbe52715000ded6adaa299207127b5 Jason E. Aten <j.e.aten@gmail.com> 1490918170 -0500	checkout: moving from glycmaster to glyc/master
+9720953c46fbe52715000ded6adaa299207127b5 e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918177 -0500	checkout: moving from 9720953c46fbe52715000ded6adaa299207127b5 to glycmaster
+e42107011e289ffe40269db40a9d7900b578d37f e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918205 -0500	checkout: moving from glycmaster to glyc/master
+e42107011e289ffe40269db40a9d7900b578d37f e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918388 -0500	checkout: moving from glyc/master to glyc/master
+e42107011e289ffe40269db40a9d7900b578d37f e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918401 -0500	checkout: moving from glyc/master to master
+e42107011e289ffe40269db40a9d7900b578d37f 7fc29d0caa400efc53212b222356f99efe87d7d5 Jason E. Aten <j.e.aten@gmail.com> 1490918432 -0500	rebase: checkout origin/master
+7fc29d0caa400efc53212b222356f99efe87d7d5 4d403c1e605a3b892f39d421fa812dc7d3da92e4 Jason E. Aten <j.e.aten@gmail.com> 1490918432 -0500	rebase: increase initialWindowSize and initialConnWindowSize by 2048.
+4d403c1e605a3b892f39d421fa812dc7d3da92e4 3cefdc3128f2ea2ef2475e7f8697ec1d98865999 Jason E. Aten <j.e.aten@gmail.com> 1490918432 -0500	rebase: drop down to *32 initial{Conn}WindowSize
+3cefdc3128f2ea2ef2475e7f8697ec1d98865999 3cefdc3128f2ea2ef2475e7f8697ec1d98865999 Jason E. Aten <j.e.aten@gmail.com> 1490918432 -0500	rebase finished: returning to refs/heads/master
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glyc/master b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glyc/master
new file mode 100644
index 00000000000..5872a14f2b7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glyc/master
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918186 -0500	branch: Created from glycmaster
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glycmaster b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glycmaster
new file mode 100644
index 00000000000..c83a1104dee
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/glycmaster
@@ -0,0 +1,2 @@
+0000000000000000000000000000000000000000 9720953c46fbe52715000ded6adaa299207127b5 Jason E. Aten <jaten@saucelabs.com> 1490918089 -0500	branch: Created from HEAD
+9720953c46fbe52715000ded6adaa299207127b5 e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918157 -0500	commit: drop down to *32 initial{Conn}WindowSize
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/master b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/master
new file mode 100644
index 00000000000..397f240bbe7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/heads/master
@@ -0,0 +1,5 @@
+0000000000000000000000000000000000000000 2a6bf6142e96942e4fb9c0dfb157ee5d3cecafaa Jason E. Aten <jaten@saucelabs.com> 1486514672 -0600	clone: from https://github.com/grpc/grpc-go
+2a6bf6142e96942e4fb9c0dfb157ee5d3cecafaa d0c32ee6a441117d49856d6120ca9552af413ee0 Jason E. Aten <jaten@saucelabs.com> 1487484452 -0600	pull --ff-only: Fast-forward
+d0c32ee6a441117d49856d6120ca9552af413ee0 14a6be430b5164b888c95ac962129546c85831e7 Jason E. Aten <jaten@saucelabs.com> 1490601438 -0500	pull --ff-only: Fast-forward
+14a6be430b5164b888c95ac962129546c85831e7 e42107011e289ffe40269db40a9d7900b578d37f Jason E. Aten <j.e.aten@gmail.com> 1490918337 -0500	branch: Reset to glycmaster
+e42107011e289ffe40269db40a9d7900b578d37f 3cefdc3128f2ea2ef2475e7f8697ec1d98865999 Jason E. Aten <j.e.aten@gmail.com> 1490918432 -0500	rebase finished: refs/heads/master onto 7fc29d0caa400efc53212b222356f99efe87d7d5
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/account_for_padding b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/account_for_padding
new file mode 100644
index 00000000000..21e6258d14e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/account_for_padding
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 3de1621ff6e44ecbfb74f6a619d8688bc3e7a699 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_rusage b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_rusage
new file mode 100644
index 00000000000..469fa2b61d5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_rusage
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 99db3d2b62111a8298756e021e74ddce88ea1afc Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm
new file mode 100644
index 00000000000..3fff826e636
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 fa1742ef8bdb12e92c3573c04294a6befafbaf4c Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm_rebased b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm_rebased
new file mode 100644
index 00000000000..790cb228603
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_cpu_usage_to_bm_rebased
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 b5cd5e6016e0cdf7b92bf5cebb4876c30b91889a Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_profiling_server_to_benchmark b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_profiling_server_to_benchmark
new file mode 100644
index 00000000000..b130e820fc8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_profiling_server_to_benchmark
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 9e34c9fd7f41729f602c4c392e03755e82ad2df0 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_static_recv_block_on_stream b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_static_recv_block_on_stream
new file mode 100644
index 00000000000..5d5b55564c8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_static_recv_block_on_stream
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 f8b513cbffc7cf43dae0b1547c45b63aec41bf20 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_test_for_large_message_to_small_window b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_test_for_large_message_to_small_window
new file mode 100644
index 00000000000..c19c65cb87c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/add_test_for_large_message_to_small_window
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 9952ead564abb8a0a8e0df403254fa9fbb14ffe8 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bench_protocodec b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bench_protocodec
new file mode 100644
index 00000000000..857343f8181
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bench_protocodec
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 c964db737c08135fb069bbb3b20bbb56654d528f Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/benchmark_go_net b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/benchmark_go_net
new file mode 100644
index 00000000000..8b1dc846604
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/benchmark_go_net
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 ab38acd4433fec2fa6f90acb1fc8c4a54283063f Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bigger_transport_quota_pool b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bigger_transport_quota_pool
new file mode 100644
index 00000000000..85049952b20
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/bigger_transport_quota_pool
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 05946f668dbc1cc54144568ecefd369b6ef7aea0 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_certs_in_bm b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_certs_in_bm
new file mode 100644
index 00000000000..7385b9e4fc7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_certs_in_bm
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 3423caa424543e35d0a34869d7fa9c0d1fe2aebb Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_gogc_in_go_benchmarks b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_gogc_in_go_benchmarks
new file mode 100644
index 00000000000..3ee95892c5a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/change_gogc_in_go_benchmarks
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 83ada8000284b4539319d52c7d4179c510455eff Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/count_rpcs_in_benchmarks b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/count_rpcs_in_benchmarks
new file mode 100644
index 00000000000..4f412643a15
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/count_rpcs_in_benchmarks
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 df61d5f575a96997ab4846e50de07801e542e8ad Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/debug_counters b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/debug_counters
new file mode 100644
index 00000000000..33df7142046
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/debug_counters
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 10fcf8b7c65d0385eecfe423935442de9b41d2bf Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_goroutine_combo b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_goroutine_combo
new file mode 100644
index 00000000000..6bc2f8d4b4b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_goroutine_combo
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 be64beaf79ffaa567bd4613a8662f0e67eb0651b Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_routine_and_check_in_queue b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_routine_and_check_in_queue
new file mode 100644
index 00000000000..8ebdecea775
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_flush_remove_routine_and_check_in_queue
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 d054e6f18d19b50a0e314e53c94984e584748e78 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_no_reader b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_no_reader
new file mode 100644
index 00000000000..61e1c72f851
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_no_reader
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 7e3cdcf5f7765d3948182e997b522705ffe352e1 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_opt_recv_combo b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_opt_recv_combo
new file mode 100644
index 00000000000..77aeb0a8c99
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_remove_opt_recv_combo
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 1cd46a11ece5a706697f6b0c76cfd0fabc4901fc Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_write_flushes_master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_write_flushes_master
new file mode 100644
index 00000000000..9bdc6a67c98
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/defer_write_flushes_master
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 42f12a6db06456b3e308815f7877b4a346e82d72 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_alloc_new_slice_for_header b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_alloc_new_slice_for_header
new file mode 100644
index 00000000000..f4c95b15032
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_alloc_new_slice_for_header
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 f09813ba8e47aeee29ea76ca292242bce4ff435f Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_use_reader_in_recv_msg b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_use_reader_in_recv_msg
new file mode 100644
index 00000000000..2617aebfe33
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/dont_use_reader_in_recv_msg
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 b6129715b7b78d1fad21f6ae85db5dc5cb85bfcf Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/expose_qps_worker_starter b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/expose_qps_worker_starter
new file mode 100644
index 00000000000..2cce64a4dd0
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/expose_qps_worker_starter
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 ac5e8762a5003ecc710ca639855abfac221fa261 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/final_marshal_proto_with_buffer b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/final_marshal_proto_with_buffer
new file mode 100644
index 00000000000..d9f0a2b16cd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/final_marshal_proto_with_buffer
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 663442b970500a045f644d611bacd27d84370ae6 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/fix_flow_control_padding b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/fix_flow_control_padding
new file mode 100644
index 00000000000..b9dd69175e9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/fix_flow_control_padding
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 fc303ae786490d0ea5fa82fb0a8f4961f698cb5c Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_enqueue b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_enqueue
new file mode 100644
index 00000000000..095fd204f42
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_enqueue
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 c669a98b9cbade9a73a9fc0e91e33be1fab29e34 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_no_combo b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_no_combo
new file mode 100644
index 00000000000..0a120ab294e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_no_combo
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 ad139b7d8f6cc3d0d36fe3747160b2257d831c37 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once
new file mode 100644
index 00000000000..4fac9ba34df
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 89a894ec61c8c5c218c131ca554c6169c0ec8231 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_cleanup b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_cleanup
new file mode 100644
index 00000000000..bdce633c58b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_cleanup
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 b787b648f270bbdfe7d9389b2a0c071e4ae1408a Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_in_status b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_in_status
new file mode 100644
index 00000000000..5c60dd3060d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_in_status
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 7e173764ee8a7e50e14d4a11537aea3f438b3fcf Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master
new file mode 100644
index 00000000000..572a74ff511
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_exp b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_exp
new file mode 100644
index 00000000000..509d3a8792c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_exp
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 e5a0f12e3dc9591a93ffbfd85aa761830c354d3f Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_temp b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_temp
new file mode 100644
index 00000000000..1cc6736a646
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_master_temp
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 a6914476cceb81eadcd8781b052042db9950696f Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_no_combo_cleanup b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_no_combo_cleanup
new file mode 100644
index 00000000000..a9f8b20df31
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/flush_server_unary_once_no_combo_cleanup
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/global_writers_on_reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/global_writers_on_reduce_streaming_mem
new file mode 100644
index 00000000000..e0b5c748c3d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/global_writers_on_reduce_streaming_mem
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/large_transport_windows b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/large_transport_windows
new file mode 100644
index 00000000000..eb4b7f1907c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/large_transport_windows
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer
new file mode 100644
index 00000000000..1c6d8cd40f7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer_per_conn b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer_per_conn
new file mode 100644
index 00000000000..56c712eab2a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/marshal_proto_with_buffer_per_conn
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master
new file mode 100644
index 00000000000..25c3a64cb47
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master_debug_servers b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master_debug_servers
new file mode 100644
index 00000000000..a65b1e64b82
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/master_debug_servers
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/merge_marshal_proto_with_buffer_per_conn_remove b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/merge_marshal_proto_with_buffer_per_conn_remove
new file mode 100644
index 00000000000..56c712eab2a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/merge_marshal_proto_with_buffer_per_conn_remove
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/move_write_logic_to_queue b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/move_write_logic_to_queue
new file mode 100644
index 00000000000..bda0e243a72
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/move_write_logic_to_queue
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/netperf_experiments b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/netperf_experiments
new file mode 100644
index 00000000000..896e974c6f4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/netperf_experiments
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/nogomax b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/nogomax
new file mode 100644
index 00000000000..b892b290113
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/nogomax
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/only_use_buffers_on_marshalling_side b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/only_use_buffers_on_marshalling_side
new file mode 100644
index 00000000000..50af1d647dd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/only_use_buffers_on_marshalling_side
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_cache_reimpl b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_cache_reimpl
new file mode 100644
index 00000000000..2fd3882d5dd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_cache_reimpl
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_conn_cache_simple b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_conn_cache_simple
new file mode 100644
index 00000000000..7b0e3d5deef
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_conn_cache_simple
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools
new file mode 100644
index 00000000000..62321201cbe
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools
@@ -0,0 +1,2 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_no_slice_cache b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_no_slice_cache
new file mode 100644
index 00000000000..cd31597d111
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_no_slice_cache
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_racey b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_racey
new file mode 100644
index 00000000000..538fecb608f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_global_pools_racey
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool
new file mode 100644
index 00000000000..c40bbf43a54
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool_temp b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool_temp
new file mode 100644
index 00000000000..19ff5d6cc25
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_per_conn_pool_temp
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_pool_sync_pool b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_pool_sync_pool
new file mode 100644
index 00000000000..be2e6b8f755
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/proto_buf_pool_sync_pool
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_benchmark b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_benchmark
new file mode 100644
index 00000000000..6c9fe517725
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_benchmark
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_server_two_goroutine b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_server_two_goroutine
new file mode 100644
index 00000000000..e929fbe492e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/raw_tcp_server_two_goroutine
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_benchmark_allocs b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_benchmark_allocs
new file mode 100644
index 00000000000..b820bcb740a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_benchmark_allocs
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_flush_two_client b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_flush_two_client
new file mode 100644
index 00000000000..ced99a5a980
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_flush_two_client
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs
new file mode 100644
index 00000000000..9a7470ed20e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf
new file mode 100644
index 00000000000..8db8e437c7c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_options_allocs b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_options_allocs
new file mode 100644
index 00000000000..eb86a8c9572
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_options_allocs
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_recv_message_cpu b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_recv_message_cpu
new file mode 100644
index 00000000000..e679c75b44f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_recv_message_cpu
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem
new file mode 100644
index 00000000000..e39d2badf32
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface
new file mode 100644
index 00000000000..94049b5b230
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_unary_mem b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_unary_mem
new file mode 100644
index 00000000000..97483e3a082
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/reduce_unary_mem
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_alloc_in_transport_write b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_alloc_in_transport_write
new file mode 100644
index 00000000000..2794b75f1d5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_alloc_in_transport_write
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv
new file mode 100644
index 00000000000..00ba13e1102
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf
new file mode 100644
index 00000000000..f7b6a1d381d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 33776479612e7a4b3853a8daaefc822e7a210e5d Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_defer_in_recv_msg_reader b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_defer_in_recv_msg_reader
new file mode 100644
index 00000000000..88cdca2e311
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_defer_in_recv_msg_reader
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 dd0acfa3dd07840af8cc11c7413f5b58aa89bed2 Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients
new file mode 100644
index 00000000000..c113f95422b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 388da4269c1a1dbfd5e550231a71f063c76215bd Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients
new file mode 100644
index 00000000000..6153e7a2980
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message
new file mode 100644
index 00000000000..cddac3e8030
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message
@@ -0,0 +1 @@
+0000000000000000000000000000000000000000 74f62a8924be725d2aca703307b371a828ec37ef Jason E. Aten <jaten@saucelabs.com> 1490614961 -0500	fetch --append apol: storing head
diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1 b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1
new file mode 100644
index 00000000000..d7566471631
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/repro_raw_tcp_latency_byte_buf b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/repro_raw_tcp_latency_byte_buf
new file mode 100644
index 00000000000..cdc11d48e3a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/repro_raw_tcp_latency_byte_buf
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_batching_on_reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_batching_on_reduce_streaming_mem
new file mode 100644
index 00000000000..f86f1687b74
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_batching_on_reduce_streaming_mem
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_defer_flush b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_defer_flush
new file mode 100644
index 00000000000..b940ce1653b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/retry_defer_flush
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control
new file mode 100644
index 00000000000..50f29364331
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control_master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control_master
new file mode 100644
index 00000000000..b3c5424c21c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/revise_flow_control_master
@@ -0,0 +1,2 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/server_latencies b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/server_latencies
new file mode 100644
index 00000000000..5167e070613
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/server_latencies
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/speedup_client_bm b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/speedup_client_bm
new file mode 100644
index 00000000000..eb98096d5dc
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/speedup_client_bm
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/suspect b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/suspect
new file mode 100644
index 00000000000..b4d16d32c3b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/suspect
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp
new file mode 100644
index 00000000000..ffb4cd59c17
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp2 b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp2
new file mode 100644
index 00000000000..50777451eaf
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp2
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp_trial b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/temp_trial
new file mode 100644
index 00000000000..8056855ff3c
--- /dev/null
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@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/try_remove_goroutine_around_unary b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/try_remove_goroutine_around_unary
new file mode 100644
index 00000000000..075ea72f59d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/try_remove_goroutine_around_unary
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/update_go_readme b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/update_go_readme
new file mode 100644
index 00000000000..70e150192c2
--- /dev/null
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@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_buffer_for_proto_actual b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_buffer_for_proto_actual
new file mode 100644
index 00000000000..339f36de08e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_buffer_for_proto_actual
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_cached_data_frames_on_framer b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_cached_data_frames_on_framer
new file mode 100644
index 00000000000..18fc9f7eab8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_cached_data_frames_on_framer
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_proto_buffer_master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/use_proto_buffer_master
new file mode 100644
index 00000000000..d550db03b37
--- /dev/null
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@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/write_in_controller_queue b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/write_in_controller_queue
new file mode 100644
index 00000000000..671759d530a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/apol/write_in_controller_queue
@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/default_window_128mb b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/default_window_128mb
new file mode 100644
index 00000000000..bd9383b5226
--- /dev/null
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@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/master
new file mode 100644
index 00000000000..dd9669fb434
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/master
@@ -0,0 +1,3 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/v1.2.x b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/glyc/v1.2.x
new file mode 100644
index 00000000000..8444af10e72
--- /dev/null
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@@ -0,0 +1 @@
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/HEAD b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/HEAD
new file mode 100644
index 00000000000..bef808fd3ff
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/master b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/master
new file mode 100644
index 00000000000..200c96912a4
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/v1.2.x b/vendor/google.golang.org/grpc/dot.git/logs/refs/remotes/origin/v1.2.x
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index 00000000000..8cf03865b91
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_profiling_server_to_benchmark
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_static_recv_block_on_stream b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_static_recv_block_on_stream
new file mode 100644
index 00000000000..49330ce0c2a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_static_recv_block_on_stream
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_test_for_large_message_to_small_window b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/add_test_for_large_message_to_small_window
new file mode 100644
index 00000000000..0023148fb5f
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/bench_protocodec b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/bench_protocodec
new file mode 100644
index 00000000000..71dc4abb5d0
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/benchmark_go_net b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/benchmark_go_net
new file mode 100644
index 00000000000..71b8a32d9bd
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/bigger_transport_quota_pool b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/bigger_transport_quota_pool
new file mode 100644
index 00000000000..ef9c1697964
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/change_certs_in_bm b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/change_certs_in_bm
new file mode 100644
index 00000000000..81c8c953d79
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/change_gogc_in_go_benchmarks b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/change_gogc_in_go_benchmarks
new file mode 100644
index 00000000000..b52aa9c385e
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/count_rpcs_in_benchmarks b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/count_rpcs_in_benchmarks
new file mode 100644
index 00000000000..c50ea33dd78
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/debug_counters b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/debug_counters
new file mode 100644
index 00000000000..a7c4bea1996
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_flush_remove_goroutine_combo b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_flush_remove_goroutine_combo
new file mode 100644
index 00000000000..304c3b5cc7f
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_flush_remove_routine_and_check_in_queue b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_flush_remove_routine_and_check_in_queue
new file mode 100644
index 00000000000..316f4aad3bf
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_remove_no_reader b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_remove_no_reader
new file mode 100644
index 00000000000..39324b5dbf7
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_remove_opt_recv_combo b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_remove_opt_recv_combo
new file mode 100644
index 00000000000..804b87a4f02
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_write_flushes_master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/defer_write_flushes_master
new file mode 100644
index 00000000000..f6e16a73b33
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/dont_alloc_new_slice_for_header b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/dont_alloc_new_slice_for_header
new file mode 100644
index 00000000000..4e97ab3666c
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/dont_use_reader_in_recv_msg b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/dont_use_reader_in_recv_msg
new file mode 100644
index 00000000000..54b110c0751
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/expose_qps_worker_starter b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/expose_qps_worker_starter
new file mode 100644
index 00000000000..5111125d715
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/final_marshal_proto_with_buffer b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/final_marshal_proto_with_buffer
new file mode 100644
index 00000000000..eff36b73068
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/fix_flow_control_padding b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/fix_flow_control_padding
new file mode 100644
index 00000000000..b8270685961
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_enqueue b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_enqueue
new file mode 100644
index 00000000000..d2972f857b8
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_no_combo b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_no_combo
new file mode 100644
index 00000000000..9114cbea74f
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once
new file mode 100644
index 00000000000..0c46914b985
--- /dev/null
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_cleanup b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_cleanup
new file mode 100644
index 00000000000..97078cd12b7
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_in_status b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_in_status
new file mode 100644
index 00000000000..2cd2a281c9f
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master
new file mode 100644
index 00000000000..33f9c9d69f9
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master_exp b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master_exp
new file mode 100644
index 00000000000..f327f03f817
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master_temp b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_master_temp
new file mode 100644
index 00000000000..142bb11ecf1
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_no_combo_cleanup b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/flush_server_unary_once_no_combo_cleanup
new file mode 100644
index 00000000000..94934a536b8
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/global_writers_on_reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/global_writers_on_reduce_streaming_mem
new file mode 100644
index 00000000000..a563dca7ee9
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/large_transport_windows b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/large_transport_windows
new file mode 100644
index 00000000000..4bbaa9c684b
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/marshal_proto_with_buffer b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/marshal_proto_with_buffer
new file mode 100644
index 00000000000..f4a6dea7168
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/marshal_proto_with_buffer_per_conn b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/marshal_proto_with_buffer_per_conn
new file mode 100644
index 00000000000..3dc154cc750
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/master
new file mode 100644
index 00000000000..889c57c989e
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/master_debug_servers b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/master_debug_servers
new file mode 100644
index 00000000000..1dfde3bbb5d
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/merge_marshal_proto_with_buffer_per_conn_remove b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/merge_marshal_proto_with_buffer_per_conn_remove
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index 00000000000..3dc154cc750
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/move_write_logic_to_queue b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/move_write_logic_to_queue
new file mode 100644
index 00000000000..df343ac5d08
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/netperf_experiments b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/netperf_experiments
new file mode 100644
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/nogomax b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/nogomax
new file mode 100644
index 00000000000..330858c6395
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/only_use_buffers_on_marshalling_side b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/only_use_buffers_on_marshalling_side
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_conn_cache_simple b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_conn_cache_simple
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_global_pools_no_slice_cache b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_global_pools_no_slice_cache
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_global_pools_racey b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_global_pools_racey
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_per_conn_pool b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_per_conn_pool
new file mode 100644
index 00000000000..ec5b5ad61da
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diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_per_conn_pool_temp b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_per_conn_pool_temp
new file mode 100644
index 00000000000..2a957509cb3
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_per_conn_pool_temp
@@ -0,0 +1 @@
+ad827931562eee90e269d7c3336035b162c87f58
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_pool_sync_pool b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_pool_sync_pool
new file mode 100644
index 00000000000..4907931aaac
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/proto_buf_pool_sync_pool
@@ -0,0 +1 @@
+32e39cd08a7c834ae41340d85a31198f586cb227
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_benchmark b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_benchmark
new file mode 100644
index 00000000000..01dc4cfdb5e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_benchmark
@@ -0,0 +1 @@
+8b2b7cf0aff1935b5807ea9a54259eebc5ec71e7
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_server_two_goroutine b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_server_two_goroutine
new file mode 100644
index 00000000000..df9a11ab273
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/raw_tcp_server_two_goroutine
@@ -0,0 +1 @@
+3f2aba689b18b41f8dd49783d6e6d5b6a36b16ef
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_benchmark_allocs b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_benchmark_allocs
new file mode 100644
index 00000000000..17b5ad562b3
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_benchmark_allocs
@@ -0,0 +1 @@
+e14fb25450297fccc2615a9cf3d739a45371ce30
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_flush_two_client b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_flush_two_client
new file mode 100644
index 00000000000..31d9ed8e601
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_flush_two_client
@@ -0,0 +1 @@
+aa37cac826c1d9446c37f1b64d5f0967ef0fb247
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs
new file mode 100644
index 00000000000..47d16cfc2a0
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs
@@ -0,0 +1 @@
+aabb6bf80769573dd2fc4595c28e2ac31333a001
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf
new file mode 100644
index 00000000000..436d7a246f6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_msg_struct_allocs_with_proto_buf
@@ -0,0 +1 @@
+0a0fbbdd58a7ccf550e493c35a23bc732de40c01
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_options_allocs b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_options_allocs
new file mode 100644
index 00000000000..f9ef8ce37b6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_options_allocs
@@ -0,0 +1 @@
+1e32fde6c72b965149af31f5cf65d75fffe2fcd1
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_recv_message_cpu b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_recv_message_cpu
new file mode 100644
index 00000000000..1b34ccfb061
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_recv_message_cpu
@@ -0,0 +1 @@
+a5346e76c70bb5f83f97b63f44e2b14a0f3163f8
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem
new file mode 100644
index 00000000000..5270db603be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem
@@ -0,0 +1 @@
+782c6bb3312108f0fccb2268b741b1c90623eedf
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface
new file mode 100644
index 00000000000..19d81c4005d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_streaming_mem_alternative_codec_interface
@@ -0,0 +1 @@
+37efd24362ca70250de992e550b79c46d3655926
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_unary_mem b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_unary_mem
new file mode 100644
index 00000000000..0b56fe728cb
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/reduce_unary_mem
@@ -0,0 +1 @@
+dc1583197ea2821cd4cd5efe8c6a0e1ca178b6d2
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_alloc_in_transport_write b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_alloc_in_transport_write
new file mode 100644
index 00000000000..ce429593c00
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_alloc_in_transport_write
@@ -0,0 +1 @@
+0974ac30e1329d24677a145ecdeecb577519b004
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv
new file mode 100644
index 00000000000..bc46380261e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv
@@ -0,0 +1 @@
+cffd5df12c661643f26ccfaed5695e75951523dd
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf
new file mode 100644
index 00000000000..2b3a39245b1
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_buffer_recreation_in_recv_with_proto_buf
@@ -0,0 +1 @@
+33776479612e7a4b3853a8daaefc822e7a210e5d
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_defer_in_recv_msg_reader b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_defer_in_recv_msg_reader
new file mode 100644
index 00000000000..8d785d5d292
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_defer_in_recv_msg_reader
@@ -0,0 +1 @@
+dd0acfa3dd07840af8cc11c7413f5b58aa89bed2
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients
new file mode 100644
index 00000000000..397c74ff310
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_extra_goroutine_in_benchmark_clients
@@ -0,0 +1 @@
+388da4269c1a1dbfd5e550231a71f063c76215bd
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients
new file mode 100644
index 00000000000..8bbb8b1892e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_inner_goroutine_on_unary_calls_in_benchmark_clients
@@ -0,0 +1 @@
+866d750850529b9ccdd6abe476efde6529f7cf02
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message
new file mode 100644
index 00000000000..fe008e9b2da
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message
@@ -0,0 +1 @@
+74f62a8924be725d2aca703307b371a828ec37ef
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1 b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1
new file mode 100644
index 00000000000..c7a5a115930
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/remove_reader_in_recv_message_handle_large_message_take1
@@ -0,0 +1 @@
+429234b3c9659cc6617d20b13b2173f55beeb35e
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/repro_raw_tcp_latency_byte_buf b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/repro_raw_tcp_latency_byte_buf
new file mode 100644
index 00000000000..68963ba1fde
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/repro_raw_tcp_latency_byte_buf
@@ -0,0 +1 @@
+32cdf75ccb5b6a1e541407f81970eee941f9adbc
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_batching_on_reduce_streaming_mem b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_batching_on_reduce_streaming_mem
new file mode 100644
index 00000000000..9238f838757
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_batching_on_reduce_streaming_mem
@@ -0,0 +1 @@
+6dda5a14883d4e86c0383efab83e469f0c0b8910
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_defer_flush b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_defer_flush
new file mode 100644
index 00000000000..23e9c9c2222
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/retry_defer_flush
@@ -0,0 +1 @@
+606ec81560441f7b547a9d4b9ec45189e80812ff
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control
new file mode 100644
index 00000000000..80324086223
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control
@@ -0,0 +1 @@
+a1c45626cb3d71aa1192054499a34f7ef18f96dc
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control_master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control_master
new file mode 100644
index 00000000000..d63cdb5c0dc
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/revise_flow_control_master
@@ -0,0 +1 @@
+ca0352d20381732a898c9fb293b333c476f75f90
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/server_latencies b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/server_latencies
new file mode 100644
index 00000000000..42db859349e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/server_latencies
@@ -0,0 +1 @@
+fd3b2bf816b15c0e375722f88609c259ff612901
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/speedup_client_bm b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/speedup_client_bm
new file mode 100644
index 00000000000..d78436978d1
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/speedup_client_bm
@@ -0,0 +1 @@
+d49501022fb27d034308611e84fc703a7b2acfb3
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/suspect b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/suspect
new file mode 100644
index 00000000000..a2db5d9cd2e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/suspect
@@ -0,0 +1 @@
+33731fd06249935bcb9e46a187c82b042a087e36
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp
new file mode 100644
index 00000000000..c1edfab06ed
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp
@@ -0,0 +1 @@
+c92db2c889f2e7f5384298a459d283b843352563
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp2 b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp2
new file mode 100644
index 00000000000..cbf9086b05b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp2
@@ -0,0 +1 @@
+696f026dd856e361b8519726ee9de457fef8f657
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp_trial b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp_trial
new file mode 100644
index 00000000000..796e5f0c39b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/temp_trial
@@ -0,0 +1 @@
+3b1e088fa8852a7399c2c38c11420e4f0294f4cd
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/try_remove_goroutine_around_unary b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/try_remove_goroutine_around_unary
new file mode 100644
index 00000000000..94ebe74b00f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/try_remove_goroutine_around_unary
@@ -0,0 +1 @@
+148b46adb4b92b361d9f63b189eaa9c19090223d
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/update_go_readme b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/update_go_readme
new file mode 100644
index 00000000000..4e52d2ae2c4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/update_go_readme
@@ -0,0 +1 @@
+fd15d531bac01ec251fddc1d5cce0a803229d70a
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_buffer_for_proto_actual b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_buffer_for_proto_actual
new file mode 100644
index 00000000000..c37bbc7e699
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_buffer_for_proto_actual
@@ -0,0 +1 @@
+05d3f20468e48ccf5585486738e35095dd922f0f
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_cached_data_frames_on_framer b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_cached_data_frames_on_framer
new file mode 100644
index 00000000000..2882ae123df
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_cached_data_frames_on_framer
@@ -0,0 +1 @@
+d570bc359050a8c725aa0ad20b0e6a0099f66a74
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_proto_buffer_master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_proto_buffer_master
new file mode 100644
index 00000000000..7ed82a5dea1
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/use_proto_buffer_master
@@ -0,0 +1 @@
+4573a35c223d9b1679366c9fc1a543092b081a23
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/write_in_controller_queue b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/write_in_controller_queue
new file mode 100644
index 00000000000..a5df9efa14e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/apol/write_in_controller_queue
@@ -0,0 +1 @@
+4fa2854f8c9966251a88bc571bbc60a0a5b7f635
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/default_window_128mb b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/default_window_128mb
new file mode 100644
index 00000000000..6e5d3c94131
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/default_window_128mb
@@ -0,0 +1 @@
+25d5ab8f8e23edf5213ca9e7cdf5416d518f98d9
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/master
new file mode 100644
index 00000000000..93737a51871
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/master
@@ -0,0 +1 @@
+3cefdc3128f2ea2ef2475e7f8697ec1d98865999
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/v1.2.x b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/v1.2.x
new file mode 100644
index 00000000000..bec164c55a4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/glyc/v1.2.x
@@ -0,0 +1 @@
+cdee119ee21e61eef7093a41ba148fa83585e143
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/HEAD b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/HEAD
new file mode 100644
index 00000000000..6efe28fff83
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/HEAD
@@ -0,0 +1 @@
+ref: refs/remotes/origin/master
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/master b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/master
new file mode 100644
index 00000000000..5924cded86a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/master
@@ -0,0 +1 @@
+7fc29d0caa400efc53212b222356f99efe87d7d5
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/v1.2.x b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/v1.2.x
new file mode 100644
index 00000000000..bec164c55a4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/remotes/origin/v1.2.x
@@ -0,0 +1 @@
+cdee119ee21e61eef7093a41ba148fa83585e143
diff --git a/vendor/google.golang.org/grpc/dot.git/refs/tags/v1.2.0 b/vendor/google.golang.org/grpc/dot.git/refs/tags/v1.2.0
new file mode 100644
index 00000000000..bec164c55a4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/dot.git/refs/tags/v1.2.0
@@ -0,0 +1 @@
+cdee119ee21e61eef7093a41ba148fa83585e143
diff --git a/vendor/google.golang.org/grpc/examples/README.md b/vendor/google.golang.org/grpc/examples/README.md
new file mode 100644
index 00000000000..6ea6b35f62a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/README.md
@@ -0,0 +1,57 @@
+gRPC in 3 minutes (Go)
+======================
+
+BACKGROUND
+-------------
+For this sample, we've already generated the server and client stubs from [helloworld.proto](helloworld/helloworld/helloworld.proto).
+
+PREREQUISITES
+-------------
+
+- This requires Go 1.5 or later
+- Requires that [GOPATH is set](https://golang.org/doc/code.html#GOPATH)
+
+```
+$ go help gopath
+$ # ensure the PATH contains $GOPATH/bin
+$ export PATH=$PATH:$GOPATH/bin
+```
+
+INSTALL
+-------
+
+```
+$ go get -u google.golang.org/grpc/examples/helloworld/greeter_client
+$ go get -u google.golang.org/grpc/examples/helloworld/greeter_server
+```
+
+TRY IT!
+-------
+
+- Run the server
+
+```
+$ greeter_server &
+```
+
+- Run the client
+
+```
+$ greeter_client
+```
+
+OPTIONAL - Rebuilding the generated code
+----------------------------------------
+
+1 First [install protoc](https://github.com/google/protobuf/blob/master/README.md)
+  - For now, this needs to be installed from source
+  - This is will change once proto3 is officially released
+
+2 Install the protoc Go plugin.
+
+```
+$ go get -a github.com/golang/protobuf/protoc-gen-go
+$
+$ # from this dir; invoke protoc
+$  protoc -I ./helloworld/helloworld/ ./helloworld/helloworld/helloworld.proto --go_out=plugins=grpc:helloworld
+```
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/Makefile b/vendor/google.golang.org/grpc/examples/bigfile/Makefile
new file mode 100644
index 00000000000..cc686825ba0
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/Makefile
@@ -0,0 +1,3 @@
+all:
+	cd client && go build
+	cd server && go build
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/client/client b/vendor/google.golang.org/grpc/examples/bigfile/client/client
new file mode 100755
index 00000000000..342e1beeb75
Binary files /dev/null and b/vendor/google.golang.org/grpc/examples/bigfile/client/client differ
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/client/client.go b/vendor/google.golang.org/grpc/examples/bigfile/client/client.go
new file mode 100644
index 00000000000..58526989a66
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/client/client.go
@@ -0,0 +1,104 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"hash"
+	"time"
+
+	"github.com/glycerine/blake2b" // vendor https://github.com/dchest/blake2b"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	pb "google.golang.org/grpc/examples/bigfile/streambigfile"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	tls                = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
+	caFile             = flag.String("ca_file", "../testdata/ca.pem", "The file containning the CA root cert file")
+	serverAddr         = flag.String("server_addr", "127.0.0.1:10000", "The server address in the format of host:port")
+	serverHostOverride = flag.String("server_host_override", "x.test.youtube.com", "The server name use to verify the hostname returned by TLS handshake")
+)
+
+type client struct {
+	hasher hash.Hash
+}
+
+func newClient() *client {
+	h, err := blake2b.New(nil)
+	panicOn(err)
+	return &client{
+		hasher: h,
+	}
+}
+
+func (c *client) runSendFile(client pb.PeerClient, data []byte) {
+	// Create a random number of random points
+
+	stream, err := client.SendFile(context.Background())
+	if err != nil {
+		grpclog.Fatalf("%v.SendFile(_) = _, %v", client, err)
+	}
+	var nk pb.BigFileChunk
+	nk.Filepath = "hello"
+	nk.SizeInBytes = int64(len(data))
+	nk.SendTime = uint64(time.Now().UnixNano())
+	nk.Blake2B = blake2bOfBytes(data)
+	nk.Data = data
+
+	c.hasher.Write(nk.Data)
+
+	if err := stream.Send(&nk); err != nil {
+		grpclog.Fatalf("%v.Send(%v) = %v", stream, nk, err)
+	}
+
+	reply, err := stream.CloseAndRecv()
+	if err != nil {
+		grpclog.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
+	}
+	compared := bytes.Compare(reply.WholeFileBlake2B, []byte(c.hasher.Sum(nil)))
+	grpclog.Printf("Reply saw checksum: '%x' match: %v", reply.WholeFileBlake2B, compared == 0)
+}
+
+func main() {
+	flag.Parse()
+	var opts []grpc.DialOption
+	if *tls {
+		var sn string
+		if *serverHostOverride != "" {
+			sn = *serverHostOverride
+		}
+		var creds credentials.TransportCredentials
+		if *caFile != "" {
+			var err error
+			creds, err = credentials.NewClientTLSFromFile(*caFile, sn)
+			if err != nil {
+				grpclog.Fatalf("Failed to create TLS credentials %v", err)
+			}
+		} else {
+			creds = credentials.NewClientTLSFromCert(nil, sn)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+	conn, err := grpc.Dial(*serverAddr, opts...)
+	if err != nil {
+		grpclog.Fatalf("fail to dial: %v", err)
+	}
+	defer conn.Close()
+	client := pb.NewPeerClient(conn)
+
+	// SendFile
+	data := []byte("hello peer")
+	c := newClient()
+	c.runSendFile(client, data)
+}
+
+func blake2bOfBytes(by []byte) []byte {
+	h, err := blake2b.New(nil)
+	panicOn(err)
+	h.Write(by)
+	return []byte(h.Sum(nil))
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/client/vprint.go b/vendor/google.golang.org/grpc/examples/bigfile/client/vprint.go
new file mode 100644
index 00000000000..3590db96942
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/client/vprint.go
@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+func panicOn(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+// p is a shortcut for a call to fmt.Printf that implicitly starts
+// and ends its message with a newline.
+func p(format string, stuff ...interface{}) {
+	fmt.Printf("\n "+format+"\n", stuff...)
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/server/server b/vendor/google.golang.org/grpc/examples/bigfile/server/server
new file mode 100755
index 00000000000..891cee24e68
Binary files /dev/null and b/vendor/google.golang.org/grpc/examples/bigfile/server/server differ
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/server/server.go b/vendor/google.golang.org/grpc/examples/bigfile/server/server.go
new file mode 100644
index 00000000000..b74e156f82f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/server/server.go
@@ -0,0 +1,99 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"net"
+	"time"
+
+	"google.golang.org/grpc"
+
+	"github.com/glycerine/blake2b" // vendor https://github.com/dchest/blake2b"
+
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+
+	pb "google.golang.org/grpc/examples/bigfile/streambigfile"
+)
+
+var (
+	tls      = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
+	certFile = flag.String("cert_file", "../testdata/server1.pem", "The TLS cert file")
+	keyFile  = flag.String("key_file", "../testdata/server1.key", "The TLS key file")
+	port     = flag.Int("port", 10000, "The server port")
+)
+
+type peerServer struct {
+	chunks []*pb.BigFileChunk
+}
+
+// implement pb.PeerServer interface
+func (s *peerServer) SendFile(stream pb.Peer_SendFileServer) error {
+	p("SendFile starting!")
+	var chunkCount int64
+	path := ""
+	var bc int64
+
+	hasher, err := blake2b.New(nil)
+	panicOn(err)
+	var finalChecksum []byte
+
+	defer func() {
+		fmt.Printf("\n this server.SendFile() call got %v chunks, with "+
+			"final checksum '%x'\n", chunkCount, finalChecksum)
+	}()
+
+	for {
+		nk, err := stream.Recv()
+		if err == io.EOF {
+			finalChecksum = []byte(hasher.Sum(nil))
+			endTime := time.Now()
+			return stream.SendAndClose(&pb.BigFileAck{
+				Filepath:         path,
+				RecvTime:         uint64(endTime.UnixNano()),
+				WholeFileBlake2B: finalChecksum,
+			})
+		}
+		if err != nil {
+			return err
+		}
+		hasher.Write(nk.Data)
+
+		if path == "" {
+			path = nk.Filepath
+		}
+		bc += nk.SizeInBytes
+		if nk.SizeInBytes != int64(len(nk.Data)) {
+			return fmt.Errorf("%v == nk.SizeInBytes != int64(len(nk.Data)) == %v", nk.SizeInBytes, int64(len(nk.Data)))
+		}
+		chunkCount++
+		s.chunks = append(s.chunks, nk)
+	}
+	return nil
+}
+
+func newPeerServer() *peerServer {
+	s := new(peerServer)
+	return s
+}
+
+func main() {
+	flag.Parse()
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		grpclog.Fatalf("failed to listen: %v", err)
+	}
+	var opts []grpc.ServerOption
+	if *tls {
+		creds, err := credentials.NewServerTLSFromFile(*certFile, *keyFile)
+		if err != nil {
+			grpclog.Fatalf("Failed to generate credentials %v", err)
+		}
+		opts = []grpc.ServerOption{grpc.Creds(creds)}
+	}
+	grpcServer := grpc.NewServer(opts...)
+	pb.RegisterPeerServer(grpcServer, newPeerServer())
+	p("listening on %v", *port)
+	grpcServer.Serve(lis)
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/server/vprint.go b/vendor/google.golang.org/grpc/examples/bigfile/server/vprint.go
new file mode 100644
index 00000000000..3590db96942
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/server/vprint.go
@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+func panicOn(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+// p is a shortcut for a call to fmt.Printf that implicitly starts
+// and ends its message with a newline.
+func p(format string, stuff ...interface{}) {
+	fmt.Printf("\n "+format+"\n", stuff...)
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/Makefile b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/Makefile
new file mode 100644
index 00000000000..39a3ca2b12f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/Makefile
@@ -0,0 +1,7 @@
+all:
+	go get github.com/gogo/protobuf/proto
+	go get github.com/gogo/protobuf/jsonpb
+	go get github.com/gogo/protobuf/protoc-gen-gogo
+	go get github.com/gogo/protobuf/gogoproto
+	protoc --gofast_out=plugins=grpc:.  sbf.proto
+
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.pb.go b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.pb.go
new file mode 100644
index 00000000000..18a9292f546
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.pb.go
@@ -0,0 +1,951 @@
+// Code generated by protoc-gen-gogo.
+// source: sbf.proto
+// DO NOT EDIT!
+
+/*
+	Package streambigfile is a generated protocol buffer package.
+
+	It is generated from these files:
+		sbf.proto
+
+	It has these top-level messages:
+		BigFileChunk
+		BigFileAck
+*/
+package streambigfile
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+import io "io"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type BigFileChunk struct {
+	Filepath    string `protobuf:"bytes,1,opt,name=Filepath,json=filepath,proto3" json:"Filepath,omitempty"`
+	SizeInBytes int64  `protobuf:"varint,2,opt,name=SizeInBytes,json=sizeInBytes,proto3" json:"SizeInBytes,omitempty"`
+	SendTime    uint64 `protobuf:"fixed64,3,opt,name=SendTime,json=sendTime,proto3" json:"SendTime,omitempty"`
+	Blake2B     []byte `protobuf:"bytes,4,opt,name=Blake2b,json=blake2b,proto3" json:"Blake2b,omitempty"`
+	Data        []byte `protobuf:"bytes,5,opt,name=Data,json=data,proto3" json:"Data,omitempty"`
+	// It is not strictly
+	// necessary to chop the
+	// Data into chunks, but
+	// may be convenient to
+	// avoid excessive memory
+	// use.
+	//
+	// Fields Data and Blake2b represent
+	// just this chunk.
+	//
+	// ChunkCountMinus1 is the
+	// count of chunks, minus 1.
+	//
+	// For example, a value of 0
+	// in the ChunkCountMinus1
+	// field means that there is
+	// only one chunk.
+	//
+	// ChunkNumber will be 0 as
+	// well in this case.
+	//
+	ChunkCountMinus1 int64 `protobuf:"varint,6,opt,name=ChunkCountMinus1,json=chunkCountMinus1,proto3" json:"ChunkCountMinus1,omitempty"`
+	ChunkNumber      int64 `protobuf:"varint,7,opt,name=ChunkNumber,json=chunkNumber,proto3" json:"ChunkNumber,omitempty"`
+}
+
+func (m *BigFileChunk) Reset()                    { *m = BigFileChunk{} }
+func (m *BigFileChunk) String() string            { return proto.CompactTextString(m) }
+func (*BigFileChunk) ProtoMessage()               {}
+func (*BigFileChunk) Descriptor() ([]byte, []int) { return fileDescriptorSbf, []int{0} }
+
+func (m *BigFileChunk) GetFilepath() string {
+	if m != nil {
+		return m.Filepath
+	}
+	return ""
+}
+
+func (m *BigFileChunk) GetSizeInBytes() int64 {
+	if m != nil {
+		return m.SizeInBytes
+	}
+	return 0
+}
+
+func (m *BigFileChunk) GetSendTime() uint64 {
+	if m != nil {
+		return m.SendTime
+	}
+	return 0
+}
+
+func (m *BigFileChunk) GetBlake2B() []byte {
+	if m != nil {
+		return m.Blake2B
+	}
+	return nil
+}
+
+func (m *BigFileChunk) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
+func (m *BigFileChunk) GetChunkCountMinus1() int64 {
+	if m != nil {
+		return m.ChunkCountMinus1
+	}
+	return 0
+}
+
+func (m *BigFileChunk) GetChunkNumber() int64 {
+	if m != nil {
+		return m.ChunkNumber
+	}
+	return 0
+}
+
+type BigFileAck struct {
+	Filepath         string `protobuf:"bytes,1,opt,name=Filepath,json=filepath,proto3" json:"Filepath,omitempty"`
+	SizeInBytes      int64  `protobuf:"varint,2,opt,name=SizeInBytes,json=sizeInBytes,proto3" json:"SizeInBytes,omitempty"`
+	RecvTime         uint64 `protobuf:"fixed64,3,opt,name=RecvTime,json=recvTime,proto3" json:"RecvTime,omitempty"`
+	WholeFileBlake2B []byte `protobuf:"bytes,4,opt,name=WholeFileBlake2b,json=wholeFileBlake2b,proto3" json:"WholeFileBlake2b,omitempty"`
+}
+
+func (m *BigFileAck) Reset()                    { *m = BigFileAck{} }
+func (m *BigFileAck) String() string            { return proto.CompactTextString(m) }
+func (*BigFileAck) ProtoMessage()               {}
+func (*BigFileAck) Descriptor() ([]byte, []int) { return fileDescriptorSbf, []int{1} }
+
+func (m *BigFileAck) GetFilepath() string {
+	if m != nil {
+		return m.Filepath
+	}
+	return ""
+}
+
+func (m *BigFileAck) GetSizeInBytes() int64 {
+	if m != nil {
+		return m.SizeInBytes
+	}
+	return 0
+}
+
+func (m *BigFileAck) GetRecvTime() uint64 {
+	if m != nil {
+		return m.RecvTime
+	}
+	return 0
+}
+
+func (m *BigFileAck) GetWholeFileBlake2B() []byte {
+	if m != nil {
+		return m.WholeFileBlake2B
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*BigFileChunk)(nil), "streambigfile.BigFileChunk")
+	proto.RegisterType((*BigFileAck)(nil), "streambigfile.BigFileAck")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for Peer service
+
+type PeerClient interface {
+	SendFile(ctx context.Context, opts ...grpc.CallOption) (Peer_SendFileClient, error)
+}
+
+type peerClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewPeerClient(cc *grpc.ClientConn) PeerClient {
+	return &peerClient{cc}
+}
+
+func (c *peerClient) SendFile(ctx context.Context, opts ...grpc.CallOption) (Peer_SendFileClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_Peer_serviceDesc.Streams[0], c.cc, "/streambigfile.Peer/SendFile", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &peerSendFileClient{stream}
+	return x, nil
+}
+
+type Peer_SendFileClient interface {
+	Send(*BigFileChunk) error
+	CloseAndRecv() (*BigFileAck, error)
+	grpc.ClientStream
+}
+
+type peerSendFileClient struct {
+	grpc.ClientStream
+}
+
+func (x *peerSendFileClient) Send(m *BigFileChunk) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *peerSendFileClient) CloseAndRecv() (*BigFileAck, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(BigFileAck)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for Peer service
+
+type PeerServer interface {
+	SendFile(Peer_SendFileServer) error
+}
+
+func RegisterPeerServer(s *grpc.Server, srv PeerServer) {
+	s.RegisterService(&_Peer_serviceDesc, srv)
+}
+
+func _Peer_SendFile_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(PeerServer).SendFile(&peerSendFileServer{stream})
+}
+
+type Peer_SendFileServer interface {
+	SendAndClose(*BigFileAck) error
+	Recv() (*BigFileChunk, error)
+	grpc.ServerStream
+}
+
+type peerSendFileServer struct {
+	grpc.ServerStream
+}
+
+func (x *peerSendFileServer) SendAndClose(m *BigFileAck) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *peerSendFileServer) Recv() (*BigFileChunk, error) {
+	m := new(BigFileChunk)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _Peer_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "streambigfile.Peer",
+	HandlerType: (*PeerServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "SendFile",
+			Handler:       _Peer_SendFile_Handler,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "sbf.proto",
+}
+
+func (m *BigFileChunk) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *BigFileChunk) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.Filepath) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(len(m.Filepath)))
+		i += copy(dAtA[i:], m.Filepath)
+	}
+	if m.SizeInBytes != 0 {
+		dAtA[i] = 0x10
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(m.SizeInBytes))
+	}
+	if m.SendTime != 0 {
+		dAtA[i] = 0x19
+		i++
+		i = encodeFixed64Sbf(dAtA, i, uint64(m.SendTime))
+	}
+	if len(m.Blake2B) > 0 {
+		dAtA[i] = 0x22
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(len(m.Blake2B)))
+		i += copy(dAtA[i:], m.Blake2B)
+	}
+	if len(m.Data) > 0 {
+		dAtA[i] = 0x2a
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(len(m.Data)))
+		i += copy(dAtA[i:], m.Data)
+	}
+	if m.ChunkCountMinus1 != 0 {
+		dAtA[i] = 0x30
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(m.ChunkCountMinus1))
+	}
+	if m.ChunkNumber != 0 {
+		dAtA[i] = 0x38
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(m.ChunkNumber))
+	}
+	return i, nil
+}
+
+func (m *BigFileAck) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *BigFileAck) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.Filepath) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(len(m.Filepath)))
+		i += copy(dAtA[i:], m.Filepath)
+	}
+	if m.SizeInBytes != 0 {
+		dAtA[i] = 0x10
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(m.SizeInBytes))
+	}
+	if m.RecvTime != 0 {
+		dAtA[i] = 0x19
+		i++
+		i = encodeFixed64Sbf(dAtA, i, uint64(m.RecvTime))
+	}
+	if len(m.WholeFileBlake2B) > 0 {
+		dAtA[i] = 0x22
+		i++
+		i = encodeVarintSbf(dAtA, i, uint64(len(m.WholeFileBlake2B)))
+		i += copy(dAtA[i:], m.WholeFileBlake2B)
+	}
+	return i, nil
+}
+
+func encodeFixed64Sbf(dAtA []byte, offset int, v uint64) int {
+	dAtA[offset] = uint8(v)
+	dAtA[offset+1] = uint8(v >> 8)
+	dAtA[offset+2] = uint8(v >> 16)
+	dAtA[offset+3] = uint8(v >> 24)
+	dAtA[offset+4] = uint8(v >> 32)
+	dAtA[offset+5] = uint8(v >> 40)
+	dAtA[offset+6] = uint8(v >> 48)
+	dAtA[offset+7] = uint8(v >> 56)
+	return offset + 8
+}
+func encodeFixed32Sbf(dAtA []byte, offset int, v uint32) int {
+	dAtA[offset] = uint8(v)
+	dAtA[offset+1] = uint8(v >> 8)
+	dAtA[offset+2] = uint8(v >> 16)
+	dAtA[offset+3] = uint8(v >> 24)
+	return offset + 4
+}
+func encodeVarintSbf(dAtA []byte, offset int, v uint64) int {
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return offset + 1
+}
+func (m *BigFileChunk) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.Filepath)
+	if l > 0 {
+		n += 1 + l + sovSbf(uint64(l))
+	}
+	if m.SizeInBytes != 0 {
+		n += 1 + sovSbf(uint64(m.SizeInBytes))
+	}
+	if m.SendTime != 0 {
+		n += 9
+	}
+	l = len(m.Blake2B)
+	if l > 0 {
+		n += 1 + l + sovSbf(uint64(l))
+	}
+	l = len(m.Data)
+	if l > 0 {
+		n += 1 + l + sovSbf(uint64(l))
+	}
+	if m.ChunkCountMinus1 != 0 {
+		n += 1 + sovSbf(uint64(m.ChunkCountMinus1))
+	}
+	if m.ChunkNumber != 0 {
+		n += 1 + sovSbf(uint64(m.ChunkNumber))
+	}
+	return n
+}
+
+func (m *BigFileAck) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.Filepath)
+	if l > 0 {
+		n += 1 + l + sovSbf(uint64(l))
+	}
+	if m.SizeInBytes != 0 {
+		n += 1 + sovSbf(uint64(m.SizeInBytes))
+	}
+	if m.RecvTime != 0 {
+		n += 9
+	}
+	l = len(m.WholeFileBlake2B)
+	if l > 0 {
+		n += 1 + l + sovSbf(uint64(l))
+	}
+	return n
+}
+
+func sovSbf(x uint64) (n int) {
+	for {
+		n++
+		x >>= 7
+		if x == 0 {
+			break
+		}
+	}
+	return n
+}
+func sozSbf(x uint64) (n int) {
+	return sovSbf(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *BigFileChunk) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowSbf
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: BigFileChunk: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: BigFileChunk: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Filepath", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthSbf
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Filepath = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SizeInBytes", wireType)
+			}
+			m.SizeInBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.SizeInBytes |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 1 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SendTime", wireType)
+			}
+			m.SendTime = 0
+			if (iNdEx + 8) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += 8
+			m.SendTime = uint64(dAtA[iNdEx-8])
+			m.SendTime |= uint64(dAtA[iNdEx-7]) << 8
+			m.SendTime |= uint64(dAtA[iNdEx-6]) << 16
+			m.SendTime |= uint64(dAtA[iNdEx-5]) << 24
+			m.SendTime |= uint64(dAtA[iNdEx-4]) << 32
+			m.SendTime |= uint64(dAtA[iNdEx-3]) << 40
+			m.SendTime |= uint64(dAtA[iNdEx-2]) << 48
+			m.SendTime |= uint64(dAtA[iNdEx-1]) << 56
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Blake2B", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSbf
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Blake2B = append(m.Blake2B[:0], dAtA[iNdEx:postIndex]...)
+			if m.Blake2B == nil {
+				m.Blake2B = []byte{}
+			}
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Data", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSbf
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Data = append(m.Data[:0], dAtA[iNdEx:postIndex]...)
+			if m.Data == nil {
+				m.Data = []byte{}
+			}
+			iNdEx = postIndex
+		case 6:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChunkCountMinus1", wireType)
+			}
+			m.ChunkCountMinus1 = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.ChunkCountMinus1 |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 7:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChunkNumber", wireType)
+			}
+			m.ChunkNumber = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.ChunkNumber |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipSbf(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthSbf
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *BigFileAck) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowSbf
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: BigFileAck: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: BigFileAck: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Filepath", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthSbf
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Filepath = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SizeInBytes", wireType)
+			}
+			m.SizeInBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.SizeInBytes |= (int64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 1 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RecvTime", wireType)
+			}
+			m.RecvTime = 0
+			if (iNdEx + 8) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += 8
+			m.RecvTime = uint64(dAtA[iNdEx-8])
+			m.RecvTime |= uint64(dAtA[iNdEx-7]) << 8
+			m.RecvTime |= uint64(dAtA[iNdEx-6]) << 16
+			m.RecvTime |= uint64(dAtA[iNdEx-5]) << 24
+			m.RecvTime |= uint64(dAtA[iNdEx-4]) << 32
+			m.RecvTime |= uint64(dAtA[iNdEx-3]) << 40
+			m.RecvTime |= uint64(dAtA[iNdEx-2]) << 48
+			m.RecvTime |= uint64(dAtA[iNdEx-1]) << 56
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field WholeFileBlake2B", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSbf
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.WholeFileBlake2B = append(m.WholeFileBlake2B[:0], dAtA[iNdEx:postIndex]...)
+			if m.WholeFileBlake2B == nil {
+				m.WholeFileBlake2B = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipSbf(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthSbf
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipSbf(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowSbf
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+			return iNdEx, nil
+		case 1:
+			iNdEx += 8
+			return iNdEx, nil
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowSbf
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			iNdEx += length
+			if length < 0 {
+				return 0, ErrInvalidLengthSbf
+			}
+			return iNdEx, nil
+		case 3:
+			for {
+				var innerWire uint64
+				var start int = iNdEx
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return 0, ErrIntOverflowSbf
+					}
+					if iNdEx >= l {
+						return 0, io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					innerWire |= (uint64(b) & 0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				innerWireType := int(innerWire & 0x7)
+				if innerWireType == 4 {
+					break
+				}
+				next, err := skipSbf(dAtA[start:])
+				if err != nil {
+					return 0, err
+				}
+				iNdEx = start + next
+			}
+			return iNdEx, nil
+		case 4:
+			return iNdEx, nil
+		case 5:
+			iNdEx += 4
+			return iNdEx, nil
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+	}
+	panic("unreachable")
+}
+
+var (
+	ErrInvalidLengthSbf = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowSbf   = fmt.Errorf("proto: integer overflow")
+)
+
+func init() { proto.RegisterFile("sbf.proto", fileDescriptorSbf) }
+
+var fileDescriptorSbf = []byte{
+	// 308 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x91, 0xcb, 0x4a, 0xc3, 0x40,
+	0x18, 0x85, 0x3b, 0x36, 0xf6, 0x32, 0xad, 0x10, 0x66, 0x35, 0x56, 0x08, 0xa1, 0xab, 0xe0, 0xa2,
+	0x60, 0x7d, 0x82, 0xa6, 0x52, 0x70, 0x61, 0x91, 0x54, 0x70, 0x3d, 0x93, 0xfe, 0x69, 0x86, 0xdc,
+	0x4a, 0x66, 0xa2, 0xe8, 0x63, 0xb8, 0xf2, 0x91, 0x5c, 0xfa, 0x08, 0x12, 0x7d, 0x10, 0x99, 0x24,
+	0xd0, 0x0b, 0x2e, 0x5d, 0x9e, 0xef, 0x9f, 0xcb, 0x39, 0xff, 0xc1, 0x7d, 0xc9, 0x83, 0xc9, 0x36,
+	0xcf, 0x54, 0x46, 0xce, 0xa4, 0xca, 0x81, 0x25, 0x5c, 0x6c, 0x02, 0x11, 0xc3, 0xf8, 0x07, 0xe1,
+	0xa1, 0x2b, 0x36, 0x0b, 0x11, 0xc3, 0x3c, 0x2c, 0xd2, 0x88, 0x8c, 0x70, 0x4f, 0x8b, 0x2d, 0x53,
+	0x21, 0x45, 0x36, 0x72, 0xfa, 0x5e, 0x2f, 0x68, 0x34, 0xb1, 0xf1, 0x60, 0x25, 0x5e, 0xe1, 0x36,
+	0x75, 0x5f, 0x14, 0x48, 0x7a, 0x62, 0x23, 0xa7, 0xed, 0x0d, 0xe4, 0x0e, 0xe9, 0xdb, 0x2b, 0x48,
+	0xd7, 0x0f, 0x22, 0x01, 0xda, 0xb6, 0x91, 0xd3, 0xf1, 0x7a, 0xb2, 0xd1, 0x84, 0xe2, 0xae, 0x1b,
+	0xb3, 0x08, 0xa6, 0x9c, 0x1a, 0x36, 0x72, 0x86, 0x5e, 0x97, 0xd7, 0x92, 0x10, 0x6c, 0xdc, 0x30,
+	0xc5, 0xe8, 0x69, 0x85, 0x8d, 0x35, 0x53, 0x8c, 0x5c, 0x62, 0xb3, 0x32, 0x34, 0xcf, 0x8a, 0x54,
+	0xdd, 0x89, 0xb4, 0x90, 0x57, 0xb4, 0x53, 0x7d, 0x68, 0xfa, 0x47, 0x5c, 0xfb, 0xaa, 0xce, 0x2e,
+	0x8b, 0x84, 0x43, 0x4e, 0xbb, 0xb5, 0x2f, 0x7f, 0x87, 0xc6, 0x6f, 0x08, 0xe3, 0x26, 0xe6, 0xcc,
+	0xff, 0x87, 0x90, 0x1e, 0xf8, 0x4f, 0xfb, 0x21, 0xf3, 0x46, 0x6b, 0xdb, 0x8f, 0x61, 0x16, 0x83,
+	0x7e, 0xfe, 0x30, 0xad, 0xf9, 0x7c, 0xc4, 0xa7, 0x4b, 0x6c, 0xdc, 0x03, 0xe4, 0x64, 0x51, 0x2f,
+	0x4d, 0x8f, 0xc8, 0xc5, 0xe4, 0xa0, 0x9f, 0xc9, 0x7e, 0x37, 0xa3, 0xf3, 0xbf, 0x87, 0x33, 0x3f,
+	0x1a, 0xb7, 0x1c, 0xe4, 0x9a, 0x1f, 0xa5, 0x85, 0x3e, 0x4b, 0x0b, 0x7d, 0x95, 0x16, 0x7a, 0xff,
+	0xb6, 0x5a, 0xbc, 0x53, 0x75, 0x7e, 0xfd, 0x1b, 0x00, 0x00, 0xff, 0xff, 0x70, 0x48, 0xb7, 0x3e,
+	0x00, 0x02, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.proto b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.proto
new file mode 100644
index 00000000000..65e595fa83c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/streambigfile/sbf.proto
@@ -0,0 +1,47 @@
+syntax = "proto3";
+package streambigfile;
+
+message BigFileChunk {
+	string  Filepath    = 1;
+	int64   SizeInBytes = 2;
+	fixed64 SendTime    = 3;
+	bytes   Blake2b     = 4;
+    bytes	Data        = 5;
+
+    // It is not strictly
+    // necessary to chop the
+    // Data into chunks, but
+    // may be convenient to
+    // avoid excessive memory
+    // use.
+    // 
+    // Fields Data and Blake2b represent
+    // just this chunk.
+    //
+    // ChunkCountMinus1 is the
+    // count of chunks, minus 1.
+    //
+    // For example, a value of 0
+    // in the ChunkCountMinus1
+    // field means that there is
+    // only one chunk.
+    //
+    // ChunkNumber will be 0 as
+    // well in this case.
+    //
+    int64   ChunkCountMinus1 = 6;
+    int64   ChunkNumber      = 7;
+}
+
+message BigFileAck {
+	string  Filepath    = 1;
+	int64   SizeInBytes = 2;
+	fixed64 RecvTime    = 3;
+	bytes   WholeFileBlake2b     = 4;
+}
+
+service Peer {
+
+  rpc SendFile(stream BigFileChunk) returns (BigFileAck) {}
+
+}
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/testdata/ca.pem b/vendor/google.golang.org/grpc/examples/bigfile/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----
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+Dfcog5wrJytaQ6UA0wE=
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/testdata/route_guide_db.json b/vendor/google.golang.org/grpc/examples/bigfile/testdata/route_guide_db.json
new file mode 100644
index 00000000000..9d6a980ab7d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/testdata/route_guide_db.json
@@ -0,0 +1,601 @@
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diff --git a/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.key b/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.pem b/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/bigfile/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/examples/gotutorial.md b/vendor/google.golang.org/grpc/examples/gotutorial.md
new file mode 100644
index 00000000000..6770b52d595
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/gotutorial.md
@@ -0,0 +1,431 @@
+#gRPC Basics: Go
+
+This tutorial provides a basic Go programmer's introduction to working with gRPC. By walking through this example you'll learn how to:
+
+- Define a service in a .proto file.
+- Generate server and client code using the protocol buffer compiler.
+- Use the Go gRPC API to write a simple client and server for your service.
+
+It assumes that you have read the [Getting started](https://github.com/grpc/grpc/tree/master/examples) guide and are familiar with [protocol buffers] (https://developers.google.com/protocol-buffers/docs/overview). Note that the example in this tutorial uses the proto3 version of the protocol buffers language, which is currently in alpha release:you can find out more in the [proto3 language guide](https://developers.google.com/protocol-buffers/docs/proto3) and see the [release notes](https://github.com/google/protobuf/releases) for the new version in the protocol buffers Github repository.
+
+This isn't a comprehensive guide to using gRPC in Go: more reference documentation is coming soon.
+
+## Why use gRPC?
+
+Our example is a simple route mapping application that lets clients get information about features on their route, create a summary of their route, and exchange route information such as traffic updates with the server and other clients.
+
+With gRPC we can define our service once in a .proto file and implement clients and servers in any of gRPC's supported languages, which in turn can be run in environments ranging from servers inside Google to your own tablet - all the complexity of communication between different languages and environments is handled for you by gRPC. We also get all the advantages of working with protocol buffers, including efficient serialization, a simple IDL, and easy interface updating.
+
+## Example code and setup
+
+The example code for our tutorial is in [grpc/grpc-go/examples/route_guide](https://github.com/grpc/grpc-go/tree/master/examples/route_guide). To download the example, clone the `grpc-go` repository by running the following command:
+```shell
+$ go get google.golang.org/grpc
+```
+
+Then change your current directory to `grpc-go/examples/route_guide`:
+```shell
+$ cd $GOPATH/src/google.golang.org/grpc/examples/route_guide
+```
+
+You also should have the relevant tools installed to generate the server and client interface code - if you don't already, follow the setup instructions in [the Go quick start guide](https://github.com/grpc/grpc-go/tree/master/examples/).
+
+
+## Defining the service
+
+Our first step (as you'll know from the [quick start](http://www.grpc.io/docs/#quick-start)) is to define the gRPC *service* and the method *request* and *response* types using [protocol buffers](https://developers.google.com/protocol-buffers/docs/overview). You can see the complete .proto file in [examples/route_guide/routeguide/route_guide.proto](https://github.com/grpc/grpc-go/tree/master/examples/route_guide/routeguide/route_guide.proto).
+
+To define a service, you specify a named `service` in your .proto file:
+
+```proto
+service RouteGuide {
+   ...
+}
+```
+
+Then you define `rpc` methods inside your service definition, specifying their request and response types. gRPC lets you define four kinds of service method, all of which are used in the `RouteGuide` service:
+
+- A *simple RPC* where the client sends a request to the server using the stub and waits for a response to come back, just like a normal function call.
+```proto
+   // Obtains the feature at a given position.
+   rpc GetFeature(Point) returns (Feature) {}
+```
+
+- A *server-side streaming RPC* where the client sends a request to the server and gets a stream to read a sequence of messages back. The client reads from the returned stream until there are no more messages. As you can see in our example, you specify a server-side streaming method by placing the `stream` keyword before the *response* type.
+```proto
+  // Obtains the Features available within the given Rectangle.  Results are
+  // streamed rather than returned at once (e.g. in a response message with a
+  // repeated field), as the rectangle may cover a large area and contain a
+  // huge number of features.
+  rpc ListFeatures(Rectangle) returns (stream Feature) {}
+```
+
+- A *client-side streaming RPC* where the client writes a sequence of messages and sends them to the server, again using a provided stream. Once the client has finished writing the messages, it waits for the server to read them all and return its response. You specify a client-side streaming method by placing the `stream` keyword before the *request* type.
+```proto
+  // Accepts a stream of Points on a route being traversed, returning a
+  // RouteSummary when traversal is completed.
+  rpc RecordRoute(stream Point) returns (RouteSummary) {}
+```
+
+- A *bidirectional streaming RPC* where both sides send a sequence of messages using a read-write stream. The two streams operate independently, so clients and servers can read and write in whatever order they like: for example, the server could wait to receive all the client messages before writing its responses, or it could alternately read a message then write a message, or some other combination of reads and writes. The order of messages in each stream is preserved. You specify this type of method by placing the `stream` keyword before both the request and the response.
+```proto
+  // Accepts a stream of RouteNotes sent while a route is being traversed,
+  // while receiving other RouteNotes (e.g. from other users).
+  rpc RouteChat(stream RouteNote) returns (stream RouteNote) {}
+```
+
+Our .proto file also contains protocol buffer message type definitions for all the request and response types used in our service methods - for example, here's the `Point` message type:
+```proto
+// Points are represented as latitude-longitude pairs in the E7 representation
+// (degrees multiplied by 10**7 and rounded to the nearest integer).
+// Latitudes should be in the range +/- 90 degrees and longitude should be in
+// the range +/- 180 degrees (inclusive).
+message Point {
+  int32 latitude = 1;
+  int32 longitude = 2;
+}
+```
+
+
+## Generating client and server code
+
+Next we need to generate the gRPC client and server interfaces from our .proto service definition. We do this using the protocol buffer compiler `protoc` with a special gRPC Go plugin.
+
+For simplicity, we've provided a [bash script](https://github.com/grpc/grpc-go/blob/master/codegen.sh) that runs `protoc` for you with the appropriate plugin, input, and output (if you want to run this by yourself, make sure you've installed protoc and followed the gRPC-Go [installation instructions](https://github.com/grpc/grpc-go/blob/master/README.md) first):
+
+```shell
+$ codegen.sh route_guide.proto
+```
+
+which actually runs:
+
+```shell
+$ protoc --go_out=plugins=grpc:. route_guide.proto
+```
+
+Running this command generates the following file in your current directory:
+- `route_guide.pb.go`
+
+This contains:
+- All the protocol buffer code to populate, serialize, and retrieve our request and response message types
+- An interface type (or *stub*) for clients to call with the methods defined in the `RouteGuide` service.
+- An interface type for servers to implement, also with the methods defined in the `RouteGuide` service.
+
+
+<a name="server"></a>
+## Creating the server
+
+First let's look at how we create a `RouteGuide` server. If you're only interested in creating gRPC clients, you can skip this section and go straight to [Creating the client](#client) (though you might find it interesting anyway!).
+
+There are two parts to making our `RouteGuide` service do its job:
+- Implementing the service interface generated from our service definition: doing the actual "work" of our service.
+- Running a gRPC server to listen for requests from clients and dispatch them to the right service implementation.
+
+You can find our example `RouteGuide` server in [grpc-go/examples/route_guide/server/server.go](https://github.com/grpc/grpc-go/tree/master/examples/route_guide/server/server.go). Let's take a closer look at how it works.
+
+### Implementing RouteGuide
+
+As you can see, our server has a `routeGuideServer` struct type that implements the generated `RouteGuideServer` interface:
+
+```go
+type routeGuideServer struct {
+        ...
+}
+...
+
+func (s *routeGuideServer) GetFeature(ctx context.Context, point *pb.Point) (*pb.Feature, error) {
+        ...
+}
+...
+
+func (s *routeGuideServer) ListFeatures(rect *pb.Rectangle, stream pb.RouteGuide_ListFeaturesServer) error {
+        ...
+}
+...
+
+func (s *routeGuideServer) RecordRoute(stream pb.RouteGuide_RecordRouteServer) error {
+        ...
+}
+...
+
+func (s *routeGuideServer) RouteChat(stream pb.RouteGuide_RouteChatServer) error {
+        ...
+}
+...
+```
+
+#### Simple RPC
+`routeGuideServer` implements all our service methods. Let's look at the simplest type first, `GetFeature`, which just gets a `Point` from the client and returns the corresponding feature information from its database in a `Feature`.
+
+```go
+func (s *routeGuideServer) GetFeature(ctx context.Context, point *pb.Point) (*pb.Feature, error) {
+	for _, feature := range s.savedFeatures {
+		if proto.Equal(feature.Location, point) {
+			return feature, nil
+		}
+	}
+	// No feature was found, return an unnamed feature
+	return &pb.Feature{"", point}, nil
+}
+```
+
+The method is passed a context object for the RPC and the client's `Point` protocol buffer request. It returns a `Feature` protocol buffer object with the response information and an `error`. In the method we populate the `Feature` with the appropriate information, and then `return` it along with an `nil` error to tell gRPC that we've finished dealing with the RPC and that the `Feature` can be returned to the client.
+
+#### Server-side streaming RPC
+Now let's look at one of our streaming RPCs. `ListFeatures` is a server-side streaming RPC, so we need to send back multiple `Feature`s to our client.
+
+```go
+func (s *routeGuideServer) ListFeatures(rect *pb.Rectangle, stream pb.RouteGuide_ListFeaturesServer) error {
+	for _, feature := range s.savedFeatures {
+		if inRange(feature.Location, rect) {
+			if err := stream.Send(feature); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+```
+
+As you can see, instead of getting simple request and response objects in our method parameters, this time we get a request object (the `Rectangle` in which our client wants to find `Feature`s) and a special `RouteGuide_ListFeaturesServer` object to write our responses.
+
+In the method, we populate as many `Feature` objects as we need to return, writing them to the `RouteGuide_ListFeaturesServer` using its `Send()` method. Finally, as in our simple RPC, we return a `nil` error to tell gRPC that we've finished writing responses. Should any error happen in this call, we return a non-`nil` error; the gRPC layer will translate it into an appropriate RPC status to be sent on the wire.
+
+#### Client-side streaming RPC
+Now let's look at something a little more complicated: the client-side streaming method `RecordRoute`, where we get a stream of `Point`s from the client and return a single `RouteSummary` with information about their trip. As you can see, this time the method doesn't have a request parameter at all. Instead, it gets a `RouteGuide_RecordRouteServer` stream, which the server can use to both read *and* write messages - it can receive client messages using its `Recv()` method and return its single response using its `SendAndClose()` method.
+
+```go
+func (s *routeGuideServer) RecordRoute(stream pb.RouteGuide_RecordRouteServer) error {
+	var pointCount, featureCount, distance int32
+	var lastPoint *pb.Point
+	startTime := time.Now()
+	for {
+		point, err := stream.Recv()
+		if err == io.EOF {
+			endTime := time.Now()
+			return stream.SendAndClose(&pb.RouteSummary{
+				PointCount:   pointCount,
+				FeatureCount: featureCount,
+				Distance:     distance,
+				ElapsedTime:  int32(endTime.Sub(startTime).Seconds()),
+			})
+		}
+		if err != nil {
+			return err
+		}
+		pointCount++
+		for _, feature := range s.savedFeatures {
+			if proto.Equal(feature.Location, point) {
+				featureCount++
+			}
+		}
+		if lastPoint != nil {
+			distance += calcDistance(lastPoint, point)
+		}
+		lastPoint = point
+	}
+}
+```
+
+In the method body we use the `RouteGuide_RecordRouteServer`s `Recv()` method to repeatedly read in our client's requests to a request object (in this case a `Point`) until there are no more messages: the server needs to check the the error returned from `Recv()` after each call. If this is `nil`, the stream is still good and it can continue reading; if it's `io.EOF` the message stream has ended and the server can return its `RouteSummary`. If it has any other value, we return the error "as is" so that it'll be translated to an RPC status by the gRPC layer.
+
+#### Bidirectional streaming RPC
+Finally, let's look at our bidirectional streaming RPC `RouteChat()`.
+
+```go
+func (s *routeGuideServer) RouteChat(stream pb.RouteGuide_RouteChatServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		key := serialize(in.Location)
+                ... // look for notes to be sent to client
+		for _, note := range s.routeNotes[key] {
+			if err := stream.Send(note); err != nil {
+				return err
+			}
+		}
+	}
+}
+```
+
+This time we get a `RouteGuide_RouteChatServer` stream that, as in our client-side streaming example, can be used to read and write messages. However, this time we return values via our method's stream while the client is still writing messages to *their* message stream.
+
+The syntax for reading and writing here is very similar to our client-streaming method, except the server uses the stream's `Send()` method rather than `SendAndClose()` because it's writing multiple responses. Although each side will always get the other's messages in the order they were written, both the client and server can read and write in any order — the streams operate completely independently.
+
+### Starting the server
+
+Once we've implemented all our methods, we also need to start up a gRPC server so that clients can actually use our service. The following snippet shows how we do this for our `RouteGuide` service:
+
+```go
+flag.Parse()
+lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+if err != nil {
+        log.Fatalf("failed to listen: %v", err)
+}
+grpcServer := grpc.NewServer()
+pb.RegisterRouteGuideServer(grpcServer, &routeGuideServer{})
+... // determine whether to use TLS
+grpcServer.Serve(lis)
+```
+To build and start a server, we:
+
+1. Specify the port we want to use to listen for client requests using `lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))`.
+2. Create an instance of the gRPC server using `grpc.NewServer()`.
+3. Register our service implementation with the gRPC server.
+4. Call `Serve()` on the server with our port details to do a blocking wait until the process is killed or `Stop()` is called.
+
+<a name="client"></a>
+## Creating the client
+
+In this section, we'll look at creating a Go client for our `RouteGuide` service. You can see our complete example client code in [grpc-go/examples/route_guide/client/client.go](https://github.com/grpc/grpc-go/tree/master/examples/route_guide/client/client.go).
+
+### Creating a stub
+
+To call service methods, we first need to create a gRPC *channel* to communicate with the server. We create this by passing the server address and port number to `grpc.Dial()` as follows:
+
+```go
+conn, err := grpc.Dial(*serverAddr)
+if err != nil {
+    ...
+}
+defer conn.Close()
+```
+
+You can use `DialOptions` to set the auth credentials (e.g., TLS, GCE credentials, JWT credentials) in `grpc.Dial` if the service you request requires that - however, we don't need to do this for our `RouteGuide` service.
+
+Once the gRPC *channel* is setup, we need a client *stub* to perform RPCs. We get this using the `NewRouteGuideClient` method provided in the `pb` package we generated from our .proto.
+
+```go
+client := pb.NewRouteGuideClient(conn)
+```
+
+### Calling service methods
+
+Now let's look at how we call our service methods. Note that in gRPC-Go, RPCs operate in a blocking/synchronous mode, which means that the RPC call waits for the server to respond, and will either return a response or an error.
+
+#### Simple RPC
+
+Calling the simple RPC `GetFeature` is nearly as straightforward as calling a local method.
+
+```go
+feature, err := client.GetFeature(context.Background(), &pb.Point{409146138, -746188906})
+if err != nil {
+        ...
+}
+```
+
+As you can see, we call the method on the stub we got earlier. In our method parameters we create and populate a request protocol buffer object (in our case `Point`). We also pass a `context.Context` object which lets us change our RPC's behaviour if necessary, such as time-out/cancel an RPC in flight. If the call doesn't return an error, then we can read the response information from the server from the first return value.
+
+```go
+log.Println(feature)
+```
+
+#### Server-side streaming RPC
+
+Here's where we call the server-side streaming method `ListFeatures`, which returns a stream of geographical `Feature`s. If you've already read [Creating the server](#server) some of this may look very familiar - streaming RPCs are implemented in a similar way on both sides.
+
+```go
+rect := &pb.Rectangle{ ... }  // initialize a pb.Rectangle
+stream, err := client.ListFeatures(context.Background(), rect)
+if err != nil {
+    ...
+}
+for {
+    feature, err := stream.Recv()
+    if err == io.EOF {
+        break
+    }
+    if err != nil {
+        log.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
+    }
+    log.Println(feature)
+}
+```
+
+As in the simple RPC, we pass the method a context and a request. However, instead of getting a response object back, we get back an instance of `RouteGuide_ListFeaturesClient`. The client can use the `RouteGuide_ListFeaturesClient` stream to read the server's responses.
+
+We use the `RouteGuide_ListFeaturesClient`'s `Recv()` method to repeatedly read in the server's responses to a response protocol buffer object (in this case a `Feature`) until there are no more messages: the client needs to check the error `err` returned from `Recv()` after each call. If `nil`, the stream is still good and it can continue reading; if it's `io.EOF` then the message stream has ended; otherwise there must be an RPC error, which is passed over through `err`.
+
+#### Client-side streaming RPC
+
+The client-side streaming method `RecordRoute` is similar to the server-side method, except that we only pass the method a context and get a `RouteGuide_RecordRouteClient` stream back, which we can use to both write *and* read messages.
+
+```go
+// Create a random number of random points
+r := rand.New(rand.NewSource(time.Now().UnixNano()))
+pointCount := int(r.Int31n(100)) + 2 // Traverse at least two points
+var points []*pb.Point
+for i := 0; i < pointCount; i++ {
+	points = append(points, randomPoint(r))
+}
+log.Printf("Traversing %d points.", len(points))
+stream, err := client.RecordRoute(context.Background())
+if err != nil {
+	log.Fatalf("%v.RecordRoute(_) = _, %v", client, err)
+}
+for _, point := range points {
+	if err := stream.Send(point); err != nil {
+		log.Fatalf("%v.Send(%v) = %v", stream, point, err)
+	}
+}
+reply, err := stream.CloseAndRecv()
+if err != nil {
+	log.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
+}
+log.Printf("Route summary: %v", reply)
+```
+
+The `RouteGuide_RecordRouteClient` has a `Send()` method that we can use to send requests to the server. Once we've finished writing our client's requests to the stream using `Send()`, we need to call `CloseAndRecv()` on the stream to let gRPC know that we've finished writing and are expecting to receive a response. We get our RPC status from the `err` returned from `CloseAndRecv()`. If the status is `nil`, then the first return value from `CloseAndRecv()` will be a valid server response.
+
+#### Bidirectional streaming RPC
+
+Finally, let's look at our bidirectional streaming RPC `RouteChat()`. As in the case of `RecordRoute`, we only pass the method a context object and get back a stream that we can use to both write and read messages. However, this time we return values via our method's stream while the server is still writing messages to *their* message stream.
+
+```go
+stream, err := client.RouteChat(context.Background())
+waitc := make(chan struct{})
+go func() {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			close(waitc)
+			return
+		}
+		if err != nil {
+			log.Fatalf("Failed to receive a note : %v", err)
+		}
+		log.Printf("Got message %s at point(%d, %d)", in.Message, in.Location.Latitude, in.Location.Longitude)
+	}
+}()
+for _, note := range notes {
+	if err := stream.Send(note); err != nil {
+		log.Fatalf("Failed to send a note: %v", err)
+	}
+}
+stream.CloseSend()
+<-waitc
+```
+
+The syntax for reading and writing here is very similar to our client-side streaming method, except we use the stream's `CloseSend()` method once we've finished our call. Although each side will always get the other's messages in the order they were written, both the client and server can read and write in any order — the streams operate completely independently.
+
+## Try it out!
+
+To compile and run the server, assuming you are in the folder
+`$GOPATH/src/google.golang.org/grpc/examples/route_guide`, simply:
+
+```sh
+$ go run server/server.go
+```
+
+Likewise, to run the client:
+
+```sh
+$ go run client/client.go
+```
+
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/greeter_client b/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/greeter_client
new file mode 100755
index 00000000000..50a0a817440
Binary files /dev/null and b/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/greeter_client differ
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/main.go b/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/main.go
new file mode 100644
index 00000000000..a451c99dc92
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/greeter_client/main.go
@@ -0,0 +1,69 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"log"
+	"os"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+const (
+	address     = "localhost:50051"
+	defaultName = "world"
+)
+
+func main() {
+	// Set up a connection to the server.
+	conn, err := grpc.Dial(address, grpc.WithInsecure())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	c := pb.NewGreeterClient(conn)
+
+	// Contact the server and print out its response.
+	name := defaultName
+	if len(os.Args) > 1 {
+		name = os.Args[1]
+	}
+	r, err := c.SayHello(context.Background(), &pb.HelloRequest{Name: name})
+	if err != nil {
+		log.Fatalf("could not greet: %v", err)
+	}
+	log.Printf("Greeting: %s", r.Message)
+}
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/greeter_server b/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/greeter_server
new file mode 100755
index 00000000000..b9c0e3eb42c
Binary files /dev/null and b/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/greeter_server differ
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/main.go b/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/main.go
new file mode 100644
index 00000000000..162cf908010
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/greeter_server/main.go
@@ -0,0 +1,70 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"log"
+	"net"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+	"google.golang.org/grpc/reflection"
+)
+
+const (
+	port = ":50051"
+)
+
+// server is used to implement helloworld.GreeterServer.
+type server struct{}
+
+// SayHello implements helloworld.GreeterServer
+func (s *server) SayHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
+	return &pb.HelloReply{Message: "Hello " + in.Name}, nil
+}
+
+func main() {
+	lis, err := net.Listen("tcp", port)
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterGreeterServer(s, &server{})
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.pb.go b/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.pb.go
new file mode 100644
index 00000000000..c8c8942a12f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.pb.go
@@ -0,0 +1,151 @@
+// Code generated by protoc-gen-go.
+// source: helloworld.proto
+// DO NOT EDIT!
+
+/*
+Package helloworld is a generated protocol buffer package.
+
+It is generated from these files:
+	helloworld.proto
+
+It has these top-level messages:
+	HelloRequest
+	HelloReply
+*/
+package helloworld
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The request message containing the user's name.
+type HelloRequest struct {
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+}
+
+func (m *HelloRequest) Reset()                    { *m = HelloRequest{} }
+func (m *HelloRequest) String() string            { return proto.CompactTextString(m) }
+func (*HelloRequest) ProtoMessage()               {}
+func (*HelloRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// The response message containing the greetings
+type HelloReply struct {
+	Message string `protobuf:"bytes,1,opt,name=message" json:"message,omitempty"`
+}
+
+func (m *HelloReply) Reset()                    { *m = HelloReply{} }
+func (m *HelloReply) String() string            { return proto.CompactTextString(m) }
+func (*HelloReply) ProtoMessage()               {}
+func (*HelloReply) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func init() {
+	proto.RegisterType((*HelloRequest)(nil), "helloworld.HelloRequest")
+	proto.RegisterType((*HelloReply)(nil), "helloworld.HelloReply")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for Greeter service
+
+type GreeterClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error)
+}
+
+type greeterClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewGreeterClient(cc *grpc.ClientConn) GreeterClient {
+	return &greeterClient{cc}
+}
+
+func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
+	out := new(HelloReply)
+	err := grpc.Invoke(ctx, "/helloworld.Greeter/SayHello", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Greeter service
+
+type GreeterServer interface {
+	// Sends a greeting
+	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+}
+
+func RegisterGreeterServer(s *grpc.Server, srv GreeterServer) {
+	s.RegisterService(&_Greeter_serviceDesc, srv)
+}
+
+func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HelloRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GreeterServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/helloworld.Greeter/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Greeter_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.Greeter",
+	HandlerType: (*GreeterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SayHello",
+			Handler:    _Greeter_SayHello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "helloworld.proto",
+}
+
+func init() { proto.RegisterFile("helloworld.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 174 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0x12, 0xc8, 0x48, 0xcd, 0xc9,
+	0xc9, 0x2f, 0xcf, 0x2f, 0xca, 0x49, 0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x42, 0x88,
+	0x28, 0x29, 0x71, 0xf1, 0x78, 0x80, 0x78, 0x41, 0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x42,
+	0x5c, 0x2c, 0x79, 0x89, 0xb9, 0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x41, 0x60, 0xb6, 0x92,
+	0x1a, 0x17, 0x17, 0x54, 0x4d, 0x41, 0x4e, 0xa5, 0x90, 0x04, 0x17, 0x7b, 0x6e, 0x6a, 0x71, 0x71,
+	0x62, 0x3a, 0x4c, 0x11, 0x8c, 0x6b, 0xe4, 0xc9, 0xc5, 0xee, 0x5e, 0x94, 0x9a, 0x5a, 0x92, 0x5a,
+	0x24, 0x64, 0xc7, 0xc5, 0x11, 0x9c, 0x58, 0x09, 0xd6, 0x25, 0x24, 0xa1, 0x87, 0xe4, 0x02, 0x64,
+	0xcb, 0xa4, 0xc4, 0xb0, 0xc8, 0x00, 0xad, 0x50, 0x62, 0x70, 0x32, 0xe0, 0x92, 0xce, 0xcc, 0xd7,
+	0x4b, 0x2f, 0x2a, 0x48, 0xd6, 0x4b, 0xad, 0x48, 0xcc, 0x2d, 0xc8, 0x49, 0x2d, 0x46, 0x52, 0xeb,
+	0xc4, 0x0f, 0x56, 0x1c, 0x0e, 0x62, 0x07, 0x80, 0xbc, 0x14, 0xc0, 0x98, 0xc4, 0x06, 0xf6, 0x9b,
+	0x31, 0x20, 0x00, 0x00, 0xff, 0xff, 0x0f, 0xb7, 0xcd, 0xf2, 0xef, 0x00, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.proto b/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.proto
new file mode 100644
index 00000000000..c3ddd4aee77
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/helloworld/helloworld.proto
@@ -0,0 +1,52 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "io.grpc.examples.helloworld";
+option java_outer_classname = "HelloWorldProto";
+
+package helloworld;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings
+message HelloReply {
+  string message = 1;
+}
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/mock/hw_test.go b/vendor/google.golang.org/grpc/examples/helloworld/mock/hw_test.go
new file mode 100644
index 00000000000..b63fec7ad63
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/mock/hw_test.go
@@ -0,0 +1,49 @@
+package mock_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	helloworld "google.golang.org/grpc/examples/helloworld/helloworld"
+	hwmock "google.golang.org/grpc/examples/helloworld/mock/mock_helloworld"
+)
+
+// rpcMsg implements the gomock.Matcher interface
+type rpcMsg struct {
+	msg proto.Message
+}
+
+func (r *rpcMsg) Matches(msg interface{}) bool {
+	m, ok := msg.(proto.Message)
+	if !ok {
+		return false
+	}
+	return proto.Equal(m, r.msg)
+}
+
+func (r *rpcMsg) String() string {
+	return fmt.Sprintf("is %s", r.msg)
+}
+
+func TestSayHello(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	mockGreeterClient := hwmock.NewMockGreeterClient(ctrl)
+	req := &helloworld.HelloRequest{Name: "unit_test"}
+	mockGreeterClient.EXPECT().SayHello(
+		gomock.Any(),
+		&rpcMsg{msg: req},
+	).Return(&helloworld.HelloReply{Message: "Mocked Interface"}, nil)
+	testSayHello(t, mockGreeterClient)
+}
+
+func testSayHello(t *testing.T, client helloworld.GreeterClient) {
+	r, err := client.SayHello(context.Background(), &helloworld.HelloRequest{Name: "unit_test"})
+	if err != nil || r.Message != "Mocked Interface" {
+		t.Errorf("mocking failed")
+	}
+	t.Log("Reply : ", r.Message)
+}
diff --git a/vendor/google.golang.org/grpc/examples/helloworld/mock/mock_helloworld/hw_mock.go b/vendor/google.golang.org/grpc/examples/helloworld/mock/mock_helloworld/hw_mock.go
new file mode 100644
index 00000000000..14957ed5fce
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/helloworld/mock/mock_helloworld/hw_mock.go
@@ -0,0 +1,48 @@
+// Automatically generated by MockGen. DO NOT EDIT!
+// Source: google.golang.org/grpc/examples/helloworld/helloworld (interfaces: GreeterClient)
+
+package mock_helloworld
+
+import (
+	gomock "github.com/golang/mock/gomock"
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+	helloworld "google.golang.org/grpc/examples/helloworld/helloworld"
+)
+
+// Mock of GreeterClient interface
+type MockGreeterClient struct {
+	ctrl     *gomock.Controller
+	recorder *_MockGreeterClientRecorder
+}
+
+// Recorder for MockGreeterClient (not exported)
+type _MockGreeterClientRecorder struct {
+	mock *MockGreeterClient
+}
+
+func NewMockGreeterClient(ctrl *gomock.Controller) *MockGreeterClient {
+	mock := &MockGreeterClient{ctrl: ctrl}
+	mock.recorder = &_MockGreeterClientRecorder{mock}
+	return mock
+}
+
+func (_m *MockGreeterClient) EXPECT() *_MockGreeterClientRecorder {
+	return _m.recorder
+}
+
+func (_m *MockGreeterClient) SayHello(_param0 context.Context, _param1 *helloworld.HelloRequest, _param2 ...grpc.CallOption) (*helloworld.HelloReply, error) {
+	_s := []interface{}{_param0, _param1}
+	for _, _x := range _param2 {
+		_s = append(_s, _x)
+	}
+	ret := _m.ctrl.Call(_m, "SayHello", _s...)
+	ret0, _ := ret[0].(*helloworld.HelloReply)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+func (_mr *_MockGreeterClientRecorder) SayHello(arg0, arg1 interface{}, arg2 ...interface{}) *gomock.Call {
+	_s := append([]interface{}{arg0, arg1}, arg2...)
+	return _mr.mock.ctrl.RecordCall(_mr.mock, "SayHello", _s...)
+}
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/README.md b/vendor/google.golang.org/grpc/examples/route_guide/README.md
new file mode 100644
index 00000000000..a7c0c2b0e53
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/README.md
@@ -0,0 +1,35 @@
+# Description
+The route guide server and client demonstrate how to use grpc go libraries to
+perform unary, client streaming, server streaming and full duplex RPCs.
+
+Please refer to [gRPC Basics: Go] (http://www.grpc.io/docs/tutorials/basic/go.html) for more information.
+
+See the definition of the route guide service in proto/route_guide.proto.
+
+# Run the sample code
+To compile and run the server, assuming you are in the root of the route_guide
+folder, i.e., .../examples/route_guide/, simply:
+
+```sh
+$ go run server/server.go
+```
+
+Likewise, to run the client:
+
+```sh
+$ go run client/client.go
+```
+
+# Optional command line flags
+The server and client both take optional command line flags. For example, the
+client and server run without TLS by default. To enable TLS:
+
+```sh
+$ go run server/server.go -tls=true
+```
+
+and
+
+```sh
+$ go run client/client.go -tls=true
+```
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/client/client.go b/vendor/google.golang.org/grpc/examples/route_guide/client/client.go
new file mode 100644
index 00000000000..fff6398d4d9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/client/client.go
@@ -0,0 +1,205 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package main implements a simple gRPC client that demonstrates how to use gRPC-Go libraries
+// to perform unary, client streaming, server streaming and full duplex RPCs.
+//
+// It interacts with the route guide service whose definition can be found in proto/route_guide.proto.
+package main
+
+import (
+	"flag"
+	"io"
+	"math/rand"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	pb "google.golang.org/grpc/examples/route_guide/routeguide"
+	"google.golang.org/grpc/grpclog"
+)
+
+var (
+	tls                = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
+	caFile             = flag.String("ca_file", "testdata/ca.pem", "The file containning the CA root cert file")
+	serverAddr         = flag.String("server_addr", "127.0.0.1:10000", "The server address in the format of host:port")
+	serverHostOverride = flag.String("server_host_override", "x.test.youtube.com", "The server name use to verify the hostname returned by TLS handshake")
+)
+
+// printFeature gets the feature for the given point.
+func printFeature(client pb.RouteGuideClient, point *pb.Point) {
+	grpclog.Printf("Getting feature for point (%d, %d)", point.Latitude, point.Longitude)
+	feature, err := client.GetFeature(context.Background(), point)
+	if err != nil {
+		grpclog.Fatalf("%v.GetFeatures(_) = _, %v: ", client, err)
+	}
+	grpclog.Println(feature)
+}
+
+// printFeatures lists all the features within the given bounding Rectangle.
+func printFeatures(client pb.RouteGuideClient, rect *pb.Rectangle) {
+	grpclog.Printf("Looking for features within %v", rect)
+	stream, err := client.ListFeatures(context.Background(), rect)
+	if err != nil {
+		grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
+	}
+	for {
+		feature, err := stream.Recv()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			grpclog.Fatalf("%v.ListFeatures(_) = _, %v", client, err)
+		}
+		grpclog.Println(feature)
+	}
+}
+
+// runRecordRoute sends a sequence of points to server and expects to get a RouteSummary from server.
+func runRecordRoute(client pb.RouteGuideClient) {
+	// Create a random number of random points
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	pointCount := int(r.Int31n(100)) + 2 // Traverse at least two points
+	var points []*pb.Point
+	for i := 0; i < pointCount; i++ {
+		points = append(points, randomPoint(r))
+	}
+	grpclog.Printf("Traversing %d points.", len(points))
+	stream, err := client.RecordRoute(context.Background())
+	if err != nil {
+		grpclog.Fatalf("%v.RecordRoute(_) = _, %v", client, err)
+	}
+	for _, point := range points {
+		if err := stream.Send(point); err != nil {
+			grpclog.Fatalf("%v.Send(%v) = %v", stream, point, err)
+		}
+	}
+	reply, err := stream.CloseAndRecv()
+	if err != nil {
+		grpclog.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
+	}
+	grpclog.Printf("Route summary: %v", reply)
+}
+
+// runRouteChat receives a sequence of route notes, while sending notes for various locations.
+func runRouteChat(client pb.RouteGuideClient) {
+	notes := []*pb.RouteNote{
+		{&pb.Point{Latitude: 0, Longitude: 1}, "First message"},
+		{&pb.Point{Latitude: 0, Longitude: 2}, "Second message"},
+		{&pb.Point{Latitude: 0, Longitude: 3}, "Third message"},
+		{&pb.Point{Latitude: 0, Longitude: 1}, "Fourth message"},
+		{&pb.Point{Latitude: 0, Longitude: 2}, "Fifth message"},
+		{&pb.Point{Latitude: 0, Longitude: 3}, "Sixth message"},
+	}
+	stream, err := client.RouteChat(context.Background())
+	if err != nil {
+		grpclog.Fatalf("%v.RouteChat(_) = _, %v", client, err)
+	}
+	waitc := make(chan struct{})
+	go func() {
+		for {
+			in, err := stream.Recv()
+			if err == io.EOF {
+				// read done.
+				close(waitc)
+				return
+			}
+			if err != nil {
+				grpclog.Fatalf("Failed to receive a note : %v", err)
+			}
+			grpclog.Printf("Got message %s at point(%d, %d)", in.Message, in.Location.Latitude, in.Location.Longitude)
+		}
+	}()
+	for _, note := range notes {
+		if err := stream.Send(note); err != nil {
+			grpclog.Fatalf("Failed to send a note: %v", err)
+		}
+	}
+	stream.CloseSend()
+	<-waitc
+}
+
+func randomPoint(r *rand.Rand) *pb.Point {
+	lat := (r.Int31n(180) - 90) * 1e7
+	long := (r.Int31n(360) - 180) * 1e7
+	return &pb.Point{Latitude: lat, Longitude: long}
+}
+
+func main() {
+	flag.Parse()
+	var opts []grpc.DialOption
+	if *tls {
+		var sn string
+		if *serverHostOverride != "" {
+			sn = *serverHostOverride
+		}
+		var creds credentials.TransportCredentials
+		if *caFile != "" {
+			var err error
+			creds, err = credentials.NewClientTLSFromFile(*caFile, sn)
+			if err != nil {
+				grpclog.Fatalf("Failed to create TLS credentials %v", err)
+			}
+		} else {
+			creds = credentials.NewClientTLSFromCert(nil, sn)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+	conn, err := grpc.Dial(*serverAddr, opts...)
+	if err != nil {
+		grpclog.Fatalf("fail to dial: %v", err)
+	}
+	defer conn.Close()
+	client := pb.NewRouteGuideClient(conn)
+
+	// Looking for a valid feature
+	printFeature(client, &pb.Point{Latitude: 409146138, Longitude: -746188906})
+
+	// Feature missing.
+	printFeature(client, &pb.Point{Latitude: 0, Longitude: 0})
+
+	// Looking for features between 40, -75 and 42, -73.
+	printFeatures(client, &pb.Rectangle{
+		Lo: &pb.Point{Latitude: 400000000, Longitude: -750000000},
+		Hi: &pb.Point{Latitude: 420000000, Longitude: -730000000},
+	})
+
+	// RecordRoute
+	runRecordRoute(client)
+
+	// RouteChat
+	runRouteChat(client)
+}
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.pb.go b/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.pb.go
new file mode 100644
index 00000000000..cbcf2f30ade
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.pb.go
@@ -0,0 +1,488 @@
+// Code generated by protoc-gen-go.
+// source: route_guide.proto
+// DO NOT EDIT!
+
+/*
+Package routeguide is a generated protocol buffer package.
+
+It is generated from these files:
+	route_guide.proto
+
+It has these top-level messages:
+	Point
+	Rectangle
+	Feature
+	RouteNote
+	RouteSummary
+*/
+package routeguide
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// Points are represented as latitude-longitude pairs in the E7 representation
+// (degrees multiplied by 10**7 and rounded to the nearest integer).
+// Latitudes should be in the range +/- 90 degrees and longitude should be in
+// the range +/- 180 degrees (inclusive).
+type Point struct {
+	Latitude  int32 `protobuf:"varint,1,opt,name=latitude" json:"latitude,omitempty"`
+	Longitude int32 `protobuf:"varint,2,opt,name=longitude" json:"longitude,omitempty"`
+}
+
+func (m *Point) Reset()                    { *m = Point{} }
+func (m *Point) String() string            { return proto.CompactTextString(m) }
+func (*Point) ProtoMessage()               {}
+func (*Point) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// A latitude-longitude rectangle, represented as two diagonally opposite
+// points "lo" and "hi".
+type Rectangle struct {
+	// One corner of the rectangle.
+	Lo *Point `protobuf:"bytes,1,opt,name=lo" json:"lo,omitempty"`
+	// The other corner of the rectangle.
+	Hi *Point `protobuf:"bytes,2,opt,name=hi" json:"hi,omitempty"`
+}
+
+func (m *Rectangle) Reset()                    { *m = Rectangle{} }
+func (m *Rectangle) String() string            { return proto.CompactTextString(m) }
+func (*Rectangle) ProtoMessage()               {}
+func (*Rectangle) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *Rectangle) GetLo() *Point {
+	if m != nil {
+		return m.Lo
+	}
+	return nil
+}
+
+func (m *Rectangle) GetHi() *Point {
+	if m != nil {
+		return m.Hi
+	}
+	return nil
+}
+
+// A feature names something at a given point.
+//
+// If a feature could not be named, the name is empty.
+type Feature struct {
+	// The name of the feature.
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// The point where the feature is detected.
+	Location *Point `protobuf:"bytes,2,opt,name=location" json:"location,omitempty"`
+}
+
+func (m *Feature) Reset()                    { *m = Feature{} }
+func (m *Feature) String() string            { return proto.CompactTextString(m) }
+func (*Feature) ProtoMessage()               {}
+func (*Feature) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *Feature) GetLocation() *Point {
+	if m != nil {
+		return m.Location
+	}
+	return nil
+}
+
+// A RouteNote is a message sent while at a given point.
+type RouteNote struct {
+	// The location from which the message is sent.
+	Location *Point `protobuf:"bytes,1,opt,name=location" json:"location,omitempty"`
+	// The message to be sent.
+	Message string `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+}
+
+func (m *RouteNote) Reset()                    { *m = RouteNote{} }
+func (m *RouteNote) String() string            { return proto.CompactTextString(m) }
+func (*RouteNote) ProtoMessage()               {}
+func (*RouteNote) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *RouteNote) GetLocation() *Point {
+	if m != nil {
+		return m.Location
+	}
+	return nil
+}
+
+// A RouteSummary is received in response to a RecordRoute rpc.
+//
+// It contains the number of individual points received, the number of
+// detected features, and the total distance covered as the cumulative sum of
+// the distance between each point.
+type RouteSummary struct {
+	// The number of points received.
+	PointCount int32 `protobuf:"varint,1,opt,name=point_count,json=pointCount" json:"point_count,omitempty"`
+	// The number of known features passed while traversing the route.
+	FeatureCount int32 `protobuf:"varint,2,opt,name=feature_count,json=featureCount" json:"feature_count,omitempty"`
+	// The distance covered in metres.
+	Distance int32 `protobuf:"varint,3,opt,name=distance" json:"distance,omitempty"`
+	// The duration of the traversal in seconds.
+	ElapsedTime int32 `protobuf:"varint,4,opt,name=elapsed_time,json=elapsedTime" json:"elapsed_time,omitempty"`
+}
+
+func (m *RouteSummary) Reset()                    { *m = RouteSummary{} }
+func (m *RouteSummary) String() string            { return proto.CompactTextString(m) }
+func (*RouteSummary) ProtoMessage()               {}
+func (*RouteSummary) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+func init() {
+	proto.RegisterType((*Point)(nil), "routeguide.Point")
+	proto.RegisterType((*Rectangle)(nil), "routeguide.Rectangle")
+	proto.RegisterType((*Feature)(nil), "routeguide.Feature")
+	proto.RegisterType((*RouteNote)(nil), "routeguide.RouteNote")
+	proto.RegisterType((*RouteSummary)(nil), "routeguide.RouteSummary")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for RouteGuide service
+
+type RouteGuideClient interface {
+	// A simple RPC.
+	//
+	// Obtains the feature at a given position.
+	//
+	// A feature with an empty name is returned if there's no feature at the given
+	// position.
+	GetFeature(ctx context.Context, in *Point, opts ...grpc.CallOption) (*Feature, error)
+	// A server-to-client streaming RPC.
+	//
+	// Obtains the Features available within the given Rectangle.  Results are
+	// streamed rather than returned at once (e.g. in a response message with a
+	// repeated field), as the rectangle may cover a large area and contain a
+	// huge number of features.
+	ListFeatures(ctx context.Context, in *Rectangle, opts ...grpc.CallOption) (RouteGuide_ListFeaturesClient, error)
+	// A client-to-server streaming RPC.
+	//
+	// Accepts a stream of Points on a route being traversed, returning a
+	// RouteSummary when traversal is completed.
+	RecordRoute(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RecordRouteClient, error)
+	// A Bidirectional streaming RPC.
+	//
+	// Accepts a stream of RouteNotes sent while a route is being traversed,
+	// while receiving other RouteNotes (e.g. from other users).
+	RouteChat(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RouteChatClient, error)
+}
+
+type routeGuideClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewRouteGuideClient(cc *grpc.ClientConn) RouteGuideClient {
+	return &routeGuideClient{cc}
+}
+
+func (c *routeGuideClient) GetFeature(ctx context.Context, in *Point, opts ...grpc.CallOption) (*Feature, error) {
+	out := new(Feature)
+	err := grpc.Invoke(ctx, "/routeguide.RouteGuide/GetFeature", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *routeGuideClient) ListFeatures(ctx context.Context, in *Rectangle, opts ...grpc.CallOption) (RouteGuide_ListFeaturesClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[0], c.cc, "/routeguide.RouteGuide/ListFeatures", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &routeGuideListFeaturesClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type RouteGuide_ListFeaturesClient interface {
+	Recv() (*Feature, error)
+	grpc.ClientStream
+}
+
+type routeGuideListFeaturesClient struct {
+	grpc.ClientStream
+}
+
+func (x *routeGuideListFeaturesClient) Recv() (*Feature, error) {
+	m := new(Feature)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *routeGuideClient) RecordRoute(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RecordRouteClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[1], c.cc, "/routeguide.RouteGuide/RecordRoute", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &routeGuideRecordRouteClient{stream}
+	return x, nil
+}
+
+type RouteGuide_RecordRouteClient interface {
+	Send(*Point) error
+	CloseAndRecv() (*RouteSummary, error)
+	grpc.ClientStream
+}
+
+type routeGuideRecordRouteClient struct {
+	grpc.ClientStream
+}
+
+func (x *routeGuideRecordRouteClient) Send(m *Point) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *routeGuideRecordRouteClient) CloseAndRecv() (*RouteSummary, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(RouteSummary)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *routeGuideClient) RouteChat(ctx context.Context, opts ...grpc.CallOption) (RouteGuide_RouteChatClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_RouteGuide_serviceDesc.Streams[2], c.cc, "/routeguide.RouteGuide/RouteChat", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &routeGuideRouteChatClient{stream}
+	return x, nil
+}
+
+type RouteGuide_RouteChatClient interface {
+	Send(*RouteNote) error
+	Recv() (*RouteNote, error)
+	grpc.ClientStream
+}
+
+type routeGuideRouteChatClient struct {
+	grpc.ClientStream
+}
+
+func (x *routeGuideRouteChatClient) Send(m *RouteNote) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *routeGuideRouteChatClient) Recv() (*RouteNote, error) {
+	m := new(RouteNote)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for RouteGuide service
+
+type RouteGuideServer interface {
+	// A simple RPC.
+	//
+	// Obtains the feature at a given position.
+	//
+	// A feature with an empty name is returned if there's no feature at the given
+	// position.
+	GetFeature(context.Context, *Point) (*Feature, error)
+	// A server-to-client streaming RPC.
+	//
+	// Obtains the Features available within the given Rectangle.  Results are
+	// streamed rather than returned at once (e.g. in a response message with a
+	// repeated field), as the rectangle may cover a large area and contain a
+	// huge number of features.
+	ListFeatures(*Rectangle, RouteGuide_ListFeaturesServer) error
+	// A client-to-server streaming RPC.
+	//
+	// Accepts a stream of Points on a route being traversed, returning a
+	// RouteSummary when traversal is completed.
+	RecordRoute(RouteGuide_RecordRouteServer) error
+	// A Bidirectional streaming RPC.
+	//
+	// Accepts a stream of RouteNotes sent while a route is being traversed,
+	// while receiving other RouteNotes (e.g. from other users).
+	RouteChat(RouteGuide_RouteChatServer) error
+}
+
+func RegisterRouteGuideServer(s *grpc.Server, srv RouteGuideServer) {
+	s.RegisterService(&_RouteGuide_serviceDesc, srv)
+}
+
+func _RouteGuide_GetFeature_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Point)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(RouteGuideServer).GetFeature(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/routeguide.RouteGuide/GetFeature",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RouteGuideServer).GetFeature(ctx, req.(*Point))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _RouteGuide_ListFeatures_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(Rectangle)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(RouteGuideServer).ListFeatures(m, &routeGuideListFeaturesServer{stream})
+}
+
+type RouteGuide_ListFeaturesServer interface {
+	Send(*Feature) error
+	grpc.ServerStream
+}
+
+type routeGuideListFeaturesServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideListFeaturesServer) Send(m *Feature) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _RouteGuide_RecordRoute_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(RouteGuideServer).RecordRoute(&routeGuideRecordRouteServer{stream})
+}
+
+type RouteGuide_RecordRouteServer interface {
+	SendAndClose(*RouteSummary) error
+	Recv() (*Point, error)
+	grpc.ServerStream
+}
+
+type routeGuideRecordRouteServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideRecordRouteServer) SendAndClose(m *RouteSummary) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *routeGuideRecordRouteServer) Recv() (*Point, error) {
+	m := new(Point)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _RouteGuide_RouteChat_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(RouteGuideServer).RouteChat(&routeGuideRouteChatServer{stream})
+}
+
+type RouteGuide_RouteChatServer interface {
+	Send(*RouteNote) error
+	Recv() (*RouteNote, error)
+	grpc.ServerStream
+}
+
+type routeGuideRouteChatServer struct {
+	grpc.ServerStream
+}
+
+func (x *routeGuideRouteChatServer) Send(m *RouteNote) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *routeGuideRouteChatServer) Recv() (*RouteNote, error) {
+	m := new(RouteNote)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _RouteGuide_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "routeguide.RouteGuide",
+	HandlerType: (*RouteGuideServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetFeature",
+			Handler:    _RouteGuide_GetFeature_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ListFeatures",
+			Handler:       _RouteGuide_ListFeatures_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "RecordRoute",
+			Handler:       _RouteGuide_RecordRoute_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "RouteChat",
+			Handler:       _RouteGuide_RouteChat_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "route_guide.proto",
+}
+
+func init() { proto.RegisterFile("route_guide.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 404 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x84, 0x53, 0xc1, 0x4a, 0xeb, 0x40,
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+	0x8e, 0x8d, 0x1c, 0x9d, 0xd6, 0x10, 0xe1, 0x5b, 0x7d, 0xb2, 0xe9, 0x9a, 0x88, 0x2f, 0xc3, 0xeb,
+	0x4b, 0x0e, 0xf6, 0xc3, 0xa5, 0x7c, 0x84, 0x26, 0x23, 0x38, 0x66, 0xdc, 0x0d, 0xb3, 0xd4, 0x77,
+	0xe9, 0x2b, 0x89, 0xd3, 0x88, 0xe6, 0x0d, 0xfa, 0xe4, 0xdf, 0x36, 0xa3, 0x45, 0xf9, 0x4f, 0x2c,
+	0xd0, 0xf3, 0x6f, 0xf5, 0x73, 0x5c, 0x7d, 0x06, 0x00, 0x00, 0xff, 0xff, 0xc8, 0xe4, 0xef, 0xe6,
+	0x31, 0x03, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.proto b/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.proto
new file mode 100644
index 00000000000..5a782aa273b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/routeguide/route_guide.proto
@@ -0,0 +1,125 @@
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "io.grpc.examples.routeguide";
+option java_outer_classname = "RouteGuideProto";
+
+package routeguide;
+
+// Interface exported by the server.
+service RouteGuide {
+  // A simple RPC.
+  //
+  // Obtains the feature at a given position.
+  //
+  // A feature with an empty name is returned if there's no feature at the given
+  // position.
+  rpc GetFeature(Point) returns (Feature) {}
+
+  // A server-to-client streaming RPC.
+  //
+  // Obtains the Features available within the given Rectangle.  Results are
+  // streamed rather than returned at once (e.g. in a response message with a
+  // repeated field), as the rectangle may cover a large area and contain a
+  // huge number of features.
+  rpc ListFeatures(Rectangle) returns (stream Feature) {}
+
+  // A client-to-server streaming RPC.
+  //
+  // Accepts a stream of Points on a route being traversed, returning a
+  // RouteSummary when traversal is completed.
+  rpc RecordRoute(stream Point) returns (RouteSummary) {}
+
+  // A Bidirectional streaming RPC.
+  //
+  // Accepts a stream of RouteNotes sent while a route is being traversed,
+  // while receiving other RouteNotes (e.g. from other users).
+  rpc RouteChat(stream RouteNote) returns (stream RouteNote) {}
+}
+
+// Points are represented as latitude-longitude pairs in the E7 representation
+// (degrees multiplied by 10**7 and rounded to the nearest integer).
+// Latitudes should be in the range +/- 90 degrees and longitude should be in
+// the range +/- 180 degrees (inclusive).
+message Point {
+  int32 latitude = 1;
+  int32 longitude = 2;
+}
+
+// A latitude-longitude rectangle, represented as two diagonally opposite
+// points "lo" and "hi".
+message Rectangle {
+  // One corner of the rectangle.
+  Point lo = 1;
+
+  // The other corner of the rectangle.
+  Point hi = 2;
+}
+
+// A feature names something at a given point.
+//
+// If a feature could not be named, the name is empty.
+message Feature {
+  // The name of the feature.
+  string name = 1;
+
+  // The point where the feature is detected.
+  Point location = 2;
+}
+
+// A RouteNote is a message sent while at a given point.
+message RouteNote {
+  // The location from which the message is sent.
+  Point location = 1;
+
+  // The message to be sent.
+  string message = 2;
+}
+
+// A RouteSummary is received in response to a RecordRoute rpc.
+//
+// It contains the number of individual points received, the number of
+// detected features, and the total distance covered as the cumulative sum of
+// the distance between each point.
+message RouteSummary {
+  // The number of points received.
+  int32 point_count = 1;
+
+  // The number of known features passed while traversing the route.
+  int32 feature_count = 2;
+
+  // The distance covered in metres.
+  int32 distance = 3;
+
+  // The duration of the traversal in seconds.
+  int32 elapsed_time = 4;
+}
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/server/server.go b/vendor/google.golang.org/grpc/examples/route_guide/server/server.go
new file mode 100644
index 00000000000..5932722bfd7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/server/server.go
@@ -0,0 +1,239 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package main implements a simple gRPC server that demonstrates how to use gRPC-Go libraries
+// to perform unary, client streaming, server streaming and full duplex RPCs.
+//
+// It implements the route guide service whose definition can be found in proto/route_guide.proto.
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math"
+	"net"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+
+	"github.com/golang/protobuf/proto"
+
+	pb "google.golang.org/grpc/examples/route_guide/routeguide"
+)
+
+var (
+	tls        = flag.Bool("tls", false, "Connection uses TLS if true, else plain TCP")
+	certFile   = flag.String("cert_file", "testdata/server1.pem", "The TLS cert file")
+	keyFile    = flag.String("key_file", "testdata/server1.key", "The TLS key file")
+	jsonDBFile = flag.String("json_db_file", "testdata/route_guide_db.json", "A json file containing a list of features")
+	port       = flag.Int("port", 10000, "The server port")
+)
+
+type routeGuideServer struct {
+	savedFeatures []*pb.Feature
+	routeNotes    map[string][]*pb.RouteNote
+}
+
+// GetFeature returns the feature at the given point.
+func (s *routeGuideServer) GetFeature(ctx context.Context, point *pb.Point) (*pb.Feature, error) {
+	for _, feature := range s.savedFeatures {
+		if proto.Equal(feature.Location, point) {
+			return feature, nil
+		}
+	}
+	// No feature was found, return an unnamed feature
+	return &pb.Feature{Location: point}, nil
+}
+
+// ListFeatures lists all features contained within the given bounding Rectangle.
+func (s *routeGuideServer) ListFeatures(rect *pb.Rectangle, stream pb.RouteGuide_ListFeaturesServer) error {
+	for _, feature := range s.savedFeatures {
+		if inRange(feature.Location, rect) {
+			if err := stream.Send(feature); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// RecordRoute records a route composited of a sequence of points.
+//
+// It gets a stream of points, and responds with statistics about the "trip":
+// number of points,  number of known features visited, total distance traveled, and
+// total time spent.
+func (s *routeGuideServer) RecordRoute(stream pb.RouteGuide_RecordRouteServer) error {
+	var pointCount, featureCount, distance int32
+	var lastPoint *pb.Point
+	startTime := time.Now()
+	for {
+		point, err := stream.Recv()
+		if err == io.EOF {
+			endTime := time.Now()
+			return stream.SendAndClose(&pb.RouteSummary{
+				PointCount:   pointCount,
+				FeatureCount: featureCount,
+				Distance:     distance,
+				ElapsedTime:  int32(endTime.Sub(startTime).Seconds()),
+			})
+		}
+		if err != nil {
+			return err
+		}
+		pointCount++
+		for _, feature := range s.savedFeatures {
+			if proto.Equal(feature.Location, point) {
+				featureCount++
+			}
+		}
+		if lastPoint != nil {
+			distance += calcDistance(lastPoint, point)
+		}
+		lastPoint = point
+	}
+}
+
+// RouteChat receives a stream of message/location pairs, and responds with a stream of all
+// previous messages at each of those locations.
+func (s *routeGuideServer) RouteChat(stream pb.RouteGuide_RouteChatServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		key := serialize(in.Location)
+		if _, present := s.routeNotes[key]; !present {
+			s.routeNotes[key] = []*pb.RouteNote{in}
+		} else {
+			s.routeNotes[key] = append(s.routeNotes[key], in)
+		}
+		for _, note := range s.routeNotes[key] {
+			if err := stream.Send(note); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+// loadFeatures loads features from a JSON file.
+func (s *routeGuideServer) loadFeatures(filePath string) {
+	file, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		grpclog.Fatalf("Failed to load default features: %v", err)
+	}
+	if err := json.Unmarshal(file, &s.savedFeatures); err != nil {
+		grpclog.Fatalf("Failed to load default features: %v", err)
+	}
+}
+
+func toRadians(num float64) float64 {
+	return num * math.Pi / float64(180)
+}
+
+// calcDistance calculates the distance between two points using the "haversine" formula.
+// This code was taken from http://www.movable-type.co.uk/scripts/latlong.html.
+func calcDistance(p1 *pb.Point, p2 *pb.Point) int32 {
+	const CordFactor float64 = 1e7
+	const R float64 = float64(6371000) // metres
+	lat1 := float64(p1.Latitude) / CordFactor
+	lat2 := float64(p2.Latitude) / CordFactor
+	lng1 := float64(p1.Longitude) / CordFactor
+	lng2 := float64(p2.Longitude) / CordFactor
+	φ1 := toRadians(lat1)
+	φ2 := toRadians(lat2)
+	Δφ := toRadians(lat2 - lat1)
+	Δλ := toRadians(lng2 - lng1)
+
+	a := math.Sin(Δφ/2)*math.Sin(Δφ/2) +
+		math.Cos(φ1)*math.Cos(φ2)*
+			math.Sin(Δλ/2)*math.Sin(Δλ/2)
+	c := 2 * math.Atan2(math.Sqrt(a), math.Sqrt(1-a))
+
+	distance := R * c
+	return int32(distance)
+}
+
+func inRange(point *pb.Point, rect *pb.Rectangle) bool {
+	left := math.Min(float64(rect.Lo.Longitude), float64(rect.Hi.Longitude))
+	right := math.Max(float64(rect.Lo.Longitude), float64(rect.Hi.Longitude))
+	top := math.Max(float64(rect.Lo.Latitude), float64(rect.Hi.Latitude))
+	bottom := math.Min(float64(rect.Lo.Latitude), float64(rect.Hi.Latitude))
+
+	if float64(point.Longitude) >= left &&
+		float64(point.Longitude) <= right &&
+		float64(point.Latitude) >= bottom &&
+		float64(point.Latitude) <= top {
+		return true
+	}
+	return false
+}
+
+func serialize(point *pb.Point) string {
+	return fmt.Sprintf("%d %d", point.Latitude, point.Longitude)
+}
+
+func newServer() *routeGuideServer {
+	s := new(routeGuideServer)
+	s.loadFeatures(*jsonDBFile)
+	s.routeNotes = make(map[string][]*pb.RouteNote)
+	return s
+}
+
+func main() {
+	flag.Parse()
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		grpclog.Fatalf("failed to listen: %v", err)
+	}
+	var opts []grpc.ServerOption
+	if *tls {
+		creds, err := credentials.NewServerTLSFromFile(*certFile, *keyFile)
+		if err != nil {
+			grpclog.Fatalf("Failed to generate credentials %v", err)
+		}
+		opts = []grpc.ServerOption{grpc.Creds(creds)}
+	}
+	grpcServer := grpc.NewServer(opts...)
+	pb.RegisterRouteGuideServer(grpcServer, newServer())
+	grpcServer.Serve(lis)
+}
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/testdata/ca.pem b/vendor/google.golang.org/grpc/examples/route_guide/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/testdata/route_guide_db.json b/vendor/google.golang.org/grpc/examples/route_guide/testdata/route_guide_db.json
new file mode 100644
index 00000000000..9d6a980ab7d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/testdata/route_guide_db.json
@@ -0,0 +1,601 @@
+[{
+    "location": {
+        "latitude": 407838351,
+        "longitude": -746143763
+    },
+    "name": "Patriots Path, Mendham, NJ 07945, USA"
+}, {
+    "location": {
+        "latitude": 408122808,
+        "longitude": -743999179
+    },
+    "name": "101 New Jersey 10, Whippany, NJ 07981, USA"
+}, {
+    "location": {
+        "latitude": 413628156,
+        "longitude": -749015468
+    },
+    "name": "U.S. 6, Shohola, PA 18458, USA"
+}, {
+    "location": {
+        "latitude": 419999544,
+        "longitude": -740371136
+    },
+    "name": "5 Conners Road, Kingston, NY 12401, USA"
+}, {
+    "location": {
+        "latitude": 414008389,
+        "longitude": -743951297
+    },
+    "name": "Mid Hudson Psychiatric Center, New Hampton, NY 10958, USA"
+}, {
+    "location": {
+        "latitude": 419611318,
+        "longitude": -746524769
+    },
+    "name": "287 Flugertown Road, Livingston Manor, NY 12758, USA"
+}, {
+    "location": {
+        "latitude": 406109563,
+        "longitude": -742186778
+    },
+    "name": "4001 Tremley Point Road, Linden, NJ 07036, USA"
+}, {
+    "location": {
+        "latitude": 416802456,
+        "longitude": -742370183
+    },
+    "name": "352 South Mountain Road, Wallkill, NY 12589, USA"
+}, {
+    "location": {
+        "latitude": 412950425,
+        "longitude": -741077389
+    },
+    "name": "Bailey Turn Road, Harriman, NY 10926, USA"
+}, {
+    "location": {
+        "latitude": 412144655,
+        "longitude": -743949739
+    },
+    "name": "193-199 Wawayanda Road, Hewitt, NJ 07421, USA"
+}, {
+    "location": {
+        "latitude": 415736605,
+        "longitude": -742847522
+    },
+    "name": "406-496 Ward Avenue, Pine Bush, NY 12566, USA"
+}, {
+    "location": {
+        "latitude": 413843930,
+        "longitude": -740501726
+    },
+    "name": "162 Merrill Road, Highland Mills, NY 10930, USA"
+}, {
+    "location": {
+        "latitude": 410873075,
+        "longitude": -744459023
+    },
+    "name": "Clinton Road, West Milford, NJ 07480, USA"
+}, {
+    "location": {
+        "latitude": 412346009,
+        "longitude": -744026814
+    },
+    "name": "16 Old Brook Lane, Warwick, NY 10990, USA"
+}, {
+    "location": {
+        "latitude": 402948455,
+        "longitude": -747903913
+    },
+    "name": "3 Drake Lane, Pennington, NJ 08534, USA"
+}, {
+    "location": {
+        "latitude": 406337092,
+        "longitude": -740122226
+    },
+    "name": "6324 8th Avenue, Brooklyn, NY 11220, USA"
+}, {
+    "location": {
+        "latitude": 406421967,
+        "longitude": -747727624
+    },
+    "name": "1 Merck Access Road, Whitehouse Station, NJ 08889, USA"
+}, {
+    "location": {
+        "latitude": 416318082,
+        "longitude": -749677716
+    },
+    "name": "78-98 Schalck Road, Narrowsburg, NY 12764, USA"
+}, {
+    "location": {
+        "latitude": 415301720,
+        "longitude": -748416257
+    },
+    "name": "282 Lakeview Drive Road, Highland Lake, NY 12743, USA"
+}, {
+    "location": {
+        "latitude": 402647019,
+        "longitude": -747071791
+    },
+    "name": "330 Evelyn Avenue, Hamilton Township, NJ 08619, USA"
+}, {
+    "location": {
+        "latitude": 412567807,
+        "longitude": -741058078
+    },
+    "name": "New York State Reference Route 987E, Southfields, NY 10975, USA"
+}, {
+    "location": {
+        "latitude": 416855156,
+        "longitude": -744420597
+    },
+    "name": "103-271 Tempaloni Road, Ellenville, NY 12428, USA"
+}, {
+    "location": {
+        "latitude": 404663628,
+        "longitude": -744820157
+    },
+    "name": "1300 Airport Road, North Brunswick Township, NJ 08902, USA"
+}, {
+    "location": {
+        "latitude": 407113723,
+        "longitude": -749746483
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 402133926,
+        "longitude": -743613249
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 400273442,
+        "longitude": -741220915
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 411236786,
+        "longitude": -744070769
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 411633782,
+        "longitude": -746784970
+    },
+    "name": "211-225 Plains Road, Augusta, NJ 07822, USA"
+}, {
+    "location": {
+        "latitude": 415830701,
+        "longitude": -742952812
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 413447164,
+        "longitude": -748712898
+    },
+    "name": "165 Pedersen Ridge Road, Milford, PA 18337, USA"
+}, {
+    "location": {
+        "latitude": 405047245,
+        "longitude": -749800722
+    },
+    "name": "100-122 Locktown Road, Frenchtown, NJ 08825, USA"
+}, {
+    "location": {
+        "latitude": 418858923,
+        "longitude": -746156790
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 417951888,
+        "longitude": -748484944
+    },
+    "name": "650-652 Willi Hill Road, Swan Lake, NY 12783, USA"
+}, {
+    "location": {
+        "latitude": 407033786,
+        "longitude": -743977337
+    },
+    "name": "26 East 3rd Street, New Providence, NJ 07974, USA"
+}, {
+    "location": {
+        "latitude": 417548014,
+        "longitude": -740075041
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 410395868,
+        "longitude": -744972325
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 404615353,
+        "longitude": -745129803
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 406589790,
+        "longitude": -743560121
+    },
+    "name": "611 Lawrence Avenue, Westfield, NJ 07090, USA"
+}, {
+    "location": {
+        "latitude": 414653148,
+        "longitude": -740477477
+    },
+    "name": "18 Lannis Avenue, New Windsor, NY 12553, USA"
+}, {
+    "location": {
+        "latitude": 405957808,
+        "longitude": -743255336
+    },
+    "name": "82-104 Amherst Avenue, Colonia, NJ 07067, USA"
+}, {
+    "location": {
+        "latitude": 411733589,
+        "longitude": -741648093
+    },
+    "name": "170 Seven Lakes Drive, Sloatsburg, NY 10974, USA"
+}, {
+    "location": {
+        "latitude": 412676291,
+        "longitude": -742606606
+    },
+    "name": "1270 Lakes Road, Monroe, NY 10950, USA"
+}, {
+    "location": {
+        "latitude": 409224445,
+        "longitude": -748286738
+    },
+    "name": "509-535 Alphano Road, Great Meadows, NJ 07838, USA"
+}, {
+    "location": {
+        "latitude": 406523420,
+        "longitude": -742135517
+    },
+    "name": "652 Garden Street, Elizabeth, NJ 07202, USA"
+}, {
+    "location": {
+        "latitude": 401827388,
+        "longitude": -740294537
+    },
+    "name": "349 Sea Spray Court, Neptune City, NJ 07753, USA"
+}, {
+    "location": {
+        "latitude": 410564152,
+        "longitude": -743685054
+    },
+    "name": "13-17 Stanley Street, West Milford, NJ 07480, USA"
+}, {
+    "location": {
+        "latitude": 408472324,
+        "longitude": -740726046
+    },
+    "name": "47 Industrial Avenue, Teterboro, NJ 07608, USA"
+}, {
+    "location": {
+        "latitude": 412452168,
+        "longitude": -740214052
+    },
+    "name": "5 White Oak Lane, Stony Point, NY 10980, USA"
+}, {
+    "location": {
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+        "longitude": -746188906
+    },
+    "name": "Berkshire Valley Management Area Trail, Jefferson, NJ, USA"
+}, {
+    "location": {
+        "latitude": 404701380,
+        "longitude": -744781745
+    },
+    "name": "1007 Jersey Avenue, New Brunswick, NJ 08901, USA"
+}, {
+    "location": {
+        "latitude": 409642566,
+        "longitude": -746017679
+    },
+    "name": "6 East Emerald Isle Drive, Lake Hopatcong, NJ 07849, USA"
+}, {
+    "location": {
+        "latitude": 408031728,
+        "longitude": -748645385
+    },
+    "name": "1358-1474 New Jersey 57, Port Murray, NJ 07865, USA"
+}, {
+    "location": {
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+    },
+    "name": "367 Prospect Road, Chester, NY 10918, USA"
+}, {
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+        "longitude": -740282632
+    },
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+}, {
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+        "longitude": -746201391
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+    "name": "11 Ward Street, Mount Arlington, NJ 07856, USA"
+}, {
+    "location": {
+        "latitude": 406685311,
+        "longitude": -742108603
+    },
+    "name": "300-398 Jefferson Avenue, Elizabeth, NJ 07201, USA"
+}, {
+    "location": {
+        "latitude": 419018117,
+        "longitude": -749142781
+    },
+    "name": "43 Dreher Road, Roscoe, NY 12776, USA"
+}, {
+    "location": {
+        "latitude": 412856162,
+        "longitude": -745148837
+    },
+    "name": "Swan Street, Pine Island, NY 10969, USA"
+}, {
+    "location": {
+        "latitude": 416560744,
+        "longitude": -746721964
+    },
+    "name": "66 Pleasantview Avenue, Monticello, NY 12701, USA"
+}, {
+    "location": {
+        "latitude": 405314270,
+        "longitude": -749836354
+    },
+    "name": ""
+}, {
+    "location": {
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+        "longitude": -743327440
+    },
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+}, {
+    "location": {
+        "latitude": 415534177,
+        "longitude": -742900616
+    },
+    "name": "565 Winding Hills Road, Montgomery, NY 12549, USA"
+}, {
+    "location": {
+        "latitude": 406898530,
+        "longitude": -749127080
+    },
+    "name": "231 Rocky Run Road, Glen Gardner, NJ 08826, USA"
+}, {
+    "location": {
+        "latitude": 407586880,
+        "longitude": -741670168
+    },
+    "name": "100 Mount Pleasant Avenue, Newark, NJ 07104, USA"
+}, {
+    "location": {
+        "latitude": 400106455,
+        "longitude": -742870190
+    },
+    "name": "517-521 Huntington Drive, Manchester Township, NJ 08759, USA"
+}, {
+    "location": {
+        "latitude": 400066188,
+        "longitude": -746793294
+    },
+    "name": ""
+}, {
+    "location": {
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+        "longitude": -744102673
+    },
+    "name": "40 Mountain Road, Napanoch, NY 12458, USA"
+}, {
+    "location": {
+        "latitude": 414204288,
+        "longitude": -747895140
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 414777405,
+        "longitude": -740615601
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 415464475,
+        "longitude": -747175374
+    },
+    "name": "48 North Road, Forestburgh, NY 12777, USA"
+}, {
+    "location": {
+        "latitude": 404062378,
+        "longitude": -746376177
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 405688272,
+        "longitude": -749285130
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 400342070,
+        "longitude": -748788996
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+    "name": ""
+}, {
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+        "latitude": 401809022,
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+    },
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+}, {
+    "location": {
+        "latitude": 404226644,
+        "longitude": -740517141
+    },
+    "name": "9 Thompson Avenue, Leonardo, NJ 07737, USA"
+}, {
+    "location": {
+        "latitude": 410322033,
+        "longitude": -747871659
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 407100674,
+        "longitude": -747742727
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 418811433,
+        "longitude": -741718005
+    },
+    "name": "213 Bush Road, Stone Ridge, NY 12484, USA"
+}, {
+    "location": {
+        "latitude": 415034302,
+        "longitude": -743850945
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 411349992,
+        "longitude": -743694161
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 404839914,
+        "longitude": -744759616
+    },
+    "name": "1-17 Bergen Court, New Brunswick, NJ 08901, USA"
+}, {
+    "location": {
+        "latitude": 414638017,
+        "longitude": -745957854
+    },
+    "name": "35 Oakland Valley Road, Cuddebackville, NY 12729, USA"
+}, {
+    "location": {
+        "latitude": 412127800,
+        "longitude": -740173578
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 401263460,
+        "longitude": -747964303
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 412843391,
+        "longitude": -749086026
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 418512773,
+        "longitude": -743067823
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 404318328,
+        "longitude": -740835638
+    },
+    "name": "42-102 Main Street, Belford, NJ 07718, USA"
+}, {
+    "location": {
+        "latitude": 419020746,
+        "longitude": -741172328
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 404080723,
+        "longitude": -746119569
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 401012643,
+        "longitude": -744035134
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 404306372,
+        "longitude": -741079661
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 403966326,
+        "longitude": -748519297
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 405002031,
+        "longitude": -748407866
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 409532885,
+        "longitude": -742200683
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 416851321,
+        "longitude": -742674555
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 406411633,
+        "longitude": -741722051
+    },
+    "name": "3387 Richmond Terrace, Staten Island, NY 10303, USA"
+}, {
+    "location": {
+        "latitude": 413069058,
+        "longitude": -744597778
+    },
+    "name": "261 Van Sickle Road, Goshen, NY 10924, USA"
+}, {
+    "location": {
+        "latitude": 418465462,
+        "longitude": -746859398
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 411733222,
+        "longitude": -744228360
+    },
+    "name": ""
+}, {
+    "location": {
+        "latitude": 410248224,
+        "longitude": -747127767
+    },
+    "name": "3 Hasta Way, Newton, NJ 07860, USA"
+}]
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.key b/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----
+MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAOHDFScoLCVJpYDD
+M4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1BgzkWF+slf
+3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd9N8YwbBY
+AckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAECgYAn7qGnM2vbjJNBm0VZCkOkTIWm
+V10okw7EPJrdL2mkre9NasghNXbE1y5zDshx5Nt3KsazKOxTT8d0Jwh/3KbaN+YY
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+DJULAkB8B2MnyzOg0pNFJqBJuH29bKCcHa8gHJzqXhNO5lAlEbMK95p/P2Wi+4Hd
+aiEIAF1BF326QJcvYKmwSmrORp85AkAlSNxRJ50OWrfMZnBgzVjDx3xG6KsFQVk2
+ol6VhqL6dFgKUORFUWBvnKSyhjJxurlPEahV6oo6+A+mPhFY8eUvAkAZQyTdupP3
+XEFQKctGz+9+gKkemDp7LBBMEMBXrGTLPhpEfcjv/7KPdnFHYmhYeBTBnuVmTVWe
+F98XJ7tIFfJq
+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.pem b/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/examples/route_guide/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET
+MBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0cyBQ
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+y4jjdvTZeLDVBlueZUTDRmy2feY5aZIU18vFDK08dTG0A87pppuv1LNIR3loveU8
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go b/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go
new file mode 100644
index 00000000000..7be89477db8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go
@@ -0,0 +1,557 @@
+// Code generated by protoc-gen-go.
+// source: grpclb.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_lb_v1 is a generated protocol buffer package.
+
+It is generated from these files:
+	grpclb.proto
+
+It has these top-level messages:
+	Duration
+	LoadBalanceRequest
+	InitialLoadBalanceRequest
+	ClientStats
+	LoadBalanceResponse
+	InitialLoadBalanceResponse
+	ServerList
+	Server
+*/
+package grpc_lb_v1
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type Duration struct {
+	// Signed seconds of the span of time. Must be from -315,576,000,000
+	// to +315,576,000,000 inclusive.
+	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
+	// Signed fractions of a second at nanosecond resolution of the span
+	// of time. Durations less than one second are represented with a 0
+	// `seconds` field and a positive or negative `nanos` field. For durations
+	// of one second or more, a non-zero value for the `nanos` field must be
+	// of the same sign as the `seconds` field. Must be from -999,999,999
+	// to +999,999,999 inclusive.
+	Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
+}
+
+func (m *Duration) Reset()                    { *m = Duration{} }
+func (m *Duration) String() string            { return proto.CompactTextString(m) }
+func (*Duration) ProtoMessage()               {}
+func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type LoadBalanceRequest struct {
+	// Types that are valid to be assigned to LoadBalanceRequestType:
+	//	*LoadBalanceRequest_InitialRequest
+	//	*LoadBalanceRequest_ClientStats
+	LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
+}
+
+func (m *LoadBalanceRequest) Reset()                    { *m = LoadBalanceRequest{} }
+func (m *LoadBalanceRequest) String() string            { return proto.CompactTextString(m) }
+func (*LoadBalanceRequest) ProtoMessage()               {}
+func (*LoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+type isLoadBalanceRequest_LoadBalanceRequestType interface {
+	isLoadBalanceRequest_LoadBalanceRequestType()
+}
+
+type LoadBalanceRequest_InitialRequest struct {
+	InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,oneof"`
+}
+type LoadBalanceRequest_ClientStats struct {
+	ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,oneof"`
+}
+
+func (*LoadBalanceRequest_InitialRequest) isLoadBalanceRequest_LoadBalanceRequestType() {}
+func (*LoadBalanceRequest_ClientStats) isLoadBalanceRequest_LoadBalanceRequestType()    {}
+
+func (m *LoadBalanceRequest) GetLoadBalanceRequestType() isLoadBalanceRequest_LoadBalanceRequestType {
+	if m != nil {
+		return m.LoadBalanceRequestType
+	}
+	return nil
+}
+
+func (m *LoadBalanceRequest) GetInitialRequest() *InitialLoadBalanceRequest {
+	if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_InitialRequest); ok {
+		return x.InitialRequest
+	}
+	return nil
+}
+
+func (m *LoadBalanceRequest) GetClientStats() *ClientStats {
+	if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_ClientStats); ok {
+		return x.ClientStats
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*LoadBalanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _LoadBalanceRequest_OneofMarshaler, _LoadBalanceRequest_OneofUnmarshaler, _LoadBalanceRequest_OneofSizer, []interface{}{
+		(*LoadBalanceRequest_InitialRequest)(nil),
+		(*LoadBalanceRequest_ClientStats)(nil),
+	}
+}
+
+func _LoadBalanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*LoadBalanceRequest)
+	// load_balance_request_type
+	switch x := m.LoadBalanceRequestType.(type) {
+	case *LoadBalanceRequest_InitialRequest:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.InitialRequest); err != nil {
+			return err
+		}
+	case *LoadBalanceRequest_ClientStats:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ClientStats); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("LoadBalanceRequest.LoadBalanceRequestType has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _LoadBalanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*LoadBalanceRequest)
+	switch tag {
+	case 1: // load_balance_request_type.initial_request
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(InitialLoadBalanceRequest)
+		err := b.DecodeMessage(msg)
+		m.LoadBalanceRequestType = &LoadBalanceRequest_InitialRequest{msg}
+		return true, err
+	case 2: // load_balance_request_type.client_stats
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ClientStats)
+		err := b.DecodeMessage(msg)
+		m.LoadBalanceRequestType = &LoadBalanceRequest_ClientStats{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*LoadBalanceRequest)
+	// load_balance_request_type
+	switch x := m.LoadBalanceRequestType.(type) {
+	case *LoadBalanceRequest_InitialRequest:
+		s := proto.Size(x.InitialRequest)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadBalanceRequest_ClientStats:
+		s := proto.Size(x.ClientStats)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type InitialLoadBalanceRequest struct {
+	// Name of load balanced service (IE, service.grpc.gslb.google.com)
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+}
+
+func (m *InitialLoadBalanceRequest) Reset()                    { *m = InitialLoadBalanceRequest{} }
+func (m *InitialLoadBalanceRequest) String() string            { return proto.CompactTextString(m) }
+func (*InitialLoadBalanceRequest) ProtoMessage()               {}
+func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+// Contains client level statistics that are useful to load balancing. Each
+// count should be reset to zero after reporting the stats.
+type ClientStats struct {
+	// The total number of requests sent by the client since the last report.
+	TotalRequests int64 `protobuf:"varint,1,opt,name=total_requests" json:"total_requests,omitempty"`
+	// The number of client rpc errors since the last report.
+	ClientRpcErrors int64 `protobuf:"varint,2,opt,name=client_rpc_errors" json:"client_rpc_errors,omitempty"`
+	// The number of dropped requests since the last report.
+	DroppedRequests int64 `protobuf:"varint,3,opt,name=dropped_requests" json:"dropped_requests,omitempty"`
+}
+
+func (m *ClientStats) Reset()                    { *m = ClientStats{} }
+func (m *ClientStats) String() string            { return proto.CompactTextString(m) }
+func (*ClientStats) ProtoMessage()               {}
+func (*ClientStats) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+type LoadBalanceResponse struct {
+	// Types that are valid to be assigned to LoadBalanceResponseType:
+	//	*LoadBalanceResponse_InitialResponse
+	//	*LoadBalanceResponse_ServerList
+	LoadBalanceResponseType isLoadBalanceResponse_LoadBalanceResponseType `protobuf_oneof:"load_balance_response_type"`
+}
+
+func (m *LoadBalanceResponse) Reset()                    { *m = LoadBalanceResponse{} }
+func (m *LoadBalanceResponse) String() string            { return proto.CompactTextString(m) }
+func (*LoadBalanceResponse) ProtoMessage()               {}
+func (*LoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+type isLoadBalanceResponse_LoadBalanceResponseType interface {
+	isLoadBalanceResponse_LoadBalanceResponseType()
+}
+
+type LoadBalanceResponse_InitialResponse struct {
+	InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,oneof"`
+}
+type LoadBalanceResponse_ServerList struct {
+	ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,oneof"`
+}
+
+func (*LoadBalanceResponse_InitialResponse) isLoadBalanceResponse_LoadBalanceResponseType() {}
+func (*LoadBalanceResponse_ServerList) isLoadBalanceResponse_LoadBalanceResponseType()      {}
+
+func (m *LoadBalanceResponse) GetLoadBalanceResponseType() isLoadBalanceResponse_LoadBalanceResponseType {
+	if m != nil {
+		return m.LoadBalanceResponseType
+	}
+	return nil
+}
+
+func (m *LoadBalanceResponse) GetInitialResponse() *InitialLoadBalanceResponse {
+	if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_InitialResponse); ok {
+		return x.InitialResponse
+	}
+	return nil
+}
+
+func (m *LoadBalanceResponse) GetServerList() *ServerList {
+	if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_ServerList); ok {
+		return x.ServerList
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*LoadBalanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _LoadBalanceResponse_OneofMarshaler, _LoadBalanceResponse_OneofUnmarshaler, _LoadBalanceResponse_OneofSizer, []interface{}{
+		(*LoadBalanceResponse_InitialResponse)(nil),
+		(*LoadBalanceResponse_ServerList)(nil),
+	}
+}
+
+func _LoadBalanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*LoadBalanceResponse)
+	// load_balance_response_type
+	switch x := m.LoadBalanceResponseType.(type) {
+	case *LoadBalanceResponse_InitialResponse:
+		b.EncodeVarint(1<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.InitialResponse); err != nil {
+			return err
+		}
+	case *LoadBalanceResponse_ServerList:
+		b.EncodeVarint(2<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ServerList); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("LoadBalanceResponse.LoadBalanceResponseType has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _LoadBalanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*LoadBalanceResponse)
+	switch tag {
+	case 1: // load_balance_response_type.initial_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(InitialLoadBalanceResponse)
+		err := b.DecodeMessage(msg)
+		m.LoadBalanceResponseType = &LoadBalanceResponse_InitialResponse{msg}
+		return true, err
+	case 2: // load_balance_response_type.server_list
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ServerList)
+		err := b.DecodeMessage(msg)
+		m.LoadBalanceResponseType = &LoadBalanceResponse_ServerList{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _LoadBalanceResponse_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*LoadBalanceResponse)
+	// load_balance_response_type
+	switch x := m.LoadBalanceResponseType.(type) {
+	case *LoadBalanceResponse_InitialResponse:
+		s := proto.Size(x.InitialResponse)
+		n += proto.SizeVarint(1<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *LoadBalanceResponse_ServerList:
+		s := proto.Size(x.ServerList)
+		n += proto.SizeVarint(2<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+type InitialLoadBalanceResponse struct {
+	// This is an application layer redirect that indicates the client should use
+	// the specified server for load balancing. When this field is non-empty in
+	// the response, the client should open a separate connection to the
+	// load_balancer_delegate and call the BalanceLoad method.
+	LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate" json:"load_balancer_delegate,omitempty"`
+	// This interval defines how often the client should send the client stats
+	// to the load balancer. Stats should only be reported when the duration is
+	// positive.
+	ClientStatsReportInterval *Duration `protobuf:"bytes,3,opt,name=client_stats_report_interval" json:"client_stats_report_interval,omitempty"`
+}
+
+func (m *InitialLoadBalanceResponse) Reset()                    { *m = InitialLoadBalanceResponse{} }
+func (m *InitialLoadBalanceResponse) String() string            { return proto.CompactTextString(m) }
+func (*InitialLoadBalanceResponse) ProtoMessage()               {}
+func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *Duration {
+	if m != nil {
+		return m.ClientStatsReportInterval
+	}
+	return nil
+}
+
+type ServerList struct {
+	// Contains a list of servers selected by the load balancer. The list will
+	// be updated when server resolutions change or as needed to balance load
+	// across more servers. The client should consume the server list in order
+	// unless instructed otherwise via the client_config.
+	Servers []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
+	// Indicates the amount of time that the client should consider this server
+	// list as valid. It may be considered stale after waiting this interval of
+	// time after receiving the list. If the interval is not positive, the
+	// client can assume the list is valid until the next list is received.
+	ExpirationInterval *Duration `protobuf:"bytes,3,opt,name=expiration_interval" json:"expiration_interval,omitempty"`
+}
+
+func (m *ServerList) Reset()                    { *m = ServerList{} }
+func (m *ServerList) String() string            { return proto.CompactTextString(m) }
+func (*ServerList) ProtoMessage()               {}
+func (*ServerList) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *ServerList) GetServers() []*Server {
+	if m != nil {
+		return m.Servers
+	}
+	return nil
+}
+
+func (m *ServerList) GetExpirationInterval() *Duration {
+	if m != nil {
+		return m.ExpirationInterval
+	}
+	return nil
+}
+
+type Server struct {
+	// A resolved address for the server, serialized in network-byte-order. It may
+	// either be an IPv4 or IPv6 address.
+	IpAddress []byte `protobuf:"bytes,1,opt,name=ip_address,proto3" json:"ip_address,omitempty"`
+	// A resolved port number for the server.
+	Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
+	// An opaque but printable token given to the frontend for each pick. All
+	// frontend requests for that pick must include the token in its initial
+	// metadata. The token is used by the backend to verify the request and to
+	// allow the backend to report load to the gRPC LB system.
+	LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token" json:"load_balance_token,omitempty"`
+	// Indicates whether this particular request should be dropped by the client
+	// when this server is chosen from the list.
+	DropRequest bool `protobuf:"varint,4,opt,name=drop_request" json:"drop_request,omitempty"`
+}
+
+func (m *Server) Reset()                    { *m = Server{} }
+func (m *Server) String() string            { return proto.CompactTextString(m) }
+func (*Server) ProtoMessage()               {}
+func (*Server) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func init() {
+	proto.RegisterType((*Duration)(nil), "grpc.lb.v1.Duration")
+	proto.RegisterType((*LoadBalanceRequest)(nil), "grpc.lb.v1.LoadBalanceRequest")
+	proto.RegisterType((*InitialLoadBalanceRequest)(nil), "grpc.lb.v1.InitialLoadBalanceRequest")
+	proto.RegisterType((*ClientStats)(nil), "grpc.lb.v1.ClientStats")
+	proto.RegisterType((*LoadBalanceResponse)(nil), "grpc.lb.v1.LoadBalanceResponse")
+	proto.RegisterType((*InitialLoadBalanceResponse)(nil), "grpc.lb.v1.InitialLoadBalanceResponse")
+	proto.RegisterType((*ServerList)(nil), "grpc.lb.v1.ServerList")
+	proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for LoadBalancer service
+
+type LoadBalancerClient interface {
+	// Bidirectional rpc to get a list of servers.
+	BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error)
+}
+
+type loadBalancerClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewLoadBalancerClient(cc *grpc.ClientConn) LoadBalancerClient {
+	return &loadBalancerClient{cc}
+}
+
+func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...grpc.CallOption) (LoadBalancer_BalanceLoadClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_LoadBalancer_serviceDesc.Streams[0], c.cc, "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &loadBalancerBalanceLoadClient{stream}
+	return x, nil
+}
+
+type LoadBalancer_BalanceLoadClient interface {
+	Send(*LoadBalanceRequest) error
+	Recv() (*LoadBalanceResponse, error)
+	grpc.ClientStream
+}
+
+type loadBalancerBalanceLoadClient struct {
+	grpc.ClientStream
+}
+
+func (x *loadBalancerBalanceLoadClient) Send(m *LoadBalanceRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *loadBalancerBalanceLoadClient) Recv() (*LoadBalanceResponse, error) {
+	m := new(LoadBalanceResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for LoadBalancer service
+
+type LoadBalancerServer interface {
+	// Bidirectional rpc to get a list of servers.
+	BalanceLoad(LoadBalancer_BalanceLoadServer) error
+}
+
+func RegisterLoadBalancerServer(s *grpc.Server, srv LoadBalancerServer) {
+	s.RegisterService(&_LoadBalancer_serviceDesc, srv)
+}
+
+func _LoadBalancer_BalanceLoad_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(LoadBalancerServer).BalanceLoad(&loadBalancerBalanceLoadServer{stream})
+}
+
+type LoadBalancer_BalanceLoadServer interface {
+	Send(*LoadBalanceResponse) error
+	Recv() (*LoadBalanceRequest, error)
+	grpc.ServerStream
+}
+
+type loadBalancerBalanceLoadServer struct {
+	grpc.ServerStream
+}
+
+func (x *loadBalancerBalanceLoadServer) Send(m *LoadBalanceResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *loadBalancerBalanceLoadServer) Recv() (*LoadBalanceRequest, error) {
+	m := new(LoadBalanceRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _LoadBalancer_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.lb.v1.LoadBalancer",
+	HandlerType: (*LoadBalancerServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "BalanceLoad",
+			Handler:       _LoadBalancer_BalanceLoad_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "grpclb.proto",
+}
+
+func init() { proto.RegisterFile("grpclb.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 471 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x8c, 0x93, 0x51, 0x6f, 0xd3, 0x3e,
+	0x14, 0xc5, 0x9b, 0x7f, 0xb7, 0xfd, 0xb7, 0x9b, 0xc0, 0xc6, 0xdd, 0x54, 0xda, 0x32, 0x8d, 0x2a,
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+	0x1b, 0x94, 0x7d, 0x0c, 0x47, 0x36, 0xf5, 0xcb, 0x01, 0xbe, 0x82, 0xa4, 0xac, 0x05, 0x49, 0xc7,
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+	0x8b, 0xc9, 0x26, 0xc7, 0x03, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.proto b/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.proto
new file mode 100644
index 00000000000..13219c6f843
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.proto
@@ -0,0 +1,109 @@
+syntax = "proto3";
+
+package grpc.lb.v1;
+
+message Duration {
+  // Signed seconds of the span of time. Must be from -315,576,000,000
+  // to +315,576,000,000 inclusive.
+  int64 seconds = 1;
+
+  // Signed fractions of a second at nanosecond resolution of the span
+  // of time. Durations less than one second are represented with a 0
+  // `seconds` field and a positive or negative `nanos` field. For durations
+  // of one second or more, a non-zero value for the `nanos` field must be
+  // of the same sign as the `seconds` field. Must be from -999,999,999
+  // to +999,999,999 inclusive.
+  int32 nanos = 2;
+}
+
+service LoadBalancer {
+  // Bidirectional rpc to get a list of servers.
+  rpc BalanceLoad(stream LoadBalanceRequest)
+      returns (stream LoadBalanceResponse);
+}
+
+message LoadBalanceRequest {
+  oneof load_balance_request_type {
+    // This message should be sent on the first request to the load balancer.
+    InitialLoadBalanceRequest initial_request = 1;
+
+    // The client stats should be periodically reported to the load balancer
+    // based on the duration defined in the InitialLoadBalanceResponse.
+    ClientStats client_stats = 2;
+  }
+}
+
+message InitialLoadBalanceRequest {
+  // Name of load balanced service (IE, service.grpc.gslb.google.com)
+  string name = 1;
+}
+
+// Contains client level statistics that are useful to load balancing. Each
+// count should be reset to zero after reporting the stats.
+message ClientStats {
+  // The total number of requests sent by the client since the last report.
+  int64 total_requests = 1;
+
+  // The number of client rpc errors since the last report.
+  int64 client_rpc_errors = 2;
+
+  // The number of dropped requests since the last report.
+  int64 dropped_requests = 3;
+}
+
+message LoadBalanceResponse {
+  oneof load_balance_response_type {
+    // This message should be sent on the first response to the client.
+    InitialLoadBalanceResponse initial_response = 1;
+
+    // Contains the list of servers selected by the load balancer. The client
+    // should send requests to these servers in the specified order.
+    ServerList server_list = 2;
+  }
+}
+
+message InitialLoadBalanceResponse {
+  // This is an application layer redirect that indicates the client should use
+  // the specified server for load balancing. When this field is non-empty in
+  // the response, the client should open a separate connection to the
+  // load_balancer_delegate and call the BalanceLoad method.
+  string load_balancer_delegate = 1;
+
+  // This interval defines how often the client should send the client stats
+  // to the load balancer. Stats should only be reported when the duration is
+  // positive.
+  Duration client_stats_report_interval = 3;
+}
+
+message ServerList {
+  // Contains a list of servers selected by the load balancer. The list will
+  // be updated when server resolutions change or as needed to balance load
+  // across more servers. The client should consume the server list in order
+  // unless instructed otherwise via the client_config.
+  repeated Server servers = 1;
+
+  // Indicates the amount of time that the client should consider this server
+  // list as valid. It may be considered stale after waiting this interval of
+  // time after receiving the list. If the interval is not positive, the
+  // client can assume the list is valid until the next list is received.
+  Duration expiration_interval = 3;
+}
+
+message Server {
+  // A resolved address for the server, serialized in network-byte-order. It may
+  // either be an IPv4 or IPv6 address.
+  bytes ip_address = 1;
+
+  // A resolved port number for the server.
+  int32 port = 2;
+
+  // An opaque but printable token given to the frontend for each pick. All
+  // frontend requests for that pick must include the token in its initial
+  // metadata. The token is used by the backend to verify the request and to
+  // allow the backend to report load to the gRPC LB system.
+  string load_balance_token = 3;
+
+  // Indicates whether this particular request should be dropped by the client
+  // when this server is chosen from the list.
+  bool drop_request = 4;
+}
diff --git a/vendor/google.golang.org/grpc/grpclb/grpclb.go b/vendor/google.golang.org/grpc/grpclb/grpclb.go
new file mode 100644
index 00000000000..b699a525ae7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclb/grpclb.go
@@ -0,0 +1,573 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package grpclb implements the load balancing protocol defined at
+// https://github.com/grpc/grpc/blob/master/doc/load-balancing.md.
+// The implementation is currently EXPERIMENTAL.
+package grpclb
+
+import (
+	"errors"
+	"fmt"
+	"math/rand"
+	"net"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/naming"
+)
+
+// AddressType indicates the address type returned by name resolution.
+type AddressType uint8
+
+const (
+	// Backend indicates the server is a backend server.
+	Backend AddressType = iota
+	// GRPCLB indicates the server is a grpclb load balancer.
+	GRPCLB
+)
+
+// Metadata contains the information the name resolution for grpclb should provide. The
+// name resolver used by grpclb balancer is required to provide this type of metadata in
+// its address updates.
+type Metadata struct {
+	// AddrType is the type of server (grpc load balancer or backend).
+	AddrType AddressType
+	// ServerName is the name of the grpc load balancer. Used for authentication.
+	ServerName string
+}
+
+// Balancer creates a grpclb load balancer.
+func Balancer(r naming.Resolver) grpc.Balancer {
+	return &balancer{
+		r: r,
+	}
+}
+
+type remoteBalancerInfo struct {
+	addr string
+	// the server name used for authentication with the remote LB server.
+	name string
+}
+
+// addrInfo consists of the information of a backend server.
+type addrInfo struct {
+	addr      grpc.Address
+	connected bool
+	// dropRequest indicates whether a particular RPC which chooses this address
+	// should be dropped.
+	dropRequest bool
+}
+
+type balancer struct {
+	r        naming.Resolver
+	target   string
+	mu       sync.Mutex
+	seq      int // a sequence number to make sure addrCh does not get stale addresses.
+	w        naming.Watcher
+	addrCh   chan []grpc.Address
+	rbs      []remoteBalancerInfo
+	addrs    []*addrInfo
+	next     int
+	waitCh   chan struct{}
+	done     bool
+	expTimer *time.Timer
+	rand     *rand.Rand
+}
+
+func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan remoteBalancerInfo) error {
+	updates, err := w.Next()
+	if err != nil {
+		return err
+	}
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if b.done {
+		return grpc.ErrClientConnClosing
+	}
+	var bAddr remoteBalancerInfo
+	if len(b.rbs) > 0 {
+		bAddr = b.rbs[0]
+	}
+	for _, update := range updates {
+		switch update.Op {
+		case naming.Add:
+			var exist bool
+			for _, v := range b.rbs {
+				// TODO: Is the same addr with different server name a different balancer?
+				if update.Addr == v.addr {
+					exist = true
+					break
+				}
+			}
+			if exist {
+				continue
+			}
+			md, ok := update.Metadata.(*Metadata)
+			if !ok {
+				// TODO: Revisit the handling here and may introduce some fallback mechanism.
+				grpclog.Printf("The name resolution contains unexpected metadata %v", update.Metadata)
+				continue
+			}
+			switch md.AddrType {
+			case Backend:
+				// TODO: Revisit the handling here and may introduce some fallback mechanism.
+				grpclog.Printf("The name resolution does not give grpclb addresses")
+				continue
+			case GRPCLB:
+				b.rbs = append(b.rbs, remoteBalancerInfo{
+					addr: update.Addr,
+					name: md.ServerName,
+				})
+			default:
+				grpclog.Printf("Received unknow address type %d", md.AddrType)
+				continue
+			}
+		case naming.Delete:
+			for i, v := range b.rbs {
+				if update.Addr == v.addr {
+					copy(b.rbs[i:], b.rbs[i+1:])
+					b.rbs = b.rbs[:len(b.rbs)-1]
+					break
+				}
+			}
+		default:
+			grpclog.Println("Unknown update.Op ", update.Op)
+		}
+	}
+	// TODO: Fall back to the basic round-robin load balancing if the resulting address is
+	// not a load balancer.
+	if len(b.rbs) > 0 {
+		// For simplicity, always use the first one now. May revisit this decision later.
+		if b.rbs[0] != bAddr {
+			select {
+			case <-ch:
+			default:
+			}
+			// Pick a random one from the list, instead of always using the first one.
+			if l := len(b.rbs); l > 1 {
+				tmpIdx := b.rand.Intn(l - 1)
+				b.rbs[0], b.rbs[tmpIdx] = b.rbs[tmpIdx], b.rbs[0]
+			}
+			ch <- b.rbs[0]
+		}
+	}
+	return nil
+}
+
+func (b *balancer) serverListExpire(seq int) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	// TODO: gRPC interanls do not clear the connections when the server list is stale.
+	// This means RPCs will keep using the existing server list until b receives new
+	// server list even though the list is expired. Revisit this behavior later.
+	if b.done || seq < b.seq {
+		return
+	}
+	b.next = 0
+	b.addrs = nil
+	// Ask grpc internals to close all the corresponding connections.
+	b.addrCh <- nil
+}
+
+func convertDuration(d *lbpb.Duration) time.Duration {
+	if d == nil {
+		return 0
+	}
+	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
+}
+
+func (b *balancer) processServerList(l *lbpb.ServerList, seq int) {
+	if l == nil {
+		return
+	}
+	servers := l.GetServers()
+	expiration := convertDuration(l.GetExpirationInterval())
+	var (
+		sl    []*addrInfo
+		addrs []grpc.Address
+	)
+	for _, s := range servers {
+		md := metadata.Pairs("lb-token", s.LoadBalanceToken)
+		addr := grpc.Address{
+			Addr:     fmt.Sprintf("%s:%d", net.IP(s.IpAddress), s.Port),
+			Metadata: &md,
+		}
+		sl = append(sl, &addrInfo{
+			addr:        addr,
+			dropRequest: s.DropRequest,
+		})
+		addrs = append(addrs, addr)
+	}
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if b.done || seq < b.seq {
+		return
+	}
+	if len(sl) > 0 {
+		// reset b.next to 0 when replacing the server list.
+		b.next = 0
+		b.addrs = sl
+		b.addrCh <- addrs
+		if b.expTimer != nil {
+			b.expTimer.Stop()
+			b.expTimer = nil
+		}
+		if expiration > 0 {
+			b.expTimer = time.AfterFunc(expiration, func() {
+				b.serverListExpire(seq)
+			})
+		}
+	}
+	return
+}
+
+func (b *balancer) callRemoteBalancer(lbc lbpb.LoadBalancerClient, seq int) (retry bool) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	stream, err := lbc.BalanceLoad(ctx, grpc.FailFast(false))
+	if err != nil {
+		grpclog.Printf("Failed to perform RPC to the remote balancer %v", err)
+		return
+	}
+	b.mu.Lock()
+	if b.done {
+		b.mu.Unlock()
+		return
+	}
+	b.mu.Unlock()
+	initReq := &lbpb.LoadBalanceRequest{
+		LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
+			InitialRequest: &lbpb.InitialLoadBalanceRequest{
+				Name: b.target,
+			},
+		},
+	}
+	if err := stream.Send(initReq); err != nil {
+		// TODO: backoff on retry?
+		return true
+	}
+	reply, err := stream.Recv()
+	if err != nil {
+		// TODO: backoff on retry?
+		return true
+	}
+	initResp := reply.GetInitialResponse()
+	if initResp == nil {
+		grpclog.Println("Failed to receive the initial response from the remote balancer.")
+		return
+	}
+	// TODO: Support delegation.
+	if initResp.LoadBalancerDelegate != "" {
+		// delegation
+		grpclog.Println("TODO: Delegation is not supported yet.")
+		return
+	}
+	// Retrieve the server list.
+	for {
+		reply, err := stream.Recv()
+		if err != nil {
+			break
+		}
+		b.mu.Lock()
+		if b.done || seq < b.seq {
+			b.mu.Unlock()
+			return
+		}
+		b.seq++ // tick when receiving a new list of servers.
+		seq = b.seq
+		b.mu.Unlock()
+		if serverList := reply.GetServerList(); serverList != nil {
+			b.processServerList(serverList, seq)
+		}
+	}
+	return true
+}
+
+func (b *balancer) Start(target string, config grpc.BalancerConfig) error {
+	b.rand = rand.New(rand.NewSource(time.Now().Unix()))
+	// TODO: Fall back to the basic direct connection if there is no name resolver.
+	if b.r == nil {
+		return errors.New("there is no name resolver installed")
+	}
+	b.target = target
+	b.mu.Lock()
+	if b.done {
+		b.mu.Unlock()
+		return grpc.ErrClientConnClosing
+	}
+	b.addrCh = make(chan []grpc.Address)
+	w, err := b.r.Resolve(target)
+	if err != nil {
+		b.mu.Unlock()
+		return err
+	}
+	b.w = w
+	b.mu.Unlock()
+	balancerAddrCh := make(chan remoteBalancerInfo, 1)
+	// Spawn a goroutine to monitor the name resolution of remote load balancer.
+	go func() {
+		for {
+			if err := b.watchAddrUpdates(w, balancerAddrCh); err != nil {
+				grpclog.Printf("grpc: the naming watcher stops working due to %v.\n", err)
+				close(balancerAddrCh)
+				return
+			}
+		}
+	}()
+	// Spawn a goroutine to talk to the remote load balancer.
+	go func() {
+		var cc *grpc.ClientConn
+		for {
+			rb, ok := <-balancerAddrCh
+			if cc != nil {
+				cc.Close()
+			}
+			if !ok {
+				// b is closing.
+				return
+			}
+			// Talk to the remote load balancer to get the server list.
+			var err error
+			creds := config.DialCreds
+			if creds == nil {
+				cc, err = grpc.Dial(rb.addr, grpc.WithInsecure())
+			} else {
+				if rb.name != "" {
+					if err := creds.OverrideServerName(rb.name); err != nil {
+						grpclog.Printf("Failed to override the server name in the credentials: %v", err)
+						continue
+					}
+				}
+				cc, err = grpc.Dial(rb.addr, grpc.WithTransportCredentials(creds))
+			}
+			if err != nil {
+				grpclog.Printf("Failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
+				return
+			}
+			b.mu.Lock()
+			b.seq++ // tick when getting a new balancer address
+			seq := b.seq
+			b.next = 0
+			b.mu.Unlock()
+			go func(cc *grpc.ClientConn) {
+				lbc := lbpb.NewLoadBalancerClient(cc)
+				for {
+					if retry := b.callRemoteBalancer(lbc, seq); !retry {
+						cc.Close()
+						return
+					}
+				}
+			}(cc)
+		}
+	}()
+	return nil
+}
+
+func (b *balancer) down(addr grpc.Address, err error) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	for _, a := range b.addrs {
+		if addr == a.addr {
+			a.connected = false
+			break
+		}
+	}
+}
+
+func (b *balancer) Up(addr grpc.Address) func(error) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if b.done {
+		return nil
+	}
+	var cnt int
+	for _, a := range b.addrs {
+		if a.addr == addr {
+			if a.connected {
+				return nil
+			}
+			a.connected = true
+		}
+		if a.connected && !a.dropRequest {
+			cnt++
+		}
+	}
+	// addr is the only one which is connected. Notify the Get() callers who are blocking.
+	if cnt == 1 && b.waitCh != nil {
+		close(b.waitCh)
+		b.waitCh = nil
+	}
+	return func(err error) {
+		b.down(addr, err)
+	}
+}
+
+func (b *balancer) Get(ctx context.Context, opts grpc.BalancerGetOptions) (addr grpc.Address, put func(), err error) {
+	var ch chan struct{}
+	b.mu.Lock()
+	if b.done {
+		b.mu.Unlock()
+		err = grpc.ErrClientConnClosing
+		return
+	}
+
+	if len(b.addrs) > 0 {
+		if b.next >= len(b.addrs) {
+			b.next = 0
+		}
+		next := b.next
+		for {
+			a := b.addrs[next]
+			next = (next + 1) % len(b.addrs)
+			if a.connected {
+				if !a.dropRequest {
+					addr = a.addr
+					b.next = next
+					b.mu.Unlock()
+					return
+				}
+				if !opts.BlockingWait {
+					b.next = next
+					b.mu.Unlock()
+					err = grpc.Errorf(codes.Unavailable, "%s drops requests", a.addr.Addr)
+					return
+				}
+			}
+			if next == b.next {
+				// Has iterated all the possible address but none is connected.
+				break
+			}
+		}
+	}
+	if !opts.BlockingWait {
+		if len(b.addrs) == 0 {
+			b.mu.Unlock()
+			err = grpc.Errorf(codes.Unavailable, "there is no address available")
+			return
+		}
+		// Returns the next addr on b.addrs for a failfast RPC.
+		addr = b.addrs[b.next].addr
+		b.next++
+		b.mu.Unlock()
+		return
+	}
+	// Wait on b.waitCh for non-failfast RPCs.
+	if b.waitCh == nil {
+		ch = make(chan struct{})
+		b.waitCh = ch
+	} else {
+		ch = b.waitCh
+	}
+	b.mu.Unlock()
+	for {
+		select {
+		case <-ctx.Done():
+			err = ctx.Err()
+			return
+		case <-ch:
+			b.mu.Lock()
+			if b.done {
+				b.mu.Unlock()
+				err = grpc.ErrClientConnClosing
+				return
+			}
+
+			if len(b.addrs) > 0 {
+				if b.next >= len(b.addrs) {
+					b.next = 0
+				}
+				next := b.next
+				for {
+					a := b.addrs[next]
+					next = (next + 1) % len(b.addrs)
+					if a.connected {
+						if !a.dropRequest {
+							addr = a.addr
+							b.next = next
+							b.mu.Unlock()
+							return
+						}
+						if !opts.BlockingWait {
+							b.next = next
+							b.mu.Unlock()
+							err = grpc.Errorf(codes.Unavailable, "drop requests for the addreess %s", a.addr.Addr)
+							return
+						}
+					}
+					if next == b.next {
+						// Has iterated all the possible address but none is connected.
+						break
+					}
+				}
+			}
+			// The newly added addr got removed by Down() again.
+			if b.waitCh == nil {
+				ch = make(chan struct{})
+				b.waitCh = ch
+			} else {
+				ch = b.waitCh
+			}
+			b.mu.Unlock()
+		}
+	}
+}
+
+func (b *balancer) Notify() <-chan []grpc.Address {
+	return b.addrCh
+}
+
+func (b *balancer) Close() error {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	b.done = true
+	if b.expTimer != nil {
+		b.expTimer.Stop()
+	}
+	if b.waitCh != nil {
+		close(b.waitCh)
+	}
+	if b.addrCh != nil {
+		close(b.addrCh)
+	}
+	if b.w != nil {
+		b.w.Close()
+	}
+	return nil
+}
diff --git a/vendor/google.golang.org/grpc/grpclb/grpclb_test.go b/vendor/google.golang.org/grpc/grpclb/grpclb_test.go
new file mode 100644
index 00000000000..2a62a87f526
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclb/grpclb_test.go
@@ -0,0 +1,541 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpclb
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	hwpb "google.golang.org/grpc/examples/helloworld/helloworld"
+	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/naming"
+)
+
+var (
+	lbsn    = "bar.com"
+	besn    = "foo.com"
+	lbToken = "iamatoken"
+)
+
+type testWatcher struct {
+	// the channel to receives name resolution updates
+	update chan *naming.Update
+	// the side channel to get to know how many updates in a batch
+	side chan int
+	// the channel to notifiy update injector that the update reading is done
+	readDone chan int
+}
+
+func (w *testWatcher) Next() (updates []*naming.Update, err error) {
+	n, ok := <-w.side
+	if !ok {
+		return nil, fmt.Errorf("w.side is closed")
+	}
+	for i := 0; i < n; i++ {
+		u, ok := <-w.update
+		if !ok {
+			break
+		}
+		if u != nil {
+			updates = append(updates, u)
+		}
+	}
+	w.readDone <- 0
+	return
+}
+
+func (w *testWatcher) Close() {
+}
+
+// Inject naming resolution updates to the testWatcher.
+func (w *testWatcher) inject(updates []*naming.Update) {
+	w.side <- len(updates)
+	for _, u := range updates {
+		w.update <- u
+	}
+	<-w.readDone
+}
+
+type testNameResolver struct {
+	w    *testWatcher
+	addr string
+}
+
+func (r *testNameResolver) Resolve(target string) (naming.Watcher, error) {
+	r.w = &testWatcher{
+		update:   make(chan *naming.Update, 1),
+		side:     make(chan int, 1),
+		readDone: make(chan int),
+	}
+	r.w.side <- 1
+	r.w.update <- &naming.Update{
+		Op:   naming.Add,
+		Addr: r.addr,
+		Metadata: &Metadata{
+			AddrType:   GRPCLB,
+			ServerName: lbsn,
+		},
+	}
+	go func() {
+		<-r.w.readDone
+	}()
+	return r.w, nil
+}
+
+type serverNameCheckCreds struct {
+	expected string
+	sn       string
+}
+
+func (c *serverNameCheckCreds) ServerHandshake(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	if _, err := io.WriteString(rawConn, c.sn); err != nil {
+		fmt.Printf("Failed to write the server name %s to the client %v", c.sn, err)
+		return nil, nil, err
+	}
+	return rawConn, nil, nil
+}
+func (c *serverNameCheckCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	b := make([]byte, len(c.expected))
+	if _, err := rawConn.Read(b); err != nil {
+		fmt.Printf("Failed to read the server name from the server %v", err)
+		return nil, nil, err
+	}
+	if c.expected != string(b) {
+		fmt.Printf("Read the server name %s want %s", string(b), c.expected)
+		return nil, nil, errors.New("received unexpected server name")
+	}
+	return rawConn, nil, nil
+}
+func (c *serverNameCheckCreds) Info() credentials.ProtocolInfo {
+	return credentials.ProtocolInfo{}
+}
+func (c *serverNameCheckCreds) Clone() credentials.TransportCredentials {
+	return &serverNameCheckCreds{
+		expected: c.expected,
+	}
+}
+func (c *serverNameCheckCreds) OverrideServerName(s string) error {
+	c.expected = s
+	return nil
+}
+
+type remoteBalancer struct {
+	sls       []*lbpb.ServerList
+	intervals []time.Duration
+	done      chan struct{}
+}
+
+func newRemoteBalancer(sls []*lbpb.ServerList, intervals []time.Duration) *remoteBalancer {
+	return &remoteBalancer{
+		sls:       sls,
+		intervals: intervals,
+		done:      make(chan struct{}),
+	}
+}
+
+func (b *remoteBalancer) stop() {
+	close(b.done)
+}
+
+func (b *remoteBalancer) BalanceLoad(stream lbpb.LoadBalancer_BalanceLoadServer) error {
+	req, err := stream.Recv()
+	if err != nil {
+		return err
+	}
+	initReq := req.GetInitialRequest()
+	if initReq.Name != besn {
+		return grpc.Errorf(codes.InvalidArgument, "invalid service name: %v", initReq.Name)
+	}
+	resp := &lbpb.LoadBalanceResponse{
+		LoadBalanceResponseType: &lbpb.LoadBalanceResponse_InitialResponse{
+			InitialResponse: new(lbpb.InitialLoadBalanceResponse),
+		},
+	}
+	if err := stream.Send(resp); err != nil {
+		return err
+	}
+	for k, v := range b.sls {
+		time.Sleep(b.intervals[k])
+		resp = &lbpb.LoadBalanceResponse{
+			LoadBalanceResponseType: &lbpb.LoadBalanceResponse_ServerList{
+				ServerList: v,
+			},
+		}
+		if err := stream.Send(resp); err != nil {
+			return err
+		}
+	}
+	<-b.done
+	return nil
+}
+
+type helloServer struct {
+}
+
+func (s *helloServer) SayHello(ctx context.Context, in *hwpb.HelloRequest) (*hwpb.HelloReply, error) {
+	md, ok := metadata.FromContext(ctx)
+	if !ok {
+		return nil, grpc.Errorf(codes.Internal, "failed to receive metadata")
+	}
+	if md == nil || md["lb-token"][0] != lbToken {
+		return nil, grpc.Errorf(codes.Internal, "received unexpected metadata: %v", md)
+	}
+	return &hwpb.HelloReply{
+		Message: "Hello " + in.Name,
+	}, nil
+}
+
+func startBackends(t *testing.T, sn string, lis ...net.Listener) (servers []*grpc.Server) {
+	for _, l := range lis {
+		creds := &serverNameCheckCreds{
+			sn: sn,
+		}
+		s := grpc.NewServer(grpc.Creds(creds))
+		hwpb.RegisterGreeterServer(s, &helloServer{})
+		servers = append(servers, s)
+		go func(s *grpc.Server, l net.Listener) {
+			s.Serve(l)
+		}(s, l)
+	}
+	return
+}
+
+func stopBackends(servers []*grpc.Server) {
+	for _, s := range servers {
+		s.Stop()
+	}
+}
+
+func TestGRPCLB(t *testing.T) {
+	// Start a backend.
+	beLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen %v", err)
+	}
+	beAddr := strings.Split(beLis.Addr().String(), ":")
+	bePort, err := strconv.Atoi(beAddr[1])
+	backends := startBackends(t, besn, beLis)
+	defer stopBackends(backends)
+
+	// Start a load balancer.
+	lbLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to create the listener for the load balancer %v", err)
+	}
+	lbCreds := &serverNameCheckCreds{
+		sn: lbsn,
+	}
+	lb := grpc.NewServer(grpc.Creds(lbCreds))
+	if err != nil {
+		t.Fatalf("Failed to generate the port number %v", err)
+	}
+	be := &lbpb.Server{
+		IpAddress:        beLis.Addr().(*net.TCPAddr).IP,
+		Port:             int32(bePort),
+		LoadBalanceToken: lbToken,
+	}
+	var bes []*lbpb.Server
+	bes = append(bes, be)
+	sl := &lbpb.ServerList{
+		Servers: bes,
+	}
+	sls := []*lbpb.ServerList{sl}
+	intervals := []time.Duration{0}
+	ls := newRemoteBalancer(sls, intervals)
+	lbpb.RegisterLoadBalancerServer(lb, ls)
+	go func() {
+		lb.Serve(lbLis)
+	}()
+	defer func() {
+		ls.stop()
+		lb.Stop()
+	}()
+	creds := serverNameCheckCreds{
+		expected: besn,
+	}
+	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+	cc, err := grpc.DialContext(ctx, besn, grpc.WithBalancer(Balancer(&testNameResolver{
+		addr: lbLis.Addr().String(),
+	})), grpc.WithBlock(), grpc.WithTransportCredentials(&creds))
+	if err != nil {
+		t.Fatalf("Failed to dial to the backend %v", err)
+	}
+	helloC := hwpb.NewGreeterClient(cc)
+	if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}); err != nil {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, <nil>", helloC, err)
+	}
+	cc.Close()
+}
+
+func TestDropRequest(t *testing.T) {
+	// Start 2 backends.
+	beLis1, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen %v", err)
+	}
+	beAddr1 := strings.Split(beLis1.Addr().String(), ":")
+	bePort1, err := strconv.Atoi(beAddr1[1])
+
+	beLis2, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen %v", err)
+	}
+	beAddr2 := strings.Split(beLis2.Addr().String(), ":")
+	bePort2, err := strconv.Atoi(beAddr2[1])
+
+	backends := startBackends(t, besn, beLis1, beLis2)
+	defer stopBackends(backends)
+
+	// Start a load balancer.
+	lbLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to create the listener for the load balancer %v", err)
+	}
+	lbCreds := &serverNameCheckCreds{
+		sn: lbsn,
+	}
+	lb := grpc.NewServer(grpc.Creds(lbCreds))
+	if err != nil {
+		t.Fatalf("Failed to generate the port number %v", err)
+	}
+	sls := []*lbpb.ServerList{{
+		Servers: []*lbpb.Server{{
+			IpAddress:        beLis1.Addr().(*net.TCPAddr).IP,
+			Port:             int32(bePort1),
+			LoadBalanceToken: lbToken,
+			DropRequest:      true,
+		}, {
+			IpAddress:        beLis2.Addr().(*net.TCPAddr).IP,
+			Port:             int32(bePort2),
+			LoadBalanceToken: lbToken,
+			DropRequest:      false,
+		}},
+	}}
+	intervals := []time.Duration{0}
+	ls := newRemoteBalancer(sls, intervals)
+	lbpb.RegisterLoadBalancerServer(lb, ls)
+	go func() {
+		lb.Serve(lbLis)
+	}()
+	defer func() {
+		ls.stop()
+		lb.Stop()
+	}()
+	creds := serverNameCheckCreds{
+		expected: besn,
+	}
+	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+	cc, err := grpc.DialContext(ctx, besn, grpc.WithBalancer(Balancer(&testNameResolver{
+		addr: lbLis.Addr().String(),
+	})), grpc.WithBlock(), grpc.WithTransportCredentials(&creds))
+	if err != nil {
+		t.Fatalf("Failed to dial to the backend %v", err)
+	}
+	helloC := hwpb.NewGreeterClient(cc)
+	// The 1st, non-fail-fast RPC should succeed.  This ensures both server
+	// connections are made, because the first one has DropRequest set to true.
+	if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, <nil>", helloC, err)
+	}
+	for i := 0; i < 3; i++ {
+		// Odd fail-fast RPCs should fail, because the 1st backend has DropRequest
+		// set to true.
+		if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}); grpc.Code(err) != codes.Unavailable {
+			t.Fatalf("%v.SayHello(_, _) = _, %v, want _, %s", helloC, err, codes.Unavailable)
+		}
+		// Even fail-fast RPCs should succeed since they choose the
+		// non-drop-request backend according to the round robin policy.
+		if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}); err != nil {
+			t.Fatalf("%v.SayHello(_, _) = _, %v, want _, <nil>", helloC, err)
+		}
+	}
+	cc.Close()
+}
+
+func TestDropRequestFailedNonFailFast(t *testing.T) {
+	// Start a backend.
+	beLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen %v", err)
+	}
+	beAddr := strings.Split(beLis.Addr().String(), ":")
+	bePort, err := strconv.Atoi(beAddr[1])
+	backends := startBackends(t, besn, beLis)
+	defer stopBackends(backends)
+
+	// Start a load balancer.
+	lbLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to create the listener for the load balancer %v", err)
+	}
+	lbCreds := &serverNameCheckCreds{
+		sn: lbsn,
+	}
+	lb := grpc.NewServer(grpc.Creds(lbCreds))
+	if err != nil {
+		t.Fatalf("Failed to generate the port number %v", err)
+	}
+	be := &lbpb.Server{
+		IpAddress:        beLis.Addr().(*net.TCPAddr).IP,
+		Port:             int32(bePort),
+		LoadBalanceToken: lbToken,
+		DropRequest:      true,
+	}
+	var bes []*lbpb.Server
+	bes = append(bes, be)
+	sl := &lbpb.ServerList{
+		Servers: bes,
+	}
+	sls := []*lbpb.ServerList{sl}
+	intervals := []time.Duration{0}
+	ls := newRemoteBalancer(sls, intervals)
+	lbpb.RegisterLoadBalancerServer(lb, ls)
+	go func() {
+		lb.Serve(lbLis)
+	}()
+	defer func() {
+		ls.stop()
+		lb.Stop()
+	}()
+	creds := serverNameCheckCreds{
+		expected: besn,
+	}
+	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+	cc, err := grpc.DialContext(ctx, besn, grpc.WithBalancer(Balancer(&testNameResolver{
+		addr: lbLis.Addr().String(),
+	})), grpc.WithBlock(), grpc.WithTransportCredentials(&creds))
+	if err != nil {
+		t.Fatalf("Failed to dial to the backend %v", err)
+	}
+	helloC := hwpb.NewGreeterClient(cc)
+	ctx, _ = context.WithTimeout(context.Background(), 10*time.Millisecond)
+	if _, err := helloC.SayHello(ctx, &hwpb.HelloRequest{Name: "grpc"}, grpc.FailFast(false)); grpc.Code(err) != codes.DeadlineExceeded {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, %s", helloC, err, codes.DeadlineExceeded)
+	}
+	cc.Close()
+}
+
+func TestServerExpiration(t *testing.T) {
+	// Start a backend.
+	beLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen %v", err)
+	}
+	beAddr := strings.Split(beLis.Addr().String(), ":")
+	bePort, err := strconv.Atoi(beAddr[1])
+	backends := startBackends(t, besn, beLis)
+	defer stopBackends(backends)
+
+	// Start a load balancer.
+	lbLis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to create the listener for the load balancer %v", err)
+	}
+	lbCreds := &serverNameCheckCreds{
+		sn: lbsn,
+	}
+	lb := grpc.NewServer(grpc.Creds(lbCreds))
+	if err != nil {
+		t.Fatalf("Failed to generate the port number %v", err)
+	}
+	be := &lbpb.Server{
+		IpAddress:        beLis.Addr().(*net.TCPAddr).IP,
+		Port:             int32(bePort),
+		LoadBalanceToken: lbToken,
+	}
+	var bes []*lbpb.Server
+	bes = append(bes, be)
+	exp := &lbpb.Duration{
+		Seconds: 0,
+		Nanos:   100000000, // 100ms
+	}
+	var sls []*lbpb.ServerList
+	sl := &lbpb.ServerList{
+		Servers:            bes,
+		ExpirationInterval: exp,
+	}
+	sls = append(sls, sl)
+	sl = &lbpb.ServerList{
+		Servers: bes,
+	}
+	sls = append(sls, sl)
+	var intervals []time.Duration
+	intervals = append(intervals, 0)
+	intervals = append(intervals, 500*time.Millisecond)
+	ls := newRemoteBalancer(sls, intervals)
+	lbpb.RegisterLoadBalancerServer(lb, ls)
+	go func() {
+		lb.Serve(lbLis)
+	}()
+	defer func() {
+		ls.stop()
+		lb.Stop()
+	}()
+	creds := serverNameCheckCreds{
+		expected: besn,
+	}
+	ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
+	cc, err := grpc.DialContext(ctx, besn, grpc.WithBalancer(Balancer(&testNameResolver{
+		addr: lbLis.Addr().String(),
+	})), grpc.WithBlock(), grpc.WithTransportCredentials(&creds))
+	if err != nil {
+		t.Fatalf("Failed to dial to the backend %v", err)
+	}
+	helloC := hwpb.NewGreeterClient(cc)
+	if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}); err != nil {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, <nil>", helloC, err)
+	}
+	// Sleep and wake up when the first server list gets expired.
+	time.Sleep(150 * time.Millisecond)
+	if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, %s", helloC, err, codes.Unavailable)
+	}
+	// A non-failfast rpc should be succeeded after the second server list is received from
+	// the remote load balancer.
+	if _, err := helloC.SayHello(context.Background(), &hwpb.HelloRequest{Name: "grpc"}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.SayHello(_, _) = _, %v, want _, <nil>", helloC, err)
+	}
+	cc.Close()
+}
diff --git a/vendor/google.golang.org/grpc/grpclog/glogger/glogger.go b/vendor/google.golang.org/grpc/grpclog/glogger/glogger.go
new file mode 100644
index 00000000000..43b886cdbdd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclog/glogger/glogger.go
@@ -0,0 +1,74 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+Package glogger defines glog-based logging for grpc.
+*/
+package glogger
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+	"google.golang.org/grpc/grpclog"
+)
+
+func init() {
+	grpclog.SetLogger(&glogger{})
+}
+
+type glogger struct{}
+
+func (g *glogger) Fatal(args ...interface{}) {
+	glog.FatalDepth(2, args...)
+}
+
+func (g *glogger) Fatalf(format string, args ...interface{}) {
+	glog.FatalDepth(2, fmt.Sprintf(format, args...))
+}
+
+func (g *glogger) Fatalln(args ...interface{}) {
+	glog.FatalDepth(2, fmt.Sprintln(args...))
+}
+
+func (g *glogger) Print(args ...interface{}) {
+	glog.InfoDepth(2, args...)
+}
+
+func (g *glogger) Printf(format string, args ...interface{}) {
+	glog.InfoDepth(2, fmt.Sprintf(format, args...))
+}
+
+func (g *glogger) Println(args ...interface{}) {
+	glog.InfoDepth(2, fmt.Sprintln(args...))
+}
diff --git a/vendor/google.golang.org/grpc/grpclog/logger.go b/vendor/google.golang.org/grpc/grpclog/logger.go
new file mode 100644
index 00000000000..3b2933079e9
--- /dev/null
+++ b/vendor/google.golang.org/grpc/grpclog/logger.go
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+Package grpclog defines logging for grpc.
+*/
+package grpclog // import "google.golang.org/grpc/grpclog"
+
+import (
+	"log"
+	"os"
+)
+
+// Use golang's standard logger by default.
+// Access is not mutex-protected: do not modify except in init()
+// functions.
+var logger Logger = log.New(os.Stderr, "", log.LstdFlags)
+
+// Logger mimics golang's standard Logger as an interface.
+type Logger interface {
+	Fatal(args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Fatalln(args ...interface{})
+	Print(args ...interface{})
+	Printf(format string, args ...interface{})
+	Println(args ...interface{})
+}
+
+// SetLogger sets the logger that is used in grpc. Call only from
+// init() functions.
+func SetLogger(l Logger) {
+	logger = l
+}
+
+// Fatal is equivalent to Print() followed by a call to os.Exit() with a non-zero exit code.
+func Fatal(args ...interface{}) {
+	logger.Fatal(args...)
+}
+
+// Fatalf is equivalent to Printf() followed by a call to os.Exit() with a non-zero exit code.
+func Fatalf(format string, args ...interface{}) {
+	logger.Fatalf(format, args...)
+}
+
+// Fatalln is equivalent to Println() followed by a call to os.Exit()) with a non-zero exit code.
+func Fatalln(args ...interface{}) {
+	logger.Fatalln(args...)
+}
+
+// Print prints to the logger. Arguments are handled in the manner of fmt.Print.
+func Print(args ...interface{}) {
+	logger.Print(args...)
+}
+
+// Printf prints to the logger. Arguments are handled in the manner of fmt.Printf.
+func Printf(format string, args ...interface{}) {
+	logger.Printf(format, args...)
+}
+
+// Println prints to the logger. Arguments are handled in the manner of fmt.Println.
+func Println(args ...interface{}) {
+	logger.Println(args...)
+}
diff --git a/vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go b/vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go
new file mode 100644
index 00000000000..89c4d459f0a
--- /dev/null
+++ b/vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go
@@ -0,0 +1,176 @@
+// Code generated by protoc-gen-go.
+// source: health.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_health_v1 is a generated protocol buffer package.
+
+It is generated from these files:
+	health.proto
+
+It has these top-level messages:
+	HealthCheckRequest
+	HealthCheckResponse
+*/
+package grpc_health_v1
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type HealthCheckResponse_ServingStatus int32
+
+const (
+	HealthCheckResponse_UNKNOWN     HealthCheckResponse_ServingStatus = 0
+	HealthCheckResponse_SERVING     HealthCheckResponse_ServingStatus = 1
+	HealthCheckResponse_NOT_SERVING HealthCheckResponse_ServingStatus = 2
+)
+
+var HealthCheckResponse_ServingStatus_name = map[int32]string{
+	0: "UNKNOWN",
+	1: "SERVING",
+	2: "NOT_SERVING",
+}
+var HealthCheckResponse_ServingStatus_value = map[string]int32{
+	"UNKNOWN":     0,
+	"SERVING":     1,
+	"NOT_SERVING": 2,
+}
+
+func (x HealthCheckResponse_ServingStatus) String() string {
+	return proto.EnumName(HealthCheckResponse_ServingStatus_name, int32(x))
+}
+func (HealthCheckResponse_ServingStatus) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{1, 0}
+}
+
+type HealthCheckRequest struct {
+	Service string `protobuf:"bytes,1,opt,name=service" json:"service,omitempty"`
+}
+
+func (m *HealthCheckRequest) Reset()                    { *m = HealthCheckRequest{} }
+func (m *HealthCheckRequest) String() string            { return proto.CompactTextString(m) }
+func (*HealthCheckRequest) ProtoMessage()               {}
+func (*HealthCheckRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type HealthCheckResponse struct {
+	Status HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
+}
+
+func (m *HealthCheckResponse) Reset()                    { *m = HealthCheckResponse{} }
+func (m *HealthCheckResponse) String() string            { return proto.CompactTextString(m) }
+func (*HealthCheckResponse) ProtoMessage()               {}
+func (*HealthCheckResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func init() {
+	proto.RegisterType((*HealthCheckRequest)(nil), "grpc.health.v1.HealthCheckRequest")
+	proto.RegisterType((*HealthCheckResponse)(nil), "grpc.health.v1.HealthCheckResponse")
+	proto.RegisterEnum("grpc.health.v1.HealthCheckResponse_ServingStatus", HealthCheckResponse_ServingStatus_name, HealthCheckResponse_ServingStatus_value)
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for Health service
+
+type HealthClient interface {
+	Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error)
+}
+
+type healthClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewHealthClient(cc *grpc.ClientConn) HealthClient {
+	return &healthClient{cc}
+}
+
+func (c *healthClient) Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error) {
+	out := new(HealthCheckResponse)
+	err := grpc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Health service
+
+type HealthServer interface {
+	Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
+}
+
+func RegisterHealthServer(s *grpc.Server, srv HealthServer) {
+	s.RegisterService(&_Health_serviceDesc, srv)
+}
+
+func _Health_Check_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HealthCheckRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(HealthServer).Check(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.health.v1.Health/Check",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(HealthServer).Check(ctx, req.(*HealthCheckRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Health_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.health.v1.Health",
+	HandlerType: (*HealthServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Check",
+			Handler:    _Health_Check_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "health.proto",
+}
+
+func init() { proto.RegisterFile("health.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 204 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0xc9, 0x48, 0x4d, 0xcc,
+	0x29, 0xc9, 0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x4b, 0x2f, 0x2a, 0x48, 0xd6, 0x83,
+	0x0a, 0x95, 0x19, 0x2a, 0xe9, 0x71, 0x09, 0x79, 0x80, 0x39, 0xce, 0x19, 0xa9, 0xc9, 0xd9, 0x41,
+	0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x12, 0x5c, 0xec, 0xc5, 0xa9, 0x45, 0x65, 0x99, 0xc9,
+	0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x41, 0x30, 0xae, 0xd2, 0x1c, 0x46, 0x2e, 0x61, 0x14,
+	0x0d, 0xc5, 0x05, 0xf9, 0x79, 0xc5, 0xa9, 0x42, 0x9e, 0x5c, 0x6c, 0xc5, 0x25, 0x89, 0x25, 0xa5,
+	0xc5, 0x60, 0x0d, 0x7c, 0x46, 0x86, 0x7a, 0xa8, 0x16, 0xe9, 0x61, 0xd1, 0xa4, 0x17, 0x0c, 0x32,
+	0x34, 0x2f, 0x3d, 0x18, 0xac, 0x31, 0x08, 0x6a, 0x80, 0x92, 0x15, 0x17, 0x2f, 0x8a, 0x84, 0x10,
+	0x37, 0x17, 0x7b, 0xa8, 0x9f, 0xb7, 0x9f, 0x7f, 0xb8, 0x9f, 0x00, 0x03, 0x88, 0x13, 0xec, 0x1a,
+	0x14, 0xe6, 0xe9, 0xe7, 0x2e, 0xc0, 0x28, 0xc4, 0xcf, 0xc5, 0xed, 0xe7, 0x1f, 0x12, 0x0f, 0x13,
+	0x60, 0x32, 0x8a, 0xe2, 0x62, 0x83, 0x58, 0x24, 0x14, 0xc0, 0xc5, 0x0a, 0xb6, 0x4c, 0x48, 0x09,
+	0xaf, 0x4b, 0xc0, 0xfe, 0x95, 0x52, 0x26, 0xc2, 0xb5, 0x49, 0x6c, 0xe0, 0x10, 0x34, 0x06, 0x04,
+	0x00, 0x00, 0xff, 0xff, 0xac, 0x56, 0x2a, 0xcb, 0x51, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/health/grpc_health_v1/health.proto b/vendor/google.golang.org/grpc/health/grpc_health_v1/health.proto
new file mode 100644
index 00000000000..e2dc0889258
--- /dev/null
+++ b/vendor/google.golang.org/grpc/health/grpc_health_v1/health.proto
@@ -0,0 +1,20 @@
+syntax = "proto3";
+
+package grpc.health.v1;
+
+message HealthCheckRequest {
+  string service = 1;
+}
+
+message HealthCheckResponse {
+  enum ServingStatus {
+ 	UNKNOWN = 0;
+	SERVING = 1;
+	NOT_SERVING = 2;
+  }
+  ServingStatus status = 1;
+}
+
+service Health{
+  rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
+} 
diff --git a/vendor/google.golang.org/grpc/health/health.go b/vendor/google.golang.org/grpc/health/health.go
new file mode 100644
index 00000000000..342552986e2
--- /dev/null
+++ b/vendor/google.golang.org/grpc/health/health.go
@@ -0,0 +1,52 @@
+// Package health provides some utility functions to health-check a server. The implementation
+// is based on protobuf. Users need to write their own implementations if other IDLs are used.
+package health
+
+import (
+	"sync"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+)
+
+// Server implements `service Health`.
+type Server struct {
+	mu sync.Mutex
+	// statusMap stores the serving status of the services this Server monitors.
+	statusMap map[string]healthpb.HealthCheckResponse_ServingStatus
+}
+
+// NewServer returns a new Server.
+func NewServer() *Server {
+	return &Server{
+		statusMap: make(map[string]healthpb.HealthCheckResponse_ServingStatus),
+	}
+}
+
+// Check implements `service Health`.
+func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*healthpb.HealthCheckResponse, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if in.Service == "" {
+		// check the server overall health status.
+		return &healthpb.HealthCheckResponse{
+			Status: healthpb.HealthCheckResponse_SERVING,
+		}, nil
+	}
+	if status, ok := s.statusMap[in.Service]; ok {
+		return &healthpb.HealthCheckResponse{
+			Status: status,
+		}, nil
+	}
+	return nil, grpc.Errorf(codes.NotFound, "unknown service")
+}
+
+// SetServingStatus is called when need to reset the serving status of a service
+// or insert a new service entry into the statusMap.
+func (s *Server) SetServingStatus(service string, status healthpb.HealthCheckResponse_ServingStatus) {
+	s.mu.Lock()
+	s.statusMap[service] = status
+	s.mu.Unlock()
+}
diff --git a/vendor/google.golang.org/grpc/interceptor.go b/vendor/google.golang.org/grpc/interceptor.go
new file mode 100644
index 00000000000..8d932efed7e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interceptor.go
@@ -0,0 +1,90 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"golang.org/x/net/context"
+)
+
+// UnaryInvoker is called by UnaryClientInterceptor to complete RPCs.
+type UnaryInvoker func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error
+
+// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. inovker is the handler to complete the RPC
+// and it is the responsibility of the interceptor to call it.
+// This is the EXPERIMENTAL API.
+type UnaryClientInterceptor func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error
+
+// Streamer is called by StreamClientInterceptor to create a ClientStream.
+type Streamer func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error)
+
+// StreamClientInterceptor intercepts the creation of ClientStream. It may return a custom ClientStream to intercept all I/O
+// operations. streamer is the handlder to create a ClientStream and it is the responsibility of the interceptor to call it.
+// This is the EXPERIMENTAL API.
+type StreamClientInterceptor func(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, streamer Streamer, opts ...CallOption) (ClientStream, error)
+
+// UnaryServerInfo consists of various information about a unary RPC on
+// server side. All per-rpc information may be mutated by the interceptor.
+type UnaryServerInfo struct {
+	// Server is the service implementation the user provides. This is read-only.
+	Server interface{}
+	// FullMethod is the full RPC method string, i.e., /package.service/method.
+	FullMethod string
+}
+
+// UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal
+// execution of a unary RPC.
+type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error)
+
+// UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info
+// contains all the information of this RPC the interceptor can operate on. And handler is the wrapper
+// of the service method implementation. It is the responsibility of the interceptor to invoke handler
+// to complete the RPC.
+type UnaryServerInterceptor func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (resp interface{}, err error)
+
+// StreamServerInfo consists of various information about a streaming RPC on
+// server side. All per-rpc information may be mutated by the interceptor.
+type StreamServerInfo struct {
+	// FullMethod is the full RPC method string, i.e., /package.service/method.
+	FullMethod string
+	// IsClientStream indicates whether the RPC is a client streaming RPC.
+	IsClientStream bool
+	// IsServerStream indicates whether the RPC is a server streaming RPC.
+	IsServerStream bool
+}
+
+// StreamServerInterceptor provides a hook to intercept the execution of a streaming RPC on the server.
+// info contains all the information of this RPC the interceptor can operate on. And handler is the
+// service method implementation. It is the responsibility of the interceptor to invoke handler to
+// complete the RPC.
+type StreamServerInterceptor func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error
diff --git a/vendor/google.golang.org/grpc/internal/internal.go b/vendor/google.golang.org/grpc/internal/internal.go
new file mode 100644
index 00000000000..5489143a85c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/internal/internal.go
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package internal contains gRPC-internal code for testing, to avoid polluting
+// the godoc of the top-level grpc package.
+package internal
+
+// TestingCloseConns closes all existing transports but keeps
+// grpcServer.lis accepting new connections.
+//
+// The provided grpcServer must be of type *grpc.Server. It is untyped
+// for circular dependency reasons.
+var TestingCloseConns func(grpcServer interface{})
+
+// TestingUseHandlerImpl enables the http.Handler-based server implementation.
+// It must be called before Serve and requires TLS credentials.
+//
+// The provided grpcServer must be of type *grpc.Server. It is untyped
+// for circular dependency reasons.
+var TestingUseHandlerImpl func(grpcServer interface{})
diff --git a/vendor/google.golang.org/grpc/interop/client/client.go b/vendor/google.golang.org/grpc/interop/client/client.go
new file mode 100644
index 00000000000..38bad3f66db
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/client/client.go
@@ -0,0 +1,202 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"flag"
+	"net"
+	"strconv"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/oauth"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/interop"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+)
+
+var (
+	useTLS                = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP")
+	testCA                = flag.Bool("use_test_ca", false, "Whether to replace platform root CAs with test CA as the CA root")
+	serviceAccountKeyFile = flag.String("service_account_key_file", "", "Path to service account json key file")
+	oauthScope            = flag.String("oauth_scope", "", "The scope for OAuth2 tokens")
+	defaultServiceAccount = flag.String("default_service_account", "", "Email of GCE default service account")
+	serverHost            = flag.String("server_host", "localhost", "The server host name")
+	serverPort            = flag.Int("server_port", 10000, "The server port number")
+	tlsServerName         = flag.String("server_host_override", "", "The server name use to verify the hostname returned by TLS handshake if it is not empty. Otherwise, --server_host is used.")
+	testCase              = flag.String("test_case", "large_unary",
+		`Configure different test cases. Valid options are:
+        empty_unary : empty (zero bytes) request and response;
+        large_unary : single request and (large) response;
+        client_streaming : request streaming with single response;
+        server_streaming : single request with response streaming;
+        ping_pong : full-duplex streaming;
+        empty_stream : full-duplex streaming with zero message;
+        timeout_on_sleeping_server: fullduplex streaming on a sleeping server;
+        compute_engine_creds: large_unary with compute engine auth;
+        service_account_creds: large_unary with service account auth;
+        jwt_token_creds: large_unary with jwt token auth;
+        per_rpc_creds: large_unary with per rpc token;
+        oauth2_auth_token: large_unary with oauth2 token auth;
+        cancel_after_begin: cancellation after metadata has been sent but before payloads are sent;
+        cancel_after_first_response: cancellation after receiving 1st message from the server;
+        status_code_and_message: status code propagated back to client;
+        custom_metadata: server will echo custom metadata;
+        unimplemented_method: client attempts to call unimplemented method;
+        unimplemented_service: client attempts to call unimplemented service.`)
+
+	// The test CA root cert file
+	testCAFile = "testdata/ca.pem"
+)
+
+func main() {
+	flag.Parse()
+	serverAddr := net.JoinHostPort(*serverHost, strconv.Itoa(*serverPort))
+	var opts []grpc.DialOption
+	if *useTLS {
+		var sn string
+		if *tlsServerName != "" {
+			sn = *tlsServerName
+		}
+		var creds credentials.TransportCredentials
+		if *testCA {
+			var err error
+			creds, err = credentials.NewClientTLSFromFile(testCAFile, sn)
+			if err != nil {
+				grpclog.Fatalf("Failed to create TLS credentials %v", err)
+			}
+		} else {
+			creds = credentials.NewClientTLSFromCert(nil, sn)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+		if *testCase == "compute_engine_creds" {
+			opts = append(opts, grpc.WithPerRPCCredentials(oauth.NewComputeEngine()))
+		} else if *testCase == "service_account_creds" {
+			jwtCreds, err := oauth.NewServiceAccountFromFile(*serviceAccountKeyFile, *oauthScope)
+			if err != nil {
+				grpclog.Fatalf("Failed to create JWT credentials: %v", err)
+			}
+			opts = append(opts, grpc.WithPerRPCCredentials(jwtCreds))
+		} else if *testCase == "jwt_token_creds" {
+			jwtCreds, err := oauth.NewJWTAccessFromFile(*serviceAccountKeyFile)
+			if err != nil {
+				grpclog.Fatalf("Failed to create JWT credentials: %v", err)
+			}
+			opts = append(opts, grpc.WithPerRPCCredentials(jwtCreds))
+		} else if *testCase == "oauth2_auth_token" {
+			opts = append(opts, grpc.WithPerRPCCredentials(oauth.NewOauthAccess(interop.GetToken(*serviceAccountKeyFile, *oauthScope))))
+		}
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+	conn, err := grpc.Dial(serverAddr, opts...)
+	if err != nil {
+		grpclog.Fatalf("Fail to dial: %v", err)
+	}
+	defer conn.Close()
+	tc := testpb.NewTestServiceClient(conn)
+	switch *testCase {
+	case "empty_unary":
+		interop.DoEmptyUnaryCall(tc)
+		grpclog.Println("EmptyUnaryCall done")
+	case "large_unary":
+		interop.DoLargeUnaryCall(tc)
+		grpclog.Println("LargeUnaryCall done")
+	case "client_streaming":
+		interop.DoClientStreaming(tc)
+		grpclog.Println("ClientStreaming done")
+	case "server_streaming":
+		interop.DoServerStreaming(tc)
+		grpclog.Println("ServerStreaming done")
+	case "ping_pong":
+		interop.DoPingPong(tc)
+		grpclog.Println("Pingpong done")
+	case "empty_stream":
+		interop.DoEmptyStream(tc)
+		grpclog.Println("Emptystream done")
+	case "timeout_on_sleeping_server":
+		interop.DoTimeoutOnSleepingServer(tc)
+		grpclog.Println("TimeoutOnSleepingServer done")
+	case "compute_engine_creds":
+		if !*useTLS {
+			grpclog.Fatalf("TLS is not enabled. TLS is required to execute compute_engine_creds test case.")
+		}
+		interop.DoComputeEngineCreds(tc, *defaultServiceAccount, *oauthScope)
+		grpclog.Println("ComputeEngineCreds done")
+	case "service_account_creds":
+		if !*useTLS {
+			grpclog.Fatalf("TLS is not enabled. TLS is required to execute service_account_creds test case.")
+		}
+		interop.DoServiceAccountCreds(tc, *serviceAccountKeyFile, *oauthScope)
+		grpclog.Println("ServiceAccountCreds done")
+	case "jwt_token_creds":
+		if !*useTLS {
+			grpclog.Fatalf("TLS is not enabled. TLS is required to execute jwt_token_creds test case.")
+		}
+		interop.DoJWTTokenCreds(tc, *serviceAccountKeyFile)
+		grpclog.Println("JWTtokenCreds done")
+	case "per_rpc_creds":
+		if !*useTLS {
+			grpclog.Fatalf("TLS is not enabled. TLS is required to execute per_rpc_creds test case.")
+		}
+		interop.DoPerRPCCreds(tc, *serviceAccountKeyFile, *oauthScope)
+		grpclog.Println("PerRPCCreds done")
+	case "oauth2_auth_token":
+		if !*useTLS {
+			grpclog.Fatalf("TLS is not enabled. TLS is required to execute oauth2_auth_token test case.")
+		}
+		interop.DoOauth2TokenCreds(tc, *serviceAccountKeyFile, *oauthScope)
+		grpclog.Println("Oauth2TokenCreds done")
+	case "cancel_after_begin":
+		interop.DoCancelAfterBegin(tc)
+		grpclog.Println("CancelAfterBegin done")
+	case "cancel_after_first_response":
+		interop.DoCancelAfterFirstResponse(tc)
+		grpclog.Println("CancelAfterFirstResponse done")
+	case "status_code_and_message":
+		interop.DoStatusCodeAndMessage(tc)
+		grpclog.Println("StatusCodeAndMessage done")
+	case "custom_metadata":
+		interop.DoCustomMetadata(tc)
+		grpclog.Println("CustomMetadata done")
+	case "unimplemented_method":
+		interop.DoUnimplementedMethod(conn)
+		grpclog.Println("UnimplementedMethod done")
+	case "unimplemented_service":
+		interop.DoUnimplementedService(testpb.NewUnimplementedServiceClient(conn))
+		grpclog.Println("UnimplementedService done")
+	default:
+		grpclog.Fatal("Unsupported test case: ", *testCase)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/interop/client/testdata/ca.pem b/vendor/google.golang.org/grpc/interop/client/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/client/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/interop/client/testdata/server1.key b/vendor/google.golang.org/grpc/interop/client/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/client/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/interop/client/testdata/server1.pem b/vendor/google.golang.org/grpc/interop/client/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/client/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/interop/grpc_testing/test.pb.go b/vendor/google.golang.org/grpc/interop/grpc_testing/test.pb.go
new file mode 100755
index 00000000000..76ae5643abf
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/grpc_testing/test.pb.go
@@ -0,0 +1,906 @@
+// Code generated by protoc-gen-go.
+// source: test.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	test.proto
+
+It has these top-level messages:
+	Empty
+	Payload
+	EchoStatus
+	SimpleRequest
+	SimpleResponse
+	StreamingInputCallRequest
+	StreamingInputCallResponse
+	ResponseParameters
+	StreamingOutputCallRequest
+	StreamingOutputCallResponse
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The type of payload that should be returned.
+type PayloadType int32
+
+const (
+	// Compressable text format.
+	PayloadType_COMPRESSABLE PayloadType = 0
+	// Uncompressable binary format.
+	PayloadType_UNCOMPRESSABLE PayloadType = 1
+	// Randomly chosen from all other formats defined in this enum.
+	PayloadType_RANDOM PayloadType = 2
+)
+
+var PayloadType_name = map[int32]string{
+	0: "COMPRESSABLE",
+	1: "UNCOMPRESSABLE",
+	2: "RANDOM",
+}
+var PayloadType_value = map[string]int32{
+	"COMPRESSABLE":   0,
+	"UNCOMPRESSABLE": 1,
+	"RANDOM":         2,
+}
+
+func (x PayloadType) Enum() *PayloadType {
+	p := new(PayloadType)
+	*p = x
+	return p
+}
+func (x PayloadType) String() string {
+	return proto.EnumName(PayloadType_name, int32(x))
+}
+func (x *PayloadType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(PayloadType_value, data, "PayloadType")
+	if err != nil {
+		return err
+	}
+	*x = PayloadType(value)
+	return nil
+}
+func (PayloadType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type Empty struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Empty) Reset()                    { *m = Empty{} }
+func (m *Empty) String() string            { return proto.CompactTextString(m) }
+func (*Empty) ProtoMessage()               {}
+func (*Empty) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// A block of data, to simply increase gRPC message size.
+type Payload struct {
+	// The type of data in body.
+	Type *PayloadType `protobuf:"varint,1,opt,name=type,enum=grpc.testing.PayloadType" json:"type,omitempty"`
+	// Primary contents of payload.
+	Body             []byte `protobuf:"bytes,2,opt,name=body" json:"body,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Payload) Reset()                    { *m = Payload{} }
+func (m *Payload) String() string            { return proto.CompactTextString(m) }
+func (*Payload) ProtoMessage()               {}
+func (*Payload) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *Payload) GetType() PayloadType {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *Payload) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+// A protobuf representation for grpc status. This is used by test
+// clients to specify a status that the server should attempt to return.
+type EchoStatus struct {
+	Code             *int32  `protobuf:"varint,1,opt,name=code" json:"code,omitempty"`
+	Message          *string `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *EchoStatus) Reset()                    { *m = EchoStatus{} }
+func (m *EchoStatus) String() string            { return proto.CompactTextString(m) }
+func (*EchoStatus) ProtoMessage()               {}
+func (*EchoStatus) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *EchoStatus) GetCode() int32 {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return 0
+}
+
+func (m *EchoStatus) GetMessage() string {
+	if m != nil && m.Message != nil {
+		return *m.Message
+	}
+	return ""
+}
+
+// Unary request.
+type SimpleRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, server randomly chooses one from other formats.
+	ResponseType *PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Desired payload size in the response from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	ResponseSize *int32 `protobuf:"varint,2,opt,name=response_size,json=responseSize" json:"response_size,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	// Whether SimpleResponse should include username.
+	FillUsername *bool `protobuf:"varint,4,opt,name=fill_username,json=fillUsername" json:"fill_username,omitempty"`
+	// Whether SimpleResponse should include OAuth scope.
+	FillOauthScope *bool `protobuf:"varint,5,opt,name=fill_oauth_scope,json=fillOauthScope" json:"fill_oauth_scope,omitempty"`
+	// Whether server should return a given status
+	ResponseStatus   *EchoStatus `protobuf:"bytes,7,opt,name=response_status,json=responseStatus" json:"response_status,omitempty"`
+	XXX_unrecognized []byte      `json:"-"`
+}
+
+func (m *SimpleRequest) Reset()                    { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string            { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()               {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *SimpleRequest) GetResponseType() PayloadType {
+	if m != nil && m.ResponseType != nil {
+		return *m.ResponseType
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *SimpleRequest) GetResponseSize() int32 {
+	if m != nil && m.ResponseSize != nil {
+		return *m.ResponseSize
+	}
+	return 0
+}
+
+func (m *SimpleRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *SimpleRequest) GetFillUsername() bool {
+	if m != nil && m.FillUsername != nil {
+		return *m.FillUsername
+	}
+	return false
+}
+
+func (m *SimpleRequest) GetFillOauthScope() bool {
+	if m != nil && m.FillOauthScope != nil {
+		return *m.FillOauthScope
+	}
+	return false
+}
+
+func (m *SimpleRequest) GetResponseStatus() *EchoStatus {
+	if m != nil {
+		return m.ResponseStatus
+	}
+	return nil
+}
+
+// Unary response, as configured by the request.
+type SimpleResponse struct {
+	// Payload to increase message size.
+	Payload *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	// The user the request came from, for verifying authentication was
+	// successful when the client expected it.
+	Username *string `protobuf:"bytes,2,opt,name=username" json:"username,omitempty"`
+	// OAuth scope.
+	OauthScope       *string `protobuf:"bytes,3,opt,name=oauth_scope,json=oauthScope" json:"oauth_scope,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *SimpleResponse) Reset()                    { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string            { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()               {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+func (m *SimpleResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *SimpleResponse) GetUsername() string {
+	if m != nil && m.Username != nil {
+		return *m.Username
+	}
+	return ""
+}
+
+func (m *SimpleResponse) GetOauthScope() string {
+	if m != nil && m.OauthScope != nil {
+		return *m.OauthScope
+	}
+	return ""
+}
+
+// Client-streaming request.
+type StreamingInputCallRequest struct {
+	// Optional input payload sent along with the request.
+	Payload          *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *StreamingInputCallRequest) Reset()                    { *m = StreamingInputCallRequest{} }
+func (m *StreamingInputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallRequest) ProtoMessage()               {}
+func (*StreamingInputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *StreamingInputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// Client-streaming response.
+type StreamingInputCallResponse struct {
+	// Aggregated size of payloads received from the client.
+	AggregatedPayloadSize *int32 `protobuf:"varint,1,opt,name=aggregated_payload_size,json=aggregatedPayloadSize" json:"aggregated_payload_size,omitempty"`
+	XXX_unrecognized      []byte `json:"-"`
+}
+
+func (m *StreamingInputCallResponse) Reset()                    { *m = StreamingInputCallResponse{} }
+func (m *StreamingInputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallResponse) ProtoMessage()               {}
+func (*StreamingInputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *StreamingInputCallResponse) GetAggregatedPayloadSize() int32 {
+	if m != nil && m.AggregatedPayloadSize != nil {
+		return *m.AggregatedPayloadSize
+	}
+	return 0
+}
+
+// Configuration for a particular response.
+type ResponseParameters struct {
+	// Desired payload sizes in responses from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	Size *int32 `protobuf:"varint,1,opt,name=size" json:"size,omitempty"`
+	// Desired interval between consecutive responses in the response stream in
+	// microseconds.
+	IntervalUs       *int32 `protobuf:"varint,2,opt,name=interval_us,json=intervalUs" json:"interval_us,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ResponseParameters) Reset()                    { *m = ResponseParameters{} }
+func (m *ResponseParameters) String() string            { return proto.CompactTextString(m) }
+func (*ResponseParameters) ProtoMessage()               {}
+func (*ResponseParameters) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *ResponseParameters) GetSize() int32 {
+	if m != nil && m.Size != nil {
+		return *m.Size
+	}
+	return 0
+}
+
+func (m *ResponseParameters) GetIntervalUs() int32 {
+	if m != nil && m.IntervalUs != nil {
+		return *m.IntervalUs
+	}
+	return 0
+}
+
+// Server-streaming request.
+type StreamingOutputCallRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, the payload from each response in the stream
+	// might be of different types. This is to simulate a mixed type of payload
+	// stream.
+	ResponseType *PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Configuration for each expected response message.
+	ResponseParameters []*ResponseParameters `protobuf:"bytes,2,rep,name=response_parameters,json=responseParameters" json:"response_parameters,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	// Whether server should return a given status
+	ResponseStatus   *EchoStatus `protobuf:"bytes,7,opt,name=response_status,json=responseStatus" json:"response_status,omitempty"`
+	XXX_unrecognized []byte      `json:"-"`
+}
+
+func (m *StreamingOutputCallRequest) Reset()                    { *m = StreamingOutputCallRequest{} }
+func (m *StreamingOutputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallRequest) ProtoMessage()               {}
+func (*StreamingOutputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+func (m *StreamingOutputCallRequest) GetResponseType() PayloadType {
+	if m != nil && m.ResponseType != nil {
+		return *m.ResponseType
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *StreamingOutputCallRequest) GetResponseParameters() []*ResponseParameters {
+	if m != nil {
+		return m.ResponseParameters
+	}
+	return nil
+}
+
+func (m *StreamingOutputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *StreamingOutputCallRequest) GetResponseStatus() *EchoStatus {
+	if m != nil {
+		return m.ResponseStatus
+	}
+	return nil
+}
+
+// Server-streaming response, as configured by the request and parameters.
+type StreamingOutputCallResponse struct {
+	// Payload to increase response size.
+	Payload          *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *StreamingOutputCallResponse) Reset()                    { *m = StreamingOutputCallResponse{} }
+func (m *StreamingOutputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallResponse) ProtoMessage()               {}
+func (*StreamingOutputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+
+func (m *StreamingOutputCallResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Empty)(nil), "grpc.testing.Empty")
+	proto.RegisterType((*Payload)(nil), "grpc.testing.Payload")
+	proto.RegisterType((*EchoStatus)(nil), "grpc.testing.EchoStatus")
+	proto.RegisterType((*SimpleRequest)(nil), "grpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "grpc.testing.SimpleResponse")
+	proto.RegisterType((*StreamingInputCallRequest)(nil), "grpc.testing.StreamingInputCallRequest")
+	proto.RegisterType((*StreamingInputCallResponse)(nil), "grpc.testing.StreamingInputCallResponse")
+	proto.RegisterType((*ResponseParameters)(nil), "grpc.testing.ResponseParameters")
+	proto.RegisterType((*StreamingOutputCallRequest)(nil), "grpc.testing.StreamingOutputCallRequest")
+	proto.RegisterType((*StreamingOutputCallResponse)(nil), "grpc.testing.StreamingOutputCallResponse")
+	proto.RegisterEnum("grpc.testing.PayloadType", PayloadType_name, PayloadType_value)
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for TestService service
+
+type TestServiceClient interface {
+	// One empty request followed by one empty response.
+	EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error)
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error)
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error)
+}
+
+type testServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTestServiceClient(cc *grpc.ClientConn) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
+	out := new(Empty)
+	err := grpc.Invoke(ctx, "/grpc.testing.TestService/EmptyCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[0], c.cc, "/grpc.testing.TestService/StreamingOutputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingOutputCallClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type TestService_StreamingOutputCallClient interface {
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingOutputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[1], c.cc, "/grpc.testing.TestService/StreamingInputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingInputCallClient{stream}
+	return x, nil
+}
+
+type TestService_StreamingInputCallClient interface {
+	Send(*StreamingInputCallRequest) error
+	CloseAndRecv() (*StreamingInputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingInputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingInputCallClient) Send(m *StreamingInputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCallResponse, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(StreamingInputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[2], c.cc, "/grpc.testing.TestService/FullDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceFullDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_FullDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceFullDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceFullDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[3], c.cc, "/grpc.testing.TestService/HalfDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceHalfDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_HalfDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceHalfDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceHalfDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for TestService service
+
+type TestServiceServer interface {
+	// One empty request followed by one empty response.
+	EmptyCall(context.Context, *Empty) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(TestService_HalfDuplexCallServer) error
+}
+
+func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
+	s.RegisterService(&_TestService_serviceDesc, srv)
+}
+
+func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).EmptyCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.TestService/EmptyCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.TestService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(StreamingOutputCallRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+
+type TestService_StreamingOutputCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	grpc.ServerStream
+}
+
+type testServiceStreamingOutputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+
+type TestService_StreamingInputCallServer interface {
+	SendAndClose(*StreamingInputCallResponse) error
+	Recv() (*StreamingInputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceStreamingInputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingInputCallServer) SendAndClose(m *StreamingInputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest, error) {
+	m := new(StreamingInputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+
+type TestService_FullDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceFullDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceFullDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
+}
+
+type TestService_HalfDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceHalfDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceHalfDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _TestService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "EmptyCall",
+			Handler:    _TestService_EmptyCall_Handler,
+		},
+		{
+			MethodName: "UnaryCall",
+			Handler:    _TestService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingOutputCall",
+			Handler:       _TestService_StreamingOutputCall_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "StreamingInputCall",
+			Handler:       _TestService_StreamingInputCall_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "FullDuplexCall",
+			Handler:       _TestService_FullDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "HalfDuplexCall",
+			Handler:       _TestService_HalfDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+// Client API for UnimplementedService service
+
+type UnimplementedServiceClient interface {
+	// A call that no server should implement
+	UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
+}
+
+type unimplementedServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewUnimplementedServiceClient(cc *grpc.ClientConn) UnimplementedServiceClient {
+	return &unimplementedServiceClient{cc}
+}
+
+func (c *unimplementedServiceClient) UnimplementedCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
+	out := new(Empty)
+	err := grpc.Invoke(ctx, "/grpc.testing.UnimplementedService/UnimplementedCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for UnimplementedService service
+
+type UnimplementedServiceServer interface {
+	// A call that no server should implement
+	UnimplementedCall(context.Context, *Empty) (*Empty, error)
+}
+
+func RegisterUnimplementedServiceServer(s *grpc.Server, srv UnimplementedServiceServer) {
+	s.RegisterService(&_UnimplementedService_serviceDesc, srv)
+}
+
+func _UnimplementedService_UnimplementedCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.UnimplementedService/UnimplementedCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(UnimplementedServiceServer).UnimplementedCall(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _UnimplementedService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.UnimplementedService",
+	HandlerType: (*UnimplementedServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnimplementedCall",
+			Handler:    _UnimplementedService_UnimplementedCall_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: fileDescriptor0,
+}
+
+func init() { proto.RegisterFile("test.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 649 bytes of a gzipped FileDescriptorProto
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+	0x9c, 0x2e, 0xf1, 0xd0, 0x5c, 0x04, 0xe2, 0x3e, 0xac, 0xf5, 0x7d, 0x16, 0xa5, 0x61, 0xdb, 0xb3,
+	0x8c, 0x99, 0xdf, 0x57, 0xf3, 0xc1, 0xe2, 0xc7, 0x6c, 0x00, 0x2e, 0x6c, 0x2c, 0x98, 0x0f, 0x1a,
+	0x73, 0x41, 0xd7, 0xfa, 0xac, 0xf9, 0xe4, 0x06, 0xcc, 0xb4, 0xd6, 0x0b, 0x05, 0x1d, 0xc0, 0xab,
+	0x1f, 0x15, 0x3e, 0xbe, 0x26, 0xc5, 0xfc, 0x47, 0xdc, 0x34, 0x7e, 0x4d, 0x4c, 0x4b, 0x19, 0xa2,
+	0x94, 0xba, 0x9f, 0xb8, 0xee, 0x5e, 0x12, 0xba, 0xf4, 0xe5, 0x9f, 0x69, 0x32, 0x14, 0xa9, 0x4a,
+	0xfd, 0xc0, 0xdc, 0xb3, 0xff, 0x50, 0xaa, 0xd3, 0x87, 0x7b, 0x7d, 0x5f, 0x6e, 0xd0, 0x23, 0x9f,
+	0xd3, 0x28, 0x77, 0xd1, 0x1b, 0xb8, 0x3b, 0x83, 0x2f, 0xe7, 0xa6, 0x9f, 0x01, 0x00, 0x00, 0xff,
+	0xff, 0xdd, 0xb5, 0x50, 0x6f, 0xa2, 0x07, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/interop/grpc_testing/test.proto b/vendor/google.golang.org/grpc/interop/grpc_testing/test.proto
new file mode 100644
index 00000000000..cc2bb74f3b7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/grpc_testing/test.proto
@@ -0,0 +1,160 @@
+// An integration test service that covers all the method signature permutations
+// of unary/streaming requests/responses.
+syntax = "proto2";
+
+package grpc.testing;
+
+message Empty {}
+
+// The type of payload that should be returned.
+enum PayloadType {
+  // Compressable text format.
+  COMPRESSABLE = 0;
+
+  // Uncompressable binary format.
+  UNCOMPRESSABLE = 1;
+
+  // Randomly chosen from all other formats defined in this enum.
+  RANDOM = 2;
+}
+
+// A block of data, to simply increase gRPC message size.
+message Payload {
+  // The type of data in body.
+  optional PayloadType type = 1;
+  // Primary contents of payload.
+  optional bytes body = 2;
+}
+
+// A protobuf representation for grpc status. This is used by test
+// clients to specify a status that the server should attempt to return.
+message EchoStatus {
+  optional int32 code = 1;
+  optional string message = 2;
+}
+
+// Unary request.
+message SimpleRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, server randomly chooses one from other formats.
+  optional PayloadType response_type = 1;
+
+  // Desired payload size in the response from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  optional int32 response_size = 2;
+
+  // Optional input payload sent along with the request.
+  optional Payload payload = 3;
+
+  // Whether SimpleResponse should include username.
+  optional bool fill_username = 4;
+
+  // Whether SimpleResponse should include OAuth scope.
+  optional bool fill_oauth_scope = 5;
+
+  // Whether server should return a given status
+  optional EchoStatus response_status = 7;
+}
+
+// Unary response, as configured by the request.
+message SimpleResponse {
+  // Payload to increase message size.
+  optional Payload payload = 1;
+
+  // The user the request came from, for verifying authentication was
+  // successful when the client expected it.
+  optional string username = 2;
+  
+  // OAuth scope.
+  optional string oauth_scope = 3;
+}
+
+// Client-streaming request.
+message StreamingInputCallRequest {
+  // Optional input payload sent along with the request.
+  optional Payload payload = 1;
+
+  // Not expecting any payload from the response.
+}
+
+// Client-streaming response.
+message StreamingInputCallResponse {
+  // Aggregated size of payloads received from the client.
+  optional int32 aggregated_payload_size = 1;
+}
+
+// Configuration for a particular response.
+message ResponseParameters {
+  // Desired payload sizes in responses from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  optional int32 size = 1;
+
+  // Desired interval between consecutive responses in the response stream in
+  // microseconds.
+  optional int32 interval_us = 2;
+}
+
+// Server-streaming request.
+message StreamingOutputCallRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, the payload from each response in the stream
+  // might be of different types. This is to simulate a mixed type of payload
+  // stream.
+  optional PayloadType response_type = 1;
+
+  // Configuration for each expected response message.
+  repeated ResponseParameters response_parameters = 2;
+
+  // Optional input payload sent along with the request.
+  optional Payload payload = 3;
+
+  // Whether server should return a given status
+  optional EchoStatus response_status = 7;
+}
+
+// Server-streaming response, as configured by the request and parameters.
+message StreamingOutputCallResponse {
+  // Payload to increase response size.
+  optional Payload payload = 1;
+}
+
+// A simple service to test the various types of RPCs and experiment with
+// performance with various types of payload.
+service TestService {
+  // One empty request followed by one empty response.
+  rpc EmptyCall(Empty) returns (Empty);
+
+  // One request followed by one response.
+  // The server returns the client payload as-is.
+  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
+
+  // One request followed by a sequence of responses (streamed download).
+  // The server returns the payload with client desired type and sizes.
+  rpc StreamingOutputCall(StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+
+  // A sequence of requests followed by one response (streamed upload).
+  // The server returns the aggregated size of client payload as the result.
+  rpc StreamingInputCall(stream StreamingInputCallRequest)
+      returns (StreamingInputCallResponse);
+
+  // A sequence of requests with each request served by the server immediately.
+  // As one request could lead to multiple responses, this interface
+  // demonstrates the idea of full duplexing.
+  rpc FullDuplexCall(stream StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+
+  // A sequence of requests followed by a sequence of responses.
+  // The server buffers all the client requests and then serves them in order. A
+  // stream of responses are returned to the client when the server starts with
+  // first request.
+  rpc HalfDuplexCall(stream StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+}
+
+// A simple service NOT implemented at servers so clients can test for
+// that case.
+service UnimplementedService {
+  // A call that no server should implement
+  rpc UnimplementedCall(grpc.testing.Empty) returns (grpc.testing.Empty);
+}
diff --git a/vendor/google.golang.org/grpc/interop/http2/negative_http2_client.go b/vendor/google.golang.org/grpc/interop/http2/negative_http2_client.go
new file mode 100644
index 00000000000..9c09ad7b74b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/http2/negative_http2_client.go
@@ -0,0 +1,174 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Client used to test http2 error edge cases like GOAWAYs and RST_STREAMs
+ *
+ * Documentation:
+ *	 https://github.com/grpc/grpc/blob/master/doc/negative-http2-interop-test-descriptions.md
+ */
+
+package main
+
+import (
+	"flag"
+	"net"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/interop"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+)
+
+var (
+	serverHost = flag.String("server_host", "127.0.0.1", "The server host name")
+	serverPort = flag.Int("server_port", 8080, "The server port number")
+	testCase   = flag.String("test_case", "goaway",
+		`Configure different test cases. Valid options are:
+        goaway : client sends two requests, the server will send a goaway in between;
+        rst_after_header : server will send rst_stream after it sends headers;
+        rst_during_data : server will send rst_stream while sending data;
+        rst_after_data : server will send rst_stream after sending data;
+        ping : server will send pings between each http2 frame;
+        max_streams : server will ensure that the max_concurrent_streams limit is upheld;`)
+	largeReqSize  = 271828
+	largeRespSize = 314159
+)
+
+func largeSimpleRequest() *testpb.SimpleRequest {
+	pl := interop.ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	return &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(int32(largeRespSize)),
+		Payload:      pl,
+	}
+}
+
+// sends two unary calls. The server asserts that the calls use different connections.
+func goaway(tc testpb.TestServiceClient) {
+	interop.DoLargeUnaryCall(tc)
+	// sleep to ensure that the client has time to recv the GOAWAY.
+	// TODO(ncteisen): make this less hacky.
+	time.Sleep(1 * time.Second)
+	interop.DoLargeUnaryCall(tc)
+}
+
+func rstAfterHeader(tc testpb.TestServiceClient) {
+	req := largeSimpleRequest()
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if reply != nil {
+		grpclog.Fatalf("Client received reply despite server sending rst stream after header")
+	}
+	if grpc.Code(err) != codes.Internal {
+		grpclog.Fatalf("%v.UnaryCall() = _, %v, want _, %v", tc, grpc.Code(err), codes.Internal)
+	}
+}
+
+func rstDuringData(tc testpb.TestServiceClient) {
+	req := largeSimpleRequest()
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if reply != nil {
+		grpclog.Fatalf("Client received reply despite server sending rst stream during data")
+	}
+	if grpc.Code(err) != codes.Unknown {
+		grpclog.Fatalf("%v.UnaryCall() = _, %v, want _, %v", tc, grpc.Code(err), codes.Unknown)
+	}
+}
+
+func rstAfterData(tc testpb.TestServiceClient) {
+	req := largeSimpleRequest()
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if reply != nil {
+		grpclog.Fatalf("Client received reply despite server sending rst stream after data")
+	}
+	if grpc.Code(err) != codes.Internal {
+		grpclog.Fatalf("%v.UnaryCall() = _, %v, want _, %v", tc, grpc.Code(err), codes.Internal)
+	}
+}
+
+func ping(tc testpb.TestServiceClient) {
+	// The server will assert that every ping it sends was ACK-ed by the client.
+	interop.DoLargeUnaryCall(tc)
+}
+
+func maxStreams(tc testpb.TestServiceClient) {
+	interop.DoLargeUnaryCall(tc)
+	var wg sync.WaitGroup
+	for i := 0; i < 15; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			interop.DoLargeUnaryCall(tc)
+		}()
+	}
+	wg.Wait()
+}
+
+func main() {
+	flag.Parse()
+	serverAddr := net.JoinHostPort(*serverHost, strconv.Itoa(*serverPort))
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	conn, err := grpc.Dial(serverAddr, opts...)
+	if err != nil {
+		grpclog.Fatalf("Fail to dial: %v", err)
+	}
+	defer conn.Close()
+	tc := testpb.NewTestServiceClient(conn)
+	switch *testCase {
+	case "goaway":
+		goaway(tc)
+		grpclog.Println("goaway done")
+	case "rst_after_header":
+		rstAfterHeader(tc)
+		grpclog.Println("rst_after_header done")
+	case "rst_during_data":
+		rstDuringData(tc)
+		grpclog.Println("rst_during_data done")
+	case "rst_after_data":
+		rstAfterData(tc)
+		grpclog.Println("rst_after_data done")
+	case "ping":
+		ping(tc)
+		grpclog.Println("ping done")
+	case "max_streams":
+		maxStreams(tc)
+		grpclog.Println("max_streams done")
+	default:
+		grpclog.Fatal("Unsupported test case: ", *testCase)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/interop/server/server.go b/vendor/google.golang.org/grpc/interop/server/server.go
new file mode 100644
index 00000000000..36ebcb6418e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/server/server.go
@@ -0,0 +1,73 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"flag"
+	"net"
+	"strconv"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/interop"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+)
+
+var (
+	useTLS   = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP")
+	certFile = flag.String("tls_cert_file", "testdata/server1.pem", "The TLS cert file")
+	keyFile  = flag.String("tls_key_file", "testdata/server1.key", "The TLS key file")
+	port     = flag.Int("port", 10000, "The server port")
+)
+
+func main() {
+	flag.Parse()
+	p := strconv.Itoa(*port)
+	lis, err := net.Listen("tcp", ":"+p)
+	if err != nil {
+		grpclog.Fatalf("failed to listen: %v", err)
+	}
+	var opts []grpc.ServerOption
+	if *useTLS {
+		creds, err := credentials.NewServerTLSFromFile(*certFile, *keyFile)
+		if err != nil {
+			grpclog.Fatalf("Failed to generate credentials %v", err)
+		}
+		opts = []grpc.ServerOption{grpc.Creds(creds)}
+	}
+	server := grpc.NewServer(opts...)
+	testpb.RegisterTestServiceServer(server, interop.NewTestServer())
+	server.Serve(lis)
+}
diff --git a/vendor/google.golang.org/grpc/interop/server/testdata/ca.pem b/vendor/google.golang.org/grpc/interop/server/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/server/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/interop/server/testdata/server1.key b/vendor/google.golang.org/grpc/interop/server/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/server/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/interop/server/testdata/server1.pem b/vendor/google.golang.org/grpc/interop/server/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/server/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET
+MBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0cyBQ
+dHkgTHRkMQ8wDQYDVQQDEwZ0ZXN0Y2EwHhcNMTUxMTA0MDIyMDI0WhcNMjUxMTAx
+MDIyMDI0WjBlMQswCQYDVQQGEwJVUzERMA8GA1UECBMISWxsaW5vaXMxEDAOBgNV
+BAcTB0NoaWNhZ28xFTATBgNVBAoTDEV4YW1wbGUsIENvLjEaMBgGA1UEAxQRKi50
+ZXN0Lmdvb2dsZS5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAOHDFSco
+LCVJpYDDM4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1Bg
+zkWF+slf3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd
+9N8YwbBYAckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAGjazBpMAkGA1UdEwQCMAAw
+CwYDVR0PBAQDAgXgME8GA1UdEQRIMEaCECoudGVzdC5nb29nbGUuZnKCGHdhdGVy
+em9vaS50ZXN0Lmdvb2dsZS5iZYISKi50ZXN0LnlvdXR1YmUuY29thwTAqAEDMA0G
+CSqGSIb3DQEBCwUAA4GBAJFXVifQNub1LUP4JlnX5lXNlo8FxZ2a12AFQs+bzoJ6
+hM044EDjqyxUqSbVePK0ni3w1fHQB5rY9yYC5f8G7aqqTY1QOhoUk8ZTSTRpnkTh
+y4jjdvTZeLDVBlueZUTDRmy2feY5aZIU18vFDK08dTG0A87pppuv1LNIR3loveU8
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/interop/test_utils.go b/vendor/google.golang.org/grpc/interop/test_utils.go
new file mode 100644
index 00000000000..e4e427c75e5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/interop/test_utils.go
@@ -0,0 +1,761 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package interop
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/google"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+	"google.golang.org/grpc/metadata"
+)
+
+var (
+	reqSizes            = []int{27182, 8, 1828, 45904}
+	respSizes           = []int{31415, 9, 2653, 58979}
+	largeReqSize        = 271828
+	largeRespSize       = 314159
+	initialMetadataKey  = "x-grpc-test-echo-initial"
+	trailingMetadataKey = "x-grpc-test-echo-trailing-bin"
+)
+
+// ClientNewPayload returns a payload of the given type and size.
+func ClientNewPayload(t testpb.PayloadType, size int) *testpb.Payload {
+	if size < 0 {
+		grpclog.Fatalf("Requested a response with invalid length %d", size)
+	}
+	body := make([]byte, size)
+	switch t {
+	case testpb.PayloadType_COMPRESSABLE:
+	case testpb.PayloadType_UNCOMPRESSABLE:
+		grpclog.Fatalf("PayloadType UNCOMPRESSABLE is not supported")
+	default:
+		grpclog.Fatalf("Unsupported payload type: %d", t)
+	}
+	return &testpb.Payload{
+		Type: t.Enum(),
+		Body: body,
+	}
+}
+
+// DoEmptyUnaryCall performs a unary RPC with empty request and response messages.
+func DoEmptyUnaryCall(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	reply, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, args...)
+	if err != nil {
+		grpclog.Fatal("/TestService/EmptyCall RPC failed: ", err)
+	}
+	if !proto.Equal(&testpb.Empty{}, reply) {
+		grpclog.Fatalf("/TestService/EmptyCall receives %v, want %v", reply, testpb.Empty{})
+	}
+}
+
+// DoLargeUnaryCall performs a unary RPC with large payload in the request and response.
+func DoLargeUnaryCall(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(int32(largeRespSize)),
+		Payload:      pl,
+	}
+	reply, err := tc.UnaryCall(context.Background(), req, args...)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	t := reply.GetPayload().GetType()
+	s := len(reply.GetPayload().GetBody())
+	if t != testpb.PayloadType_COMPRESSABLE || s != largeRespSize {
+		grpclog.Fatalf("Got the reply with type %d len %d; want %d, %d", t, s, testpb.PayloadType_COMPRESSABLE, largeRespSize)
+	}
+}
+
+// DoClientStreaming performs a client streaming RPC.
+func DoClientStreaming(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	stream, err := tc.StreamingInputCall(context.Background(), args...)
+	if err != nil {
+		grpclog.Fatalf("%v.StreamingInputCall(_) = _, %v", tc, err)
+	}
+	var sum int
+	for _, s := range reqSizes {
+		pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, s)
+		req := &testpb.StreamingInputCallRequest{
+			Payload: pl,
+		}
+		if err := stream.Send(req); err != nil {
+			grpclog.Fatalf("%v has error %v while sending %v", stream, err, req)
+		}
+		sum += s
+	}
+	reply, err := stream.CloseAndRecv()
+	if err != nil {
+		grpclog.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
+	}
+	if reply.GetAggregatedPayloadSize() != int32(sum) {
+		grpclog.Fatalf("%v.CloseAndRecv().GetAggregatePayloadSize() = %v; want %v", stream, reply.GetAggregatedPayloadSize(), sum)
+	}
+}
+
+// DoServerStreaming performs a server streaming RPC.
+func DoServerStreaming(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	respParam := make([]*testpb.ResponseParameters, len(respSizes))
+	for i, s := range respSizes {
+		respParam[i] = &testpb.ResponseParameters{
+			Size: proto.Int32(int32(s)),
+		}
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+	}
+	stream, err := tc.StreamingOutputCall(context.Background(), req, args...)
+	if err != nil {
+		grpclog.Fatalf("%v.StreamingOutputCall(_) = _, %v", tc, err)
+	}
+	var rpcStatus error
+	var respCnt int
+	var index int
+	for {
+		reply, err := stream.Recv()
+		if err != nil {
+			rpcStatus = err
+			break
+		}
+		t := reply.GetPayload().GetType()
+		if t != testpb.PayloadType_COMPRESSABLE {
+			grpclog.Fatalf("Got the reply of type %d, want %d", t, testpb.PayloadType_COMPRESSABLE)
+		}
+		size := len(reply.GetPayload().GetBody())
+		if size != int(respSizes[index]) {
+			grpclog.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
+		}
+		index++
+		respCnt++
+	}
+	if rpcStatus != io.EOF {
+		grpclog.Fatalf("Failed to finish the server streaming rpc: %v", rpcStatus)
+	}
+	if respCnt != len(respSizes) {
+		grpclog.Fatalf("Got %d reply, want %d", len(respSizes), respCnt)
+	}
+}
+
+// DoPingPong performs ping-pong style bi-directional streaming RPC.
+func DoPingPong(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	stream, err := tc.FullDuplexCall(context.Background(), args...)
+	if err != nil {
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
+	}
+	var index int
+	for index < len(reqSizes) {
+		respParam := []*testpb.ResponseParameters{
+			{
+				Size: proto.Int32(int32(respSizes[index])),
+			},
+		}
+		pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, reqSizes[index])
+		req := &testpb.StreamingOutputCallRequest{
+			ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+			ResponseParameters: respParam,
+			Payload:            pl,
+		}
+		if err := stream.Send(req); err != nil {
+			grpclog.Fatalf("%v has error %v while sending %v", stream, err, req)
+		}
+		reply, err := stream.Recv()
+		if err != nil {
+			grpclog.Fatalf("%v.Recv() = %v", stream, err)
+		}
+		t := reply.GetPayload().GetType()
+		if t != testpb.PayloadType_COMPRESSABLE {
+			grpclog.Fatalf("Got the reply of type %d, want %d", t, testpb.PayloadType_COMPRESSABLE)
+		}
+		size := len(reply.GetPayload().GetBody())
+		if size != int(respSizes[index]) {
+			grpclog.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
+		}
+		index++
+	}
+	if err := stream.CloseSend(); err != nil {
+		grpclog.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		grpclog.Fatalf("%v failed to complele the ping pong test: %v", stream, err)
+	}
+}
+
+// DoEmptyStream sets up a bi-directional streaming with zero message.
+func DoEmptyStream(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	stream, err := tc.FullDuplexCall(context.Background(), args...)
+	if err != nil {
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		grpclog.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		grpclog.Fatalf("%v failed to complete the empty stream test: %v", stream, err)
+	}
+}
+
+// DoTimeoutOnSleepingServer performs an RPC on a sleep server which causes RPC timeout.
+func DoTimeoutOnSleepingServer(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Millisecond)
+	defer cancel()
+	stream, err := tc.FullDuplexCall(ctx, args...)
+	if err != nil {
+		if grpc.Code(err) == codes.DeadlineExceeded {
+			return
+		}
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
+	}
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, 27182)
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		Payload:      pl,
+	}
+	if err := stream.Send(req); err != nil {
+		if grpc.Code(err) != codes.DeadlineExceeded {
+			grpclog.Fatalf("%v.Send(_) = %v", stream, err)
+		}
+	}
+	if _, err := stream.Recv(); grpc.Code(err) != codes.DeadlineExceeded {
+		grpclog.Fatalf("%v.Recv() = _, %v, want error code %d", stream, err, codes.DeadlineExceeded)
+	}
+}
+
+// DoComputeEngineCreds performs a unary RPC with compute engine auth.
+func DoComputeEngineCreds(tc testpb.TestServiceClient, serviceAccount, oauthScope string) {
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType:   testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize:   proto.Int32(int32(largeRespSize)),
+		Payload:        pl,
+		FillUsername:   proto.Bool(true),
+		FillOauthScope: proto.Bool(true),
+	}
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	user := reply.GetUsername()
+	scope := reply.GetOauthScope()
+	if user != serviceAccount {
+		grpclog.Fatalf("Got user name %q, want %q.", user, serviceAccount)
+	}
+	if !strings.Contains(oauthScope, scope) {
+		grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, oauthScope)
+	}
+}
+
+func getServiceAccountJSONKey(keyFile string) []byte {
+	jsonKey, err := ioutil.ReadFile(keyFile)
+	if err != nil {
+		grpclog.Fatalf("Failed to read the service account key file: %v", err)
+	}
+	return jsonKey
+}
+
+// DoServiceAccountCreds performs a unary RPC with service account auth.
+func DoServiceAccountCreds(tc testpb.TestServiceClient, serviceAccountKeyFile, oauthScope string) {
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType:   testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize:   proto.Int32(int32(largeRespSize)),
+		Payload:        pl,
+		FillUsername:   proto.Bool(true),
+		FillOauthScope: proto.Bool(true),
+	}
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	jsonKey := getServiceAccountJSONKey(serviceAccountKeyFile)
+	user := reply.GetUsername()
+	scope := reply.GetOauthScope()
+	if !strings.Contains(string(jsonKey), user) {
+		grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
+	}
+	if !strings.Contains(oauthScope, scope) {
+		grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, oauthScope)
+	}
+}
+
+// DoJWTTokenCreds performs a unary RPC with JWT token auth.
+func DoJWTTokenCreds(tc testpb.TestServiceClient, serviceAccountKeyFile string) {
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(int32(largeRespSize)),
+		Payload:      pl,
+		FillUsername: proto.Bool(true),
+	}
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	jsonKey := getServiceAccountJSONKey(serviceAccountKeyFile)
+	user := reply.GetUsername()
+	if !strings.Contains(string(jsonKey), user) {
+		grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
+	}
+}
+
+// GetToken obtains an OAUTH token from the input.
+func GetToken(serviceAccountKeyFile string, oauthScope string) *oauth2.Token {
+	jsonKey := getServiceAccountJSONKey(serviceAccountKeyFile)
+	config, err := google.JWTConfigFromJSON(jsonKey, oauthScope)
+	if err != nil {
+		grpclog.Fatalf("Failed to get the config: %v", err)
+	}
+	token, err := config.TokenSource(context.Background()).Token()
+	if err != nil {
+		grpclog.Fatalf("Failed to get the token: %v", err)
+	}
+	return token
+}
+
+// DoOauth2TokenCreds performs a unary RPC with OAUTH2 token auth.
+func DoOauth2TokenCreds(tc testpb.TestServiceClient, serviceAccountKeyFile, oauthScope string) {
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType:   testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize:   proto.Int32(int32(largeRespSize)),
+		Payload:        pl,
+		FillUsername:   proto.Bool(true),
+		FillOauthScope: proto.Bool(true),
+	}
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	jsonKey := getServiceAccountJSONKey(serviceAccountKeyFile)
+	user := reply.GetUsername()
+	scope := reply.GetOauthScope()
+	if !strings.Contains(string(jsonKey), user) {
+		grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
+	}
+	if !strings.Contains(oauthScope, scope) {
+		grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, oauthScope)
+	}
+}
+
+// DoPerRPCCreds performs a unary RPC with per RPC OAUTH2 token.
+func DoPerRPCCreds(tc testpb.TestServiceClient, serviceAccountKeyFile, oauthScope string) {
+	jsonKey := getServiceAccountJSONKey(serviceAccountKeyFile)
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, largeReqSize)
+	req := &testpb.SimpleRequest{
+		ResponseType:   testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize:   proto.Int32(int32(largeRespSize)),
+		Payload:        pl,
+		FillUsername:   proto.Bool(true),
+		FillOauthScope: proto.Bool(true),
+	}
+	token := GetToken(serviceAccountKeyFile, oauthScope)
+	kv := map[string]string{"authorization": token.TokenType + " " + token.AccessToken}
+	ctx := metadata.NewContext(context.Background(), metadata.MD{"authorization": []string{kv["authorization"]}})
+	reply, err := tc.UnaryCall(ctx, req)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	user := reply.GetUsername()
+	scope := reply.GetOauthScope()
+	if !strings.Contains(string(jsonKey), user) {
+		grpclog.Fatalf("Got user name %q which is NOT a substring of %q.", user, jsonKey)
+	}
+	if !strings.Contains(oauthScope, scope) {
+		grpclog.Fatalf("Got OAuth scope %q which is NOT a substring of %q.", scope, oauthScope)
+	}
+}
+
+var (
+	testMetadata = metadata.MD{
+		"key1": []string{"value1"},
+		"key2": []string{"value2"},
+	}
+)
+
+// DoCancelAfterBegin cancels the RPC after metadata has been sent but before payloads are sent.
+func DoCancelAfterBegin(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	ctx, cancel := context.WithCancel(metadata.NewContext(context.Background(), testMetadata))
+	stream, err := tc.StreamingInputCall(ctx, args...)
+	if err != nil {
+		grpclog.Fatalf("%v.StreamingInputCall(_) = _, %v", tc, err)
+	}
+	cancel()
+	_, err = stream.CloseAndRecv()
+	if grpc.Code(err) != codes.Canceled {
+		grpclog.Fatalf("%v.CloseAndRecv() got error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
+	}
+}
+
+// DoCancelAfterFirstResponse cancels the RPC after receiving the first message from the server.
+func DoCancelAfterFirstResponse(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	ctx, cancel := context.WithCancel(context.Background())
+	stream, err := tc.FullDuplexCall(ctx, args...)
+	if err != nil {
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v", tc, err)
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(31415),
+		},
+	}
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, 27182)
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            pl,
+	}
+	if err := stream.Send(req); err != nil {
+		grpclog.Fatalf("%v has error %v while sending %v", stream, err, req)
+	}
+	if _, err := stream.Recv(); err != nil {
+		grpclog.Fatalf("%v.Recv() = %v", stream, err)
+	}
+	cancel()
+	if _, err := stream.Recv(); grpc.Code(err) != codes.Canceled {
+		grpclog.Fatalf("%v compleled with error code %d, want %d", stream, grpc.Code(err), codes.Canceled)
+	}
+}
+
+var (
+	initialMetadataValue  = "test_initial_metadata_value"
+	trailingMetadataValue = "\x0a\x0b\x0a\x0b\x0a\x0b"
+	customMetadata        = metadata.Pairs(
+		initialMetadataKey, initialMetadataValue,
+		trailingMetadataKey, trailingMetadataValue,
+	)
+)
+
+func validateMetadata(header, trailer metadata.MD) {
+	if len(header[initialMetadataKey]) != 1 {
+		grpclog.Fatalf("Expected exactly one header from server. Received %d", len(header[initialMetadataKey]))
+	}
+	if header[initialMetadataKey][0] != initialMetadataValue {
+		grpclog.Fatalf("Got header %s; want %s", header[initialMetadataKey][0], initialMetadataValue)
+	}
+	if len(trailer[trailingMetadataKey]) != 1 {
+		grpclog.Fatalf("Expected exactly one trailer from server. Received %d", len(trailer[trailingMetadataKey]))
+	}
+	if trailer[trailingMetadataKey][0] != trailingMetadataValue {
+		grpclog.Fatalf("Got trailer %s; want %s", trailer[trailingMetadataKey][0], trailingMetadataValue)
+	}
+}
+
+// DoCustomMetadata checks that metadata is echoed back to the client.
+func DoCustomMetadata(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	// Testing with UnaryCall.
+	pl := ClientNewPayload(testpb.PayloadType_COMPRESSABLE, 1)
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(int32(1)),
+		Payload:      pl,
+	}
+	ctx := metadata.NewContext(context.Background(), customMetadata)
+	var header, trailer metadata.MD
+	args = append(args, grpc.Header(&header), grpc.Trailer(&trailer))
+	reply, err := tc.UnaryCall(
+		ctx,
+		req,
+		args...,
+	)
+	if err != nil {
+		grpclog.Fatal("/TestService/UnaryCall RPC failed: ", err)
+	}
+	t := reply.GetPayload().GetType()
+	s := len(reply.GetPayload().GetBody())
+	if t != testpb.PayloadType_COMPRESSABLE || s != 1 {
+		grpclog.Fatalf("Got the reply with type %d len %d; want %d, %d", t, s, testpb.PayloadType_COMPRESSABLE, 1)
+	}
+	validateMetadata(header, trailer)
+
+	// Testing with FullDuplex.
+	stream, err := tc.FullDuplexCall(ctx, args...)
+	if err != nil {
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(1),
+		},
+	}
+	streamReq := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            pl,
+	}
+	if err := stream.Send(streamReq); err != nil {
+		grpclog.Fatalf("%v has error %v while sending %v", stream, err, streamReq)
+	}
+	streamHeader, err := stream.Header()
+	if err != nil {
+		grpclog.Fatalf("%v.Header() = %v", stream, err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		grpclog.Fatalf("%v.Recv() = %v", stream, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		grpclog.Fatalf("%v.CloseSend() = %v, want <nil>", stream, err)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		grpclog.Fatalf("%v failed to complete the custom metadata test: %v", stream, err)
+	}
+	streamTrailer := stream.Trailer()
+	validateMetadata(streamHeader, streamTrailer)
+}
+
+// DoStatusCodeAndMessage checks that the status code is propagated back to the client.
+func DoStatusCodeAndMessage(tc testpb.TestServiceClient, args ...grpc.CallOption) {
+	var code int32 = 2
+	msg := "test status message"
+	expectedErr := grpc.Errorf(codes.Code(code), msg)
+	respStatus := &testpb.EchoStatus{
+		Code:    proto.Int32(code),
+		Message: proto.String(msg),
+	}
+	// Test UnaryCall.
+	req := &testpb.SimpleRequest{
+		ResponseStatus: respStatus,
+	}
+	if _, err := tc.UnaryCall(context.Background(), req, args...); err == nil || err.Error() != expectedErr.Error() {
+		grpclog.Fatalf("%v.UnaryCall(_, %v) = _, %v, want _, %v", tc, req, err, expectedErr)
+	}
+	// Test FullDuplexCall.
+	stream, err := tc.FullDuplexCall(context.Background(), args...)
+	if err != nil {
+		grpclog.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	streamReq := &testpb.StreamingOutputCallRequest{
+		ResponseStatus: respStatus,
+	}
+	if err := stream.Send(streamReq); err != nil {
+		grpclog.Fatalf("%v has error %v while sending %v, want <nil>", stream, err, streamReq)
+	}
+	if err := stream.CloseSend(); err != nil {
+		grpclog.Fatalf("%v.CloseSend() = %v, want <nil>", stream, err)
+	}
+	if _, err = stream.Recv(); err.Error() != expectedErr.Error() {
+		grpclog.Fatalf("%v.Recv() returned error %v, want %v", stream, err, expectedErr)
+	}
+}
+
+// DoUnimplementedService attempts to call a method from an unimplemented service.
+func DoUnimplementedService(tc testpb.UnimplementedServiceClient) {
+	_, err := tc.UnimplementedCall(context.Background(), &testpb.Empty{})
+	if grpc.Code(err) != codes.Unimplemented {
+		grpclog.Fatalf("%v.UnimplementedCall() = _, %v, want _, %v", tc, grpc.Code(err), codes.Unimplemented)
+	}
+}
+
+// DoUnimplementedMethod attempts to call an unimplemented method.
+func DoUnimplementedMethod(cc *grpc.ClientConn) {
+	var req, reply proto.Message
+	if err := grpc.Invoke(context.Background(), "/grpc.testing.TestService/UnimplementedCall", req, reply, cc); err == nil || grpc.Code(err) != codes.Unimplemented {
+		grpclog.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want error code %s", err, codes.Unimplemented)
+	}
+}
+
+type testServer struct {
+}
+
+// NewTestServer creates a test server for test service.
+func NewTestServer() testpb.TestServiceServer {
+	return &testServer{}
+}
+
+func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
+	return new(testpb.Empty), nil
+}
+
+func serverNewPayload(t testpb.PayloadType, size int32) (*testpb.Payload, error) {
+	if size < 0 {
+		return nil, fmt.Errorf("requested a response with invalid length %d", size)
+	}
+	body := make([]byte, size)
+	switch t {
+	case testpb.PayloadType_COMPRESSABLE:
+	case testpb.PayloadType_UNCOMPRESSABLE:
+		return nil, fmt.Errorf("payloadType UNCOMPRESSABLE is not supported")
+	default:
+		return nil, fmt.Errorf("unsupported payload type: %d", t)
+	}
+	return &testpb.Payload{
+		Type: t.Enum(),
+		Body: body,
+	}, nil
+}
+
+func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	status := in.GetResponseStatus()
+	if md, ok := metadata.FromContext(ctx); ok {
+		if initialMetadata, ok := md[initialMetadataKey]; ok {
+			header := metadata.Pairs(initialMetadataKey, initialMetadata[0])
+			grpc.SendHeader(ctx, header)
+		}
+		if trailingMetadata, ok := md[trailingMetadataKey]; ok {
+			trailer := metadata.Pairs(trailingMetadataKey, trailingMetadata[0])
+			grpc.SetTrailer(ctx, trailer)
+		}
+	}
+	if status != nil && *status.Code != 0 {
+		return nil, grpc.Errorf(codes.Code(*status.Code), *status.Message)
+	}
+	pl, err := serverNewPayload(in.GetResponseType(), in.GetResponseSize())
+	if err != nil {
+		return nil, err
+	}
+	return &testpb.SimpleResponse{
+		Payload: pl,
+	}, nil
+}
+
+func (s *testServer) StreamingOutputCall(args *testpb.StreamingOutputCallRequest, stream testpb.TestService_StreamingOutputCallServer) error {
+	cs := args.GetResponseParameters()
+	for _, c := range cs {
+		if us := c.GetIntervalUs(); us > 0 {
+			time.Sleep(time.Duration(us) * time.Microsecond)
+		}
+		pl, err := serverNewPayload(args.GetResponseType(), c.GetSize())
+		if err != nil {
+			return err
+		}
+		if err := stream.Send(&testpb.StreamingOutputCallResponse{
+			Payload: pl,
+		}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *testServer) StreamingInputCall(stream testpb.TestService_StreamingInputCallServer) error {
+	var sum int
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return stream.SendAndClose(&testpb.StreamingInputCallResponse{
+				AggregatedPayloadSize: proto.Int32(int32(sum)),
+			})
+		}
+		if err != nil {
+			return err
+		}
+		p := in.GetPayload().GetBody()
+		sum += len(p)
+	}
+}
+
+func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
+	if md, ok := metadata.FromContext(stream.Context()); ok {
+		if initialMetadata, ok := md[initialMetadataKey]; ok {
+			header := metadata.Pairs(initialMetadataKey, initialMetadata[0])
+			stream.SendHeader(header)
+		}
+		if trailingMetadata, ok := md[trailingMetadataKey]; ok {
+			trailer := metadata.Pairs(trailingMetadataKey, trailingMetadata[0])
+			stream.SetTrailer(trailer)
+		}
+	}
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		status := in.GetResponseStatus()
+		if status != nil && *status.Code != 0 {
+			return grpc.Errorf(codes.Code(*status.Code), *status.Message)
+		}
+		cs := in.GetResponseParameters()
+		for _, c := range cs {
+			if us := c.GetIntervalUs(); us > 0 {
+				time.Sleep(time.Duration(us) * time.Microsecond)
+			}
+			pl, err := serverNewPayload(in.GetResponseType(), c.GetSize())
+			if err != nil {
+				return err
+			}
+			if err := stream.Send(&testpb.StreamingOutputCallResponse{
+				Payload: pl,
+			}); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+func (s *testServer) HalfDuplexCall(stream testpb.TestService_HalfDuplexCallServer) error {
+	var msgBuf []*testpb.StreamingOutputCallRequest
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			break
+		}
+		if err != nil {
+			return err
+		}
+		msgBuf = append(msgBuf, in)
+	}
+	for _, m := range msgBuf {
+		cs := m.GetResponseParameters()
+		for _, c := range cs {
+			if us := c.GetIntervalUs(); us > 0 {
+				time.Sleep(time.Duration(us) * time.Microsecond)
+			}
+			pl, err := serverNewPayload(m.GetResponseType(), c.GetSize())
+			if err != nil {
+				return err
+			}
+			if err := stream.Send(&testpb.StreamingOutputCallResponse{
+				Payload: pl,
+			}); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
diff --git a/vendor/google.golang.org/grpc/keepalive/keepalive.go b/vendor/google.golang.org/grpc/keepalive/keepalive.go
new file mode 100644
index 00000000000..b915a2ad494
--- /dev/null
+++ b/vendor/google.golang.org/grpc/keepalive/keepalive.go
@@ -0,0 +1,69 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package keepalive defines configurable parameters for point-to-point healthcheck.
+package keepalive
+
+import (
+	"time"
+)
+
+// ClientParameters is used to set keepalive parameters on the client-side.
+// These configure how the client will actively probe to notice when a connection broken
+// and to cause activity so intermediaries are aware the connection is still in use.
+type ClientParameters struct {
+	// After a duration of this time if the client doesn't see any activity it pings the server to see if the transport is still alive.
+	Time time.Duration // The current default value is infinity.
+	// After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that
+	// the connection is closed.
+	Timeout time.Duration // The current default value is 20 seconds.
+	// If true, client runs keepalive checks even with no active RPCs.
+	PermitWithoutStream bool
+}
+
+// ServerParameters is used to set keepalive and max-age parameters on the server-side.
+type ServerParameters struct {
+	// MaxConnectionIdle is a duration for the amount of time after which an idle connection would be closed by sending a GoAway.
+	// Idleness duration is defined since the most recent time the number of outstanding RPCs became zero or the connection establishment.
+	MaxConnectionIdle time.Duration
+	// MaxConnectionAge is a duration for the maximum amount of time a connection may exist before it will be closed by sending a GoAway.
+	// A random jitter of +/-10% will be added to MaxConnectionAge to spread out connection storms.
+	MaxConnectionAge time.Duration
+	// MaxConnectinoAgeGrace is an additive period after MaxConnectionAge after which the connection will be forcibly closed.
+	MaxConnectionAgeGrace time.Duration
+	// After a duration of this time if the server doesn't see any activity it pings the client to see if the transport is still alive.
+	Time time.Duration
+	// After having pinged for keepalive check, the server waits for a duration of Timeout and if no activity is seen even after that
+	// the connection is closed.
+	Timeout time.Duration
+}
diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go
new file mode 100644
index 00000000000..73323950286
--- /dev/null
+++ b/vendor/google.golang.org/grpc/metadata/metadata.go
@@ -0,0 +1,152 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package metadata define the structure of the metadata supported by gRPC library.
+// Please refer to http://www.grpc.io/docs/guides/wire.html for more information about custom-metadata.
+package metadata // import "google.golang.org/grpc/metadata"
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+
+	"golang.org/x/net/context"
+)
+
+const (
+	binHdrSuffix = "-bin"
+)
+
+// encodeKeyValue encodes key and value qualified for transmission via gRPC.
+// Transmitting binary headers violates HTTP/2 spec.
+// TODO(zhaoq): Maybe check if k is ASCII also.
+func encodeKeyValue(k, v string) (string, string) {
+	k = strings.ToLower(k)
+	if strings.HasSuffix(k, binHdrSuffix) {
+		val := base64.StdEncoding.EncodeToString([]byte(v))
+		v = string(val)
+	}
+	return k, v
+}
+
+// DecodeKeyValue returns the original key and value corresponding to the
+// encoded data in k, v.
+// If k is a binary header and v contains comma, v is split on comma before decoded,
+// and the decoded v will be joined with comma before returned.
+func DecodeKeyValue(k, v string) (string, string, error) {
+	if !strings.HasSuffix(k, binHdrSuffix) {
+		return k, v, nil
+	}
+	vvs := strings.Split(v, ",")
+	for i, vv := range vvs {
+		val, err := base64.StdEncoding.DecodeString(vv)
+		if err != nil {
+			return "", "", err
+		}
+		vvs[i] = string(val)
+	}
+	return k, strings.Join(vvs, ","), nil
+}
+
+// MD is a mapping from metadata keys to values. Users should use the following
+// two convenience functions New and Pairs to generate MD.
+type MD map[string][]string
+
+// New creates a MD from given key-value map.
+// Keys are automatically converted to lowercase. And for keys having "-bin" as suffix, their values will be applied Base64 encoding.
+func New(m map[string]string) MD {
+	md := MD{}
+	for k, v := range m {
+		key, val := encodeKeyValue(k, v)
+		md[key] = append(md[key], val)
+	}
+	return md
+}
+
+// Pairs returns an MD formed by the mapping of key, value ...
+// Pairs panics if len(kv) is odd.
+// Keys are automatically converted to lowercase. And for keys having "-bin" as suffix, their values will be appplied Base64 encoding.
+func Pairs(kv ...string) MD {
+	if len(kv)%2 == 1 {
+		panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv)))
+	}
+	md := MD{}
+	var k string
+	for i, s := range kv {
+		if i%2 == 0 {
+			k = s
+			continue
+		}
+		key, val := encodeKeyValue(k, s)
+		md[key] = append(md[key], val)
+	}
+	return md
+}
+
+// Len returns the number of items in md.
+func (md MD) Len() int {
+	return len(md)
+}
+
+// Copy returns a copy of md.
+func (md MD) Copy() MD {
+	return Join(md)
+}
+
+// Join joins any number of MDs into a single MD.
+// The order of values for each key is determined by the order in which
+// the MDs containing those values are presented to Join.
+func Join(mds ...MD) MD {
+	out := MD{}
+	for _, md := range mds {
+		for k, v := range md {
+			out[k] = append(out[k], v...)
+		}
+	}
+	return out
+}
+
+type mdKey struct{}
+
+// NewContext creates a new context with md attached.
+func NewContext(ctx context.Context, md MD) context.Context {
+	return context.WithValue(ctx, mdKey{}, md)
+}
+
+// FromContext returns the MD in ctx if it exists.
+// The returned md should be immutable, writing to it may cause races.
+// Modification should be made to the copies of the returned md.
+func FromContext(ctx context.Context) (md MD, ok bool) {
+	md, ok = ctx.Value(mdKey{}).(MD)
+	return
+}
diff --git a/vendor/google.golang.org/grpc/metadata/metadata_test.go b/vendor/google.golang.org/grpc/metadata/metadata_test.go
new file mode 100644
index 00000000000..fef0a0f815d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/metadata/metadata_test.go
@@ -0,0 +1,139 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package metadata
+
+import (
+	"reflect"
+	"testing"
+)
+
+const binaryValue = string(128)
+
+func TestEncodeKeyValue(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		kin string
+		vin string
+		// output
+		kout string
+		vout string
+	}{
+		{"key", "abc", "key", "abc"},
+		{"KEY", "abc", "key", "abc"},
+		{"key-bin", "abc", "key-bin", "YWJj"},
+		{"key-bin", binaryValue, "key-bin", "woA="},
+	} {
+		k, v := encodeKeyValue(test.kin, test.vin)
+		if k != test.kout || !reflect.DeepEqual(v, test.vout) {
+			t.Fatalf("encodeKeyValue(%q, %q) = %q, %q, want %q, %q", test.kin, test.vin, k, v, test.kout, test.vout)
+		}
+	}
+}
+
+func TestDecodeKeyValue(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		kin string
+		vin string
+		// output
+		kout string
+		vout string
+		err  error
+	}{
+		{"a", "abc", "a", "abc", nil},
+		{"key-bin", "Zm9vAGJhcg==", "key-bin", "foo\x00bar", nil},
+		{"key-bin", "woA=", "key-bin", binaryValue, nil},
+		{"a", "abc,efg", "a", "abc,efg", nil},
+		{"key-bin", "Zm9vAGJhcg==,Zm9vAGJhcg==", "key-bin", "foo\x00bar,foo\x00bar", nil},
+	} {
+		k, v, err := DecodeKeyValue(test.kin, test.vin)
+		if k != test.kout || !reflect.DeepEqual(v, test.vout) || !reflect.DeepEqual(err, test.err) {
+			t.Fatalf("DecodeKeyValue(%q, %q) = %q, %q, %v, want %q, %q, %v", test.kin, test.vin, k, v, err, test.kout, test.vout, test.err)
+		}
+	}
+}
+
+func TestPairsMD(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		kv []string
+		// output
+		md   MD
+		size int
+	}{
+		{[]string{}, MD{}, 0},
+		{[]string{"k1", "v1", "k2-bin", binaryValue}, New(map[string]string{
+			"k1":     "v1",
+			"k2-bin": binaryValue,
+		}), 2},
+	} {
+		md := Pairs(test.kv...)
+		if !reflect.DeepEqual(md, test.md) {
+			t.Fatalf("Pairs(%v) = %v, want %v", test.kv, md, test.md)
+		}
+		if md.Len() != test.size {
+			t.Fatalf("Pairs(%v) generates md of size %d, want %d", test.kv, md.Len(), test.size)
+		}
+	}
+}
+
+func TestCopy(t *testing.T) {
+	const key, val = "key", "val"
+	orig := Pairs(key, val)
+	copy := orig.Copy()
+	if !reflect.DeepEqual(orig, copy) {
+		t.Errorf("copied value not equal to the original, got %v, want %v", copy, orig)
+	}
+	orig[key][0] = "foo"
+	if v := copy[key][0]; v != val {
+		t.Errorf("change in original should not affect copy, got %q, want %q", v, val)
+	}
+}
+
+func TestJoin(t *testing.T) {
+	for _, test := range []struct {
+		mds  []MD
+		want MD
+	}{
+		{[]MD{}, MD{}},
+		{[]MD{Pairs("foo", "bar")}, Pairs("foo", "bar")},
+		{[]MD{Pairs("foo", "bar"), Pairs("foo", "baz")}, Pairs("foo", "bar", "foo", "baz")},
+		{[]MD{Pairs("foo", "bar"), Pairs("foo", "baz"), Pairs("zip", "zap")}, Pairs("foo", "bar", "foo", "baz", "zip", "zap")},
+	} {
+		md := Join(test.mds...)
+		if !reflect.DeepEqual(md, test.want) {
+			t.Errorf("context's metadata is %v, want %v", md, test.want)
+		}
+	}
+}
diff --git a/vendor/google.golang.org/grpc/naming/naming.go b/vendor/google.golang.org/grpc/naming/naming.go
new file mode 100644
index 00000000000..c2e0871e6f8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/naming/naming.go
@@ -0,0 +1,74 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package naming defines the naming API and related data structures for gRPC.
+// The interface is EXPERIMENTAL and may be suject to change.
+package naming
+
+// Operation defines the corresponding operations for a name resolution change.
+type Operation uint8
+
+const (
+	// Add indicates a new address is added.
+	Add Operation = iota
+	// Delete indicates an exisiting address is deleted.
+	Delete
+)
+
+// Update defines a name resolution update. Notice that it is not valid having both
+// empty string Addr and nil Metadata in an Update.
+type Update struct {
+	// Op indicates the operation of the update.
+	Op Operation
+	// Addr is the updated address. It is empty string if there is no address update.
+	Addr string
+	// Metadata is the updated metadata. It is nil if there is no metadata update.
+	// Metadata is not required for a custom naming implementation.
+	Metadata interface{}
+}
+
+// Resolver creates a Watcher for a target to track its resolution changes.
+type Resolver interface {
+	// Resolve creates a Watcher for target.
+	Resolve(target string) (Watcher, error)
+}
+
+// Watcher watches for the updates on the specified target.
+type Watcher interface {
+	// Next blocks until an update or error happens. It may return one or more
+	// updates. The first call should get the full set of the results. It should
+	// return an error if and only if Watcher cannot recover.
+	Next() ([]*Update, error)
+	// Close closes the Watcher.
+	Close()
+}
diff --git a/vendor/google.golang.org/grpc/peer/peer.go b/vendor/google.golang.org/grpc/peer/peer.go
new file mode 100644
index 00000000000..bfa6205ba9e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/peer/peer.go
@@ -0,0 +1,65 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package peer defines various peer information associated with RPCs and
+// corresponding utils.
+package peer
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/credentials"
+)
+
+// Peer contains the information of the peer for an RPC.
+type Peer struct {
+	// Addr is the peer address.
+	Addr net.Addr
+	// AuthInfo is the authentication information of the transport.
+	// It is nil if there is no transport security being used.
+	AuthInfo credentials.AuthInfo
+}
+
+type peerKey struct{}
+
+// NewContext creates a new context with peer information attached.
+func NewContext(ctx context.Context, p *Peer) context.Context {
+	return context.WithValue(ctx, peerKey{}, p)
+}
+
+// FromContext returns the peer information in ctx if it exists.
+func FromContext(ctx context.Context) (p *Peer, ok bool) {
+	p, ok = ctx.Value(peerKey{}).(*Peer)
+	return
+}
diff --git a/vendor/google.golang.org/grpc/reflection/README.md b/vendor/google.golang.org/grpc/reflection/README.md
new file mode 100644
index 00000000000..04b6371afcb
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/README.md
@@ -0,0 +1,18 @@
+# Reflection
+
+Package reflection implements server reflection service.
+
+The service implemented is defined in: https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+```go
+import "google.golang.org/grpc/reflection"
+
+s := grpc.NewServer()
+pb.RegisterYourOwnServer(s, &server{})
+
+// Register reflection service on gRPC server.
+reflection.Register(s)
+
+s.Serve(lis)
+```
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go
new file mode 100644
index 00000000000..76987a42095
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go
@@ -0,0 +1,694 @@
+// Code generated by protoc-gen-go.
+// source: reflection.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_reflection_v1alpha is a generated protocol buffer package.
+
+It is generated from these files:
+	reflection.proto
+
+It has these top-level messages:
+	ServerReflectionRequest
+	ExtensionRequest
+	ServerReflectionResponse
+	FileDescriptorResponse
+	ExtensionNumberResponse
+	ListServiceResponse
+	ServiceResponse
+	ErrorResponse
+*/
+package grpc_reflection_v1alpha
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The message sent by the client when calling ServerReflectionInfo method.
+type ServerReflectionRequest struct {
+	Host string `protobuf:"bytes,1,opt,name=host" json:"host,omitempty"`
+	// To use reflection service, the client should set one of the following
+	// fields in message_request. The server distinguishes requests by their
+	// defined field and then handles them using corresponding methods.
+	//
+	// Types that are valid to be assigned to MessageRequest:
+	//	*ServerReflectionRequest_FileByFilename
+	//	*ServerReflectionRequest_FileContainingSymbol
+	//	*ServerReflectionRequest_FileContainingExtension
+	//	*ServerReflectionRequest_AllExtensionNumbersOfType
+	//	*ServerReflectionRequest_ListServices
+	MessageRequest isServerReflectionRequest_MessageRequest `protobuf_oneof:"message_request"`
+}
+
+func (m *ServerReflectionRequest) Reset()                    { *m = ServerReflectionRequest{} }
+func (m *ServerReflectionRequest) String() string            { return proto.CompactTextString(m) }
+func (*ServerReflectionRequest) ProtoMessage()               {}
+func (*ServerReflectionRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type isServerReflectionRequest_MessageRequest interface {
+	isServerReflectionRequest_MessageRequest()
+}
+
+type ServerReflectionRequest_FileByFilename struct {
+	FileByFilename string `protobuf:"bytes,3,opt,name=file_by_filename,json=fileByFilename,oneof"`
+}
+type ServerReflectionRequest_FileContainingSymbol struct {
+	FileContainingSymbol string `protobuf:"bytes,4,opt,name=file_containing_symbol,json=fileContainingSymbol,oneof"`
+}
+type ServerReflectionRequest_FileContainingExtension struct {
+	FileContainingExtension *ExtensionRequest `protobuf:"bytes,5,opt,name=file_containing_extension,json=fileContainingExtension,oneof"`
+}
+type ServerReflectionRequest_AllExtensionNumbersOfType struct {
+	AllExtensionNumbersOfType string `protobuf:"bytes,6,opt,name=all_extension_numbers_of_type,json=allExtensionNumbersOfType,oneof"`
+}
+type ServerReflectionRequest_ListServices struct {
+	ListServices string `protobuf:"bytes,7,opt,name=list_services,json=listServices,oneof"`
+}
+
+func (*ServerReflectionRequest_FileByFilename) isServerReflectionRequest_MessageRequest()            {}
+func (*ServerReflectionRequest_FileContainingSymbol) isServerReflectionRequest_MessageRequest()      {}
+func (*ServerReflectionRequest_FileContainingExtension) isServerReflectionRequest_MessageRequest()   {}
+func (*ServerReflectionRequest_AllExtensionNumbersOfType) isServerReflectionRequest_MessageRequest() {}
+func (*ServerReflectionRequest_ListServices) isServerReflectionRequest_MessageRequest()              {}
+
+func (m *ServerReflectionRequest) GetMessageRequest() isServerReflectionRequest_MessageRequest {
+	if m != nil {
+		return m.MessageRequest
+	}
+	return nil
+}
+
+func (m *ServerReflectionRequest) GetFileByFilename() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileByFilename); ok {
+		return x.FileByFilename
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetFileContainingSymbol() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileContainingSymbol); ok {
+		return x.FileContainingSymbol
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetFileContainingExtension() *ExtensionRequest {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileContainingExtension); ok {
+		return x.FileContainingExtension
+	}
+	return nil
+}
+
+func (m *ServerReflectionRequest) GetAllExtensionNumbersOfType() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_AllExtensionNumbersOfType); ok {
+		return x.AllExtensionNumbersOfType
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetListServices() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_ListServices); ok {
+		return x.ListServices
+	}
+	return ""
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ServerReflectionRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ServerReflectionRequest_OneofMarshaler, _ServerReflectionRequest_OneofUnmarshaler, _ServerReflectionRequest_OneofSizer, []interface{}{
+		(*ServerReflectionRequest_FileByFilename)(nil),
+		(*ServerReflectionRequest_FileContainingSymbol)(nil),
+		(*ServerReflectionRequest_FileContainingExtension)(nil),
+		(*ServerReflectionRequest_AllExtensionNumbersOfType)(nil),
+		(*ServerReflectionRequest_ListServices)(nil),
+	}
+}
+
+func _ServerReflectionRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ServerReflectionRequest)
+	// message_request
+	switch x := m.MessageRequest.(type) {
+	case *ServerReflectionRequest_FileByFilename:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.FileByFilename)
+	case *ServerReflectionRequest_FileContainingSymbol:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.FileContainingSymbol)
+	case *ServerReflectionRequest_FileContainingExtension:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.FileContainingExtension); err != nil {
+			return err
+		}
+	case *ServerReflectionRequest_AllExtensionNumbersOfType:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.AllExtensionNumbersOfType)
+	case *ServerReflectionRequest_ListServices:
+		b.EncodeVarint(7<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.ListServices)
+	case nil:
+	default:
+		return fmt.Errorf("ServerReflectionRequest.MessageRequest has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ServerReflectionRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ServerReflectionRequest)
+	switch tag {
+	case 3: // message_request.file_by_filename
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_FileByFilename{x}
+		return true, err
+	case 4: // message_request.file_containing_symbol
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_FileContainingSymbol{x}
+		return true, err
+	case 5: // message_request.file_containing_extension
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ExtensionRequest)
+		err := b.DecodeMessage(msg)
+		m.MessageRequest = &ServerReflectionRequest_FileContainingExtension{msg}
+		return true, err
+	case 6: // message_request.all_extension_numbers_of_type
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_AllExtensionNumbersOfType{x}
+		return true, err
+	case 7: // message_request.list_services
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_ListServices{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ServerReflectionRequest_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ServerReflectionRequest)
+	// message_request
+	switch x := m.MessageRequest.(type) {
+	case *ServerReflectionRequest_FileByFilename:
+		n += proto.SizeVarint(3<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.FileByFilename)))
+		n += len(x.FileByFilename)
+	case *ServerReflectionRequest_FileContainingSymbol:
+		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.FileContainingSymbol)))
+		n += len(x.FileContainingSymbol)
+	case *ServerReflectionRequest_FileContainingExtension:
+		s := proto.Size(x.FileContainingExtension)
+		n += proto.SizeVarint(5<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionRequest_AllExtensionNumbersOfType:
+		n += proto.SizeVarint(6<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.AllExtensionNumbersOfType)))
+		n += len(x.AllExtensionNumbersOfType)
+	case *ServerReflectionRequest_ListServices:
+		n += proto.SizeVarint(7<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.ListServices)))
+		n += len(x.ListServices)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// The type name and extension number sent by the client when requesting
+// file_containing_extension.
+type ExtensionRequest struct {
+	// Fully-qualified type name. The format should be <package>.<type>
+	ContainingType  string `protobuf:"bytes,1,opt,name=containing_type,json=containingType" json:"containing_type,omitempty"`
+	ExtensionNumber int32  `protobuf:"varint,2,opt,name=extension_number,json=extensionNumber" json:"extension_number,omitempty"`
+}
+
+func (m *ExtensionRequest) Reset()                    { *m = ExtensionRequest{} }
+func (m *ExtensionRequest) String() string            { return proto.CompactTextString(m) }
+func (*ExtensionRequest) ProtoMessage()               {}
+func (*ExtensionRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+// The message sent by the server to answer ServerReflectionInfo method.
+type ServerReflectionResponse struct {
+	ValidHost       string                   `protobuf:"bytes,1,opt,name=valid_host,json=validHost" json:"valid_host,omitempty"`
+	OriginalRequest *ServerReflectionRequest `protobuf:"bytes,2,opt,name=original_request,json=originalRequest" json:"original_request,omitempty"`
+	// The server set one of the following fields accroding to the message_request
+	// in the request.
+	//
+	// Types that are valid to be assigned to MessageResponse:
+	//	*ServerReflectionResponse_FileDescriptorResponse
+	//	*ServerReflectionResponse_AllExtensionNumbersResponse
+	//	*ServerReflectionResponse_ListServicesResponse
+	//	*ServerReflectionResponse_ErrorResponse
+	MessageResponse isServerReflectionResponse_MessageResponse `protobuf_oneof:"message_response"`
+}
+
+func (m *ServerReflectionResponse) Reset()                    { *m = ServerReflectionResponse{} }
+func (m *ServerReflectionResponse) String() string            { return proto.CompactTextString(m) }
+func (*ServerReflectionResponse) ProtoMessage()               {}
+func (*ServerReflectionResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+type isServerReflectionResponse_MessageResponse interface {
+	isServerReflectionResponse_MessageResponse()
+}
+
+type ServerReflectionResponse_FileDescriptorResponse struct {
+	FileDescriptorResponse *FileDescriptorResponse `protobuf:"bytes,4,opt,name=file_descriptor_response,json=fileDescriptorResponse,oneof"`
+}
+type ServerReflectionResponse_AllExtensionNumbersResponse struct {
+	AllExtensionNumbersResponse *ExtensionNumberResponse `protobuf:"bytes,5,opt,name=all_extension_numbers_response,json=allExtensionNumbersResponse,oneof"`
+}
+type ServerReflectionResponse_ListServicesResponse struct {
+	ListServicesResponse *ListServiceResponse `protobuf:"bytes,6,opt,name=list_services_response,json=listServicesResponse,oneof"`
+}
+type ServerReflectionResponse_ErrorResponse struct {
+	ErrorResponse *ErrorResponse `protobuf:"bytes,7,opt,name=error_response,json=errorResponse,oneof"`
+}
+
+func (*ServerReflectionResponse_FileDescriptorResponse) isServerReflectionResponse_MessageResponse() {}
+func (*ServerReflectionResponse_AllExtensionNumbersResponse) isServerReflectionResponse_MessageResponse() {
+}
+func (*ServerReflectionResponse_ListServicesResponse) isServerReflectionResponse_MessageResponse() {}
+func (*ServerReflectionResponse_ErrorResponse) isServerReflectionResponse_MessageResponse()        {}
+
+func (m *ServerReflectionResponse) GetMessageResponse() isServerReflectionResponse_MessageResponse {
+	if m != nil {
+		return m.MessageResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetOriginalRequest() *ServerReflectionRequest {
+	if m != nil {
+		return m.OriginalRequest
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetFileDescriptorResponse() *FileDescriptorResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_FileDescriptorResponse); ok {
+		return x.FileDescriptorResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetAllExtensionNumbersResponse() *ExtensionNumberResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_AllExtensionNumbersResponse); ok {
+		return x.AllExtensionNumbersResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetListServicesResponse() *ListServiceResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_ListServicesResponse); ok {
+		return x.ListServicesResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetErrorResponse() *ErrorResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_ErrorResponse); ok {
+		return x.ErrorResponse
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ServerReflectionResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ServerReflectionResponse_OneofMarshaler, _ServerReflectionResponse_OneofUnmarshaler, _ServerReflectionResponse_OneofSizer, []interface{}{
+		(*ServerReflectionResponse_FileDescriptorResponse)(nil),
+		(*ServerReflectionResponse_AllExtensionNumbersResponse)(nil),
+		(*ServerReflectionResponse_ListServicesResponse)(nil),
+		(*ServerReflectionResponse_ErrorResponse)(nil),
+	}
+}
+
+func _ServerReflectionResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ServerReflectionResponse)
+	// message_response
+	switch x := m.MessageResponse.(type) {
+	case *ServerReflectionResponse_FileDescriptorResponse:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.FileDescriptorResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_AllExtensionNumbersResponse:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.AllExtensionNumbersResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_ListServicesResponse:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ListServicesResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_ErrorResponse:
+		b.EncodeVarint(7<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ErrorResponse); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("ServerReflectionResponse.MessageResponse has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ServerReflectionResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ServerReflectionResponse)
+	switch tag {
+	case 4: // message_response.file_descriptor_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(FileDescriptorResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_FileDescriptorResponse{msg}
+		return true, err
+	case 5: // message_response.all_extension_numbers_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ExtensionNumberResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_AllExtensionNumbersResponse{msg}
+		return true, err
+	case 6: // message_response.list_services_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ListServiceResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_ListServicesResponse{msg}
+		return true, err
+	case 7: // message_response.error_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ErrorResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_ErrorResponse{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ServerReflectionResponse_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ServerReflectionResponse)
+	// message_response
+	switch x := m.MessageResponse.(type) {
+	case *ServerReflectionResponse_FileDescriptorResponse:
+		s := proto.Size(x.FileDescriptorResponse)
+		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_AllExtensionNumbersResponse:
+		s := proto.Size(x.AllExtensionNumbersResponse)
+		n += proto.SizeVarint(5<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_ListServicesResponse:
+		s := proto.Size(x.ListServicesResponse)
+		n += proto.SizeVarint(6<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_ErrorResponse:
+		s := proto.Size(x.ErrorResponse)
+		n += proto.SizeVarint(7<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// Serialized FileDescriptorProto messages sent by the server answering
+// a file_by_filename, file_containing_symbol, or file_containing_extension
+// request.
+type FileDescriptorResponse struct {
+	// Serialized FileDescriptorProto messages. We avoid taking a dependency on
+	// descriptor.proto, which uses proto2 only features, by making them opaque
+	// bytes instead.
+	FileDescriptorProto [][]byte `protobuf:"bytes,1,rep,name=file_descriptor_proto,json=fileDescriptorProto,proto3" json:"file_descriptor_proto,omitempty"`
+}
+
+func (m *FileDescriptorResponse) Reset()                    { *m = FileDescriptorResponse{} }
+func (m *FileDescriptorResponse) String() string            { return proto.CompactTextString(m) }
+func (*FileDescriptorResponse) ProtoMessage()               {}
+func (*FileDescriptorResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+// A list of extension numbers sent by the server answering
+// all_extension_numbers_of_type request.
+type ExtensionNumberResponse struct {
+	// Full name of the base type, including the package name. The format
+	// is <package>.<type>
+	BaseTypeName    string  `protobuf:"bytes,1,opt,name=base_type_name,json=baseTypeName" json:"base_type_name,omitempty"`
+	ExtensionNumber []int32 `protobuf:"varint,2,rep,name=extension_number,json=extensionNumber" json:"extension_number,omitempty"`
+}
+
+func (m *ExtensionNumberResponse) Reset()                    { *m = ExtensionNumberResponse{} }
+func (m *ExtensionNumberResponse) String() string            { return proto.CompactTextString(m) }
+func (*ExtensionNumberResponse) ProtoMessage()               {}
+func (*ExtensionNumberResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+// A list of ServiceResponse sent by the server answering list_services request.
+type ListServiceResponse struct {
+	// The information of each service may be expanded in the future, so we use
+	// ServiceResponse message to encapsulate it.
+	Service []*ServiceResponse `protobuf:"bytes,1,rep,name=service" json:"service,omitempty"`
+}
+
+func (m *ListServiceResponse) Reset()                    { *m = ListServiceResponse{} }
+func (m *ListServiceResponse) String() string            { return proto.CompactTextString(m) }
+func (*ListServiceResponse) ProtoMessage()               {}
+func (*ListServiceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *ListServiceResponse) GetService() []*ServiceResponse {
+	if m != nil {
+		return m.Service
+	}
+	return nil
+}
+
+// The information of a single service used by ListServiceResponse to answer
+// list_services request.
+type ServiceResponse struct {
+	// Full name of a registered service, including its package name. The format
+	// is <package>.<service>
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+}
+
+func (m *ServiceResponse) Reset()                    { *m = ServiceResponse{} }
+func (m *ServiceResponse) String() string            { return proto.CompactTextString(m) }
+func (*ServiceResponse) ProtoMessage()               {}
+func (*ServiceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+// The error code and error message sent by the server when an error occurs.
+type ErrorResponse struct {
+	// This field uses the error codes defined in grpc::StatusCode.
+	ErrorCode    int32  `protobuf:"varint,1,opt,name=error_code,json=errorCode" json:"error_code,omitempty"`
+	ErrorMessage string `protobuf:"bytes,2,opt,name=error_message,json=errorMessage" json:"error_message,omitempty"`
+}
+
+func (m *ErrorResponse) Reset()                    { *m = ErrorResponse{} }
+func (m *ErrorResponse) String() string            { return proto.CompactTextString(m) }
+func (*ErrorResponse) ProtoMessage()               {}
+func (*ErrorResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func init() {
+	proto.RegisterType((*ServerReflectionRequest)(nil), "grpc.reflection.v1alpha.ServerReflectionRequest")
+	proto.RegisterType((*ExtensionRequest)(nil), "grpc.reflection.v1alpha.ExtensionRequest")
+	proto.RegisterType((*ServerReflectionResponse)(nil), "grpc.reflection.v1alpha.ServerReflectionResponse")
+	proto.RegisterType((*FileDescriptorResponse)(nil), "grpc.reflection.v1alpha.FileDescriptorResponse")
+	proto.RegisterType((*ExtensionNumberResponse)(nil), "grpc.reflection.v1alpha.ExtensionNumberResponse")
+	proto.RegisterType((*ListServiceResponse)(nil), "grpc.reflection.v1alpha.ListServiceResponse")
+	proto.RegisterType((*ServiceResponse)(nil), "grpc.reflection.v1alpha.ServiceResponse")
+	proto.RegisterType((*ErrorResponse)(nil), "grpc.reflection.v1alpha.ErrorResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for ServerReflection service
+
+type ServerReflectionClient interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error)
+}
+
+type serverReflectionClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewServerReflectionClient(cc *grpc.ClientConn) ServerReflectionClient {
+	return &serverReflectionClient{cc}
+}
+
+func (c *serverReflectionClient) ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_ServerReflection_serviceDesc.Streams[0], c.cc, "/grpc.reflection.v1alpha.ServerReflection/ServerReflectionInfo", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &serverReflectionServerReflectionInfoClient{stream}
+	return x, nil
+}
+
+type ServerReflection_ServerReflectionInfoClient interface {
+	Send(*ServerReflectionRequest) error
+	Recv() (*ServerReflectionResponse, error)
+	grpc.ClientStream
+}
+
+type serverReflectionServerReflectionInfoClient struct {
+	grpc.ClientStream
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Send(m *ServerReflectionRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Recv() (*ServerReflectionResponse, error) {
+	m := new(ServerReflectionResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for ServerReflection service
+
+type ServerReflectionServer interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error
+}
+
+func RegisterServerReflectionServer(s *grpc.Server, srv ServerReflectionServer) {
+	s.RegisterService(&_ServerReflection_serviceDesc, srv)
+}
+
+func _ServerReflection_ServerReflectionInfo_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(ServerReflectionServer).ServerReflectionInfo(&serverReflectionServerReflectionInfoServer{stream})
+}
+
+type ServerReflection_ServerReflectionInfoServer interface {
+	Send(*ServerReflectionResponse) error
+	Recv() (*ServerReflectionRequest, error)
+	grpc.ServerStream
+}
+
+type serverReflectionServerReflectionInfoServer struct {
+	grpc.ServerStream
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Send(m *ServerReflectionResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Recv() (*ServerReflectionRequest, error) {
+	m := new(ServerReflectionRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _ServerReflection_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.reflection.v1alpha.ServerReflection",
+	HandlerType: (*ServerReflectionServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ServerReflectionInfo",
+			Handler:       _ServerReflection_ServerReflectionInfo_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "reflection.proto",
+}
+
+func init() { proto.RegisterFile("reflection.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 646 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x54, 0xdd, 0x6e, 0xd3, 0x4c,
+	0x10, 0xfd, 0xd2, 0xe6, 0x47, 0x99, 0xfc, 0xf9, 0xdb, 0x86, 0xc4, 0x05, 0x15, 0x21, 0x43, 0x21,
+	0x45, 0x28, 0xb4, 0x46, 0xe2, 0x01, 0x52, 0x40, 0x45, 0x2a, 0x2d, 0x72, 0xb8, 0x41, 0x5c, 0x58,
+	0x8e, 0xb3, 0x4e, 0x0d, 0x8e, 0xd7, 0xec, 0xba, 0x81, 0x5c, 0xf1, 0x10, 0x3c, 0x14, 0xaf, 0xc4,
+	0x25, 0xbb, 0xeb, 0x9f, 0x38, 0xae, 0x0d, 0xea, 0x95, 0xad, 0xb3, 0x33, 0x7b, 0x66, 0xe6, 0x9c,
+	0x59, 0x50, 0x28, 0x76, 0x3c, 0x6c, 0x87, 0x2e, 0xf1, 0xc7, 0x01, 0x25, 0x21, 0x41, 0xc3, 0x05,
+	0x0d, 0xec, 0x71, 0x06, 0x5e, 0x9d, 0x58, 0x5e, 0x70, 0x65, 0x69, 0xbf, 0x77, 0x60, 0x38, 0xc5,
+	0x74, 0x85, 0xa9, 0x91, 0x1e, 0x1a, 0xf8, 0xeb, 0x35, 0x66, 0x21, 0x42, 0x50, 0xbd, 0x22, 0x2c,
+	0x54, 0x2b, 0x0f, 0x2a, 0xa3, 0xa6, 0x21, 0xff, 0xd1, 0x53, 0x50, 0x1c, 0xd7, 0xc3, 0xe6, 0x6c,
+	0x6d, 0x8a, 0xaf, 0x6f, 0x2d, 0xb1, 0xba, 0x2b, 0xce, 0xcf, 0xfe, 0x33, 0xba, 0x02, 0x99, 0xac,
+	0xdf, 0xc4, 0x38, 0x7a, 0x09, 0x03, 0x19, 0x6b, 0x13, 0x3f, 0xb4, 0x5c, 0xdf, 0xf5, 0x17, 0x26,
+	0x5b, 0x2f, 0x67, 0xc4, 0x53, 0xab, 0x71, 0x46, 0x5f, 0x9c, 0x9f, 0xa6, 0xc7, 0x53, 0x79, 0x8a,
+	0x16, 0xb0, 0x9f, 0xcf, 0xc3, 0xdf, 0x43, 0xec, 0x33, 0x5e, 0x9b, 0x5a, 0xe3, 0xa9, 0x2d, 0xfd,
+	0x68, 0x5c, 0xd2, 0xd0, 0xf8, 0x75, 0x12, 0x19, 0x77, 0xc1, 0x59, 0x86, 0xdb, 0x2c, 0x69, 0x04,
+	0x9a, 0xc0, 0x81, 0xe5, 0x79, 0x9b, 0xcb, 0x4d, 0xff, 0x7a, 0x39, 0xc3, 0x94, 0x99, 0xc4, 0x31,
+	0xc3, 0x75, 0x80, 0xd5, 0x7a, 0x5c, 0xe7, 0x3e, 0x0f, 0x4b, 0xd3, 0x2e, 0xa2, 0xa0, 0x4b, 0xe7,
+	0x03, 0x0f, 0x41, 0x87, 0xd0, 0xf1, 0x5c, 0x16, 0x9a, 0x8c, 0x0f, 0xd1, 0xb5, 0x31, 0x53, 0x1b,
+	0x71, 0x4e, 0x5b, 0xc0, 0xd3, 0x18, 0x9d, 0xfc, 0x0f, 0xbd, 0x25, 0x66, 0xcc, 0x5a, 0x60, 0x93,
+	0x46, 0x85, 0x69, 0x0e, 0x28, 0xf9, 0x62, 0xd1, 0x13, 0xe8, 0x65, 0xba, 0x96, 0x35, 0x44, 0xd3,
+	0xef, 0x6e, 0x60, 0x49, 0x7b, 0x04, 0x4a, 0xbe, 0x6c, 0x75, 0x87, 0x47, 0xd6, 0x8c, 0x1e, 0xde,
+	0x2e, 0x54, 0xfb, 0x55, 0x05, 0xf5, 0xa6, 0xc4, 0x2c, 0x20, 0x3e, 0xc3, 0xe8, 0x00, 0x60, 0x65,
+	0x79, 0xee, 0xdc, 0xcc, 0x28, 0xdd, 0x94, 0xc8, 0x99, 0x90, 0xfb, 0x13, 0x28, 0x84, 0xba, 0x0b,
+	0xd7, 0xb7, 0xbc, 0xa4, 0x6e, 0x49, 0xd3, 0xd2, 0x8f, 0x4b, 0x15, 0x28, 0xb1, 0x93, 0xd1, 0x4b,
+	0x6e, 0x4a, 0x9a, 0xfd, 0x02, 0xaa, 0xd4, 0x79, 0x8e, 0x99, 0x4d, 0xdd, 0x20, 0x24, 0x94, 0x73,
+	0x44, 0x75, 0x49, 0x87, 0xb4, 0xf4, 0xe7, 0xa5, 0x24, 0xc2, 0x64, 0xaf, 0xd2, 0xbc, 0xa4, 0x1d,
+	0x3e, 0x76, 0x69, 0xb9, 0x9b, 0x27, 0xe8, 0x1b, 0xdc, 0x2f, 0xd6, 0x3a, 0xa5, 0xac, 0xfd, 0xa3,
+	0xaf, 0x9c, 0x01, 0x32, 0x9c, 0xf7, 0x0a, 0xec, 0x91, 0x12, 0xcf, 0x61, 0xb0, 0x65, 0x90, 0x0d,
+	0x61, 0x5d, 0x12, 0x3e, 0x2b, 0x25, 0x3c, 0xdf, 0x18, 0x28, 0x43, 0xd6, 0xcf, 0xfa, 0x2a, 0x65,
+	0xb9, 0x84, 0x2e, 0xa6, 0x34, 0x3b, 0xc1, 0x86, 0xbc, 0xfd, 0x71, 0x79, 0x3b, 0x22, 0x3c, 0x73,
+	0x6f, 0x07, 0x67, 0x81, 0x09, 0x02, 0x65, 0x63, 0xd8, 0x08, 0xd3, 0xce, 0x61, 0x50, 0x3c, 0x77,
+	0xa4, 0xc3, 0x9d, 0xbc, 0x94, 0xf2, 0xe1, 0xe1, 0x8e, 0xda, 0x1d, 0xb5, 0x8d, 0xbd, 0x6d, 0x51,
+	0xde, 0x8b, 0x23, 0xed, 0x33, 0x0c, 0x4b, 0x46, 0x8a, 0x1e, 0x41, 0x77, 0x66, 0x31, 0x2c, 0x17,
+	0xc0, 0x94, 0x6f, 0x4c, 0xe4, 0xcc, 0xb6, 0x40, 0x85, 0xff, 0x2f, 0xc4, 0xfb, 0x52, 0xbc, 0x03,
+	0xbb, 0x45, 0x3b, 0xf0, 0x11, 0xf6, 0x0a, 0xa6, 0xc9, 0x1f, 0x80, 0x46, 0x2c, 0x8b, 0x2c, 0xb4,
+	0xa5, 0x8f, 0xfe, 0xea, 0xea, 0x4c, 0xaa, 0x91, 0x24, 0x6a, 0x87, 0xd0, 0xcb, 0x5f, 0xcb, 0x1f,
+	0xce, 0x4c, 0xd1, 0xf2, 0x5f, 0x9b, 0x42, 0x67, 0x6b, 0xe2, 0x62, 0xf3, 0x22, 0xc5, 0x6c, 0x32,
+	0x8f, 0x42, 0x6b, 0x46, 0x53, 0x22, 0xa7, 0x1c, 0x40, 0x0f, 0x21, 0x12, 0xc4, 0x8c, 0x55, 0x90,
+	0x6b, 0xc7, 0x27, 0x20, 0xc1, 0x77, 0x11, 0xa6, 0xff, 0xac, 0x80, 0x92, 0x5f, 0x37, 0xf4, 0x03,
+	0xfa, 0x79, 0xec, 0xad, 0xef, 0x10, 0x74, 0xeb, 0x8d, 0xbd, 0x7b, 0x72, 0x8b, 0x8c, 0xa8, 0xab,
+	0x51, 0xe5, 0xb8, 0x32, 0xab, 0x4b, 0xe9, 0x5f, 0xfc, 0x09, 0x00, 0x00, 0xff, 0xff, 0xe9, 0x3f,
+	0x7b, 0x08, 0x87, 0x06, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto
new file mode 100644
index 00000000000..276ff0e255d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto
@@ -0,0 +1,151 @@
+// Copyright 2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Service exported by server reflection
+
+syntax = "proto3";
+
+package grpc.reflection.v1alpha;
+
+service ServerReflection {
+  // The reflection service is structured as a bidirectional stream, ensuring
+  // all related requests go to a single server.
+  rpc ServerReflectionInfo(stream ServerReflectionRequest)
+      returns (stream ServerReflectionResponse);
+}
+
+// The message sent by the client when calling ServerReflectionInfo method.
+message ServerReflectionRequest {
+  string host = 1;
+  // To use reflection service, the client should set one of the following
+  // fields in message_request. The server distinguishes requests by their
+  // defined field and then handles them using corresponding methods.
+  oneof message_request {
+    // Find a proto file by the file name.
+    string file_by_filename = 3;
+
+    // Find the proto file that declares the given fully-qualified symbol name.
+    // This field should be a fully-qualified symbol name
+    // (e.g. <package>.<service>[.<method>] or <package>.<type>).
+    string file_containing_symbol = 4;
+
+    // Find the proto file which defines an extension extending the given
+    // message type with the given field number.
+    ExtensionRequest file_containing_extension = 5;
+
+    // Finds the tag numbers used by all known extensions of extendee_type, and
+    // appends them to ExtensionNumberResponse in an undefined order.
+    // Its corresponding method is best-effort: it's not guaranteed that the
+    // reflection service will implement this method, and it's not guaranteed
+    // that this method will provide all extensions. Returns
+    // StatusCode::UNIMPLEMENTED if it's not implemented.
+    // This field should be a fully-qualified type name. The format is
+    // <package>.<type>
+    string all_extension_numbers_of_type = 6;
+
+    // List the full names of registered services. The content will not be
+    // checked.
+    string list_services = 7;
+  }
+}
+
+// The type name and extension number sent by the client when requesting
+// file_containing_extension.
+message ExtensionRequest {
+  // Fully-qualified type name. The format should be <package>.<type>
+  string containing_type = 1;
+  int32 extension_number = 2;
+}
+
+// The message sent by the server to answer ServerReflectionInfo method.
+message ServerReflectionResponse {
+  string valid_host = 1;
+  ServerReflectionRequest original_request = 2;
+  // The server set one of the following fields accroding to the message_request
+  // in the request.
+  oneof message_response {
+    // This message is used to answer file_by_filename, file_containing_symbol,
+    // file_containing_extension requests with transitive dependencies. As
+    // the repeated label is not allowed in oneof fields, we use a
+    // FileDescriptorResponse message to encapsulate the repeated fields.
+    // The reflection service is allowed to avoid sending FileDescriptorProtos
+    // that were previously sent in response to earlier requests in the stream.
+    FileDescriptorResponse file_descriptor_response = 4;
+
+    // This message is used to answer all_extension_numbers_of_type requst.
+    ExtensionNumberResponse all_extension_numbers_response = 5;
+
+    // This message is used to answer list_services request.
+    ListServiceResponse list_services_response = 6;
+
+    // This message is used when an error occurs.
+    ErrorResponse error_response = 7;
+  }
+}
+
+// Serialized FileDescriptorProto messages sent by the server answering
+// a file_by_filename, file_containing_symbol, or file_containing_extension
+// request.
+message FileDescriptorResponse {
+  // Serialized FileDescriptorProto messages. We avoid taking a dependency on
+  // descriptor.proto, which uses proto2 only features, by making them opaque
+  // bytes instead.
+  repeated bytes file_descriptor_proto = 1;
+}
+
+// A list of extension numbers sent by the server answering
+// all_extension_numbers_of_type request.
+message ExtensionNumberResponse {
+  // Full name of the base type, including the package name. The format
+  // is <package>.<type>
+  string base_type_name = 1;
+  repeated int32 extension_number = 2;
+}
+
+// A list of ServiceResponse sent by the server answering list_services request.
+message ListServiceResponse {
+  // The information of each service may be expanded in the future, so we use
+  // ServiceResponse message to encapsulate it.
+  repeated ServiceResponse service = 1;
+}
+
+// The information of a single service used by ListServiceResponse to answer
+// list_services request.
+message ServiceResponse {
+  // Full name of a registered service, including its package name. The format
+  // is <package>.<service>
+  string name = 1;
+}
+
+// The error code and error message sent by the server when an error occurs.
+message ErrorResponse {
+  // This field uses the error codes defined in grpc::StatusCode.
+  int32 error_code = 1;
+  string error_message = 2;
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.pb.go
new file mode 100644
index 00000000000..0b503d665fc
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.pb.go
@@ -0,0 +1,78 @@
+// Code generated by protoc-gen-go.
+// source: proto2.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	proto2.proto
+	proto2_ext.proto
+	proto2_ext2.proto
+	test.proto
+
+It has these top-level messages:
+	ToBeExtended
+	Extension
+	AnotherExtension
+	SearchResponse
+	SearchRequest
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type ToBeExtended struct {
+	Foo                          *int32 `protobuf:"varint,1,req,name=foo" json:"foo,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *ToBeExtended) Reset()                    { *m = ToBeExtended{} }
+func (m *ToBeExtended) String() string            { return proto.CompactTextString(m) }
+func (*ToBeExtended) ProtoMessage()               {}
+func (*ToBeExtended) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+var extRange_ToBeExtended = []proto.ExtensionRange{
+	{10, 30},
+}
+
+func (*ToBeExtended) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_ToBeExtended
+}
+
+func (m *ToBeExtended) GetFoo() int32 {
+	if m != nil && m.Foo != nil {
+		return *m.Foo
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*ToBeExtended)(nil), "grpc.testing.ToBeExtended")
+}
+
+func init() { proto.RegisterFile("proto2.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 86 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0x29, 0x28, 0xca, 0x2f,
+	0xc9, 0x37, 0xd2, 0x03, 0x53, 0x42, 0x3c, 0xe9, 0x45, 0x05, 0xc9, 0x7a, 0x25, 0xa9, 0xc5, 0x25,
+	0x99, 0x79, 0xe9, 0x4a, 0x6a, 0x5c, 0x3c, 0x21, 0xf9, 0x4e, 0xa9, 0xae, 0x15, 0x25, 0xa9, 0x79,
+	0x29, 0xa9, 0x29, 0x42, 0x02, 0x5c, 0xcc, 0x69, 0xf9, 0xf9, 0x12, 0x8c, 0x0a, 0x4c, 0x1a, 0xac,
+	0x41, 0x20, 0xa6, 0x16, 0x0b, 0x07, 0x97, 0x80, 0x3c, 0x20, 0x00, 0x00, 0xff, 0xff, 0x74, 0x86,
+	0x9c, 0x08, 0x44, 0x00, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.proto b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.proto
new file mode 100644
index 00000000000..6b120f320c8
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2.proto
@@ -0,0 +1,8 @@
+syntax = "proto2";
+
+package grpc.testing;
+
+message ToBeExtended {
+  required int32 foo = 1;
+  extensions 10 to 30;
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.pb.go
new file mode 100644
index 00000000000..dbd09425fed
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.pb.go
@@ -0,0 +1,83 @@
+// Code generated by protoc-gen-go.
+// source: proto2_ext.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type Extension struct {
+	Whatzit          *int32 `protobuf:"varint,1,opt,name=whatzit" json:"whatzit,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Extension) Reset()                    { *m = Extension{} }
+func (m *Extension) String() string            { return proto.CompactTextString(m) }
+func (*Extension) ProtoMessage()               {}
+func (*Extension) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+func (m *Extension) GetWhatzit() int32 {
+	if m != nil && m.Whatzit != nil {
+		return *m.Whatzit
+	}
+	return 0
+}
+
+var E_Foo = &proto.ExtensionDesc{
+	ExtendedType:  (*ToBeExtended)(nil),
+	ExtensionType: (*int32)(nil),
+	Field:         13,
+	Name:          "grpc.testing.foo",
+	Tag:           "varint,13,opt,name=foo",
+	Filename:      "proto2_ext.proto",
+}
+
+var E_Bar = &proto.ExtensionDesc{
+	ExtendedType:  (*ToBeExtended)(nil),
+	ExtensionType: (*Extension)(nil),
+	Field:         17,
+	Name:          "grpc.testing.bar",
+	Tag:           "bytes,17,opt,name=bar",
+	Filename:      "proto2_ext.proto",
+}
+
+var E_Baz = &proto.ExtensionDesc{
+	ExtendedType:  (*ToBeExtended)(nil),
+	ExtensionType: (*SearchRequest)(nil),
+	Field:         19,
+	Name:          "grpc.testing.baz",
+	Tag:           "bytes,19,opt,name=baz",
+	Filename:      "proto2_ext.proto",
+}
+
+func init() {
+	proto.RegisterType((*Extension)(nil), "grpc.testing.Extension")
+	proto.RegisterExtension(E_Foo)
+	proto.RegisterExtension(E_Bar)
+	proto.RegisterExtension(E_Baz)
+}
+
+func init() { proto.RegisterFile("proto2_ext.proto", fileDescriptor1) }
+
+var fileDescriptor1 = []byte{
+	// 179 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0x12, 0x28, 0x28, 0xca, 0x2f,
+	0xc9, 0x37, 0x8a, 0x4f, 0xad, 0x28, 0xd1, 0x03, 0x33, 0x85, 0x78, 0xd2, 0x8b, 0x0a, 0x92, 0xf5,
+	0x4a, 0x52, 0x8b, 0x4b, 0x32, 0xf3, 0xd2, 0xa5, 0x78, 0x20, 0xf2, 0x10, 0x39, 0x29, 0x2e, 0x90,
+	0x30, 0x84, 0xad, 0xa4, 0xca, 0xc5, 0xe9, 0x5a, 0x51, 0x92, 0x9a, 0x57, 0x9c, 0x99, 0x9f, 0x27,
+	0x24, 0xc1, 0xc5, 0x5e, 0x9e, 0x91, 0x58, 0x52, 0x95, 0x59, 0x22, 0xc1, 0xa8, 0xc0, 0xa8, 0xc1,
+	0x1a, 0x04, 0xe3, 0x5a, 0xe9, 0x70, 0x31, 0xa7, 0xe5, 0xe7, 0x0b, 0x49, 0xe9, 0x21, 0x1b, 0xab,
+	0x17, 0x92, 0xef, 0x94, 0x0a, 0xd6, 0x9d, 0x92, 0x9a, 0x22, 0xc1, 0x0b, 0xd6, 0x01, 0x52, 0x66,
+	0xe5, 0xca, 0xc5, 0x9c, 0x94, 0x58, 0x84, 0x57, 0xb5, 0xa0, 0x02, 0xa3, 0x06, 0xb7, 0x91, 0x38,
+	0xaa, 0x0a, 0xb8, 0x4b, 0x82, 0x40, 0xfa, 0xad, 0x3c, 0x41, 0xc6, 0x54, 0xe1, 0x35, 0x46, 0x18,
+	0x6c, 0x8c, 0x34, 0xaa, 0x8a, 0xe0, 0xd4, 0xc4, 0xa2, 0xe4, 0x8c, 0xa0, 0xd4, 0xc2, 0xd2, 0xd4,
+	0xe2, 0x12, 0x90, 0x51, 0x55, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x71, 0x6b, 0x94, 0x9f, 0x21,
+	0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.proto b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.proto
new file mode 100644
index 00000000000..b669141f4e2
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext.proto
@@ -0,0 +1,16 @@
+syntax = "proto2";
+
+package grpc.testing;
+
+import "proto2.proto";
+import "test.proto";
+
+extend ToBeExtended {
+  optional int32 foo = 13;
+  optional Extension bar = 17;
+  optional SearchRequest baz = 19;
+}
+
+message Extension {
+  optional int32 whatzit = 1;
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.pb.go
new file mode 100644
index 00000000000..0aaec7c9a6c
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.pb.go
@@ -0,0 +1,72 @@
+// Code generated by protoc-gen-go.
+// source: proto2_ext2.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type AnotherExtension struct {
+	Whatchamacallit  *int32 `protobuf:"varint,1,opt,name=whatchamacallit" json:"whatchamacallit,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *AnotherExtension) Reset()                    { *m = AnotherExtension{} }
+func (m *AnotherExtension) String() string            { return proto.CompactTextString(m) }
+func (*AnotherExtension) ProtoMessage()               {}
+func (*AnotherExtension) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{0} }
+
+func (m *AnotherExtension) GetWhatchamacallit() int32 {
+	if m != nil && m.Whatchamacallit != nil {
+		return *m.Whatchamacallit
+	}
+	return 0
+}
+
+var E_Frob = &proto.ExtensionDesc{
+	ExtendedType:  (*ToBeExtended)(nil),
+	ExtensionType: (*string)(nil),
+	Field:         23,
+	Name:          "grpc.testing.frob",
+	Tag:           "bytes,23,opt,name=frob",
+	Filename:      "proto2_ext2.proto",
+}
+
+var E_Nitz = &proto.ExtensionDesc{
+	ExtendedType:  (*ToBeExtended)(nil),
+	ExtensionType: (*AnotherExtension)(nil),
+	Field:         29,
+	Name:          "grpc.testing.nitz",
+	Tag:           "bytes,29,opt,name=nitz",
+	Filename:      "proto2_ext2.proto",
+}
+
+func init() {
+	proto.RegisterType((*AnotherExtension)(nil), "grpc.testing.AnotherExtension")
+	proto.RegisterExtension(E_Frob)
+	proto.RegisterExtension(E_Nitz)
+}
+
+func init() { proto.RegisterFile("proto2_ext2.proto", fileDescriptor2) }
+
+var fileDescriptor2 = []byte{
+	// 165 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0x12, 0x2c, 0x28, 0xca, 0x2f,
+	0xc9, 0x37, 0x8a, 0x4f, 0xad, 0x28, 0x31, 0xd2, 0x03, 0xb3, 0x85, 0x78, 0xd2, 0x8b, 0x0a, 0x92,
+	0xf5, 0x4a, 0x52, 0x8b, 0x4b, 0x32, 0xf3, 0xd2, 0xa5, 0x78, 0x20, 0x0a, 0x20, 0x72, 0x4a, 0x36,
+	0x5c, 0x02, 0x8e, 0x79, 0xf9, 0x25, 0x19, 0xa9, 0x45, 0xae, 0x15, 0x25, 0xa9, 0x79, 0xc5, 0x99,
+	0xf9, 0x79, 0x42, 0x1a, 0x5c, 0xfc, 0xe5, 0x19, 0x89, 0x25, 0xc9, 0x19, 0x89, 0xb9, 0x89, 0xc9,
+	0x89, 0x39, 0x39, 0x99, 0x25, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0xac, 0x41, 0xe8, 0xc2, 0x56, 0x7a,
+	0x5c, 0x2c, 0x69, 0x45, 0xf9, 0x49, 0x42, 0x52, 0x7a, 0xc8, 0x56, 0xe8, 0x85, 0xe4, 0x3b, 0xa5,
+	0x82, 0x8d, 0x4b, 0x49, 0x4d, 0x91, 0x10, 0x57, 0x60, 0xd4, 0xe0, 0x0c, 0x02, 0xab, 0xb3, 0xf2,
+	0xe3, 0x62, 0xc9, 0xcb, 0x2c, 0xa9, 0xc2, 0xab, 0x5e, 0x56, 0x81, 0x51, 0x83, 0xdb, 0x48, 0x0e,
+	0x55, 0x05, 0xba, 0x1b, 0x83, 0xc0, 0xe6, 0x00, 0x02, 0x00, 0x00, 0xff, 0xff, 0xf0, 0x7e, 0x0d,
+	0x26, 0xed, 0x00, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.proto b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.proto
new file mode 100644
index 00000000000..16fa69e62e5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/proto2_ext2.proto
@@ -0,0 +1,14 @@
+syntax = "proto2";
+
+package grpc.testing;
+
+import "proto2.proto";
+
+extend ToBeExtended {
+  optional string frob = 23;
+  optional AnotherExtension nitz = 29;
+}
+
+message AnotherExtension {
+  optional int32 whatchamacallit = 1;
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/test.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_testing/test.pb.go
new file mode 100644
index 00000000000..27d71fc89e4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/test.pb.go
@@ -0,0 +1,248 @@
+// Code generated by protoc-gen-go.
+// source: test.proto
+// DO NOT EDIT!
+
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+type SearchResponse struct {
+	Results []*SearchResponse_Result `protobuf:"bytes,1,rep,name=results" json:"results,omitempty"`
+}
+
+func (m *SearchResponse) Reset()                    { *m = SearchResponse{} }
+func (m *SearchResponse) String() string            { return proto.CompactTextString(m) }
+func (*SearchResponse) ProtoMessage()               {}
+func (*SearchResponse) Descriptor() ([]byte, []int) { return fileDescriptor3, []int{0} }
+
+func (m *SearchResponse) GetResults() []*SearchResponse_Result {
+	if m != nil {
+		return m.Results
+	}
+	return nil
+}
+
+type SearchResponse_Result struct {
+	Url      string   `protobuf:"bytes,1,opt,name=url" json:"url,omitempty"`
+	Title    string   `protobuf:"bytes,2,opt,name=title" json:"title,omitempty"`
+	Snippets []string `protobuf:"bytes,3,rep,name=snippets" json:"snippets,omitempty"`
+}
+
+func (m *SearchResponse_Result) Reset()                    { *m = SearchResponse_Result{} }
+func (m *SearchResponse_Result) String() string            { return proto.CompactTextString(m) }
+func (*SearchResponse_Result) ProtoMessage()               {}
+func (*SearchResponse_Result) Descriptor() ([]byte, []int) { return fileDescriptor3, []int{0, 0} }
+
+func (m *SearchResponse_Result) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
+func (m *SearchResponse_Result) GetTitle() string {
+	if m != nil {
+		return m.Title
+	}
+	return ""
+}
+
+func (m *SearchResponse_Result) GetSnippets() []string {
+	if m != nil {
+		return m.Snippets
+	}
+	return nil
+}
+
+type SearchRequest struct {
+	Query string `protobuf:"bytes,1,opt,name=query" json:"query,omitempty"`
+}
+
+func (m *SearchRequest) Reset()                    { *m = SearchRequest{} }
+func (m *SearchRequest) String() string            { return proto.CompactTextString(m) }
+func (*SearchRequest) ProtoMessage()               {}
+func (*SearchRequest) Descriptor() ([]byte, []int) { return fileDescriptor3, []int{1} }
+
+func (m *SearchRequest) GetQuery() string {
+	if m != nil {
+		return m.Query
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*SearchResponse)(nil), "grpc.testing.SearchResponse")
+	proto.RegisterType((*SearchResponse_Result)(nil), "grpc.testing.SearchResponse.Result")
+	proto.RegisterType((*SearchRequest)(nil), "grpc.testing.SearchRequest")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for SearchService service
+
+type SearchServiceClient interface {
+	Search(ctx context.Context, in *SearchRequest, opts ...grpc.CallOption) (*SearchResponse, error)
+	StreamingSearch(ctx context.Context, opts ...grpc.CallOption) (SearchService_StreamingSearchClient, error)
+}
+
+type searchServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewSearchServiceClient(cc *grpc.ClientConn) SearchServiceClient {
+	return &searchServiceClient{cc}
+}
+
+func (c *searchServiceClient) Search(ctx context.Context, in *SearchRequest, opts ...grpc.CallOption) (*SearchResponse, error) {
+	out := new(SearchResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.SearchService/Search", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *searchServiceClient) StreamingSearch(ctx context.Context, opts ...grpc.CallOption) (SearchService_StreamingSearchClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_SearchService_serviceDesc.Streams[0], c.cc, "/grpc.testing.SearchService/StreamingSearch", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &searchServiceStreamingSearchClient{stream}
+	return x, nil
+}
+
+type SearchService_StreamingSearchClient interface {
+	Send(*SearchRequest) error
+	Recv() (*SearchResponse, error)
+	grpc.ClientStream
+}
+
+type searchServiceStreamingSearchClient struct {
+	grpc.ClientStream
+}
+
+func (x *searchServiceStreamingSearchClient) Send(m *SearchRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *searchServiceStreamingSearchClient) Recv() (*SearchResponse, error) {
+	m := new(SearchResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for SearchService service
+
+type SearchServiceServer interface {
+	Search(context.Context, *SearchRequest) (*SearchResponse, error)
+	StreamingSearch(SearchService_StreamingSearchServer) error
+}
+
+func RegisterSearchServiceServer(s *grpc.Server, srv SearchServiceServer) {
+	s.RegisterService(&_SearchService_serviceDesc, srv)
+}
+
+func _SearchService_Search_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SearchRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SearchServiceServer).Search(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.SearchService/Search",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SearchServiceServer).Search(ctx, req.(*SearchRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SearchService_StreamingSearch_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(SearchServiceServer).StreamingSearch(&searchServiceStreamingSearchServer{stream})
+}
+
+type SearchService_StreamingSearchServer interface {
+	Send(*SearchResponse) error
+	Recv() (*SearchRequest, error)
+	grpc.ServerStream
+}
+
+type searchServiceStreamingSearchServer struct {
+	grpc.ServerStream
+}
+
+func (x *searchServiceStreamingSearchServer) Send(m *SearchResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *searchServiceStreamingSearchServer) Recv() (*SearchRequest, error) {
+	m := new(SearchRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _SearchService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.SearchService",
+	HandlerType: (*SearchServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Search",
+			Handler:    _SearchService_Search_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingSearch",
+			Handler:       _SearchService_StreamingSearch_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+func init() { proto.RegisterFile("test.proto", fileDescriptor3) }
+
+var fileDescriptor3 = []byte{
+	// 231 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xa4, 0x91, 0xbd, 0x4a, 0xc5, 0x40,
+	0x10, 0x85, 0x59, 0x83, 0xd1, 0x3b, 0xfe, 0x32, 0x58, 0x84, 0x68, 0x11, 0xae, 0x08, 0xa9, 0x16,
+	0xb9, 0xd6, 0x56, 0xb6, 0x16, 0xb2, 0x79, 0x82, 0x6b, 0x18, 0xe2, 0x42, 0x4c, 0x36, 0x33, 0x13,
+	0xc1, 0x87, 0xb1, 0xf5, 0x39, 0x25, 0x59, 0x23, 0x0a, 0x62, 0x63, 0xb7, 0xe7, 0xe3, 0xcc, 0xb7,
+	0xbb, 0x0c, 0x80, 0x92, 0xa8, 0x0d, 0xdc, 0x6b, 0x8f, 0x87, 0x0d, 0x87, 0xda, 0x4e, 0xc0, 0x77,
+	0xcd, 0xfa, 0xcd, 0xc0, 0x71, 0x45, 0x5b, 0xae, 0x9f, 0x1c, 0x49, 0xe8, 0x3b, 0x21, 0xbc, 0x85,
+	0x3d, 0x26, 0x19, 0x5b, 0x95, 0xcc, 0x14, 0x49, 0x79, 0xb0, 0xb9, 0xb4, 0xdf, 0x47, 0xec, 0xcf,
+	0xba, 0x75, 0x73, 0xd7, 0x2d, 0x33, 0xf9, 0x3d, 0xa4, 0x11, 0xe1, 0x29, 0x24, 0x23, 0xb7, 0x99,
+	0x29, 0x4c, 0xb9, 0x72, 0xd3, 0x11, 0xcf, 0x60, 0x57, 0xbd, 0xb6, 0x94, 0xed, 0xcc, 0x2c, 0x06,
+	0xcc, 0x61, 0x5f, 0x3a, 0x1f, 0x02, 0xa9, 0x64, 0x49, 0x91, 0x94, 0x2b, 0xf7, 0x95, 0xd7, 0x57,
+	0x70, 0xb4, 0xdc, 0x37, 0x8c, 0x24, 0x3a, 0x29, 0x86, 0x91, 0xf8, 0xf5, 0x53, 0x1b, 0xc3, 0xe6,
+	0xdd, 0x2c, 0xbd, 0x8a, 0xf8, 0xc5, 0xd7, 0x84, 0x77, 0x90, 0x46, 0x80, 0xe7, 0xbf, 0x3f, 0x7f,
+	0xd6, 0xe5, 0x17, 0x7f, 0xfd, 0x0d, 0x1f, 0xe0, 0xa4, 0x52, 0xa6, 0xed, 0xb3, 0xef, 0x9a, 0x7f,
+	0xdb, 0x4a, 0x73, 0x6d, 0x1e, 0xd3, 0x79, 0x09, 0x37, 0x1f, 0x01, 0x00, 0x00, 0xff, 0xff, 0x20,
+	0xd6, 0x09, 0xb8, 0x92, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_testing/test.proto b/vendor/google.golang.org/grpc/reflection/grpc_testing/test.proto
new file mode 100644
index 00000000000..d74d0fc1336
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_testing/test.proto
@@ -0,0 +1,21 @@
+syntax = "proto3";
+
+package grpc.testing;
+
+message SearchResponse {
+  message Result {
+    string url = 1;
+    string title = 2;
+    repeated string snippets = 3;
+  }
+  repeated Result results = 1;
+}
+
+message SearchRequest {
+  string query = 1;
+}
+
+service SearchService {
+  rpc Search(SearchRequest) returns (SearchResponse);
+  rpc StreamingSearch(stream SearchRequest) returns (stream SearchResponse);
+}
diff --git a/vendor/google.golang.org/grpc/reflection/serverreflection.go b/vendor/google.golang.org/grpc/reflection/serverreflection.go
new file mode 100644
index 00000000000..f28304d1be5
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/serverreflection.go
@@ -0,0 +1,394 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+Package reflection implements server reflection service.
+
+The service implemented is defined in:
+https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+	import "google.golang.org/grpc/reflection"
+
+	s := grpc.NewServer()
+	pb.RegisterYourOwnServer(s, &server{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+
+	s.Serve(lis)
+
+*/
+package reflection // import "google.golang.org/grpc/reflection"
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"reflect"
+	"strings"
+
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
+)
+
+type serverReflectionServer struct {
+	s *grpc.Server
+	// TODO add more cache if necessary
+	serviceInfo map[string]grpc.ServiceInfo // cache for s.GetServiceInfo()
+}
+
+// Register registers the server reflection service on the given gRPC server.
+func Register(s *grpc.Server) {
+	rpb.RegisterServerReflectionServer(s, &serverReflectionServer{
+		s: s,
+	})
+}
+
+// protoMessage is used for type assertion on proto messages.
+// Generated proto message implements function Descriptor(), but Descriptor()
+// is not part of interface proto.Message. This interface is needed to
+// call Descriptor().
+type protoMessage interface {
+	Descriptor() ([]byte, []int)
+}
+
+// fileDescForType gets the file descriptor for the given type.
+// The given type should be a proto message.
+func (s *serverReflectionServer) fileDescForType(st reflect.Type) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(protoMessage)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+	enc, _ := m.Descriptor()
+
+	return s.decodeFileDesc(enc)
+}
+
+// decodeFileDesc does decompression and unmarshalling on the given
+// file descriptor byte slice.
+func (s *serverReflectionServer) decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
+	raw, err := decompress(enc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decompress enc: %v", err)
+	}
+
+	fd := new(dpb.FileDescriptorProto)
+	if err := proto.Unmarshal(raw, fd); err != nil {
+		return nil, fmt.Errorf("bad descriptor: %v", err)
+	}
+	return fd, nil
+}
+
+// decompress does gzip decompression.
+func decompress(b []byte) ([]byte, error) {
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	out, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	return out, nil
+}
+
+func (s *serverReflectionServer) typeForName(name string) (reflect.Type, error) {
+	pt := proto.MessageType(name)
+	if pt == nil {
+		return nil, fmt.Errorf("unknown type: %q", name)
+	}
+	st := pt.Elem()
+
+	return st, nil
+}
+
+func (s *serverReflectionServer) fileDescContainingExtension(st reflect.Type, ext int32) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	var extDesc *proto.ExtensionDesc
+	for id, desc := range proto.RegisteredExtensions(m) {
+		if id == ext {
+			extDesc = desc
+			break
+		}
+	}
+
+	if extDesc == nil {
+		return nil, fmt.Errorf("failed to find registered extension for extension number %v", ext)
+	}
+
+	return s.decodeFileDesc(proto.FileDescriptor(extDesc.Filename))
+}
+
+func (s *serverReflectionServer) allExtensionNumbersForType(st reflect.Type) ([]int32, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	exts := proto.RegisteredExtensions(m)
+	out := make([]int32, 0, len(exts))
+	for id := range exts {
+		out = append(out, id)
+	}
+	return out, nil
+}
+
+// fileDescEncodingByFilename finds the file descriptor for given filename,
+// does marshalling on it and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingByFilename(name string) ([]byte, error) {
+	enc := proto.FileDescriptor(name)
+	if enc == nil {
+		return nil, fmt.Errorf("unknown file: %v", name)
+	}
+	fd, err := s.decodeFileDesc(enc)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(fd)
+}
+
+// serviceMetadataForSymbol finds the metadata for name in s.serviceInfo.
+// name should be a service name or a method name.
+func (s *serverReflectionServer) serviceMetadataForSymbol(name string) (interface{}, error) {
+	if s.serviceInfo == nil {
+		s.serviceInfo = s.s.GetServiceInfo()
+	}
+
+	// Check if it's a service name.
+	if info, ok := s.serviceInfo[name]; ok {
+		return info.Metadata, nil
+	}
+
+	// Check if it's a method name.
+	pos := strings.LastIndex(name, ".")
+	// Not a valid method name.
+	if pos == -1 {
+		return nil, fmt.Errorf("unknown symbol: %v", name)
+	}
+
+	info, ok := s.serviceInfo[name[:pos]]
+	// Substring before last "." is not a service name.
+	if !ok {
+		return nil, fmt.Errorf("unknown symbol: %v", name)
+	}
+
+	// Search the method name in info.Methods.
+	var found bool
+	for _, m := range info.Methods {
+		if m.Name == name[pos+1:] {
+			found = true
+			break
+		}
+	}
+	if found {
+		return info.Metadata, nil
+	}
+
+	return nil, fmt.Errorf("unknown symbol: %v", name)
+}
+
+// fileDescEncodingContainingSymbol finds the file descriptor containing the given symbol,
+// does marshalling on it and returns the marshalled result.
+// The given symbol can be a type, a service or a method.
+func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string) ([]byte, error) {
+	var (
+		fd *dpb.FileDescriptorProto
+	)
+	// Check if it's a type name.
+	if st, err := s.typeForName(name); err == nil {
+		fd, err = s.fileDescForType(st)
+		if err != nil {
+			return nil, err
+		}
+	} else { // Check if it's a service name or a method name.
+		meta, err := s.serviceMetadataForSymbol(name)
+
+		// Metadata not found.
+		if err != nil {
+			return nil, err
+		}
+
+		// Metadata not valid.
+		fileNameForMeta, ok := meta.(string)
+		if !ok {
+			return nil, fmt.Errorf("invalid file descriptor for symbol: %v", name)
+		}
+
+		enc := proto.FileDescriptor(fileNameForMeta)
+		fd, err = s.decodeFileDesc(enc)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return proto.Marshal(fd)
+}
+
+// fileDescEncodingContainingExtension finds the file descriptor containing given extension,
+// does marshalling on it and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingContainingExtension(typeName string, extNum int32) ([]byte, error) {
+	st, err := s.typeForName(typeName)
+	if err != nil {
+		return nil, err
+	}
+	fd, err := s.fileDescContainingExtension(st, extNum)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(fd)
+}
+
+// allExtensionNumbersForTypeName returns all extension numbers for the given type.
+func (s *serverReflectionServer) allExtensionNumbersForTypeName(name string) ([]int32, error) {
+	st, err := s.typeForName(name)
+	if err != nil {
+		return nil, err
+	}
+	extNums, err := s.allExtensionNumbersForType(st)
+	if err != nil {
+		return nil, err
+	}
+	return extNums, nil
+}
+
+// ServerReflectionInfo is the reflection service handler.
+func (s *serverReflectionServer) ServerReflectionInfo(stream rpb.ServerReflection_ServerReflectionInfoServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		out := &rpb.ServerReflectionResponse{
+			ValidHost:       in.Host,
+			OriginalRequest: in,
+		}
+		switch req := in.MessageRequest.(type) {
+		case *rpb.ServerReflectionRequest_FileByFilename:
+			b, err := s.fileDescEncodingByFilename(req.FileByFilename)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingSymbol:
+			b, err := s.fileDescEncodingContainingSymbol(req.FileContainingSymbol)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingExtension:
+			typeName := req.FileContainingExtension.ContainingType
+			extNum := req.FileContainingExtension.ExtensionNumber
+			b, err := s.fileDescEncodingContainingExtension(typeName, extNum)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_AllExtensionNumbersOfType:
+			extNums, err := s.allExtensionNumbersForTypeName(req.AllExtensionNumbersOfType)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_AllExtensionNumbersResponse{
+					AllExtensionNumbersResponse: &rpb.ExtensionNumberResponse{
+						BaseTypeName:    req.AllExtensionNumbersOfType,
+						ExtensionNumber: extNums,
+					},
+				}
+			}
+		case *rpb.ServerReflectionRequest_ListServices:
+			if s.serviceInfo == nil {
+				s.serviceInfo = s.s.GetServiceInfo()
+			}
+			serviceResponses := make([]*rpb.ServiceResponse, 0, len(s.serviceInfo))
+			for n := range s.serviceInfo {
+				serviceResponses = append(serviceResponses, &rpb.ServiceResponse{
+					Name: n,
+				})
+			}
+			out.MessageResponse = &rpb.ServerReflectionResponse_ListServicesResponse{
+				ListServicesResponse: &rpb.ListServiceResponse{
+					Service: serviceResponses,
+				},
+			}
+		default:
+			return grpc.Errorf(codes.InvalidArgument, "invalid MessageRequest: %v", in.MessageRequest)
+		}
+
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}
diff --git a/vendor/google.golang.org/grpc/reflection/serverreflection_test.go b/vendor/google.golang.org/grpc/reflection/serverreflection_test.go
new file mode 100644
index 00000000000..daef8ff69e6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/serverreflection_test.go
@@ -0,0 +1,506 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package reflection
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"sort"
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
+	pb "google.golang.org/grpc/reflection/grpc_testing"
+)
+
+var (
+	s = &serverReflectionServer{}
+	// fileDescriptor of each test proto file.
+	fdTest       *dpb.FileDescriptorProto
+	fdProto2     *dpb.FileDescriptorProto
+	fdProto2Ext  *dpb.FileDescriptorProto
+	fdProto2Ext2 *dpb.FileDescriptorProto
+	// fileDescriptor marshalled.
+	fdTestByte       []byte
+	fdProto2Byte     []byte
+	fdProto2ExtByte  []byte
+	fdProto2Ext2Byte []byte
+)
+
+func loadFileDesc(filename string) (*dpb.FileDescriptorProto, []byte) {
+	enc := proto.FileDescriptor(filename)
+	if enc == nil {
+		panic(fmt.Sprintf("failed to find fd for file: %v", filename))
+	}
+	fd, err := s.decodeFileDesc(enc)
+	if err != nil {
+		panic(fmt.Sprintf("failed to decode enc: %v", err))
+	}
+	b, err := proto.Marshal(fd)
+	if err != nil {
+		panic(fmt.Sprintf("failed to marshal fd: %v", err))
+	}
+	return fd, b
+}
+
+func init() {
+	fdTest, fdTestByte = loadFileDesc("test.proto")
+	fdProto2, fdProto2Byte = loadFileDesc("proto2.proto")
+	fdProto2Ext, fdProto2ExtByte = loadFileDesc("proto2_ext.proto")
+	fdProto2Ext2, fdProto2Ext2Byte = loadFileDesc("proto2_ext2.proto")
+}
+
+func TestFileDescForType(t *testing.T) {
+	for _, test := range []struct {
+		st     reflect.Type
+		wantFd *dpb.FileDescriptorProto
+	}{
+		{reflect.TypeOf(pb.SearchResponse_Result{}), fdTest},
+		{reflect.TypeOf(pb.ToBeExtended{}), fdProto2},
+	} {
+		fd, err := s.fileDescForType(test.st)
+		if err != nil || !reflect.DeepEqual(fd, test.wantFd) {
+			t.Errorf("fileDescForType(%q) = %q, %v, want %q, <nil>", test.st, fd, err, test.wantFd)
+		}
+	}
+}
+
+func TestTypeForName(t *testing.T) {
+	for _, test := range []struct {
+		name string
+		want reflect.Type
+	}{
+		{"grpc.testing.SearchResponse", reflect.TypeOf(pb.SearchResponse{})},
+	} {
+		r, err := s.typeForName(test.name)
+		if err != nil || r != test.want {
+			t.Errorf("typeForName(%q) = %q, %v, want %q, <nil>", test.name, r, err, test.want)
+		}
+	}
+}
+
+func TestTypeForNameNotFound(t *testing.T) {
+	for _, test := range []string{
+		"grpc.testing.not_exiting",
+	} {
+		_, err := s.typeForName(test)
+		if err == nil {
+			t.Errorf("typeForName(%q) = _, %v, want _, <non-nil>", test, err)
+		}
+	}
+}
+
+func TestFileDescContainingExtension(t *testing.T) {
+	for _, test := range []struct {
+		st     reflect.Type
+		extNum int32
+		want   *dpb.FileDescriptorProto
+	}{
+		{reflect.TypeOf(pb.ToBeExtended{}), 13, fdProto2Ext},
+		{reflect.TypeOf(pb.ToBeExtended{}), 17, fdProto2Ext},
+		{reflect.TypeOf(pb.ToBeExtended{}), 19, fdProto2Ext},
+		{reflect.TypeOf(pb.ToBeExtended{}), 23, fdProto2Ext2},
+		{reflect.TypeOf(pb.ToBeExtended{}), 29, fdProto2Ext2},
+	} {
+		fd, err := s.fileDescContainingExtension(test.st, test.extNum)
+		if err != nil || !reflect.DeepEqual(fd, test.want) {
+			t.Errorf("fileDescContainingExtension(%q) = %q, %v, want %q, <nil>", test.st, fd, err, test.want)
+		}
+	}
+}
+
+// intArray is used to sort []int32
+type intArray []int32
+
+func (s intArray) Len() int           { return len(s) }
+func (s intArray) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s intArray) Less(i, j int) bool { return s[i] < s[j] }
+
+func TestAllExtensionNumbersForType(t *testing.T) {
+	for _, test := range []struct {
+		st   reflect.Type
+		want []int32
+	}{
+		{reflect.TypeOf(pb.ToBeExtended{}), []int32{13, 17, 19, 23, 29}},
+	} {
+		r, err := s.allExtensionNumbersForType(test.st)
+		sort.Sort(intArray(r))
+		if err != nil || !reflect.DeepEqual(r, test.want) {
+			t.Errorf("allExtensionNumbersForType(%q) = %v, %v, want %v, <nil>", test.st, r, err, test.want)
+		}
+	}
+}
+
+// Do end2end tests.
+
+type server struct{}
+
+func (s *server) Search(ctx context.Context, in *pb.SearchRequest) (*pb.SearchResponse, error) {
+	return &pb.SearchResponse{}, nil
+}
+
+func (s *server) StreamingSearch(stream pb.SearchService_StreamingSearchServer) error {
+	return nil
+}
+
+func TestReflectionEnd2end(t *testing.T) {
+	// Start server.
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	pb.RegisterSearchServiceServer(s, &server{})
+	// Register reflection service on s.
+	Register(s)
+	go s.Serve(lis)
+
+	// Create client.
+	conn, err := grpc.Dial(lis.Addr().String(), grpc.WithInsecure())
+	if err != nil {
+		t.Fatalf("cannot connect to server: %v", err)
+	}
+	defer conn.Close()
+
+	c := rpb.NewServerReflectionClient(conn)
+	stream, err := c.ServerReflectionInfo(context.Background())
+	if err != nil {
+		t.Fatalf("cannot get ServerReflectionInfo: %v", err)
+	}
+
+	testFileByFilename(t, stream)
+	testFileByFilenameError(t, stream)
+	testFileContainingSymbol(t, stream)
+	testFileContainingSymbolError(t, stream)
+	testFileContainingExtension(t, stream)
+	testFileContainingExtensionError(t, stream)
+	testAllExtensionNumbersOfType(t, stream)
+	testAllExtensionNumbersOfTypeError(t, stream)
+	testListServices(t, stream)
+
+	s.Stop()
+}
+
+func testFileByFilename(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []struct {
+		filename string
+		want     []byte
+	}{
+		{"test.proto", fdTestByte},
+		{"proto2.proto", fdProto2Byte},
+		{"proto2_ext.proto", fdProto2ExtByte},
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileByFilename{
+				FileByFilename: test.filename,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_FileDescriptorResponse:
+			if !reflect.DeepEqual(r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want) {
+				t.Errorf("FileByFilename(%v)\nreceived: %q,\nwant: %q", test.filename, r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want)
+			}
+		default:
+			t.Errorf("FileByFilename(%v) = %v, want type <ServerReflectionResponse_FileDescriptorResponse>", test.filename, r.MessageResponse)
+		}
+	}
+}
+
+func testFileByFilenameError(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []string{
+		"test.poto",
+		"proo2.proto",
+		"proto2_et.proto",
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileByFilename{
+				FileByFilename: test,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_ErrorResponse:
+		default:
+			t.Errorf("FileByFilename(%v) = %v, want type <ServerReflectionResponse_ErrorResponse>", test, r.MessageResponse)
+		}
+	}
+}
+
+func testFileContainingSymbol(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []struct {
+		symbol string
+		want   []byte
+	}{
+		{"grpc.testing.SearchService", fdTestByte},
+		{"grpc.testing.SearchService.Search", fdTestByte},
+		{"grpc.testing.SearchService.StreamingSearch", fdTestByte},
+		{"grpc.testing.SearchResponse", fdTestByte},
+		{"grpc.testing.ToBeExtended", fdProto2Byte},
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileContainingSymbol{
+				FileContainingSymbol: test.symbol,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_FileDescriptorResponse:
+			if !reflect.DeepEqual(r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want) {
+				t.Errorf("FileContainingSymbol(%v)\nreceived: %q,\nwant: %q", test.symbol, r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want)
+			}
+		default:
+			t.Errorf("FileContainingSymbol(%v) = %v, want type <ServerReflectionResponse_FileDescriptorResponse>", test.symbol, r.MessageResponse)
+		}
+	}
+}
+
+func testFileContainingSymbolError(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []string{
+		"grpc.testing.SerchService",
+		"grpc.testing.SearchService.SearchE",
+		"grpc.tesing.SearchResponse",
+		"gpc.testing.ToBeExtended",
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileContainingSymbol{
+				FileContainingSymbol: test,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_ErrorResponse:
+		default:
+			t.Errorf("FileContainingSymbol(%v) = %v, want type <ServerReflectionResponse_ErrorResponse>", test, r.MessageResponse)
+		}
+	}
+}
+
+func testFileContainingExtension(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []struct {
+		typeName string
+		extNum   int32
+		want     []byte
+	}{
+		{"grpc.testing.ToBeExtended", 13, fdProto2ExtByte},
+		{"grpc.testing.ToBeExtended", 17, fdProto2ExtByte},
+		{"grpc.testing.ToBeExtended", 19, fdProto2ExtByte},
+		{"grpc.testing.ToBeExtended", 23, fdProto2Ext2Byte},
+		{"grpc.testing.ToBeExtended", 29, fdProto2Ext2Byte},
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileContainingExtension{
+				FileContainingExtension: &rpb.ExtensionRequest{
+					ContainingType:  test.typeName,
+					ExtensionNumber: test.extNum,
+				},
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_FileDescriptorResponse:
+			if !reflect.DeepEqual(r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want) {
+				t.Errorf("FileContainingExtension(%v, %v)\nreceived: %q,\nwant: %q", test.typeName, test.extNum, r.GetFileDescriptorResponse().FileDescriptorProto[0], test.want)
+			}
+		default:
+			t.Errorf("FileContainingExtension(%v, %v) = %v, want type <ServerReflectionResponse_FileDescriptorResponse>", test.typeName, test.extNum, r.MessageResponse)
+		}
+	}
+}
+
+func testFileContainingExtensionError(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []struct {
+		typeName string
+		extNum   int32
+	}{
+		{"grpc.testing.ToBExtended", 17},
+		{"grpc.testing.ToBeExtended", 15},
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_FileContainingExtension{
+				FileContainingExtension: &rpb.ExtensionRequest{
+					ContainingType:  test.typeName,
+					ExtensionNumber: test.extNum,
+				},
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_ErrorResponse:
+		default:
+			t.Errorf("FileContainingExtension(%v, %v) = %v, want type <ServerReflectionResponse_FileDescriptorResponse>", test.typeName, test.extNum, r.MessageResponse)
+		}
+	}
+}
+
+func testAllExtensionNumbersOfType(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []struct {
+		typeName string
+		want     []int32
+	}{
+		{"grpc.testing.ToBeExtended", []int32{13, 17, 19, 23, 29}},
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_AllExtensionNumbersOfType{
+				AllExtensionNumbersOfType: test.typeName,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_AllExtensionNumbersResponse:
+			extNum := r.GetAllExtensionNumbersResponse().ExtensionNumber
+			sort.Sort(intArray(extNum))
+			if r.GetAllExtensionNumbersResponse().BaseTypeName != test.typeName ||
+				!reflect.DeepEqual(extNum, test.want) {
+				t.Errorf("AllExtensionNumbersOfType(%v)\nreceived: %v,\nwant: {%q %v}", r.GetAllExtensionNumbersResponse(), test.typeName, test.typeName, test.want)
+			}
+		default:
+			t.Errorf("AllExtensionNumbersOfType(%v) = %v, want type <ServerReflectionResponse_AllExtensionNumbersResponse>", test.typeName, r.MessageResponse)
+		}
+	}
+}
+
+func testAllExtensionNumbersOfTypeError(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	for _, test := range []string{
+		"grpc.testing.ToBeExtendedE",
+	} {
+		if err := stream.Send(&rpb.ServerReflectionRequest{
+			MessageRequest: &rpb.ServerReflectionRequest_AllExtensionNumbersOfType{
+				AllExtensionNumbersOfType: test,
+			},
+		}); err != nil {
+			t.Fatalf("failed to send request: %v", err)
+		}
+		r, err := stream.Recv()
+		if err != nil {
+			// io.EOF is not ok.
+			t.Fatalf("failed to recv response: %v", err)
+		}
+
+		switch r.MessageResponse.(type) {
+		case *rpb.ServerReflectionResponse_ErrorResponse:
+		default:
+			t.Errorf("AllExtensionNumbersOfType(%v) = %v, want type <ServerReflectionResponse_ErrorResponse>", test, r.MessageResponse)
+		}
+	}
+}
+
+func testListServices(t *testing.T, stream rpb.ServerReflection_ServerReflectionInfoClient) {
+	if err := stream.Send(&rpb.ServerReflectionRequest{
+		MessageRequest: &rpb.ServerReflectionRequest_ListServices{},
+	}); err != nil {
+		t.Fatalf("failed to send request: %v", err)
+	}
+	r, err := stream.Recv()
+	if err != nil {
+		// io.EOF is not ok.
+		t.Fatalf("failed to recv response: %v", err)
+	}
+
+	switch r.MessageResponse.(type) {
+	case *rpb.ServerReflectionResponse_ListServicesResponse:
+		services := r.GetListServicesResponse().Service
+		want := []string{"grpc.testing.SearchService", "grpc.reflection.v1alpha.ServerReflection"}
+		// Compare service names in response with want.
+		if len(services) != len(want) {
+			t.Errorf("= %v, want service names: %v", services, want)
+		}
+		m := make(map[string]int)
+		for _, e := range services {
+			m[e.Name]++
+		}
+		for _, e := range want {
+			if m[e] > 0 {
+				m[e]--
+				continue
+			}
+			t.Errorf("ListService\nreceived: %v,\nwant: %q", services, want)
+		}
+	default:
+		t.Errorf("ListServices = %v, want type <ServerReflectionResponse_ListServicesResponse>", r.MessageResponse)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/rpc_util.go b/vendor/google.golang.org/grpc/rpc_util.go
new file mode 100644
index 00000000000..bd21c4c04df
--- /dev/null
+++ b/vendor/google.golang.org/grpc/rpc_util.go
@@ -0,0 +1,532 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"compress/gzip"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math"
+	"os"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/transport"
+)
+
+// Codec defines the interface gRPC uses to encode and decode messages.
+type Codec interface {
+	// Marshal returns the wire format of v.
+	Marshal(v interface{}) ([]byte, error)
+	// Unmarshal parses the wire format into v.
+	Unmarshal(data []byte, v interface{}) error
+	// String returns the name of the Codec implementation. The returned
+	// string will be used as part of content type in transmission.
+	String() string
+}
+
+// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
+type protoCodec struct{}
+
+func (protoCodec) Marshal(v interface{}) ([]byte, error) {
+	return proto.Marshal(v.(proto.Message))
+}
+
+func (protoCodec) Unmarshal(data []byte, v interface{}) error {
+	return proto.Unmarshal(data, v.(proto.Message))
+}
+
+func (protoCodec) String() string {
+	return "proto"
+}
+
+// Compressor defines the interface gRPC uses to compress a message.
+type Compressor interface {
+	// Do compresses p into w.
+	Do(w io.Writer, p []byte) error
+	// Type returns the compression algorithm the Compressor uses.
+	Type() string
+}
+
+// NewGZIPCompressor creates a Compressor based on GZIP.
+func NewGZIPCompressor() Compressor {
+	return &gzipCompressor{}
+}
+
+type gzipCompressor struct {
+}
+
+func (c *gzipCompressor) Do(w io.Writer, p []byte) error {
+	z := gzip.NewWriter(w)
+	if _, err := z.Write(p); err != nil {
+		return err
+	}
+	return z.Close()
+}
+
+func (c *gzipCompressor) Type() string {
+	return "gzip"
+}
+
+// Decompressor defines the interface gRPC uses to decompress a message.
+type Decompressor interface {
+	// Do reads the data from r and uncompress them.
+	Do(r io.Reader) ([]byte, error)
+	// Type returns the compression algorithm the Decompressor uses.
+	Type() string
+}
+
+type gzipDecompressor struct {
+}
+
+// NewGZIPDecompressor creates a Decompressor based on GZIP.
+func NewGZIPDecompressor() Decompressor {
+	return &gzipDecompressor{}
+}
+
+func (d *gzipDecompressor) Do(r io.Reader) ([]byte, error) {
+	z, err := gzip.NewReader(r)
+	if err != nil {
+		return nil, err
+	}
+	defer z.Close()
+	return ioutil.ReadAll(z)
+}
+
+func (d *gzipDecompressor) Type() string {
+	return "gzip"
+}
+
+// callInfo contains all related configuration and information about an RPC.
+type callInfo struct {
+	failFast  bool
+	headerMD  metadata.MD
+	trailerMD metadata.MD
+	peer      *peer.Peer
+	traceInfo traceInfo // in trace.go
+}
+
+var defaultCallInfo = callInfo{failFast: true}
+
+// CallOption configures a Call before it starts or extracts information from
+// a Call after it completes.
+type CallOption interface {
+	// before is called before the call is sent to any server.  If before
+	// returns a non-nil error, the RPC fails with that error.
+	before(*callInfo) error
+
+	// after is called after the call has completed.  after cannot return an
+	// error, so any failures should be reported via output parameters.
+	after(*callInfo)
+}
+
+type beforeCall func(c *callInfo) error
+
+func (o beforeCall) before(c *callInfo) error { return o(c) }
+func (o beforeCall) after(c *callInfo)        {}
+
+type afterCall func(c *callInfo)
+
+func (o afterCall) before(c *callInfo) error { return nil }
+func (o afterCall) after(c *callInfo)        { o(c) }
+
+// Header returns a CallOptions that retrieves the header metadata
+// for a unary RPC.
+func Header(md *metadata.MD) CallOption {
+	return afterCall(func(c *callInfo) {
+		*md = c.headerMD
+	})
+}
+
+// Trailer returns a CallOptions that retrieves the trailer metadata
+// for a unary RPC.
+func Trailer(md *metadata.MD) CallOption {
+	return afterCall(func(c *callInfo) {
+		*md = c.trailerMD
+	})
+}
+
+// Peer returns a CallOption that retrieves peer information for a
+// unary RPC.
+func Peer(peer *peer.Peer) CallOption {
+	return afterCall(func(c *callInfo) {
+		*peer = *c.peer
+	})
+}
+
+// FailFast configures the action to take when an RPC is attempted on broken
+// connections or unreachable servers. If failfast is true, the RPC will fail
+// immediately. Otherwise, the RPC client will block the call until a
+// connection is available (or the call is canceled or times out) and will retry
+// the call if it fails due to a transient error. Please refer to
+// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md. Note: failFast is default to true.
+func FailFast(failFast bool) CallOption {
+	return beforeCall(func(c *callInfo) error {
+		c.failFast = failFast
+		return nil
+	})
+}
+
+// The format of the payload: compressed or not?
+type payloadFormat uint8
+
+const (
+	compressionNone payloadFormat = iota // no compression
+	compressionMade
+)
+
+// parser reads complete gRPC messages from the underlying reader.
+type parser struct {
+	// r is the underlying reader.
+	// See the comment on recvMsg for the permissible
+	// error types.
+	r io.Reader
+
+	// The header of a gRPC message. Find more detail
+	// at http://www.grpc.io/docs/guides/wire.html.
+	header [5]byte
+}
+
+// recvMsg reads a complete gRPC message from the stream.
+//
+// It returns the message and its payload (compression/encoding)
+// format. The caller owns the returned msg memory.
+//
+// If there is an error, possible values are:
+//   * io.EOF, when no messages remain
+//   * io.ErrUnexpectedEOF
+//   * of type transport.ConnectionError
+//   * of type transport.StreamError
+// No other error values or types must be returned, which also means
+// that the underlying io.Reader must not return an incompatible
+// error.
+func (p *parser) recvMsg(maxMsgSize int) (pf payloadFormat, msg []byte, err error) {
+	if _, err := io.ReadFull(p.r, p.header[:]); err != nil {
+		return 0, nil, err
+	}
+
+	pf = payloadFormat(p.header[0])
+	length := binary.BigEndian.Uint32(p.header[1:])
+
+	if length == 0 {
+		return pf, nil, nil
+	}
+	if length > uint32(maxMsgSize) {
+		return 0, nil, Errorf(codes.Internal, "grpc: received message length %d exceeding the max size %d", length, maxMsgSize)
+	}
+	// TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead
+	// of making it for each message:
+	msg = make([]byte, int(length))
+	if _, err := io.ReadFull(p.r, msg); err != nil {
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+		return 0, nil, err
+	}
+	return pf, msg, nil
+}
+
+// encode serializes msg and prepends the message header. If msg is nil, it
+// generates the message header of 0 message length.
+func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, error) {
+	var (
+		b      []byte
+		length uint
+	)
+	if msg != nil {
+		var err error
+		// TODO(zhaoq): optimize to reduce memory alloc and copying.
+		b, err = c.Marshal(msg)
+		if err != nil {
+			return nil, err
+		}
+		if outPayload != nil {
+			outPayload.Payload = msg
+			// TODO truncate large payload.
+			outPayload.Data = b
+			outPayload.Length = len(b)
+		}
+		if cp != nil {
+			if err := cp.Do(cbuf, b); err != nil {
+				return nil, err
+			}
+			b = cbuf.Bytes()
+		}
+		length = uint(len(b))
+	}
+	if length > math.MaxUint32 {
+		return nil, Errorf(codes.InvalidArgument, "grpc: message too large (%d bytes)", length)
+	}
+
+	const (
+		payloadLen = 1
+		sizeLen    = 4
+	)
+
+	var buf = make([]byte, payloadLen+sizeLen+len(b))
+
+	// Write payload format
+	if cp == nil {
+		buf[0] = byte(compressionNone)
+	} else {
+		buf[0] = byte(compressionMade)
+	}
+	// Write length of b into buf
+	binary.BigEndian.PutUint32(buf[1:], uint32(length))
+	// Copy encoded msg to buf
+	copy(buf[5:], b)
+
+	if outPayload != nil {
+		outPayload.WireLength = len(buf)
+	}
+
+	return buf, nil
+}
+
+func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error {
+	switch pf {
+	case compressionNone:
+	case compressionMade:
+		if dc == nil || recvCompress != dc.Type() {
+			return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
+		}
+	default:
+		return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf)
+	}
+	return nil
+}
+
+func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{}, maxMsgSize int, inPayload *stats.InPayload) error {
+	pf, d, err := p.recvMsg(maxMsgSize)
+	if err != nil {
+		return err
+	}
+	if inPayload != nil {
+		inPayload.WireLength = len(d)
+	}
+	if err := checkRecvPayload(pf, s.RecvCompress(), dc); err != nil {
+		return err
+	}
+	if pf == compressionMade {
+		d, err = dc.Do(bytes.NewReader(d))
+		if err != nil {
+			return Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
+		}
+	}
+	if len(d) > maxMsgSize {
+		// TODO: Revisit the error code. Currently keep it consistent with java
+		// implementation.
+		return Errorf(codes.Internal, "grpc: received a message of %d bytes exceeding %d limit", len(d), maxMsgSize)
+	}
+	if err := c.Unmarshal(d, m); err != nil {
+		return Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
+	}
+	if inPayload != nil {
+		inPayload.RecvTime = time.Now()
+		inPayload.Payload = m
+		// TODO truncate large payload.
+		inPayload.Data = d
+		inPayload.Length = len(d)
+	}
+	return nil
+}
+
+// rpcError defines the status from an RPC.
+type rpcError struct {
+	code codes.Code
+	desc string
+}
+
+func (e *rpcError) Error() string {
+	return fmt.Sprintf("rpc error: code = %s desc = %s", e.code, e.desc)
+}
+
+// Code returns the error code for err if it was produced by the rpc system.
+// Otherwise, it returns codes.Unknown.
+func Code(err error) codes.Code {
+	if err == nil {
+		return codes.OK
+	}
+	if e, ok := err.(*rpcError); ok {
+		return e.code
+	}
+	return codes.Unknown
+}
+
+// ErrorDesc returns the error description of err if it was produced by the rpc system.
+// Otherwise, it returns err.Error() or empty string when err is nil.
+func ErrorDesc(err error) string {
+	if err == nil {
+		return ""
+	}
+	if e, ok := err.(*rpcError); ok {
+		return e.desc
+	}
+	return err.Error()
+}
+
+// Errorf returns an error containing an error code and a description;
+// Errorf returns nil if c is OK.
+func Errorf(c codes.Code, format string, a ...interface{}) error {
+	if c == codes.OK {
+		return nil
+	}
+	return &rpcError{
+		code: c,
+		desc: fmt.Sprintf(format, a...),
+	}
+}
+
+// toRPCErr converts an error into a rpcError.
+func toRPCErr(err error) error {
+	switch e := err.(type) {
+	case *rpcError:
+		return err
+	case transport.StreamError:
+		return &rpcError{
+			code: e.Code,
+			desc: e.Desc,
+		}
+	case transport.ConnectionError:
+		return &rpcError{
+			code: codes.Internal,
+			desc: e.Desc,
+		}
+	default:
+		switch err {
+		case context.DeadlineExceeded:
+			return &rpcError{
+				code: codes.DeadlineExceeded,
+				desc: err.Error(),
+			}
+		case context.Canceled:
+			return &rpcError{
+				code: codes.Canceled,
+				desc: err.Error(),
+			}
+		case ErrClientConnClosing:
+			return &rpcError{
+				code: codes.FailedPrecondition,
+				desc: err.Error(),
+			}
+		}
+
+	}
+	return Errorf(codes.Unknown, "%v", err)
+}
+
+// convertCode converts a standard Go error into its canonical code. Note that
+// this is only used to translate the error returned by the server applications.
+func convertCode(err error) codes.Code {
+	switch err {
+	case nil:
+		return codes.OK
+	case io.EOF:
+		return codes.OutOfRange
+	case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
+		return codes.FailedPrecondition
+	case os.ErrInvalid:
+		return codes.InvalidArgument
+	case context.Canceled:
+		return codes.Canceled
+	case context.DeadlineExceeded:
+		return codes.DeadlineExceeded
+	}
+	switch {
+	case os.IsExist(err):
+		return codes.AlreadyExists
+	case os.IsNotExist(err):
+		return codes.NotFound
+	case os.IsPermission(err):
+		return codes.PermissionDenied
+	}
+	return codes.Unknown
+}
+
+// MethodConfig defines the configuration recommended by the service providers for a
+// particular method.
+// This is EXPERIMENTAL and subject to change.
+type MethodConfig struct {
+	// WaitForReady indicates whether RPCs sent to this method should wait until
+	// the connection is ready by default (!failfast). The value specified via the
+	// gRPC client API will override the value set here.
+	WaitForReady bool
+	// Timeout is the default timeout for RPCs sent to this method. The actual
+	// deadline used will be the minimum of the value specified here and the value
+	// set by the application via the gRPC client API.  If either one is not set,
+	// then the other will be used.  If neither is set, then the RPC has no deadline.
+	Timeout time.Duration
+	// MaxReqSize is the maximum allowed payload size for an individual request in a
+	// stream (client->server) in bytes. The size which is measured is the serialized
+	// payload after per-message compression (but before stream compression) in bytes.
+	// The actual value used is the minumum of the value specified here and the value set
+	// by the application via the gRPC client API. If either one is not set, then the other
+	// will be used.  If neither is set, then the built-in default is used.
+	// TODO: support this.
+	MaxReqSize uint32
+	// MaxRespSize is the maximum allowed payload size for an individual response in a
+	// stream (server->client) in bytes.
+	// TODO: support this.
+	MaxRespSize uint32
+}
+
+// ServiceConfig is provided by the service provider and contains parameters for how
+// clients that connect to the service should behave.
+// This is EXPERIMENTAL and subject to change.
+type ServiceConfig struct {
+	// LB is the load balancer the service providers recommends. The balancer specified
+	// via grpc.WithBalancer will override this.
+	LB Balancer
+	// Methods contains a map for the methods in this service.
+	Methods map[string]MethodConfig
+}
+
+// SupportPackageIsVersion4 is referenced from generated protocol buffer files
+// to assert that that code is compatible with this version of the grpc package.
+//
+// This constant may be renamed in the future if a change in the generated code
+// requires a synchronised update of grpc-go and protoc-gen-go. This constant
+// should not be referenced from any other code.
+const SupportPackageIsVersion4 = true
+
+// Version is the current grpc version.
+const Version = "1.3.0-dev"
diff --git a/vendor/google.golang.org/grpc/rpc_util_test.go b/vendor/google.golang.org/grpc/rpc_util_test.go
new file mode 100644
index 00000000000..375e42bc7ae
--- /dev/null
+++ b/vendor/google.golang.org/grpc/rpc_util_test.go
@@ -0,0 +1,234 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"io"
+	"math"
+	"reflect"
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	perfpb "google.golang.org/grpc/test/codec_perf"
+	"google.golang.org/grpc/transport"
+)
+
+func TestSimpleParsing(t *testing.T) {
+	bigMsg := bytes.Repeat([]byte{'x'}, 1<<24)
+	for _, test := range []struct {
+		// input
+		p []byte
+		// outputs
+		err error
+		b   []byte
+		pt  payloadFormat
+	}{
+		{nil, io.EOF, nil, compressionNone},
+		{[]byte{0, 0, 0, 0, 0}, nil, nil, compressionNone},
+		{[]byte{0, 0, 0, 0, 1, 'a'}, nil, []byte{'a'}, compressionNone},
+		{[]byte{1, 0}, io.ErrUnexpectedEOF, nil, compressionNone},
+		{[]byte{0, 0, 0, 0, 10, 'a'}, io.ErrUnexpectedEOF, nil, compressionNone},
+		// Check that messages with length >= 2^24 are parsed.
+		{append([]byte{0, 1, 0, 0, 0}, bigMsg...), nil, bigMsg, compressionNone},
+	} {
+		buf := bytes.NewReader(test.p)
+		parser := &parser{r: buf}
+		pt, b, err := parser.recvMsg(math.MaxInt32)
+		if err != test.err || !bytes.Equal(b, test.b) || pt != test.pt {
+			t.Fatalf("parser{%v}.recvMsg(_) = %v, %v, %v\nwant %v, %v, %v", test.p, pt, b, err, test.pt, test.b, test.err)
+		}
+	}
+}
+
+func TestMultipleParsing(t *testing.T) {
+	// Set a byte stream consists of 3 messages with their headers.
+	p := []byte{0, 0, 0, 0, 1, 'a', 0, 0, 0, 0, 2, 'b', 'c', 0, 0, 0, 0, 1, 'd'}
+	b := bytes.NewReader(p)
+	parser := &parser{r: b}
+
+	wantRecvs := []struct {
+		pt   payloadFormat
+		data []byte
+	}{
+		{compressionNone, []byte("a")},
+		{compressionNone, []byte("bc")},
+		{compressionNone, []byte("d")},
+	}
+	for i, want := range wantRecvs {
+		pt, data, err := parser.recvMsg(math.MaxInt32)
+		if err != nil || pt != want.pt || !reflect.DeepEqual(data, want.data) {
+			t.Fatalf("after %d calls, parser{%v}.recvMsg(_) = %v, %v, %v\nwant %v, %v, <nil>",
+				i, p, pt, data, err, want.pt, want.data)
+		}
+	}
+
+	pt, data, err := parser.recvMsg(math.MaxInt32)
+	if err != io.EOF {
+		t.Fatalf("after %d recvMsgs calls, parser{%v}.recvMsg(_) = %v, %v, %v\nwant _, _, %v",
+			len(wantRecvs), p, pt, data, err, io.EOF)
+	}
+}
+
+func TestEncode(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		msg proto.Message
+		cp  Compressor
+		// outputs
+		b   []byte
+		err error
+	}{
+		{nil, nil, []byte{0, 0, 0, 0, 0}, nil},
+	} {
+		b, err := encode(protoCodec{}, test.msg, nil, nil, nil)
+		if err != test.err || !bytes.Equal(b, test.b) {
+			t.Fatalf("encode(_, _, %v, _) = %v, %v\nwant %v, %v", test.cp, b, err, test.b, test.err)
+		}
+	}
+}
+
+func TestCompress(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		data []byte
+		cp   Compressor
+		dc   Decompressor
+		// outputs
+		err error
+	}{
+		{make([]byte, 1024), &gzipCompressor{}, &gzipDecompressor{}, nil},
+	} {
+		b := new(bytes.Buffer)
+		if err := test.cp.Do(b, test.data); err != test.err {
+			t.Fatalf("Compressor.Do(_, %v) = %v, want %v", test.data, err, test.err)
+		}
+		if b.Len() >= len(test.data) {
+			t.Fatalf("The compressor fails to compress data.")
+		}
+		if p, err := test.dc.Do(b); err != nil || !bytes.Equal(test.data, p) {
+			t.Fatalf("Decompressor.Do(%v) = %v, %v, want %v, <nil>", b, p, err, test.data)
+		}
+	}
+}
+
+func TestToRPCErr(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		errIn error
+		// outputs
+		errOut *rpcError
+	}{
+		{transport.StreamError{codes.Unknown, ""}, Errorf(codes.Unknown, "").(*rpcError)},
+		{transport.ErrConnClosing, Errorf(codes.Internal, transport.ErrConnClosing.Desc).(*rpcError)},
+	} {
+		err := toRPCErr(test.errIn)
+		rpcErr, ok := err.(*rpcError)
+		if !ok {
+			t.Fatalf("toRPCErr{%v} returned type %T, want %T", test.errIn, err, rpcError{})
+		}
+		if *rpcErr != *test.errOut {
+			t.Fatalf("toRPCErr{%v} = %v \nwant %v", test.errIn, err, test.errOut)
+		}
+	}
+}
+
+func TestContextErr(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		errIn error
+		// outputs
+		errOut transport.StreamError
+	}{
+		{context.DeadlineExceeded, transport.StreamError{codes.DeadlineExceeded, context.DeadlineExceeded.Error()}},
+		{context.Canceled, transport.StreamError{codes.Canceled, context.Canceled.Error()}},
+	} {
+		err := transport.ContextErr(test.errIn)
+		if err != test.errOut {
+			t.Fatalf("ContextErr{%v} = %v \nwant %v", test.errIn, err, test.errOut)
+		}
+	}
+}
+
+func TestErrorsWithSameParameters(t *testing.T) {
+	const description = "some description"
+	e1 := Errorf(codes.AlreadyExists, description).(*rpcError)
+	e2 := Errorf(codes.AlreadyExists, description).(*rpcError)
+	if e1 == e2 {
+		t.Fatalf("Error interfaces should not be considered equal - e1: %p - %v  e2: %p - %v", e1, e1, e2, e2)
+	}
+	if Code(e1) != Code(e2) || ErrorDesc(e1) != ErrorDesc(e2) {
+		t.Fatalf("Expected errors to have same code and description - e1: %p - %v  e2: %p - %v", e1, e1, e2, e2)
+	}
+}
+
+// bmEncode benchmarks encoding a Protocol Buffer message containing mSize
+// bytes.
+func bmEncode(b *testing.B, mSize int) {
+	msg := &perfpb.Buffer{Body: make([]byte, mSize)}
+	encoded, _ := encode(protoCodec{}, msg, nil, nil, nil)
+	encodedSz := int64(len(encoded))
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		encode(protoCodec{}, msg, nil, nil, nil)
+	}
+	b.SetBytes(encodedSz)
+}
+
+func BenchmarkEncode1B(b *testing.B) {
+	bmEncode(b, 1)
+}
+
+func BenchmarkEncode1KiB(b *testing.B) {
+	bmEncode(b, 1024)
+}
+
+func BenchmarkEncode8KiB(b *testing.B) {
+	bmEncode(b, 8*1024)
+}
+
+func BenchmarkEncode64KiB(b *testing.B) {
+	bmEncode(b, 64*1024)
+}
+
+func BenchmarkEncode512KiB(b *testing.B) {
+	bmEncode(b, 512*1024)
+}
+
+func BenchmarkEncode1MiB(b *testing.B) {
+	bmEncode(b, 1024*1024)
+}
diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go
new file mode 100644
index 00000000000..b19a3c4af9b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/server.go
@@ -0,0 +1,1095 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"reflect"
+	"runtime"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/trace"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/tap"
+	"google.golang.org/grpc/transport"
+)
+
+type methodHandler func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor UnaryServerInterceptor) (interface{}, error)
+
+// MethodDesc represents an RPC service's method specification.
+type MethodDesc struct {
+	MethodName string
+	Handler    methodHandler
+}
+
+// ServiceDesc represents an RPC service's specification.
+type ServiceDesc struct {
+	ServiceName string
+	// The pointer to the service interface. Used to check whether the user
+	// provided implementation satisfies the interface requirements.
+	HandlerType interface{}
+	Methods     []MethodDesc
+	Streams     []StreamDesc
+	Metadata    interface{}
+}
+
+// service consists of the information of the server serving this service and
+// the methods in this service.
+type service struct {
+	server interface{} // the server for service methods
+	md     map[string]*MethodDesc
+	sd     map[string]*StreamDesc
+	mdata  interface{}
+}
+
+// Server is a gRPC server to serve RPC requests.
+type Server struct {
+	opts options
+
+	mu     sync.Mutex // guards following
+	lis    map[net.Listener]bool
+	conns  map[io.Closer]bool
+	drain  bool
+	ctx    context.Context
+	cancel context.CancelFunc
+	// A CondVar to let GracefulStop() blocks until all the pending RPCs are finished
+	// and all the transport goes away.
+	cv     *sync.Cond
+	m      map[string]*service // service name -> service info
+	events trace.EventLog
+}
+
+type options struct {
+	creds                credentials.TransportCredentials
+	codec                Codec
+	cp                   Compressor
+	dc                   Decompressor
+	maxMsgSize           int
+	unaryInt             UnaryServerInterceptor
+	streamInt            StreamServerInterceptor
+	inTapHandle          tap.ServerInHandle
+	statsHandler         stats.Handler
+	maxConcurrentStreams uint32
+	useHandlerImpl       bool // use http.Handler-based server
+	unknownStreamDesc    *StreamDesc
+	keepaliveParams      keepalive.ServerParameters
+}
+
+var defaultMaxMsgSize = 1024 * 1024 * 4 // use 4MB as the default message size limit
+
+// A ServerOption sets options.
+type ServerOption func(*options)
+
+// KeepaliveParams returns a ServerOption that sets keepalive and max-age parameters for the server.
+func KeepaliveParams(kp keepalive.ServerParameters) ServerOption {
+	return func(o *options) {
+		o.keepaliveParams = kp
+	}
+}
+
+// CustomCodec returns a ServerOption that sets a codec for message marshaling and unmarshaling.
+func CustomCodec(codec Codec) ServerOption {
+	return func(o *options) {
+		o.codec = codec
+	}
+}
+
+// RPCCompressor returns a ServerOption that sets a compressor for outbound messages.
+func RPCCompressor(cp Compressor) ServerOption {
+	return func(o *options) {
+		o.cp = cp
+	}
+}
+
+// RPCDecompressor returns a ServerOption that sets a decompressor for inbound messages.
+func RPCDecompressor(dc Decompressor) ServerOption {
+	return func(o *options) {
+		o.dc = dc
+	}
+}
+
+// MaxMsgSize returns a ServerOption to set the max message size in bytes for inbound mesages.
+// If this is not set, gRPC uses the default 4MB.
+func MaxMsgSize(m int) ServerOption {
+	return func(o *options) {
+		o.maxMsgSize = m
+	}
+}
+
+// MaxConcurrentStreams returns a ServerOption that will apply a limit on the number
+// of concurrent streams to each ServerTransport.
+func MaxConcurrentStreams(n uint32) ServerOption {
+	return func(o *options) {
+		o.maxConcurrentStreams = n
+	}
+}
+
+// Creds returns a ServerOption that sets credentials for server connections.
+func Creds(c credentials.TransportCredentials) ServerOption {
+	return func(o *options) {
+		o.creds = c
+	}
+}
+
+// UnaryInterceptor returns a ServerOption that sets the UnaryServerInterceptor for the
+// server. Only one unary interceptor can be installed. The construction of multiple
+// interceptors (e.g., chaining) can be implemented at the caller.
+func UnaryInterceptor(i UnaryServerInterceptor) ServerOption {
+	return func(o *options) {
+		if o.unaryInt != nil {
+			panic("The unary server interceptor has been set.")
+		}
+		o.unaryInt = i
+	}
+}
+
+// StreamInterceptor returns a ServerOption that sets the StreamServerInterceptor for the
+// server. Only one stream interceptor can be installed.
+func StreamInterceptor(i StreamServerInterceptor) ServerOption {
+	return func(o *options) {
+		if o.streamInt != nil {
+			panic("The stream server interceptor has been set.")
+		}
+		o.streamInt = i
+	}
+}
+
+// InTapHandle returns a ServerOption that sets the tap handle for all the server
+// transport to be created. Only one can be installed.
+func InTapHandle(h tap.ServerInHandle) ServerOption {
+	return func(o *options) {
+		if o.inTapHandle != nil {
+			panic("The tap handle has been set.")
+		}
+		o.inTapHandle = h
+	}
+}
+
+// StatsHandler returns a ServerOption that sets the stats handler for the server.
+func StatsHandler(h stats.Handler) ServerOption {
+	return func(o *options) {
+		o.statsHandler = h
+	}
+}
+
+// UnknownServiceHandler returns a ServerOption that allows for adding a custom
+// unknown service handler. The provided method is a bidi-streaming RPC service
+// handler that will be invoked instead of returning the the "unimplemented" gRPC
+// error whenever a request is received for an unregistered service or method.
+// The handling function has full access to the Context of the request and the
+// stream, and the invocation passes through interceptors.
+func UnknownServiceHandler(streamHandler StreamHandler) ServerOption {
+	return func(o *options) {
+		o.unknownStreamDesc = &StreamDesc{
+			StreamName: "unknown_service_handler",
+			Handler:    streamHandler,
+			// We need to assume that the users of the streamHandler will want to use both.
+			ClientStreams: true,
+			ServerStreams: true,
+		}
+	}
+}
+
+// NewServer creates a gRPC server which has no service registered and has not
+// started to accept requests yet.
+func NewServer(opt ...ServerOption) *Server {
+	var opts options
+	opts.maxMsgSize = defaultMaxMsgSize
+	for _, o := range opt {
+		o(&opts)
+	}
+	if opts.codec == nil {
+		// Set the default codec.
+		opts.codec = protoCodec{}
+	}
+	s := &Server{
+		lis:   make(map[net.Listener]bool),
+		opts:  opts,
+		conns: make(map[io.Closer]bool),
+		m:     make(map[string]*service),
+	}
+	s.cv = sync.NewCond(&s.mu)
+	s.ctx, s.cancel = context.WithCancel(context.Background())
+	if EnableTracing {
+		_, file, line, _ := runtime.Caller(1)
+		s.events = trace.NewEventLog("grpc.Server", fmt.Sprintf("%s:%d", file, line))
+	}
+	return s
+}
+
+// printf records an event in s's event log, unless s has been stopped.
+// REQUIRES s.mu is held.
+func (s *Server) printf(format string, a ...interface{}) {
+	if s.events != nil {
+		s.events.Printf(format, a...)
+	}
+}
+
+// errorf records an error in s's event log, unless s has been stopped.
+// REQUIRES s.mu is held.
+func (s *Server) errorf(format string, a ...interface{}) {
+	if s.events != nil {
+		s.events.Errorf(format, a...)
+	}
+}
+
+// RegisterService register a service and its implementation to the gRPC
+// server. Called from the IDL generated code. This must be called before
+// invoking Serve.
+func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) {
+	ht := reflect.TypeOf(sd.HandlerType).Elem()
+	st := reflect.TypeOf(ss)
+	if !st.Implements(ht) {
+		grpclog.Fatalf("grpc: Server.RegisterService found the handler of type %v that does not satisfy %v", st, ht)
+	}
+	s.register(sd, ss)
+}
+
+func (s *Server) register(sd *ServiceDesc, ss interface{}) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.printf("RegisterService(%q)", sd.ServiceName)
+	if _, ok := s.m[sd.ServiceName]; ok {
+		grpclog.Fatalf("grpc: Server.RegisterService found duplicate service registration for %q", sd.ServiceName)
+	}
+	srv := &service{
+		server: ss,
+		md:     make(map[string]*MethodDesc),
+		sd:     make(map[string]*StreamDesc),
+		mdata:  sd.Metadata,
+	}
+	for i := range sd.Methods {
+		d := &sd.Methods[i]
+		srv.md[d.MethodName] = d
+	}
+	for i := range sd.Streams {
+		d := &sd.Streams[i]
+		srv.sd[d.StreamName] = d
+	}
+	s.m[sd.ServiceName] = srv
+}
+
+// MethodInfo contains the information of an RPC including its method name and type.
+type MethodInfo struct {
+	// Name is the method name only, without the service name or package name.
+	Name string
+	// IsClientStream indicates whether the RPC is a client streaming RPC.
+	IsClientStream bool
+	// IsServerStream indicates whether the RPC is a server streaming RPC.
+	IsServerStream bool
+}
+
+// ServiceInfo contains unary RPC method info, streaming RPC methid info and metadata for a service.
+type ServiceInfo struct {
+	Methods []MethodInfo
+	// Metadata is the metadata specified in ServiceDesc when registering service.
+	Metadata interface{}
+}
+
+// GetServiceInfo returns a map from service names to ServiceInfo.
+// Service names include the package names, in the form of <package>.<service>.
+func (s *Server) GetServiceInfo() map[string]ServiceInfo {
+	ret := make(map[string]ServiceInfo)
+	for n, srv := range s.m {
+		methods := make([]MethodInfo, 0, len(srv.md)+len(srv.sd))
+		for m := range srv.md {
+			methods = append(methods, MethodInfo{
+				Name:           m,
+				IsClientStream: false,
+				IsServerStream: false,
+			})
+		}
+		for m, d := range srv.sd {
+			methods = append(methods, MethodInfo{
+				Name:           m,
+				IsClientStream: d.ClientStreams,
+				IsServerStream: d.ServerStreams,
+			})
+		}
+
+		ret[n] = ServiceInfo{
+			Methods:  methods,
+			Metadata: srv.mdata,
+		}
+	}
+	return ret
+}
+
+var (
+	// ErrServerStopped indicates that the operation is now illegal because of
+	// the server being stopped.
+	ErrServerStopped = errors.New("grpc: the server has been stopped")
+)
+
+func (s *Server) useTransportAuthenticator(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	if s.opts.creds == nil {
+		return rawConn, nil, nil
+	}
+	return s.opts.creds.ServerHandshake(rawConn)
+}
+
+// Serve accepts incoming connections on the listener lis, creating a new
+// ServerTransport and service goroutine for each. The service goroutines
+// read gRPC requests and then call the registered handlers to reply to them.
+// Serve returns when lis.Accept fails with fatal errors.  lis will be closed when
+// this method returns.
+// Serve always returns non-nil error.
+func (s *Server) Serve(lis net.Listener) error {
+	s.mu.Lock()
+	s.printf("serving")
+	if s.lis == nil {
+		s.mu.Unlock()
+		lis.Close()
+		return ErrServerStopped
+	}
+	s.lis[lis] = true
+	s.mu.Unlock()
+	defer func() {
+		s.mu.Lock()
+		if s.lis != nil && s.lis[lis] {
+			lis.Close()
+			delete(s.lis, lis)
+		}
+		s.mu.Unlock()
+	}()
+
+	var tempDelay time.Duration // how long to sleep on accept failure
+
+	for {
+		rawConn, err := lis.Accept()
+		if err != nil {
+			if ne, ok := err.(interface {
+				Temporary() bool
+			}); ok && ne.Temporary() {
+				if tempDelay == 0 {
+					tempDelay = 5 * time.Millisecond
+				} else {
+					tempDelay *= 2
+				}
+				if max := 1 * time.Second; tempDelay > max {
+					tempDelay = max
+				}
+				s.mu.Lock()
+				s.printf("Accept error: %v; retrying in %v", err, tempDelay)
+				s.mu.Unlock()
+				select {
+				case <-time.After(tempDelay):
+				case <-s.ctx.Done():
+				}
+				continue
+			}
+			s.mu.Lock()
+			s.printf("done serving; Accept = %v", err)
+			s.mu.Unlock()
+			return err
+		}
+		tempDelay = 0
+		// Start a new goroutine to deal with rawConn
+		// so we don't stall this Accept loop goroutine.
+		go s.handleRawConn(rawConn)
+	}
+}
+
+// handleRawConn is run in its own goroutine and handles a just-accepted
+// connection that has not had any I/O performed on it yet.
+func (s *Server) handleRawConn(rawConn net.Conn) {
+	conn, authInfo, err := s.useTransportAuthenticator(rawConn)
+	if err != nil {
+		s.mu.Lock()
+		s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err)
+		s.mu.Unlock()
+		grpclog.Printf("grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err)
+		// If serverHandShake returns ErrConnDispatched, keep rawConn open.
+		if err != credentials.ErrConnDispatched {
+			rawConn.Close()
+		}
+		return
+	}
+
+	s.mu.Lock()
+	if s.conns == nil {
+		s.mu.Unlock()
+		conn.Close()
+		return
+	}
+	s.mu.Unlock()
+
+	if s.opts.useHandlerImpl {
+		s.serveUsingHandler(conn)
+	} else {
+		s.serveHTTP2Transport(conn, authInfo)
+	}
+}
+
+// serveHTTP2Transport sets up a http/2 transport (using the
+// gRPC http2 server transport in transport/http2_server.go) and
+// serves streams on it.
+// This is run in its own goroutine (it does network I/O in
+// transport.NewServerTransport).
+func (s *Server) serveHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) {
+	config := &transport.ServerConfig{
+		MaxStreams:      s.opts.maxConcurrentStreams,
+		AuthInfo:        authInfo,
+		InTapHandle:     s.opts.inTapHandle,
+		StatsHandler:    s.opts.statsHandler,
+		KeepaliveParams: s.opts.keepaliveParams,
+	}
+	st, err := transport.NewServerTransport("http2", c, config)
+	if err != nil {
+		s.mu.Lock()
+		s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err)
+		s.mu.Unlock()
+		c.Close()
+		grpclog.Println("grpc: Server.Serve failed to create ServerTransport: ", err)
+		return
+	}
+	if !s.addConn(st) {
+		st.Close()
+		return
+	}
+	s.serveStreams(st)
+}
+
+func (s *Server) serveStreams(st transport.ServerTransport) {
+	defer s.removeConn(st)
+	defer st.Close()
+	var wg sync.WaitGroup
+	st.HandleStreams(func(stream *transport.Stream) {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			s.handleStream(st, stream, s.traceInfo(st, stream))
+		}()
+	}, func(ctx context.Context, method string) context.Context {
+		if !EnableTracing {
+			return ctx
+		}
+		tr := trace.New("grpc.Recv."+methodFamily(method), method)
+		return trace.NewContext(ctx, tr)
+	})
+	wg.Wait()
+}
+
+var _ http.Handler = (*Server)(nil)
+
+// serveUsingHandler is called from handleRawConn when s is configured
+// to handle requests via the http.Handler interface. It sets up a
+// net/http.Server to handle the just-accepted conn. The http.Server
+// is configured to route all incoming requests (all HTTP/2 streams)
+// to ServeHTTP, which creates a new ServerTransport for each stream.
+// serveUsingHandler blocks until conn closes.
+//
+// This codepath is only used when Server.TestingUseHandlerImpl has
+// been configured. This lets the end2end tests exercise the ServeHTTP
+// method as one of the environment types.
+//
+// conn is the *tls.Conn that's already been authenticated.
+func (s *Server) serveUsingHandler(conn net.Conn) {
+	if !s.addConn(conn) {
+		conn.Close()
+		return
+	}
+	defer s.removeConn(conn)
+	h2s := &http2.Server{
+		MaxConcurrentStreams: s.opts.maxConcurrentStreams,
+	}
+	h2s.ServeConn(conn, &http2.ServeConnOpts{
+		Handler: s,
+	})
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	st, err := transport.NewServerHandlerTransport(w, r)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if !s.addConn(st) {
+		st.Close()
+		return
+	}
+	defer s.removeConn(st)
+	s.serveStreams(st)
+}
+
+// traceInfo returns a traceInfo and associates it with stream, if tracing is enabled.
+// If tracing is not enabled, it returns nil.
+func (s *Server) traceInfo(st transport.ServerTransport, stream *transport.Stream) (trInfo *traceInfo) {
+	tr, ok := trace.FromContext(stream.Context())
+	if !ok {
+		return nil
+	}
+
+	trInfo = &traceInfo{
+		tr: tr,
+	}
+	trInfo.firstLine.client = false
+	trInfo.firstLine.remoteAddr = st.RemoteAddr()
+
+	if dl, ok := stream.Context().Deadline(); ok {
+		trInfo.firstLine.deadline = dl.Sub(time.Now())
+	}
+	return trInfo
+}
+
+func (s *Server) addConn(c io.Closer) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.conns == nil || s.drain {
+		return false
+	}
+	s.conns[c] = true
+	return true
+}
+
+func (s *Server) removeConn(c io.Closer) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.conns != nil {
+		delete(s.conns, c)
+		s.cv.Broadcast()
+	}
+}
+
+func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options) error {
+	var (
+		cbuf       *bytes.Buffer
+		outPayload *stats.OutPayload
+	)
+	if cp != nil {
+		cbuf = new(bytes.Buffer)
+	}
+	if s.opts.statsHandler != nil {
+		outPayload = &stats.OutPayload{}
+	}
+	p, err := encode(s.opts.codec, msg, cp, cbuf, outPayload)
+	if err != nil {
+		// This typically indicates a fatal issue (e.g., memory
+		// corruption or hardware faults) the application program
+		// cannot handle.
+		//
+		// TODO(zhaoq): There exist other options also such as only closing the
+		// faulty stream locally and remotely (Other streams can keep going). Find
+		// the optimal option.
+		grpclog.Fatalf("grpc: Server failed to encode response %v", err)
+	}
+	err = t.Write(stream, p, opts)
+	if err == nil && outPayload != nil {
+		outPayload.SentTime = time.Now()
+		s.opts.statsHandler.HandleRPC(stream.Context(), outPayload)
+	}
+	return err
+}
+
+func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, md *MethodDesc, trInfo *traceInfo) (err error) {
+	sh := s.opts.statsHandler
+	if sh != nil {
+		begin := &stats.Begin{
+			BeginTime: time.Now(),
+		}
+		sh.HandleRPC(stream.Context(), begin)
+	}
+	defer func() {
+		if sh != nil {
+			end := &stats.End{
+				EndTime: time.Now(),
+			}
+			if err != nil && err != io.EOF {
+				end.Error = toRPCErr(err)
+			}
+			sh.HandleRPC(stream.Context(), end)
+		}
+	}()
+	if trInfo != nil {
+		defer trInfo.tr.Finish()
+		trInfo.firstLine.client = false
+		trInfo.tr.LazyLog(&trInfo.firstLine, false)
+		defer func() {
+			if err != nil && err != io.EOF {
+				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+				trInfo.tr.SetError()
+			}
+		}()
+	}
+	if s.opts.cp != nil {
+		// NOTE: this needs to be ahead of all handling, https://github.com/grpc/grpc-go/issues/686.
+		stream.SetSendCompress(s.opts.cp.Type())
+	}
+	p := &parser{r: stream}
+	for {
+		pf, req, err := p.recvMsg(s.opts.maxMsgSize)
+		if err == io.EOF {
+			// The entire stream is done (for unary RPC only).
+			return err
+		}
+		if err == io.ErrUnexpectedEOF {
+			err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
+		}
+		if err != nil {
+			switch err := err.(type) {
+			case *rpcError:
+				if e := t.WriteStatus(stream, err.code, err.desc); e != nil {
+					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
+				}
+			case transport.ConnectionError:
+				// Nothing to do here.
+			case transport.StreamError:
+				if e := t.WriteStatus(stream, err.Code, err.Desc); e != nil {
+					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
+				}
+			default:
+				panic(fmt.Sprintf("grpc: Unexpected error (%T) from recvMsg: %v", err, err))
+			}
+			return err
+		}
+
+		if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil {
+			switch err := err.(type) {
+			case *rpcError:
+				if e := t.WriteStatus(stream, err.code, err.desc); e != nil {
+					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
+				}
+				return err
+			default:
+				if e := t.WriteStatus(stream, codes.Internal, err.Error()); e != nil {
+					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", e)
+				}
+				// TODO checkRecvPayload always return RPC error. Add a return here if necessary.
+			}
+		}
+		var inPayload *stats.InPayload
+		if sh != nil {
+			inPayload = &stats.InPayload{
+				RecvTime: time.Now(),
+			}
+		}
+		statusCode := codes.OK
+		statusDesc := ""
+		df := func(v interface{}) error {
+			if inPayload != nil {
+				inPayload.WireLength = len(req)
+			}
+			if pf == compressionMade {
+				var err error
+				req, err = s.opts.dc.Do(bytes.NewReader(req))
+				if err != nil {
+					if err := t.WriteStatus(stream, codes.Internal, err.Error()); err != nil {
+						grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
+					}
+					return Errorf(codes.Internal, err.Error())
+				}
+			}
+			if len(req) > s.opts.maxMsgSize {
+				// TODO: Revisit the error code. Currently keep it consistent with
+				// java implementation.
+				statusCode = codes.Internal
+				statusDesc = fmt.Sprintf("grpc: server received a message of %d bytes exceeding %d limit", len(req), s.opts.maxMsgSize)
+			}
+			if err := s.opts.codec.Unmarshal(req, v); err != nil {
+				return err
+			}
+			if inPayload != nil {
+				inPayload.Payload = v
+				inPayload.Data = req
+				inPayload.Length = len(req)
+				sh.HandleRPC(stream.Context(), inPayload)
+			}
+			if trInfo != nil {
+				trInfo.tr.LazyLog(&payload{sent: false, msg: v}, true)
+			}
+			return nil
+		}
+		reply, appErr := md.Handler(srv.server, stream.Context(), df, s.opts.unaryInt)
+		if appErr != nil {
+			if err, ok := appErr.(*rpcError); ok {
+				statusCode = err.code
+				statusDesc = err.desc
+			} else {
+				statusCode = convertCode(appErr)
+				statusDesc = appErr.Error()
+			}
+			if trInfo != nil && statusCode != codes.OK {
+				trInfo.tr.LazyLog(stringer(statusDesc), true)
+				trInfo.tr.SetError()
+			}
+			if err := t.WriteStatus(stream, statusCode, statusDesc); err != nil {
+				grpclog.Printf("grpc: Server.processUnaryRPC failed to write status: %v", err)
+			}
+			return Errorf(statusCode, statusDesc)
+		}
+		if trInfo != nil {
+			trInfo.tr.LazyLog(stringer("OK"), false)
+		}
+		opts := &transport.Options{
+			Last:  true,
+			Delay: false,
+		}
+		if err := s.sendResponse(t, stream, reply, s.opts.cp, opts); err != nil {
+			switch err := err.(type) {
+			case transport.ConnectionError:
+				// Nothing to do here.
+			case transport.StreamError:
+				statusCode = err.Code
+				statusDesc = err.Desc
+			default:
+				statusCode = codes.Unknown
+				statusDesc = err.Error()
+			}
+			return err
+		}
+		if trInfo != nil {
+			trInfo.tr.LazyLog(&payload{sent: true, msg: reply}, true)
+		}
+		errWrite := t.WriteStatus(stream, statusCode, statusDesc)
+		if statusCode != codes.OK {
+			return Errorf(statusCode, statusDesc)
+		}
+		return errWrite
+	}
+}
+
+func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transport.Stream, srv *service, sd *StreamDesc, trInfo *traceInfo) (err error) {
+	sh := s.opts.statsHandler
+	if sh != nil {
+		begin := &stats.Begin{
+			BeginTime: time.Now(),
+		}
+		sh.HandleRPC(stream.Context(), begin)
+	}
+	defer func() {
+		if sh != nil {
+			end := &stats.End{
+				EndTime: time.Now(),
+			}
+			if err != nil && err != io.EOF {
+				end.Error = toRPCErr(err)
+			}
+			sh.HandleRPC(stream.Context(), end)
+		}
+	}()
+	if s.opts.cp != nil {
+		stream.SetSendCompress(s.opts.cp.Type())
+	}
+	ss := &serverStream{
+		t:            t,
+		s:            stream,
+		p:            &parser{r: stream},
+		codec:        s.opts.codec,
+		cp:           s.opts.cp,
+		dc:           s.opts.dc,
+		maxMsgSize:   s.opts.maxMsgSize,
+		trInfo:       trInfo,
+		statsHandler: sh,
+	}
+	if ss.cp != nil {
+		ss.cbuf = new(bytes.Buffer)
+	}
+	if trInfo != nil {
+		trInfo.tr.LazyLog(&trInfo.firstLine, false)
+		defer func() {
+			ss.mu.Lock()
+			if err != nil && err != io.EOF {
+				ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+				ss.trInfo.tr.SetError()
+			}
+			ss.trInfo.tr.Finish()
+			ss.trInfo.tr = nil
+			ss.mu.Unlock()
+		}()
+	}
+	var appErr error
+	var server interface{}
+	if srv != nil {
+		server = srv.server
+	}
+	if s.opts.streamInt == nil {
+		appErr = sd.Handler(server, ss)
+	} else {
+		info := &StreamServerInfo{
+			FullMethod:     stream.Method(),
+			IsClientStream: sd.ClientStreams,
+			IsServerStream: sd.ServerStreams,
+		}
+		appErr = s.opts.streamInt(server, ss, info, sd.Handler)
+	}
+	if appErr != nil {
+		if err, ok := appErr.(*rpcError); ok {
+			ss.statusCode = err.code
+			ss.statusDesc = err.desc
+		} else if err, ok := appErr.(transport.StreamError); ok {
+			ss.statusCode = err.Code
+			ss.statusDesc = err.Desc
+		} else {
+			ss.statusCode = convertCode(appErr)
+			ss.statusDesc = appErr.Error()
+		}
+	}
+	if trInfo != nil {
+		ss.mu.Lock()
+		if ss.statusCode != codes.OK {
+			ss.trInfo.tr.LazyLog(stringer(ss.statusDesc), true)
+			ss.trInfo.tr.SetError()
+		} else {
+			ss.trInfo.tr.LazyLog(stringer("OK"), false)
+		}
+		ss.mu.Unlock()
+	}
+	errWrite := t.WriteStatus(ss.s, ss.statusCode, ss.statusDesc)
+	if ss.statusCode != codes.OK {
+		return Errorf(ss.statusCode, ss.statusDesc)
+	}
+	return errWrite
+
+}
+
+func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Stream, trInfo *traceInfo) {
+	sm := stream.Method()
+	if sm != "" && sm[0] == '/' {
+		sm = sm[1:]
+	}
+	pos := strings.LastIndex(sm, "/")
+	if pos == -1 {
+		if trInfo != nil {
+			trInfo.tr.LazyLog(&fmtStringer{"Malformed method name %q", []interface{}{sm}}, true)
+			trInfo.tr.SetError()
+		}
+		errDesc := fmt.Sprintf("malformed method name: %q", stream.Method())
+		if err := t.WriteStatus(stream, codes.InvalidArgument, errDesc); err != nil {
+			if trInfo != nil {
+				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+				trInfo.tr.SetError()
+			}
+			grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
+		}
+		if trInfo != nil {
+			trInfo.tr.Finish()
+		}
+		return
+	}
+	service := sm[:pos]
+	method := sm[pos+1:]
+	srv, ok := s.m[service]
+	if !ok {
+		if unknownDesc := s.opts.unknownStreamDesc; unknownDesc != nil {
+			s.processStreamingRPC(t, stream, nil, unknownDesc, trInfo)
+			return
+		}
+		if trInfo != nil {
+			trInfo.tr.LazyLog(&fmtStringer{"Unknown service %v", []interface{}{service}}, true)
+			trInfo.tr.SetError()
+		}
+		errDesc := fmt.Sprintf("unknown service %v", service)
+		if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil {
+			if trInfo != nil {
+				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+				trInfo.tr.SetError()
+			}
+			grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
+		}
+		if trInfo != nil {
+			trInfo.tr.Finish()
+		}
+		return
+	}
+	// Unary RPC or Streaming RPC?
+	if md, ok := srv.md[method]; ok {
+		s.processUnaryRPC(t, stream, srv, md, trInfo)
+		return
+	}
+	if sd, ok := srv.sd[method]; ok {
+		s.processStreamingRPC(t, stream, srv, sd, trInfo)
+		return
+	}
+	if trInfo != nil {
+		trInfo.tr.LazyLog(&fmtStringer{"Unknown method %v", []interface{}{method}}, true)
+		trInfo.tr.SetError()
+	}
+	if unknownDesc := s.opts.unknownStreamDesc; unknownDesc != nil {
+		s.processStreamingRPC(t, stream, nil, unknownDesc, trInfo)
+		return
+	}
+	errDesc := fmt.Sprintf("unknown method %v", method)
+	if err := t.WriteStatus(stream, codes.Unimplemented, errDesc); err != nil {
+		if trInfo != nil {
+			trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+			trInfo.tr.SetError()
+		}
+		grpclog.Printf("grpc: Server.handleStream failed to write status: %v", err)
+	}
+	if trInfo != nil {
+		trInfo.tr.Finish()
+	}
+}
+
+// Stop stops the gRPC server. It immediately closes all open
+// connections and listeners.
+// It cancels all active RPCs on the server side and the corresponding
+// pending RPCs on the client side will get notified by connection
+// errors.
+func (s *Server) Stop() {
+	s.mu.Lock()
+	listeners := s.lis
+	s.lis = nil
+	st := s.conns
+	s.conns = nil
+	// interrupt GracefulStop if Stop and GracefulStop are called concurrently.
+	s.cv.Broadcast()
+	s.mu.Unlock()
+
+	for lis := range listeners {
+		lis.Close()
+	}
+	for c := range st {
+		c.Close()
+	}
+
+	s.mu.Lock()
+	s.cancel()
+	if s.events != nil {
+		s.events.Finish()
+		s.events = nil
+	}
+	s.mu.Unlock()
+}
+
+// GracefulStop stops the gRPC server gracefully. It stops the server to accept new
+// connections and RPCs and blocks until all the pending RPCs are finished.
+func (s *Server) GracefulStop() {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.conns == nil {
+		return
+	}
+	for lis := range s.lis {
+		lis.Close()
+	}
+	s.lis = nil
+	s.cancel()
+	if !s.drain {
+		for c := range s.conns {
+			c.(transport.ServerTransport).Drain()
+		}
+		s.drain = true
+	}
+	for len(s.conns) != 0 {
+		s.cv.Wait()
+	}
+	s.conns = nil
+	if s.events != nil {
+		s.events.Finish()
+		s.events = nil
+	}
+}
+
+func init() {
+	internal.TestingCloseConns = func(arg interface{}) {
+		arg.(*Server).testingCloseConns()
+	}
+	internal.TestingUseHandlerImpl = func(arg interface{}) {
+		arg.(*Server).opts.useHandlerImpl = true
+	}
+}
+
+// testingCloseConns closes all existing transports but keeps s.lis
+// accepting new connections.
+func (s *Server) testingCloseConns() {
+	s.mu.Lock()
+	for c := range s.conns {
+		c.Close()
+		delete(s.conns, c)
+	}
+	s.mu.Unlock()
+}
+
+// SetHeader sets the header metadata.
+// When called multiple times, all the provided metadata will be merged.
+// All the metadata will be sent out when one of the following happens:
+//  - grpc.SendHeader() is called;
+//  - The first response is sent out;
+//  - An RPC status is sent out (error or success).
+func SetHeader(ctx context.Context, md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+	stream, ok := transport.StreamFromContext(ctx)
+	if !ok {
+		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+	}
+	return stream.SetHeader(md)
+}
+
+// SendHeader sends header metadata. It may be called at most once.
+// The provided md and headers set by SetHeader() will be sent.
+func SendHeader(ctx context.Context, md metadata.MD) error {
+	stream, ok := transport.StreamFromContext(ctx)
+	if !ok {
+		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+	}
+	t := stream.ServerTransport()
+	if t == nil {
+		grpclog.Fatalf("grpc: SendHeader: %v has no ServerTransport to send header metadata.", stream)
+	}
+	if err := t.WriteHeader(stream, md); err != nil {
+		return toRPCErr(err)
+	}
+	return nil
+}
+
+// SetTrailer sets the trailer metadata that will be sent when an RPC returns.
+// When called more than once, all the provided metadata will be merged.
+func SetTrailer(ctx context.Context, md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+	stream, ok := transport.StreamFromContext(ctx)
+	if !ok {
+		return Errorf(codes.Internal, "grpc: failed to fetch the stream from the context %v", ctx)
+	}
+	return stream.SetTrailer(md)
+}
diff --git a/vendor/google.golang.org/grpc/server_test.go b/vendor/google.golang.org/grpc/server_test.go
new file mode 100644
index 00000000000..53968cc2727
--- /dev/null
+++ b/vendor/google.golang.org/grpc/server_test.go
@@ -0,0 +1,113 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"net"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+type emptyServiceServer interface{}
+
+type testServer struct{}
+
+func TestStopBeforeServe(t *testing.T) {
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("failed to create listener: %v", err)
+	}
+
+	server := NewServer()
+	server.Stop()
+	err = server.Serve(lis)
+	if err != ErrServerStopped {
+		t.Fatalf("server.Serve() error = %v, want %v", err, ErrServerStopped)
+	}
+
+	// server.Serve is responsible for closing the listener, even if the
+	// server was already stopped.
+	err = lis.Close()
+	if got, want := ErrorDesc(err), "use of closed"; !strings.Contains(got, want) {
+		t.Errorf("Close() error = %q, want %q", got, want)
+	}
+}
+
+func TestGetServiceInfo(t *testing.T) {
+	testSd := ServiceDesc{
+		ServiceName: "grpc.testing.EmptyService",
+		HandlerType: (*emptyServiceServer)(nil),
+		Methods: []MethodDesc{
+			{
+				MethodName: "EmptyCall",
+				Handler:    nil,
+			},
+		},
+		Streams: []StreamDesc{
+			{
+				StreamName:    "EmptyStream",
+				Handler:       nil,
+				ServerStreams: false,
+				ClientStreams: true,
+			},
+		},
+		Metadata: []int{0, 2, 1, 3},
+	}
+
+	server := NewServer()
+	server.RegisterService(&testSd, &testServer{})
+
+	info := server.GetServiceInfo()
+	want := map[string]ServiceInfo{
+		"grpc.testing.EmptyService": {
+			Methods: []MethodInfo{
+				{
+					Name:           "EmptyCall",
+					IsClientStream: false,
+					IsServerStream: false,
+				},
+				{
+					Name:           "EmptyStream",
+					IsClientStream: true,
+					IsServerStream: false,
+				}},
+			Metadata: []int{0, 2, 1, 3},
+		},
+	}
+
+	if !reflect.DeepEqual(info, want) {
+		t.Errorf("GetServiceInfo() = %+v, want %+v", info, want)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/stats/grpc_testing/test.pb.go b/vendor/google.golang.org/grpc/stats/grpc_testing/test.pb.go
new file mode 100644
index 00000000000..b24dcd8d343
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stats/grpc_testing/test.pb.go
@@ -0,0 +1,225 @@
+// Code generated by protoc-gen-go.
+// source: test.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	test.proto
+
+It has these top-level messages:
+	SimpleRequest
+	SimpleResponse
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// Unary request.
+type SimpleRequest struct {
+	Id int32 `protobuf:"varint,2,opt,name=id" json:"id,omitempty"`
+}
+
+func (m *SimpleRequest) Reset()                    { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string            { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()               {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// Unary response, as configured by the request.
+type SimpleResponse struct {
+	Id int32 `protobuf:"varint,3,opt,name=id" json:"id,omitempty"`
+}
+
+func (m *SimpleResponse) Reset()                    { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string            { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()               {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func init() {
+	proto.RegisterType((*SimpleRequest)(nil), "grpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "grpc.testing.SimpleResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for TestService service
+
+type TestServiceClient interface {
+	// One request followed by one response.
+	// The server returns the client id as-is.
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error)
+}
+
+type testServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTestServiceClient(cc *grpc.ClientConn) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[0], c.cc, "/grpc.testing.TestService/FullDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceFullDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_FullDuplexCallClient interface {
+	Send(*SimpleRequest) error
+	Recv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceFullDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceFullDuplexCallClient) Send(m *SimpleRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallClient) Recv() (*SimpleResponse, error) {
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for TestService service
+
+type TestServiceServer interface {
+	// One request followed by one response.
+	// The server returns the client id as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+}
+
+func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
+	s.RegisterService(&_TestService_serviceDesc, srv)
+}
+
+func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.TestService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+
+type TestService_FullDuplexCallServer interface {
+	Send(*SimpleResponse) error
+	Recv() (*SimpleRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceFullDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceFullDuplexCallServer) Send(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallServer) Recv() (*SimpleRequest, error) {
+	m := new(SimpleRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _TestService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnaryCall",
+			Handler:    _TestService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "FullDuplexCall",
+			Handler:       _TestService_FullDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+func init() { proto.RegisterFile("test.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 167 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0x2a, 0x49, 0x2d, 0x2e,
+	0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x49, 0x2f, 0x2a, 0x48, 0xd6, 0x03, 0x09, 0x64,
+	0xe6, 0xa5, 0x2b, 0xc9, 0x73, 0xf1, 0x06, 0x67, 0xe6, 0x16, 0xe4, 0xa4, 0x06, 0xa5, 0x16, 0x96,
+	0xa6, 0x16, 0x97, 0x08, 0xf1, 0x71, 0x31, 0x65, 0xa6, 0x48, 0x30, 0x29, 0x30, 0x6a, 0xb0, 0x06,
+	0x31, 0x65, 0xa6, 0x28, 0x29, 0x70, 0xf1, 0xc1, 0x14, 0x14, 0x17, 0xe4, 0xe7, 0x15, 0xa7, 0x42,
+	0x55, 0x30, 0xc3, 0x54, 0x18, 0x2d, 0x63, 0xe4, 0xe2, 0x0e, 0x49, 0x2d, 0x2e, 0x09, 0x4e, 0x2d,
+	0x2a, 0xcb, 0x4c, 0x4e, 0x15, 0x72, 0xe3, 0xe2, 0x0c, 0xcd, 0x4b, 0x2c, 0xaa, 0x74, 0x4e, 0xcc,
+	0xc9, 0x11, 0x92, 0xd6, 0x43, 0xb6, 0x4e, 0x0f, 0xc5, 0x2e, 0x29, 0x19, 0xec, 0x92, 0x50, 0x7b,
+	0xfc, 0xb9, 0xf8, 0xdc, 0x4a, 0x73, 0x72, 0x5c, 0x4a, 0x0b, 0x72, 0x52, 0x2b, 0x28, 0x34, 0x4c,
+	0x83, 0xd1, 0x80, 0x31, 0x89, 0x0d, 0x1c, 0x00, 0xc6, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0x8d,
+	0x82, 0x5b, 0xdd, 0x0e, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/stats/grpc_testing/test.proto b/vendor/google.golang.org/grpc/stats/grpc_testing/test.proto
new file mode 100644
index 00000000000..54e6f744f17
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stats/grpc_testing/test.proto
@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package grpc.testing;
+
+message SimpleRequest {
+  int32 id = 2;
+}
+
+message SimpleResponse {
+  int32 id = 3;
+}
+
+// A simple test service.
+service TestService {
+  // One request followed by one response.
+  // The server returns the client id as-is.
+  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
+
+  // A sequence of requests with each request served by the server immediately.
+  // As one request could lead to multiple responses, this interface
+  // demonstrates the idea of full duplexing.
+  rpc FullDuplexCall(stream SimpleRequest) returns (stream SimpleResponse);
+}
diff --git a/vendor/google.golang.org/grpc/stats/handlers.go b/vendor/google.golang.org/grpc/stats/handlers.go
new file mode 100644
index 00000000000..26e1a8e2f08
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stats/handlers.go
@@ -0,0 +1,76 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package stats
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+// ConnTagInfo defines the relevant information needed by connection context tagger.
+type ConnTagInfo struct {
+	// RemoteAddr is the remote address of the corresponding connection.
+	RemoteAddr net.Addr
+	// LocalAddr is the local address of the corresponding connection.
+	LocalAddr net.Addr
+	// TODO add QOS related fields.
+}
+
+// RPCTagInfo defines the relevant information needed by RPC context tagger.
+type RPCTagInfo struct {
+	// FullMethodName is the RPC method in the format of /package.service/method.
+	FullMethodName string
+}
+
+// Handler defines the interface for the related stats handling (e.g., RPCs, connections).
+type Handler interface {
+	// TagRPC can attach some information to the given context.
+	// The returned context is used in the rest lifetime of the RPC.
+	TagRPC(context.Context, *RPCTagInfo) context.Context
+	// HandleRPC processes the RPC stats.
+	HandleRPC(context.Context, RPCStats)
+
+	// TagConn can attach some information to the given context.
+	// The returned context will be used for stats handling.
+	// For conn stats handling, the context used in HandleConn for this
+	// connection will be derived from the context returned.
+	// For RPC stats handling,
+	//  - On server side, the context used in HandleRPC for all RPCs on this
+	// connection will be derived from the context returned.
+	//  - On client side, the context is not derived from the context returned.
+	TagConn(context.Context, *ConnTagInfo) context.Context
+	// HandleConn processes the Conn stats.
+	HandleConn(context.Context, ConnStats)
+}
diff --git a/vendor/google.golang.org/grpc/stats/stats.go b/vendor/google.golang.org/grpc/stats/stats.go
new file mode 100644
index 00000000000..a82448a68bb
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stats/stats.go
@@ -0,0 +1,223 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package stats is for collecting and reporting various network and RPC stats.
+// This package is for monitoring purpose only. All fields are read-only.
+// All APIs are experimental.
+package stats // import "google.golang.org/grpc/stats"
+
+import (
+	"net"
+	"time"
+)
+
+// RPCStats contains stats information about RPCs.
+type RPCStats interface {
+	isRPCStats()
+	// IsClient returns true if this RPCStats is from client side.
+	IsClient() bool
+}
+
+// Begin contains stats when an RPC begins.
+// FailFast are only valid if Client is true.
+type Begin struct {
+	// Client is true if this Begin is from client side.
+	Client bool
+	// BeginTime is the time when the RPC begins.
+	BeginTime time.Time
+	// FailFast indicates if this RPC is failfast.
+	FailFast bool
+}
+
+// IsClient indicates if this is from client side.
+func (s *Begin) IsClient() bool { return s.Client }
+
+func (s *Begin) isRPCStats() {}
+
+// InPayload contains the information for an incoming payload.
+type InPayload struct {
+	// Client is true if this InPayload is from client side.
+	Client bool
+	// Payload is the payload with original type.
+	Payload interface{}
+	// Data is the serialized message payload.
+	Data []byte
+	// Length is the length of uncompressed data.
+	Length int
+	// WireLength is the length of data on wire (compressed, signed, encrypted).
+	WireLength int
+	// RecvTime is the time when the payload is received.
+	RecvTime time.Time
+}
+
+// IsClient indicates if this is from client side.
+func (s *InPayload) IsClient() bool { return s.Client }
+
+func (s *InPayload) isRPCStats() {}
+
+// InHeader contains stats when a header is received.
+// FullMethod, addresses and Compression are only valid if Client is false.
+type InHeader struct {
+	// Client is true if this InHeader is from client side.
+	Client bool
+	// WireLength is the wire length of header.
+	WireLength int
+
+	// FullMethod is the full RPC method string, i.e., /package.service/method.
+	FullMethod string
+	// RemoteAddr is the remote address of the corresponding connection.
+	RemoteAddr net.Addr
+	// LocalAddr is the local address of the corresponding connection.
+	LocalAddr net.Addr
+	// Compression is the compression algorithm used for the RPC.
+	Compression string
+}
+
+// IsClient indicates if this is from client side.
+func (s *InHeader) IsClient() bool { return s.Client }
+
+func (s *InHeader) isRPCStats() {}
+
+// InTrailer contains stats when a trailer is received.
+type InTrailer struct {
+	// Client is true if this InTrailer is from client side.
+	Client bool
+	// WireLength is the wire length of trailer.
+	WireLength int
+}
+
+// IsClient indicates if this is from client side.
+func (s *InTrailer) IsClient() bool { return s.Client }
+
+func (s *InTrailer) isRPCStats() {}
+
+// OutPayload contains the information for an outgoing payload.
+type OutPayload struct {
+	// Client is true if this OutPayload is from client side.
+	Client bool
+	// Payload is the payload with original type.
+	Payload interface{}
+	// Data is the serialized message payload.
+	Data []byte
+	// Length is the length of uncompressed data.
+	Length int
+	// WireLength is the length of data on wire (compressed, signed, encrypted).
+	WireLength int
+	// SentTime is the time when the payload is sent.
+	SentTime time.Time
+}
+
+// IsClient indicates if this is from client side.
+func (s *OutPayload) IsClient() bool { return s.Client }
+
+func (s *OutPayload) isRPCStats() {}
+
+// OutHeader contains stats when a header is sent.
+// FullMethod, addresses and Compression are only valid if Client is true.
+type OutHeader struct {
+	// Client is true if this OutHeader is from client side.
+	Client bool
+	// WireLength is the wire length of header.
+	WireLength int
+
+	// FullMethod is the full RPC method string, i.e., /package.service/method.
+	FullMethod string
+	// RemoteAddr is the remote address of the corresponding connection.
+	RemoteAddr net.Addr
+	// LocalAddr is the local address of the corresponding connection.
+	LocalAddr net.Addr
+	// Compression is the compression algorithm used for the RPC.
+	Compression string
+}
+
+// IsClient indicates if this is from client side.
+func (s *OutHeader) IsClient() bool { return s.Client }
+
+func (s *OutHeader) isRPCStats() {}
+
+// OutTrailer contains stats when a trailer is sent.
+type OutTrailer struct {
+	// Client is true if this OutTrailer is from client side.
+	Client bool
+	// WireLength is the wire length of trailer.
+	WireLength int
+}
+
+// IsClient indicates if this is from client side.
+func (s *OutTrailer) IsClient() bool { return s.Client }
+
+func (s *OutTrailer) isRPCStats() {}
+
+// End contains stats when an RPC ends.
+type End struct {
+	// Client is true if this End is from client side.
+	Client bool
+	// EndTime is the time when the RPC ends.
+	EndTime time.Time
+	// Error is the error just happened. Its type is gRPC error.
+	Error error
+}
+
+// IsClient indicates if this is from client side.
+func (s *End) IsClient() bool { return s.Client }
+
+func (s *End) isRPCStats() {}
+
+// ConnStats contains stats information about connections.
+type ConnStats interface {
+	isConnStats()
+	// IsClient returns true if this ConnStats is from client side.
+	IsClient() bool
+}
+
+// ConnBegin contains the stats of a connection when it is established.
+type ConnBegin struct {
+	// Client is true if this ConnBegin is from client side.
+	Client bool
+}
+
+// IsClient indicates if this is from client side.
+func (s *ConnBegin) IsClient() bool { return s.Client }
+
+func (s *ConnBegin) isConnStats() {}
+
+// ConnEnd contains the stats of a connection when it ends.
+type ConnEnd struct {
+	// Client is true if this ConnEnd is from client side.
+	Client bool
+}
+
+// IsClient indicates if this is from client side.
+func (s *ConnEnd) IsClient() bool { return s.Client }
+
+func (s *ConnEnd) isConnStats() {}
diff --git a/vendor/google.golang.org/grpc/stats/stats_test.go b/vendor/google.golang.org/grpc/stats/stats_test.go
new file mode 100644
index 00000000000..3e5424beb4b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stats/stats_test.go
@@ -0,0 +1,981 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package stats_test
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"reflect"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/stats"
+	testpb "google.golang.org/grpc/stats/grpc_testing"
+)
+
+func init() {
+	grpc.EnableTracing = false
+}
+
+type connCtxKey struct{}
+type rpcCtxKey struct{}
+
+var (
+	// For headers:
+	testMetadata = metadata.MD{
+		"key1": []string{"value1"},
+		"key2": []string{"value2"},
+	}
+	// For trailers:
+	testTrailerMetadata = metadata.MD{
+		"tkey1": []string{"trailerValue1"},
+		"tkey2": []string{"trailerValue2"},
+	}
+	// The id for which the service handler should return error.
+	errorID int32 = 32202
+)
+
+type testServer struct{}
+
+func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	md, ok := metadata.FromContext(ctx)
+	if ok {
+		if err := grpc.SendHeader(ctx, md); err != nil {
+			return nil, grpc.Errorf(grpc.Code(err), "grpc.SendHeader(_, %v) = %v, want <nil>", md, err)
+		}
+		if err := grpc.SetTrailer(ctx, testTrailerMetadata); err != nil {
+			return nil, grpc.Errorf(grpc.Code(err), "grpc.SetTrailer(_, %v) = %v, want <nil>", testTrailerMetadata, err)
+		}
+	}
+
+	if in.Id == errorID {
+		return nil, fmt.Errorf("got error id: %v", in.Id)
+	}
+
+	return &testpb.SimpleResponse{Id: in.Id}, nil
+}
+
+func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
+	md, ok := metadata.FromContext(stream.Context())
+	if ok {
+		if err := stream.SendHeader(md); err != nil {
+			return grpc.Errorf(grpc.Code(err), "%v.SendHeader(%v) = %v, want %v", stream, md, err, nil)
+		}
+		stream.SetTrailer(testTrailerMetadata)
+	}
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		if in.Id == errorID {
+			return fmt.Errorf("got error id: %v", in.Id)
+		}
+
+		if err := stream.Send(&testpb.SimpleResponse{Id: in.Id}); err != nil {
+			return err
+		}
+	}
+}
+
+// test is an end-to-end test. It should be created with the newTest
+// func, modified as needed, and then started with its startServer method.
+// It should be cleaned up with the tearDown method.
+type test struct {
+	t                  *testing.T
+	compress           string
+	clientStatsHandler stats.Handler
+	serverStatsHandler stats.Handler
+
+	testServer testpb.TestServiceServer // nil means none
+	// srv and srvAddr are set once startServer is called.
+	srv     *grpc.Server
+	srvAddr string
+
+	cc *grpc.ClientConn // nil until requested via clientConn
+}
+
+func (te *test) tearDown() {
+	if te.cc != nil {
+		te.cc.Close()
+		te.cc = nil
+	}
+	te.srv.Stop()
+}
+
+type testConfig struct {
+	compress string
+}
+
+// newTest returns a new test using the provided testing.T and
+// environment.  It is returned with default values. Tests should
+// modify it before calling its startServer and clientConn methods.
+func newTest(t *testing.T, tc *testConfig, ch stats.Handler, sh stats.Handler) *test {
+	te := &test{
+		t:                  t,
+		compress:           tc.compress,
+		clientStatsHandler: ch,
+		serverStatsHandler: sh,
+	}
+	return te
+}
+
+// startServer starts a gRPC server listening. Callers should defer a
+// call to te.tearDown to clean up.
+func (te *test) startServer(ts testpb.TestServiceServer) {
+	te.testServer = ts
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		te.t.Fatalf("Failed to listen: %v", err)
+	}
+	var opts []grpc.ServerOption
+	if te.compress == "gzip" {
+		opts = append(opts,
+			grpc.RPCCompressor(grpc.NewGZIPCompressor()),
+			grpc.RPCDecompressor(grpc.NewGZIPDecompressor()),
+		)
+	}
+	if te.serverStatsHandler != nil {
+		opts = append(opts, grpc.StatsHandler(te.serverStatsHandler))
+	}
+	s := grpc.NewServer(opts...)
+	te.srv = s
+	if te.testServer != nil {
+		testpb.RegisterTestServiceServer(s, te.testServer)
+	}
+	_, port, err := net.SplitHostPort(lis.Addr().String())
+	if err != nil {
+		te.t.Fatalf("Failed to parse listener address: %v", err)
+	}
+	addr := "127.0.0.1:" + port
+
+	go s.Serve(lis)
+	te.srvAddr = addr
+}
+
+func (te *test) clientConn() *grpc.ClientConn {
+	if te.cc != nil {
+		return te.cc
+	}
+	opts := []grpc.DialOption{grpc.WithInsecure(), grpc.WithBlock()}
+	if te.compress == "gzip" {
+		opts = append(opts,
+			grpc.WithCompressor(grpc.NewGZIPCompressor()),
+			grpc.WithDecompressor(grpc.NewGZIPDecompressor()),
+		)
+	}
+	if te.clientStatsHandler != nil {
+		opts = append(opts, grpc.WithStatsHandler(te.clientStatsHandler))
+	}
+
+	var err error
+	te.cc, err = grpc.Dial(te.srvAddr, opts...)
+	if err != nil {
+		te.t.Fatalf("Dial(%q) = %v", te.srvAddr, err)
+	}
+	return te.cc
+}
+
+type rpcConfig struct {
+	count     int  // Number of requests and responses for streaming RPCs.
+	success   bool // Whether the RPC should succeed or return error.
+	failfast  bool
+	streaming bool // Whether the rpc should be a streaming RPC.
+}
+
+func (te *test) doUnaryCall(c *rpcConfig) (*testpb.SimpleRequest, *testpb.SimpleResponse, error) {
+	var (
+		resp *testpb.SimpleResponse
+		req  *testpb.SimpleRequest
+		err  error
+	)
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	if c.success {
+		req = &testpb.SimpleRequest{Id: errorID + 1}
+	} else {
+		req = &testpb.SimpleRequest{Id: errorID}
+	}
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+
+	resp, err = tc.UnaryCall(ctx, req, grpc.FailFast(c.failfast))
+	return req, resp, err
+}
+
+func (te *test) doFullDuplexCallRoundtrip(c *rpcConfig) ([]*testpb.SimpleRequest, []*testpb.SimpleResponse, error) {
+	var (
+		reqs  []*testpb.SimpleRequest
+		resps []*testpb.SimpleResponse
+		err   error
+	)
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	stream, err := tc.FullDuplexCall(metadata.NewContext(context.Background(), testMetadata), grpc.FailFast(c.failfast))
+	if err != nil {
+		return reqs, resps, err
+	}
+	var startID int32
+	if !c.success {
+		startID = errorID
+	}
+	for i := 0; i < c.count; i++ {
+		req := &testpb.SimpleRequest{
+			Id: int32(i) + startID,
+		}
+		reqs = append(reqs, req)
+		if err = stream.Send(req); err != nil {
+			return reqs, resps, err
+		}
+		var resp *testpb.SimpleResponse
+		if resp, err = stream.Recv(); err != nil {
+			return reqs, resps, err
+		}
+		resps = append(resps, resp)
+	}
+	if err = stream.CloseSend(); err != nil && err != io.EOF {
+		return reqs, resps, err
+	}
+	if _, err = stream.Recv(); err != io.EOF {
+		return reqs, resps, err
+	}
+
+	return reqs, resps, nil
+}
+
+type expectedData struct {
+	method      string
+	serverAddr  string
+	compression string
+	reqIdx      int
+	requests    []*testpb.SimpleRequest
+	respIdx     int
+	responses   []*testpb.SimpleResponse
+	err         error
+	failfast    bool
+}
+
+type gotData struct {
+	ctx    context.Context
+	client bool
+	s      interface{} // This could be RPCStats or ConnStats.
+}
+
+const (
+	begin int = iota
+	end
+	inPayload
+	inHeader
+	inTrailer
+	outPayload
+	outHeader
+	outTrailer
+	connbegin
+	connend
+)
+
+func checkBegin(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.Begin
+	)
+	if st, ok = d.s.(*stats.Begin); !ok {
+		t.Fatalf("got %T, want Begin", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	if st.BeginTime.IsZero() {
+		t.Fatalf("st.BeginTime = %v, want <non-zero>", st.BeginTime)
+	}
+	if d.client {
+		if st.FailFast != e.failfast {
+			t.Fatalf("st.FailFast = %v, want %v", st.FailFast, e.failfast)
+		}
+	}
+}
+
+func checkInHeader(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.InHeader
+	)
+	if st, ok = d.s.(*stats.InHeader); !ok {
+		t.Fatalf("got %T, want InHeader", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	// TODO check real length, not just > 0.
+	if st.WireLength <= 0 {
+		t.Fatalf("st.Lenght = 0, want > 0")
+	}
+	if !d.client {
+		if st.FullMethod != e.method {
+			t.Fatalf("st.FullMethod = %s, want %v", st.FullMethod, e.method)
+		}
+		if st.LocalAddr.String() != e.serverAddr {
+			t.Fatalf("st.LocalAddr = %v, want %v", st.LocalAddr, e.serverAddr)
+		}
+		if st.Compression != e.compression {
+			t.Fatalf("st.Compression = %v, want %v", st.Compression, e.compression)
+		}
+
+		if connInfo, ok := d.ctx.Value(connCtxKey{}).(*stats.ConnTagInfo); ok {
+			if connInfo.RemoteAddr != st.RemoteAddr {
+				t.Fatalf("connInfo.RemoteAddr = %v, want %v", connInfo.RemoteAddr, st.RemoteAddr)
+			}
+			if connInfo.LocalAddr != st.LocalAddr {
+				t.Fatalf("connInfo.LocalAddr = %v, want %v", connInfo.LocalAddr, st.LocalAddr)
+			}
+		} else {
+			t.Fatalf("got context %v, want one with connCtxKey", d.ctx)
+		}
+		if rpcInfo, ok := d.ctx.Value(rpcCtxKey{}).(*stats.RPCTagInfo); ok {
+			if rpcInfo.FullMethodName != st.FullMethod {
+				t.Fatalf("rpcInfo.FullMethod = %s, want %v", rpcInfo.FullMethodName, st.FullMethod)
+			}
+		} else {
+			t.Fatalf("got context %v, want one with rpcCtxKey", d.ctx)
+		}
+	}
+}
+
+func checkInPayload(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.InPayload
+	)
+	if st, ok = d.s.(*stats.InPayload); !ok {
+		t.Fatalf("got %T, want InPayload", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	if d.client {
+		b, err := proto.Marshal(e.responses[e.respIdx])
+		if err != nil {
+			t.Fatalf("failed to marshal message: %v", err)
+		}
+		if reflect.TypeOf(st.Payload) != reflect.TypeOf(e.responses[e.respIdx]) {
+			t.Fatalf("st.Payload = %T, want %T", st.Payload, e.responses[e.respIdx])
+		}
+		e.respIdx++
+		if string(st.Data) != string(b) {
+			t.Fatalf("st.Data = %v, want %v", st.Data, b)
+		}
+		if st.Length != len(b) {
+			t.Fatalf("st.Lenght = %v, want %v", st.Length, len(b))
+		}
+	} else {
+		b, err := proto.Marshal(e.requests[e.reqIdx])
+		if err != nil {
+			t.Fatalf("failed to marshal message: %v", err)
+		}
+		if reflect.TypeOf(st.Payload) != reflect.TypeOf(e.requests[e.reqIdx]) {
+			t.Fatalf("st.Payload = %T, want %T", st.Payload, e.requests[e.reqIdx])
+		}
+		e.reqIdx++
+		if string(st.Data) != string(b) {
+			t.Fatalf("st.Data = %v, want %v", st.Data, b)
+		}
+		if st.Length != len(b) {
+			t.Fatalf("st.Lenght = %v, want %v", st.Length, len(b))
+		}
+	}
+	// TODO check WireLength and ReceivedTime.
+	if st.RecvTime.IsZero() {
+		t.Fatalf("st.ReceivedTime = %v, want <non-zero>", st.RecvTime)
+	}
+}
+
+func checkInTrailer(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.InTrailer
+	)
+	if st, ok = d.s.(*stats.InTrailer); !ok {
+		t.Fatalf("got %T, want InTrailer", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	// TODO check real length, not just > 0.
+	if st.WireLength <= 0 {
+		t.Fatalf("st.Lenght = 0, want > 0")
+	}
+}
+
+func checkOutHeader(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.OutHeader
+	)
+	if st, ok = d.s.(*stats.OutHeader); !ok {
+		t.Fatalf("got %T, want OutHeader", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	// TODO check real length, not just > 0.
+	if st.WireLength <= 0 {
+		t.Fatalf("st.Lenght = 0, want > 0")
+	}
+	if d.client {
+		if st.FullMethod != e.method {
+			t.Fatalf("st.FullMethod = %s, want %v", st.FullMethod, e.method)
+		}
+		if st.RemoteAddr.String() != e.serverAddr {
+			t.Fatalf("st.RemoteAddr = %v, want %v", st.RemoteAddr, e.serverAddr)
+		}
+		if st.Compression != e.compression {
+			t.Fatalf("st.Compression = %v, want %v", st.Compression, e.compression)
+		}
+
+		if rpcInfo, ok := d.ctx.Value(rpcCtxKey{}).(*stats.RPCTagInfo); ok {
+			if rpcInfo.FullMethodName != st.FullMethod {
+				t.Fatalf("rpcInfo.FullMethod = %s, want %v", rpcInfo.FullMethodName, st.FullMethod)
+			}
+		} else {
+			t.Fatalf("got context %v, want one with rpcCtxKey", d.ctx)
+		}
+	}
+}
+
+func checkOutPayload(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.OutPayload
+	)
+	if st, ok = d.s.(*stats.OutPayload); !ok {
+		t.Fatalf("got %T, want OutPayload", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	if d.client {
+		b, err := proto.Marshal(e.requests[e.reqIdx])
+		if err != nil {
+			t.Fatalf("failed to marshal message: %v", err)
+		}
+		if reflect.TypeOf(st.Payload) != reflect.TypeOf(e.requests[e.reqIdx]) {
+			t.Fatalf("st.Payload = %T, want %T", st.Payload, e.requests[e.reqIdx])
+		}
+		e.reqIdx++
+		if string(st.Data) != string(b) {
+			t.Fatalf("st.Data = %v, want %v", st.Data, b)
+		}
+		if st.Length != len(b) {
+			t.Fatalf("st.Lenght = %v, want %v", st.Length, len(b))
+		}
+	} else {
+		b, err := proto.Marshal(e.responses[e.respIdx])
+		if err != nil {
+			t.Fatalf("failed to marshal message: %v", err)
+		}
+		if reflect.TypeOf(st.Payload) != reflect.TypeOf(e.responses[e.respIdx]) {
+			t.Fatalf("st.Payload = %T, want %T", st.Payload, e.responses[e.respIdx])
+		}
+		e.respIdx++
+		if string(st.Data) != string(b) {
+			t.Fatalf("st.Data = %v, want %v", st.Data, b)
+		}
+		if st.Length != len(b) {
+			t.Fatalf("st.Lenght = %v, want %v", st.Length, len(b))
+		}
+	}
+	// TODO check WireLength and ReceivedTime.
+	if st.SentTime.IsZero() {
+		t.Fatalf("st.SentTime = %v, want <non-zero>", st.SentTime)
+	}
+}
+
+func checkOutTrailer(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.OutTrailer
+	)
+	if st, ok = d.s.(*stats.OutTrailer); !ok {
+		t.Fatalf("got %T, want OutTrailer", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	if st.Client {
+		t.Fatalf("st IsClient = true, want false")
+	}
+	// TODO check real length, not just > 0.
+	if st.WireLength <= 0 {
+		t.Fatalf("st.Lenght = 0, want > 0")
+	}
+}
+
+func checkEnd(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.End
+	)
+	if st, ok = d.s.(*stats.End); !ok {
+		t.Fatalf("got %T, want End", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	if st.EndTime.IsZero() {
+		t.Fatalf("st.EndTime = %v, want <non-zero>", st.EndTime)
+	}
+	if grpc.Code(st.Error) != grpc.Code(e.err) || grpc.ErrorDesc(st.Error) != grpc.ErrorDesc(e.err) {
+		t.Fatalf("st.Error = %v, want %v", st.Error, e.err)
+	}
+}
+
+func checkConnBegin(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.ConnBegin
+	)
+	if st, ok = d.s.(*stats.ConnBegin); !ok {
+		t.Fatalf("got %T, want ConnBegin", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	st.IsClient() // TODO remove this.
+}
+
+func checkConnEnd(t *testing.T, d *gotData, e *expectedData) {
+	var (
+		ok bool
+		st *stats.ConnEnd
+	)
+	if st, ok = d.s.(*stats.ConnEnd); !ok {
+		t.Fatalf("got %T, want ConnEnd", d.s)
+	}
+	if d.ctx == nil {
+		t.Fatalf("d.ctx = nil, want <non-nil>")
+	}
+	st.IsClient() // TODO remove this.
+}
+
+type statshandler struct {
+	mu      sync.Mutex
+	gotRPC  []*gotData
+	gotConn []*gotData
+}
+
+func (h *statshandler) TagConn(ctx context.Context, info *stats.ConnTagInfo) context.Context {
+	return context.WithValue(ctx, connCtxKey{}, info)
+}
+
+func (h *statshandler) TagRPC(ctx context.Context, info *stats.RPCTagInfo) context.Context {
+	return context.WithValue(ctx, rpcCtxKey{}, info)
+}
+
+func (h *statshandler) HandleConn(ctx context.Context, s stats.ConnStats) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	h.gotConn = append(h.gotConn, &gotData{ctx, s.IsClient(), s})
+}
+
+func (h *statshandler) HandleRPC(ctx context.Context, s stats.RPCStats) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	h.gotRPC = append(h.gotRPC, &gotData{ctx, s.IsClient(), s})
+}
+
+func checkConnStats(t *testing.T, got []*gotData) {
+	if len(got) <= 0 || len(got)%2 != 0 {
+		for i, g := range got {
+			t.Errorf(" - %v, %T = %+v, ctx: %v", i, g.s, g.s, g.ctx)
+		}
+		t.Fatalf("got %v stats, want even positive number", len(got))
+	}
+	// The first conn stats must be a ConnBegin.
+	checkConnBegin(t, got[0], nil)
+	// The last conn stats must be a ConnEnd.
+	checkConnEnd(t, got[len(got)-1], nil)
+}
+
+func checkServerStats(t *testing.T, got []*gotData, expect *expectedData, checkFuncs []func(t *testing.T, d *gotData, e *expectedData)) {
+	if len(got) != len(checkFuncs) {
+		for i, g := range got {
+			t.Errorf(" - %v, %T", i, g.s)
+		}
+		t.Fatalf("got %v stats, want %v stats", len(got), len(checkFuncs))
+	}
+
+	var rpcctx context.Context
+	for i := 0; i < len(got); i++ {
+		if _, ok := got[i].s.(stats.RPCStats); ok {
+			if rpcctx != nil && got[i].ctx != rpcctx {
+				t.Fatalf("got different contexts with stats %T", got[i].s)
+			}
+			rpcctx = got[i].ctx
+		}
+	}
+
+	for i, f := range checkFuncs {
+		f(t, got[i], expect)
+	}
+}
+
+func testServerStats(t *testing.T, tc *testConfig, cc *rpcConfig, checkFuncs []func(t *testing.T, d *gotData, e *expectedData)) {
+	h := &statshandler{}
+	te := newTest(t, tc, nil, h)
+	te.startServer(&testServer{})
+	defer te.tearDown()
+
+	var (
+		reqs  []*testpb.SimpleRequest
+		resps []*testpb.SimpleResponse
+		err   error
+	)
+	if !cc.streaming {
+		req, resp, e := te.doUnaryCall(cc)
+		reqs = []*testpb.SimpleRequest{req}
+		resps = []*testpb.SimpleResponse{resp}
+		err = e
+	} else {
+		reqs, resps, err = te.doFullDuplexCallRoundtrip(cc)
+	}
+	if cc.success != (err == nil) {
+		t.Fatalf("cc.success: %v, got error: %v", cc.success, err)
+	}
+	te.cc.Close()
+	te.srv.GracefulStop() // Wait for the server to stop.
+
+	for {
+		h.mu.Lock()
+		if len(h.gotRPC) >= len(checkFuncs) {
+			h.mu.Unlock()
+			break
+		}
+		h.mu.Unlock()
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	for {
+		h.mu.Lock()
+		if _, ok := h.gotConn[len(h.gotConn)-1].s.(*stats.ConnEnd); ok {
+			h.mu.Unlock()
+			break
+		}
+		h.mu.Unlock()
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	expect := &expectedData{
+		serverAddr:  te.srvAddr,
+		compression: tc.compress,
+		requests:    reqs,
+		responses:   resps,
+		err:         err,
+	}
+	if !cc.streaming {
+		expect.method = "/grpc.testing.TestService/UnaryCall"
+	} else {
+		expect.method = "/grpc.testing.TestService/FullDuplexCall"
+	}
+
+	checkConnStats(t, h.gotConn)
+	checkServerStats(t, h.gotRPC, expect, checkFuncs)
+}
+
+func TestServerStatsUnaryRPC(t *testing.T) {
+	testServerStats(t, &testConfig{compress: ""}, &rpcConfig{success: true}, []func(t *testing.T, d *gotData, e *expectedData){
+		checkInHeader,
+		checkBegin,
+		checkInPayload,
+		checkOutHeader,
+		checkOutPayload,
+		checkOutTrailer,
+		checkEnd,
+	})
+}
+
+func TestServerStatsUnaryRPCError(t *testing.T) {
+	testServerStats(t, &testConfig{compress: ""}, &rpcConfig{success: false}, []func(t *testing.T, d *gotData, e *expectedData){
+		checkInHeader,
+		checkBegin,
+		checkInPayload,
+		checkOutHeader,
+		checkOutTrailer,
+		checkEnd,
+	})
+}
+
+func TestServerStatsStreamingRPC(t *testing.T) {
+	count := 5
+	checkFuncs := []func(t *testing.T, d *gotData, e *expectedData){
+		checkInHeader,
+		checkBegin,
+		checkOutHeader,
+	}
+	ioPayFuncs := []func(t *testing.T, d *gotData, e *expectedData){
+		checkInPayload,
+		checkOutPayload,
+	}
+	for i := 0; i < count; i++ {
+		checkFuncs = append(checkFuncs, ioPayFuncs...)
+	}
+	checkFuncs = append(checkFuncs,
+		checkOutTrailer,
+		checkEnd,
+	)
+	testServerStats(t, &testConfig{compress: "gzip"}, &rpcConfig{count: count, success: true, streaming: true}, checkFuncs)
+}
+
+func TestServerStatsStreamingRPCError(t *testing.T) {
+	count := 5
+	testServerStats(t, &testConfig{compress: "gzip"}, &rpcConfig{count: count, success: false, streaming: true}, []func(t *testing.T, d *gotData, e *expectedData){
+		checkInHeader,
+		checkBegin,
+		checkOutHeader,
+		checkInPayload,
+		checkOutTrailer,
+		checkEnd,
+	})
+}
+
+type checkFuncWithCount struct {
+	f func(t *testing.T, d *gotData, e *expectedData)
+	c int // expected count
+}
+
+func checkClientStats(t *testing.T, got []*gotData, expect *expectedData, checkFuncs map[int]*checkFuncWithCount) {
+	var expectLen int
+	for _, v := range checkFuncs {
+		expectLen += v.c
+	}
+	if len(got) != expectLen {
+		for i, g := range got {
+			t.Errorf(" - %v, %T", i, g.s)
+		}
+		t.Fatalf("got %v stats, want %v stats", len(got), expectLen)
+	}
+
+	var rpcctx context.Context
+	for i := 0; i < len(got); i++ {
+		if _, ok := got[i].s.(stats.RPCStats); ok {
+			if rpcctx != nil && got[i].ctx != rpcctx {
+				t.Fatalf("got different contexts with stats %T", got[i].s)
+			}
+			rpcctx = got[i].ctx
+		}
+	}
+
+	for _, s := range got {
+		switch s.s.(type) {
+		case *stats.Begin:
+			if checkFuncs[begin].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[begin].f(t, s, expect)
+			checkFuncs[begin].c--
+		case *stats.OutHeader:
+			if checkFuncs[outHeader].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[outHeader].f(t, s, expect)
+			checkFuncs[outHeader].c--
+		case *stats.OutPayload:
+			if checkFuncs[outPayload].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[outPayload].f(t, s, expect)
+			checkFuncs[outPayload].c--
+		case *stats.InHeader:
+			if checkFuncs[inHeader].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[inHeader].f(t, s, expect)
+			checkFuncs[inHeader].c--
+		case *stats.InPayload:
+			if checkFuncs[inPayload].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[inPayload].f(t, s, expect)
+			checkFuncs[inPayload].c--
+		case *stats.InTrailer:
+			if checkFuncs[inTrailer].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[inTrailer].f(t, s, expect)
+			checkFuncs[inTrailer].c--
+		case *stats.End:
+			if checkFuncs[end].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[end].f(t, s, expect)
+			checkFuncs[end].c--
+		case *stats.ConnBegin:
+			if checkFuncs[connbegin].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[connbegin].f(t, s, expect)
+			checkFuncs[connbegin].c--
+		case *stats.ConnEnd:
+			if checkFuncs[connend].c <= 0 {
+				t.Fatalf("unexpected stats: %T", s.s)
+			}
+			checkFuncs[connend].f(t, s, expect)
+			checkFuncs[connend].c--
+		default:
+			t.Fatalf("unexpected stats: %T", s.s)
+		}
+	}
+}
+
+func testClientStats(t *testing.T, tc *testConfig, cc *rpcConfig, checkFuncs map[int]*checkFuncWithCount) {
+	h := &statshandler{}
+	te := newTest(t, tc, h, nil)
+	te.startServer(&testServer{})
+	defer te.tearDown()
+
+	var (
+		reqs  []*testpb.SimpleRequest
+		resps []*testpb.SimpleResponse
+		err   error
+	)
+	if !cc.streaming {
+		req, resp, e := te.doUnaryCall(cc)
+		reqs = []*testpb.SimpleRequest{req}
+		resps = []*testpb.SimpleResponse{resp}
+		err = e
+	} else {
+		reqs, resps, err = te.doFullDuplexCallRoundtrip(cc)
+	}
+	if cc.success != (err == nil) {
+		t.Fatalf("cc.success: %v, got error: %v", cc.success, err)
+	}
+	te.cc.Close()
+	te.srv.GracefulStop() // Wait for the server to stop.
+
+	lenRPCStats := 0
+	for _, v := range checkFuncs {
+		lenRPCStats += v.c
+	}
+	for {
+		h.mu.Lock()
+		if len(h.gotRPC) >= lenRPCStats {
+			h.mu.Unlock()
+			break
+		}
+		h.mu.Unlock()
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	for {
+		h.mu.Lock()
+		if _, ok := h.gotConn[len(h.gotConn)-1].s.(*stats.ConnEnd); ok {
+			h.mu.Unlock()
+			break
+		}
+		h.mu.Unlock()
+		time.Sleep(10 * time.Millisecond)
+	}
+
+	expect := &expectedData{
+		serverAddr:  te.srvAddr,
+		compression: tc.compress,
+		requests:    reqs,
+		responses:   resps,
+		failfast:    cc.failfast,
+		err:         err,
+	}
+	if !cc.streaming {
+		expect.method = "/grpc.testing.TestService/UnaryCall"
+	} else {
+		expect.method = "/grpc.testing.TestService/FullDuplexCall"
+	}
+
+	checkConnStats(t, h.gotConn)
+	checkClientStats(t, h.gotRPC, expect, checkFuncs)
+}
+
+func TestClientStatsUnaryRPC(t *testing.T) {
+	testClientStats(t, &testConfig{compress: ""}, &rpcConfig{success: true, failfast: false}, map[int]*checkFuncWithCount{
+		begin:      {checkBegin, 1},
+		outHeader:  {checkOutHeader, 1},
+		outPayload: {checkOutPayload, 1},
+		inHeader:   {checkInHeader, 1},
+		inPayload:  {checkInPayload, 1},
+		inTrailer:  {checkInTrailer, 1},
+		end:        {checkEnd, 1},
+	})
+}
+
+func TestClientStatsUnaryRPCError(t *testing.T) {
+	testClientStats(t, &testConfig{compress: ""}, &rpcConfig{success: false, failfast: false}, map[int]*checkFuncWithCount{
+		begin:      {checkBegin, 1},
+		outHeader:  {checkOutHeader, 1},
+		outPayload: {checkOutPayload, 1},
+		inHeader:   {checkInHeader, 1},
+		inTrailer:  {checkInTrailer, 1},
+		end:        {checkEnd, 1},
+	})
+}
+
+func TestClientStatsStreamingRPC(t *testing.T) {
+	count := 5
+	testClientStats(t, &testConfig{compress: "gzip"}, &rpcConfig{count: count, success: true, failfast: false, streaming: true}, map[int]*checkFuncWithCount{
+		begin:      {checkBegin, 1},
+		outHeader:  {checkOutHeader, 1},
+		outPayload: {checkOutPayload, count},
+		inHeader:   {checkInHeader, 1},
+		inPayload:  {checkInPayload, count},
+		inTrailer:  {checkInTrailer, 1},
+		end:        {checkEnd, 1},
+	})
+}
+
+func TestClientStatsStreamingRPCError(t *testing.T) {
+	count := 5
+	testClientStats(t, &testConfig{compress: "gzip"}, &rpcConfig{count: count, success: false, failfast: false, streaming: true}, map[int]*checkFuncWithCount{
+		begin:      {checkBegin, 1},
+		outHeader:  {checkOutHeader, 1},
+		outPayload: {checkOutPayload, 1},
+		inHeader:   {checkInHeader, 1},
+		inTrailer:  {checkInTrailer, 1},
+		end:        {checkEnd, 1},
+	})
+}
diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go
new file mode 100644
index 00000000000..0ef2077ce25
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stream.go
@@ -0,0 +1,626 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/trace"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/transport"
+)
+
+// StreamHandler defines the handler called by gRPC server to complete the
+// execution of a streaming RPC.
+type StreamHandler func(srv interface{}, stream ServerStream) error
+
+// StreamDesc represents a streaming RPC service's method specification.
+type StreamDesc struct {
+	StreamName string
+	Handler    StreamHandler
+
+	// At least one of these is true.
+	ServerStreams bool
+	ClientStreams bool
+}
+
+// Stream defines the common interface a client or server stream has to satisfy.
+type Stream interface {
+	// Context returns the context for this stream.
+	Context() context.Context
+	// SendMsg blocks until it sends m, the stream is done or the stream
+	// breaks.
+	// On error, it aborts the stream and returns an RPC status on client
+	// side. On server side, it simply returns the error to the caller.
+	// SendMsg is called by generated code. Also Users can call SendMsg
+	// directly when it is really needed in their use cases.
+	SendMsg(m interface{}) error
+	// RecvMsg blocks until it receives a message or the stream is
+	// done. On client side, it returns io.EOF when the stream is done. On
+	// any other error, it aborts the stream and returns an RPC status. On
+	// server side, it simply returns the error to the caller.
+	RecvMsg(m interface{}) error
+}
+
+// ClientStream defines the interface a client stream has to satisfy.
+type ClientStream interface {
+	// Header returns the header metadata received from the server if there
+	// is any. It blocks if the metadata is not ready to read.
+	Header() (metadata.MD, error)
+	// Trailer returns the trailer metadata from the server, if there is any.
+	// It must only be called after stream.CloseAndRecv has returned, or
+	// stream.Recv has returned a non-nil error (including io.EOF).
+	Trailer() metadata.MD
+	// CloseSend closes the send direction of the stream. It closes the stream
+	// when non-nil error is met.
+	CloseSend() error
+	Stream
+}
+
+// NewClientStream creates a new Stream for the client side. This is called
+// by generated code.
+func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
+	if cc.dopts.streamInt != nil {
+		return cc.dopts.streamInt(ctx, desc, cc, method, newClientStream, opts...)
+	}
+	return newClientStream(ctx, desc, cc, method, opts...)
+}
+
+func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (_ ClientStream, err error) {
+	var (
+		t      transport.ClientTransport
+		s      *transport.Stream
+		put    func()
+		cancel context.CancelFunc
+	)
+	c := defaultCallInfo
+	if mc, ok := cc.getMethodConfig(method); ok {
+		c.failFast = !mc.WaitForReady
+		if mc.Timeout > 0 {
+			ctx, cancel = context.WithTimeout(ctx, mc.Timeout)
+		}
+	}
+	for _, o := range opts {
+		if err := o.before(&c); err != nil {
+			return nil, toRPCErr(err)
+		}
+	}
+	callHdr := &transport.CallHdr{
+		Host:   cc.authority,
+		Method: method,
+		Flush:  desc.ServerStreams && desc.ClientStreams,
+	}
+	if cc.dopts.cp != nil {
+		callHdr.SendCompress = cc.dopts.cp.Type()
+	}
+	var trInfo traceInfo
+	if EnableTracing {
+		trInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
+		trInfo.firstLine.client = true
+		if deadline, ok := ctx.Deadline(); ok {
+			trInfo.firstLine.deadline = deadline.Sub(time.Now())
+		}
+		trInfo.tr.LazyLog(&trInfo.firstLine, false)
+		ctx = trace.NewContext(ctx, trInfo.tr)
+		defer func() {
+			if err != nil {
+				// Need to call tr.finish() if error is returned.
+				// Because tr will not be returned to caller.
+				trInfo.tr.LazyPrintf("RPC: [%v]", err)
+				trInfo.tr.SetError()
+				trInfo.tr.Finish()
+			}
+		}()
+	}
+	sh := cc.dopts.copts.StatsHandler
+	if sh != nil {
+		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method})
+		begin := &stats.Begin{
+			Client:    true,
+			BeginTime: time.Now(),
+			FailFast:  c.failFast,
+		}
+		sh.HandleRPC(ctx, begin)
+	}
+	defer func() {
+		if err != nil && sh != nil {
+			// Only handle end stats if err != nil.
+			end := &stats.End{
+				Client: true,
+				Error:  err,
+			}
+			sh.HandleRPC(ctx, end)
+		}
+	}()
+	gopts := BalancerGetOptions{
+		BlockingWait: !c.failFast,
+	}
+	for {
+		t, put, err = cc.getTransport(ctx, gopts)
+		if err != nil {
+			// TODO(zhaoq): Probably revisit the error handling.
+			if _, ok := err.(*rpcError); ok {
+				return nil, err
+			}
+			if err == errConnClosing || err == errConnUnavailable {
+				if c.failFast {
+					return nil, Errorf(codes.Unavailable, "%v", err)
+				}
+				continue
+			}
+			// All the other errors are treated as Internal errors.
+			return nil, Errorf(codes.Internal, "%v", err)
+		}
+
+		s, err = t.NewStream(ctx, callHdr)
+		if err != nil {
+			if put != nil {
+				put()
+				put = nil
+			}
+			if _, ok := err.(transport.ConnectionError); ok || err == transport.ErrStreamDrain {
+				if c.failFast {
+					return nil, toRPCErr(err)
+				}
+				continue
+			}
+			return nil, toRPCErr(err)
+		}
+		break
+	}
+	cs := &clientStream{
+		opts:       opts,
+		c:          c,
+		desc:       desc,
+		codec:      cc.dopts.codec,
+		cp:         cc.dopts.cp,
+		dc:         cc.dopts.dc,
+		maxMsgSize: cc.dopts.maxMsgSize,
+		cancel:     cancel,
+
+		put: put,
+		t:   t,
+		s:   s,
+		p:   &parser{r: s},
+
+		tracing: EnableTracing,
+		trInfo:  trInfo,
+
+		statsCtx:     ctx,
+		statsHandler: cc.dopts.copts.StatsHandler,
+	}
+	if cc.dopts.cp != nil {
+		cs.cbuf = new(bytes.Buffer)
+	}
+	// Listen on ctx.Done() to detect cancellation and s.Done() to detect normal termination
+	// when there is no pending I/O operations on this stream.
+	go func() {
+		select {
+		case <-t.Error():
+			// Incur transport error, simply exit.
+		case <-s.Done():
+			// TODO: The trace of the RPC is terminated here when there is no pending
+			// I/O, which is probably not the optimal solution.
+			if s.StatusCode() == codes.OK {
+				cs.finish(nil)
+			} else {
+				cs.finish(Errorf(s.StatusCode(), "%s", s.StatusDesc()))
+			}
+			cs.closeTransportStream(nil)
+		case <-s.GoAway():
+			cs.finish(errConnDrain)
+			cs.closeTransportStream(errConnDrain)
+		case <-s.Context().Done():
+			err := s.Context().Err()
+			cs.finish(err)
+			cs.closeTransportStream(transport.ContextErr(err))
+		}
+	}()
+	return cs, nil
+}
+
+// clientStream implements a client side Stream.
+type clientStream struct {
+	opts       []CallOption
+	c          callInfo
+	t          transport.ClientTransport
+	s          *transport.Stream
+	p          *parser
+	desc       *StreamDesc
+	codec      Codec
+	cp         Compressor
+	cbuf       *bytes.Buffer
+	dc         Decompressor
+	maxMsgSize int
+	cancel     context.CancelFunc
+
+	tracing bool // set to EnableTracing when the clientStream is created.
+
+	mu     sync.Mutex
+	put    func()
+	closed bool
+	// trInfo.tr is set when the clientStream is created (if EnableTracing is true),
+	// and is set to nil when the clientStream's finish method is called.
+	trInfo traceInfo
+
+	// statsCtx keeps the user context for stats handling.
+	// All stats collection should use the statsCtx (instead of the stream context)
+	// so that all the generated stats for a particular RPC can be associated in the processing phase.
+	statsCtx     context.Context
+	statsHandler stats.Handler
+}
+
+func (cs *clientStream) Context() context.Context {
+	return cs.s.Context()
+}
+
+func (cs *clientStream) Header() (metadata.MD, error) {
+	m, err := cs.s.Header()
+	if err != nil {
+		if _, ok := err.(transport.ConnectionError); !ok {
+			cs.closeTransportStream(err)
+		}
+	}
+	return m, err
+}
+
+func (cs *clientStream) Trailer() metadata.MD {
+	return cs.s.Trailer()
+}
+
+func (cs *clientStream) SendMsg(m interface{}) (err error) {
+	if cs.tracing {
+		cs.mu.Lock()
+		if cs.trInfo.tr != nil {
+			cs.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true)
+		}
+		cs.mu.Unlock()
+	}
+	// TODO Investigate how to signal the stats handling party.
+	// generate error stats if err != nil && err != io.EOF?
+	defer func() {
+		if err != nil {
+			cs.finish(err)
+		}
+		if err == nil {
+			return
+		}
+		if err == io.EOF {
+			// Specialize the process for server streaming. SendMesg is only called
+			// once when creating the stream object. io.EOF needs to be skipped when
+			// the rpc is early finished (before the stream object is created.).
+			// TODO: It is probably better to move this into the generated code.
+			if !cs.desc.ClientStreams && cs.desc.ServerStreams {
+				err = nil
+			}
+			return
+		}
+		if _, ok := err.(transport.ConnectionError); !ok {
+			cs.closeTransportStream(err)
+		}
+		err = toRPCErr(err)
+	}()
+	var outPayload *stats.OutPayload
+	if cs.statsHandler != nil {
+		outPayload = &stats.OutPayload{
+			Client: true,
+		}
+	}
+	out, err := encode(cs.codec, m, cs.cp, cs.cbuf, outPayload)
+	defer func() {
+		if cs.cbuf != nil {
+			cs.cbuf.Reset()
+		}
+	}()
+	if err != nil {
+		return Errorf(codes.Internal, "grpc: %v", err)
+	}
+	err = cs.t.Write(cs.s, out, &transport.Options{Last: false})
+	if err == nil && outPayload != nil {
+		outPayload.SentTime = time.Now()
+		cs.statsHandler.HandleRPC(cs.statsCtx, outPayload)
+	}
+	return err
+}
+
+func (cs *clientStream) RecvMsg(m interface{}) (err error) {
+	defer func() {
+		if err != nil && cs.statsHandler != nil {
+			// Only generate End if err != nil.
+			// If err == nil, it's not the last RecvMsg.
+			// The last RecvMsg gets either an RPC error or io.EOF.
+			end := &stats.End{
+				Client:  true,
+				EndTime: time.Now(),
+			}
+			if err != io.EOF {
+				end.Error = toRPCErr(err)
+			}
+			cs.statsHandler.HandleRPC(cs.statsCtx, end)
+		}
+	}()
+	var inPayload *stats.InPayload
+	if cs.statsHandler != nil {
+		inPayload = &stats.InPayload{
+			Client: true,
+		}
+	}
+	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, inPayload)
+	defer func() {
+		// err != nil indicates the termination of the stream.
+		if err != nil {
+			cs.finish(err)
+		}
+	}()
+	if err == nil {
+		if cs.tracing {
+			cs.mu.Lock()
+			if cs.trInfo.tr != nil {
+				cs.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true)
+			}
+			cs.mu.Unlock()
+		}
+		if inPayload != nil {
+			cs.statsHandler.HandleRPC(cs.statsCtx, inPayload)
+		}
+		if !cs.desc.ClientStreams || cs.desc.ServerStreams {
+			return
+		}
+		// Special handling for client streaming rpc.
+		// This recv expects EOF or errors, so we don't collect inPayload.
+		err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, nil)
+		cs.closeTransportStream(err)
+		if err == nil {
+			return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
+		}
+		if err == io.EOF {
+			if cs.s.StatusCode() == codes.OK {
+				cs.finish(err)
+				return nil
+			}
+			return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
+		}
+		return toRPCErr(err)
+	}
+	if _, ok := err.(transport.ConnectionError); !ok {
+		cs.closeTransportStream(err)
+	}
+	if err == io.EOF {
+		if cs.s.StatusCode() == codes.OK {
+			// Returns io.EOF to indicate the end of the stream.
+			return
+		}
+		return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
+	}
+	return toRPCErr(err)
+}
+
+func (cs *clientStream) CloseSend() (err error) {
+	err = cs.t.Write(cs.s, nil, &transport.Options{Last: true})
+	defer func() {
+		if err != nil {
+			cs.finish(err)
+		}
+	}()
+	if err == nil || err == io.EOF {
+		return nil
+	}
+	if _, ok := err.(transport.ConnectionError); !ok {
+		cs.closeTransportStream(err)
+	}
+	err = toRPCErr(err)
+	return
+}
+
+func (cs *clientStream) closeTransportStream(err error) {
+	cs.mu.Lock()
+	if cs.closed {
+		cs.mu.Unlock()
+		return
+	}
+	cs.closed = true
+	cs.mu.Unlock()
+	cs.t.CloseStream(cs.s, err)
+}
+
+func (cs *clientStream) finish(err error) {
+	defer func() {
+		if cs.cancel != nil {
+			cs.cancel()
+		}
+	}()
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	for _, o := range cs.opts {
+		o.after(&cs.c)
+	}
+	if cs.put != nil {
+		cs.put()
+		cs.put = nil
+	}
+	if !cs.tracing {
+		return
+	}
+	if cs.trInfo.tr != nil {
+		if err == nil || err == io.EOF {
+			cs.trInfo.tr.LazyPrintf("RPC: [OK]")
+		} else {
+			cs.trInfo.tr.LazyPrintf("RPC: [%v]", err)
+			cs.trInfo.tr.SetError()
+		}
+		cs.trInfo.tr.Finish()
+		cs.trInfo.tr = nil
+	}
+}
+
+// ServerStream defines the interface a server stream has to satisfy.
+type ServerStream interface {
+	// SetHeader sets the header metadata. It may be called multiple times.
+	// When call multiple times, all the provided metadata will be merged.
+	// All the metadata will be sent out when one of the following happens:
+	//  - ServerStream.SendHeader() is called;
+	//  - The first response is sent out;
+	//  - An RPC status is sent out (error or success).
+	SetHeader(metadata.MD) error
+	// SendHeader sends the header metadata.
+	// The provided md and headers set by SetHeader() will be sent.
+	// It fails if called multiple times.
+	SendHeader(metadata.MD) error
+	// SetTrailer sets the trailer metadata which will be sent with the RPC status.
+	// When called more than once, all the provided metadata will be merged.
+	SetTrailer(metadata.MD)
+	Stream
+}
+
+// serverStream implements a server side Stream.
+type serverStream struct {
+	t          transport.ServerTransport
+	s          *transport.Stream
+	p          *parser
+	codec      Codec
+	cp         Compressor
+	dc         Decompressor
+	cbuf       *bytes.Buffer
+	maxMsgSize int
+	statusCode codes.Code
+	statusDesc string
+	trInfo     *traceInfo
+
+	statsHandler stats.Handler
+
+	mu sync.Mutex // protects trInfo.tr after the service handler runs.
+}
+
+func (ss *serverStream) Context() context.Context {
+	return ss.s.Context()
+}
+
+func (ss *serverStream) SetHeader(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+	return ss.s.SetHeader(md)
+}
+
+func (ss *serverStream) SendHeader(md metadata.MD) error {
+	return ss.t.WriteHeader(ss.s, md)
+}
+
+func (ss *serverStream) SetTrailer(md metadata.MD) {
+	if md.Len() == 0 {
+		return
+	}
+	ss.s.SetTrailer(md)
+	return
+}
+
+func (ss *serverStream) SendMsg(m interface{}) (err error) {
+	defer func() {
+		if ss.trInfo != nil {
+			ss.mu.Lock()
+			if ss.trInfo.tr != nil {
+				if err == nil {
+					ss.trInfo.tr.LazyLog(&payload{sent: true, msg: m}, true)
+				} else {
+					ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+					ss.trInfo.tr.SetError()
+				}
+			}
+			ss.mu.Unlock()
+		}
+	}()
+	var outPayload *stats.OutPayload
+	if ss.statsHandler != nil {
+		outPayload = &stats.OutPayload{}
+	}
+	out, err := encode(ss.codec, m, ss.cp, ss.cbuf, outPayload)
+	defer func() {
+		if ss.cbuf != nil {
+			ss.cbuf.Reset()
+		}
+	}()
+	if err != nil {
+		err = Errorf(codes.Internal, "grpc: %v", err)
+		return err
+	}
+	if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil {
+		return toRPCErr(err)
+	}
+	if outPayload != nil {
+		outPayload.SentTime = time.Now()
+		ss.statsHandler.HandleRPC(ss.s.Context(), outPayload)
+	}
+	return nil
+}
+
+func (ss *serverStream) RecvMsg(m interface{}) (err error) {
+	defer func() {
+		if ss.trInfo != nil {
+			ss.mu.Lock()
+			if ss.trInfo.tr != nil {
+				if err == nil {
+					ss.trInfo.tr.LazyLog(&payload{sent: false, msg: m}, true)
+				} else if err != io.EOF {
+					ss.trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
+					ss.trInfo.tr.SetError()
+				}
+			}
+			ss.mu.Unlock()
+		}
+	}()
+	var inPayload *stats.InPayload
+	if ss.statsHandler != nil {
+		inPayload = &stats.InPayload{}
+	}
+	if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize, inPayload); err != nil {
+		if err == io.EOF {
+			return err
+		}
+		if err == io.ErrUnexpectedEOF {
+			err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
+		}
+		return toRPCErr(err)
+	}
+	if inPayload != nil {
+		ss.statsHandler.HandleRPC(ss.s.Context(), inPayload)
+	}
+	return nil
+}
diff --git a/vendor/google.golang.org/grpc/stress/client/main.go b/vendor/google.golang.org/grpc/stress/client/main.go
new file mode 100644
index 00000000000..dff85ffec29
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/client/main.go
@@ -0,0 +1,347 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// client starts an interop client to do stress test and a metrics server to report qps.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"math/rand"
+	"net"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/interop"
+	testpb "google.golang.org/grpc/interop/grpc_testing"
+	metricspb "google.golang.org/grpc/stress/grpc_testing"
+)
+
+var (
+	serverAddresses      = flag.String("server_addresses", "localhost:8080", "a list of server addresses")
+	testCases            = flag.String("test_cases", "", "a list of test cases along with the relative weights")
+	testDurationSecs     = flag.Int("test_duration_secs", -1, "test duration in seconds")
+	numChannelsPerServer = flag.Int("num_channels_per_server", 1, "Number of channels (i.e connections) to each server")
+	numStubsPerChannel   = flag.Int("num_stubs_per_channel", 1, "Number of client stubs per each connection to server")
+	metricsPort          = flag.Int("metrics_port", 8081, "The port at which the stress client exposes QPS metrics")
+	useTLS               = flag.Bool("use_tls", false, "Connection uses TLS if true, else plain TCP")
+	testCA               = flag.Bool("use_test_ca", false, "Whether to replace platform root CAs with test CA as the CA root")
+	tlsServerName        = flag.String("server_host_override", "foo.test.google.fr", "The server name use to verify the hostname returned by TLS handshake if it is not empty. Otherwise, --server_host is used.")
+
+	// The test CA root cert file
+	testCAFile = "testdata/ca.pem"
+)
+
+// testCaseWithWeight contains the test case type and its weight.
+type testCaseWithWeight struct {
+	name   string
+	weight int
+}
+
+// parseTestCases converts test case string to a list of struct testCaseWithWeight.
+func parseTestCases(testCaseString string) []testCaseWithWeight {
+	testCaseStrings := strings.Split(testCaseString, ",")
+	testCases := make([]testCaseWithWeight, len(testCaseStrings))
+	for i, str := range testCaseStrings {
+		testCase := strings.Split(str, ":")
+		if len(testCase) != 2 {
+			panic(fmt.Sprintf("invalid test case with weight: %s", str))
+		}
+		// Check if test case is supported.
+		switch testCase[0] {
+		case
+			"empty_unary",
+			"large_unary",
+			"client_streaming",
+			"server_streaming",
+			"ping_pong",
+			"empty_stream",
+			"timeout_on_sleeping_server",
+			"cancel_after_begin",
+			"cancel_after_first_response",
+			"status_code_and_message",
+			"custom_metadata":
+		default:
+			panic(fmt.Sprintf("unknown test type: %s", testCase[0]))
+		}
+		testCases[i].name = testCase[0]
+		w, err := strconv.Atoi(testCase[1])
+		if err != nil {
+			panic(fmt.Sprintf("%v", err))
+		}
+		testCases[i].weight = w
+	}
+	return testCases
+}
+
+// weightedRandomTestSelector defines a weighted random selector for test case types.
+type weightedRandomTestSelector struct {
+	tests       []testCaseWithWeight
+	totalWeight int
+}
+
+// newWeightedRandomTestSelector constructs a weightedRandomTestSelector with the given list of testCaseWithWeight.
+func newWeightedRandomTestSelector(tests []testCaseWithWeight) *weightedRandomTestSelector {
+	var totalWeight int
+	for _, t := range tests {
+		totalWeight += t.weight
+	}
+	rand.Seed(time.Now().UnixNano())
+	return &weightedRandomTestSelector{tests, totalWeight}
+}
+
+func (selector weightedRandomTestSelector) getNextTest() string {
+	random := rand.Intn(selector.totalWeight)
+	var weightSofar int
+	for _, test := range selector.tests {
+		weightSofar += test.weight
+		if random < weightSofar {
+			return test.name
+		}
+	}
+	panic("no test case selected by weightedRandomTestSelector")
+}
+
+// gauge stores the qps of one interop client (one stub).
+type gauge struct {
+	mutex sync.RWMutex
+	val   int64
+}
+
+func (g *gauge) set(v int64) {
+	g.mutex.Lock()
+	defer g.mutex.Unlock()
+	g.val = v
+}
+
+func (g *gauge) get() int64 {
+	g.mutex.RLock()
+	defer g.mutex.RUnlock()
+	return g.val
+}
+
+// server implements metrics server functions.
+type server struct {
+	mutex sync.RWMutex
+	// gauges is a map from /stress_test/server_<n>/channel_<n>/stub_<n>/qps to its qps gauge.
+	gauges map[string]*gauge
+}
+
+// newMetricsServer returns a new metrics server.
+func newMetricsServer() *server {
+	return &server{gauges: make(map[string]*gauge)}
+}
+
+// GetAllGauges returns all gauges.
+func (s *server) GetAllGauges(in *metricspb.EmptyMessage, stream metricspb.MetricsService_GetAllGaugesServer) error {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+
+	for name, gauge := range s.gauges {
+		if err := stream.Send(&metricspb.GaugeResponse{Name: name, Value: &metricspb.GaugeResponse_LongValue{LongValue: gauge.get()}}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetGauge returns the gauge for the given name.
+func (s *server) GetGauge(ctx context.Context, in *metricspb.GaugeRequest) (*metricspb.GaugeResponse, error) {
+	s.mutex.RLock()
+	defer s.mutex.RUnlock()
+
+	if g, ok := s.gauges[in.Name]; ok {
+		return &metricspb.GaugeResponse{Name: in.Name, Value: &metricspb.GaugeResponse_LongValue{LongValue: g.get()}}, nil
+	}
+	return nil, grpc.Errorf(codes.InvalidArgument, "gauge with name %s not found", in.Name)
+}
+
+// createGauge creates a gauge using the given name in metrics server.
+func (s *server) createGauge(name string) *gauge {
+	s.mutex.Lock()
+	defer s.mutex.Unlock()
+
+	if _, ok := s.gauges[name]; ok {
+		// gauge already exists.
+		panic(fmt.Sprintf("gauge %s already exists", name))
+	}
+	var g gauge
+	s.gauges[name] = &g
+	return &g
+}
+
+func startServer(server *server, port int) {
+	lis, err := net.Listen("tcp", ":"+strconv.Itoa(port))
+	if err != nil {
+		grpclog.Fatalf("failed to listen: %v", err)
+	}
+
+	s := grpc.NewServer()
+	metricspb.RegisterMetricsServiceServer(s, server)
+	s.Serve(lis)
+
+}
+
+// performRPCs uses weightedRandomTestSelector to select test case and runs the tests.
+func performRPCs(gauge *gauge, conn *grpc.ClientConn, selector *weightedRandomTestSelector, stop <-chan bool) {
+	client := testpb.NewTestServiceClient(conn)
+	var numCalls int64
+	startTime := time.Now()
+	for {
+		test := selector.getNextTest()
+		switch test {
+		case "empty_unary":
+			interop.DoEmptyUnaryCall(client, grpc.FailFast(false))
+		case "large_unary":
+			interop.DoLargeUnaryCall(client, grpc.FailFast(false))
+		case "client_streaming":
+			interop.DoClientStreaming(client, grpc.FailFast(false))
+		case "server_streaming":
+			interop.DoServerStreaming(client, grpc.FailFast(false))
+		case "ping_pong":
+			interop.DoPingPong(client, grpc.FailFast(false))
+		case "empty_stream":
+			interop.DoEmptyStream(client, grpc.FailFast(false))
+		case "timeout_on_sleeping_server":
+			interop.DoTimeoutOnSleepingServer(client, grpc.FailFast(false))
+		case "cancel_after_begin":
+			interop.DoCancelAfterBegin(client, grpc.FailFast(false))
+		case "cancel_after_first_response":
+			interop.DoCancelAfterFirstResponse(client, grpc.FailFast(false))
+		case "status_code_and_message":
+			interop.DoStatusCodeAndMessage(client, grpc.FailFast(false))
+		case "custom_metadata":
+			interop.DoCustomMetadata(client, grpc.FailFast(false))
+		}
+		numCalls++
+		gauge.set(int64(float64(numCalls) / time.Since(startTime).Seconds()))
+
+		select {
+		case <-stop:
+			return
+		default:
+		}
+	}
+}
+
+func logParameterInfo(addresses []string, tests []testCaseWithWeight) {
+	grpclog.Printf("server_addresses: %s", *serverAddresses)
+	grpclog.Printf("test_cases: %s", *testCases)
+	grpclog.Printf("test_duration_secs: %d", *testDurationSecs)
+	grpclog.Printf("num_channels_per_server: %d", *numChannelsPerServer)
+	grpclog.Printf("num_stubs_per_channel: %d", *numStubsPerChannel)
+	grpclog.Printf("metrics_port: %d", *metricsPort)
+	grpclog.Printf("use_tls: %t", *useTLS)
+	grpclog.Printf("use_test_ca: %t", *testCA)
+	grpclog.Printf("server_host_override: %s", *tlsServerName)
+
+	grpclog.Println("addresses:")
+	for i, addr := range addresses {
+		grpclog.Printf("%d. %s\n", i+1, addr)
+	}
+	grpclog.Println("tests:")
+	for i, test := range tests {
+		grpclog.Printf("%d. %v\n", i+1, test)
+	}
+}
+
+func newConn(address string, useTLS, testCA bool, tlsServerName string) (*grpc.ClientConn, error) {
+	var opts []grpc.DialOption
+	if useTLS {
+		var sn string
+		if tlsServerName != "" {
+			sn = tlsServerName
+		}
+		var creds credentials.TransportCredentials
+		if testCA {
+			var err error
+			creds, err = credentials.NewClientTLSFromFile(testCAFile, sn)
+			if err != nil {
+				grpclog.Fatalf("Failed to create TLS credentials %v", err)
+			}
+		} else {
+			creds = credentials.NewClientTLSFromCert(nil, sn)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+	return grpc.Dial(address, opts...)
+}
+
+func main() {
+	flag.Parse()
+	addresses := strings.Split(*serverAddresses, ",")
+	tests := parseTestCases(*testCases)
+	logParameterInfo(addresses, tests)
+	testSelector := newWeightedRandomTestSelector(tests)
+	metricsServer := newMetricsServer()
+
+	var wg sync.WaitGroup
+	wg.Add(len(addresses) * *numChannelsPerServer * *numStubsPerChannel)
+	stop := make(chan bool)
+
+	for serverIndex, address := range addresses {
+		for connIndex := 0; connIndex < *numChannelsPerServer; connIndex++ {
+			conn, err := newConn(address, *useTLS, *testCA, *tlsServerName)
+			if err != nil {
+				grpclog.Fatalf("Fail to dial: %v", err)
+			}
+			defer conn.Close()
+			for clientIndex := 0; clientIndex < *numStubsPerChannel; clientIndex++ {
+				name := fmt.Sprintf("/stress_test/server_%d/channel_%d/stub_%d/qps", serverIndex+1, connIndex+1, clientIndex+1)
+				go func() {
+					defer wg.Done()
+					g := metricsServer.createGauge(name)
+					performRPCs(g, conn, testSelector, stop)
+				}()
+			}
+
+		}
+	}
+	go startServer(metricsServer, *metricsPort)
+	if *testDurationSecs > 0 {
+		time.Sleep(time.Duration(*testDurationSecs) * time.Second)
+		close(stop)
+	}
+	wg.Wait()
+	grpclog.Printf(" ===== ALL DONE ===== ")
+
+}
diff --git a/vendor/google.golang.org/grpc/stress/client/testdata/ca.pem b/vendor/google.golang.org/grpc/stress/client/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/client/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----
+MIICSjCCAbOgAwIBAgIJAJHGGR4dGioHMA0GCSqGSIb3DQEBCwUAMFYxCzAJBgNV
+BAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBX
+aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMTBnRlc3RjYTAeFw0xNDExMTEyMjMxMjla
+Fw0yNDExMDgyMjMxMjlaMFYxCzAJBgNVBAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0
+YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMT
+BnRlc3RjYTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAwEDfBV5MYdlHVHJ7
++L4nxrZy7mBfAVXpOc5vMYztssUI7mL2/iYujiIXM+weZYNTEpLdjyJdu7R5gGUu
+g1jSVK/EPHfc74O7AyZU34PNIP4Sh33N+/A5YexrNgJlPY+E3GdVYi4ldWJjgkAd
+Qah2PH5ACLrIIC6tRka9hcaBlIECAwEAAaMgMB4wDAYDVR0TBAUwAwEB/zAOBgNV
+HQ8BAf8EBAMCAgQwDQYJKoZIhvcNAQELBQADgYEAHzC7jdYlzAVmddi/gdAeKPau
+sPBG/C2HCWqHzpCUHcKuvMzDVkY/MP2o6JIW2DBbY64bO/FceExhjcykgaYtCH/m
+oIU63+CFOTtR7otyQAWHqXa7q4SbCDlG7DyRFxqG0txPtGvy12lgldA2+RgcigQG
+Dfcog5wrJytaQ6UA0wE=
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/stress/client/testdata/server1.key b/vendor/google.golang.org/grpc/stress/client/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/client/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/stress/client/testdata/server1.pem b/vendor/google.golang.org/grpc/stress/client/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/client/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.pb.go b/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.pb.go
new file mode 100644
index 00000000000..a1310b5f585
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.pb.go
@@ -0,0 +1,361 @@
+// Code generated by protoc-gen-go.
+// source: metrics.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	metrics.proto
+
+It has these top-level messages:
+	GaugeResponse
+	GaugeRequest
+	EmptyMessage
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// Reponse message containing the gauge name and value
+type GaugeResponse struct {
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Types that are valid to be assigned to Value:
+	//	*GaugeResponse_LongValue
+	//	*GaugeResponse_DoubleValue
+	//	*GaugeResponse_StringValue
+	Value isGaugeResponse_Value `protobuf_oneof:"value"`
+}
+
+func (m *GaugeResponse) Reset()                    { *m = GaugeResponse{} }
+func (m *GaugeResponse) String() string            { return proto.CompactTextString(m) }
+func (*GaugeResponse) ProtoMessage()               {}
+func (*GaugeResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type isGaugeResponse_Value interface {
+	isGaugeResponse_Value()
+}
+
+type GaugeResponse_LongValue struct {
+	LongValue int64 `protobuf:"varint,2,opt,name=long_value,json=longValue,oneof"`
+}
+type GaugeResponse_DoubleValue struct {
+	DoubleValue float64 `protobuf:"fixed64,3,opt,name=double_value,json=doubleValue,oneof"`
+}
+type GaugeResponse_StringValue struct {
+	StringValue string `protobuf:"bytes,4,opt,name=string_value,json=stringValue,oneof"`
+}
+
+func (*GaugeResponse_LongValue) isGaugeResponse_Value()   {}
+func (*GaugeResponse_DoubleValue) isGaugeResponse_Value() {}
+func (*GaugeResponse_StringValue) isGaugeResponse_Value() {}
+
+func (m *GaugeResponse) GetValue() isGaugeResponse_Value {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (m *GaugeResponse) GetLongValue() int64 {
+	if x, ok := m.GetValue().(*GaugeResponse_LongValue); ok {
+		return x.LongValue
+	}
+	return 0
+}
+
+func (m *GaugeResponse) GetDoubleValue() float64 {
+	if x, ok := m.GetValue().(*GaugeResponse_DoubleValue); ok {
+		return x.DoubleValue
+	}
+	return 0
+}
+
+func (m *GaugeResponse) GetStringValue() string {
+	if x, ok := m.GetValue().(*GaugeResponse_StringValue); ok {
+		return x.StringValue
+	}
+	return ""
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*GaugeResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _GaugeResponse_OneofMarshaler, _GaugeResponse_OneofUnmarshaler, _GaugeResponse_OneofSizer, []interface{}{
+		(*GaugeResponse_LongValue)(nil),
+		(*GaugeResponse_DoubleValue)(nil),
+		(*GaugeResponse_StringValue)(nil),
+	}
+}
+
+func _GaugeResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*GaugeResponse)
+	// value
+	switch x := m.Value.(type) {
+	case *GaugeResponse_LongValue:
+		b.EncodeVarint(2<<3 | proto.WireVarint)
+		b.EncodeVarint(uint64(x.LongValue))
+	case *GaugeResponse_DoubleValue:
+		b.EncodeVarint(3<<3 | proto.WireFixed64)
+		b.EncodeFixed64(math.Float64bits(x.DoubleValue))
+	case *GaugeResponse_StringValue:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.StringValue)
+	case nil:
+	default:
+		return fmt.Errorf("GaugeResponse.Value has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _GaugeResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*GaugeResponse)
+	switch tag {
+	case 2: // value.long_value
+		if wire != proto.WireVarint {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeVarint()
+		m.Value = &GaugeResponse_LongValue{int64(x)}
+		return true, err
+	case 3: // value.double_value
+		if wire != proto.WireFixed64 {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeFixed64()
+		m.Value = &GaugeResponse_DoubleValue{math.Float64frombits(x)}
+		return true, err
+	case 4: // value.string_value
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.Value = &GaugeResponse_StringValue{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _GaugeResponse_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*GaugeResponse)
+	// value
+	switch x := m.Value.(type) {
+	case *GaugeResponse_LongValue:
+		n += proto.SizeVarint(2<<3 | proto.WireVarint)
+		n += proto.SizeVarint(uint64(x.LongValue))
+	case *GaugeResponse_DoubleValue:
+		n += proto.SizeVarint(3<<3 | proto.WireFixed64)
+		n += 8
+	case *GaugeResponse_StringValue:
+		n += proto.SizeVarint(4<<3 | proto.WireBytes)
+		n += proto.SizeVarint(uint64(len(x.StringValue)))
+		n += len(x.StringValue)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// Request message containing the gauge name
+type GaugeRequest struct {
+	Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+}
+
+func (m *GaugeRequest) Reset()                    { *m = GaugeRequest{} }
+func (m *GaugeRequest) String() string            { return proto.CompactTextString(m) }
+func (*GaugeRequest) ProtoMessage()               {}
+func (*GaugeRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+type EmptyMessage struct {
+}
+
+func (m *EmptyMessage) Reset()                    { *m = EmptyMessage{} }
+func (m *EmptyMessage) String() string            { return proto.CompactTextString(m) }
+func (*EmptyMessage) ProtoMessage()               {}
+func (*EmptyMessage) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func init() {
+	proto.RegisterType((*GaugeResponse)(nil), "grpc.testing.GaugeResponse")
+	proto.RegisterType((*GaugeRequest)(nil), "grpc.testing.GaugeRequest")
+	proto.RegisterType((*EmptyMessage)(nil), "grpc.testing.EmptyMessage")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for MetricsService service
+
+type MetricsServiceClient interface {
+	// Returns the values of all the gauges that are currently being maintained by
+	// the service
+	GetAllGauges(ctx context.Context, in *EmptyMessage, opts ...grpc.CallOption) (MetricsService_GetAllGaugesClient, error)
+	// Returns the value of one gauge
+	GetGauge(ctx context.Context, in *GaugeRequest, opts ...grpc.CallOption) (*GaugeResponse, error)
+}
+
+type metricsServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewMetricsServiceClient(cc *grpc.ClientConn) MetricsServiceClient {
+	return &metricsServiceClient{cc}
+}
+
+func (c *metricsServiceClient) GetAllGauges(ctx context.Context, in *EmptyMessage, opts ...grpc.CallOption) (MetricsService_GetAllGaugesClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_MetricsService_serviceDesc.Streams[0], c.cc, "/grpc.testing.MetricsService/GetAllGauges", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &metricsServiceGetAllGaugesClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type MetricsService_GetAllGaugesClient interface {
+	Recv() (*GaugeResponse, error)
+	grpc.ClientStream
+}
+
+type metricsServiceGetAllGaugesClient struct {
+	grpc.ClientStream
+}
+
+func (x *metricsServiceGetAllGaugesClient) Recv() (*GaugeResponse, error) {
+	m := new(GaugeResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *metricsServiceClient) GetGauge(ctx context.Context, in *GaugeRequest, opts ...grpc.CallOption) (*GaugeResponse, error) {
+	out := new(GaugeResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.MetricsService/GetGauge", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for MetricsService service
+
+type MetricsServiceServer interface {
+	// Returns the values of all the gauges that are currently being maintained by
+	// the service
+	GetAllGauges(*EmptyMessage, MetricsService_GetAllGaugesServer) error
+	// Returns the value of one gauge
+	GetGauge(context.Context, *GaugeRequest) (*GaugeResponse, error)
+}
+
+func RegisterMetricsServiceServer(s *grpc.Server, srv MetricsServiceServer) {
+	s.RegisterService(&_MetricsService_serviceDesc, srv)
+}
+
+func _MetricsService_GetAllGauges_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(EmptyMessage)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(MetricsServiceServer).GetAllGauges(m, &metricsServiceGetAllGaugesServer{stream})
+}
+
+type MetricsService_GetAllGaugesServer interface {
+	Send(*GaugeResponse) error
+	grpc.ServerStream
+}
+
+type metricsServiceGetAllGaugesServer struct {
+	grpc.ServerStream
+}
+
+func (x *metricsServiceGetAllGaugesServer) Send(m *GaugeResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _MetricsService_GetGauge_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GaugeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MetricsServiceServer).GetGauge(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.MetricsService/GetGauge",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MetricsServiceServer).GetGauge(ctx, req.(*GaugeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _MetricsService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.MetricsService",
+	HandlerType: (*MetricsServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "GetGauge",
+			Handler:    _MetricsService_GetGauge_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "GetAllGauges",
+			Handler:       _MetricsService_GetAllGauges_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "metrics.proto",
+}
+
+func init() { proto.RegisterFile("metrics.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 253 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0xcd, 0x4d, 0x2d, 0x29,
+	0xca, 0x4c, 0x2e, 0xd6, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x49, 0x2f, 0x2a, 0x48, 0xd6,
+	0x2b, 0x49, 0x2d, 0x2e, 0xc9, 0xcc, 0x4b, 0x57, 0x9a, 0xce, 0xc8, 0xc5, 0xeb, 0x9e, 0x58, 0x9a,
+	0x9e, 0x1a, 0x94, 0x5a, 0x5c, 0x90, 0x9f, 0x57, 0x9c, 0x2a, 0x24, 0xc4, 0xc5, 0x92, 0x97, 0x98,
+	0x9b, 0x2a, 0xc1, 0xa8, 0xc0, 0xa8, 0xc1, 0x19, 0x04, 0x66, 0x0b, 0xc9, 0x73, 0x71, 0xe5, 0xe4,
+	0xe7, 0xa5, 0xc7, 0x97, 0x25, 0xe6, 0x94, 0xa6, 0x4a, 0x30, 0x01, 0x65, 0x98, 0x3d, 0x18, 0x82,
+	0x38, 0x41, 0x62, 0x61, 0x20, 0x21, 0x21, 0x65, 0x2e, 0x9e, 0x94, 0xfc, 0xd2, 0xa4, 0x9c, 0x54,
+	0xa8, 0x12, 0x66, 0xa0, 0x12, 0x46, 0xa0, 0x12, 0x6e, 0x88, 0x28, 0x5c, 0x51, 0x31, 0xd0, 0x25,
+	0x70, 0x73, 0x58, 0x40, 0x36, 0x80, 0x14, 0x41, 0x44, 0xc1, 0x8a, 0x9c, 0xd8, 0xb9, 0x58, 0xc1,
+	0xb2, 0x4a, 0x4a, 0x5c, 0x3c, 0x50, 0x87, 0x15, 0x96, 0x02, 0x1d, 0x8b, 0xcd, 0x5d, 0x4a, 0x7c,
+	0x5c, 0x3c, 0xae, 0xb9, 0x05, 0x25, 0x95, 0xbe, 0xa9, 0xc5, 0xc5, 0x89, 0xe9, 0xa9, 0x46, 0x0b,
+	0x18, 0xb9, 0xf8, 0x7c, 0x21, 0xbe, 0x0d, 0x4e, 0x2d, 0x2a, 0xcb, 0x4c, 0x4e, 0x15, 0xf2, 0x04,
+	0x1a, 0x93, 0x5a, 0xe2, 0x98, 0x93, 0x03, 0x36, 0xac, 0x58, 0x48, 0x4a, 0x0f, 0xd9, 0xff, 0x7a,
+	0xc8, 0xda, 0xa5, 0xa4, 0x51, 0xe5, 0x50, 0xc2, 0xc5, 0x80, 0x51, 0xc8, 0x99, 0x8b, 0x03, 0x68,
+	0x14, 0x58, 0x14, 0xdd, 0x18, 0x64, 0x97, 0xe2, 0x35, 0x26, 0x89, 0x0d, 0x1c, 0x0b, 0xc6, 0x80,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0x5e, 0x7d, 0xb2, 0xc9, 0x96, 0x01, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.proto b/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.proto
new file mode 100644
index 00000000000..1202b20b8fd
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/grpc_testing/metrics.proto
@@ -0,0 +1,64 @@
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Contains the definitions for a metrics service and the type of metrics
+// exposed by the service.
+//
+// Currently, 'Gauge' (i.e a metric that represents the measured value of
+// something at an instant of time) is the only metric type supported by the
+// service.
+syntax = "proto3";
+
+package grpc.testing;
+
+// Reponse message containing the gauge name and value
+message GaugeResponse {
+  string name = 1;
+  oneof value {
+    int64 long_value = 2;
+    double double_value = 3;
+    string string_value = 4;
+  }
+}
+
+// Request message containing the gauge name
+message GaugeRequest {
+  string name = 1;
+}
+
+message EmptyMessage {}
+
+service MetricsService {
+  // Returns the values of all the gauges that are currently being maintained by
+  // the service
+  rpc GetAllGauges(EmptyMessage) returns (stream GaugeResponse);
+
+  // Returns the value of one gauge
+  rpc GetGauge(GaugeRequest) returns (GaugeResponse);
+}
diff --git a/vendor/google.golang.org/grpc/stress/metrics_client/main.go b/vendor/google.golang.org/grpc/stress/metrics_client/main.go
new file mode 100644
index 00000000000..983a8ff24cc
--- /dev/null
+++ b/vendor/google.golang.org/grpc/stress/metrics_client/main.go
@@ -0,0 +1,97 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/grpclog"
+	metricspb "google.golang.org/grpc/stress/grpc_testing"
+)
+
+var (
+	metricsServerAddress = flag.String("metrics_server_address", "", "The metrics server addresses in the fomrat <hostname>:<port>")
+	totalOnly            = flag.Bool("total_only", false, "If true, this prints only the total value of all gauges")
+)
+
+func printMetrics(client metricspb.MetricsServiceClient, totalOnly bool) {
+	stream, err := client.GetAllGauges(context.Background(), &metricspb.EmptyMessage{})
+	if err != nil {
+		grpclog.Fatalf("failed to call GetAllGuages: %v", err)
+	}
+
+	var (
+		overallQPS int64
+		rpcStatus  error
+	)
+	for {
+		gaugeResponse, err := stream.Recv()
+		if err != nil {
+			rpcStatus = err
+			break
+		}
+		if _, ok := gaugeResponse.GetValue().(*metricspb.GaugeResponse_LongValue); !ok {
+			panic(fmt.Sprintf("gauge %s is not a long value", gaugeResponse.Name))
+		}
+		v := gaugeResponse.GetLongValue()
+		if !totalOnly {
+			grpclog.Printf("%s: %d", gaugeResponse.Name, v)
+		}
+		overallQPS += v
+	}
+	if rpcStatus != io.EOF {
+		grpclog.Fatalf("failed to finish server streaming: %v", rpcStatus)
+	}
+	grpclog.Printf("overall qps: %d", overallQPS)
+}
+
+func main() {
+	flag.Parse()
+	if *metricsServerAddress == "" {
+		grpclog.Fatalf("Metrics server address is empty.")
+	}
+
+	conn, err := grpc.Dial(*metricsServerAddress, grpc.WithInsecure())
+	if err != nil {
+		grpclog.Fatalf("cannot connect to metrics server: %v", err)
+	}
+	defer conn.Close()
+
+	c := metricspb.NewMetricsServiceClient(conn)
+	printMetrics(c, *totalOnly)
+}
diff --git a/vendor/google.golang.org/grpc/tap/tap.go b/vendor/google.golang.org/grpc/tap/tap.go
new file mode 100644
index 00000000000..0f366476742
--- /dev/null
+++ b/vendor/google.golang.org/grpc/tap/tap.go
@@ -0,0 +1,54 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// Package tap defines the function handles which are executed on the transport
+// layer of gRPC-Go and related information. Everything here is EXPERIMENTAL.
+package tap
+
+import (
+	"golang.org/x/net/context"
+)
+
+// Info defines the relevant information needed by the handles.
+type Info struct {
+	// FullMethodName is the string of grpc method (in the format of
+	// /package.service/method).
+	FullMethodName string
+	// TODO: More to be added.
+}
+
+// ServerInHandle defines the function which runs when a new stream is created
+// on the server side. Note that it is executed in the per-connection I/O goroutine(s) instead
+// of per-RPC goroutine. Therefore, users should NOT have any blocking/time-consuming
+// work in this handle. Otherwise all the RPCs would slow down.
+type ServerInHandle func(ctx context.Context, info *Info) (context.Context, error)
diff --git a/vendor/google.golang.org/grpc/test/codec_perf/perf.pb.go b/vendor/google.golang.org/grpc/test/codec_perf/perf.pb.go
new file mode 100644
index 00000000000..c88756edcc2
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/codec_perf/perf.pb.go
@@ -0,0 +1,63 @@
+// Code generated by protoc-gen-go.
+// source: perf.proto
+// DO NOT EDIT!
+
+/*
+Package codec_perf is a generated protocol buffer package.
+
+It is generated from these files:
+	perf.proto
+
+It has these top-level messages:
+	Buffer
+*/
+package codec_perf
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// Buffer is a message that contains a body of bytes that is used to exercise
+// encoding and decoding overheads.
+type Buffer struct {
+	Body             []byte `protobuf:"bytes,1,opt,name=body" json:"body,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Buffer) Reset()                    { *m = Buffer{} }
+func (m *Buffer) String() string            { return proto.CompactTextString(m) }
+func (*Buffer) ProtoMessage()               {}
+func (*Buffer) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *Buffer) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Buffer)(nil), "codec.perf.Buffer")
+}
+
+func init() { proto.RegisterFile("perf.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 73 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0x2a, 0x48, 0x2d, 0x4a,
+	0xd3, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x4a, 0xce, 0x4f, 0x49, 0x4d, 0xd6, 0x03, 0x89,
+	0x28, 0xc9, 0x70, 0xb1, 0x39, 0x95, 0xa6, 0xa5, 0xa5, 0x16, 0x09, 0x09, 0x71, 0xb1, 0x24, 0xe5,
+	0xa7, 0x54, 0x4a, 0x30, 0x2a, 0x30, 0x6a, 0xf0, 0x04, 0x81, 0xd9, 0x80, 0x00, 0x00, 0x00, 0xff,
+	0xff, 0x3a, 0x58, 0x92, 0x53, 0x36, 0x00, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/test/codec_perf/perf.proto b/vendor/google.golang.org/grpc/test/codec_perf/perf.proto
new file mode 100644
index 00000000000..4cf561f7f1e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/codec_perf/perf.proto
@@ -0,0 +1,11 @@
+// Messages used for performance tests that may not reference grpc directly for
+// reasons of import cycles.
+syntax = "proto2";
+
+package codec.perf;
+
+// Buffer is a message that contains a body of bytes that is used to exercise
+// encoding and decoding overheads.
+message Buffer {
+  optional bytes body = 1;
+}
diff --git a/vendor/google.golang.org/grpc/test/end2end_test.go b/vendor/google.golang.org/grpc/test/end2end_test.go
new file mode 100644
index 00000000000..98d590e9ea7
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/end2end_test.go
@@ -0,0 +1,3638 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc_test
+
+import (
+	"bytes"
+	"crypto/tls"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"math"
+	"net"
+	"os"
+	"reflect"
+	"runtime"
+	"sort"
+	"strings"
+	"sync"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/health"
+	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/tap"
+	testpb "google.golang.org/grpc/test/grpc_testing"
+)
+
+var (
+	// For headers:
+	testMetadata = metadata.MD{
+		"key1": []string{"value1"},
+		"key2": []string{"value2"},
+	}
+	testMetadata2 = metadata.MD{
+		"key1": []string{"value12"},
+		"key2": []string{"value22"},
+	}
+	// For trailers:
+	testTrailerMetadata = metadata.MD{
+		"tkey1": []string{"trailerValue1"},
+		"tkey2": []string{"trailerValue2"},
+	}
+	testTrailerMetadata2 = metadata.MD{
+		"tkey1": []string{"trailerValue12"},
+		"tkey2": []string{"trailerValue22"},
+	}
+	// capital "Key" is illegal in HTTP/2.
+	malformedHTTP2Metadata = metadata.MD{
+		"Key": []string{"foo"},
+	}
+	testAppUA = "myApp1/1.0 myApp2/0.9"
+)
+
+var raceMode bool // set by race_test.go in race mode
+
+type testServer struct {
+	security           string // indicate the authentication protocol used by this server.
+	earlyFail          bool   // whether to error out the execution of a service handler prematurely.
+	setAndSendHeader   bool   // whether to call setHeader and sendHeader.
+	setHeaderOnly      bool   // whether to only call setHeader, not sendHeader.
+	multipleSetTrailer bool   // whether to call setTrailer multiple times.
+}
+
+func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
+	if md, ok := metadata.FromContext(ctx); ok {
+		// For testing purpose, returns an error if there is attached metadata other than
+		// the user agent set by the client application.
+		if _, ok := md["user-agent"]; !ok {
+			return nil, grpc.Errorf(codes.DataLoss, "missing expected user-agent")
+		}
+		var str []string
+		for _, entry := range md["user-agent"] {
+			str = append(str, "ua", entry)
+		}
+		grpc.SendHeader(ctx, metadata.Pairs(str...))
+	}
+	return new(testpb.Empty), nil
+}
+
+func newPayload(t testpb.PayloadType, size int32) (*testpb.Payload, error) {
+	if size < 0 {
+		return nil, fmt.Errorf("Requested a response with invalid length %d", size)
+	}
+	body := make([]byte, size)
+	switch t {
+	case testpb.PayloadType_COMPRESSABLE:
+	case testpb.PayloadType_UNCOMPRESSABLE:
+		return nil, fmt.Errorf("PayloadType UNCOMPRESSABLE is not supported")
+	default:
+		return nil, fmt.Errorf("Unsupported payload type: %d", t)
+	}
+	return &testpb.Payload{
+		Type: t.Enum(),
+		Body: body,
+	}, nil
+}
+
+func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	md, ok := metadata.FromContext(ctx)
+	if ok {
+		if _, exists := md[":authority"]; !exists {
+			return nil, grpc.Errorf(codes.DataLoss, "expected an :authority metadata: %v", md)
+		}
+		if s.setAndSendHeader {
+			if err := grpc.SetHeader(ctx, md); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SetHeader(_, %v) = %v, want <nil>", md, err)
+			}
+			if err := grpc.SendHeader(ctx, testMetadata2); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SendHeader(_, %v) = %v, want <nil>", testMetadata2, err)
+			}
+		} else if s.setHeaderOnly {
+			if err := grpc.SetHeader(ctx, md); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SetHeader(_, %v) = %v, want <nil>", md, err)
+			}
+			if err := grpc.SetHeader(ctx, testMetadata2); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SetHeader(_, %v) = %v, want <nil>", testMetadata2, err)
+			}
+		} else {
+			if err := grpc.SendHeader(ctx, md); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SendHeader(_, %v) = %v, want <nil>", md, err)
+			}
+		}
+		if err := grpc.SetTrailer(ctx, testTrailerMetadata); err != nil {
+			return nil, grpc.Errorf(grpc.Code(err), "grpc.SetTrailer(_, %v) = %v, want <nil>", testTrailerMetadata, err)
+		}
+		if s.multipleSetTrailer {
+			if err := grpc.SetTrailer(ctx, testTrailerMetadata2); err != nil {
+				return nil, grpc.Errorf(grpc.Code(err), "grpc.SetTrailer(_, %v) = %v, want <nil>", testTrailerMetadata2, err)
+			}
+		}
+	}
+	pr, ok := peer.FromContext(ctx)
+	if !ok {
+		return nil, grpc.Errorf(codes.DataLoss, "failed to get peer from ctx")
+	}
+	if pr.Addr == net.Addr(nil) {
+		return nil, grpc.Errorf(codes.DataLoss, "failed to get peer address")
+	}
+	if s.security != "" {
+		// Check Auth info
+		var authType, serverName string
+		switch info := pr.AuthInfo.(type) {
+		case credentials.TLSInfo:
+			authType = info.AuthType()
+			serverName = info.State.ServerName
+		default:
+			return nil, grpc.Errorf(codes.Unauthenticated, "Unknown AuthInfo type")
+		}
+		if authType != s.security {
+			return nil, grpc.Errorf(codes.Unauthenticated, "Wrong auth type: got %q, want %q", authType, s.security)
+		}
+		if serverName != "x.test.youtube.com" {
+			return nil, grpc.Errorf(codes.Unauthenticated, "Unknown server name %q", serverName)
+		}
+	}
+	// Simulate some service delay.
+	time.Sleep(time.Second)
+
+	payload, err := newPayload(in.GetResponseType(), in.GetResponseSize())
+	if err != nil {
+		return nil, err
+	}
+
+	return &testpb.SimpleResponse{
+		Payload: payload,
+	}, nil
+}
+
+func (s *testServer) StreamingOutputCall(args *testpb.StreamingOutputCallRequest, stream testpb.TestService_StreamingOutputCallServer) error {
+	if md, ok := metadata.FromContext(stream.Context()); ok {
+		if _, exists := md[":authority"]; !exists {
+			return grpc.Errorf(codes.DataLoss, "expected an :authority metadata: %v", md)
+		}
+		// For testing purpose, returns an error if there is attached metadata except for authority.
+		if len(md) > 1 {
+			return grpc.Errorf(codes.DataLoss, "got extra metadata")
+		}
+	}
+	cs := args.GetResponseParameters()
+	for _, c := range cs {
+		if us := c.GetIntervalUs(); us > 0 {
+			time.Sleep(time.Duration(us) * time.Microsecond)
+		}
+
+		payload, err := newPayload(args.GetResponseType(), c.GetSize())
+		if err != nil {
+			return err
+		}
+
+		if err := stream.Send(&testpb.StreamingOutputCallResponse{
+			Payload: payload,
+		}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *testServer) StreamingInputCall(stream testpb.TestService_StreamingInputCallServer) error {
+	var sum int
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return stream.SendAndClose(&testpb.StreamingInputCallResponse{
+				AggregatedPayloadSize: proto.Int32(int32(sum)),
+			})
+		}
+		if err != nil {
+			return err
+		}
+		p := in.GetPayload().GetBody()
+		sum += len(p)
+		if s.earlyFail {
+			return grpc.Errorf(codes.NotFound, "not found")
+		}
+	}
+}
+
+func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
+	md, ok := metadata.FromContext(stream.Context())
+	if ok {
+		if s.setAndSendHeader {
+			if err := stream.SetHeader(md); err != nil {
+				return grpc.Errorf(grpc.Code(err), "%v.SetHeader(_, %v) = %v, want <nil>", stream, md, err)
+			}
+			if err := stream.SendHeader(testMetadata2); err != nil {
+				return grpc.Errorf(grpc.Code(err), "%v.SendHeader(_, %v) = %v, want <nil>", stream, testMetadata2, err)
+			}
+		} else if s.setHeaderOnly {
+			if err := stream.SetHeader(md); err != nil {
+				return grpc.Errorf(grpc.Code(err), "%v.SetHeader(_, %v) = %v, want <nil>", stream, md, err)
+			}
+			if err := stream.SetHeader(testMetadata2); err != nil {
+				return grpc.Errorf(grpc.Code(err), "%v.SetHeader(_, %v) = %v, want <nil>", stream, testMetadata2, err)
+			}
+		} else {
+			if err := stream.SendHeader(md); err != nil {
+				return grpc.Errorf(grpc.Code(err), "%v.SendHeader(%v) = %v, want %v", stream, md, err, nil)
+			}
+		}
+		stream.SetTrailer(testTrailerMetadata)
+		if s.multipleSetTrailer {
+			stream.SetTrailer(testTrailerMetadata2)
+		}
+	}
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		cs := in.GetResponseParameters()
+		for _, c := range cs {
+			if us := c.GetIntervalUs(); us > 0 {
+				time.Sleep(time.Duration(us) * time.Microsecond)
+			}
+
+			payload, err := newPayload(in.GetResponseType(), c.GetSize())
+			if err != nil {
+				return err
+			}
+
+			if err := stream.Send(&testpb.StreamingOutputCallResponse{
+				Payload: payload,
+			}); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+func (s *testServer) HalfDuplexCall(stream testpb.TestService_HalfDuplexCallServer) error {
+	var msgBuf []*testpb.StreamingOutputCallRequest
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			// read done.
+			break
+		}
+		if err != nil {
+			return err
+		}
+		msgBuf = append(msgBuf, in)
+	}
+	for _, m := range msgBuf {
+		cs := m.GetResponseParameters()
+		for _, c := range cs {
+			if us := c.GetIntervalUs(); us > 0 {
+				time.Sleep(time.Duration(us) * time.Microsecond)
+			}
+
+			payload, err := newPayload(m.GetResponseType(), c.GetSize())
+			if err != nil {
+				return err
+			}
+
+			if err := stream.Send(&testpb.StreamingOutputCallResponse{
+				Payload: payload,
+			}); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+const tlsDir = "testdata/"
+
+type env struct {
+	name        string
+	network     string // The type of network such as tcp, unix, etc.
+	security    string // The security protocol such as TLS, SSH, etc.
+	httpHandler bool   // whether to use the http.Handler ServerTransport; requires TLS
+	balancer    bool   // whether to use balancer
+}
+
+func (e env) runnable() bool {
+	if runtime.GOOS == "windows" && e.network == "unix" {
+		return false
+	}
+	return true
+}
+
+func (e env) dialer(addr string, timeout time.Duration) (net.Conn, error) {
+	return net.DialTimeout(e.network, addr, timeout)
+}
+
+var (
+	tcpClearEnv   = env{name: "tcp-clear", network: "tcp", balancer: true}
+	tcpTLSEnv     = env{name: "tcp-tls", network: "tcp", security: "tls", balancer: true}
+	unixClearEnv  = env{name: "unix-clear", network: "unix", balancer: true}
+	unixTLSEnv    = env{name: "unix-tls", network: "unix", security: "tls", balancer: true}
+	handlerEnv    = env{name: "handler-tls", network: "tcp", security: "tls", httpHandler: true, balancer: true}
+	noBalancerEnv = env{name: "no-balancer", network: "tcp", security: "tls", balancer: false}
+	// TODO add handlerEnv back when ServeHTTP is stable.
+	allEnv = []env{tcpClearEnv, tcpTLSEnv, unixClearEnv, unixTLSEnv /*handlerEnv,*/, noBalancerEnv}
+)
+
+var onlyEnv = flag.String("only_env", "", "If non-empty, one of 'tcp-clear', 'tcp-tls', 'unix-clear', 'unix-tls', or 'handler-tls' to only run the tests for that environment. Empty means all.")
+
+func listTestEnv() (envs []env) {
+	if *onlyEnv != "" {
+		for _, e := range allEnv {
+			if e.name == *onlyEnv {
+				if !e.runnable() {
+					panic(fmt.Sprintf("--only_env environment %q does not run on %s", *onlyEnv, runtime.GOOS))
+				}
+				return []env{e}
+			}
+		}
+		panic(fmt.Sprintf("invalid --only_env value %q", *onlyEnv))
+	}
+	for _, e := range allEnv {
+		if e.runnable() {
+			envs = append(envs, e)
+		}
+	}
+	return envs
+}
+
+// test is an end-to-end test. It should be created with the newTest
+// func, modified as needed, and then started with its startServer method.
+// It should be cleaned up with the tearDown method.
+type test struct {
+	t *testing.T
+	e env
+
+	ctx    context.Context // valid for life of test, before tearDown
+	cancel context.CancelFunc
+
+	// Configurable knobs, after newTest returns:
+	testServer        testpb.TestServiceServer // nil means none
+	healthServer      *health.Server           // nil means disabled
+	maxStream         uint32
+	tapHandle         tap.ServerInHandle
+	maxMsgSize        int
+	userAgent         string
+	clientCompression bool
+	serverCompression bool
+	unaryClientInt    grpc.UnaryClientInterceptor
+	streamClientInt   grpc.StreamClientInterceptor
+	unaryServerInt    grpc.UnaryServerInterceptor
+	streamServerInt   grpc.StreamServerInterceptor
+	unknownHandler    grpc.StreamHandler
+	sc                <-chan grpc.ServiceConfig
+
+	// srv and srvAddr are set once startServer is called.
+	srv     *grpc.Server
+	srvAddr string
+
+	cc          *grpc.ClientConn // nil until requested via clientConn
+	restoreLogs func()           // nil unless declareLogNoise is used
+}
+
+func (te *test) tearDown() {
+	if te.cancel != nil {
+		te.cancel()
+		te.cancel = nil
+	}
+	if te.cc != nil {
+		te.cc.Close()
+		te.cc = nil
+	}
+	if te.restoreLogs != nil {
+		te.restoreLogs()
+		te.restoreLogs = nil
+	}
+	if te.srv != nil {
+		te.srv.Stop()
+	}
+}
+
+// newTest returns a new test using the provided testing.T and
+// environment.  It is returned with default values. Tests should
+// modify it before calling its startServer and clientConn methods.
+func newTest(t *testing.T, e env) *test {
+	te := &test{
+		t:         t,
+		e:         e,
+		maxStream: math.MaxUint32,
+	}
+	te.ctx, te.cancel = context.WithCancel(context.Background())
+	return te
+}
+
+// startServer starts a gRPC server listening. Callers should defer a
+// call to te.tearDown to clean up.
+func (te *test) startServer(ts testpb.TestServiceServer) {
+	te.testServer = ts
+	te.t.Logf("Running test in %s environment...", te.e.name)
+	sopts := []grpc.ServerOption{grpc.MaxConcurrentStreams(te.maxStream)}
+	if te.maxMsgSize > 0 {
+		sopts = append(sopts, grpc.MaxMsgSize(te.maxMsgSize))
+	}
+	if te.tapHandle != nil {
+		sopts = append(sopts, grpc.InTapHandle(te.tapHandle))
+	}
+	if te.serverCompression {
+		sopts = append(sopts,
+			grpc.RPCCompressor(grpc.NewGZIPCompressor()),
+			grpc.RPCDecompressor(grpc.NewGZIPDecompressor()),
+		)
+	}
+	if te.unaryServerInt != nil {
+		sopts = append(sopts, grpc.UnaryInterceptor(te.unaryServerInt))
+	}
+	if te.streamServerInt != nil {
+		sopts = append(sopts, grpc.StreamInterceptor(te.streamServerInt))
+	}
+	if te.unknownHandler != nil {
+		sopts = append(sopts, grpc.UnknownServiceHandler(te.unknownHandler))
+	}
+	la := "localhost:0"
+	switch te.e.network {
+	case "unix":
+		la = "/tmp/testsock" + fmt.Sprintf("%d", time.Now().UnixNano())
+		syscall.Unlink(la)
+	}
+	lis, err := net.Listen(te.e.network, la)
+	if err != nil {
+		te.t.Fatalf("Failed to listen: %v", err)
+	}
+	switch te.e.security {
+	case "tls":
+		creds, err := credentials.NewServerTLSFromFile(tlsDir+"server1.pem", tlsDir+"server1.key")
+		if err != nil {
+			te.t.Fatalf("Failed to generate credentials %v", err)
+		}
+		sopts = append(sopts, grpc.Creds(creds))
+	case "clientAlwaysFailCred":
+		sopts = append(sopts, grpc.Creds(clientAlwaysFailCred{}))
+	case "clientTimeoutCreds":
+		sopts = append(sopts, grpc.Creds(&clientTimeoutCreds{}))
+	}
+	s := grpc.NewServer(sopts...)
+	te.srv = s
+	if te.e.httpHandler {
+		internal.TestingUseHandlerImpl(s)
+	}
+	if te.healthServer != nil {
+		healthpb.RegisterHealthServer(s, te.healthServer)
+	}
+	if te.testServer != nil {
+		testpb.RegisterTestServiceServer(s, te.testServer)
+	}
+	addr := la
+	switch te.e.network {
+	case "unix":
+	default:
+		_, port, err := net.SplitHostPort(lis.Addr().String())
+		if err != nil {
+			te.t.Fatalf("Failed to parse listener address: %v", err)
+		}
+		addr = "localhost:" + port
+	}
+
+	go s.Serve(lis)
+	te.srvAddr = addr
+}
+
+func (te *test) clientConn() *grpc.ClientConn {
+	if te.cc != nil {
+		return te.cc
+	}
+	opts := []grpc.DialOption{
+		grpc.WithDialer(te.e.dialer),
+		grpc.WithUserAgent(te.userAgent),
+	}
+
+	if te.sc != nil {
+		opts = append(opts, grpc.WithServiceConfig(te.sc))
+	}
+
+	if te.clientCompression {
+		opts = append(opts,
+			grpc.WithCompressor(grpc.NewGZIPCompressor()),
+			grpc.WithDecompressor(grpc.NewGZIPDecompressor()),
+		)
+	}
+	if te.unaryClientInt != nil {
+		opts = append(opts, grpc.WithUnaryInterceptor(te.unaryClientInt))
+	}
+	if te.streamClientInt != nil {
+		opts = append(opts, grpc.WithStreamInterceptor(te.streamClientInt))
+	}
+	if te.maxMsgSize > 0 {
+		opts = append(opts, grpc.WithMaxMsgSize(te.maxMsgSize))
+	}
+	switch te.e.security {
+	case "tls":
+		creds, err := credentials.NewClientTLSFromFile(tlsDir+"ca.pem", "x.test.youtube.com")
+		if err != nil {
+			te.t.Fatalf("Failed to load credentials: %v", err)
+		}
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	case "clientAlwaysFailCred":
+		opts = append(opts, grpc.WithTransportCredentials(clientAlwaysFailCred{}))
+	case "clientTimeoutCreds":
+		opts = append(opts, grpc.WithTransportCredentials(&clientTimeoutCreds{}))
+	default:
+		opts = append(opts, grpc.WithInsecure())
+	}
+	if te.e.balancer {
+		opts = append(opts, grpc.WithBalancer(grpc.RoundRobin(nil)))
+	}
+	var err error
+	te.cc, err = grpc.Dial(te.srvAddr, opts...)
+	if err != nil {
+		te.t.Fatalf("Dial(%q) = %v", te.srvAddr, err)
+	}
+	return te.cc
+}
+
+func (te *test) declareLogNoise(phrases ...string) {
+	te.restoreLogs = declareLogNoise(te.t, phrases...)
+}
+
+func (te *test) withServerTester(fn func(st *serverTester)) {
+	c, err := te.e.dialer(te.srvAddr, 10*time.Second)
+	if err != nil {
+		te.t.Fatal(err)
+	}
+	defer c.Close()
+	if te.e.security == "tls" {
+		c = tls.Client(c, &tls.Config{
+			InsecureSkipVerify: true,
+			NextProtos:         []string{http2.NextProtoTLS},
+		})
+	}
+	st := newServerTesterFromConn(te.t, c)
+	st.greet()
+	fn(st)
+}
+
+func TestTimeoutOnDeadServer(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testTimeoutOnDeadServer(t, e)
+	}
+}
+
+func testTimeoutOnDeadServer(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	te.srv.Stop()
+	ctx, _ := context.WithTimeout(context.Background(), time.Millisecond)
+	_, err := tc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false))
+	if e.balancer && grpc.Code(err) != codes.DeadlineExceeded {
+		// If e.balancer == nil, the ac will stop reconnecting because the dialer returns non-temp error,
+		// the error will be an internal error.
+		t.Fatalf("TestService/EmptyCall(%v, _) = _, %v, want _, error code: %s", ctx, err, codes.DeadlineExceeded)
+	}
+	awaitNewConnLogOutput()
+}
+
+func TestServerGracefulStopIdempotent(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testServerGracefulStopIdempotent(t, e)
+	}
+}
+
+func testServerGracefulStopIdempotent(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	for i := 0; i < 3; i++ {
+		te.srv.GracefulStop()
+	}
+}
+
+func TestServerGoAway(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testServerGoAway(t, e)
+	}
+}
+
+func testServerGoAway(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	// Finish an RPC to make sure the connection is good.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	ch := make(chan struct{})
+	go func() {
+		te.srv.GracefulStop()
+		close(ch)
+	}()
+	// Loop until the server side GoAway signal is propagated to the client.
+	for {
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if _, err := tc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false)); err == nil {
+			continue
+		}
+		break
+	}
+	// A new RPC should fail.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.Unavailable && grpc.Code(err) != codes.Internal {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, %s or %s", err, codes.Unavailable, codes.Internal)
+	}
+	<-ch
+	awaitNewConnLogOutput()
+}
+
+func TestServerGoAwayPendingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testServerGoAwayPendingRPC(t, e)
+	}
+}
+
+func testServerGoAwayPendingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	ctx, cancel := context.WithCancel(context.Background())
+	stream, err := tc.FullDuplexCall(ctx, grpc.FailFast(false))
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	// Finish an RPC to make sure the connection is good.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.EmptyCall(_, _, _) = _, %v, want _, <nil>", tc, err)
+	}
+	ch := make(chan struct{})
+	go func() {
+		te.srv.GracefulStop()
+		close(ch)
+	}()
+	// Loop until the server side GoAway signal is propagated to the client.
+	for {
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if _, err := tc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false)); err == nil {
+			continue
+		}
+		break
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(1),
+		},
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(100))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	// The existing RPC should be still good to proceed.
+	if err := stream.Send(req); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		t.Fatalf("%v.Recv() = _, %v, want _, <nil>", stream, err)
+	}
+	cancel()
+	<-ch
+	awaitNewConnLogOutput()
+}
+
+func TestServerMultipleGoAwayPendingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testServerMultipleGoAwayPendingRPC(t, e)
+	}
+}
+
+func testServerMultipleGoAwayPendingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	ctx, cancel := context.WithCancel(context.Background())
+	stream, err := tc.FullDuplexCall(ctx, grpc.FailFast(false))
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	// Finish an RPC to make sure the connection is good.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.EmptyCall(_, _, _) = _, %v, want _, <nil>", tc, err)
+	}
+	ch1 := make(chan struct{})
+	go func() {
+		te.srv.GracefulStop()
+		close(ch1)
+	}()
+	ch2 := make(chan struct{})
+	go func() {
+		te.srv.GracefulStop()
+		close(ch2)
+	}()
+	// Loop until the server side GoAway signal is propagated to the client.
+	for {
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if _, err := tc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false)); err == nil {
+			continue
+		}
+		break
+	}
+	select {
+	case <-ch1:
+		t.Fatal("GracefulStop() terminated early")
+	case <-ch2:
+		t.Fatal("GracefulStop() terminated early")
+	default:
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(1),
+		},
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(100))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	// The existing RPC should be still good to proceed.
+	if err := stream.Send(req); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		t.Fatalf("%v.Recv() = _, %v, want _, <nil>", stream, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() = %v, want <nil>", stream, err)
+	}
+	<-ch1
+	<-ch2
+	cancel()
+	awaitNewConnLogOutput()
+}
+
+func TestConcurrentClientConnCloseAndServerGoAway(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testConcurrentClientConnCloseAndServerGoAway(t, e)
+	}
+}
+
+func testConcurrentClientConnCloseAndServerGoAway(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.EmptyCall(_, _, _) = _, %v, want _, <nil>", tc, err)
+	}
+	ch := make(chan struct{})
+	// Close ClientConn and Server concurrently.
+	go func() {
+		te.srv.GracefulStop()
+		close(ch)
+	}()
+	go func() {
+		cc.Close()
+	}()
+	<-ch
+}
+
+func TestConcurrentServerStopAndGoAway(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testConcurrentServerStopAndGoAway(t, e)
+	}
+}
+
+func testConcurrentServerStopAndGoAway(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	stream, err := tc.FullDuplexCall(context.Background(), grpc.FailFast(false))
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	// Finish an RPC to make sure the connection is good.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		t.Fatalf("%v.EmptyCall(_, _, _) = _, %v, want _, <nil>", tc, err)
+	}
+	ch := make(chan struct{})
+	go func() {
+		te.srv.GracefulStop()
+		close(ch)
+	}()
+	// Loop until the server side GoAway signal is propagated to the client.
+	for {
+		ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+		if _, err := tc.EmptyCall(ctx, &testpb.Empty{}, grpc.FailFast(false)); err == nil {
+			continue
+		}
+		break
+	}
+	// Stop the server and close all the connections.
+	te.srv.Stop()
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(1),
+		},
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(100))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	if err := stream.Send(req); err == nil {
+		if _, err := stream.Recv(); err == nil {
+			t.Fatalf("%v.Recv() = _, %v, want _, <nil>", stream, err)
+		}
+	}
+	<-ch
+	awaitNewConnLogOutput()
+}
+
+func TestFailFast(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testFailFast(t, e)
+	}
+}
+
+func testFailFast(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); err != nil {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	// Stop the server and tear down all the exisiting connections.
+	te.srv.Stop()
+	// Loop until the server teardown is propagated to the client.
+	for {
+		_, err := tc.EmptyCall(context.Background(), &testpb.Empty{})
+		if grpc.Code(err) == codes.Unavailable {
+			break
+		}
+		fmt.Printf("%v.EmptyCall(_, _) = _, %v", tc, err)
+		time.Sleep(10 * time.Millisecond)
+	}
+	// The client keeps reconnecting and ongoing fail-fast RPCs should fail with code.Unavailable.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("TestService/EmptyCall(_, _, _) = _, %v, want _, error code: %s", err, codes.Unavailable)
+	}
+	if _, err := tc.StreamingInputCall(context.Background()); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("TestService/StreamingInputCall(_) = _, %v, want _, error code: %s", err, codes.Unavailable)
+	}
+
+	awaitNewConnLogOutput()
+}
+
+func TestServiceConfig(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testServiceConfig(t, e)
+	}
+}
+
+func testServiceConfig(t *testing.T, e env) {
+	te := newTest(t, e)
+	ch := make(chan grpc.ServiceConfig)
+	te.sc = ch
+	te.userAgent = testAppUA
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+		"Failed to dial : context canceled; please retry.",
+	)
+	defer te.tearDown()
+
+	var wg sync.WaitGroup
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		mc := grpc.MethodConfig{
+			WaitForReady: true,
+			Timeout:      time.Millisecond,
+		}
+		m := make(map[string]grpc.MethodConfig)
+		m["/grpc.testing.TestService/EmptyCall"] = mc
+		m["/grpc.testing.TestService/FullDuplexCall"] = mc
+		sc := grpc.ServiceConfig{
+			Methods: m,
+		}
+		ch <- sc
+	}()
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	// The following RPCs are expected to become non-fail-fast ones with 1ms deadline.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.DeadlineExceeded {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, %s", err, codes.DeadlineExceeded)
+	}
+	if _, err := tc.FullDuplexCall(context.Background()); grpc.Code(err) != codes.DeadlineExceeded {
+		t.Fatalf("TestService/FullDuplexCall(_) = _, %v, want %s", err, codes.DeadlineExceeded)
+	}
+	wg.Wait()
+	// Generate a service config update.
+	mc := grpc.MethodConfig{
+		WaitForReady: false,
+	}
+	m := make(map[string]grpc.MethodConfig)
+	m["/grpc.testing.TestService/EmptyCall"] = mc
+	m["/grpc.testing.TestService/FullDuplexCall"] = mc
+	sc := grpc.ServiceConfig{
+		Methods: m,
+	}
+	ch <- sc
+	// Loop until the new update becomes effective.
+	for {
+		if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.Unavailable {
+			continue
+		}
+		break
+	}
+	// The following RPCs are expected to become fail-fast.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, %s", err, codes.Unavailable)
+	}
+	if _, err := tc.FullDuplexCall(context.Background()); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("TestService/FullDuplexCall(_) = _, %v, want %s", err, codes.Unavailable)
+	}
+}
+
+func TestTap(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testTap(t, e)
+	}
+}
+
+type myTap struct {
+	cnt int
+}
+
+func (t *myTap) handle(ctx context.Context, info *tap.Info) (context.Context, error) {
+	if info != nil {
+		if info.FullMethodName == "/grpc.testing.TestService/EmptyCall" {
+			t.cnt++
+		} else if info.FullMethodName == "/grpc.testing.TestService/UnaryCall" {
+			return nil, fmt.Errorf("tap error")
+		}
+	}
+	return ctx, nil
+}
+
+func testTap(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	ttap := &myTap{}
+	te.tapHandle = ttap.handle
+	te.declareLogNoise(
+		"transport: http2Client.notifyError got notified that the client transport was broken EOF",
+		"grpc: addrConn.transportMonitor exits due to: grpc: the connection is closing",
+		"grpc: addrConn.resetTransport failed to create client transport: connection error",
+	)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); err != nil {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	if ttap.cnt != 1 {
+		t.Fatalf("Get the count in ttap %d, want 1", ttap.cnt)
+	}
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, 31)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(45),
+		Payload:      payload,
+	}
+	if _, err := tc.UnaryCall(context.Background(), req); grpc.Code(err) != codes.Unavailable {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, %s", err, codes.Unavailable)
+	}
+}
+
+func healthCheck(d time.Duration, cc *grpc.ClientConn, serviceName string) (*healthpb.HealthCheckResponse, error) {
+	ctx, _ := context.WithTimeout(context.Background(), d)
+	hc := healthpb.NewHealthClient(cc)
+	req := &healthpb.HealthCheckRequest{
+		Service: serviceName,
+	}
+	return hc.Check(ctx, req)
+}
+
+func TestHealthCheckOnSuccess(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testHealthCheckOnSuccess(t, e)
+	}
+}
+
+func testHealthCheckOnSuccess(t *testing.T, e env) {
+	te := newTest(t, e)
+	hs := health.NewServer()
+	hs.SetServingStatus("grpc.health.v1.Health", 1)
+	te.healthServer = hs
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	if _, err := healthCheck(1*time.Second, cc, "grpc.health.v1.Health"); err != nil {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, <nil>", err)
+	}
+}
+
+func TestHealthCheckOnFailure(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testHealthCheckOnFailure(t, e)
+	}
+}
+
+func testHealthCheckOnFailure(t *testing.T, e env) {
+	defer leakCheck(t)()
+	te := newTest(t, e)
+	te.declareLogNoise(
+		"Failed to dial ",
+		"grpc: the client connection is closing; please retry",
+	)
+	hs := health.NewServer()
+	hs.SetServingStatus("grpc.health.v1.HealthCheck", 1)
+	te.healthServer = hs
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	wantErr := grpc.Errorf(codes.DeadlineExceeded, "context deadline exceeded")
+	if _, err := healthCheck(0*time.Second, cc, "grpc.health.v1.Health"); !equalErrors(err, wantErr) {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, error code %s", err, codes.DeadlineExceeded)
+	}
+	awaitNewConnLogOutput()
+}
+
+func TestHealthCheckOff(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		// TODO(bradfitz): Temporarily skip this env due to #619.
+		if e.name == "handler-tls" {
+			continue
+		}
+		testHealthCheckOff(t, e)
+	}
+}
+
+func testHealthCheckOff(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	want := grpc.Errorf(codes.Unimplemented, "unknown service grpc.health.v1.Health")
+	if _, err := healthCheck(1*time.Second, te.clientConn(), ""); !equalErrors(err, want) {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, %v", err, want)
+	}
+}
+
+func TestUnknownHandler(t *testing.T) {
+	defer leakCheck(t)()
+	// An example unknownHandler that returns a different code and a different method, making sure that we do not
+	// expose what methods are implemented to a client that is not authenticated.
+	unknownHandler := func(srv interface{}, stream grpc.ServerStream) error {
+		return grpc.Errorf(codes.Unauthenticated, "user unauthenticated")
+	}
+	for _, e := range listTestEnv() {
+		// TODO(bradfitz): Temporarily skip this env due to #619.
+		if e.name == "handler-tls" {
+			continue
+		}
+		testUnknownHandler(t, e, unknownHandler)
+	}
+}
+
+func testUnknownHandler(t *testing.T, e env, unknownHandler grpc.StreamHandler) {
+	te := newTest(t, e)
+	te.unknownHandler = unknownHandler
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	want := grpc.Errorf(codes.Unauthenticated, "user unauthenticated")
+	if _, err := healthCheck(1*time.Second, te.clientConn(), ""); !equalErrors(err, want) {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, %v", err, want)
+	}
+}
+
+func TestHealthCheckServingStatus(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testHealthCheckServingStatus(t, e)
+	}
+}
+
+func testHealthCheckServingStatus(t *testing.T, e env) {
+	te := newTest(t, e)
+	hs := health.NewServer()
+	te.healthServer = hs
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	out, err := healthCheck(1*time.Second, cc, "")
+	if err != nil {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, <nil>", err)
+	}
+	if out.Status != healthpb.HealthCheckResponse_SERVING {
+		t.Fatalf("Got the serving status %v, want SERVING", out.Status)
+	}
+	wantErr := grpc.Errorf(codes.NotFound, "unknown service")
+	if _, err := healthCheck(1*time.Second, cc, "grpc.health.v1.Health"); !equalErrors(err, wantErr) {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, error code %s", err, codes.NotFound)
+	}
+	hs.SetServingStatus("grpc.health.v1.Health", healthpb.HealthCheckResponse_SERVING)
+	out, err = healthCheck(1*time.Second, cc, "grpc.health.v1.Health")
+	if err != nil {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, <nil>", err)
+	}
+	if out.Status != healthpb.HealthCheckResponse_SERVING {
+		t.Fatalf("Got the serving status %v, want SERVING", out.Status)
+	}
+	hs.SetServingStatus("grpc.health.v1.Health", healthpb.HealthCheckResponse_NOT_SERVING)
+	out, err = healthCheck(1*time.Second, cc, "grpc.health.v1.Health")
+	if err != nil {
+		t.Fatalf("Health/Check(_, _) = _, %v, want _, <nil>", err)
+	}
+	if out.Status != healthpb.HealthCheckResponse_NOT_SERVING {
+		t.Fatalf("Got the serving status %v, want NOT_SERVING", out.Status)
+	}
+
+}
+
+func TestErrorChanNoIO(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testErrorChanNoIO(t, e)
+	}
+}
+
+func testErrorChanNoIO(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	if _, err := tc.FullDuplexCall(context.Background()); err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+}
+
+func TestEmptyUnaryWithUserAgent(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testEmptyUnaryWithUserAgent(t, e)
+	}
+}
+
+func testEmptyUnaryWithUserAgent(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	var header metadata.MD
+	reply, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Header(&header))
+	if err != nil || !proto.Equal(&testpb.Empty{}, reply) {
+		t.Fatalf("TestService/EmptyCall(_, _) = %v, %v, want %v, <nil>", reply, err, &testpb.Empty{})
+	}
+	if v, ok := header["ua"]; !ok || v[0] != testAppUA {
+		t.Fatalf("header[\"ua\"] = %q, %t, want %q, true", v, ok, testAppUA)
+	}
+
+	te.srv.Stop()
+}
+
+func TestFailedEmptyUnary(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testFailedEmptyUnary(t, e)
+	}
+}
+
+func testFailedEmptyUnary(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	wantErr := grpc.Errorf(codes.DataLoss, "missing expected user-agent")
+	if _, err := tc.EmptyCall(ctx, &testpb.Empty{}); !equalErrors(err, wantErr) {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, %v", err, wantErr)
+	}
+}
+
+func TestLargeUnary(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testLargeUnary(t, e)
+	}
+}
+
+func testLargeUnary(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const argSize = 271828
+	const respSize = 314159
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	reply, err := tc.UnaryCall(context.Background(), req)
+	if err != nil {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	pt := reply.GetPayload().GetType()
+	ps := len(reply.GetPayload().GetBody())
+	if pt != testpb.PayloadType_COMPRESSABLE || ps != respSize {
+		t.Fatalf("Got the reply with type %d len %d; want %d, %d", pt, ps, testpb.PayloadType_COMPRESSABLE, respSize)
+	}
+}
+
+func TestExceedMsgLimit(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testExceedMsgLimit(t, e)
+	}
+}
+
+func testExceedMsgLimit(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.maxMsgSize = 1024
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	argSize := int32(te.maxMsgSize + 1)
+	const smallSize = 1
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+	smallPayload, err := newPayload(testpb.PayloadType_COMPRESSABLE, smallSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// test on server side for unary RPC
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(smallSize),
+		Payload:      payload,
+	}
+	if _, err := tc.UnaryCall(context.Background(), req); err == nil || grpc.Code(err) != codes.Internal {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, error code: %s", err, codes.Internal)
+	}
+	// test on client side for unary RPC
+	req.ResponseSize = proto.Int32(int32(te.maxMsgSize) + 1)
+	req.Payload = smallPayload
+	if _, err := tc.UnaryCall(context.Background(), req); err == nil || grpc.Code(err) != codes.Internal {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, error code: %s", err, codes.Internal)
+	}
+
+	// test on server side for streaming RPC
+	stream, err := tc.FullDuplexCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(1),
+		},
+	}
+
+	spayload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(te.maxMsgSize+1))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	sreq := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            spayload,
+	}
+	if err := stream.Send(sreq); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, sreq, err)
+	}
+	if _, err := stream.Recv(); err == nil || grpc.Code(err) != codes.Internal {
+		t.Fatalf("%v.Recv() = _, %v, want _, error code: %s", stream, err, codes.Internal)
+	}
+
+	// test on client side for streaming RPC
+	stream, err = tc.FullDuplexCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	respParam[0].Size = proto.Int32(int32(te.maxMsgSize) + 1)
+	sreq.Payload = smallPayload
+	if err := stream.Send(sreq); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, sreq, err)
+	}
+	if _, err := stream.Recv(); err == nil || grpc.Code(err) != codes.Internal {
+		t.Fatalf("%v.Recv() = _, %v, want _, error code: %s", stream, err, codes.Internal)
+	}
+
+}
+
+func TestPeerClientSide(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testPeerClientSide(t, e)
+	}
+}
+
+func testPeerClientSide(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	peer := new(peer.Peer)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.Peer(peer), grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	pa := peer.Addr.String()
+	if e.network == "unix" {
+		if pa != te.srvAddr {
+			t.Fatalf("peer.Addr = %v, want %v", pa, te.srvAddr)
+		}
+		return
+	}
+	_, pp, err := net.SplitHostPort(pa)
+	if err != nil {
+		t.Fatalf("Failed to parse address from peer.")
+	}
+	_, sp, err := net.SplitHostPort(te.srvAddr)
+	if err != nil {
+		t.Fatalf("Failed to parse address of test server.")
+	}
+	if pp != sp {
+		t.Fatalf("peer.Addr = localhost:%v, want localhost:%v", pp, sp)
+	}
+}
+
+func TestMetadataUnaryRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testMetadataUnaryRPC(t, e)
+	}
+}
+
+func testMetadataUnaryRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const argSize = 2718
+	const respSize = 314
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	var header, trailer metadata.MD
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	if _, err := tc.UnaryCall(ctx, req, grpc.Header(&header), grpc.Trailer(&trailer)); err != nil {
+		t.Fatalf("TestService.UnaryCall(%v, _, _, _) = _, %v; want _, <nil>", ctx, err)
+	}
+	// Ignore optional response headers that Servers may set:
+	if header != nil {
+		delete(header, "trailer") // RFC 2616 says server SHOULD (but optional) declare trailers
+		delete(header, "date")    // the Date header is also optional
+	}
+	if !reflect.DeepEqual(header, testMetadata) {
+		t.Fatalf("Received header metadata %v, want %v", header, testMetadata)
+	}
+	if !reflect.DeepEqual(trailer, testTrailerMetadata) {
+		t.Fatalf("Received trailer metadata %v, want %v", trailer, testTrailerMetadata)
+	}
+}
+
+func TestMultipleSetTrailerUnaryRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testMultipleSetTrailerUnaryRPC(t, e)
+	}
+}
+
+func testMultipleSetTrailerUnaryRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, multipleSetTrailer: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = 1
+	)
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	var trailer metadata.MD
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	if _, err := tc.UnaryCall(ctx, req, grpc.Trailer(&trailer), grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService.UnaryCall(%v, _, _, _) = _, %v; want _, <nil>", ctx, err)
+	}
+	expectedTrailer := metadata.Join(testTrailerMetadata, testTrailerMetadata2)
+	if !reflect.DeepEqual(trailer, expectedTrailer) {
+		t.Fatalf("Received trailer metadata %v, want %v", trailer, expectedTrailer)
+	}
+}
+
+func TestMultipleSetTrailerStreamingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testMultipleSetTrailerStreamingRPC(t, e)
+	}
+}
+
+func testMultipleSetTrailerStreamingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, multipleSetTrailer: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	stream, err := tc.FullDuplexCall(ctx, grpc.FailFast(false))
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		t.Fatalf("%v failed to complele the FullDuplexCall: %v", stream, err)
+	}
+
+	trailer := stream.Trailer()
+	expectedTrailer := metadata.Join(testTrailerMetadata, testTrailerMetadata2)
+	if !reflect.DeepEqual(trailer, expectedTrailer) {
+		t.Fatalf("Received trailer metadata %v, want %v", trailer, expectedTrailer)
+	}
+}
+
+func TestSetAndSendHeaderUnaryRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testSetAndSendHeaderUnaryRPC(t, e)
+	}
+}
+
+// To test header metadata is sent on SendHeader().
+func testSetAndSendHeaderUnaryRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setAndSendHeader: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = 1
+	)
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	var header metadata.MD
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	if _, err := tc.UnaryCall(ctx, req, grpc.Header(&header), grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService.UnaryCall(%v, _, _, _) = _, %v; want _, <nil>", ctx, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+}
+
+func TestMultipleSetHeaderUnaryRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testMultipleSetHeaderUnaryRPC(t, e)
+	}
+}
+
+// To test header metadata is sent when sending response.
+func testMultipleSetHeaderUnaryRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setHeaderOnly: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = 1
+	)
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+
+	var header metadata.MD
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	if _, err := tc.UnaryCall(ctx, req, grpc.Header(&header), grpc.FailFast(false)); err != nil {
+		t.Fatalf("TestService.UnaryCall(%v, _, _, _) = _, %v; want _, <nil>", ctx, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+}
+
+func TestMultipleSetHeaderUnaryRPCError(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testMultipleSetHeaderUnaryRPCError(t, e)
+	}
+}
+
+// To test header metadata is sent when sending status.
+func testMultipleSetHeaderUnaryRPCError(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setHeaderOnly: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = -1 // Invalid respSize to make RPC fail.
+	)
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	var header metadata.MD
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	if _, err := tc.UnaryCall(ctx, req, grpc.Header(&header), grpc.FailFast(false)); err == nil {
+		t.Fatalf("TestService.UnaryCall(%v, _, _, _) = _, %v; want _, <non-nil>", ctx, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+}
+
+func TestSetAndSendHeaderStreamingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testSetAndSendHeaderStreamingRPC(t, e)
+	}
+}
+
+// To test header metadata is sent on SendHeader().
+func testSetAndSendHeaderStreamingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setAndSendHeader: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = 1
+	)
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	stream, err := tc.FullDuplexCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		t.Fatalf("%v failed to complele the FullDuplexCall: %v", stream, err)
+	}
+
+	header, err := stream.Header()
+	if err != nil {
+		t.Fatalf("%v.Header() = _, %v, want _, <nil>", stream, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+}
+
+func TestMultipleSetHeaderStreamingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testMultipleSetHeaderStreamingRPC(t, e)
+	}
+}
+
+// To test header metadata is sent when sending response.
+func testMultipleSetHeaderStreamingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setHeaderOnly: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = 1
+	)
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	stream, err := tc.FullDuplexCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: []*testpb.ResponseParameters{
+			{Size: proto.Int32(respSize)},
+		},
+		Payload: payload,
+	}
+	if err := stream.Send(req); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		t.Fatalf("%v.Recv() = %v, want <nil>", stream, err)
+	}
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		t.Fatalf("%v failed to complele the FullDuplexCall: %v", stream, err)
+	}
+
+	header, err := stream.Header()
+	if err != nil {
+		t.Fatalf("%v.Header() = _, %v, want _, <nil>", stream, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+
+}
+
+func TestMultipleSetHeaderStreamingRPCError(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testMultipleSetHeaderStreamingRPCError(t, e)
+	}
+}
+
+// To test header metadata is sent when sending status.
+func testMultipleSetHeaderStreamingRPCError(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, setHeaderOnly: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const (
+		argSize  = 1
+		respSize = -1
+	)
+	ctx := metadata.NewContext(context.Background(), testMetadata)
+	stream, err := tc.FullDuplexCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: []*testpb.ResponseParameters{
+			{Size: proto.Int32(respSize)},
+		},
+		Payload: payload,
+	}
+	if err := stream.Send(req); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+	}
+	if _, err := stream.Recv(); err == nil {
+		t.Fatalf("%v.Recv() = %v, want <non-nil>", stream, err)
+	}
+
+	header, err := stream.Header()
+	if err != nil {
+		t.Fatalf("%v.Header() = _, %v, want _, <nil>", stream, err)
+	}
+	expectedHeader := metadata.Join(testMetadata, testMetadata2)
+	if !reflect.DeepEqual(header, expectedHeader) {
+		t.Fatalf("Received header metadata %v, want %v", header, expectedHeader)
+	}
+
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+}
+
+// TestMalformedHTTP2Metedata verfies the returned error when the client
+// sends an illegal metadata.
+func TestMalformedHTTP2Metadata(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testMalformedHTTP2Metadata(t, e)
+	}
+}
+
+func testMalformedHTTP2Metadata(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, 2718)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(314),
+		Payload:      payload,
+	}
+	ctx := metadata.NewContext(context.Background(), malformedHTTP2Metadata)
+	if _, err := tc.UnaryCall(ctx, req); grpc.Code(err) != codes.Internal {
+		t.Fatalf("TestService.UnaryCall(%v, _) = _, %v; want _, %s", ctx, err, codes.Internal)
+	}
+}
+
+func performOneRPC(t *testing.T, tc testpb.TestServiceClient, wg *sync.WaitGroup) {
+	defer wg.Done()
+	const argSize = 2718
+	const respSize = 314
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	reply, err := tc.UnaryCall(context.Background(), req, grpc.FailFast(false))
+	if err != nil {
+		t.Errorf("TestService/UnaryCall(_, _) = _, %v, want _, <nil>", err)
+		return
+	}
+	pt := reply.GetPayload().GetType()
+	ps := len(reply.GetPayload().GetBody())
+	if pt != testpb.PayloadType_COMPRESSABLE || ps != respSize {
+		t.Errorf("Got reply with type %d len %d; want %d, %d", pt, ps, testpb.PayloadType_COMPRESSABLE, respSize)
+		return
+	}
+}
+
+func TestRetry(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testRetry(t, e)
+	}
+}
+
+// This test mimics a user who sends 1000 RPCs concurrently on a faulty transport.
+// TODO(zhaoq): Refactor to make this clearer and add more cases to test racy
+// and error-prone paths.
+func testRetry(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise("transport: http2Client.notifyError got notified that the client transport was broken")
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	var wg sync.WaitGroup
+
+	numRPC := 1000
+	rpcSpacing := 2 * time.Millisecond
+	if raceMode {
+		// The race detector has a limit on how many goroutines it can track.
+		// This test is near the upper limit, and goes over the limit
+		// depending on the environment (the http.Handler environment uses
+		// more goroutines)
+		t.Logf("Shortening test in race mode.")
+		numRPC /= 2
+		rpcSpacing *= 2
+	}
+
+	wg.Add(1)
+	go func() {
+		// Halfway through starting RPCs, kill all connections:
+		time.Sleep(time.Duration(numRPC/2) * rpcSpacing)
+
+		// The server shuts down the network connection to make a
+		// transport error which will be detected by the client side
+		// code.
+		internal.TestingCloseConns(te.srv)
+		wg.Done()
+	}()
+	// All these RPCs should succeed eventually.
+	for i := 0; i < numRPC; i++ {
+		time.Sleep(rpcSpacing)
+		wg.Add(1)
+		go performOneRPC(t, tc, &wg)
+	}
+	wg.Wait()
+}
+
+func TestRPCTimeout(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testRPCTimeout(t, e)
+	}
+}
+
+// TODO(zhaoq): Have a better test coverage of timeout and cancellation mechanism.
+func testRPCTimeout(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	const argSize = 2718
+	const respSize = 314
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	for i := -1; i <= 10; i++ {
+		ctx, _ := context.WithTimeout(context.Background(), time.Duration(i)*time.Millisecond)
+		if _, err := tc.UnaryCall(ctx, req); grpc.Code(err) != codes.DeadlineExceeded {
+			t.Fatalf("TestService/UnaryCallv(_, _) = _, %v; want <nil>, error code: %s", err, codes.DeadlineExceeded)
+		}
+	}
+}
+
+func TestCancel(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testCancel(t, e)
+	}
+}
+
+func testCancel(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise("grpc: the client connection is closing; please retry")
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	const argSize = 2718
+	const respSize = 314
+
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	time.AfterFunc(1*time.Millisecond, cancel)
+	if r, err := tc.UnaryCall(ctx, req); grpc.Code(err) != codes.Canceled {
+		t.Fatalf("TestService/UnaryCall(_, _) = %v, %v; want _, error code: %s", r, err, codes.Canceled)
+	}
+	awaitNewConnLogOutput()
+}
+
+func TestCancelNoIO(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testCancelNoIO(t, e)
+	}
+}
+
+func testCancelNoIO(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise("http2Client.notifyError got notified that the client transport was broken")
+	te.maxStream = 1 // Only allows 1 live stream per server transport.
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	// Start one blocked RPC for which we'll never send streaming
+	// input. This will consume the 1 maximum concurrent streams,
+	// causing future RPCs to hang.
+	ctx, cancelFirst := context.WithCancel(context.Background())
+	_, err := tc.StreamingInputCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, <nil>", tc, err)
+	}
+
+	// Loop until the ClientConn receives the initial settings
+	// frame from the server, notifying it about the maximum
+	// concurrent streams. We know when it's received it because
+	// an RPC will fail with codes.DeadlineExceeded instead of
+	// succeeding.
+	// TODO(bradfitz): add internal test hook for this (Issue 534)
+	for {
+		ctx, cancelSecond := context.WithTimeout(context.Background(), 250*time.Millisecond)
+		_, err := tc.StreamingInputCall(ctx)
+		cancelSecond()
+		if err == nil {
+			time.Sleep(50 * time.Millisecond)
+			continue
+		}
+		if grpc.Code(err) == codes.DeadlineExceeded {
+			break
+		}
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, %s", tc, err, codes.DeadlineExceeded)
+	}
+	// If there are any RPCs in flight before the client receives
+	// the max streams setting, let them be expired.
+	// TODO(bradfitz): add internal test hook for this (Issue 534)
+	time.Sleep(500 * time.Millisecond)
+
+	ch := make(chan struct{})
+	go func() {
+		defer close(ch)
+
+		// This should be blocked until the 1st is canceled.
+		ctx, cancelThird := context.WithTimeout(context.Background(), 2*time.Second)
+		if _, err := tc.StreamingInputCall(ctx); err != nil {
+			t.Errorf("%v.StreamingInputCall(_) = _, %v, want _, <nil>", tc, err)
+		}
+		cancelThird()
+	}()
+	cancelFirst()
+	<-ch
+}
+
+// The following tests the gRPC streaming RPC implementations.
+// TODO(zhaoq): Have better coverage on error cases.
+var (
+	reqSizes  = []int{27182, 8, 1828, 45904}
+	respSizes = []int{31415, 9, 2653, 58979}
+)
+
+func TestNoService(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testNoService(t, e)
+	}
+}
+
+func testNoService(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(nil)
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	stream, err := tc.FullDuplexCall(te.ctx, grpc.FailFast(false))
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	if _, err := stream.Recv(); grpc.Code(err) != codes.Unimplemented {
+		t.Fatalf("stream.Recv() = _, %v, want _, error code %s", err, codes.Unimplemented)
+	}
+}
+
+func TestPingPong(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testPingPong(t, e)
+	}
+}
+
+func testPingPong(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	stream, err := tc.FullDuplexCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	var index int
+	for index < len(reqSizes) {
+		respParam := []*testpb.ResponseParameters{
+			{
+				Size: proto.Int32(int32(respSizes[index])),
+			},
+		}
+
+		payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(reqSizes[index]))
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		req := &testpb.StreamingOutputCallRequest{
+			ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+			ResponseParameters: respParam,
+			Payload:            payload,
+		}
+		if err := stream.Send(req); err != nil {
+			t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+		}
+		reply, err := stream.Recv()
+		if err != nil {
+			t.Fatalf("%v.Recv() = %v, want <nil>", stream, err)
+		}
+		pt := reply.GetPayload().GetType()
+		if pt != testpb.PayloadType_COMPRESSABLE {
+			t.Fatalf("Got the reply of type %d, want %d", pt, testpb.PayloadType_COMPRESSABLE)
+		}
+		size := len(reply.GetPayload().GetBody())
+		if size != int(respSizes[index]) {
+			t.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
+		}
+		index++
+	}
+	if err := stream.CloseSend(); err != nil {
+		t.Fatalf("%v.CloseSend() got %v, want %v", stream, err, nil)
+	}
+	if _, err := stream.Recv(); err != io.EOF {
+		t.Fatalf("%v failed to complele the ping pong test: %v", stream, err)
+	}
+}
+
+func TestMetadataStreamingRPC(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testMetadataStreamingRPC(t, e)
+	}
+}
+
+func testMetadataStreamingRPC(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	ctx := metadata.NewContext(te.ctx, testMetadata)
+	stream, err := tc.FullDuplexCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	go func() {
+		headerMD, err := stream.Header()
+		if e.security == "tls" {
+			delete(headerMD, "transport_security_type")
+		}
+		delete(headerMD, "trailer") // ignore if present
+		if err != nil || !reflect.DeepEqual(testMetadata, headerMD) {
+			t.Errorf("#1 %v.Header() = %v, %v, want %v, <nil>", stream, headerMD, err, testMetadata)
+		}
+		// test the cached value.
+		headerMD, err = stream.Header()
+		delete(headerMD, "trailer") // ignore if present
+		if err != nil || !reflect.DeepEqual(testMetadata, headerMD) {
+			t.Errorf("#2 %v.Header() = %v, %v, want %v, <nil>", stream, headerMD, err, testMetadata)
+		}
+		var index int
+		for index < len(reqSizes) {
+			respParam := []*testpb.ResponseParameters{
+				{
+					Size: proto.Int32(int32(respSizes[index])),
+				},
+			}
+
+			payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(reqSizes[index]))
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			req := &testpb.StreamingOutputCallRequest{
+				ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+				ResponseParameters: respParam,
+				Payload:            payload,
+			}
+			if err := stream.Send(req); err != nil {
+				t.Errorf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+				return
+			}
+			index++
+		}
+		// Tell the server we're done sending args.
+		stream.CloseSend()
+	}()
+	for {
+		if _, err := stream.Recv(); err != nil {
+			break
+		}
+	}
+	trailerMD := stream.Trailer()
+	if !reflect.DeepEqual(testTrailerMetadata, trailerMD) {
+		t.Fatalf("%v.Trailer() = %v, want %v", stream, trailerMD, testTrailerMetadata)
+	}
+}
+
+func TestServerStreaming(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testServerStreaming(t, e)
+	}
+}
+
+func testServerStreaming(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	respParam := make([]*testpb.ResponseParameters, len(respSizes))
+	for i, s := range respSizes {
+		respParam[i] = &testpb.ResponseParameters{
+			Size: proto.Int32(int32(s)),
+		}
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+	}
+	stream, err := tc.StreamingOutputCall(context.Background(), req)
+	if err != nil {
+		t.Fatalf("%v.StreamingOutputCall(_) = _, %v, want <nil>", tc, err)
+	}
+	var rpcStatus error
+	var respCnt int
+	var index int
+	for {
+		reply, err := stream.Recv()
+		if err != nil {
+			rpcStatus = err
+			break
+		}
+		pt := reply.GetPayload().GetType()
+		if pt != testpb.PayloadType_COMPRESSABLE {
+			t.Fatalf("Got the reply of type %d, want %d", pt, testpb.PayloadType_COMPRESSABLE)
+		}
+		size := len(reply.GetPayload().GetBody())
+		if size != int(respSizes[index]) {
+			t.Fatalf("Got reply body of length %d, want %d", size, respSizes[index])
+		}
+		index++
+		respCnt++
+	}
+	if rpcStatus != io.EOF {
+		t.Fatalf("Failed to finish the server streaming rpc: %v, want <EOF>", rpcStatus)
+	}
+	if respCnt != len(respSizes) {
+		t.Fatalf("Got %d reply, want %d", len(respSizes), respCnt)
+	}
+}
+
+func TestFailedServerStreaming(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testFailedServerStreaming(t, e)
+	}
+}
+
+func testFailedServerStreaming(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	respParam := make([]*testpb.ResponseParameters, len(respSizes))
+	for i, s := range respSizes {
+		respParam[i] = &testpb.ResponseParameters{
+			Size: proto.Int32(int32(s)),
+		}
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+	}
+	ctx := metadata.NewContext(te.ctx, testMetadata)
+	stream, err := tc.StreamingOutputCall(ctx, req)
+	if err != nil {
+		t.Fatalf("%v.StreamingOutputCall(_) = _, %v, want <nil>", tc, err)
+	}
+	wantErr := grpc.Errorf(codes.DataLoss, "got extra metadata")
+	if _, err := stream.Recv(); !equalErrors(err, wantErr) {
+		t.Fatalf("%v.Recv() = _, %v, want _, %v", stream, err, wantErr)
+	}
+}
+
+// concurrentSendServer is a TestServiceServer whose
+// StreamingOutputCall makes ten serial Send calls, sending payloads
+// "0".."9", inclusive.  TestServerStreamingConcurrent verifies they
+// were received in the correct order, and that there were no races.
+//
+// All other TestServiceServer methods crash if called.
+type concurrentSendServer struct {
+	testpb.TestServiceServer
+}
+
+func (s concurrentSendServer) StreamingOutputCall(args *testpb.StreamingOutputCallRequest, stream testpb.TestService_StreamingOutputCallServer) error {
+	for i := 0; i < 10; i++ {
+		stream.Send(&testpb.StreamingOutputCallResponse{
+			Payload: &testpb.Payload{
+				Body: []byte{'0' + uint8(i)},
+			},
+		})
+	}
+	return nil
+}
+
+// Tests doing a bunch of concurrent streaming output calls.
+func TestServerStreamingConcurrent(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testServerStreamingConcurrent(t, e)
+	}
+}
+
+func testServerStreamingConcurrent(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(concurrentSendServer{})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	doStreamingCall := func() {
+		req := &testpb.StreamingOutputCallRequest{}
+		stream, err := tc.StreamingOutputCall(context.Background(), req)
+		if err != nil {
+			t.Errorf("%v.StreamingOutputCall(_) = _, %v, want <nil>", tc, err)
+			return
+		}
+		var ngot int
+		var buf bytes.Buffer
+		for {
+			reply, err := stream.Recv()
+			if err == io.EOF {
+				break
+			}
+			if err != nil {
+				t.Fatal(err)
+			}
+			ngot++
+			if buf.Len() > 0 {
+				buf.WriteByte(',')
+			}
+			buf.Write(reply.GetPayload().GetBody())
+		}
+		if want := 10; ngot != want {
+			t.Errorf("Got %d replies, want %d", ngot, want)
+		}
+		if got, want := buf.String(), "0,1,2,3,4,5,6,7,8,9"; got != want {
+			t.Errorf("Got replies %q; want %q", got, want)
+		}
+	}
+
+	var wg sync.WaitGroup
+	for i := 0; i < 20; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			doStreamingCall()
+		}()
+	}
+	wg.Wait()
+
+}
+
+func TestClientStreaming(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testClientStreaming(t, e)
+	}
+}
+
+func testClientStreaming(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	stream, err := tc.StreamingInputCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want <nil>", tc, err)
+	}
+
+	var sum int
+	for _, s := range reqSizes {
+		payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(s))
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		req := &testpb.StreamingInputCallRequest{
+			Payload: payload,
+		}
+		if err := stream.Send(req); err != nil {
+			t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+		}
+		sum += s
+	}
+	reply, err := stream.CloseAndRecv()
+	if err != nil {
+		t.Fatalf("%v.CloseAndRecv() got error %v, want %v", stream, err, nil)
+	}
+	if reply.GetAggregatedPayloadSize() != int32(sum) {
+		t.Fatalf("%v.CloseAndRecv().GetAggregatePayloadSize() = %v; want %v", stream, reply.GetAggregatedPayloadSize(), sum)
+	}
+}
+
+func TestClientStreamingError(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		if e.name == "handler-tls" {
+			continue
+		}
+		testClientStreamingError(t, e)
+	}
+}
+
+func testClientStreamingError(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.startServer(&testServer{security: e.security, earlyFail: true})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	stream, err := tc.StreamingInputCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want <nil>", tc, err)
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, 1)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req := &testpb.StreamingInputCallRequest{
+		Payload: payload,
+	}
+	// The 1st request should go through.
+	if err := stream.Send(req); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, req, err)
+	}
+	for {
+		if err := stream.Send(req); err != io.EOF {
+			continue
+		}
+		if _, err := stream.CloseAndRecv(); grpc.Code(err) != codes.NotFound {
+			t.Fatalf("%v.CloseAndRecv() = %v, want error %s", stream, err, codes.NotFound)
+		}
+		break
+	}
+}
+
+func TestExceedMaxStreamsLimit(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testExceedMaxStreamsLimit(t, e)
+	}
+}
+
+func testExceedMaxStreamsLimit(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise(
+		"http2Client.notifyError got notified that the client transport was broken",
+		"Conn.resetTransport failed to create client transport",
+		"grpc: the connection is closing",
+	)
+	te.maxStream = 1 // Only allows 1 live stream per server transport.
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	_, err := tc.StreamingInputCall(te.ctx)
+	if err != nil {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, <nil>", tc, err)
+	}
+	// Loop until receiving the new max stream setting from the server.
+	for {
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+		defer cancel()
+		_, err := tc.StreamingInputCall(ctx)
+		if err == nil {
+			time.Sleep(time.Second)
+			continue
+		}
+		if grpc.Code(err) == codes.DeadlineExceeded {
+			break
+		}
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, %s", tc, err, codes.DeadlineExceeded)
+	}
+}
+
+const defaultMaxStreamsClient = 100
+
+func TestExceedDefaultMaxStreamsLimit(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testExceedDefaultMaxStreamsLimit(t, e)
+	}
+}
+
+func testExceedDefaultMaxStreamsLimit(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise(
+		"http2Client.notifyError got notified that the client transport was broken",
+		"Conn.resetTransport failed to create client transport",
+		"grpc: the connection is closing",
+	)
+	// When masStream is set to 0 the server doesn't send a settings frame for
+	// MaxConcurrentStreams, essentially allowing infinite (math.MaxInt32) streams.
+	// In such a case, there should be a default cap on the client-side.
+	te.maxStream = 0
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+
+	// Create as many streams as a client can.
+	for i := 0; i < defaultMaxStreamsClient; i++ {
+		if _, err := tc.StreamingInputCall(te.ctx); err != nil {
+			t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, <nil>", tc, err)
+		}
+	}
+
+	// Trying to create one more should timeout.
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	_, err := tc.StreamingInputCall(ctx)
+	if err == nil || grpc.Code(err) != codes.DeadlineExceeded {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, %s", tc, err, codes.DeadlineExceeded)
+	}
+}
+
+func TestStreamsQuotaRecovery(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testStreamsQuotaRecovery(t, e)
+	}
+}
+
+func testStreamsQuotaRecovery(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise(
+		"http2Client.notifyError got notified that the client transport was broken",
+		"Conn.resetTransport failed to create client transport",
+		"grpc: the connection is closing",
+	)
+	te.maxStream = 1 // Allows 1 live stream.
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.StreamingInputCall(context.Background()); err != nil {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, <nil>", tc, err)
+	}
+	// Loop until the new max stream setting is effective.
+	for {
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+		defer cancel()
+		_, err := tc.StreamingInputCall(ctx)
+		if err == nil {
+			time.Sleep(time.Second)
+			continue
+		}
+		if grpc.Code(err) == codes.DeadlineExceeded {
+			break
+		}
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, %s", tc, err, codes.DeadlineExceeded)
+	}
+
+	var wg sync.WaitGroup
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, 314)
+			if err != nil {
+				t.Fatal(err)
+			}
+			req := &testpb.SimpleRequest{
+				ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+				ResponseSize: proto.Int32(1592),
+				Payload:      payload,
+			}
+			// No rpc should go through due to the max streams limit.
+			ctx, _ := context.WithTimeout(context.Background(), 10*time.Millisecond)
+			if _, err := tc.UnaryCall(ctx, req, grpc.FailFast(false)); grpc.Code(err) != codes.DeadlineExceeded {
+				t.Errorf("TestService/UnaryCall(_, _) = _, %v, want _, %s", err, codes.DeadlineExceeded)
+			}
+		}()
+	}
+	wg.Wait()
+}
+
+func TestCompressServerHasNoSupport(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testCompressServerHasNoSupport(t, e)
+	}
+}
+
+func testCompressServerHasNoSupport(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.serverCompression = false
+	te.clientCompression = true
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	const argSize = 271828
+	const respSize = 314159
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	if _, err := tc.UnaryCall(context.Background(), req); err == nil || grpc.Code(err) != codes.Unimplemented {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, error code %s", err, codes.Unimplemented)
+	}
+	// Streaming RPC
+	stream, err := tc.FullDuplexCall(context.Background())
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(31415),
+		},
+	}
+	payload, err = newPayload(testpb.PayloadType_COMPRESSABLE, int32(31415))
+	if err != nil {
+		t.Fatal(err)
+	}
+	sreq := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	if err := stream.Send(sreq); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, sreq, err)
+	}
+	if _, err := stream.Recv(); err == nil || grpc.Code(err) != codes.Unimplemented {
+		t.Fatalf("%v.Recv() = %v, want error code %s", stream, err, codes.Unimplemented)
+	}
+}
+
+func TestCompressOK(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testCompressOK(t, e)
+	}
+}
+
+func testCompressOK(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.serverCompression = true
+	te.clientCompression = true
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+	tc := testpb.NewTestServiceClient(te.clientConn())
+
+	// Unary call
+	const argSize = 271828
+	const respSize = 314159
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, argSize)
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.SimpleRequest{
+		ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseSize: proto.Int32(respSize),
+		Payload:      payload,
+	}
+	ctx := metadata.NewContext(context.Background(), metadata.Pairs("something", "something"))
+	if _, err := tc.UnaryCall(ctx, req); err != nil {
+		t.Fatalf("TestService/UnaryCall(_, _) = _, %v, want _, <nil>", err)
+	}
+	// Streaming RPC
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	stream, err := tc.FullDuplexCall(ctx)
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(31415),
+		},
+	}
+	payload, err = newPayload(testpb.PayloadType_COMPRESSABLE, int32(31415))
+	if err != nil {
+		t.Fatal(err)
+	}
+	sreq := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	if err := stream.Send(sreq); err != nil {
+		t.Fatalf("%v.Send(%v) = %v, want <nil>", stream, sreq, err)
+	}
+	if _, err := stream.Recv(); err != nil {
+		t.Fatalf("%v.Recv() = %v, want <nil>", stream, err)
+	}
+}
+
+func TestUnaryClientInterceptor(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testUnaryClientInterceptor(t, e)
+	}
+}
+
+func failOkayRPC(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+	err := invoker(ctx, method, req, reply, cc, opts...)
+	if err == nil {
+		return grpc.Errorf(codes.NotFound, "")
+	}
+	return err
+}
+
+func testUnaryClientInterceptor(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.userAgent = testAppUA
+	te.unaryClientInt = failOkayRPC
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.NotFound {
+		t.Fatalf("%v.EmptyCall(_, _) = _, %v, want _, error code %s", tc, err, codes.NotFound)
+	}
+}
+
+func TestStreamClientInterceptor(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testStreamClientInterceptor(t, e)
+	}
+}
+
+func failOkayStream(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
+	s, err := streamer(ctx, desc, cc, method, opts...)
+	if err == nil {
+		return nil, grpc.Errorf(codes.NotFound, "")
+	}
+	return s, nil
+}
+
+func testStreamClientInterceptor(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.streamClientInt = failOkayStream
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(int32(1)),
+		},
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	if _, err := tc.StreamingOutputCall(context.Background(), req); grpc.Code(err) != codes.NotFound {
+		t.Fatalf("%v.StreamingOutputCall(_) = _, %v, want _, error code %s", tc, err, codes.NotFound)
+	}
+}
+
+func TestUnaryServerInterceptor(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testUnaryServerInterceptor(t, e)
+	}
+}
+
+func errInjector(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return nil, grpc.Errorf(codes.PermissionDenied, "")
+}
+
+func testUnaryServerInterceptor(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.unaryServerInt = errInjector
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); grpc.Code(err) != codes.PermissionDenied {
+		t.Fatalf("%v.EmptyCall(_, _) = _, %v, want _, error code %s", tc, err, codes.PermissionDenied)
+	}
+}
+
+func TestStreamServerInterceptor(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		// TODO(bradfitz): Temporarily skip this env due to #619.
+		if e.name == "handler-tls" {
+			continue
+		}
+		testStreamServerInterceptor(t, e)
+	}
+}
+
+func fullDuplexOnly(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+	if info.FullMethod == "/grpc.testing.TestService/FullDuplexCall" {
+		return handler(srv, ss)
+	}
+	// Reject the other methods.
+	return grpc.Errorf(codes.PermissionDenied, "")
+}
+
+func testStreamServerInterceptor(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.streamServerInt = fullDuplexOnly
+	te.startServer(&testServer{security: e.security})
+	defer te.tearDown()
+
+	tc := testpb.NewTestServiceClient(te.clientConn())
+	respParam := []*testpb.ResponseParameters{
+		{
+			Size: proto.Int32(int32(1)),
+		},
+	}
+	payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(1))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := &testpb.StreamingOutputCallRequest{
+		ResponseType:       testpb.PayloadType_COMPRESSABLE.Enum(),
+		ResponseParameters: respParam,
+		Payload:            payload,
+	}
+	s1, err := tc.StreamingOutputCall(context.Background(), req)
+	if err != nil {
+		t.Fatalf("%v.StreamingOutputCall(_) = _, %v, want _, <nil>", tc, err)
+	}
+	if _, err := s1.Recv(); grpc.Code(err) != codes.PermissionDenied {
+		t.Fatalf("%v.StreamingInputCall(_) = _, %v, want _, error code %s", tc, err, codes.PermissionDenied)
+	}
+	s2, err := tc.FullDuplexCall(context.Background())
+	if err != nil {
+		t.Fatalf("%v.FullDuplexCall(_) = _, %v, want <nil>", tc, err)
+	}
+	if err := s2.Send(req); err != nil {
+		t.Fatalf("%v.Send(_) = %v, want <nil>", s2, err)
+	}
+	if _, err := s2.Recv(); err != nil {
+		t.Fatalf("%v.Recv() = _, %v, want _, <nil>", s2, err)
+	}
+}
+
+// funcServer implements methods of TestServiceServer using funcs,
+// similar to an http.HandlerFunc.
+// Any unimplemented method will crash. Tests implement the method(s)
+// they need.
+type funcServer struct {
+	testpb.TestServiceServer
+	unaryCall          func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error)
+	streamingInputCall func(stream testpb.TestService_StreamingInputCallServer) error
+}
+
+func (s *funcServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	return s.unaryCall(ctx, in)
+}
+
+func (s *funcServer) StreamingInputCall(stream testpb.TestService_StreamingInputCallServer) error {
+	return s.streamingInputCall(stream)
+}
+
+func TestClientRequestBodyErrorUnexpectedEOF(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testClientRequestBodyErrorUnexpectedEOF(t, e)
+	}
+}
+
+func testClientRequestBodyErrorUnexpectedEOF(t *testing.T, e env) {
+	te := newTest(t, e)
+	ts := &funcServer{unaryCall: func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+		errUnexpectedCall := errors.New("unexpected call func server method")
+		t.Error(errUnexpectedCall)
+		return nil, errUnexpectedCall
+	}}
+	te.startServer(ts)
+	defer te.tearDown()
+	te.withServerTester(func(st *serverTester) {
+		st.writeHeadersGRPC(1, "/grpc.testing.TestService/UnaryCall")
+		// Say we have 5 bytes coming, but set END_STREAM flag:
+		st.writeData(1, true, []byte{0, 0, 0, 0, 5})
+		st.wantAnyFrame() // wait for server to crash (it used to crash)
+	})
+}
+
+func TestClientRequestBodyErrorCloseAfterLength(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testClientRequestBodyErrorCloseAfterLength(t, e)
+	}
+}
+
+func testClientRequestBodyErrorCloseAfterLength(t *testing.T, e env) {
+	te := newTest(t, e)
+	te.declareLogNoise("Server.processUnaryRPC failed to write status")
+	ts := &funcServer{unaryCall: func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+		errUnexpectedCall := errors.New("unexpected call func server method")
+		t.Error(errUnexpectedCall)
+		return nil, errUnexpectedCall
+	}}
+	te.startServer(ts)
+	defer te.tearDown()
+	te.withServerTester(func(st *serverTester) {
+		st.writeHeadersGRPC(1, "/grpc.testing.TestService/UnaryCall")
+		// say we're sending 5 bytes, but then close the connection instead.
+		st.writeData(1, false, []byte{0, 0, 0, 0, 5})
+		st.cc.Close()
+	})
+}
+
+func TestClientRequestBodyErrorCancel(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testClientRequestBodyErrorCancel(t, e)
+	}
+}
+
+func testClientRequestBodyErrorCancel(t *testing.T, e env) {
+	te := newTest(t, e)
+	gotCall := make(chan bool, 1)
+	ts := &funcServer{unaryCall: func(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+		gotCall <- true
+		return new(testpb.SimpleResponse), nil
+	}}
+	te.startServer(ts)
+	defer te.tearDown()
+	te.withServerTester(func(st *serverTester) {
+		st.writeHeadersGRPC(1, "/grpc.testing.TestService/UnaryCall")
+		// Say we have 5 bytes coming, but cancel it instead.
+		st.writeRSTStream(1, http2.ErrCodeCancel)
+		st.writeData(1, false, []byte{0, 0, 0, 0, 5})
+
+		// Verify we didn't a call yet.
+		select {
+		case <-gotCall:
+			t.Fatal("unexpected call")
+		default:
+		}
+
+		// And now send an uncanceled (but still invalid), just to get a response.
+		st.writeHeadersGRPC(3, "/grpc.testing.TestService/UnaryCall")
+		st.writeData(3, true, []byte{0, 0, 0, 0, 0})
+		<-gotCall
+		st.wantAnyFrame()
+	})
+}
+
+func TestClientRequestBodyErrorCancelStreamingInput(t *testing.T) {
+	defer leakCheck(t)()
+	for _, e := range listTestEnv() {
+		testClientRequestBodyErrorCancelStreamingInput(t, e)
+	}
+}
+
+func testClientRequestBodyErrorCancelStreamingInput(t *testing.T, e env) {
+	te := newTest(t, e)
+	recvErr := make(chan error, 1)
+	ts := &funcServer{streamingInputCall: func(stream testpb.TestService_StreamingInputCallServer) error {
+		_, err := stream.Recv()
+		recvErr <- err
+		return nil
+	}}
+	te.startServer(ts)
+	defer te.tearDown()
+	te.withServerTester(func(st *serverTester) {
+		st.writeHeadersGRPC(1, "/grpc.testing.TestService/StreamingInputCall")
+		// Say we have 5 bytes coming, but cancel it instead.
+		st.writeData(1, false, []byte{0, 0, 0, 0, 5})
+		st.writeRSTStream(1, http2.ErrCodeCancel)
+
+		var got error
+		select {
+		case got = <-recvErr:
+		case <-time.After(3 * time.Second):
+			t.Fatal("timeout waiting for error")
+		}
+		if grpc.Code(got) != codes.Canceled {
+			t.Errorf("error = %#v; want error code %s", got, codes.Canceled)
+		}
+	})
+}
+
+const clientAlwaysFailCredErrorMsg = "clientAlwaysFailCred always fails"
+
+var errClientAlwaysFailCred = errors.New(clientAlwaysFailCredErrorMsg)
+
+type clientAlwaysFailCred struct{}
+
+func (c clientAlwaysFailCred) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	return nil, nil, errClientAlwaysFailCred
+}
+func (c clientAlwaysFailCred) ServerHandshake(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	return rawConn, nil, nil
+}
+func (c clientAlwaysFailCred) Info() credentials.ProtocolInfo {
+	return credentials.ProtocolInfo{}
+}
+func (c clientAlwaysFailCred) Clone() credentials.TransportCredentials {
+	return nil
+}
+func (c clientAlwaysFailCred) OverrideServerName(s string) error {
+	return nil
+}
+
+func TestDialWithBlockErrorOnBadCertificates(t *testing.T) {
+	te := newTest(t, env{name: "bad-cred", network: "tcp", security: "clientAlwaysFailCred", balancer: true})
+	te.startServer(&testServer{security: te.e.security})
+	defer te.tearDown()
+
+	var (
+		err  error
+		opts []grpc.DialOption
+	)
+	opts = append(opts, grpc.WithTransportCredentials(clientAlwaysFailCred{}), grpc.WithBlock())
+	te.cc, err = grpc.Dial(te.srvAddr, opts...)
+	if err != errClientAlwaysFailCred {
+		te.t.Fatalf("Dial(%q) = %v, want %v", te.srvAddr, err, errClientAlwaysFailCred)
+	}
+}
+
+func TestFailFastRPCErrorOnBadCertificates(t *testing.T) {
+	te := newTest(t, env{name: "bad-cred", network: "tcp", security: "clientAlwaysFailCred", balancer: true})
+	te.startServer(&testServer{security: te.e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); !strings.Contains(err.Error(), clientAlwaysFailCredErrorMsg) {
+		te.t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want err.Error() contains %q", err, clientAlwaysFailCredErrorMsg)
+	}
+}
+
+func TestFailFastRPCWithNoBalancerErrorOnBadCertificates(t *testing.T) {
+	te := newTest(t, env{name: "bad-cred", network: "tcp", security: "clientAlwaysFailCred", balancer: false})
+	te.startServer(&testServer{security: te.e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}); !strings.Contains(err.Error(), clientAlwaysFailCredErrorMsg) {
+		te.t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want err.Error() contains %q", err, clientAlwaysFailCredErrorMsg)
+	}
+}
+
+func TestNonFailFastRPCWithNoBalancerErrorOnBadCertificates(t *testing.T) {
+	te := newTest(t, env{name: "bad-cred", network: "tcp", security: "clientAlwaysFailCred", balancer: false})
+	te.startServer(&testServer{security: te.e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); !strings.Contains(err.Error(), clientAlwaysFailCredErrorMsg) {
+		te.t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want err.Error() contains %q", err, clientAlwaysFailCredErrorMsg)
+	}
+}
+
+type clientTimeoutCreds struct {
+	timeoutReturned bool
+}
+
+func (c *clientTimeoutCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	if !c.timeoutReturned {
+		c.timeoutReturned = true
+		return nil, nil, context.DeadlineExceeded
+	}
+	return rawConn, nil, nil
+}
+func (c *clientTimeoutCreds) ServerHandshake(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	return rawConn, nil, nil
+}
+func (c *clientTimeoutCreds) Info() credentials.ProtocolInfo {
+	return credentials.ProtocolInfo{}
+}
+func (c *clientTimeoutCreds) Clone() credentials.TransportCredentials {
+	return nil
+}
+func (c *clientTimeoutCreds) OverrideServerName(s string) error {
+	return nil
+}
+
+func TestNonFailFastRPCSucceedOnTimeoutCreds(t *testing.T) {
+	te := newTest(t, env{name: "timeout-cred", network: "tcp", security: "clientTimeoutCreds", balancer: false})
+	te.userAgent = testAppUA
+	te.startServer(&testServer{security: te.e.security})
+	defer te.tearDown()
+
+	cc := te.clientConn()
+	tc := testpb.NewTestServiceClient(cc)
+	// This unary call should succeed, because ClientHandshake will succeed for the second time.
+	if _, err := tc.EmptyCall(context.Background(), &testpb.Empty{}, grpc.FailFast(false)); err != nil {
+		te.t.Fatalf("TestService/EmptyCall(_, _) = _, %v, want <nil>", err)
+	}
+}
+
+type serverDispatchCred struct {
+	ready   chan struct{}
+	rawConn net.Conn
+}
+
+func newServerDispatchCred() *serverDispatchCred {
+	return &serverDispatchCred{
+		ready: make(chan struct{}),
+	}
+}
+func (c *serverDispatchCred) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	return rawConn, nil, nil
+}
+func (c *serverDispatchCred) ServerHandshake(rawConn net.Conn) (net.Conn, credentials.AuthInfo, error) {
+	c.rawConn = rawConn
+	close(c.ready)
+	return nil, nil, credentials.ErrConnDispatched
+}
+func (c *serverDispatchCred) Info() credentials.ProtocolInfo {
+	return credentials.ProtocolInfo{}
+}
+func (c *serverDispatchCred) Clone() credentials.TransportCredentials {
+	return nil
+}
+func (c *serverDispatchCred) OverrideServerName(s string) error {
+	return nil
+}
+func (c *serverDispatchCred) getRawConn() net.Conn {
+	<-c.ready
+	return c.rawConn
+}
+
+func TestServerCredsDispatch(t *testing.T) {
+	lis, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatalf("Failed to listen: %v", err)
+	}
+	cred := newServerDispatchCred()
+	s := grpc.NewServer(grpc.Creds(cred))
+	go s.Serve(lis)
+	defer s.Stop()
+
+	cc, err := grpc.Dial(lis.Addr().String(), grpc.WithTransportCredentials(cred))
+	if err != nil {
+		t.Fatalf("grpc.Dial(%q) = %v", lis.Addr().String(), err)
+	}
+	defer cc.Close()
+
+	// Check rawConn is not closed.
+	if n, err := cred.getRawConn().Write([]byte{0}); n <= 0 || err != nil {
+		t.Errorf("Read() = %v, %v; want n>0, <nil>", n, err)
+	}
+}
+
+func TestFlowControlLogicalRace(t *testing.T) {
+	// Test for a regression of https://github.com/grpc/grpc-go/issues/632,
+	// and other flow control bugs.
+
+	defer leakCheck(t)()
+
+	const (
+		itemCount   = 100
+		itemSize    = 1 << 10
+		recvCount   = 2
+		maxFailures = 3
+
+		requestTimeout = time.Second
+	)
+
+	requestCount := 10000
+	if raceMode {
+		requestCount = 1000
+	}
+
+	lis, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatalf("Failed to listen: %v", err)
+	}
+	defer lis.Close()
+
+	s := grpc.NewServer()
+	testpb.RegisterTestServiceServer(s, &flowControlLogicalRaceServer{
+		itemCount: itemCount,
+		itemSize:  itemSize,
+	})
+	defer s.Stop()
+
+	go s.Serve(lis)
+
+	ctx := context.Background()
+
+	cc, err := grpc.Dial(lis.Addr().String(), grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		t.Fatalf("grpc.Dial(%q) = %v", lis.Addr().String(), err)
+	}
+	defer cc.Close()
+	cl := testpb.NewTestServiceClient(cc)
+
+	failures := 0
+	for i := 0; i < requestCount; i++ {
+		ctx, cancel := context.WithTimeout(ctx, requestTimeout)
+		output, err := cl.StreamingOutputCall(ctx, &testpb.StreamingOutputCallRequest{})
+		if err != nil {
+			t.Fatalf("StreamingOutputCall; err = %q", err)
+		}
+
+		j := 0
+	loop:
+		for ; j < recvCount; j++ {
+			_, err := output.Recv()
+			if err != nil {
+				if err == io.EOF {
+					break loop
+				}
+				switch grpc.Code(err) {
+				case codes.DeadlineExceeded:
+					break loop
+				default:
+					t.Fatalf("Recv; err = %q", err)
+				}
+			}
+		}
+		cancel()
+		<-ctx.Done()
+
+		if j < recvCount {
+			t.Errorf("got %d responses to request %d", j, i)
+			failures++
+			if failures >= maxFailures {
+				// Continue past the first failure to see if the connection is
+				// entirely broken, or if only a single RPC was affected
+				break
+			}
+		}
+	}
+}
+
+type flowControlLogicalRaceServer struct {
+	testpb.TestServiceServer
+
+	itemSize  int
+	itemCount int
+}
+
+func (s *flowControlLogicalRaceServer) StreamingOutputCall(req *testpb.StreamingOutputCallRequest, srv testpb.TestService_StreamingOutputCallServer) error {
+	for i := 0; i < s.itemCount; i++ {
+		err := srv.Send(&testpb.StreamingOutputCallResponse{
+			Payload: &testpb.Payload{
+				// Sending a large stream of data which the client reject
+				// helps to trigger some types of flow control bugs.
+				//
+				// Reallocating memory here is inefficient, but the stress it
+				// puts on the GC leads to more frequent flow control
+				// failures. The GC likely causes more variety in the
+				// goroutine scheduling orders.
+				Body: bytes.Repeat([]byte("a"), s.itemSize),
+			},
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// interestingGoroutines returns all goroutines we care about for the purpose
+// of leak checking. It excludes testing or runtime ones.
+func interestingGoroutines() (gs []string) {
+	buf := make([]byte, 2<<20)
+	buf = buf[:runtime.Stack(buf, true)]
+	for _, g := range strings.Split(string(buf), "\n\n") {
+		sl := strings.SplitN(g, "\n", 2)
+		if len(sl) != 2 {
+			continue
+		}
+		stack := strings.TrimSpace(sl[1])
+		if strings.HasPrefix(stack, "testing.RunTests") {
+			continue
+		}
+
+		if stack == "" ||
+			strings.Contains(stack, "testing.Main(") ||
+			strings.Contains(stack, "testing.tRunner(") ||
+			strings.Contains(stack, "runtime.goexit") ||
+			strings.Contains(stack, "created by runtime.gc") ||
+			strings.Contains(stack, "created by runtime/trace.Start") ||
+			strings.Contains(stack, "created by google3/base/go/log.init") ||
+			strings.Contains(stack, "interestingGoroutines") ||
+			strings.Contains(stack, "runtime.MHeap_Scavenger") ||
+			strings.Contains(stack, "signal.signal_recv") ||
+			strings.Contains(stack, "sigterm.handler") ||
+			strings.Contains(stack, "runtime_mcall") ||
+			strings.Contains(stack, "goroutine in C code") {
+			continue
+		}
+		gs = append(gs, g)
+	}
+	sort.Strings(gs)
+	return
+}
+
+// leakCheck snapshots the currently-running goroutines and returns a
+// function to be run at the end of tests to see whether any
+// goroutines leaked.
+func leakCheck(t testing.TB) func() {
+	orig := map[string]bool{}
+	for _, g := range interestingGoroutines() {
+		orig[g] = true
+	}
+	return func() {
+		// Loop, waiting for goroutines to shut down.
+		// Wait up to 10 seconds, but finish as quickly as possible.
+		deadline := time.Now().Add(10 * time.Second)
+		for {
+			var leaked []string
+			for _, g := range interestingGoroutines() {
+				if !orig[g] {
+					leaked = append(leaked, g)
+				}
+			}
+			if len(leaked) == 0 {
+				return
+			}
+			if time.Now().Before(deadline) {
+				time.Sleep(50 * time.Millisecond)
+				continue
+			}
+			for _, g := range leaked {
+				t.Errorf("Leaked goroutine: %v", g)
+			}
+			return
+		}
+	}
+}
+
+type lockingWriter struct {
+	mu sync.Mutex
+	w  io.Writer
+}
+
+func (lw *lockingWriter) Write(p []byte) (n int, err error) {
+	lw.mu.Lock()
+	defer lw.mu.Unlock()
+	return lw.w.Write(p)
+}
+
+func (lw *lockingWriter) setWriter(w io.Writer) {
+	lw.mu.Lock()
+	defer lw.mu.Unlock()
+	lw.w = w
+}
+
+var testLogOutput = &lockingWriter{w: os.Stderr}
+
+// awaitNewConnLogOutput waits for any of grpc.NewConn's goroutines to
+// terminate, if they're still running. It spams logs with this
+// message.  We wait for it so our log filter is still
+// active. Otherwise the "defer restore()" at the top of various test
+// functions restores our log filter and then the goroutine spams.
+func awaitNewConnLogOutput() {
+	awaitLogOutput(50*time.Millisecond, "grpc: the client connection is closing; please retry")
+}
+
+func awaitLogOutput(maxWait time.Duration, phrase string) {
+	pb := []byte(phrase)
+
+	timer := time.NewTimer(maxWait)
+	defer timer.Stop()
+	wakeup := make(chan bool, 1)
+	for {
+		if logOutputHasContents(pb, wakeup) {
+			return
+		}
+		select {
+		case <-timer.C:
+			// Too slow. Oh well.
+			return
+		case <-wakeup:
+		}
+	}
+}
+
+func logOutputHasContents(v []byte, wakeup chan<- bool) bool {
+	testLogOutput.mu.Lock()
+	defer testLogOutput.mu.Unlock()
+	fw, ok := testLogOutput.w.(*filterWriter)
+	if !ok {
+		return false
+	}
+	fw.mu.Lock()
+	defer fw.mu.Unlock()
+	if bytes.Contains(fw.buf.Bytes(), v) {
+		return true
+	}
+	fw.wakeup = wakeup
+	return false
+}
+
+func init() {
+	grpclog.SetLogger(log.New(testLogOutput, "", log.LstdFlags))
+}
+
+var verboseLogs = flag.Bool("verbose_logs", false, "show all grpclog output, without filtering")
+
+func noop() {}
+
+// declareLogNoise declares that t is expected to emit the following noisy phrases,
+// even on success. Those phrases will be filtered from grpclog output
+// and only be shown if *verbose_logs or t ends up failing.
+// The returned restore function should be called with defer to be run
+// before the test ends.
+func declareLogNoise(t *testing.T, phrases ...string) (restore func()) {
+	if *verboseLogs {
+		return noop
+	}
+	fw := &filterWriter{dst: os.Stderr, filter: phrases}
+	testLogOutput.setWriter(fw)
+	return func() {
+		if t.Failed() {
+			fw.mu.Lock()
+			defer fw.mu.Unlock()
+			if fw.buf.Len() > 0 {
+				t.Logf("Complete log output:\n%s", fw.buf.Bytes())
+			}
+		}
+		testLogOutput.setWriter(os.Stderr)
+	}
+}
+
+type filterWriter struct {
+	dst    io.Writer
+	filter []string
+
+	mu     sync.Mutex
+	buf    bytes.Buffer
+	wakeup chan<- bool // if non-nil, gets true on write
+}
+
+func (fw *filterWriter) Write(p []byte) (n int, err error) {
+	fw.mu.Lock()
+	fw.buf.Write(p)
+	if fw.wakeup != nil {
+		select {
+		case fw.wakeup <- true:
+		default:
+		}
+	}
+	fw.mu.Unlock()
+
+	ps := string(p)
+	for _, f := range fw.filter {
+		if strings.Contains(ps, f) {
+			return len(p), nil
+		}
+	}
+	return fw.dst.Write(p)
+}
+
+func equalErrors(l, r error) bool {
+	return grpc.Code(l) == grpc.Code(r) && grpc.ErrorDesc(l) == grpc.ErrorDesc(r)
+}
diff --git a/vendor/google.golang.org/grpc/test/grpc_testing/test.pb.go b/vendor/google.golang.org/grpc/test/grpc_testing/test.pb.go
new file mode 100644
index 00000000000..e584c4d6d6b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/grpc_testing/test.pb.go
@@ -0,0 +1,788 @@
+// Code generated by protoc-gen-go.
+// source: test.proto
+// DO NOT EDIT!
+
+/*
+Package grpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	test.proto
+
+It has these top-level messages:
+	Empty
+	Payload
+	SimpleRequest
+	SimpleResponse
+	StreamingInputCallRequest
+	StreamingInputCallResponse
+	ResponseParameters
+	StreamingOutputCallRequest
+	StreamingOutputCallResponse
+*/
+package grpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The type of payload that should be returned.
+type PayloadType int32
+
+const (
+	// Compressable text format.
+	PayloadType_COMPRESSABLE PayloadType = 0
+	// Uncompressable binary format.
+	PayloadType_UNCOMPRESSABLE PayloadType = 1
+	// Randomly chosen from all other formats defined in this enum.
+	PayloadType_RANDOM PayloadType = 2
+)
+
+var PayloadType_name = map[int32]string{
+	0: "COMPRESSABLE",
+	1: "UNCOMPRESSABLE",
+	2: "RANDOM",
+}
+var PayloadType_value = map[string]int32{
+	"COMPRESSABLE":   0,
+	"UNCOMPRESSABLE": 1,
+	"RANDOM":         2,
+}
+
+func (x PayloadType) Enum() *PayloadType {
+	p := new(PayloadType)
+	*p = x
+	return p
+}
+func (x PayloadType) String() string {
+	return proto.EnumName(PayloadType_name, int32(x))
+}
+func (x *PayloadType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(PayloadType_value, data, "PayloadType")
+	if err != nil {
+		return err
+	}
+	*x = PayloadType(value)
+	return nil
+}
+func (PayloadType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+type Empty struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Empty) Reset()                    { *m = Empty{} }
+func (m *Empty) String() string            { return proto.CompactTextString(m) }
+func (*Empty) ProtoMessage()               {}
+func (*Empty) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// A block of data, to simply increase gRPC message size.
+type Payload struct {
+	// The type of data in body.
+	Type *PayloadType `protobuf:"varint,1,opt,name=type,enum=grpc.testing.PayloadType" json:"type,omitempty"`
+	// Primary contents of payload.
+	Body             []byte `protobuf:"bytes,2,opt,name=body" json:"body,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Payload) Reset()                    { *m = Payload{} }
+func (m *Payload) String() string            { return proto.CompactTextString(m) }
+func (*Payload) ProtoMessage()               {}
+func (*Payload) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *Payload) GetType() PayloadType {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *Payload) GetBody() []byte {
+	if m != nil {
+		return m.Body
+	}
+	return nil
+}
+
+// Unary request.
+type SimpleRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, server randomly chooses one from other formats.
+	ResponseType *PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Desired payload size in the response from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	ResponseSize *int32 `protobuf:"varint,2,opt,name=response_size,json=responseSize" json:"response_size,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	// Whether SimpleResponse should include username.
+	FillUsername *bool `protobuf:"varint,4,opt,name=fill_username,json=fillUsername" json:"fill_username,omitempty"`
+	// Whether SimpleResponse should include OAuth scope.
+	FillOauthScope   *bool  `protobuf:"varint,5,opt,name=fill_oauth_scope,json=fillOauthScope" json:"fill_oauth_scope,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *SimpleRequest) Reset()                    { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string            { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()               {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *SimpleRequest) GetResponseType() PayloadType {
+	if m != nil && m.ResponseType != nil {
+		return *m.ResponseType
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *SimpleRequest) GetResponseSize() int32 {
+	if m != nil && m.ResponseSize != nil {
+		return *m.ResponseSize
+	}
+	return 0
+}
+
+func (m *SimpleRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *SimpleRequest) GetFillUsername() bool {
+	if m != nil && m.FillUsername != nil {
+		return *m.FillUsername
+	}
+	return false
+}
+
+func (m *SimpleRequest) GetFillOauthScope() bool {
+	if m != nil && m.FillOauthScope != nil {
+		return *m.FillOauthScope
+	}
+	return false
+}
+
+// Unary response, as configured by the request.
+type SimpleResponse struct {
+	// Payload to increase message size.
+	Payload *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	// The user the request came from, for verifying authentication was
+	// successful when the client expected it.
+	Username *string `protobuf:"bytes,2,opt,name=username" json:"username,omitempty"`
+	// OAuth scope.
+	OauthScope       *string `protobuf:"bytes,3,opt,name=oauth_scope,json=oauthScope" json:"oauth_scope,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *SimpleResponse) Reset()                    { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string            { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()               {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *SimpleResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *SimpleResponse) GetUsername() string {
+	if m != nil && m.Username != nil {
+		return *m.Username
+	}
+	return ""
+}
+
+func (m *SimpleResponse) GetOauthScope() string {
+	if m != nil && m.OauthScope != nil {
+		return *m.OauthScope
+	}
+	return ""
+}
+
+// Client-streaming request.
+type StreamingInputCallRequest struct {
+	// Optional input payload sent along with the request.
+	Payload          *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *StreamingInputCallRequest) Reset()                    { *m = StreamingInputCallRequest{} }
+func (m *StreamingInputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallRequest) ProtoMessage()               {}
+func (*StreamingInputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+func (m *StreamingInputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// Client-streaming response.
+type StreamingInputCallResponse struct {
+	// Aggregated size of payloads received from the client.
+	AggregatedPayloadSize *int32 `protobuf:"varint,1,opt,name=aggregated_payload_size,json=aggregatedPayloadSize" json:"aggregated_payload_size,omitempty"`
+	XXX_unrecognized      []byte `json:"-"`
+}
+
+func (m *StreamingInputCallResponse) Reset()                    { *m = StreamingInputCallResponse{} }
+func (m *StreamingInputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingInputCallResponse) ProtoMessage()               {}
+func (*StreamingInputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *StreamingInputCallResponse) GetAggregatedPayloadSize() int32 {
+	if m != nil && m.AggregatedPayloadSize != nil {
+		return *m.AggregatedPayloadSize
+	}
+	return 0
+}
+
+// Configuration for a particular response.
+type ResponseParameters struct {
+	// Desired payload sizes in responses from the server.
+	// If response_type is COMPRESSABLE, this denotes the size before compression.
+	Size *int32 `protobuf:"varint,1,opt,name=size" json:"size,omitempty"`
+	// Desired interval between consecutive responses in the response stream in
+	// microseconds.
+	IntervalUs       *int32 `protobuf:"varint,2,opt,name=interval_us,json=intervalUs" json:"interval_us,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ResponseParameters) Reset()                    { *m = ResponseParameters{} }
+func (m *ResponseParameters) String() string            { return proto.CompactTextString(m) }
+func (*ResponseParameters) ProtoMessage()               {}
+func (*ResponseParameters) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *ResponseParameters) GetSize() int32 {
+	if m != nil && m.Size != nil {
+		return *m.Size
+	}
+	return 0
+}
+
+func (m *ResponseParameters) GetIntervalUs() int32 {
+	if m != nil && m.IntervalUs != nil {
+		return *m.IntervalUs
+	}
+	return 0
+}
+
+// Server-streaming request.
+type StreamingOutputCallRequest struct {
+	// Desired payload type in the response from the server.
+	// If response_type is RANDOM, the payload from each response in the stream
+	// might be of different types. This is to simulate a mixed type of payload
+	// stream.
+	ResponseType *PayloadType `protobuf:"varint,1,opt,name=response_type,json=responseType,enum=grpc.testing.PayloadType" json:"response_type,omitempty"`
+	// Configuration for each expected response message.
+	ResponseParameters []*ResponseParameters `protobuf:"bytes,2,rep,name=response_parameters,json=responseParameters" json:"response_parameters,omitempty"`
+	// Optional input payload sent along with the request.
+	Payload          *Payload `protobuf:"bytes,3,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *StreamingOutputCallRequest) Reset()                    { *m = StreamingOutputCallRequest{} }
+func (m *StreamingOutputCallRequest) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallRequest) ProtoMessage()               {}
+func (*StreamingOutputCallRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *StreamingOutputCallRequest) GetResponseType() PayloadType {
+	if m != nil && m.ResponseType != nil {
+		return *m.ResponseType
+	}
+	return PayloadType_COMPRESSABLE
+}
+
+func (m *StreamingOutputCallRequest) GetResponseParameters() []*ResponseParameters {
+	if m != nil {
+		return m.ResponseParameters
+	}
+	return nil
+}
+
+func (m *StreamingOutputCallRequest) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// Server-streaming response, as configured by the request and parameters.
+type StreamingOutputCallResponse struct {
+	// Payload to increase response size.
+	Payload          *Payload `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *StreamingOutputCallResponse) Reset()                    { *m = StreamingOutputCallResponse{} }
+func (m *StreamingOutputCallResponse) String() string            { return proto.CompactTextString(m) }
+func (*StreamingOutputCallResponse) ProtoMessage()               {}
+func (*StreamingOutputCallResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+func (m *StreamingOutputCallResponse) GetPayload() *Payload {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Empty)(nil), "grpc.testing.Empty")
+	proto.RegisterType((*Payload)(nil), "grpc.testing.Payload")
+	proto.RegisterType((*SimpleRequest)(nil), "grpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "grpc.testing.SimpleResponse")
+	proto.RegisterType((*StreamingInputCallRequest)(nil), "grpc.testing.StreamingInputCallRequest")
+	proto.RegisterType((*StreamingInputCallResponse)(nil), "grpc.testing.StreamingInputCallResponse")
+	proto.RegisterType((*ResponseParameters)(nil), "grpc.testing.ResponseParameters")
+	proto.RegisterType((*StreamingOutputCallRequest)(nil), "grpc.testing.StreamingOutputCallRequest")
+	proto.RegisterType((*StreamingOutputCallResponse)(nil), "grpc.testing.StreamingOutputCallResponse")
+	proto.RegisterEnum("grpc.testing.PayloadType", PayloadType_name, PayloadType_value)
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for TestService service
+
+type TestServiceClient interface {
+	// One empty request followed by one empty response.
+	EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error)
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error)
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error)
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error)
+}
+
+type testServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTestServiceClient(cc *grpc.ClientConn) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) EmptyCall(ctx context.Context, in *Empty, opts ...grpc.CallOption) (*Empty, error) {
+	out := new(Empty)
+	err := grpc.Invoke(ctx, "/grpc.testing.TestService/EmptyCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/grpc.testing.TestService/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *StreamingOutputCallRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[0], c.cc, "/grpc.testing.TestService/StreamingOutputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingOutputCallClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type TestService_StreamingOutputCallClient interface {
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingOutputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingOutputCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[1], c.cc, "/grpc.testing.TestService/StreamingInputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingInputCallClient{stream}
+	return x, nil
+}
+
+type TestService_StreamingInputCallClient interface {
+	Send(*StreamingInputCallRequest) error
+	CloseAndRecv() (*StreamingInputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingInputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingInputCallClient) Send(m *StreamingInputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*StreamingInputCallResponse, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(StreamingInputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) FullDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_FullDuplexCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[2], c.cc, "/grpc.testing.TestService/FullDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceFullDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_FullDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceFullDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceFullDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) HalfDuplexCall(ctx context.Context, opts ...grpc.CallOption) (TestService_HalfDuplexCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[3], c.cc, "/grpc.testing.TestService/HalfDuplexCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceHalfDuplexCallClient{stream}
+	return x, nil
+}
+
+type TestService_HalfDuplexCallClient interface {
+	Send(*StreamingOutputCallRequest) error
+	Recv() (*StreamingOutputCallResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceHalfDuplexCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceHalfDuplexCallClient) Send(m *StreamingOutputCallRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallClient) Recv() (*StreamingOutputCallResponse, error) {
+	m := new(StreamingOutputCallResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for TestService service
+
+type TestServiceServer interface {
+	// One empty request followed by one empty response.
+	EmptyCall(context.Context, *Empty) (*Empty, error)
+	// One request followed by one response.
+	// The server returns the client payload as-is.
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	// One request followed by a sequence of responses (streamed download).
+	// The server returns the payload with client desired type and sizes.
+	StreamingOutputCall(*StreamingOutputCallRequest, TestService_StreamingOutputCallServer) error
+	// A sequence of requests followed by one response (streamed upload).
+	// The server returns the aggregated size of client payload as the result.
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	// A sequence of requests with each request served by the server immediately.
+	// As one request could lead to multiple responses, this interface
+	// demonstrates the idea of full duplexing.
+	FullDuplexCall(TestService_FullDuplexCallServer) error
+	// A sequence of requests followed by a sequence of responses.
+	// The server buffers all the client requests and then serves them in order. A
+	// stream of responses are returned to the client when the server starts with
+	// first request.
+	HalfDuplexCall(TestService_HalfDuplexCallServer) error
+}
+
+func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
+	s.RegisterService(&_TestService_serviceDesc, srv)
+}
+
+func _TestService_EmptyCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).EmptyCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.TestService/EmptyCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).EmptyCall(ctx, req.(*Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.testing.TestService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(StreamingOutputCallRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+
+type TestService_StreamingOutputCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	grpc.ServerStream
+}
+
+type testServiceStreamingOutputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingOutputCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+
+type TestService_StreamingInputCallServer interface {
+	SendAndClose(*StreamingInputCallResponse) error
+	Recv() (*StreamingInputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceStreamingInputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingInputCallServer) SendAndClose(m *StreamingInputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallServer) Recv() (*StreamingInputCallRequest, error) {
+	m := new(StreamingInputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_FullDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).FullDuplexCall(&testServiceFullDuplexCallServer{stream})
+}
+
+type TestService_FullDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceFullDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceFullDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceFullDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_HalfDuplexCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).HalfDuplexCall(&testServiceHalfDuplexCallServer{stream})
+}
+
+type TestService_HalfDuplexCallServer interface {
+	Send(*StreamingOutputCallResponse) error
+	Recv() (*StreamingOutputCallRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceHalfDuplexCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceHalfDuplexCallServer) Send(m *StreamingOutputCallResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceHalfDuplexCallServer) Recv() (*StreamingOutputCallRequest, error) {
+	m := new(StreamingOutputCallRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _TestService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.testing.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "EmptyCall",
+			Handler:    _TestService_EmptyCall_Handler,
+		},
+		{
+			MethodName: "UnaryCall",
+			Handler:    _TestService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingOutputCall",
+			Handler:       _TestService_StreamingOutputCall_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "StreamingInputCall",
+			Handler:       _TestService_StreamingInputCall_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "FullDuplexCall",
+			Handler:       _TestService_FullDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "HalfDuplexCall",
+			Handler:       _TestService_HalfDuplexCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+func init() { proto.RegisterFile("test.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 567 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xbc, 0x54, 0x51, 0x6f, 0xd2, 0x50,
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+	0xd8, 0xee, 0x4c, 0x2f, 0x43, 0xa9, 0x33, 0xf7, 0xd9, 0x42, 0xef, 0x42, 0x79, 0x40, 0x16, 0x8e,
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+	0x59, 0x13, 0xe0, 0x28, 0xc1, 0xd0, 0x80, 0xba, 0x24, 0x79, 0x24, 0x62, 0x9f, 0xc6, 0xe1, 0xc4,
+	0xe3, 0xee, 0x4b, 0x92, 0xa7, 0x0a, 0xbc, 0x2f, 0x60, 0x4b, 0xa0, 0xfa, 0x77, 0x50, 0xd3, 0xd4,
+	0xb1, 0xab, 0xac, 0x23, 0x65, 0x27, 0x47, 0x1a, 0xec, 0x2f, 0xcd, 0x88, 0x88, 0x15, 0x73, 0xf9,
+	0x8e, 0x8f, 0xa0, 0x9a, 0xf5, 0x50, 0x90, 0x65, 0xf0, 0x56, 0xf3, 0xbb, 0x70, 0x64, 0xb1, 0x80,
+	0x92, 0x39, 0x97, 0xbe, 0x74, 0xfd, 0x88, 0x9d, 0x11, 0xc7, 0x49, 0x37, 0x70, 0x5b, 0x2b, 0xfa,
+	0x10, 0xb4, 0x3c, 0xb5, 0x24, 0xd9, 0x6b, 0x78, 0x40, 0x66, 0xb3, 0x80, 0xce, 0x08, 0xa3, 0xd3,
+	0x71, 0xd2, 0x13, 0xaf, 0x46, 0x91, 0xab, 0x39, 0x5c, 0x95, 0x13, 0x69, 0xb1, 0x23, 0xfd, 0x12,
+	0x30, 0xd5, 0x18, 0x90, 0x80, 0xc7, 0x62, 0x34, 0x08, 0xc5, 0x25, 0xca, 0xb4, 0xca, 0x67, 0x11,
+	0xd7, 0x76, 0x79, 0xf5, 0x0b, 0x11, 0x0b, 0x4a, 0x16, 0x0e, 0x29, 0x34, 0x0a, 0xf5, 0x9f, 0x4a,
+	0xc6, 0x61, 0x3f, 0x62, 0x1b, 0x81, 0xff, 0xf5, 0xca, 0x7d, 0x80, 0xc6, 0xb2, 0xdf, 0x5f, 0x5a,
+	0xe5, 0x3e, 0x0a, 0xfc, 0xf0, 0x4e, 0xd6, 0x55, 0xb6, 0x23, 0x99, 0x18, 0x6c, 0xc7, 0xbc, 0xed,
+	0x05, 0xd5, 0x7b, 0x70, 0x9c, 0x9b, 0xf0, 0x2f, 0xaf, 0xd7, 0xb3, 0xb7, 0x50, 0xcd, 0x04, 0xc6,
+	0x3a, 0xd4, 0xce, 0xfa, 0x57, 0x03, 0xb3, 0x63, 0x59, 0xa7, 0xef, 0xba, 0x9d, 0xfa, 0x3d, 0xbe,
+	0x08, 0x75, 0xd4, 0x5b, 0xc3, 0x14, 0x04, 0xb8, 0x6f, 0x9e, 0xf6, 0xce, 0xfb, 0x57, 0xf5, 0xbd,
+	0xf6, 0x8f, 0x22, 0x54, 0x87, 0x5c, 0xdd, 0xe2, 0x4b, 0xb0, 0x27, 0x14, 0x5f, 0x41, 0x45, 0xfe,
+	0x40, 0x84, 0x2d, 0x6c, 0xac, 0x4f, 0x97, 0x05, 0x2d, 0x0f, 0xc4, 0x0b, 0xa8, 0x8c, 0x5c, 0x12,
+	0xc4, 0x6d, 0xc7, 0xeb, 0x8c, 0xb5, 0x1f, 0x87, 0xf6, 0x30, 0xbf, 0x98, 0x1c, 0x80, 0x03, 0x8d,
+	0x9c, 0xf3, 0x41, 0x63, 0xa3, 0xe9, 0xc6, 0x4b, 0xa2, 0x3d, 0xdd, 0x81, 0x19, 0xcf, 0x7a, 0xa9,
+	0xa0, 0x0d, 0xb8, 0xfd, 0x45, 0xe0, 0x93, 0x1b, 0x24, 0x36, 0xbf, 0x40, 0xcd, 0xf8, 0x33, 0x31,
+	0x1e, 0x65, 0x88, 0x51, 0xea, 0x45, 0xe4, 0x38, 0xe7, 0x11, 0x4f, 0xfb, 0xf5, 0xbf, 0x65, 0x32,
+	0x14, 0x99, 0x4a, 0x7d, 0x4f, 0x9c, 0xeb, 0x3b, 0x18, 0xf5, 0x3b, 0x00, 0x00, 0xff, 0xff, 0x4c,
+	0x41, 0xfe, 0xb6, 0x89, 0x06, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/test/grpc_testing/test.proto b/vendor/google.golang.org/grpc/test/grpc_testing/test.proto
new file mode 100644
index 00000000000..b5bfe053789
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/grpc_testing/test.proto
@@ -0,0 +1,140 @@
+// An integration test service that covers all the method signature permutations
+// of unary/streaming requests/responses.
+syntax = "proto2";
+
+package grpc.testing;
+
+message Empty {}
+
+// The type of payload that should be returned.
+enum PayloadType {
+  // Compressable text format.
+  COMPRESSABLE = 0;
+
+  // Uncompressable binary format.
+  UNCOMPRESSABLE = 1;
+
+  // Randomly chosen from all other formats defined in this enum.
+  RANDOM = 2;
+}
+
+// A block of data, to simply increase gRPC message size.
+message Payload {
+  // The type of data in body.
+  optional PayloadType type = 1;
+  // Primary contents of payload.
+  optional bytes body = 2;
+}
+
+// Unary request.
+message SimpleRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, server randomly chooses one from other formats.
+  optional PayloadType response_type = 1;
+
+  // Desired payload size in the response from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  optional int32 response_size = 2;
+
+  // Optional input payload sent along with the request.
+  optional Payload payload = 3;
+
+  // Whether SimpleResponse should include username.
+  optional bool fill_username = 4;
+
+  // Whether SimpleResponse should include OAuth scope.
+  optional bool fill_oauth_scope = 5;
+}
+
+// Unary response, as configured by the request.
+message SimpleResponse {
+  // Payload to increase message size.
+  optional Payload payload = 1;
+
+  // The user the request came from, for verifying authentication was
+  // successful when the client expected it.
+  optional string username = 2;
+  
+  // OAuth scope.
+  optional string oauth_scope = 3;
+}
+
+// Client-streaming request.
+message StreamingInputCallRequest {
+  // Optional input payload sent along with the request.
+  optional Payload payload = 1;
+
+  // Not expecting any payload from the response.
+}
+
+// Client-streaming response.
+message StreamingInputCallResponse {
+  // Aggregated size of payloads received from the client.
+  optional int32 aggregated_payload_size = 1;
+}
+
+// Configuration for a particular response.
+message ResponseParameters {
+  // Desired payload sizes in responses from the server.
+  // If response_type is COMPRESSABLE, this denotes the size before compression.
+  optional int32 size = 1;
+
+  // Desired interval between consecutive responses in the response stream in
+  // microseconds.
+  optional int32 interval_us = 2;
+}
+
+// Server-streaming request.
+message StreamingOutputCallRequest {
+  // Desired payload type in the response from the server.
+  // If response_type is RANDOM, the payload from each response in the stream
+  // might be of different types. This is to simulate a mixed type of payload
+  // stream.
+  optional PayloadType response_type = 1;
+
+  // Configuration for each expected response message.
+  repeated ResponseParameters response_parameters = 2;
+
+  // Optional input payload sent along with the request.
+  optional Payload payload = 3;
+}
+
+// Server-streaming response, as configured by the request and parameters.
+message StreamingOutputCallResponse {
+  // Payload to increase response size.
+  optional Payload payload = 1;
+}
+
+// A simple service to test the various types of RPCs and experiment with
+// performance with various types of payload.
+service TestService {
+  // One empty request followed by one empty response.
+  rpc EmptyCall(Empty) returns (Empty);
+
+  // One request followed by one response.
+  // The server returns the client payload as-is.
+  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
+
+  // One request followed by a sequence of responses (streamed download).
+  // The server returns the payload with client desired type and sizes.
+  rpc StreamingOutputCall(StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+
+  // A sequence of requests followed by one response (streamed upload).
+  // The server returns the aggregated size of client payload as the result.
+  rpc StreamingInputCall(stream StreamingInputCallRequest)
+      returns (StreamingInputCallResponse);
+
+  // A sequence of requests with each request served by the server immediately.
+  // As one request could lead to multiple responses, this interface
+  // demonstrates the idea of full duplexing.
+  rpc FullDuplexCall(stream StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+
+  // A sequence of requests followed by a sequence of responses.
+  // The server buffers all the client requests and then serves them in order. A
+  // stream of responses are returned to the client when the server starts with
+  // first request.
+  rpc HalfDuplexCall(stream StreamingOutputCallRequest)
+      returns (stream StreamingOutputCallResponse);
+}
diff --git a/vendor/google.golang.org/grpc/test/race_test.go b/vendor/google.golang.org/grpc/test/race_test.go
new file mode 100644
index 00000000000..b3a7056c66b
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/race_test.go
@@ -0,0 +1,39 @@
+// +build race
+
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc_test
+
+func init() {
+	raceMode = true
+}
diff --git a/vendor/google.golang.org/grpc/test/servertester_test.go b/vendor/google.golang.org/grpc/test/servertester_test.go
new file mode 100644
index 00000000000..0225a8576de
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/servertester_test.go
@@ -0,0 +1,289 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package grpc_test
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"strings"
+	"testing"
+	"time"
+
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/hpack"
+)
+
+// This is a subset of http2's serverTester type.
+//
+// serverTester wraps a io.ReadWriter (acting like the underlying
+// network connection) and provides utility methods to read and write
+// http2 frames.
+//
+// NOTE(bradfitz): this could eventually be exported somewhere. Others
+// have asked for it too. For now I'm still experimenting with the
+// API and don't feel like maintaining a stable testing API.
+
+type serverTester struct {
+	cc io.ReadWriteCloser // client conn
+	t  testing.TB
+	fr *http2.Framer
+
+	// writing headers:
+	headerBuf bytes.Buffer
+	hpackEnc  *hpack.Encoder
+
+	// reading frames:
+	frc       chan http2.Frame
+	frErrc    chan error
+	readTimer *time.Timer
+}
+
+func newServerTesterFromConn(t testing.TB, cc io.ReadWriteCloser) *serverTester {
+	st := &serverTester{
+		t:      t,
+		cc:     cc,
+		frc:    make(chan http2.Frame, 1),
+		frErrc: make(chan error, 1),
+	}
+	st.hpackEnc = hpack.NewEncoder(&st.headerBuf)
+	st.fr = http2.NewFramer(cc, cc)
+	st.fr.ReadMetaHeaders = hpack.NewDecoder(4096 /*initialHeaderTableSize*/, nil)
+
+	return st
+}
+
+func (st *serverTester) readFrame() (http2.Frame, error) {
+	go func() {
+		fr, err := st.fr.ReadFrame()
+		if err != nil {
+			st.frErrc <- err
+		} else {
+			st.frc <- fr
+		}
+	}()
+	t := time.NewTimer(2 * time.Second)
+	defer t.Stop()
+	select {
+	case f := <-st.frc:
+		return f, nil
+	case err := <-st.frErrc:
+		return nil, err
+	case <-t.C:
+		return nil, errors.New("timeout waiting for frame")
+	}
+}
+
+// greet initiates the client's HTTP/2 connection into a state where
+// frames may be sent.
+func (st *serverTester) greet() {
+	st.writePreface()
+	st.writeInitialSettings()
+	st.wantSettings()
+	st.writeSettingsAck()
+	for {
+		f, err := st.readFrame()
+		if err != nil {
+			st.t.Fatal(err)
+		}
+		switch f := f.(type) {
+		case *http2.WindowUpdateFrame:
+			// grpc's transport/http2_server sends this
+			// before the settings ack. The Go http2
+			// server uses a setting instead.
+		case *http2.SettingsFrame:
+			if f.IsAck() {
+				return
+			}
+			st.t.Fatalf("during greet, got non-ACK settings frame")
+		default:
+			st.t.Fatalf("during greet, unexpected frame type %T", f)
+		}
+	}
+}
+
+func (st *serverTester) writePreface() {
+	n, err := st.cc.Write([]byte(http2.ClientPreface))
+	if err != nil {
+		st.t.Fatalf("Error writing client preface: %v", err)
+	}
+	if n != len(http2.ClientPreface) {
+		st.t.Fatalf("Writing client preface, wrote %d bytes; want %d", n, len(http2.ClientPreface))
+	}
+}
+
+func (st *serverTester) writeInitialSettings() {
+	if err := st.fr.WriteSettings(); err != nil {
+		st.t.Fatalf("Error writing initial SETTINGS frame from client to server: %v", err)
+	}
+}
+
+func (st *serverTester) writeSettingsAck() {
+	if err := st.fr.WriteSettingsAck(); err != nil {
+		st.t.Fatalf("Error writing ACK of server's SETTINGS: %v", err)
+	}
+}
+
+func (st *serverTester) wantSettings() *http2.SettingsFrame {
+	f, err := st.readFrame()
+	if err != nil {
+		st.t.Fatalf("Error while expecting a SETTINGS frame: %v", err)
+	}
+	sf, ok := f.(*http2.SettingsFrame)
+	if !ok {
+		st.t.Fatalf("got a %T; want *SettingsFrame", f)
+	}
+	return sf
+}
+
+func (st *serverTester) wantSettingsAck() {
+	f, err := st.readFrame()
+	if err != nil {
+		st.t.Fatal(err)
+	}
+	sf, ok := f.(*http2.SettingsFrame)
+	if !ok {
+		st.t.Fatalf("Wanting a settings ACK, received a %T", f)
+	}
+	if !sf.IsAck() {
+		st.t.Fatal("Settings Frame didn't have ACK set")
+	}
+}
+
+// wait for any activity from the server
+func (st *serverTester) wantAnyFrame() http2.Frame {
+	f, err := st.fr.ReadFrame()
+	if err != nil {
+		st.t.Fatal(err)
+	}
+	return f
+}
+
+func (st *serverTester) encodeHeaderField(k, v string) {
+	err := st.hpackEnc.WriteField(hpack.HeaderField{Name: k, Value: v})
+	if err != nil {
+		st.t.Fatalf("HPACK encoding error for %q/%q: %v", k, v, err)
+	}
+}
+
+// encodeHeader encodes headers and returns their HPACK bytes. headers
+// must contain an even number of key/value pairs.  There may be
+// multiple pairs for keys (e.g. "cookie").  The :method, :path, and
+// :scheme headers default to GET, / and https.
+func (st *serverTester) encodeHeader(headers ...string) []byte {
+	if len(headers)%2 == 1 {
+		panic("odd number of kv args")
+	}
+
+	st.headerBuf.Reset()
+
+	if len(headers) == 0 {
+		// Fast path, mostly for benchmarks, so test code doesn't pollute
+		// profiles when we're looking to improve server allocations.
+		st.encodeHeaderField(":method", "GET")
+		st.encodeHeaderField(":path", "/")
+		st.encodeHeaderField(":scheme", "https")
+		return st.headerBuf.Bytes()
+	}
+
+	if len(headers) == 2 && headers[0] == ":method" {
+		// Another fast path for benchmarks.
+		st.encodeHeaderField(":method", headers[1])
+		st.encodeHeaderField(":path", "/")
+		st.encodeHeaderField(":scheme", "https")
+		return st.headerBuf.Bytes()
+	}
+
+	pseudoCount := map[string]int{}
+	keys := []string{":method", ":path", ":scheme"}
+	vals := map[string][]string{
+		":method": {"GET"},
+		":path":   {"/"},
+		":scheme": {"https"},
+	}
+	for len(headers) > 0 {
+		k, v := headers[0], headers[1]
+		headers = headers[2:]
+		if _, ok := vals[k]; !ok {
+			keys = append(keys, k)
+		}
+		if strings.HasPrefix(k, ":") {
+			pseudoCount[k]++
+			if pseudoCount[k] == 1 {
+				vals[k] = []string{v}
+			} else {
+				// Allows testing of invalid headers w/ dup pseudo fields.
+				vals[k] = append(vals[k], v)
+			}
+		} else {
+			vals[k] = append(vals[k], v)
+		}
+	}
+	for _, k := range keys {
+		for _, v := range vals[k] {
+			st.encodeHeaderField(k, v)
+		}
+	}
+	return st.headerBuf.Bytes()
+}
+
+func (st *serverTester) writeHeadersGRPC(streamID uint32, path string) {
+	st.writeHeaders(http2.HeadersFrameParam{
+		StreamID: streamID,
+		BlockFragment: st.encodeHeader(
+			":method", "POST",
+			":path", path,
+			"content-type", "application/grpc",
+			"te", "trailers",
+		),
+		EndStream:  false,
+		EndHeaders: true,
+	})
+}
+
+func (st *serverTester) writeHeaders(p http2.HeadersFrameParam) {
+	if err := st.fr.WriteHeaders(p); err != nil {
+		st.t.Fatalf("Error writing HEADERS: %v", err)
+	}
+}
+
+func (st *serverTester) writeData(streamID uint32, endStream bool, data []byte) {
+	if err := st.fr.WriteData(streamID, endStream, data); err != nil {
+		st.t.Fatalf("Error writing DATA: %v", err)
+	}
+}
+
+func (st *serverTester) writeRSTStream(streamID uint32, code http2.ErrCode) {
+	if err := st.fr.WriteRSTStream(streamID, code); err != nil {
+		st.t.Fatalf("Error writing RST_STREAM: %v", err)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/test/testdata/ca.pem b/vendor/google.golang.org/grpc/test/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/test/testdata/server1.key b/vendor/google.golang.org/grpc/test/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/test/testdata/server1.pem b/vendor/google.golang.org/grpc/test/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/test/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET
+MBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0cyBQ
+dHkgTHRkMQ8wDQYDVQQDEwZ0ZXN0Y2EwHhcNMTUxMTA0MDIyMDI0WhcNMjUxMTAx
+MDIyMDI0WjBlMQswCQYDVQQGEwJVUzERMA8GA1UECBMISWxsaW5vaXMxEDAOBgNV
+BAcTB0NoaWNhZ28xFTATBgNVBAoTDEV4YW1wbGUsIENvLjEaMBgGA1UEAxQRKi50
+ZXN0Lmdvb2dsZS5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAOHDFSco
+LCVJpYDDM4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1Bg
+zkWF+slf3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd
+9N8YwbBYAckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAGjazBpMAkGA1UdEwQCMAAw
+CwYDVR0PBAQDAgXgME8GA1UdEQRIMEaCECoudGVzdC5nb29nbGUuZnKCGHdhdGVy
+em9vaS50ZXN0Lmdvb2dsZS5iZYISKi50ZXN0LnlvdXR1YmUuY29thwTAqAEDMA0G
+CSqGSIb3DQEBCwUAA4GBAJFXVifQNub1LUP4JlnX5lXNlo8FxZ2a12AFQs+bzoJ6
+hM044EDjqyxUqSbVePK0ni3w1fHQB5rY9yYC5f8G7aqqTY1QOhoUk8ZTSTRpnkTh
+y4jjdvTZeLDVBlueZUTDRmy2feY5aZIU18vFDK08dTG0A87pppuv1LNIR3loveU8
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/testdata/ca.pem b/vendor/google.golang.org/grpc/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----
+MIICSjCCAbOgAwIBAgIJAJHGGR4dGioHMA0GCSqGSIb3DQEBCwUAMFYxCzAJBgNV
+BAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBX
+aWRnaXRzIFB0eSBMdGQxDzANBgNVBAMTBnRlc3RjYTAeFw0xNDExMTEyMjMxMjla
+Fw0yNDExMDgyMjMxMjlaMFYxCzAJBgNVBAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0
+YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxDzANBgNVBAMT
+BnRlc3RjYTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAwEDfBV5MYdlHVHJ7
++L4nxrZy7mBfAVXpOc5vMYztssUI7mL2/iYujiIXM+weZYNTEpLdjyJdu7R5gGUu
+g1jSVK/EPHfc74O7AyZU34PNIP4Sh33N+/A5YexrNgJlPY+E3GdVYi4ldWJjgkAd
+Qah2PH5ACLrIIC6tRka9hcaBlIECAwEAAaMgMB4wDAYDVR0TBAUwAwEB/zAOBgNV
+HQ8BAf8EBAMCAgQwDQYJKoZIhvcNAQELBQADgYEAHzC7jdYlzAVmddi/gdAeKPau
+sPBG/C2HCWqHzpCUHcKuvMzDVkY/MP2o6JIW2DBbY64bO/FceExhjcykgaYtCH/m
+oIU63+CFOTtR7otyQAWHqXa7q4SbCDlG7DyRFxqG0txPtGvy12lgldA2+RgcigQG
+Dfcog5wrJytaQ6UA0wE=
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/testdata/server1.key b/vendor/google.golang.org/grpc/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----
+MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBAOHDFScoLCVJpYDD
+M4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1BgzkWF+slf
+3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd9N8YwbBY
+AckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAECgYAn7qGnM2vbjJNBm0VZCkOkTIWm
+V10okw7EPJrdL2mkre9NasghNXbE1y5zDshx5Nt3KsazKOxTT8d0Jwh/3KbaN+YY
+tTCbKGW0pXDRBhwUHRcuRzScjli8Rih5UOCiZkhefUTcRb6xIhZJuQy71tjaSy0p
+dHZRmYyBYO2YEQ8xoQJBAPrJPhMBkzmEYFtyIEqAxQ/o/A6E+E4w8i+KM7nQCK7q
+K4JXzyXVAjLfyBZWHGM2uro/fjqPggGD6QH1qXCkI4MCQQDmdKeb2TrKRh5BY1LR
+81aJGKcJ2XbcDu6wMZK4oqWbTX2KiYn9GB0woM6nSr/Y6iy1u145YzYxEV/iMwff
+DJULAkB8B2MnyzOg0pNFJqBJuH29bKCcHa8gHJzqXhNO5lAlEbMK95p/P2Wi+4Hd
+aiEIAF1BF326QJcvYKmwSmrORp85AkAlSNxRJ50OWrfMZnBgzVjDx3xG6KsFQVk2
+ol6VhqL6dFgKUORFUWBvnKSyhjJxurlPEahV6oo6+A+mPhFY8eUvAkAZQyTdupP3
+XEFQKctGz+9+gKkemDp7LBBMEMBXrGTLPhpEfcjv/7KPdnFHYmhYeBTBnuVmTVWe
+F98XJ7tIFfJq
+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/testdata/server1.pem b/vendor/google.golang.org/grpc/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/trace.go b/vendor/google.golang.org/grpc/trace.go
new file mode 100644
index 00000000000..f6747e1dfa4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/trace.go
@@ -0,0 +1,119 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net"
+	"strings"
+	"time"
+
+	"golang.org/x/net/trace"
+)
+
+// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package.
+// This should only be set before any RPCs are sent or received by this program.
+var EnableTracing = true
+
+// methodFamily returns the trace family for the given method.
+// It turns "/pkg.Service/GetFoo" into "pkg.Service".
+func methodFamily(m string) string {
+	m = strings.TrimPrefix(m, "/") // remove leading slash
+	if i := strings.Index(m, "/"); i >= 0 {
+		m = m[:i] // remove everything from second slash
+	}
+	if i := strings.LastIndex(m, "."); i >= 0 {
+		m = m[i+1:] // cut down to last dotted component
+	}
+	return m
+}
+
+// traceInfo contains tracing information for an RPC.
+type traceInfo struct {
+	tr        trace.Trace
+	firstLine firstLine
+}
+
+// firstLine is the first line of an RPC trace.
+type firstLine struct {
+	client     bool // whether this is a client (outgoing) RPC
+	remoteAddr net.Addr
+	deadline   time.Duration // may be zero
+}
+
+func (f *firstLine) String() string {
+	var line bytes.Buffer
+	io.WriteString(&line, "RPC: ")
+	if f.client {
+		io.WriteString(&line, "to")
+	} else {
+		io.WriteString(&line, "from")
+	}
+	fmt.Fprintf(&line, " %v deadline:", f.remoteAddr)
+	if f.deadline != 0 {
+		fmt.Fprint(&line, f.deadline)
+	} else {
+		io.WriteString(&line, "none")
+	}
+	return line.String()
+}
+
+// payload represents an RPC request or response payload.
+type payload struct {
+	sent bool        // whether this is an outgoing payload
+	msg  interface{} // e.g. a proto.Message
+	// TODO(dsymonds): add stringifying info to codec, and limit how much we hold here?
+}
+
+func (p payload) String() string {
+	if p.sent {
+		return fmt.Sprintf("sent: %v", p.msg)
+	}
+	return fmt.Sprintf("recv: %v", p.msg)
+}
+
+type fmtStringer struct {
+	format string
+	a      []interface{}
+}
+
+func (f *fmtStringer) String() string {
+	return fmt.Sprintf(f.format, f.a...)
+}
+
+type stringer string
+
+func (s stringer) String() string { return string(s) }
diff --git a/vendor/google.golang.org/grpc/transport/control.go b/vendor/google.golang.org/grpc/transport/control.go
new file mode 100644
index 00000000000..9f63a06959f
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/control.go
@@ -0,0 +1,204 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"fmt"
+	"math"
+	"sync"
+	"time"
+
+	"golang.org/x/net/http2"
+)
+
+const (
+	// The default value of flow control window size in HTTP2 spec.
+	defaultWindowSize = 65535
+	// The initial window size for flow control.
+	initialWindowSize             = defaultWindowSize * 32      // for an RPC
+	initialConnWindowSize         = defaultWindowSize * 16 * 32 // for a connection
+	infinity                      = time.Duration(math.MaxInt64)
+	defaultClientKeepaliveTime    = infinity
+	defaultClientKeepaliveTimeout = time.Duration(20 * time.Second)
+	defaultMaxStreamsClient       = 100
+	defaultMaxConnectionIdle      = infinity
+	defaultMaxConnectionAge       = infinity
+	defaultMaxConnectionAgeGrace  = infinity
+	defaultServerKeepaliveTime    = time.Duration(2 * time.Hour)
+	defaultServerKeepaliveTimeout = time.Duration(20 * time.Second)
+)
+
+// The following defines various control items which could flow through
+// the control buffer of transport. They represent different aspects of
+// control tasks, e.g., flow control, settings, streaming resetting, etc.
+type windowUpdate struct {
+	streamID  uint32
+	increment uint32
+}
+
+func (*windowUpdate) item() {}
+
+type settings struct {
+	ack bool
+	ss  []http2.Setting
+}
+
+func (*settings) item() {}
+
+type resetStream struct {
+	streamID uint32
+	code     http2.ErrCode
+}
+
+func (*resetStream) item() {}
+
+type goAway struct {
+}
+
+func (*goAway) item() {}
+
+type flushIO struct {
+}
+
+func (*flushIO) item() {}
+
+type ping struct {
+	ack  bool
+	data [8]byte
+}
+
+func (*ping) item() {}
+
+// quotaPool is a pool which accumulates the quota and sends it to acquire()
+// when it is available.
+type quotaPool struct {
+	c chan int
+
+	mu    sync.Mutex
+	quota int
+}
+
+// newQuotaPool creates a quotaPool which has quota q available to consume.
+func newQuotaPool(q int) *quotaPool {
+	qb := &quotaPool{
+		c: make(chan int, 1),
+	}
+	if q > 0 {
+		qb.c <- q
+	} else {
+		qb.quota = q
+	}
+	return qb
+}
+
+// add cancels the pending quota sent on acquired, incremented by v and sends
+// it back on acquire.
+func (qb *quotaPool) add(v int) {
+	qb.mu.Lock()
+	defer qb.mu.Unlock()
+	select {
+	case n := <-qb.c:
+		qb.quota += n
+	default:
+	}
+	qb.quota += v
+	if qb.quota <= 0 {
+		return
+	}
+	// After the pool has been created, this is the only place that sends on
+	// the channel. Since mu is held at this point and any quota that was sent
+	// on the channel has been retrieved, we know that this code will always
+	// place any positive quota value on the channel.
+	select {
+	case qb.c <- qb.quota:
+		qb.quota = 0
+	default:
+	}
+}
+
+// acquire returns the channel on which available quota amounts are sent.
+func (qb *quotaPool) acquire() <-chan int {
+	return qb.c
+}
+
+// inFlow deals with inbound flow control
+type inFlow struct {
+	// The inbound flow control limit for pending data.
+	limit uint32
+
+	mu sync.Mutex
+	// pendingData is the overall data which have been received but not been
+	// consumed by applications.
+	pendingData uint32
+	// The amount of data the application has consumed but grpc has not sent
+	// window update for them. Used to reduce window update frequency.
+	pendingUpdate uint32
+}
+
+// onData is invoked when some data frame is received. It updates pendingData.
+func (f *inFlow) onData(n uint32) error {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	f.pendingData += n
+	if f.pendingData+f.pendingUpdate > f.limit {
+		return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", f.pendingData+f.pendingUpdate, f.limit)
+	}
+	return nil
+}
+
+// onRead is invoked when the application reads the data. It returns the window size
+// to be sent to the peer.
+func (f *inFlow) onRead(n uint32) uint32 {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	if f.pendingData == 0 {
+		return 0
+	}
+	f.pendingData -= n
+	f.pendingUpdate += n
+	if f.pendingUpdate >= f.limit/4 {
+		wu := f.pendingUpdate
+		f.pendingUpdate = 0
+		return wu
+	}
+	return 0
+}
+
+func (f *inFlow) resetPendingData() uint32 {
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	n := f.pendingData
+	f.pendingData = 0
+	return n
+}
diff --git a/vendor/google.golang.org/grpc/transport/go16.go b/vendor/google.golang.org/grpc/transport/go16.go
new file mode 100644
index 00000000000..ee1c46bad57
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/go16.go
@@ -0,0 +1,46 @@
+// +build go1.6,!go1.7
+
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
+}
diff --git a/vendor/google.golang.org/grpc/transport/go17.go b/vendor/google.golang.org/grpc/transport/go17.go
new file mode 100644
index 00000000000..356f13ff197
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/go17.go
@@ -0,0 +1,46 @@
+// +build go1.7
+
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+
+	"golang.org/x/net/context"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	return (&net.Dialer{}).DialContext(ctx, network, address)
+}
diff --git a/vendor/google.golang.org/grpc/transport/handler_server.go b/vendor/google.golang.org/grpc/transport/handler_server.go
new file mode 100644
index 00000000000..10b6dc0b19d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/handler_server.go
@@ -0,0 +1,397 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+// This file is the implementation of a gRPC server using HTTP/2 which
+// uses the standard Go http2 Server implementation (via the
+// http.Handler interface), rather than speaking low-level HTTP/2
+// frames itself. It is the implementation of *grpc.Server.ServeHTTP.
+
+package transport
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+)
+
+// NewServerHandlerTransport returns a ServerTransport handling gRPC
+// from inside an http.Handler. It requires that the http Server
+// supports HTTP/2.
+func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTransport, error) {
+	if r.ProtoMajor != 2 {
+		return nil, errors.New("gRPC requires HTTP/2")
+	}
+	if r.Method != "POST" {
+		return nil, errors.New("invalid gRPC request method")
+	}
+	if !validContentType(r.Header.Get("Content-Type")) {
+		return nil, errors.New("invalid gRPC request content-type")
+	}
+	if _, ok := w.(http.Flusher); !ok {
+		return nil, errors.New("gRPC requires a ResponseWriter supporting http.Flusher")
+	}
+	if _, ok := w.(http.CloseNotifier); !ok {
+		return nil, errors.New("gRPC requires a ResponseWriter supporting http.CloseNotifier")
+	}
+
+	st := &serverHandlerTransport{
+		rw:       w,
+		req:      r,
+		closedCh: make(chan struct{}),
+		writes:   make(chan func()),
+	}
+
+	if v := r.Header.Get("grpc-timeout"); v != "" {
+		to, err := decodeTimeout(v)
+		if err != nil {
+			return nil, streamErrorf(codes.Internal, "malformed time-out: %v", err)
+		}
+		st.timeoutSet = true
+		st.timeout = to
+	}
+
+	var metakv []string
+	if r.Host != "" {
+		metakv = append(metakv, ":authority", r.Host)
+	}
+	for k, vv := range r.Header {
+		k = strings.ToLower(k)
+		if isReservedHeader(k) && !isWhitelistedPseudoHeader(k) {
+			continue
+		}
+		for _, v := range vv {
+			if k == "user-agent" {
+				// user-agent is special. Copying logic of http_util.go.
+				if i := strings.LastIndex(v, " "); i == -1 {
+					// There is no application user agent string being set
+					continue
+				} else {
+					v = v[:i]
+				}
+			}
+			metakv = append(metakv, k, v)
+		}
+	}
+	st.headerMD = metadata.Pairs(metakv...)
+
+	return st, nil
+}
+
+// serverHandlerTransport is an implementation of ServerTransport
+// which replies to exactly one gRPC request (exactly one HTTP request),
+// using the net/http.Handler interface. This http.Handler is guaranteed
+// at this point to be speaking over HTTP/2, so it's able to speak valid
+// gRPC.
+type serverHandlerTransport struct {
+	rw               http.ResponseWriter
+	req              *http.Request
+	timeoutSet       bool
+	timeout          time.Duration
+	didCommonHeaders bool
+
+	headerMD metadata.MD
+
+	closeOnce sync.Once
+	closedCh  chan struct{} // closed on Close
+
+	// writes is a channel of code to run serialized in the
+	// ServeHTTP (HandleStreams) goroutine. The channel is closed
+	// when WriteStatus is called.
+	writes chan func()
+}
+
+func (ht *serverHandlerTransport) Close() error {
+	ht.closeOnce.Do(ht.closeCloseChanOnce)
+	return nil
+}
+
+func (ht *serverHandlerTransport) closeCloseChanOnce() { close(ht.closedCh) }
+
+func (ht *serverHandlerTransport) RemoteAddr() net.Addr { return strAddr(ht.req.RemoteAddr) }
+
+// strAddr is a net.Addr backed by either a TCP "ip:port" string, or
+// the empty string if unknown.
+type strAddr string
+
+func (a strAddr) Network() string {
+	if a != "" {
+		// Per the documentation on net/http.Request.RemoteAddr, if this is
+		// set, it's set to the IP:port of the peer (hence, TCP):
+		// https://golang.org/pkg/net/http/#Request
+		//
+		// If we want to support Unix sockets later, we can
+		// add our own grpc-specific convention within the
+		// grpc codebase to set RemoteAddr to a different
+		// format, or probably better: we can attach it to the
+		// context and use that from serverHandlerTransport.RemoteAddr.
+		return "tcp"
+	}
+	return ""
+}
+
+func (a strAddr) String() string { return string(a) }
+
+// do runs fn in the ServeHTTP goroutine.
+func (ht *serverHandlerTransport) do(fn func()) error {
+	select {
+	case ht.writes <- fn:
+		return nil
+	case <-ht.closedCh:
+		return ErrConnClosing
+	}
+}
+
+func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error {
+	err := ht.do(func() {
+		ht.writeCommonHeaders(s)
+
+		// And flush, in case no header or body has been sent yet.
+		// This forces a separation of headers and trailers if this is the
+		// first call (for example, in end2end tests's TestNoService).
+		ht.rw.(http.Flusher).Flush()
+
+		h := ht.rw.Header()
+		h.Set("Grpc-Status", fmt.Sprintf("%d", statusCode))
+		if statusDesc != "" {
+			h.Set("Grpc-Message", encodeGrpcMessage(statusDesc))
+		}
+		if md := s.Trailer(); len(md) > 0 {
+			for k, vv := range md {
+				// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
+				if isReservedHeader(k) {
+					continue
+				}
+				for _, v := range vv {
+					// http2 ResponseWriter mechanism to
+					// send undeclared Trailers after the
+					// headers have possibly been written.
+					h.Add(http2.TrailerPrefix+k, v)
+				}
+			}
+		}
+	})
+	close(ht.writes)
+	return err
+}
+
+// writeCommonHeaders sets common headers on the first write
+// call (Write, WriteHeader, or WriteStatus).
+func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
+	if ht.didCommonHeaders {
+		return
+	}
+	ht.didCommonHeaders = true
+
+	h := ht.rw.Header()
+	h["Date"] = nil // suppress Date to make tests happy; TODO: restore
+	h.Set("Content-Type", "application/grpc")
+
+	// Predeclare trailers we'll set later in WriteStatus (after the body).
+	// This is a SHOULD in the HTTP RFC, and the way you add (known)
+	// Trailers per the net/http.ResponseWriter contract.
+	// See https://golang.org/pkg/net/http/#ResponseWriter
+	// and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers
+	h.Add("Trailer", "Grpc-Status")
+	h.Add("Trailer", "Grpc-Message")
+
+	if s.sendCompress != "" {
+		h.Set("Grpc-Encoding", s.sendCompress)
+	}
+}
+
+func (ht *serverHandlerTransport) Write(s *Stream, data []byte, opts *Options) error {
+	return ht.do(func() {
+		ht.writeCommonHeaders(s)
+		ht.rw.Write(data)
+		if !opts.Delay {
+			ht.rw.(http.Flusher).Flush()
+		}
+	})
+}
+
+func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error {
+	return ht.do(func() {
+		ht.writeCommonHeaders(s)
+		h := ht.rw.Header()
+		for k, vv := range md {
+			// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
+			if isReservedHeader(k) {
+				continue
+			}
+			for _, v := range vv {
+				h.Add(k, v)
+			}
+		}
+		ht.rw.WriteHeader(200)
+		ht.rw.(http.Flusher).Flush()
+	})
+}
+
+func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), traceCtx func(context.Context, string) context.Context) {
+	// With this transport type there will be exactly 1 stream: this HTTP request.
+
+	var ctx context.Context
+	var cancel context.CancelFunc
+	if ht.timeoutSet {
+		ctx, cancel = context.WithTimeout(context.Background(), ht.timeout)
+	} else {
+		ctx, cancel = context.WithCancel(context.Background())
+	}
+
+	// requestOver is closed when either the request's context is done
+	// or the status has been written via WriteStatus.
+	requestOver := make(chan struct{})
+
+	// clientGone receives a single value if peer is gone, either
+	// because the underlying connection is dead or because the
+	// peer sends an http2 RST_STREAM.
+	clientGone := ht.rw.(http.CloseNotifier).CloseNotify()
+	go func() {
+		select {
+		case <-requestOver:
+			return
+		case <-ht.closedCh:
+		case <-clientGone:
+		}
+		cancel()
+	}()
+
+	req := ht.req
+
+	s := &Stream{
+		id:            0,            // irrelevant
+		windowHandler: func(int) {}, // nothing
+		cancel:        cancel,
+		buf:           newRecvBuffer(),
+		st:            ht,
+		method:        req.URL.Path,
+		recvCompress:  req.Header.Get("grpc-encoding"),
+	}
+	pr := &peer.Peer{
+		Addr: ht.RemoteAddr(),
+	}
+	if req.TLS != nil {
+		pr.AuthInfo = credentials.TLSInfo{State: *req.TLS}
+	}
+	ctx = metadata.NewContext(ctx, ht.headerMD)
+	ctx = peer.NewContext(ctx, pr)
+	s.ctx = newContextWithStream(ctx, s)
+	s.dec = &recvBufferReader{ctx: s.ctx, recv: s.buf}
+
+	// readerDone is closed when the Body.Read-ing goroutine exits.
+	readerDone := make(chan struct{})
+	go func() {
+		defer close(readerDone)
+
+		// TODO: minimize garbage, optimize recvBuffer code/ownership
+		const readSize = 8196
+		for buf := make([]byte, readSize); ; {
+			n, err := req.Body.Read(buf)
+			if n > 0 {
+				s.buf.put(&recvMsg{data: buf[:n:n]})
+				buf = buf[n:]
+			}
+			if err != nil {
+				s.buf.put(&recvMsg{err: mapRecvMsgError(err)})
+				return
+			}
+			if len(buf) == 0 {
+				buf = make([]byte, readSize)
+			}
+		}
+	}()
+
+	// startStream is provided by the *grpc.Server's serveStreams.
+	// It starts a goroutine serving s and exits immediately.
+	// The goroutine that is started is the one that then calls
+	// into ht, calling WriteHeader, Write, WriteStatus, Close, etc.
+	startStream(s)
+
+	ht.runStream()
+	close(requestOver)
+
+	// Wait for reading goroutine to finish.
+	req.Body.Close()
+	<-readerDone
+}
+
+func (ht *serverHandlerTransport) runStream() {
+	for {
+		select {
+		case fn, ok := <-ht.writes:
+			if !ok {
+				return
+			}
+			fn()
+		case <-ht.closedCh:
+			return
+		}
+	}
+}
+
+func (ht *serverHandlerTransport) Drain() {
+	panic("Drain() is not implemented")
+}
+
+// mapRecvMsgError returns the non-nil err into the appropriate
+// error value as expected by callers of *grpc.parser.recvMsg.
+// In particular, in can only be:
+//   * io.EOF
+//   * io.ErrUnexpectedEOF
+//   * of type transport.ConnectionError
+//   * of type transport.StreamError
+func mapRecvMsgError(err error) error {
+	if err == io.EOF || err == io.ErrUnexpectedEOF {
+		return err
+	}
+	if se, ok := err.(http2.StreamError); ok {
+		if code, ok := http2ErrConvTab[se.Code]; ok {
+			return StreamError{
+				Code: code,
+				Desc: se.Error(),
+			}
+		}
+	}
+	return connectionErrorf(true, err, err.Error())
+}
diff --git a/vendor/google.golang.org/grpc/transport/handler_server_test.go b/vendor/google.golang.org/grpc/transport/handler_server_test.go
new file mode 100644
index 00000000000..44adf2eed86
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/handler_server_test.go
@@ -0,0 +1,398 @@
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"reflect"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+)
+
+func TestHandlerTransport_NewServerHandlerTransport(t *testing.T) {
+	type testCase struct {
+		name    string
+		req     *http.Request
+		wantErr string
+		modrw   func(http.ResponseWriter) http.ResponseWriter
+		check   func(*serverHandlerTransport, *testCase) error
+	}
+	tests := []testCase{
+		{
+			name: "http/1.1",
+			req: &http.Request{
+				ProtoMajor: 1,
+				ProtoMinor: 1,
+			},
+			wantErr: "gRPC requires HTTP/2",
+		},
+		{
+			name: "bad method",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "GET",
+				Header:     http.Header{},
+				RequestURI: "/",
+			},
+			wantErr: "invalid gRPC request method",
+		},
+		{
+			name: "bad content type",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": {"application/foo"},
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			wantErr: "invalid gRPC request content-type",
+		},
+		{
+			name: "not flusher",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": {"application/grpc"},
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			modrw: func(w http.ResponseWriter) http.ResponseWriter {
+				// Return w without its Flush method
+				type onlyCloseNotifier interface {
+					http.ResponseWriter
+					http.CloseNotifier
+				}
+				return struct{ onlyCloseNotifier }{w.(onlyCloseNotifier)}
+			},
+			wantErr: "gRPC requires a ResponseWriter supporting http.Flusher",
+		},
+		{
+			name: "not closenotifier",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": {"application/grpc"},
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			modrw: func(w http.ResponseWriter) http.ResponseWriter {
+				// Return w without its CloseNotify method
+				type onlyFlusher interface {
+					http.ResponseWriter
+					http.Flusher
+				}
+				return struct{ onlyFlusher }{w.(onlyFlusher)}
+			},
+			wantErr: "gRPC requires a ResponseWriter supporting http.CloseNotifier",
+		},
+		{
+			name: "valid",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": {"application/grpc"},
+				},
+				URL: &url.URL{
+					Path: "/service/foo.bar",
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			check: func(t *serverHandlerTransport, tt *testCase) error {
+				if t.req != tt.req {
+					return fmt.Errorf("t.req = %p; want %p", t.req, tt.req)
+				}
+				if t.rw == nil {
+					return errors.New("t.rw = nil; want non-nil")
+				}
+				return nil
+			},
+		},
+		{
+			name: "with timeout",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": []string{"application/grpc"},
+					"Grpc-Timeout": {"200m"},
+				},
+				URL: &url.URL{
+					Path: "/service/foo.bar",
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			check: func(t *serverHandlerTransport, tt *testCase) error {
+				if !t.timeoutSet {
+					return errors.New("timeout not set")
+				}
+				if want := 200 * time.Millisecond; t.timeout != want {
+					return fmt.Errorf("timeout = %v; want %v", t.timeout, want)
+				}
+				return nil
+			},
+		},
+		{
+			name: "with bad timeout",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": []string{"application/grpc"},
+					"Grpc-Timeout": {"tomorrow"},
+				},
+				URL: &url.URL{
+					Path: "/service/foo.bar",
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			wantErr: `stream error: code = Internal desc = "malformed time-out: transport: timeout unit is not recognized: \"tomorrow\""`,
+		},
+		{
+			name: "with metadata",
+			req: &http.Request{
+				ProtoMajor: 2,
+				Method:     "POST",
+				Header: http.Header{
+					"Content-Type": []string{"application/grpc"},
+					"meta-foo":     {"foo-val"},
+					"meta-bar":     {"bar-val1", "bar-val2"},
+					"user-agent":   {"x/y a/b"},
+				},
+				URL: &url.URL{
+					Path: "/service/foo.bar",
+				},
+				RequestURI: "/service/foo.bar",
+			},
+			check: func(ht *serverHandlerTransport, tt *testCase) error {
+				want := metadata.MD{
+					"meta-bar":   {"bar-val1", "bar-val2"},
+					"user-agent": {"x/y"},
+					"meta-foo":   {"foo-val"},
+				}
+				if !reflect.DeepEqual(ht.headerMD, want) {
+					return fmt.Errorf("metdata = %#v; want %#v", ht.headerMD, want)
+				}
+				return nil
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		rw := newTestHandlerResponseWriter()
+		if tt.modrw != nil {
+			rw = tt.modrw(rw)
+		}
+		got, gotErr := NewServerHandlerTransport(rw, tt.req)
+		if (gotErr != nil) != (tt.wantErr != "") || (gotErr != nil && gotErr.Error() != tt.wantErr) {
+			t.Errorf("%s: error = %v; want %q", tt.name, gotErr, tt.wantErr)
+			continue
+		}
+		if gotErr != nil {
+			continue
+		}
+		if tt.check != nil {
+			if err := tt.check(got.(*serverHandlerTransport), &tt); err != nil {
+				t.Errorf("%s: %v", tt.name, err)
+			}
+		}
+	}
+}
+
+type testHandlerResponseWriter struct {
+	*httptest.ResponseRecorder
+	closeNotify chan bool
+}
+
+func (w testHandlerResponseWriter) CloseNotify() <-chan bool { return w.closeNotify }
+func (w testHandlerResponseWriter) Flush()                   {}
+
+func newTestHandlerResponseWriter() http.ResponseWriter {
+	return testHandlerResponseWriter{
+		ResponseRecorder: httptest.NewRecorder(),
+		closeNotify:      make(chan bool, 1),
+	}
+}
+
+type handleStreamTest struct {
+	t     *testing.T
+	bodyw *io.PipeWriter
+	req   *http.Request
+	rw    testHandlerResponseWriter
+	ht    *serverHandlerTransport
+}
+
+func newHandleStreamTest(t *testing.T) *handleStreamTest {
+	bodyr, bodyw := io.Pipe()
+	req := &http.Request{
+		ProtoMajor: 2,
+		Method:     "POST",
+		Header: http.Header{
+			"Content-Type": {"application/grpc"},
+		},
+		URL: &url.URL{
+			Path: "/service/foo.bar",
+		},
+		RequestURI: "/service/foo.bar",
+		Body:       bodyr,
+	}
+	rw := newTestHandlerResponseWriter().(testHandlerResponseWriter)
+	ht, err := NewServerHandlerTransport(rw, req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return &handleStreamTest{
+		t:     t,
+		bodyw: bodyw,
+		ht:    ht.(*serverHandlerTransport),
+		rw:    rw,
+	}
+}
+
+func TestHandlerTransport_HandleStreams(t *testing.T) {
+	st := newHandleStreamTest(t)
+	handleStream := func(s *Stream) {
+		if want := "/service/foo.bar"; s.method != want {
+			t.Errorf("stream method = %q; want %q", s.method, want)
+		}
+		st.bodyw.Close() // no body
+		st.ht.WriteStatus(s, codes.OK, "")
+	}
+	st.ht.HandleStreams(
+		func(s *Stream) { go handleStream(s) },
+		func(ctx context.Context, method string) context.Context { return ctx },
+	)
+	wantHeader := http.Header{
+		"Date":         nil,
+		"Content-Type": {"application/grpc"},
+		"Trailer":      {"Grpc-Status", "Grpc-Message"},
+		"Grpc-Status":  {"0"},
+	}
+	if !reflect.DeepEqual(st.rw.HeaderMap, wantHeader) {
+		t.Errorf("Header+Trailer Map: %#v; want %#v", st.rw.HeaderMap, wantHeader)
+	}
+}
+
+// Tests that codes.Unimplemented will close the body, per comment in handler_server.go.
+func TestHandlerTransport_HandleStreams_Unimplemented(t *testing.T) {
+	handleStreamCloseBodyTest(t, codes.Unimplemented, "thingy is unimplemented")
+}
+
+// Tests that codes.InvalidArgument will close the body, per comment in handler_server.go.
+func TestHandlerTransport_HandleStreams_InvalidArgument(t *testing.T) {
+	handleStreamCloseBodyTest(t, codes.InvalidArgument, "bad arg")
+}
+
+func handleStreamCloseBodyTest(t *testing.T, statusCode codes.Code, msg string) {
+	st := newHandleStreamTest(t)
+	handleStream := func(s *Stream) {
+		st.ht.WriteStatus(s, statusCode, msg)
+	}
+	st.ht.HandleStreams(
+		func(s *Stream) { go handleStream(s) },
+		func(ctx context.Context, method string) context.Context { return ctx },
+	)
+	wantHeader := http.Header{
+		"Date":         nil,
+		"Content-Type": {"application/grpc"},
+		"Trailer":      {"Grpc-Status", "Grpc-Message"},
+		"Grpc-Status":  {fmt.Sprint(uint32(statusCode))},
+		"Grpc-Message": {encodeGrpcMessage(msg)},
+	}
+	if !reflect.DeepEqual(st.rw.HeaderMap, wantHeader) {
+		t.Errorf("Header+Trailer mismatch.\n got: %#v\nwant: %#v", st.rw.HeaderMap, wantHeader)
+	}
+}
+
+func TestHandlerTransport_HandleStreams_Timeout(t *testing.T) {
+	bodyr, bodyw := io.Pipe()
+	req := &http.Request{
+		ProtoMajor: 2,
+		Method:     "POST",
+		Header: http.Header{
+			"Content-Type": {"application/grpc"},
+			"Grpc-Timeout": {"200m"},
+		},
+		URL: &url.URL{
+			Path: "/service/foo.bar",
+		},
+		RequestURI: "/service/foo.bar",
+		Body:       bodyr,
+	}
+	rw := newTestHandlerResponseWriter().(testHandlerResponseWriter)
+	ht, err := NewServerHandlerTransport(rw, req)
+	if err != nil {
+		t.Fatal(err)
+	}
+	runStream := func(s *Stream) {
+		defer bodyw.Close()
+		select {
+		case <-s.ctx.Done():
+		case <-time.After(5 * time.Second):
+			t.Errorf("timeout waiting for ctx.Done")
+			return
+		}
+		err := s.ctx.Err()
+		if err != context.DeadlineExceeded {
+			t.Errorf("ctx.Err = %v; want %v", err, context.DeadlineExceeded)
+			return
+		}
+		ht.WriteStatus(s, codes.DeadlineExceeded, "too slow")
+	}
+	ht.HandleStreams(
+		func(s *Stream) { go runStream(s) },
+		func(ctx context.Context, method string) context.Context { return ctx },
+	)
+	wantHeader := http.Header{
+		"Date":         nil,
+		"Content-Type": {"application/grpc"},
+		"Trailer":      {"Grpc-Status", "Grpc-Message"},
+		"Grpc-Status":  {"4"},
+		"Grpc-Message": {encodeGrpcMessage("too slow")},
+	}
+	if !reflect.DeepEqual(rw.HeaderMap, wantHeader) {
+		t.Errorf("Header+Trailer Map mismatch.\n got: %#v\nwant: %#v", rw.HeaderMap, wantHeader)
+	}
+}
diff --git a/vendor/google.golang.org/grpc/transport/http2_client.go b/vendor/google.golang.org/grpc/transport/http2_client.go
new file mode 100644
index 00000000000..550fe713d17
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/http2_client.go
@@ -0,0 +1,1230 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"net"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/hpack"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+)
+
+// http2Client implements the ClientTransport interface with HTTP2.
+type http2Client struct {
+	ctx        context.Context
+	target     string // server name/addr
+	userAgent  string
+	md         interface{}
+	conn       net.Conn // underlying communication channel
+	remoteAddr net.Addr
+	localAddr  net.Addr
+	authInfo   credentials.AuthInfo // auth info about the connection
+	nextID     uint32               // the next stream ID to be used
+
+	// writableChan synchronizes write access to the transport.
+	// A writer acquires the write lock by sending a value on writableChan
+	// and releases it by receiving from writableChan.
+	writableChan chan int
+	// shutdownChan is closed when Close is called.
+	// Blocking operations should select on shutdownChan to avoid
+	// blocking forever after Close.
+	// TODO(zhaoq): Maybe have a channel context?
+	shutdownChan chan struct{}
+	// errorChan is closed to notify the I/O error to the caller.
+	errorChan chan struct{}
+	// goAway is closed to notify the upper layer (i.e., addrConn.transportMonitor)
+	// that the server sent GoAway on this transport.
+	goAway chan struct{}
+	// awakenKeepalive is used to wake up keepalive when after it has gone dormant.
+	awakenKeepalive chan struct{}
+
+	framer *framer
+	hBuf   *bytes.Buffer  // the buffer for HPACK encoding
+	hEnc   *hpack.Encoder // HPACK encoder
+
+	// controlBuf delivers all the control related tasks (e.g., window
+	// updates, reset streams, and various settings) to the controller.
+	controlBuf *recvBuffer
+	fc         *inFlow
+	// sendQuotaPool provides flow control to outbound message.
+	sendQuotaPool *quotaPool
+	// streamsQuota limits the max number of concurrent streams.
+	streamsQuota *quotaPool
+
+	// The scheme used: https if TLS is on, http otherwise.
+	scheme string
+
+	creds []credentials.PerRPCCredentials
+
+	// Boolean to keep track of reading activity on transport.
+	// 1 is true and 0 is false.
+	activity uint32 // Accessed atomically.
+	kp       keepalive.ClientParameters
+
+	statsHandler stats.Handler
+
+	mu            sync.Mutex     // guard the following variables
+	state         transportState // the state of underlying connection
+	activeStreams map[uint32]*Stream
+	// The max number of concurrent streams
+	maxStreams int
+	// the per-stream outbound flow control window size set by the peer.
+	streamSendQuota uint32
+	// goAwayID records the Last-Stream-ID in the GoAway frame from the server.
+	goAwayID uint32
+	// prevGoAway ID records the Last-Stream-ID in the previous GOAway frame.
+	prevGoAwayID uint32
+}
+
+func dial(ctx context.Context, fn func(context.Context, string) (net.Conn, error), addr string) (net.Conn, error) {
+	if fn != nil {
+		return fn(ctx, addr)
+	}
+	return dialContext(ctx, "tcp", addr)
+}
+
+func isTemporary(err error) bool {
+	switch err {
+	case io.EOF:
+		// Connection closures may be resolved upon retry, and are thus
+		// treated as temporary.
+		return true
+	case context.DeadlineExceeded:
+		// In Go 1.7, context.DeadlineExceeded implements Timeout(), and this
+		// special case is not needed. Until then, we need to keep this
+		// clause.
+		return true
+	}
+
+	switch err := err.(type) {
+	case interface {
+		Temporary() bool
+	}:
+		return err.Temporary()
+	case interface {
+		Timeout() bool
+	}:
+		// Timeouts may be resolved upon retry, and are thus treated as
+		// temporary.
+		return err.Timeout()
+	}
+	return false
+}
+
+// newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2
+// and starts to receive messages on it. Non-nil error returns if construction
+// fails.
+func newHTTP2Client(ctx context.Context, addr TargetInfo, opts ConnectOptions) (_ ClientTransport, err error) {
+	scheme := "http"
+	conn, err := dial(ctx, opts.Dialer, addr.Addr)
+	if err != nil {
+		if opts.FailOnNonTempDialError {
+			return nil, connectionErrorf(isTemporary(err), err, "transport: %v", err)
+		}
+		return nil, connectionErrorf(true, err, "transport: %v", err)
+	}
+	// Any further errors will close the underlying connection
+	defer func(conn net.Conn) {
+		if err != nil {
+			conn.Close()
+		}
+	}(conn)
+	var authInfo credentials.AuthInfo
+	if creds := opts.TransportCredentials; creds != nil {
+		scheme = "https"
+		conn, authInfo, err = creds.ClientHandshake(ctx, addr.Addr, conn)
+		if err != nil {
+			// Credentials handshake errors are typically considered permanent
+			// to avoid retrying on e.g. bad certificates.
+			temp := isTemporary(err)
+			return nil, connectionErrorf(temp, err, "transport: %v", err)
+		}
+	}
+	kp := opts.KeepaliveParams
+	// Validate keepalive parameters.
+	if kp.Time == 0 {
+		kp.Time = defaultClientKeepaliveTime
+	}
+	if kp.Timeout == 0 {
+		kp.Timeout = defaultClientKeepaliveTimeout
+	}
+	var buf bytes.Buffer
+	t := &http2Client{
+		ctx:        ctx,
+		target:     addr.Addr,
+		userAgent:  opts.UserAgent,
+		md:         addr.Metadata,
+		conn:       conn,
+		remoteAddr: conn.RemoteAddr(),
+		localAddr:  conn.LocalAddr(),
+		authInfo:   authInfo,
+		// The client initiated stream id is odd starting from 1.
+		nextID:          1,
+		writableChan:    make(chan int, 1),
+		shutdownChan:    make(chan struct{}),
+		errorChan:       make(chan struct{}),
+		goAway:          make(chan struct{}),
+		awakenKeepalive: make(chan struct{}, 1),
+		framer:          newFramer(conn),
+		hBuf:            &buf,
+		hEnc:            hpack.NewEncoder(&buf),
+		controlBuf:      newRecvBuffer(),
+		fc:              &inFlow{limit: initialConnWindowSize},
+		sendQuotaPool:   newQuotaPool(defaultWindowSize),
+		scheme:          scheme,
+		state:           reachable,
+		activeStreams:   make(map[uint32]*Stream),
+		creds:           opts.PerRPCCredentials,
+		maxStreams:      defaultMaxStreamsClient,
+		streamsQuota:    newQuotaPool(defaultMaxStreamsClient),
+		streamSendQuota: defaultWindowSize,
+		kp:              kp,
+		statsHandler:    opts.StatsHandler,
+	}
+	// Make sure awakenKeepalive can't be written upon.
+	// keepalive routine will make it writable, if need be.
+	t.awakenKeepalive <- struct{}{}
+	if t.statsHandler != nil {
+		t.ctx = t.statsHandler.TagConn(t.ctx, &stats.ConnTagInfo{
+			RemoteAddr: t.remoteAddr,
+			LocalAddr:  t.localAddr,
+		})
+		connBegin := &stats.ConnBegin{
+			Client: true,
+		}
+		t.statsHandler.HandleConn(t.ctx, connBegin)
+	}
+	// Start the reader goroutine for incoming message. Each transport has
+	// a dedicated goroutine which reads HTTP2 frame from network. Then it
+	// dispatches the frame to the corresponding stream entity.
+	go t.reader()
+	// Send connection preface to server.
+	n, err := t.conn.Write(clientPreface)
+	if err != nil {
+		t.Close()
+		return nil, connectionErrorf(true, err, "transport: %v", err)
+	}
+	if n != len(clientPreface) {
+		t.Close()
+		return nil, connectionErrorf(true, err, "transport: preface mismatch, wrote %d bytes; want %d", n, len(clientPreface))
+	}
+	if initialWindowSize != defaultWindowSize {
+		err = t.framer.writeSettings(true, http2.Setting{
+			ID:  http2.SettingInitialWindowSize,
+			Val: uint32(initialWindowSize),
+		})
+	} else {
+		err = t.framer.writeSettings(true)
+	}
+	if err != nil {
+		t.Close()
+		return nil, connectionErrorf(true, err, "transport: %v", err)
+	}
+	// Adjust the connection flow control window if needed.
+	if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 {
+		if err := t.framer.writeWindowUpdate(true, 0, delta); err != nil {
+			t.Close()
+			return nil, connectionErrorf(true, err, "transport: %v", err)
+		}
+	}
+	go t.controller()
+	if t.kp.Time != infinity {
+		go t.keepalive()
+	}
+	t.writableChan <- 0
+	return t, nil
+}
+
+func (t *http2Client) newStream(ctx context.Context, callHdr *CallHdr) *Stream {
+	// TODO(zhaoq): Handle uint32 overflow of Stream.id.
+	s := &Stream{
+		id:            t.nextID,
+		done:          make(chan struct{}),
+		goAway:        make(chan struct{}),
+		method:        callHdr.Method,
+		sendCompress:  callHdr.SendCompress,
+		buf:           newRecvBuffer(),
+		fc:            &inFlow{limit: initialWindowSize},
+		sendQuotaPool: newQuotaPool(int(t.streamSendQuota)),
+		headerChan:    make(chan struct{}),
+	}
+	t.nextID += 2
+	s.windowHandler = func(n int) {
+		t.updateWindow(s, uint32(n))
+	}
+	// The client side stream context should have exactly the same life cycle with the user provided context.
+	// That means, s.ctx should be read-only. And s.ctx is done iff ctx is done.
+	// So we use the original context here instead of creating a copy.
+	s.ctx = ctx
+	s.dec = &recvBufferReader{
+		ctx:    s.ctx,
+		goAway: s.goAway,
+		recv:   s.buf,
+	}
+	return s
+}
+
+// NewStream creates a stream and register it into the transport as "active"
+// streams.
+func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) {
+	pr := &peer.Peer{
+		Addr: t.remoteAddr,
+	}
+	// Attach Auth info if there is any.
+	if t.authInfo != nil {
+		pr.AuthInfo = t.authInfo
+	}
+	userCtx := ctx
+	ctx = peer.NewContext(ctx, pr)
+	authData := make(map[string]string)
+	for _, c := range t.creds {
+		// Construct URI required to get auth request metadata.
+		var port string
+		if pos := strings.LastIndex(t.target, ":"); pos != -1 {
+			// Omit port if it is the default one.
+			if t.target[pos+1:] != "443" {
+				port = ":" + t.target[pos+1:]
+			}
+		}
+		pos := strings.LastIndex(callHdr.Method, "/")
+		if pos == -1 {
+			return nil, streamErrorf(codes.InvalidArgument, "transport: malformed method name: %q", callHdr.Method)
+		}
+		audience := "https://" + callHdr.Host + port + callHdr.Method[:pos]
+		data, err := c.GetRequestMetadata(ctx, audience)
+		if err != nil {
+			return nil, streamErrorf(codes.InvalidArgument, "transport: %v", err)
+		}
+		for k, v := range data {
+			authData[k] = v
+		}
+	}
+	t.mu.Lock()
+	if t.activeStreams == nil {
+		t.mu.Unlock()
+		return nil, ErrConnClosing
+	}
+	if t.state == draining {
+		t.mu.Unlock()
+		return nil, ErrStreamDrain
+	}
+	if t.state != reachable {
+		t.mu.Unlock()
+		return nil, ErrConnClosing
+	}
+	t.mu.Unlock()
+	sq, err := wait(ctx, nil, nil, t.shutdownChan, t.streamsQuota.acquire())
+	if err != nil {
+		return nil, err
+	}
+	// Returns the quota balance back.
+	if sq > 1 {
+		t.streamsQuota.add(sq - 1)
+	}
+	if _, err := wait(ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
+		// Return the quota back now because there is no stream returned to the caller.
+		if _, ok := err.(StreamError); ok {
+			t.streamsQuota.add(1)
+		}
+		return nil, err
+	}
+	t.mu.Lock()
+	if t.state == draining {
+		t.mu.Unlock()
+		t.streamsQuota.add(1)
+		// Need to make t writable again so that the rpc in flight can still proceed.
+		t.writableChan <- 0
+		return nil, ErrStreamDrain
+	}
+	if t.state != reachable {
+		t.mu.Unlock()
+		return nil, ErrConnClosing
+	}
+	s := t.newStream(ctx, callHdr)
+	s.clientStatsCtx = userCtx
+	t.activeStreams[s.id] = s
+	// If the number of active streams change from 0 to 1, then check if keepalive
+	// has gone dormant. If so, wake it up.
+	if len(t.activeStreams) == 1 {
+		select {
+		case t.awakenKeepalive <- struct{}{}:
+			t.framer.writePing(false, false, [8]byte{})
+		default:
+		}
+	}
+
+	t.mu.Unlock()
+
+	// HPACK encodes various headers. Note that once WriteField(...) is
+	// called, the corresponding headers/continuation frame has to be sent
+	// because hpack.Encoder is stateful.
+	t.hBuf.Reset()
+	t.hEnc.WriteField(hpack.HeaderField{Name: ":method", Value: "POST"})
+	t.hEnc.WriteField(hpack.HeaderField{Name: ":scheme", Value: t.scheme})
+	t.hEnc.WriteField(hpack.HeaderField{Name: ":path", Value: callHdr.Method})
+	t.hEnc.WriteField(hpack.HeaderField{Name: ":authority", Value: callHdr.Host})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "user-agent", Value: t.userAgent})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "te", Value: "trailers"})
+
+	if callHdr.SendCompress != "" {
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: callHdr.SendCompress})
+	}
+	if dl, ok := ctx.Deadline(); ok {
+		// Send out timeout regardless its value. The server can detect timeout context by itself.
+		timeout := dl.Sub(time.Now())
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: encodeTimeout(timeout)})
+	}
+
+	for k, v := range authData {
+		// Capital header names are illegal in HTTP/2.
+		k = strings.ToLower(k)
+		t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: v})
+	}
+	var (
+		hasMD      bool
+		endHeaders bool
+	)
+	if md, ok := metadata.FromContext(ctx); ok {
+		hasMD = true
+		for k, v := range md {
+			// HTTP doesn't allow you to set pseudoheaders after non pseudoheaders were set.
+			if isReservedHeader(k) {
+				continue
+			}
+			for _, entry := range v {
+				t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
+			}
+		}
+	}
+	if md, ok := t.md.(*metadata.MD); ok {
+		for k, v := range *md {
+			if isReservedHeader(k) {
+				continue
+			}
+			for _, entry := range v {
+				t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
+			}
+		}
+	}
+	first := true
+	bufLen := t.hBuf.Len()
+	// Sends the headers in a single batch even when they span multiple frames.
+	for !endHeaders {
+		size := t.hBuf.Len()
+		if size > http2MaxFrameLen {
+			size = http2MaxFrameLen
+		} else {
+			endHeaders = true
+		}
+		var flush bool
+		if endHeaders && (hasMD || callHdr.Flush) {
+			flush = true
+		}
+		if first {
+			// Sends a HeadersFrame to server to start a new stream.
+			p := http2.HeadersFrameParam{
+				StreamID:      s.id,
+				BlockFragment: t.hBuf.Next(size),
+				EndStream:     false,
+				EndHeaders:    endHeaders,
+			}
+			// Do a force flush for the buffered frames iff it is the last headers frame
+			// and there is header metadata to be sent. Otherwise, there is flushing until
+			// the corresponding data frame is written.
+			err = t.framer.writeHeaders(flush, p)
+			first = false
+		} else {
+			// Sends Continuation frames for the leftover headers.
+			err = t.framer.writeContinuation(flush, s.id, endHeaders, t.hBuf.Next(size))
+		}
+		if err != nil {
+			t.notifyError(err)
+			return nil, connectionErrorf(true, err, "transport: %v", err)
+		}
+	}
+	if t.statsHandler != nil {
+		outHeader := &stats.OutHeader{
+			Client:      true,
+			WireLength:  bufLen,
+			FullMethod:  callHdr.Method,
+			RemoteAddr:  t.remoteAddr,
+			LocalAddr:   t.localAddr,
+			Compression: callHdr.SendCompress,
+		}
+		t.statsHandler.HandleRPC(s.clientStatsCtx, outHeader)
+	}
+	t.writableChan <- 0
+	return s, nil
+}
+
+// CloseStream clears the footprint of a stream when the stream is not needed any more.
+// This must not be executed in reader's goroutine.
+func (t *http2Client) CloseStream(s *Stream, err error) {
+	t.mu.Lock()
+	if t.activeStreams == nil {
+		t.mu.Unlock()
+		return
+	}
+	delete(t.activeStreams, s.id)
+	if t.state == draining && len(t.activeStreams) == 0 {
+		// The transport is draining and s is the last live stream on t.
+		t.mu.Unlock()
+		t.Close()
+		return
+	}
+	t.mu.Unlock()
+	// rstStream is true in case the stream is being closed at the client-side
+	// and the server needs to be intimated about it by sending a RST_STREAM
+	// frame.
+	// To make sure this frame is written to the wire before the headers of the
+	// next stream waiting for streamsQuota, we add to streamsQuota pool only
+	// after having acquired the writableChan to send RST_STREAM out (look at
+	// the controller() routine).
+	var rstStream bool
+	var rstError http2.ErrCode
+	defer func() {
+		// In case, the client doesn't have to send RST_STREAM to server
+		// we can safely add back to streamsQuota pool now.
+		if !rstStream {
+			t.streamsQuota.add(1)
+			return
+		}
+		t.controlBuf.put(&resetStream{s.id, rstError})
+	}()
+	s.mu.Lock()
+	rstStream = s.rstStream
+	rstError = s.rstError
+	if q := s.fc.resetPendingData(); q > 0 {
+		if n := t.fc.onRead(q); n > 0 {
+			t.controlBuf.put(&windowUpdate{0, n})
+		}
+	}
+	if s.state == streamDone {
+		s.mu.Unlock()
+		return
+	}
+	if !s.headerDone {
+		close(s.headerChan)
+		s.headerDone = true
+	}
+	s.state = streamDone
+	s.mu.Unlock()
+	if _, ok := err.(StreamError); ok {
+		rstStream = true
+		rstError = http2.ErrCodeCancel
+	}
+}
+
+// Close kicks off the shutdown process of the transport. This should be called
+// only once on a transport. Once it is called, the transport should not be
+// accessed any more.
+func (t *http2Client) Close() (err error) {
+	t.mu.Lock()
+	if t.state == closing {
+		t.mu.Unlock()
+		return
+	}
+	if t.state == reachable || t.state == draining {
+		close(t.errorChan)
+	}
+	t.state = closing
+	t.mu.Unlock()
+	close(t.shutdownChan)
+	err = t.conn.Close()
+	t.mu.Lock()
+	streams := t.activeStreams
+	t.activeStreams = nil
+	t.mu.Unlock()
+	// Notify all active streams.
+	for _, s := range streams {
+		s.mu.Lock()
+		if !s.headerDone {
+			close(s.headerChan)
+			s.headerDone = true
+		}
+		s.mu.Unlock()
+		s.write(recvMsg{err: ErrConnClosing})
+	}
+	if t.statsHandler != nil {
+		connEnd := &stats.ConnEnd{
+			Client: true,
+		}
+		t.statsHandler.HandleConn(t.ctx, connEnd)
+	}
+	return
+}
+
+func (t *http2Client) GracefulClose() error {
+	t.mu.Lock()
+	switch t.state {
+	case unreachable:
+		// The server may close the connection concurrently. t is not available for
+		// any streams. Close it now.
+		t.mu.Unlock()
+		t.Close()
+		return nil
+	case closing:
+		t.mu.Unlock()
+		return nil
+	}
+	// Notify the streams which were initiated after the server sent GOAWAY.
+	select {
+	case <-t.goAway:
+		n := t.prevGoAwayID
+		if n == 0 && t.nextID > 1 {
+			n = t.nextID - 2
+		}
+		m := t.goAwayID + 2
+		if m == 2 {
+			m = 1
+		}
+		for i := m; i <= n; i += 2 {
+			if s, ok := t.activeStreams[i]; ok {
+				close(s.goAway)
+			}
+		}
+	default:
+	}
+	if t.state == draining {
+		t.mu.Unlock()
+		return nil
+	}
+	t.state = draining
+	active := len(t.activeStreams)
+	t.mu.Unlock()
+	if active == 0 {
+		return t.Close()
+	}
+	return nil
+}
+
+// Write formats the data into HTTP2 data frame(s) and sends it out. The caller
+// should proceed only if Write returns nil.
+// TODO(zhaoq): opts.Delay is ignored in this implementation. Support it later
+// if it improves the performance.
+func (t *http2Client) Write(s *Stream, data []byte, opts *Options) error {
+	r := bytes.NewBuffer(data)
+	for {
+		var p []byte
+		if r.Len() > 0 {
+			size := http2MaxFrameLen
+			// Wait until the stream has some quota to send the data.
+			sq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, s.sendQuotaPool.acquire())
+			if err != nil {
+				return err
+			}
+			// Wait until the transport has some quota to send the data.
+			tq, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.sendQuotaPool.acquire())
+			if err != nil {
+				return err
+			}
+			if sq < size {
+				size = sq
+			}
+			if tq < size {
+				size = tq
+			}
+			p = r.Next(size)
+			ps := len(p)
+			if ps < sq {
+				// Overbooked stream quota. Return it back.
+				s.sendQuotaPool.add(sq - ps)
+			}
+			if ps < tq {
+				// Overbooked transport quota. Return it back.
+				t.sendQuotaPool.add(tq - ps)
+			}
+		}
+		var (
+			endStream  bool
+			forceFlush bool
+		)
+		if opts.Last && r.Len() == 0 {
+			endStream = true
+		}
+		// Indicate there is a writer who is about to write a data frame.
+		t.framer.adjustNumWriters(1)
+		// Got some quota. Try to acquire writing privilege on the transport.
+		if _, err := wait(s.ctx, s.done, s.goAway, t.shutdownChan, t.writableChan); err != nil {
+			if _, ok := err.(StreamError); ok || err == io.EOF {
+				// Return the connection quota back.
+				t.sendQuotaPool.add(len(p))
+			}
+			if t.framer.adjustNumWriters(-1) == 0 {
+				// This writer is the last one in this batch and has the
+				// responsibility to flush the buffered frames. It queues
+				// a flush request to controlBuf instead of flushing directly
+				// in order to avoid the race with other writing or flushing.
+				t.controlBuf.put(&flushIO{})
+			}
+			return err
+		}
+		select {
+		case <-s.ctx.Done():
+			t.sendQuotaPool.add(len(p))
+			if t.framer.adjustNumWriters(-1) == 0 {
+				t.controlBuf.put(&flushIO{})
+			}
+			t.writableChan <- 0
+			return ContextErr(s.ctx.Err())
+		default:
+		}
+		if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 {
+			// Do a force flush iff this is last frame for the entire gRPC message
+			// and the caller is the only writer at this moment.
+			forceFlush = true
+		}
+		// If WriteData fails, all the pending streams will be handled
+		// by http2Client.Close(). No explicit CloseStream() needs to be
+		// invoked.
+		if err := t.framer.writeData(forceFlush, s.id, endStream, p); err != nil {
+			t.notifyError(err)
+			return connectionErrorf(true, err, "transport: %v", err)
+		}
+		if t.framer.adjustNumWriters(-1) == 0 {
+			t.framer.flushWrite()
+		}
+		t.writableChan <- 0
+		if r.Len() == 0 {
+			break
+		}
+	}
+	if !opts.Last {
+		return nil
+	}
+	s.mu.Lock()
+	if s.state != streamDone {
+		s.state = streamWriteDone
+	}
+	s.mu.Unlock()
+	return nil
+}
+
+func (t *http2Client) getStream(f http2.Frame) (*Stream, bool) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	s, ok := t.activeStreams[f.Header().StreamID]
+	return s, ok
+}
+
+// updateWindow adjusts the inbound quota for the stream and the transport.
+// Window updates will deliver to the controller for sending when
+// the cumulative quota exceeds the corresponding threshold.
+func (t *http2Client) updateWindow(s *Stream, n uint32) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.state == streamDone {
+		return
+	}
+	if w := t.fc.onRead(n); w > 0 {
+		t.controlBuf.put(&windowUpdate{0, w})
+	}
+	if w := s.fc.onRead(n); w > 0 {
+		t.controlBuf.put(&windowUpdate{s.id, w})
+	}
+}
+
+func (t *http2Client) handleData(f *http2.DataFrame) {
+	size := f.Header().Length
+	if err := t.fc.onData(uint32(size)); err != nil {
+		t.notifyError(connectionErrorf(true, err, "%v", err))
+		return
+	}
+	// Select the right stream to dispatch.
+	s, ok := t.getStream(f)
+	if !ok {
+		if w := t.fc.onRead(uint32(size)); w > 0 {
+			t.controlBuf.put(&windowUpdate{0, w})
+		}
+		return
+	}
+	if size > 0 {
+		if f.Header().Flags.Has(http2.FlagDataPadded) {
+			if w := t.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
+				t.controlBuf.put(&windowUpdate{0, w})
+			}
+		}
+		s.mu.Lock()
+		if s.state == streamDone {
+			s.mu.Unlock()
+			// The stream has been closed. Release the corresponding quota.
+			if w := t.fc.onRead(uint32(size)); w > 0 {
+				t.controlBuf.put(&windowUpdate{0, w})
+			}
+			return
+		}
+		if err := s.fc.onData(uint32(size)); err != nil {
+			s.state = streamDone
+			s.statusCode = codes.Internal
+			s.statusDesc = err.Error()
+			s.rstStream = true
+			s.rstError = http2.ErrCodeFlowControl
+			close(s.done)
+			s.mu.Unlock()
+			s.write(recvMsg{err: io.EOF})
+			return
+		}
+		if f.Header().Flags.Has(http2.FlagDataPadded) {
+			if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
+				t.controlBuf.put(&windowUpdate{s.id, w})
+			}
+		}
+		s.mu.Unlock()
+		// TODO(bradfitz, zhaoq): A copy is required here because there is no
+		// guarantee f.Data() is consumed before the arrival of next frame.
+		// Can this copy be eliminated?
+		if len(f.Data()) > 0 {
+			data := make([]byte, len(f.Data()))
+			copy(data, f.Data())
+			s.write(recvMsg{data: data})
+		}
+	}
+	// The server has closed the stream without sending trailers.  Record that
+	// the read direction is closed, and set the status appropriately.
+	if f.FrameHeader.Flags.Has(http2.FlagDataEndStream) {
+		s.mu.Lock()
+		if s.state == streamDone {
+			s.mu.Unlock()
+			return
+		}
+		s.state = streamDone
+		s.statusCode = codes.Internal
+		s.statusDesc = "server closed the stream without sending trailers"
+		close(s.done)
+		s.mu.Unlock()
+		s.write(recvMsg{err: io.EOF})
+	}
+}
+
+func (t *http2Client) handleRSTStream(f *http2.RSTStreamFrame) {
+	s, ok := t.getStream(f)
+	if !ok {
+		return
+	}
+	s.mu.Lock()
+	if s.state == streamDone {
+		s.mu.Unlock()
+		return
+	}
+	s.state = streamDone
+	if !s.headerDone {
+		close(s.headerChan)
+		s.headerDone = true
+	}
+	s.statusCode, ok = http2ErrConvTab[http2.ErrCode(f.ErrCode)]
+	if !ok {
+		grpclog.Println("transport: http2Client.handleRSTStream found no mapped gRPC status for the received http2 error ", f.ErrCode)
+		s.statusCode = codes.Unknown
+	}
+	s.statusDesc = fmt.Sprintf("stream terminated by RST_STREAM with error code: %d", f.ErrCode)
+	close(s.done)
+	s.mu.Unlock()
+	s.write(recvMsg{err: io.EOF})
+}
+
+func (t *http2Client) handleSettings(f *http2.SettingsFrame) {
+	if f.IsAck() {
+		return
+	}
+	var ss []http2.Setting
+	f.ForeachSetting(func(s http2.Setting) error {
+		ss = append(ss, s)
+		return nil
+	})
+	// The settings will be applied once the ack is sent.
+	t.controlBuf.put(&settings{ack: true, ss: ss})
+}
+
+func (t *http2Client) handlePing(f *http2.PingFrame) {
+	if f.IsAck() { // Do nothing.
+		return
+	}
+	pingAck := &ping{ack: true}
+	copy(pingAck.data[:], f.Data[:])
+	t.controlBuf.put(pingAck)
+}
+
+func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
+	t.mu.Lock()
+	if t.state == reachable || t.state == draining {
+		if f.LastStreamID > 0 && f.LastStreamID%2 != 1 {
+			t.mu.Unlock()
+			t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: stream ID %d is even", f.LastStreamID))
+			return
+		}
+		select {
+		case <-t.goAway:
+			id := t.goAwayID
+			// t.goAway has been closed (i.e.,multiple GoAways).
+			if id < f.LastStreamID {
+				t.mu.Unlock()
+				t.notifyError(connectionErrorf(true, nil, "received illegal http2 GOAWAY frame: previously recv GOAWAY frame with LastStramID %d, currently recv %d", id, f.LastStreamID))
+				return
+			}
+			t.prevGoAwayID = id
+			t.goAwayID = f.LastStreamID
+			t.mu.Unlock()
+			return
+		default:
+		}
+		t.goAwayID = f.LastStreamID
+		close(t.goAway)
+	}
+	t.mu.Unlock()
+}
+
+func (t *http2Client) handleWindowUpdate(f *http2.WindowUpdateFrame) {
+	id := f.Header().StreamID
+	incr := f.Increment
+	if id == 0 {
+		t.sendQuotaPool.add(int(incr))
+		return
+	}
+	if s, ok := t.getStream(f); ok {
+		s.sendQuotaPool.add(int(incr))
+	}
+}
+
+// operateHeaders takes action on the decoded headers.
+func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
+	s, ok := t.getStream(frame)
+	if !ok {
+		return
+	}
+	var state decodeState
+	for _, hf := range frame.Fields {
+		state.processHeaderField(hf)
+	}
+	if state.err != nil {
+		s.mu.Lock()
+		if !s.headerDone {
+			close(s.headerChan)
+			s.headerDone = true
+		}
+		s.mu.Unlock()
+		s.write(recvMsg{err: state.err})
+		// Something wrong. Stops reading even when there is remaining.
+		return
+	}
+
+	endStream := frame.StreamEnded()
+	var isHeader bool
+	defer func() {
+		if t.statsHandler != nil {
+			if isHeader {
+				inHeader := &stats.InHeader{
+					Client:     true,
+					WireLength: int(frame.Header().Length),
+				}
+				t.statsHandler.HandleRPC(s.clientStatsCtx, inHeader)
+			} else {
+				inTrailer := &stats.InTrailer{
+					Client:     true,
+					WireLength: int(frame.Header().Length),
+				}
+				t.statsHandler.HandleRPC(s.clientStatsCtx, inTrailer)
+			}
+		}
+	}()
+
+	s.mu.Lock()
+	if !endStream {
+		s.recvCompress = state.encoding
+	}
+	if !s.headerDone {
+		if !endStream && len(state.mdata) > 0 {
+			s.header = state.mdata
+		}
+		close(s.headerChan)
+		s.headerDone = true
+		isHeader = true
+	}
+	if !endStream || s.state == streamDone {
+		s.mu.Unlock()
+		return
+	}
+
+	if len(state.mdata) > 0 {
+		s.trailer = state.mdata
+	}
+	s.statusCode = state.statusCode
+	s.statusDesc = state.statusDesc
+	close(s.done)
+	s.state = streamDone
+	s.mu.Unlock()
+	s.write(recvMsg{err: io.EOF})
+}
+
+func handleMalformedHTTP2(s *Stream, err error) {
+	s.mu.Lock()
+	if !s.headerDone {
+		close(s.headerChan)
+		s.headerDone = true
+	}
+	s.mu.Unlock()
+	s.write(recvMsg{err: err})
+}
+
+// reader runs as a separate goroutine in charge of reading data from network
+// connection.
+//
+// TODO(zhaoq): currently one reader per transport. Investigate whether this is
+// optimal.
+// TODO(zhaoq): Check the validity of the incoming frame sequence.
+func (t *http2Client) reader() {
+	// Check the validity of server preface.
+	frame, err := t.framer.readFrame()
+	if err != nil {
+		t.notifyError(err)
+		return
+	}
+	atomic.CompareAndSwapUint32(&t.activity, 0, 1)
+	sf, ok := frame.(*http2.SettingsFrame)
+	if !ok {
+		t.notifyError(err)
+		return
+	}
+	t.handleSettings(sf)
+
+	// loop to keep reading incoming messages on this transport.
+	for {
+		frame, err := t.framer.readFrame()
+		atomic.CompareAndSwapUint32(&t.activity, 0, 1)
+		if err != nil {
+			// Abort an active stream if the http2.Framer returns a
+			// http2.StreamError. This can happen only if the server's response
+			// is malformed http2.
+			if se, ok := err.(http2.StreamError); ok {
+				t.mu.Lock()
+				s := t.activeStreams[se.StreamID]
+				t.mu.Unlock()
+				if s != nil {
+					// use error detail to provide better err message
+					handleMalformedHTTP2(s, streamErrorf(http2ErrConvTab[se.Code], "%v", t.framer.errorDetail()))
+				}
+				continue
+			} else {
+				// Transport error.
+				t.notifyError(err)
+				return
+			}
+		}
+		switch frame := frame.(type) {
+		case *http2.MetaHeadersFrame:
+			t.operateHeaders(frame)
+		case *http2.DataFrame:
+			t.handleData(frame)
+		case *http2.RSTStreamFrame:
+			t.handleRSTStream(frame)
+		case *http2.SettingsFrame:
+			t.handleSettings(frame)
+		case *http2.PingFrame:
+			t.handlePing(frame)
+		case *http2.GoAwayFrame:
+			t.handleGoAway(frame)
+		case *http2.WindowUpdateFrame:
+			t.handleWindowUpdate(frame)
+		default:
+			grpclog.Printf("transport: http2Client.reader got unhandled frame type %v.", frame)
+		}
+	}
+}
+
+func (t *http2Client) applySettings(ss []http2.Setting) {
+	for _, s := range ss {
+		switch s.ID {
+		case http2.SettingMaxConcurrentStreams:
+			// TODO(zhaoq): This is a hack to avoid significant refactoring of the
+			// code to deal with the unrealistic int32 overflow. Probably will try
+			// to find a better way to handle this later.
+			if s.Val > math.MaxInt32 {
+				s.Val = math.MaxInt32
+			}
+			t.mu.Lock()
+			ms := t.maxStreams
+			t.maxStreams = int(s.Val)
+			t.mu.Unlock()
+			t.streamsQuota.add(int(s.Val) - ms)
+		case http2.SettingInitialWindowSize:
+			t.mu.Lock()
+			for _, stream := range t.activeStreams {
+				// Adjust the sending quota for each stream.
+				stream.sendQuotaPool.add(int(s.Val - t.streamSendQuota))
+			}
+			t.streamSendQuota = s.Val
+			t.mu.Unlock()
+		}
+	}
+}
+
+// controller running in a separate goroutine takes charge of sending control
+// frames (e.g., window update, reset stream, setting, etc.) to the server.
+func (t *http2Client) controller() {
+	for {
+		select {
+		case i := <-t.controlBuf.get():
+			t.controlBuf.load()
+			select {
+			case <-t.writableChan:
+				switch i := i.(type) {
+				case *windowUpdate:
+					t.framer.writeWindowUpdate(true, i.streamID, i.increment)
+				case *settings:
+					if i.ack {
+						t.framer.writeSettingsAck(true)
+						t.applySettings(i.ss)
+					} else {
+						t.framer.writeSettings(true, i.ss...)
+					}
+				case *resetStream:
+					// If the server needs to be to intimated about stream closing,
+					// then we need to make sure the RST_STREAM frame is written to
+					// the wire before the headers of the next stream waiting on
+					// streamQuota. We ensure this by adding to the streamsQuota pool
+					// only after having acquired the writableChan to send RST_STREAM.
+					t.streamsQuota.add(1)
+					t.framer.writeRSTStream(true, i.streamID, i.code)
+				case *flushIO:
+					t.framer.flushWrite()
+				case *ping:
+					t.framer.writePing(true, i.ack, i.data)
+				default:
+					grpclog.Printf("transport: http2Client.controller got unexpected item type %v\n", i)
+				}
+				t.writableChan <- 0
+				continue
+			case <-t.shutdownChan:
+				return
+			}
+		case <-t.shutdownChan:
+			return
+		}
+	}
+}
+
+// keepalive running in a separate goroutune makes sure the connection is alive by sending pings.
+func (t *http2Client) keepalive() {
+	p := &ping{data: [8]byte{}}
+	timer := time.NewTimer(t.kp.Time)
+	for {
+		select {
+		case <-timer.C:
+			if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
+				timer.Reset(t.kp.Time)
+				continue
+			}
+			// Check if keepalive should go dormant.
+			t.mu.Lock()
+			if len(t.activeStreams) < 1 && !t.kp.PermitWithoutStream {
+				// Make awakenKeepalive writable.
+				<-t.awakenKeepalive
+				t.mu.Unlock()
+				select {
+				case <-t.awakenKeepalive:
+					// If the control gets here a ping has been sent
+					// need to reset the timer with keepalive.Timeout.
+				case <-t.shutdownChan:
+					return
+				}
+			} else {
+				t.mu.Unlock()
+				// Send ping.
+				t.controlBuf.put(p)
+			}
+
+			// By the time control gets here a ping has been sent one way or the other.
+			timer.Reset(t.kp.Timeout)
+			select {
+			case <-timer.C:
+				if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
+					timer.Reset(t.kp.Time)
+					continue
+				}
+				t.Close()
+				return
+			case <-t.shutdownChan:
+				if !timer.Stop() {
+					<-timer.C
+				}
+				return
+			}
+		case <-t.shutdownChan:
+			if !timer.Stop() {
+				<-timer.C
+			}
+			return
+		}
+	}
+}
+
+func (t *http2Client) Error() <-chan struct{} {
+	return t.errorChan
+}
+
+func (t *http2Client) GoAway() <-chan struct{} {
+	return t.goAway
+}
+
+func (t *http2Client) notifyError(err error) {
+	t.mu.Lock()
+	// make sure t.errorChan is closed only once.
+	if t.state == draining {
+		t.mu.Unlock()
+		t.Close()
+		return
+	}
+	if t.state == reachable {
+		t.state = unreachable
+		close(t.errorChan)
+		grpclog.Printf("transport: http2Client.notifyError got notified that the client transport was broken %v.", err)
+	}
+	t.mu.Unlock()
+}
diff --git a/vendor/google.golang.org/grpc/transport/http2_server.go b/vendor/google.golang.org/grpc/transport/http2_server.go
new file mode 100644
index 00000000000..e810d195381
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/http2_server.go
@@ -0,0 +1,988 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"math"
+	"math/rand"
+	"net"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/hpack"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/tap"
+)
+
+// ErrIllegalHeaderWrite indicates that setting header is illegal because of
+// the stream's state.
+var ErrIllegalHeaderWrite = errors.New("transport: the stream is done or WriteHeader was already called")
+
+// http2Server implements the ServerTransport interface with HTTP2.
+type http2Server struct {
+	ctx         context.Context
+	conn        net.Conn
+	remoteAddr  net.Addr
+	localAddr   net.Addr
+	maxStreamID uint32               // max stream ID ever seen
+	authInfo    credentials.AuthInfo // auth info about the connection
+	inTapHandle tap.ServerInHandle
+	// writableChan synchronizes write access to the transport.
+	// A writer acquires the write lock by receiving a value on writableChan
+	// and releases it by sending on writableChan.
+	writableChan chan int
+	// shutdownChan is closed when Close is called.
+	// Blocking operations should select on shutdownChan to avoid
+	// blocking forever after Close.
+	shutdownChan chan struct{}
+	framer       *framer
+	hBuf         *bytes.Buffer  // the buffer for HPACK encoding
+	hEnc         *hpack.Encoder // HPACK encoder
+
+	// The max number of concurrent streams.
+	maxStreams uint32
+	// controlBuf delivers all the control related tasks (e.g., window
+	// updates, reset streams, and various settings) to the controller.
+	controlBuf *recvBuffer
+	fc         *inFlow
+	// sendQuotaPool provides flow control to outbound message.
+	sendQuotaPool *quotaPool
+
+	stats stats.Handler
+
+	// Flag to keep track of reading activity on transport.
+	// 1 is true and 0 is false.
+	activity uint32 // Accessed atomically.
+	// Keepalive and max-age parameters for the server.
+	kp keepalive.ServerParameters
+
+	mu            sync.Mutex // guard the following
+	state         transportState
+	activeStreams map[uint32]*Stream
+	// the per-stream outbound flow control window size set by the peer.
+	streamSendQuota uint32
+	// idle is the time instant when the connection went idle.
+	// This is either the begining of the connection or when the number of
+	// RPCs go down to 0.
+	// When the connection is busy, this value is set to 0.
+	idle time.Time
+}
+
+// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is
+// returned if something goes wrong.
+func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) {
+	framer := newFramer(conn)
+	// Send initial settings as connection preface to client.
+	var settings []http2.Setting
+	// TODO(zhaoq): Have a better way to signal "no limit" because 0 is
+	// permitted in the HTTP2 spec.
+	maxStreams := config.MaxStreams
+	if maxStreams == 0 {
+		maxStreams = math.MaxUint32
+	} else {
+		settings = append(settings, http2.Setting{
+			ID:  http2.SettingMaxConcurrentStreams,
+			Val: maxStreams,
+		})
+	}
+	if initialWindowSize != defaultWindowSize {
+		settings = append(settings, http2.Setting{
+			ID:  http2.SettingInitialWindowSize,
+			Val: uint32(initialWindowSize)})
+	}
+	if err := framer.writeSettings(true, settings...); err != nil {
+		return nil, connectionErrorf(true, err, "transport: %v", err)
+	}
+	// Adjust the connection flow control window if needed.
+	if delta := uint32(initialConnWindowSize - defaultWindowSize); delta > 0 {
+		if err := framer.writeWindowUpdate(true, 0, delta); err != nil {
+			return nil, connectionErrorf(true, err, "transport: %v", err)
+		}
+	}
+	kp := config.KeepaliveParams
+	if kp.MaxConnectionIdle == 0 {
+		kp.MaxConnectionIdle = defaultMaxConnectionIdle
+	}
+	if kp.MaxConnectionAge == 0 {
+		kp.MaxConnectionAge = defaultMaxConnectionAge
+	}
+	// Add a jitter to MaxConnectionAge.
+	kp.MaxConnectionAge += getJitter(kp.MaxConnectionAge)
+	if kp.MaxConnectionAgeGrace == 0 {
+		kp.MaxConnectionAgeGrace = defaultMaxConnectionAgeGrace
+	}
+	if kp.Time == 0 {
+		kp.Time = defaultServerKeepaliveTime
+	}
+	if kp.Timeout == 0 {
+		kp.Timeout = defaultServerKeepaliveTimeout
+	}
+	var buf bytes.Buffer
+	t := &http2Server{
+		ctx:             context.Background(),
+		conn:            conn,
+		remoteAddr:      conn.RemoteAddr(),
+		localAddr:       conn.LocalAddr(),
+		authInfo:        config.AuthInfo,
+		framer:          framer,
+		hBuf:            &buf,
+		hEnc:            hpack.NewEncoder(&buf),
+		maxStreams:      maxStreams,
+		inTapHandle:     config.InTapHandle,
+		controlBuf:      newRecvBuffer(),
+		fc:              &inFlow{limit: initialConnWindowSize},
+		sendQuotaPool:   newQuotaPool(defaultWindowSize),
+		state:           reachable,
+		writableChan:    make(chan int, 1),
+		shutdownChan:    make(chan struct{}),
+		activeStreams:   make(map[uint32]*Stream),
+		streamSendQuota: defaultWindowSize,
+		stats:           config.StatsHandler,
+		kp:              kp,
+		idle:            time.Now(),
+	}
+	if t.stats != nil {
+		t.ctx = t.stats.TagConn(t.ctx, &stats.ConnTagInfo{
+			RemoteAddr: t.remoteAddr,
+			LocalAddr:  t.localAddr,
+		})
+		connBegin := &stats.ConnBegin{}
+		t.stats.HandleConn(t.ctx, connBegin)
+	}
+	go t.controller()
+	go t.keepalive()
+	t.writableChan <- 0
+	return t, nil
+}
+
+// operateHeader takes action on the decoded headers.
+func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream), traceCtx func(context.Context, string) context.Context) (close bool) {
+	buf := newRecvBuffer()
+	s := &Stream{
+		id:  frame.Header().StreamID,
+		st:  t,
+		buf: buf,
+		fc:  &inFlow{limit: initialWindowSize},
+	}
+
+	var state decodeState
+	for _, hf := range frame.Fields {
+		state.processHeaderField(hf)
+	}
+	if err := state.err; err != nil {
+		if se, ok := err.(StreamError); ok {
+			t.controlBuf.put(&resetStream{s.id, statusCodeConvTab[se.Code]})
+		}
+		return
+	}
+
+	if frame.StreamEnded() {
+		// s is just created by the caller. No lock needed.
+		s.state = streamReadDone
+	}
+	s.recvCompress = state.encoding
+	if state.timeoutSet {
+		s.ctx, s.cancel = context.WithTimeout(t.ctx, state.timeout)
+	} else {
+		s.ctx, s.cancel = context.WithCancel(t.ctx)
+	}
+	pr := &peer.Peer{
+		Addr: t.remoteAddr,
+	}
+	// Attach Auth info if there is any.
+	if t.authInfo != nil {
+		pr.AuthInfo = t.authInfo
+	}
+	s.ctx = peer.NewContext(s.ctx, pr)
+	// Cache the current stream to the context so that the server application
+	// can find out. Required when the server wants to send some metadata
+	// back to the client (unary call only).
+	s.ctx = newContextWithStream(s.ctx, s)
+	// Attach the received metadata to the context.
+	if len(state.mdata) > 0 {
+		s.ctx = metadata.NewContext(s.ctx, state.mdata)
+	}
+
+	s.dec = &recvBufferReader{
+		ctx:  s.ctx,
+		recv: s.buf,
+	}
+	s.recvCompress = state.encoding
+	s.method = state.method
+	if t.inTapHandle != nil {
+		var err error
+		info := &tap.Info{
+			FullMethodName: state.method,
+		}
+		s.ctx, err = t.inTapHandle(s.ctx, info)
+		if err != nil {
+			// TODO: Log the real error.
+			t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream})
+			return
+		}
+	}
+	t.mu.Lock()
+	if t.state != reachable {
+		t.mu.Unlock()
+		return
+	}
+	if uint32(len(t.activeStreams)) >= t.maxStreams {
+		t.mu.Unlock()
+		t.controlBuf.put(&resetStream{s.id, http2.ErrCodeRefusedStream})
+		return
+	}
+	if s.id%2 != 1 || s.id <= t.maxStreamID {
+		t.mu.Unlock()
+		// illegal gRPC stream id.
+		grpclog.Println("transport: http2Server.HandleStreams received an illegal stream id: ", s.id)
+		return true
+	}
+	t.maxStreamID = s.id
+	s.sendQuotaPool = newQuotaPool(int(t.streamSendQuota))
+	t.activeStreams[s.id] = s
+	if len(t.activeStreams) == 1 {
+		t.idle = time.Time{}
+	}
+	t.mu.Unlock()
+	s.windowHandler = func(n int) {
+		t.updateWindow(s, uint32(n))
+	}
+	s.ctx = traceCtx(s.ctx, s.method)
+	if t.stats != nil {
+		s.ctx = t.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method})
+		inHeader := &stats.InHeader{
+			FullMethod:  s.method,
+			RemoteAddr:  t.remoteAddr,
+			LocalAddr:   t.localAddr,
+			Compression: s.recvCompress,
+			WireLength:  int(frame.Header().Length),
+		}
+		t.stats.HandleRPC(s.ctx, inHeader)
+	}
+	handle(s)
+	return
+}
+
+// HandleStreams receives incoming streams using the given handler. This is
+// typically run in a separate goroutine.
+// traceCtx attaches trace to ctx and returns the new context.
+func (t *http2Server) HandleStreams(handle func(*Stream), traceCtx func(context.Context, string) context.Context) {
+	// Check the validity of client preface.
+	preface := make([]byte, len(clientPreface))
+	if _, err := io.ReadFull(t.conn, preface); err != nil {
+		grpclog.Printf("transport: http2Server.HandleStreams failed to receive the preface from client: %v", err)
+		t.Close()
+		return
+	}
+	if !bytes.Equal(preface, clientPreface) {
+		grpclog.Printf("transport: http2Server.HandleStreams received bogus greeting from client: %q", preface)
+		t.Close()
+		return
+	}
+
+	frame, err := t.framer.readFrame()
+	if err == io.EOF || err == io.ErrUnexpectedEOF {
+		t.Close()
+		return
+	}
+	if err != nil {
+		grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err)
+		t.Close()
+		return
+	}
+	atomic.StoreUint32(&t.activity, 1)
+	sf, ok := frame.(*http2.SettingsFrame)
+	if !ok {
+		grpclog.Printf("transport: http2Server.HandleStreams saw invalid preface type %T from client", frame)
+		t.Close()
+		return
+	}
+	t.handleSettings(sf)
+
+	for {
+		frame, err := t.framer.readFrame()
+		atomic.StoreUint32(&t.activity, 1)
+		if err != nil {
+			if se, ok := err.(http2.StreamError); ok {
+				t.mu.Lock()
+				s := t.activeStreams[se.StreamID]
+				t.mu.Unlock()
+				if s != nil {
+					t.closeStream(s)
+				}
+				t.controlBuf.put(&resetStream{se.StreamID, se.Code})
+				continue
+			}
+			if err == io.EOF || err == io.ErrUnexpectedEOF {
+				t.Close()
+				return
+			}
+			grpclog.Printf("transport: http2Server.HandleStreams failed to read frame: %v", err)
+			t.Close()
+			return
+		}
+		switch frame := frame.(type) {
+		case *http2.MetaHeadersFrame:
+			if t.operateHeaders(frame, handle, traceCtx) {
+				t.Close()
+				break
+			}
+		case *http2.DataFrame:
+			t.handleData(frame)
+		case *http2.RSTStreamFrame:
+			t.handleRSTStream(frame)
+		case *http2.SettingsFrame:
+			t.handleSettings(frame)
+		case *http2.PingFrame:
+			t.handlePing(frame)
+		case *http2.WindowUpdateFrame:
+			t.handleWindowUpdate(frame)
+		case *http2.GoAwayFrame:
+			// TODO: Handle GoAway from the client appropriately.
+		default:
+			grpclog.Printf("transport: http2Server.HandleStreams found unhandled frame type %v.", frame)
+		}
+	}
+}
+
+func (t *http2Server) getStream(f http2.Frame) (*Stream, bool) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if t.activeStreams == nil {
+		// The transport is closing.
+		return nil, false
+	}
+	s, ok := t.activeStreams[f.Header().StreamID]
+	if !ok {
+		// The stream is already done.
+		return nil, false
+	}
+	return s, true
+}
+
+// updateWindow adjusts the inbound quota for the stream and the transport.
+// Window updates will deliver to the controller for sending when
+// the cumulative quota exceeds the corresponding threshold.
+func (t *http2Server) updateWindow(s *Stream, n uint32) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.state == streamDone {
+		return
+	}
+	if w := t.fc.onRead(n); w > 0 {
+		t.controlBuf.put(&windowUpdate{0, w})
+	}
+	if w := s.fc.onRead(n); w > 0 {
+		t.controlBuf.put(&windowUpdate{s.id, w})
+	}
+}
+
+func (t *http2Server) handleData(f *http2.DataFrame) {
+	size := f.Header().Length
+	if err := t.fc.onData(uint32(size)); err != nil {
+		grpclog.Printf("transport: http2Server %v", err)
+		t.Close()
+		return
+	}
+	// Select the right stream to dispatch.
+	s, ok := t.getStream(f)
+	if !ok {
+		if w := t.fc.onRead(uint32(size)); w > 0 {
+			t.controlBuf.put(&windowUpdate{0, w})
+		}
+		return
+	}
+	if size > 0 {
+		if f.Header().Flags.Has(http2.FlagDataPadded) {
+			if w := t.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
+				t.controlBuf.put(&windowUpdate{0, w})
+			}
+		}
+		s.mu.Lock()
+		if s.state == streamDone {
+			s.mu.Unlock()
+			// The stream has been closed. Release the corresponding quota.
+			if w := t.fc.onRead(uint32(size)); w > 0 {
+				t.controlBuf.put(&windowUpdate{0, w})
+			}
+			return
+		}
+		if err := s.fc.onData(uint32(size)); err != nil {
+			s.mu.Unlock()
+			t.closeStream(s)
+			t.controlBuf.put(&resetStream{s.id, http2.ErrCodeFlowControl})
+			return
+		}
+		if f.Header().Flags.Has(http2.FlagDataPadded) {
+			if w := s.fc.onRead(uint32(size) - uint32(len(f.Data()))); w > 0 {
+				t.controlBuf.put(&windowUpdate{s.id, w})
+			}
+		}
+		s.mu.Unlock()
+		// TODO(bradfitz, zhaoq): A copy is required here because there is no
+		// guarantee f.Data() is consumed before the arrival of next frame.
+		// Can this copy be eliminated?
+		if len(f.Data()) > 0 {
+			data := make([]byte, len(f.Data()))
+			copy(data, f.Data())
+			s.write(recvMsg{data: data})
+		}
+	}
+	if f.Header().Flags.Has(http2.FlagDataEndStream) {
+		// Received the end of stream from the client.
+		s.mu.Lock()
+		if s.state != streamDone {
+			s.state = streamReadDone
+		}
+		s.mu.Unlock()
+		s.write(recvMsg{err: io.EOF})
+	}
+}
+
+func (t *http2Server) handleRSTStream(f *http2.RSTStreamFrame) {
+	s, ok := t.getStream(f)
+	if !ok {
+		return
+	}
+	t.closeStream(s)
+}
+
+func (t *http2Server) handleSettings(f *http2.SettingsFrame) {
+	if f.IsAck() {
+		return
+	}
+	var ss []http2.Setting
+	f.ForeachSetting(func(s http2.Setting) error {
+		ss = append(ss, s)
+		return nil
+	})
+	// The settings will be applied once the ack is sent.
+	t.controlBuf.put(&settings{ack: true, ss: ss})
+}
+
+func (t *http2Server) handlePing(f *http2.PingFrame) {
+	if f.IsAck() { // Do nothing.
+		return
+	}
+	pingAck := &ping{ack: true}
+	copy(pingAck.data[:], f.Data[:])
+	t.controlBuf.put(pingAck)
+}
+
+func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) {
+	id := f.Header().StreamID
+	incr := f.Increment
+	if id == 0 {
+		t.sendQuotaPool.add(int(incr))
+		return
+	}
+	if s, ok := t.getStream(f); ok {
+		s.sendQuotaPool.add(int(incr))
+	}
+}
+
+func (t *http2Server) writeHeaders(s *Stream, b *bytes.Buffer, endStream bool) error {
+	first := true
+	endHeaders := false
+	var err error
+	// Sends the headers in a single batch.
+	for !endHeaders {
+		size := t.hBuf.Len()
+		if size > http2MaxFrameLen {
+			size = http2MaxFrameLen
+		} else {
+			endHeaders = true
+		}
+		if first {
+			p := http2.HeadersFrameParam{
+				StreamID:      s.id,
+				BlockFragment: b.Next(size),
+				EndStream:     endStream,
+				EndHeaders:    endHeaders,
+			}
+			err = t.framer.writeHeaders(endHeaders, p)
+			first = false
+		} else {
+			err = t.framer.writeContinuation(endHeaders, s.id, endHeaders, b.Next(size))
+		}
+		if err != nil {
+			t.Close()
+			return connectionErrorf(true, err, "transport: %v", err)
+		}
+	}
+	return nil
+}
+
+// WriteHeader sends the header metedata md back to the client.
+func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
+	s.mu.Lock()
+	if s.headerOk || s.state == streamDone {
+		s.mu.Unlock()
+		return ErrIllegalHeaderWrite
+	}
+	s.headerOk = true
+	if md.Len() > 0 {
+		if s.header.Len() > 0 {
+			s.header = metadata.Join(s.header, md)
+		} else {
+			s.header = md
+		}
+	}
+	md = s.header
+	s.mu.Unlock()
+	if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
+		return err
+	}
+	t.hBuf.Reset()
+	t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
+	if s.sendCompress != "" {
+		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
+	}
+	for k, v := range md {
+		if isReservedHeader(k) {
+			// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
+			continue
+		}
+		for _, entry := range v {
+			t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
+		}
+	}
+	bufLen := t.hBuf.Len()
+	if err := t.writeHeaders(s, t.hBuf, false); err != nil {
+		return err
+	}
+	if t.stats != nil {
+		outHeader := &stats.OutHeader{
+			WireLength: bufLen,
+		}
+		t.stats.HandleRPC(s.Context(), outHeader)
+	}
+	t.writableChan <- 0
+	return nil
+}
+
+// WriteStatus sends stream status to the client and terminates the stream.
+// There is no further I/O operations being able to perform on this stream.
+// TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early
+// OK is adopted.
+func (t *http2Server) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error {
+	var headersSent, hasHeader bool
+	s.mu.Lock()
+	if s.state == streamDone {
+		s.mu.Unlock()
+		return nil
+	}
+	if s.headerOk {
+		headersSent = true
+	}
+	if s.header.Len() > 0 {
+		hasHeader = true
+	}
+	s.mu.Unlock()
+
+	if !headersSent && hasHeader {
+		t.WriteHeader(s, nil)
+		headersSent = true
+	}
+
+	if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
+		return err
+	}
+	t.hBuf.Reset()
+	if !headersSent {
+		t.hEnc.WriteField(hpack.HeaderField{Name: ":status", Value: "200"})
+		t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
+	}
+	t.hEnc.WriteField(
+		hpack.HeaderField{
+			Name:  "grpc-status",
+			Value: strconv.Itoa(int(statusCode)),
+		})
+	t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(statusDesc)})
+	// Attach the trailer metadata.
+	for k, v := range s.trailer {
+		// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
+		if isReservedHeader(k) {
+			continue
+		}
+		for _, entry := range v {
+			t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: entry})
+		}
+	}
+	bufLen := t.hBuf.Len()
+	if err := t.writeHeaders(s, t.hBuf, true); err != nil {
+		t.Close()
+		return err
+	}
+	if t.stats != nil {
+		outTrailer := &stats.OutTrailer{
+			WireLength: bufLen,
+		}
+		t.stats.HandleRPC(s.Context(), outTrailer)
+	}
+	t.closeStream(s)
+	t.writableChan <- 0
+	return nil
+}
+
+// Write converts the data into HTTP2 data frame and sends it out. Non-nil error
+// is returns if it fails (e.g., framing error, transport error).
+func (t *http2Server) Write(s *Stream, data []byte, opts *Options) error {
+	// TODO(zhaoq): Support multi-writers for a single stream.
+	var writeHeaderFrame bool
+	s.mu.Lock()
+	if s.state == streamDone {
+		s.mu.Unlock()
+		return streamErrorf(codes.Unknown, "the stream has been done")
+	}
+	if !s.headerOk {
+		writeHeaderFrame = true
+	}
+	s.mu.Unlock()
+	if writeHeaderFrame {
+		t.WriteHeader(s, nil)
+	}
+	r := bytes.NewBuffer(data)
+	for {
+		if r.Len() == 0 {
+			return nil
+		}
+		size := http2MaxFrameLen
+		// Wait until the stream has some quota to send the data.
+		sq, err := wait(s.ctx, nil, nil, t.shutdownChan, s.sendQuotaPool.acquire())
+		if err != nil {
+			return err
+		}
+		// Wait until the transport has some quota to send the data.
+		tq, err := wait(s.ctx, nil, nil, t.shutdownChan, t.sendQuotaPool.acquire())
+		if err != nil {
+			return err
+		}
+		if sq < size {
+			size = sq
+		}
+		if tq < size {
+			size = tq
+		}
+		p := r.Next(size)
+		ps := len(p)
+		if ps < sq {
+			// Overbooked stream quota. Return it back.
+			s.sendQuotaPool.add(sq - ps)
+		}
+		if ps < tq {
+			// Overbooked transport quota. Return it back.
+			t.sendQuotaPool.add(tq - ps)
+		}
+		t.framer.adjustNumWriters(1)
+		// Got some quota. Try to acquire writing privilege on the
+		// transport.
+		if _, err := wait(s.ctx, nil, nil, t.shutdownChan, t.writableChan); err != nil {
+			if _, ok := err.(StreamError); ok {
+				// Return the connection quota back.
+				t.sendQuotaPool.add(ps)
+			}
+			if t.framer.adjustNumWriters(-1) == 0 {
+				// This writer is the last one in this batch and has the
+				// responsibility to flush the buffered frames. It queues
+				// a flush request to controlBuf instead of flushing directly
+				// in order to avoid the race with other writing or flushing.
+				t.controlBuf.put(&flushIO{})
+			}
+			return err
+		}
+		select {
+		case <-s.ctx.Done():
+			t.sendQuotaPool.add(ps)
+			if t.framer.adjustNumWriters(-1) == 0 {
+				t.controlBuf.put(&flushIO{})
+			}
+			t.writableChan <- 0
+			return ContextErr(s.ctx.Err())
+		default:
+		}
+		var forceFlush bool
+		if r.Len() == 0 && t.framer.adjustNumWriters(0) == 1 && !opts.Last {
+			forceFlush = true
+		}
+		if err := t.framer.writeData(forceFlush, s.id, false, p); err != nil {
+			t.Close()
+			return connectionErrorf(true, err, "transport: %v", err)
+		}
+		if t.framer.adjustNumWriters(-1) == 0 {
+			t.framer.flushWrite()
+		}
+		t.writableChan <- 0
+	}
+
+}
+
+func (t *http2Server) applySettings(ss []http2.Setting) {
+	for _, s := range ss {
+		if s.ID == http2.SettingInitialWindowSize {
+			t.mu.Lock()
+			defer t.mu.Unlock()
+			for _, stream := range t.activeStreams {
+				stream.sendQuotaPool.add(int(s.Val - t.streamSendQuota))
+			}
+			t.streamSendQuota = s.Val
+		}
+
+	}
+}
+
+// keepalive running in a separate goroutine does the following:
+// 1. Gracefully closes an idle connection after a duration of keepalive.MaxConnectionIdle.
+// 2. Gracefully closes any connection after a duration of keepalive.MaxConnectionAge.
+// 3. Forcibly closes a connection after an additive period of keepalive.MaxConnectionAgeGrace over keepalive.MaxConnectionAge.
+// 4. Makes sure a connection is alive by sending pings with a frequency of keepalive.Time and closes a non-resposive connection
+// after an additional duration of keepalive.Timeout.
+func (t *http2Server) keepalive() {
+	p := &ping{}
+	var pingSent bool
+	maxIdle := time.NewTimer(t.kp.MaxConnectionIdle)
+	maxAge := time.NewTimer(t.kp.MaxConnectionAge)
+	keepalive := time.NewTimer(t.kp.Time)
+	// NOTE: All exit paths of this function should reset their
+	// respecitve timers. A failure to do so will cause the
+	// following clean-up to deadlock and eventually leak.
+	defer func() {
+		if !maxIdle.Stop() {
+			<-maxIdle.C
+		}
+		if !maxAge.Stop() {
+			<-maxAge.C
+		}
+		if !keepalive.Stop() {
+			<-keepalive.C
+		}
+	}()
+	for {
+		select {
+		case <-maxIdle.C:
+			t.mu.Lock()
+			idle := t.idle
+			if idle.IsZero() { // The connection is non-idle.
+				t.mu.Unlock()
+				maxIdle.Reset(t.kp.MaxConnectionIdle)
+				continue
+			}
+			val := t.kp.MaxConnectionIdle - time.Since(idle)
+			if val <= 0 {
+				// The connection has been idle for a duration of keepalive.MaxConnectionIdle or more.
+				// Gracefully close the connection.
+				t.state = draining
+				t.mu.Unlock()
+				t.Drain()
+				// Reseting the timer so that the clean-up doesn't deadlock.
+				maxIdle.Reset(infinity)
+				return
+			}
+			t.mu.Unlock()
+			maxIdle.Reset(val)
+		case <-maxAge.C:
+			t.mu.Lock()
+			t.state = draining
+			t.mu.Unlock()
+			t.Drain()
+			maxAge.Reset(t.kp.MaxConnectionAgeGrace)
+			select {
+			case <-maxAge.C:
+				// Close the connection after grace period.
+				t.Close()
+				// Reseting the timer so that the clean-up doesn't deadlock.
+				maxAge.Reset(infinity)
+			case <-t.shutdownChan:
+			}
+			return
+		case <-keepalive.C:
+			if atomic.CompareAndSwapUint32(&t.activity, 1, 0) {
+				pingSent = false
+				keepalive.Reset(t.kp.Time)
+				continue
+			}
+			if pingSent {
+				t.Close()
+				// Reseting the timer so that the clean-up doesn't deadlock.
+				keepalive.Reset(infinity)
+				return
+			}
+			pingSent = true
+			t.controlBuf.put(p)
+			keepalive.Reset(t.kp.Timeout)
+		case <-t.shutdownChan:
+			return
+		}
+	}
+}
+
+// controller running in a separate goroutine takes charge of sending control
+// frames (e.g., window update, reset stream, setting, etc.) to the server.
+func (t *http2Server) controller() {
+	for {
+		select {
+		case i := <-t.controlBuf.get():
+			t.controlBuf.load()
+			select {
+			case <-t.writableChan:
+				switch i := i.(type) {
+				case *windowUpdate:
+					t.framer.writeWindowUpdate(true, i.streamID, i.increment)
+				case *settings:
+					if i.ack {
+						t.framer.writeSettingsAck(true)
+						t.applySettings(i.ss)
+					} else {
+						t.framer.writeSettings(true, i.ss...)
+					}
+				case *resetStream:
+					t.framer.writeRSTStream(true, i.streamID, i.code)
+				case *goAway:
+					t.mu.Lock()
+					if t.state == closing {
+						t.mu.Unlock()
+						// The transport is closing.
+						return
+					}
+					sid := t.maxStreamID
+					t.state = draining
+					t.mu.Unlock()
+					t.framer.writeGoAway(true, sid, http2.ErrCodeNo, nil)
+				case *flushIO:
+					t.framer.flushWrite()
+				case *ping:
+					t.framer.writePing(true, i.ack, i.data)
+				default:
+					grpclog.Printf("transport: http2Server.controller got unexpected item type %v\n", i)
+				}
+				t.writableChan <- 0
+				continue
+			case <-t.shutdownChan:
+				return
+			}
+		case <-t.shutdownChan:
+			return
+		}
+	}
+}
+
+// Close starts shutting down the http2Server transport.
+// TODO(zhaoq): Now the destruction is not blocked on any pending streams. This
+// could cause some resource issue. Revisit this later.
+func (t *http2Server) Close() (err error) {
+	t.mu.Lock()
+	if t.state == closing {
+		t.mu.Unlock()
+		return errors.New("transport: Close() was already called")
+	}
+	t.state = closing
+	streams := t.activeStreams
+	t.activeStreams = nil
+	t.mu.Unlock()
+	close(t.shutdownChan)
+	err = t.conn.Close()
+	// Cancel all active streams.
+	for _, s := range streams {
+		s.cancel()
+	}
+	if t.stats != nil {
+		connEnd := &stats.ConnEnd{}
+		t.stats.HandleConn(t.ctx, connEnd)
+	}
+	return
+}
+
+// closeStream clears the footprint of a stream when the stream is not needed
+// any more.
+func (t *http2Server) closeStream(s *Stream) {
+	t.mu.Lock()
+	delete(t.activeStreams, s.id)
+	if len(t.activeStreams) == 0 {
+		t.idle = time.Now()
+	}
+	if t.state == draining && len(t.activeStreams) == 0 {
+		defer t.Close()
+	}
+	t.mu.Unlock()
+	// In case stream sending and receiving are invoked in separate
+	// goroutines (e.g., bi-directional streaming), cancel needs to be
+	// called to interrupt the potential blocking on other goroutines.
+	s.cancel()
+	s.mu.Lock()
+	if q := s.fc.resetPendingData(); q > 0 {
+		if w := t.fc.onRead(q); w > 0 {
+			t.controlBuf.put(&windowUpdate{0, w})
+		}
+	}
+	if s.state == streamDone {
+		s.mu.Unlock()
+		return
+	}
+	s.state = streamDone
+	s.mu.Unlock()
+}
+
+func (t *http2Server) RemoteAddr() net.Addr {
+	return t.remoteAddr
+}
+
+func (t *http2Server) Drain() {
+	t.controlBuf.put(&goAway{})
+}
+
+var rgen = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+func getJitter(v time.Duration) time.Duration {
+	if v == infinity {
+		return 0
+	}
+	// Generate a jitter between +/- 10% of the value.
+	r := int64(v / 10)
+	j := rgen.Int63n(2*r) - r
+	return time.Duration(j)
+}
diff --git a/vendor/google.golang.org/grpc/transport/http_util.go b/vendor/google.golang.org/grpc/transport/http_util.go
new file mode 100644
index 00000000000..6ce43c332e6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/http_util.go
@@ -0,0 +1,511 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+	"sync/atomic"
+	"time"
+
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/hpack"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/metadata"
+)
+
+const (
+	// http2MaxFrameLen specifies the max length of a HTTP2 frame.
+	http2MaxFrameLen = 16384 // 16KB frame
+	// http://http2.github.io/http2-spec/#SettingValues
+	http2InitHeaderTableSize = 4096
+	// http2IOBufSize specifies the buffer size for sending frames.
+	http2IOBufSize = 32 * 1024
+)
+
+var (
+	clientPreface   = []byte(http2.ClientPreface)
+	http2ErrConvTab = map[http2.ErrCode]codes.Code{
+		http2.ErrCodeNo:                 codes.Internal,
+		http2.ErrCodeProtocol:           codes.Internal,
+		http2.ErrCodeInternal:           codes.Internal,
+		http2.ErrCodeFlowControl:        codes.ResourceExhausted,
+		http2.ErrCodeSettingsTimeout:    codes.Internal,
+		http2.ErrCodeStreamClosed:       codes.Internal,
+		http2.ErrCodeFrameSize:          codes.Internal,
+		http2.ErrCodeRefusedStream:      codes.Unavailable,
+		http2.ErrCodeCancel:             codes.Canceled,
+		http2.ErrCodeCompression:        codes.Internal,
+		http2.ErrCodeConnect:            codes.Internal,
+		http2.ErrCodeEnhanceYourCalm:    codes.ResourceExhausted,
+		http2.ErrCodeInadequateSecurity: codes.PermissionDenied,
+		http2.ErrCodeHTTP11Required:     codes.FailedPrecondition,
+	}
+	statusCodeConvTab = map[codes.Code]http2.ErrCode{
+		codes.Internal:          http2.ErrCodeInternal,
+		codes.Canceled:          http2.ErrCodeCancel,
+		codes.Unavailable:       http2.ErrCodeRefusedStream,
+		codes.ResourceExhausted: http2.ErrCodeEnhanceYourCalm,
+		codes.PermissionDenied:  http2.ErrCodeInadequateSecurity,
+	}
+)
+
+// Records the states during HPACK decoding. Must be reset once the
+// decoding of the entire headers are finished.
+type decodeState struct {
+	err error // first error encountered decoding
+
+	encoding string
+	// statusCode caches the stream status received from the trailer
+	// the server sent. Client side only.
+	statusCode codes.Code
+	statusDesc string
+	// Server side only fields.
+	timeoutSet bool
+	timeout    time.Duration
+	method     string
+	// key-value metadata map from the peer.
+	mdata map[string][]string
+}
+
+// isReservedHeader checks whether hdr belongs to HTTP2 headers
+// reserved by gRPC protocol. Any other headers are classified as the
+// user-specified metadata.
+func isReservedHeader(hdr string) bool {
+	if hdr != "" && hdr[0] == ':' {
+		return true
+	}
+	switch hdr {
+	case "content-type",
+		"grpc-message-type",
+		"grpc-encoding",
+		"grpc-message",
+		"grpc-status",
+		"grpc-timeout",
+		"te":
+		return true
+	default:
+		return false
+	}
+}
+
+// isWhitelistedPseudoHeader checks whether hdr belongs to HTTP2 pseudoheaders
+// that should be propagated into metadata visible to users.
+func isWhitelistedPseudoHeader(hdr string) bool {
+	switch hdr {
+	case ":authority":
+		return true
+	default:
+		return false
+	}
+}
+
+func (d *decodeState) setErr(err error) {
+	if d.err == nil {
+		d.err = err
+	}
+}
+
+func validContentType(t string) bool {
+	e := "application/grpc"
+	if !strings.HasPrefix(t, e) {
+		return false
+	}
+	// Support variations on the content-type
+	// (e.g. "application/grpc+blah", "application/grpc;blah").
+	if len(t) > len(e) && t[len(e)] != '+' && t[len(e)] != ';' {
+		return false
+	}
+	return true
+}
+
+func (d *decodeState) processHeaderField(f hpack.HeaderField) {
+	switch f.Name {
+	case "content-type":
+		if !validContentType(f.Value) {
+			d.setErr(streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value))
+			return
+		}
+	case "grpc-encoding":
+		d.encoding = f.Value
+	case "grpc-status":
+		code, err := strconv.Atoi(f.Value)
+		if err != nil {
+			d.setErr(streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err))
+			return
+		}
+		d.statusCode = codes.Code(code)
+	case "grpc-message":
+		d.statusDesc = decodeGrpcMessage(f.Value)
+	case "grpc-timeout":
+		d.timeoutSet = true
+		var err error
+		d.timeout, err = decodeTimeout(f.Value)
+		if err != nil {
+			d.setErr(streamErrorf(codes.Internal, "transport: malformed time-out: %v", err))
+			return
+		}
+	case ":path":
+		d.method = f.Value
+	default:
+		if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) {
+			if f.Name == "user-agent" {
+				i := strings.LastIndex(f.Value, " ")
+				if i == -1 {
+					// There is no application user agent string being set.
+					return
+				}
+				// Extract the application user agent string.
+				f.Value = f.Value[:i]
+			}
+			if d.mdata == nil {
+				d.mdata = make(map[string][]string)
+			}
+			k, v, err := metadata.DecodeKeyValue(f.Name, f.Value)
+			if err != nil {
+				grpclog.Printf("Failed to decode (%q, %q): %v", f.Name, f.Value, err)
+				return
+			}
+			d.mdata[k] = append(d.mdata[k], v)
+		}
+	}
+}
+
+type timeoutUnit uint8
+
+const (
+	hour        timeoutUnit = 'H'
+	minute      timeoutUnit = 'M'
+	second      timeoutUnit = 'S'
+	millisecond timeoutUnit = 'm'
+	microsecond timeoutUnit = 'u'
+	nanosecond  timeoutUnit = 'n'
+)
+
+func timeoutUnitToDuration(u timeoutUnit) (d time.Duration, ok bool) {
+	switch u {
+	case hour:
+		return time.Hour, true
+	case minute:
+		return time.Minute, true
+	case second:
+		return time.Second, true
+	case millisecond:
+		return time.Millisecond, true
+	case microsecond:
+		return time.Microsecond, true
+	case nanosecond:
+		return time.Nanosecond, true
+	default:
+	}
+	return
+}
+
+const maxTimeoutValue int64 = 100000000 - 1
+
+// div does integer division and round-up the result. Note that this is
+// equivalent to (d+r-1)/r but has less chance to overflow.
+func div(d, r time.Duration) int64 {
+	if m := d % r; m > 0 {
+		return int64(d/r + 1)
+	}
+	return int64(d / r)
+}
+
+// TODO(zhaoq): It is the simplistic and not bandwidth efficient. Improve it.
+func encodeTimeout(t time.Duration) string {
+	if t <= 0 {
+		return "0n"
+	}
+	if d := div(t, time.Nanosecond); d <= maxTimeoutValue {
+		return strconv.FormatInt(d, 10) + "n"
+	}
+	if d := div(t, time.Microsecond); d <= maxTimeoutValue {
+		return strconv.FormatInt(d, 10) + "u"
+	}
+	if d := div(t, time.Millisecond); d <= maxTimeoutValue {
+		return strconv.FormatInt(d, 10) + "m"
+	}
+	if d := div(t, time.Second); d <= maxTimeoutValue {
+		return strconv.FormatInt(d, 10) + "S"
+	}
+	if d := div(t, time.Minute); d <= maxTimeoutValue {
+		return strconv.FormatInt(d, 10) + "M"
+	}
+	// Note that maxTimeoutValue * time.Hour > MaxInt64.
+	return strconv.FormatInt(div(t, time.Hour), 10) + "H"
+}
+
+func decodeTimeout(s string) (time.Duration, error) {
+	size := len(s)
+	if size < 2 {
+		return 0, fmt.Errorf("transport: timeout string is too short: %q", s)
+	}
+	unit := timeoutUnit(s[size-1])
+	d, ok := timeoutUnitToDuration(unit)
+	if !ok {
+		return 0, fmt.Errorf("transport: timeout unit is not recognized: %q", s)
+	}
+	t, err := strconv.ParseInt(s[:size-1], 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return d * time.Duration(t), nil
+}
+
+const (
+	spaceByte   = ' '
+	tildaByte   = '~'
+	percentByte = '%'
+)
+
+// encodeGrpcMessage is used to encode status code in header field
+// "grpc-message".
+// It checks to see if each individual byte in msg is an
+// allowable byte, and then either percent encoding or passing it through.
+// When percent encoding, the byte is converted into hexadecimal notation
+// with a '%' prepended.
+func encodeGrpcMessage(msg string) string {
+	if msg == "" {
+		return ""
+	}
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if !(c >= spaceByte && c < tildaByte && c != percentByte) {
+			return encodeGrpcMessageUnchecked(msg)
+		}
+	}
+	return msg
+}
+
+func encodeGrpcMessageUnchecked(msg string) string {
+	var buf bytes.Buffer
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if c >= spaceByte && c < tildaByte && c != percentByte {
+			buf.WriteByte(c)
+		} else {
+			buf.WriteString(fmt.Sprintf("%%%02X", c))
+		}
+	}
+	return buf.String()
+}
+
+// decodeGrpcMessage decodes the msg encoded by encodeGrpcMessage.
+func decodeGrpcMessage(msg string) string {
+	if msg == "" {
+		return ""
+	}
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		if msg[i] == percentByte && i+2 < lenMsg {
+			return decodeGrpcMessageUnchecked(msg)
+		}
+	}
+	return msg
+}
+
+func decodeGrpcMessageUnchecked(msg string) string {
+	var buf bytes.Buffer
+	lenMsg := len(msg)
+	for i := 0; i < lenMsg; i++ {
+		c := msg[i]
+		if c == percentByte && i+2 < lenMsg {
+			parsed, err := strconv.ParseUint(msg[i+1:i+3], 16, 8)
+			if err != nil {
+				buf.WriteByte(c)
+			} else {
+				buf.WriteByte(byte(parsed))
+				i += 2
+			}
+		} else {
+			buf.WriteByte(c)
+		}
+	}
+	return buf.String()
+}
+
+type framer struct {
+	numWriters int32
+	reader     io.Reader
+	writer     *bufio.Writer
+	fr         *http2.Framer
+}
+
+func newFramer(conn net.Conn) *framer {
+	f := &framer{
+		reader: bufio.NewReaderSize(conn, http2IOBufSize),
+		writer: bufio.NewWriterSize(conn, http2IOBufSize),
+	}
+	f.fr = http2.NewFramer(f.writer, f.reader)
+	f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil)
+	return f
+}
+
+func (f *framer) adjustNumWriters(i int32) int32 {
+	return atomic.AddInt32(&f.numWriters, i)
+}
+
+// The following writeXXX functions can only be called when the caller gets
+// unblocked from writableChan channel (i.e., owns the privilege to write).
+
+func (f *framer) writeContinuation(forceFlush bool, streamID uint32, endHeaders bool, headerBlockFragment []byte) error {
+	if err := f.fr.WriteContinuation(streamID, endHeaders, headerBlockFragment); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeData(forceFlush bool, streamID uint32, endStream bool, data []byte) error {
+	if err := f.fr.WriteData(streamID, endStream, data); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeGoAway(forceFlush bool, maxStreamID uint32, code http2.ErrCode, debugData []byte) error {
+	if err := f.fr.WriteGoAway(maxStreamID, code, debugData); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeHeaders(forceFlush bool, p http2.HeadersFrameParam) error {
+	if err := f.fr.WriteHeaders(p); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writePing(forceFlush, ack bool, data [8]byte) error {
+	if err := f.fr.WritePing(ack, data); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writePriority(forceFlush bool, streamID uint32, p http2.PriorityParam) error {
+	if err := f.fr.WritePriority(streamID, p); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writePushPromise(forceFlush bool, p http2.PushPromiseParam) error {
+	if err := f.fr.WritePushPromise(p); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeRSTStream(forceFlush bool, streamID uint32, code http2.ErrCode) error {
+	if err := f.fr.WriteRSTStream(streamID, code); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeSettings(forceFlush bool, settings ...http2.Setting) error {
+	if err := f.fr.WriteSettings(settings...); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeSettingsAck(forceFlush bool) error {
+	if err := f.fr.WriteSettingsAck(); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) writeWindowUpdate(forceFlush bool, streamID, incr uint32) error {
+	if err := f.fr.WriteWindowUpdate(streamID, incr); err != nil {
+		return err
+	}
+	if forceFlush {
+		return f.writer.Flush()
+	}
+	return nil
+}
+
+func (f *framer) flushWrite() error {
+	return f.writer.Flush()
+}
+
+func (f *framer) readFrame() (http2.Frame, error) {
+	return f.fr.ReadFrame()
+}
+
+func (f *framer) errorDetail() error {
+	return f.fr.ErrorDetail()
+}
diff --git a/vendor/google.golang.org/grpc/transport/http_util_test.go b/vendor/google.golang.org/grpc/transport/http_util_test.go
new file mode 100644
index 00000000000..a5f8a85f7f4
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/http_util_test.go
@@ -0,0 +1,145 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"fmt"
+	"testing"
+	"time"
+)
+
+func TestTimeoutEncode(t *testing.T) {
+	for _, test := range []struct {
+		in  string
+		out string
+	}{
+		{"12345678ns", "12345678n"},
+		{"123456789ns", "123457u"},
+		{"12345678us", "12345678u"},
+		{"123456789us", "123457m"},
+		{"12345678ms", "12345678m"},
+		{"123456789ms", "123457S"},
+		{"12345678s", "12345678S"},
+		{"123456789s", "2057614M"},
+		{"12345678m", "12345678M"},
+		{"123456789m", "2057614H"},
+	} {
+		d, err := time.ParseDuration(test.in)
+		if err != nil {
+			t.Fatalf("failed to parse duration string %s: %v", test.in, err)
+		}
+		out := encodeTimeout(d)
+		if out != test.out {
+			t.Fatalf("timeoutEncode(%s) = %s, want %s", test.in, out, test.out)
+		}
+	}
+}
+
+func TestTimeoutDecode(t *testing.T) {
+	for _, test := range []struct {
+		// input
+		s string
+		// output
+		d   time.Duration
+		err error
+	}{
+		{"1234S", time.Second * 1234, nil},
+		{"1234x", 0, fmt.Errorf("transport: timeout unit is not recognized: %q", "1234x")},
+		{"1", 0, fmt.Errorf("transport: timeout string is too short: %q", "1")},
+		{"", 0, fmt.Errorf("transport: timeout string is too short: %q", "")},
+	} {
+		d, err := decodeTimeout(test.s)
+		if d != test.d || fmt.Sprint(err) != fmt.Sprint(test.err) {
+			t.Fatalf("timeoutDecode(%q) = %d, %v, want %d, %v", test.s, int64(d), err, int64(test.d), test.err)
+		}
+	}
+}
+
+func TestValidContentType(t *testing.T) {
+	tests := []struct {
+		h    string
+		want bool
+	}{
+		{"application/grpc", true},
+		{"application/grpc+", true},
+		{"application/grpc+blah", true},
+		{"application/grpc;", true},
+		{"application/grpc;blah", true},
+		{"application/grpcd", false},
+		{"application/grpd", false},
+		{"application/grp", false},
+	}
+	for _, tt := range tests {
+		got := validContentType(tt.h)
+		if got != tt.want {
+			t.Errorf("validContentType(%q) = %v; want %v", tt.h, got, tt.want)
+		}
+	}
+}
+
+func TestEncodeGrpcMessage(t *testing.T) {
+	for _, tt := range []struct {
+		input    string
+		expected string
+	}{
+		{"", ""},
+		{"Hello", "Hello"},
+		{"my favorite character is \u0000", "my favorite character is %00"},
+		{"my favorite character is %", "my favorite character is %25"},
+	} {
+		actual := encodeGrpcMessage(tt.input)
+		if tt.expected != actual {
+			t.Errorf("encodeGrpcMessage(%v) = %v, want %v", tt.input, actual, tt.expected)
+		}
+	}
+}
+
+func TestDecodeGrpcMessage(t *testing.T) {
+	for _, tt := range []struct {
+		input    string
+		expected string
+	}{
+		{"", ""},
+		{"Hello", "Hello"},
+		{"H%61o", "Hao"},
+		{"H%6", "H%6"},
+		{"%G0", "%G0"},
+		{"%E7%B3%BB%E7%BB%9F", "系统"},
+	} {
+		actual := decodeGrpcMessage(tt.input)
+		if tt.expected != actual {
+			t.Errorf("dncodeGrpcMessage(%v) = %v, want %v", tt.input, actual, tt.expected)
+		}
+	}
+}
diff --git a/vendor/google.golang.org/grpc/transport/testdata/ca.pem b/vendor/google.golang.org/grpc/transport/testdata/ca.pem
new file mode 100644
index 00000000000..6c8511a73c6
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/testdata/ca.pem
@@ -0,0 +1,15 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/transport/testdata/server1.key b/vendor/google.golang.org/grpc/transport/testdata/server1.key
new file mode 100644
index 00000000000..143a5b87658
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/testdata/server1.key
@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/vendor/google.golang.org/grpc/transport/testdata/server1.pem b/vendor/google.golang.org/grpc/transport/testdata/server1.pem
new file mode 100644
index 00000000000..f3d43fcc5be
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/testdata/server1.pem
@@ -0,0 +1,16 @@
+-----BEGIN CERTIFICATE-----
+MIICnDCCAgWgAwIBAgIBBzANBgkqhkiG9w0BAQsFADBWMQswCQYDVQQGEwJBVTET
+MBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50ZXJuZXQgV2lkZ2l0cyBQ
+dHkgTHRkMQ8wDQYDVQQDEwZ0ZXN0Y2EwHhcNMTUxMTA0MDIyMDI0WhcNMjUxMTAx
+MDIyMDI0WjBlMQswCQYDVQQGEwJVUzERMA8GA1UECBMISWxsaW5vaXMxEDAOBgNV
+BAcTB0NoaWNhZ28xFTATBgNVBAoTDEV4YW1wbGUsIENvLjEaMBgGA1UEAxQRKi50
+ZXN0Lmdvb2dsZS5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAOHDFSco
+LCVJpYDDM4HYtIdV6Ake/sMNaaKdODjDMsux/4tDydlumN+fm+AjPEK5GHhGn1Bg
+zkWF+slf3BxhrA/8dNsnunstVA7ZBgA/5qQxMfGAq4wHNVX77fBZOgp9VlSMVfyd
+9N8YwbBYAckOeUQadTi2X1S6OgJXgQ0m3MWhAgMBAAGjazBpMAkGA1UdEwQCMAAw
+CwYDVR0PBAQDAgXgME8GA1UdEQRIMEaCECoudGVzdC5nb29nbGUuZnKCGHdhdGVy
+em9vaS50ZXN0Lmdvb2dsZS5iZYISKi50ZXN0LnlvdXR1YmUuY29thwTAqAEDMA0G
+CSqGSIb3DQEBCwUAA4GBAJFXVifQNub1LUP4JlnX5lXNlo8FxZ2a12AFQs+bzoJ6
+hM044EDjqyxUqSbVePK0ni3w1fHQB5rY9yYC5f8G7aqqTY1QOhoUk8ZTSTRpnkTh
+y4jjdvTZeLDVBlueZUTDRmy2feY5aZIU18vFDK08dTG0A87pppuv1LNIR3loveU8
+-----END CERTIFICATE-----
diff --git a/vendor/google.golang.org/grpc/transport/transport.go b/vendor/google.golang.org/grpc/transport/transport.go
new file mode 100644
index 00000000000..51d71e39484
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/transport.go
@@ -0,0 +1,621 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/*
+Package transport defines and implements message oriented communication channel
+to complete various transactions (e.g., an RPC).
+*/
+package transport // import "google.golang.org/grpc/transport"
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net"
+	"sync"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/tap"
+)
+
+// recvMsg represents the received msg from the transport. All transport
+// protocol specific info has been removed.
+type recvMsg struct {
+	data []byte
+	// nil: received some data
+	// io.EOF: stream is completed. data is nil.
+	// other non-nil error: transport failure. data is nil.
+	err error
+}
+
+func (*recvMsg) item() {}
+
+// All items in an out of a recvBuffer should be the same type.
+type item interface {
+	item()
+}
+
+// recvBuffer is an unbounded channel of item.
+type recvBuffer struct {
+	c       chan item
+	mu      sync.Mutex
+	backlog []item
+}
+
+func newRecvBuffer() *recvBuffer {
+	b := &recvBuffer{
+		c: make(chan item, 1),
+	}
+	return b
+}
+
+func (b *recvBuffer) put(r item) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if len(b.backlog) == 0 {
+		select {
+		case b.c <- r:
+			return
+		default:
+		}
+	}
+	b.backlog = append(b.backlog, r)
+}
+
+func (b *recvBuffer) load() {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if len(b.backlog) > 0 {
+		select {
+		case b.c <- b.backlog[0]:
+			b.backlog = b.backlog[1:]
+		default:
+		}
+	}
+}
+
+// get returns the channel that receives an item in the buffer.
+//
+// Upon receipt of an item, the caller should call load to send another
+// item onto the channel if there is any.
+func (b *recvBuffer) get() <-chan item {
+	return b.c
+}
+
+// recvBufferReader implements io.Reader interface to read the data from
+// recvBuffer.
+type recvBufferReader struct {
+	ctx    context.Context
+	goAway chan struct{}
+	recv   *recvBuffer
+	last   *bytes.Reader // Stores the remaining data in the previous calls.
+	err    error
+}
+
+// Read reads the next len(p) bytes from last. If last is drained, it tries to
+// read additional data from recv. It blocks if there no additional data available
+// in recv. If Read returns any non-nil error, it will continue to return that error.
+func (r *recvBufferReader) Read(p []byte) (n int, err error) {
+	if r.err != nil {
+		return 0, r.err
+	}
+	defer func() { r.err = err }()
+	if r.last != nil && r.last.Len() > 0 {
+		// Read remaining data left in last call.
+		return r.last.Read(p)
+	}
+	select {
+	case <-r.ctx.Done():
+		return 0, ContextErr(r.ctx.Err())
+	case <-r.goAway:
+		return 0, ErrStreamDrain
+	case i := <-r.recv.get():
+		r.recv.load()
+		m := i.(*recvMsg)
+		if m.err != nil {
+			return 0, m.err
+		}
+		r.last = bytes.NewReader(m.data)
+		return r.last.Read(p)
+	}
+}
+
+type streamState uint8
+
+const (
+	streamActive    streamState = iota
+	streamWriteDone             // EndStream sent
+	streamReadDone              // EndStream received
+	streamDone                  // the entire stream is finished.
+)
+
+// Stream represents an RPC in the transport layer.
+type Stream struct {
+	id uint32
+	// nil for client side Stream.
+	st ServerTransport
+	// clientStatsCtx keeps the user context for stats handling.
+	// It's only valid on client side. Server side stats context is same as s.ctx.
+	// All client side stats collection should use the clientStatsCtx (instead of the stream context)
+	// so that all the generated stats for a particular RPC can be associated in the processing phase.
+	clientStatsCtx context.Context
+	// ctx is the associated context of the stream.
+	ctx context.Context
+	// cancel is always nil for client side Stream.
+	cancel context.CancelFunc
+	// done is closed when the final status arrives.
+	done chan struct{}
+	// goAway is closed when the server sent GoAways signal before this stream was initiated.
+	goAway chan struct{}
+	// method records the associated RPC method of the stream.
+	method       string
+	recvCompress string
+	sendCompress string
+	buf          *recvBuffer
+	dec          io.Reader
+	fc           *inFlow
+	recvQuota    uint32
+	// The accumulated inbound quota pending for window update.
+	updateQuota uint32
+	// The handler to control the window update procedure for both this
+	// particular stream and the associated transport.
+	windowHandler func(int)
+
+	sendQuotaPool *quotaPool
+	// Close headerChan to indicate the end of reception of header metadata.
+	headerChan chan struct{}
+	// header caches the received header metadata.
+	header metadata.MD
+	// The key-value map of trailer metadata.
+	trailer metadata.MD
+
+	mu sync.RWMutex // guard the following
+	// headerOK becomes true from the first header is about to send.
+	headerOk bool
+	state    streamState
+	// true iff headerChan is closed. Used to avoid closing headerChan
+	// multiple times.
+	headerDone bool
+	// the status received from the server.
+	statusCode codes.Code
+	statusDesc string
+	// rstStream indicates whether a RST_STREAM frame needs to be sent
+	// to the server to signify that this stream is closing.
+	rstStream bool
+	// rstError is the error that needs to be sent along with the RST_STREAM frame.
+	rstError http2.ErrCode
+}
+
+// RecvCompress returns the compression algorithm applied to the inbound
+// message. It is empty string if there is no compression applied.
+func (s *Stream) RecvCompress() string {
+	return s.recvCompress
+}
+
+// SetSendCompress sets the compression algorithm to the stream.
+func (s *Stream) SetSendCompress(str string) {
+	s.sendCompress = str
+}
+
+// Done returns a chanel which is closed when it receives the final status
+// from the server.
+func (s *Stream) Done() <-chan struct{} {
+	return s.done
+}
+
+// GoAway returns a channel which is closed when the server sent GoAways signal
+// before this stream was initiated.
+func (s *Stream) GoAway() <-chan struct{} {
+	return s.goAway
+}
+
+// Header acquires the key-value pairs of header metadata once it
+// is available. It blocks until i) the metadata is ready or ii) there is no
+// header metadata or iii) the stream is cancelled/expired.
+func (s *Stream) Header() (metadata.MD, error) {
+	select {
+	case <-s.ctx.Done():
+		return nil, ContextErr(s.ctx.Err())
+	case <-s.goAway:
+		return nil, ErrStreamDrain
+	case <-s.headerChan:
+		return s.header.Copy(), nil
+	}
+}
+
+// Trailer returns the cached trailer metedata. Note that if it is not called
+// after the entire stream is done, it could return an empty MD. Client
+// side only.
+func (s *Stream) Trailer() metadata.MD {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.trailer.Copy()
+}
+
+// ServerTransport returns the underlying ServerTransport for the stream.
+// The client side stream always returns nil.
+func (s *Stream) ServerTransport() ServerTransport {
+	return s.st
+}
+
+// Context returns the context of the stream.
+func (s *Stream) Context() context.Context {
+	return s.ctx
+}
+
+// Method returns the method for the stream.
+func (s *Stream) Method() string {
+	return s.method
+}
+
+// StatusCode returns statusCode received from the server.
+func (s *Stream) StatusCode() codes.Code {
+	return s.statusCode
+}
+
+// StatusDesc returns statusDesc received from the server.
+func (s *Stream) StatusDesc() string {
+	return s.statusDesc
+}
+
+// SetHeader sets the header metadata. This can be called multiple times.
+// Server side only.
+func (s *Stream) SetHeader(md metadata.MD) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if s.headerOk || s.state == streamDone {
+		return ErrIllegalHeaderWrite
+	}
+	if md.Len() == 0 {
+		return nil
+	}
+	s.header = metadata.Join(s.header, md)
+	return nil
+}
+
+// SetTrailer sets the trailer metadata which will be sent with the RPC status
+// by the server. This can be called multiple times. Server side only.
+func (s *Stream) SetTrailer(md metadata.MD) error {
+	if md.Len() == 0 {
+		return nil
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.trailer = metadata.Join(s.trailer, md)
+	return nil
+}
+
+func (s *Stream) write(m recvMsg) {
+	s.buf.put(&m)
+}
+
+// Read reads all the data available for this Stream from the transport and
+// passes them into the decoder, which converts them into a gRPC message stream.
+// The error is io.EOF when the stream is done or another non-nil error if
+// the stream broke.
+func (s *Stream) Read(p []byte) (n int, err error) {
+	n, err = s.dec.Read(p)
+	if err != nil {
+		return
+	}
+	s.windowHandler(n)
+	return
+}
+
+// The key to save transport.Stream in the context.
+type streamKey struct{}
+
+// newContextWithStream creates a new context from ctx and attaches stream
+// to it.
+func newContextWithStream(ctx context.Context, stream *Stream) context.Context {
+	return context.WithValue(ctx, streamKey{}, stream)
+}
+
+// StreamFromContext returns the stream saved in ctx.
+func StreamFromContext(ctx context.Context) (s *Stream, ok bool) {
+	s, ok = ctx.Value(streamKey{}).(*Stream)
+	return
+}
+
+// state of transport
+type transportState int
+
+const (
+	reachable transportState = iota
+	unreachable
+	closing
+	draining
+)
+
+// ServerConfig consists of all the configurations to establish a server transport.
+type ServerConfig struct {
+	MaxStreams      uint32
+	AuthInfo        credentials.AuthInfo
+	InTapHandle     tap.ServerInHandle
+	StatsHandler    stats.Handler
+	KeepaliveParams keepalive.ServerParameters
+}
+
+// NewServerTransport creates a ServerTransport with conn or non-nil error
+// if it fails.
+func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (ServerTransport, error) {
+	return newHTTP2Server(conn, config)
+}
+
+// ConnectOptions covers all relevant options for communicating with the server.
+type ConnectOptions struct {
+	// UserAgent is the application user agent.
+	UserAgent string
+	// Authority is the :authority pseudo-header to use. This field has no effect if
+	// TransportCredentials is set.
+	Authority string
+	// Dialer specifies how to dial a network address.
+	Dialer func(context.Context, string) (net.Conn, error)
+	// FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors.
+	FailOnNonTempDialError bool
+	// PerRPCCredentials stores the PerRPCCredentials required to issue RPCs.
+	PerRPCCredentials []credentials.PerRPCCredentials
+	// TransportCredentials stores the Authenticator required to setup a client connection.
+	TransportCredentials credentials.TransportCredentials
+	// KeepaliveParams stores the keepalive parameters.
+	KeepaliveParams keepalive.ClientParameters
+	// StatsHandler stores the handler for stats.
+	StatsHandler stats.Handler
+}
+
+// TargetInfo contains the information of the target such as network address and metadata.
+type TargetInfo struct {
+	Addr     string
+	Metadata interface{}
+}
+
+// NewClientTransport establishes the transport with the required ConnectOptions
+// and returns it to the caller.
+func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions) (ClientTransport, error) {
+	return newHTTP2Client(ctx, target, opts)
+}
+
+// Options provides additional hints and information for message
+// transmission.
+type Options struct {
+	// Last indicates whether this write is the last piece for
+	// this stream.
+	Last bool
+
+	// Delay is a hint to the transport implementation for whether
+	// the data could be buffered for a batching write. The
+	// Transport implementation may ignore the hint.
+	Delay bool
+}
+
+// CallHdr carries the information of a particular RPC.
+type CallHdr struct {
+	// Host specifies the peer's host.
+	Host string
+
+	// Method specifies the operation to perform.
+	Method string
+
+	// RecvCompress specifies the compression algorithm applied on
+	// inbound messages.
+	RecvCompress string
+
+	// SendCompress specifies the compression algorithm applied on
+	// outbound message.
+	SendCompress string
+
+	// Flush indicates whether a new stream command should be sent
+	// to the peer without waiting for the first data. This is
+	// only a hint. The transport may modify the flush decision
+	// for performance purposes.
+	Flush bool
+}
+
+// ClientTransport is the common interface for all gRPC client-side transport
+// implementations.
+type ClientTransport interface {
+	// Close tears down this transport. Once it returns, the transport
+	// should not be accessed any more. The caller must make sure this
+	// is called only once.
+	Close() error
+
+	// GracefulClose starts to tear down the transport. It stops accepting
+	// new RPCs and wait the completion of the pending RPCs.
+	GracefulClose() error
+
+	// Write sends the data for the given stream. A nil stream indicates
+	// the write is to be performed on the transport as a whole.
+	Write(s *Stream, data []byte, opts *Options) error
+
+	// NewStream creates a Stream for an RPC.
+	NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error)
+
+	// CloseStream clears the footprint of a stream when the stream is
+	// not needed any more. The err indicates the error incurred when
+	// CloseStream is called. Must be called when a stream is finished
+	// unless the associated transport is closing.
+	CloseStream(stream *Stream, err error)
+
+	// Error returns a channel that is closed when some I/O error
+	// happens. Typically the caller should have a goroutine to monitor
+	// this in order to take action (e.g., close the current transport
+	// and create a new one) in error case. It should not return nil
+	// once the transport is initiated.
+	Error() <-chan struct{}
+
+	// GoAway returns a channel that is closed when ClientTranspor
+	// receives the draining signal from the server (e.g., GOAWAY frame in
+	// HTTP/2).
+	GoAway() <-chan struct{}
+}
+
+// ServerTransport is the common interface for all gRPC server-side transport
+// implementations.
+//
+// Methods may be called concurrently from multiple goroutines, but
+// Write methods for a given Stream will be called serially.
+type ServerTransport interface {
+	// HandleStreams receives incoming streams using the given handler.
+	HandleStreams(func(*Stream), func(context.Context, string) context.Context)
+
+	// WriteHeader sends the header metadata for the given stream.
+	// WriteHeader may not be called on all streams.
+	WriteHeader(s *Stream, md metadata.MD) error
+
+	// Write sends the data for the given stream.
+	// Write may not be called on all streams.
+	Write(s *Stream, data []byte, opts *Options) error
+
+	// WriteStatus sends the status of a stream to the client.
+	// WriteStatus is the final call made on a stream and always
+	// occurs.
+	WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error
+
+	// Close tears down the transport. Once it is called, the transport
+	// should not be accessed any more. All the pending streams and their
+	// handlers will be terminated asynchronously.
+	Close() error
+
+	// RemoteAddr returns the remote network address.
+	RemoteAddr() net.Addr
+
+	// Drain notifies the client this ServerTransport stops accepting new RPCs.
+	Drain()
+}
+
+// streamErrorf creates an StreamError with the specified error code and description.
+func streamErrorf(c codes.Code, format string, a ...interface{}) StreamError {
+	return StreamError{
+		Code: c,
+		Desc: fmt.Sprintf(format, a...),
+	}
+}
+
+// connectionErrorf creates an ConnectionError with the specified error description.
+func connectionErrorf(temp bool, e error, format string, a ...interface{}) ConnectionError {
+	return ConnectionError{
+		Desc: fmt.Sprintf(format, a...),
+		temp: temp,
+		err:  e,
+	}
+}
+
+// ConnectionError is an error that results in the termination of the
+// entire connection and the retry of all the active streams.
+type ConnectionError struct {
+	Desc string
+	temp bool
+	err  error
+}
+
+func (e ConnectionError) Error() string {
+	return fmt.Sprintf("connection error: desc = %q", e.Desc)
+}
+
+// Temporary indicates if this connection error is temporary or fatal.
+func (e ConnectionError) Temporary() bool {
+	return e.temp
+}
+
+// Origin returns the original error of this connection error.
+func (e ConnectionError) Origin() error {
+	// Never return nil error here.
+	// If the original error is nil, return itself.
+	if e.err == nil {
+		return e
+	}
+	return e.err
+}
+
+var (
+	// ErrConnClosing indicates that the transport is closing.
+	ErrConnClosing = connectionErrorf(true, nil, "transport is closing")
+	// ErrStreamDrain indicates that the stream is rejected by the server because
+	// the server stops accepting new RPCs.
+	ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs")
+)
+
+// StreamError is an error that only affects one stream within a connection.
+type StreamError struct {
+	Code codes.Code
+	Desc string
+}
+
+func (e StreamError) Error() string {
+	return fmt.Sprintf("stream error: code = %s desc = %q", e.Code, e.Desc)
+}
+
+// ContextErr converts the error from context package into a StreamError.
+func ContextErr(err error) StreamError {
+	switch err {
+	case context.DeadlineExceeded:
+		return streamErrorf(codes.DeadlineExceeded, "%v", err)
+	case context.Canceled:
+		return streamErrorf(codes.Canceled, "%v", err)
+	}
+	panic(fmt.Sprintf("Unexpected error from context packet: %v", err))
+}
+
+// wait blocks until it can receive from ctx.Done, closing, or proceed.
+// If it receives from ctx.Done, it returns 0, the StreamError for ctx.Err.
+// If it receives from done, it returns 0, io.EOF if ctx is not done; otherwise
+// it return the StreamError for ctx.Err.
+// If it receives from goAway, it returns 0, ErrStreamDrain.
+// If it receives from closing, it returns 0, ErrConnClosing.
+// If it receives from proceed, it returns the received integer, nil.
+func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-chan int) (int, error) {
+	select {
+	case <-ctx.Done():
+		return 0, ContextErr(ctx.Err())
+	case <-done:
+		// User cancellation has precedence.
+		select {
+		case <-ctx.Done():
+			return 0, ContextErr(ctx.Err())
+		default:
+		}
+		return 0, io.EOF
+	case <-goAway:
+		return 0, ErrStreamDrain
+	case <-closing:
+		return 0, ErrConnClosing
+	case i := <-proceed:
+		return i, nil
+	}
+}
diff --git a/vendor/google.golang.org/grpc/transport/transport_test.go b/vendor/google.golang.org/grpc/transport/transport_test.go
new file mode 100644
index 00000000000..62038784df2
--- /dev/null
+++ b/vendor/google.golang.org/grpc/transport/transport_test.go
@@ -0,0 +1,1103 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"net"
+	"strconv"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2"
+	"golang.org/x/net/http2/hpack"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/keepalive"
+)
+
+type server struct {
+	lis        net.Listener
+	port       string
+	startedErr chan error // error (or nil) with server start value
+	mu         sync.Mutex
+	conns      map[ServerTransport]bool
+}
+
+var (
+	expectedRequest            = []byte("ping")
+	expectedResponse           = []byte("pong")
+	expectedRequestLarge       = make([]byte, initialWindowSize*2)
+	expectedResponseLarge      = make([]byte, initialWindowSize*2)
+	expectedInvalidHeaderField = "invalid/content-type"
+)
+
+type testStreamHandler struct {
+	t *http2Server
+}
+
+type hType int
+
+const (
+	normal hType = iota
+	suspended
+	misbehaved
+	encodingRequiredStatus
+	invalidHeaderField
+)
+
+func (h *testStreamHandler) handleStream(t *testing.T, s *Stream) {
+	req := expectedRequest
+	resp := expectedResponse
+	if s.Method() == "foo.Large" {
+		req = expectedRequestLarge
+		resp = expectedResponseLarge
+	}
+	p := make([]byte, len(req))
+	_, err := io.ReadFull(s, p)
+	if err != nil {
+		return
+	}
+	if !bytes.Equal(p, req) {
+		t.Fatalf("handleStream got %v, want %v", p, req)
+	}
+	// send a response back to the client.
+	h.t.Write(s, resp, &Options{})
+	// send the trailer to end the stream.
+	h.t.WriteStatus(s, codes.OK, "")
+}
+
+// handleStreamSuspension blocks until s.ctx is canceled.
+func (h *testStreamHandler) handleStreamSuspension(s *Stream) {
+	go func() {
+		<-s.ctx.Done()
+	}()
+}
+
+func (h *testStreamHandler) handleStreamMisbehave(t *testing.T, s *Stream) {
+	conn, ok := s.ServerTransport().(*http2Server)
+	if !ok {
+		t.Fatalf("Failed to convert %v to *http2Server", s.ServerTransport())
+	}
+	var sent int
+	p := make([]byte, http2MaxFrameLen)
+	for sent < initialWindowSize {
+		<-conn.writableChan
+		n := initialWindowSize - sent
+		// The last message may be smaller than http2MaxFrameLen
+		if n <= http2MaxFrameLen {
+			if s.Method() == "foo.Connection" {
+				// Violate connection level flow control window of client but do not
+				// violate any stream level windows.
+				p = make([]byte, n)
+			} else {
+				// Violate stream level flow control window of client.
+				p = make([]byte, n+1)
+			}
+		}
+		if err := conn.framer.writeData(true, s.id, false, p); err != nil {
+			conn.writableChan <- 0
+			break
+		}
+		conn.writableChan <- 0
+		sent += len(p)
+	}
+}
+
+func (h *testStreamHandler) handleStreamEncodingRequiredStatus(t *testing.T, s *Stream) {
+	// raw newline is not accepted by http2 framer so it must be encoded.
+	h.t.WriteStatus(s, encodingTestStatusCode, encodingTestStatusDesc)
+}
+
+func (h *testStreamHandler) handleStreamInvalidHeaderField(t *testing.T, s *Stream) {
+	<-h.t.writableChan
+	h.t.hBuf.Reset()
+	h.t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: expectedInvalidHeaderField})
+	if err := h.t.writeHeaders(s, h.t.hBuf, false); err != nil {
+		t.Fatalf("Failed to write headers: %v", err)
+	}
+	h.t.writableChan <- 0
+}
+
+// start starts server. Other goroutines should block on s.readyChan for further operations.
+func (s *server) start(t *testing.T, port int, serverConfig *ServerConfig, ht hType) {
+	var err error
+	if port == 0 {
+		s.lis, err = net.Listen("tcp", "localhost:0")
+	} else {
+		s.lis, err = net.Listen("tcp", "localhost:"+strconv.Itoa(port))
+	}
+	if err != nil {
+		s.startedErr <- fmt.Errorf("failed to listen: %v", err)
+		return
+	}
+	_, p, err := net.SplitHostPort(s.lis.Addr().String())
+	if err != nil {
+		s.startedErr <- fmt.Errorf("failed to parse listener address: %v", err)
+		return
+	}
+	s.port = p
+	s.conns = make(map[ServerTransport]bool)
+	s.startedErr <- nil
+	for {
+		conn, err := s.lis.Accept()
+		if err != nil {
+			return
+		}
+		transport, err := NewServerTransport("http2", conn, serverConfig)
+		if err != nil {
+			return
+		}
+		s.mu.Lock()
+		if s.conns == nil {
+			s.mu.Unlock()
+			transport.Close()
+			return
+		}
+		s.conns[transport] = true
+		s.mu.Unlock()
+		h := &testStreamHandler{transport.(*http2Server)}
+		switch ht {
+		case suspended:
+			go transport.HandleStreams(h.handleStreamSuspension,
+				func(ctx context.Context, method string) context.Context {
+					return ctx
+				})
+		case misbehaved:
+			go transport.HandleStreams(func(s *Stream) {
+				go h.handleStreamMisbehave(t, s)
+			}, func(ctx context.Context, method string) context.Context {
+				return ctx
+			})
+		case encodingRequiredStatus:
+			go transport.HandleStreams(func(s *Stream) {
+				go h.handleStreamEncodingRequiredStatus(t, s)
+			}, func(ctx context.Context, method string) context.Context {
+				return ctx
+			})
+		case invalidHeaderField:
+			go transport.HandleStreams(func(s *Stream) {
+				go h.handleStreamInvalidHeaderField(t, s)
+			}, func(ctx context.Context, method string) context.Context {
+				return ctx
+			})
+		default:
+			go transport.HandleStreams(func(s *Stream) {
+				go h.handleStream(t, s)
+			}, func(ctx context.Context, method string) context.Context {
+				return ctx
+			})
+		}
+	}
+}
+
+func (s *server) wait(t *testing.T, timeout time.Duration) {
+	select {
+	case err := <-s.startedErr:
+		if err != nil {
+			t.Fatal(err)
+		}
+	case <-time.After(timeout):
+		t.Fatalf("Timed out after %v waiting for server to be ready", timeout)
+	}
+}
+
+func (s *server) stop() {
+	s.lis.Close()
+	s.mu.Lock()
+	for c := range s.conns {
+		c.Close()
+	}
+	s.conns = nil
+	s.mu.Unlock()
+}
+
+func setUp(t *testing.T, port int, maxStreams uint32, ht hType) (*server, ClientTransport) {
+	return setUpWithOptions(t, port, &ServerConfig{MaxStreams: maxStreams}, ht, ConnectOptions{})
+}
+
+func setUpWithOptions(t *testing.T, port int, serverConfig *ServerConfig, ht hType, copts ConnectOptions) (*server, ClientTransport) {
+	server := &server{startedErr: make(chan error, 1)}
+	go server.start(t, port, serverConfig, ht)
+	server.wait(t, 2*time.Second)
+	addr := "localhost:" + server.port
+	var (
+		ct      ClientTransport
+		connErr error
+	)
+	target := TargetInfo{
+		Addr: addr,
+	}
+	ct, connErr = NewClientTransport(context.Background(), target, copts)
+	if connErr != nil {
+		t.Fatalf("failed to create transport: %v", connErr)
+	}
+	return server, ct
+}
+
+func setUpWithNoPingServer(t *testing.T, copts ConnectOptions, done chan net.Conn) ClientTransport {
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		t.Fatalf("Failed to listen: %v", err)
+	}
+	// Launch a non responsive server.
+	go func() {
+		defer lis.Close()
+		conn, err := lis.Accept()
+		if err != nil {
+			t.Errorf("Error at server-side while accepting: %v", err)
+			close(done)
+			return
+		}
+		done <- conn
+	}()
+	tr, err := NewClientTransport(context.Background(), TargetInfo{Addr: lis.Addr().String()}, copts)
+	if err != nil {
+		// Server clean-up.
+		lis.Close()
+		if conn, ok := <-done; ok {
+			conn.Close()
+		}
+		t.Fatalf("Failed to dial: %v", err)
+	}
+	return tr
+}
+
+// TestMaxConnectionIdle tests that a server will send GoAway to a idle client.
+// An idle client is one who doesn't make any RPC calls for a duration of
+// MaxConnectionIdle time.
+func TestMaxConnectionIdle(t *testing.T) {
+	serverConfig := &ServerConfig{
+		KeepaliveParams: keepalive.ServerParameters{
+			MaxConnectionIdle: 2 * time.Second,
+		},
+	}
+	server, client := setUpWithOptions(t, 0, serverConfig, suspended, ConnectOptions{})
+	defer server.stop()
+	defer client.Close()
+	stream, err := client.NewStream(context.Background(), &CallHdr{Flush: true})
+	if err != nil {
+		t.Fatalf("Client failed to create RPC request: %v", err)
+	}
+	stream.mu.Lock()
+	stream.rstStream = true
+	stream.mu.Unlock()
+	client.CloseStream(stream, nil)
+	// wait for server to see that closed stream and max-age logic to send goaway after no new RPCs are mode
+	timeout := time.NewTimer(time.Second * 4)
+	select {
+	case <-client.GoAway():
+	case <-timeout.C:
+		t.Fatalf("Test timed out, expected a GoAway from the server.")
+	}
+}
+
+// TestMaxConenctionIdleNegative tests that a server will not send GoAway to a non-idle(busy) client.
+func TestMaxConnectionIdleNegative(t *testing.T) {
+	serverConfig := &ServerConfig{
+		KeepaliveParams: keepalive.ServerParameters{
+			MaxConnectionIdle: 2 * time.Second,
+		},
+	}
+	server, client := setUpWithOptions(t, 0, serverConfig, suspended, ConnectOptions{})
+	defer server.stop()
+	defer client.Close()
+	_, err := client.NewStream(context.Background(), &CallHdr{Flush: true})
+	if err != nil {
+		t.Fatalf("Client failed to create RPC request: %v", err)
+	}
+	timeout := time.NewTimer(time.Second * 4)
+	select {
+	case <-client.GoAway():
+		t.Fatalf("A non-idle client received a GoAway.")
+	case <-timeout.C:
+	}
+
+}
+
+// TestMaxConnectionAge tests that a server will send GoAway after a duration of MaxConnectionAge.
+func TestMaxConnectionAge(t *testing.T) {
+	serverConfig := &ServerConfig{
+		KeepaliveParams: keepalive.ServerParameters{
+			MaxConnectionAge: 2 * time.Second,
+		},
+	}
+	server, client := setUpWithOptions(t, 0, serverConfig, suspended, ConnectOptions{})
+	defer server.stop()
+	defer client.Close()
+	_, err := client.NewStream(context.Background(), &CallHdr{})
+	if err != nil {
+		t.Fatalf("Client failed to create stream: %v", err)
+	}
+	// Wait for max-age logic to send GoAway.
+	timeout := time.NewTimer(4 * time.Second)
+	select {
+	case <-client.GoAway():
+	case <-timeout.C:
+		t.Fatalf("Test timer out, expected a GoAway from the server.")
+	}
+}
+
+// TestKeepaliveServer tests that a server closes conneciton with a client that doesn't respond to keepalive pings.
+func TestKeepaliveServer(t *testing.T) {
+	serverConfig := &ServerConfig{
+		KeepaliveParams: keepalive.ServerParameters{
+			Time:    2 * time.Second,
+			Timeout: 1 * time.Second,
+		},
+	}
+	server, c := setUpWithOptions(t, 0, serverConfig, suspended, ConnectOptions{})
+	defer server.stop()
+	defer c.Close()
+	client, err := net.Dial("tcp", server.lis.Addr().String())
+	if err != nil {
+		t.Fatalf("Failed to dial: %v", err)
+	}
+	defer client.Close()
+	// Set read deadline on client conn so that it doesn't block forever in errorsome cases.
+	client.SetReadDeadline(time.Now().Add(10 * time.Second))
+	// Wait for keepalive logic to close the connection.
+	time.Sleep(4 * time.Second)
+	b := make([]byte, 24)
+	for {
+		_, err = client.Read(b)
+		if err == nil {
+			continue
+		}
+		if err != io.EOF {
+			t.Fatalf("client.Read(_) = _,%v, want io.EOF", err)
+		}
+		break
+	}
+}
+
+// TestKeepaliveServerNegative tests that a server doesn't close connection with a client that responds to keepalive pings.
+func TestKeepaliveServerNegative(t *testing.T) {
+	serverConfig := &ServerConfig{
+		KeepaliveParams: keepalive.ServerParameters{
+			Time:    2 * time.Second,
+			Timeout: 1 * time.Second,
+		},
+	}
+	server, client := setUpWithOptions(t, 0, serverConfig, suspended, ConnectOptions{})
+	defer server.stop()
+	defer client.Close()
+	// Give keepalive logic some time by sleeping.
+	time.Sleep(4 * time.Second)
+	// Assert that client is still active.
+	clientTr := client.(*http2Client)
+	clientTr.mu.Lock()
+	defer clientTr.mu.Unlock()
+	if clientTr.state != reachable {
+		t.Fatalf("Test failed: Expected server-client connection to be healthy.")
+	}
+}
+
+func TestKeepaliveClientClosesIdleTransport(t *testing.T) {
+	done := make(chan net.Conn, 1)
+	tr := setUpWithNoPingServer(t, ConnectOptions{KeepaliveParams: keepalive.ClientParameters{
+		Time:                2 * time.Second, // Keepalive time = 2 sec.
+		Timeout:             1 * time.Second, // Keepalive timeout = 1 sec.
+		PermitWithoutStream: true,            // Run keepalive even with no RPCs.
+	}}, done)
+	defer tr.Close()
+	conn, ok := <-done
+	if !ok {
+		t.Fatalf("Server didn't return connection object")
+	}
+	defer conn.Close()
+	// Sleep for keepalive to close the connection.
+	time.Sleep(4 * time.Second)
+	// Assert that the connection was closed.
+	ct := tr.(*http2Client)
+	ct.mu.Lock()
+	defer ct.mu.Unlock()
+	if ct.state == reachable {
+		t.Fatalf("Test Failed: Expected client transport to have closed.")
+	}
+}
+
+func TestKeepaliveClientStaysHealthyOnIdleTransport(t *testing.T) {
+	done := make(chan net.Conn, 1)
+	tr := setUpWithNoPingServer(t, ConnectOptions{KeepaliveParams: keepalive.ClientParameters{
+		Time:    2 * time.Second, // Keepalive time = 2 sec.
+		Timeout: 1 * time.Second, // Keepalive timeout = 1 sec.
+	}}, done)
+	defer tr.Close()
+	conn, ok := <-done
+	if !ok {
+		t.Fatalf("server didn't reutrn connection object")
+	}
+	defer conn.Close()
+	// Give keepalive some time.
+	time.Sleep(4 * time.Second)
+	// Assert that connections is still healthy.
+	ct := tr.(*http2Client)
+	ct.mu.Lock()
+	defer ct.mu.Unlock()
+	if ct.state != reachable {
+		t.Fatalf("Test failed: Expected client transport to be healthy.")
+	}
+}
+
+func TestKeepaliveClientClosesWithActiveStreams(t *testing.T) {
+	done := make(chan net.Conn, 1)
+	tr := setUpWithNoPingServer(t, ConnectOptions{KeepaliveParams: keepalive.ClientParameters{
+		Time:    2 * time.Second, // Keepalive time = 2 sec.
+		Timeout: 1 * time.Second, // Keepalive timeout = 1 sec.
+	}}, done)
+	defer tr.Close()
+	conn, ok := <-done
+	if !ok {
+		t.Fatalf("Server didn't return connection object")
+	}
+	defer conn.Close()
+	// Create a stream.
+	_, err := tr.NewStream(context.Background(), &CallHdr{Flush: true})
+	if err != nil {
+		t.Fatalf("Failed to create a new stream: %v", err)
+	}
+	// Give keepalive some time.
+	time.Sleep(4 * time.Second)
+	// Assert that transport was closed.
+	ct := tr.(*http2Client)
+	ct.mu.Lock()
+	defer ct.mu.Unlock()
+	if ct.state == reachable {
+		t.Fatalf("Test failed: Expected client transport to have closed.")
+	}
+}
+
+func TestKeepaliveClientStaysHealthyWithResponsiveServer(t *testing.T) {
+	s, tr := setUpWithOptions(t, 0, &ServerConfig{MaxStreams: math.MaxUint32}, normal, ConnectOptions{KeepaliveParams: keepalive.ClientParameters{
+		Time:                2 * time.Second, // Keepalive time = 2 sec.
+		Timeout:             1 * time.Second, // Keepalive timeout = 1 sec.
+		PermitWithoutStream: true,            // Run keepalive even with no RPCs.
+	}})
+	defer s.stop()
+	defer tr.Close()
+	// Give keep alive some time.
+	time.Sleep(4 * time.Second)
+	// Assert that transport is healthy.
+	ct := tr.(*http2Client)
+	ct.mu.Lock()
+	defer ct.mu.Unlock()
+	if ct.state != reachable {
+		t.Fatalf("Test failed: Expected client transport to be healthy.")
+	}
+}
+
+func TestClientSendAndReceive(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, normal)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Small",
+	}
+	s1, err1 := ct.NewStream(context.Background(), callHdr)
+	if err1 != nil {
+		t.Fatalf("failed to open stream: %v", err1)
+	}
+	if s1.id != 1 {
+		t.Fatalf("wrong stream id: %d", s1.id)
+	}
+	s2, err2 := ct.NewStream(context.Background(), callHdr)
+	if err2 != nil {
+		t.Fatalf("failed to open stream: %v", err2)
+	}
+	if s2.id != 3 {
+		t.Fatalf("wrong stream id: %d", s2.id)
+	}
+	opts := Options{
+		Last:  true,
+		Delay: false,
+	}
+	if err := ct.Write(s1, expectedRequest, &opts); err != nil && err != io.EOF {
+		t.Fatalf("failed to send data: %v", err)
+	}
+	p := make([]byte, len(expectedResponse))
+	_, recvErr := io.ReadFull(s1, p)
+	if recvErr != nil || !bytes.Equal(p, expectedResponse) {
+		t.Fatalf("Error: %v, want <nil>; Result: %v, want %v", recvErr, p, expectedResponse)
+	}
+	_, recvErr = io.ReadFull(s1, p)
+	if recvErr != io.EOF {
+		t.Fatalf("Error: %v; want <EOF>", recvErr)
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestClientErrorNotify(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, normal)
+	go server.stop()
+	// ct.reader should detect the error and activate ct.Error().
+	<-ct.Error()
+	ct.Close()
+}
+
+func performOneRPC(ct ClientTransport) {
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Small",
+	}
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		return
+	}
+	opts := Options{
+		Last:  true,
+		Delay: false,
+	}
+	if err := ct.Write(s, expectedRequest, &opts); err == nil || err == io.EOF {
+		time.Sleep(5 * time.Millisecond)
+		// The following s.Recv()'s could error out because the
+		// underlying transport is gone.
+		//
+		// Read response
+		p := make([]byte, len(expectedResponse))
+		io.ReadFull(s, p)
+		// Read io.EOF
+		io.ReadFull(s, p)
+	}
+}
+
+func TestClientMix(t *testing.T) {
+	s, ct := setUp(t, 0, math.MaxUint32, normal)
+	go func(s *server) {
+		time.Sleep(5 * time.Second)
+		s.stop()
+	}(s)
+	go func(ct ClientTransport) {
+		<-ct.Error()
+		ct.Close()
+	}(ct)
+	for i := 0; i < 1000; i++ {
+		time.Sleep(10 * time.Millisecond)
+		go performOneRPC(ct)
+	}
+}
+
+func TestLargeMessage(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, normal)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Large",
+	}
+	var wg sync.WaitGroup
+	for i := 0; i < 2; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			s, err := ct.NewStream(context.Background(), callHdr)
+			if err != nil {
+				t.Errorf("%v.NewStream(_, _) = _, %v, want _, <nil>", ct, err)
+			}
+			if err := ct.Write(s, expectedRequestLarge, &Options{Last: true, Delay: false}); err != nil && err != io.EOF {
+				t.Errorf("%v.Write(_, _, _) = %v, want  <nil>", ct, err)
+			}
+			p := make([]byte, len(expectedResponseLarge))
+			if _, err := io.ReadFull(s, p); err != nil || !bytes.Equal(p, expectedResponseLarge) {
+				t.Errorf("io.ReadFull(_, %v) = _, %v, want %v, <nil>", err, p, expectedResponse)
+			}
+			if _, err = io.ReadFull(s, p); err != io.EOF {
+				t.Errorf("Failed to complete the stream %v; want <EOF>", err)
+			}
+		}()
+	}
+	wg.Wait()
+	ct.Close()
+	server.stop()
+}
+
+func TestGracefulClose(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, normal)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Small",
+	}
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		t.Fatalf("%v.NewStream(_, _) = _, %v, want _, <nil>", ct, err)
+	}
+	if err = ct.GracefulClose(); err != nil {
+		t.Fatalf("%v.GracefulClose() = %v, want <nil>", ct, err)
+	}
+	var wg sync.WaitGroup
+	// Expect the failure for all the follow-up streams because ct has been closed gracefully.
+	for i := 0; i < 100; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			if _, err := ct.NewStream(context.Background(), callHdr); err != ErrStreamDrain {
+				t.Errorf("%v.NewStream(_, _) = _, %v, want _, %v", ct, err, ErrStreamDrain)
+			}
+		}()
+	}
+	opts := Options{
+		Last:  true,
+		Delay: false,
+	}
+	// The stream which was created before graceful close can still proceed.
+	if err := ct.Write(s, expectedRequest, &opts); err != nil && err != io.EOF {
+		t.Fatalf("%v.Write(_, _, _) = %v, want  <nil>", ct, err)
+	}
+	p := make([]byte, len(expectedResponse))
+	if _, err := io.ReadFull(s, p); err != nil || !bytes.Equal(p, expectedResponse) {
+		t.Fatalf("io.ReadFull(_, %v) = _, %v, want %v, <nil>", err, p, expectedResponse)
+	}
+	if _, err = io.ReadFull(s, p); err != io.EOF {
+		t.Fatalf("Failed to complete the stream %v; want <EOF>", err)
+	}
+	wg.Wait()
+	ct.Close()
+	server.stop()
+}
+
+func TestLargeMessageSuspension(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, suspended)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Large",
+	}
+	// Set a long enough timeout for writing a large message out.
+	ctx, _ := context.WithTimeout(context.Background(), time.Second)
+	s, err := ct.NewStream(ctx, callHdr)
+	if err != nil {
+		t.Fatalf("failed to open stream: %v", err)
+	}
+	// Write should not be done successfully due to flow control.
+	err = ct.Write(s, expectedRequestLarge, &Options{Last: true, Delay: false})
+	expectedErr := streamErrorf(codes.DeadlineExceeded, "%v", context.DeadlineExceeded)
+	if err != expectedErr {
+		t.Fatalf("Write got %v, want %v", err, expectedErr)
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestMaxStreams(t *testing.T) {
+	server, ct := setUp(t, 0, 1, suspended)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Large",
+	}
+	// Have a pending stream which takes all streams quota.
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		t.Fatalf("Failed to open stream: %v", err)
+	}
+	cc, ok := ct.(*http2Client)
+	if !ok {
+		t.Fatalf("Failed to convert %v to *http2Client", ct)
+	}
+	done := make(chan struct{})
+	ch := make(chan int)
+	ready := make(chan struct{})
+	go func() {
+		for {
+			select {
+			case <-time.After(5 * time.Millisecond):
+				select {
+				case ch <- 0:
+				case <-ready:
+					return
+				}
+			case <-time.After(5 * time.Second):
+				close(done)
+				return
+			case <-ready:
+				return
+			}
+		}
+	}()
+	for {
+		select {
+		case <-ch:
+		case <-done:
+			t.Fatalf("Client has not received the max stream setting in 5 seconds.")
+		}
+		cc.mu.Lock()
+		// cc.maxStreams should be equal to 1 after having received settings frame from
+		// server.
+		if cc.maxStreams == 1 {
+			cc.mu.Unlock()
+			select {
+			case <-cc.streamsQuota.acquire():
+				t.Fatalf("streamsQuota.acquire() becomes readable mistakenly.")
+			default:
+				cc.streamsQuota.mu.Lock()
+				quota := cc.streamsQuota.quota
+				cc.streamsQuota.mu.Unlock()
+				if quota != 0 {
+					t.Fatalf("streamsQuota.quota got non-zero quota mistakenly.")
+				}
+			}
+			break
+		}
+		cc.mu.Unlock()
+	}
+	close(ready)
+	// Close the pending stream so that the streams quota becomes available for the next new stream.
+	ct.CloseStream(s, nil)
+	select {
+	case i := <-cc.streamsQuota.acquire():
+		if i != 1 {
+			t.Fatalf("streamsQuota.acquire() got %d quota, want 1.", i)
+		}
+		cc.streamsQuota.add(i)
+	default:
+		t.Fatalf("streamsQuota.acquire() is not readable.")
+	}
+	if _, err := ct.NewStream(context.Background(), callHdr); err != nil {
+		t.Fatalf("Failed to open stream: %v", err)
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestServerContextCanceledOnClosedConnection(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, suspended)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo",
+	}
+	var sc *http2Server
+	// Wait until the server transport is setup.
+	for {
+		server.mu.Lock()
+		if len(server.conns) == 0 {
+			server.mu.Unlock()
+			time.Sleep(time.Millisecond)
+			continue
+		}
+		for k := range server.conns {
+			var ok bool
+			sc, ok = k.(*http2Server)
+			if !ok {
+				t.Fatalf("Failed to convert %v to *http2Server", k)
+			}
+		}
+		server.mu.Unlock()
+		break
+	}
+	cc, ok := ct.(*http2Client)
+	if !ok {
+		t.Fatalf("Failed to convert %v to *http2Client", ct)
+	}
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		t.Fatalf("Failed to open stream: %v", err)
+	}
+	// Make sure the headers frame is flushed out.
+	<-cc.writableChan
+	if err = cc.framer.writeData(true, s.id, false, make([]byte, http2MaxFrameLen)); err != nil {
+		t.Fatalf("Failed to write data: %v", err)
+	}
+	cc.writableChan <- 0
+	// Loop until the server side stream is created.
+	var ss *Stream
+	for {
+		time.Sleep(time.Second)
+		sc.mu.Lock()
+		if len(sc.activeStreams) == 0 {
+			sc.mu.Unlock()
+			continue
+		}
+		ss = sc.activeStreams[s.id]
+		sc.mu.Unlock()
+		break
+	}
+	cc.Close()
+	select {
+	case <-ss.Context().Done():
+		if ss.Context().Err() != context.Canceled {
+			t.Fatalf("ss.Context().Err() got %v, want %v", ss.Context().Err(), context.Canceled)
+		}
+	case <-time.After(5 * time.Second):
+		t.Fatalf("Failed to cancel the context of the sever side stream.")
+	}
+	server.stop()
+}
+
+func TestServerWithMisbehavedClient(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, suspended)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo",
+	}
+	var sc *http2Server
+	// Wait until the server transport is setup.
+	for {
+		server.mu.Lock()
+		if len(server.conns) == 0 {
+			server.mu.Unlock()
+			time.Sleep(time.Millisecond)
+			continue
+		}
+		for k := range server.conns {
+			var ok bool
+			sc, ok = k.(*http2Server)
+			if !ok {
+				t.Fatalf("Failed to convert %v to *http2Server", k)
+			}
+		}
+		server.mu.Unlock()
+		break
+	}
+	cc, ok := ct.(*http2Client)
+	if !ok {
+		t.Fatalf("Failed to convert %v to *http2Client", ct)
+	}
+	// Test server behavior for violation of stream flow control window size restriction.
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		t.Fatalf("Failed to open stream: %v", err)
+	}
+	var sent int
+	// Drain the stream flow control window
+	<-cc.writableChan
+	if err = cc.framer.writeData(true, s.id, false, make([]byte, http2MaxFrameLen)); err != nil {
+		t.Fatalf("Failed to write data: %v", err)
+	}
+	cc.writableChan <- 0
+	sent += http2MaxFrameLen
+	// Wait until the server creates the corresponding stream and receive some data.
+	var ss *Stream
+	for {
+		time.Sleep(time.Millisecond)
+		sc.mu.Lock()
+		if len(sc.activeStreams) == 0 {
+			sc.mu.Unlock()
+			continue
+		}
+		ss = sc.activeStreams[s.id]
+		sc.mu.Unlock()
+		ss.fc.mu.Lock()
+		if ss.fc.pendingData > 0 {
+			ss.fc.mu.Unlock()
+			break
+		}
+		ss.fc.mu.Unlock()
+	}
+	if ss.fc.pendingData != http2MaxFrameLen || ss.fc.pendingUpdate != 0 || sc.fc.pendingData != http2MaxFrameLen || sc.fc.pendingUpdate != 0 {
+		t.Fatalf("Server mistakenly updates inbound flow control params: got %d, %d, %d, %d; want %d, %d, %d, %d", ss.fc.pendingData, ss.fc.pendingUpdate, sc.fc.pendingData, sc.fc.pendingUpdate, http2MaxFrameLen, 0, http2MaxFrameLen, 0)
+	}
+	// Keep sending until the server inbound window is drained for that stream.
+	for sent <= initialWindowSize {
+		<-cc.writableChan
+		if err = cc.framer.writeData(true, s.id, false, make([]byte, 1)); err != nil {
+			t.Fatalf("Failed to write data: %v", err)
+		}
+		cc.writableChan <- 0
+		sent++
+	}
+	// Server sent a resetStream for s already.
+	code := http2ErrConvTab[http2.ErrCodeFlowControl]
+	if _, err := io.ReadFull(s, make([]byte, 1)); err != io.EOF || s.statusCode != code {
+		t.Fatalf("%v got err %v with statusCode %d, want err <EOF> with statusCode %d", s, err, s.statusCode, code)
+	}
+
+	if ss.fc.pendingData != 0 || ss.fc.pendingUpdate != 0 || sc.fc.pendingData != 0 || sc.fc.pendingUpdate <= initialWindowSize {
+		t.Fatalf("Server mistakenly resets inbound flow control params: got %d, %d, %d, %d; want 0, 0, 0, >%d", ss.fc.pendingData, ss.fc.pendingUpdate, sc.fc.pendingData, sc.fc.pendingUpdate, initialWindowSize)
+	}
+	ct.CloseStream(s, nil)
+	// Test server behavior for violation of connection flow control window size restriction.
+	//
+	// Keep creating new streams until the connection window is drained on the server and
+	// the server tears down the connection.
+	for {
+		s, err := ct.NewStream(context.Background(), callHdr)
+		if err != nil {
+			// The server tears down the connection.
+			break
+		}
+		<-cc.writableChan
+		cc.framer.writeData(true, s.id, true, make([]byte, http2MaxFrameLen))
+		cc.writableChan <- 0
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestClientWithMisbehavedServer(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, misbehaved)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo.Stream",
+	}
+	conn, ok := ct.(*http2Client)
+	if !ok {
+		t.Fatalf("Failed to convert %v to *http2Client", ct)
+	}
+	// Test the logic for the violation of stream flow control window size restriction.
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		t.Fatalf("Failed to open stream: %v", err)
+	}
+	d := make([]byte, 1)
+	if err := ct.Write(s, d, &Options{Last: true, Delay: false}); err != nil && err != io.EOF {
+		t.Fatalf("Failed to write: %v", err)
+	}
+	// Read without window update.
+	for {
+		p := make([]byte, http2MaxFrameLen)
+		if _, err = s.dec.Read(p); err != nil {
+			break
+		}
+	}
+	if s.fc.pendingData <= initialWindowSize || s.fc.pendingUpdate != 0 || conn.fc.pendingData <= initialWindowSize || conn.fc.pendingUpdate != 0 {
+		t.Fatalf("Client mistakenly updates inbound flow control params: got %d, %d, %d, %d; want >%d, %d, >%d, %d", s.fc.pendingData, s.fc.pendingUpdate, conn.fc.pendingData, conn.fc.pendingUpdate, initialWindowSize, 0, initialWindowSize, 0)
+	}
+	if err != io.EOF || s.statusCode != codes.Internal {
+		t.Fatalf("Got err %v and the status code %d, want <EOF> and the code %d", err, s.statusCode, codes.Internal)
+	}
+	conn.CloseStream(s, err)
+	if s.fc.pendingData != 0 || s.fc.pendingUpdate != 0 || conn.fc.pendingData != 0 || conn.fc.pendingUpdate <= initialWindowSize {
+		t.Fatalf("Client mistakenly resets inbound flow control params: got %d, %d, %d, %d; want 0, 0, 0, >%d", s.fc.pendingData, s.fc.pendingUpdate, conn.fc.pendingData, conn.fc.pendingUpdate, initialWindowSize)
+	}
+	// Test the logic for the violation of the connection flow control window size restriction.
+	//
+	// Generate enough streams to drain the connection window. Make the server flood the traffic
+	// to violate flow control window size of the connection.
+	callHdr.Method = "foo.Connection"
+	for i := 0; i < int(initialConnWindowSize/initialWindowSize+10); i++ {
+		s, err := ct.NewStream(context.Background(), callHdr)
+		if err != nil {
+			break
+		}
+		if err := ct.Write(s, d, &Options{Last: true, Delay: false}); err != nil {
+			break
+		}
+	}
+	// http2Client.errChan is closed due to connection flow control window size violation.
+	<-conn.Error()
+	ct.Close()
+	server.stop()
+}
+
+var (
+	encodingTestStatusCode = codes.Internal
+	encodingTestStatusDesc = "\n"
+)
+
+func TestEncodingRequiredStatus(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, encodingRequiredStatus)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo",
+	}
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		return
+	}
+	opts := Options{
+		Last:  true,
+		Delay: false,
+	}
+	if err := ct.Write(s, expectedRequest, &opts); err != nil && err != io.EOF {
+		t.Fatalf("Failed to write the request: %v", err)
+	}
+	p := make([]byte, http2MaxFrameLen)
+	if _, err := s.dec.Read(p); err != io.EOF {
+		t.Fatalf("Read got error %v, want %v", err, io.EOF)
+	}
+	if s.StatusCode() != encodingTestStatusCode || s.StatusDesc() != encodingTestStatusDesc {
+		t.Fatalf("stream with status code %d, status desc %v, want %d, %v", s.StatusCode(), s.StatusDesc(), encodingTestStatusCode, encodingTestStatusDesc)
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestInvalidHeaderField(t *testing.T) {
+	server, ct := setUp(t, 0, math.MaxUint32, invalidHeaderField)
+	callHdr := &CallHdr{
+		Host:   "localhost",
+		Method: "foo",
+	}
+	s, err := ct.NewStream(context.Background(), callHdr)
+	if err != nil {
+		return
+	}
+	opts := Options{
+		Last:  true,
+		Delay: false,
+	}
+	if err := ct.Write(s, expectedRequest, &opts); err != nil && err != io.EOF {
+		t.Fatalf("Failed to write the request: %v", err)
+	}
+	p := make([]byte, http2MaxFrameLen)
+	_, err = s.dec.Read(p)
+	if se, ok := err.(StreamError); !ok || se.Code != codes.FailedPrecondition || !strings.Contains(err.Error(), expectedInvalidHeaderField) {
+		t.Fatalf("Read got error %v, want error with code %s and contains %q", err, codes.FailedPrecondition, expectedInvalidHeaderField)
+	}
+	ct.Close()
+	server.stop()
+}
+
+func TestStreamContext(t *testing.T) {
+	expectedStream := &Stream{}
+	ctx := newContextWithStream(context.Background(), expectedStream)
+	s, ok := StreamFromContext(ctx)
+	if !ok || expectedStream != s {
+		t.Fatalf("GetStreamFromContext(%v) = %v, %t, want: %v, true", ctx, s, ok, expectedStream)
+	}
+}
+
+func TestIsReservedHeader(t *testing.T) {
+	tests := []struct {
+		h    string
+		want bool
+	}{
+		{"", false}, // but should be rejected earlier
+		{"foo", false},
+		{"content-type", true},
+		{"grpc-message-type", true},
+		{"grpc-encoding", true},
+		{"grpc-message", true},
+		{"grpc-status", true},
+		{"grpc-timeout", true},
+		{"te", true},
+	}
+	for _, tt := range tests {
+		got := isReservedHeader(tt.h)
+		if got != tt.want {
+			t.Errorf("isReservedHeader(%q) = %v; want %v", tt.h, got, tt.want)
+		}
+	}
+}