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Example for gRPC over SCION/QUIC

This directory contains a small example program that shows how gRPC can be used over SCION/QUIC with the PAN library. The example consists of an echo server and a client that sends a message to the service.

Running

The example requires a running SCION endhost stack, i.e. a running SCION dispatcher and SCION daemon. Please refer to 'Running' in this repository's main README and the SCIONLab tutorials to get started. See 'Environment' on how to set the dispatcher and sciond environment variables when e.g. running multiple local ASes.

To test the server and client, run the SCION tiny test topology.

Open a shell and run the server in the AS 1-ff00:0:111:

# Server in 1-ff00:0:111
SCION_DAEMON_ADDRESS="127.0.0.20:30255" \
go run server/main.go --server-address 127.0.0.1:5000

Open a shell and run the client in the AS 1-ff00:0:112 and send a message to the server:

# Client in 1-ff00:0:112
SCION_DAEMON_ADDRESS="127.0.0.28:30255" \
go run client/main.go --server-address "1-ff00:0:111,127.0.0.1:5000" --message "gRPC over SCION/QUIC"

Protobuf

Tutorial: https://grpc.io/docs/languages/go/basics/

Requirements:

go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

The compiler plugin protoc-gen-go will be installed in $GOBIN, defaulting to $GOPATH/bin. It must be in your $PATH for the protocol compiler protoc to find it.

export GO_PATH=~/go
export PATH=$PATH:/$GO_PATH/bin

The generation of the gRPC client and server interface is performed as follows:

protoc --go_out=. --go_opt=paths=source_relative \
  --go-grpc_out=. --go-grpc_opt=paths=source_relative \
  proto/*.proto