Add constants file

Signed-off-by: Vladimir Popov <vladimir.popov@xored.com>

pkg/kernel/const.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2020 Doc.ai and/or its affiliates.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//+build !linux
+
+package kernel
+
+const (
+	// FamilyAll is netlink.FAMILY_ALL
+	FamilyAll = 0x0
+	// NudReachable is netlink.NUD_REACHABLE
+	NudReachable = 0x02
+)

pkg/kernel/const_linux.go

@@ -0,0 +1,28 @@
+// Copyright (c) 2020 Doc.ai and/or its affiliates.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package kernel
+
+import (
+	"github.com/vishvananda/netlink"
+)
+
+const (
+	// FamilyAll is netlink.FAMILY_ALL
+	FAMILY_ALL = netlink.FAMILY_ALL
+	// NudReachable is netlink.NUD_REACHABLE
+	NUD_REACHABLE = netlink.NUD_REACHABLE
+)

pkg/kernel/link.go

@@ -84,7 +84,7 @@ func (l *link) AddAddress(ip string) error {
 	}
 
 	// check if address is already assigned
-	current, err := netlink.AddrList(l.link, 0x0) // netlink.FAMILY_ALL (linux-specific constant)
+	current, err := netlink.AddrList(l.link, FamilyAll)
 	if err != nil {
 		return errors.Errorf("failed to get current IP address list %q: %s", ip, err)
 	}

pkg/kernel/networkservice/connectioncontext/ipcontext/server.go

@@ -23,11 +23,14 @@ import (
 	"os"
 
 	"github.com/golang/protobuf/ptypes/empty"
-	"github.com/networkservicemesh/api/pkg/api/networkservice"
-	"github.com/networkservicemesh/api/pkg/api/networkservice/mechanisms/kernel"
-	"github.com/networkservicemesh/sdk/pkg/networkservice/core/next"
 	"github.com/pkg/errors"
 	"github.com/vishvananda/netlink"
+
+	"github.com/networkservicemesh/api/pkg/api/networkservice"
+	kernelmech "github.com/networkservicemesh/api/pkg/api/networkservice/mechanisms/kernel"
+	"github.com/networkservicemesh/sdk/pkg/networkservice/core/next"
+
+	"github.com/networkservicemesh/sdk-kernel/pkg/kernel"
 )
 
 type ipContextServer struct{}
@@ -38,7 +41,7 @@ func NewServer() networkservice.NetworkServiceServer {
 }
 
 func (s *ipContextServer) Request(ctx context.Context, request *networkservice.NetworkServiceRequest) (*networkservice.Connection, error) {
-	if mech := kernel.ToMechanism(request.GetConnection().GetMechanism()); mech != nil {
+	if mech := kernelmech.ToMechanism(request.GetConnection().GetMechanism()); mech != nil {
 		ifName := mech.GetInterfaceName(request.GetConnection())
 		link, err := netlink.LinkByName(ifName)
 		if err != nil {
@@ -71,7 +74,7 @@ func (s *ipContextServer) Request(ctx context.Context, request *networkservice.N
 }
 
 func setIPAddr(ipAddr *netlink.Addr, link netlink.Link) error {
-	ipAddrs, err := netlink.AddrList(link, 0x0) // netlink.FAMILY_ALL (linux-specific constant)
+	ipAddrs, err := netlink.AddrList(link, kernel.FamilyAll)
 	if err != nil {
 		return errors.Wrapf(err, "failed to get the net interface IP addresses: %v", link.Attrs().Name)
 	}
@@ -117,7 +120,7 @@ func setIPNeighbors(ipNeighbours []*networkservice.IpNeighbor, link netlink.Link
 		}
 		if err := netlink.NeighAdd(&netlink.Neigh{
 			LinkIndex:    link.Attrs().Index,
-			State:        0x02, // netlink.NUD_REACHABLE (linux-specific constant)
+			State:        kernel.NudReachable,
 			IP:           net.ParseIP(ipNeighbor.Ip),
 			HardwareAddr: macAddr,
 		}); err != nil && !os.IsExist(err) {