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// Copyright (C) 2014,2015 Nippon Telegraph and Telephone Corporation.
//
// 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 api
import (
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/osrg/gobgp/packet"
"golang.org/x/net/context"
"google.golang.org/grpc"
"io"
"net"
)
const (
_ = iota
REQ_NEIGHBOR
REQ_NEIGHBORS
REQ_ADJ_RIB_IN
REQ_ADJ_RIB_OUT
REQ_LOCAL_RIB
REQ_NEIGHBOR_SHUTDOWN
REQ_NEIGHBOR_RESET
REQ_NEIGHBOR_SOFT_RESET
REQ_NEIGHBOR_SOFT_RESET_IN
REQ_NEIGHBOR_SOFT_RESET_OUT
REQ_NEIGHBOR_ENABLE
REQ_NEIGHBOR_DISABLE
REQ_GLOBAL_RIB
REQ_GLOBAL_ADD
REQ_GLOBAL_DELETE
)
const GRPC_PORT = 8080
type Server struct {
grpcServer *grpc.Server
bgpServerCh chan *GrpcRequest
}
func (s *Server) Serve() error {
lis, err := net.Listen("tcp", fmt.Sprintf(":%d", GRPC_PORT))
if err != nil {
return fmt.Errorf("failed to listen: %v", err)
}
s.grpcServer.Serve(lis)
return nil
}
func (s *Server) GetNeighbor(ctx context.Context, arg *Arguments) (*Peer, error) {
var rf bgp.RouteFamily
req := NewGrpcRequest(REQ_NEIGHBOR, arg.RouterId, rf, nil)
s.bgpServerCh <- req
res := <-req.ResponseCh
if err := res.Err(); err != nil {
log.Debug(err.Error())
return nil, err
}
return res.Data.(*Peer), nil
}
func (s *Server) GetNeighbors(_ *Arguments, stream Grpc_GetNeighborsServer) error {
var rf bgp.RouteFamily
req := NewGrpcRequest(REQ_NEIGHBORS, "", rf, nil)
s.bgpServerCh <- req
for res := range req.ResponseCh {
if err := res.Err(); err != nil {
log.Debug(err.Error())
return err
}
if err := stream.Send(res.Data.(*Peer)); err != nil {
return err
}
}
return nil
}
func (s *Server) GetAdjRib(arg *Arguments, stream Grpc_GetAdjRibServer) error {
var reqType int
switch arg.Resource {
case Resource_ADJ_IN:
reqType = REQ_ADJ_RIB_IN
case Resource_ADJ_OUT:
reqType = REQ_ADJ_RIB_OUT
default:
return fmt.Errorf("unsupported resource type: %v", arg.Resource)
}
var rf bgp.RouteFamily
switch arg.Af {
case AddressFamily_IPV4:
rf = bgp.RF_IPv4_UC
case AddressFamily_IPV6:
rf = bgp.RF_IPv6_UC
case AddressFamily_EVPN:
rf = bgp.RF_EVPN
default:
return fmt.Errorf("unsupported resource type: %v", arg.Af)
}
req := NewGrpcRequest(reqType, arg.RouterId, rf, nil)
s.bgpServerCh <- req
for res := range req.ResponseCh {
if err := res.Err(); err != nil {
log.Debug(err.Error())
return err
}
if err := stream.Send(res.Data.(*Path)); err != nil {
return err
}
}
return nil
}
func (s *Server) GetRib(arg *Arguments, stream Grpc_GetRibServer) error {
var reqType int
switch arg.Resource {
case Resource_LOCAL:
reqType = REQ_LOCAL_RIB
case Resource_GLOBAL:
reqType = REQ_GLOBAL_RIB
default:
return fmt.Errorf("unsupported resource type: %v", arg.Resource)
}
var rf bgp.RouteFamily
switch arg.Af {
case AddressFamily_IPV4:
rf = bgp.RF_IPv4_UC
case AddressFamily_IPV6:
rf = bgp.RF_IPv6_UC
case AddressFamily_EVPN:
rf = bgp.RF_EVPN
default:
return fmt.Errorf("unsupported resource type: %v", arg.Af)
}
req := NewGrpcRequest(reqType, arg.RouterId, rf, nil)
s.bgpServerCh <- req
for res := range req.ResponseCh {
if err := res.Err(); err != nil {
log.Debug(err.Error())
return err
}
if err := stream.Send(res.Data.(*Destination)); err != nil {
return err
}
}
return nil
}
func (s *Server) neighbor(reqType int, arg *Arguments) (*Error, error) {
var rf bgp.RouteFamily
switch arg.Af {
case AddressFamily_IPV4:
rf = bgp.RF_IPv4_UC
case AddressFamily_IPV6:
rf = bgp.RF_IPv6_UC
case AddressFamily_EVPN:
rf = bgp.RF_EVPN
default:
return nil, fmt.Errorf("unsupported resource type: %v", arg.Af)
}
none := &Error{}
req := NewGrpcRequest(reqType, arg.RouterId, rf, nil)
s.bgpServerCh <- req
res := <-req.ResponseCh
if err := res.Err(); err != nil {
log.Debug(err.Error())
return nil, err
}
return none, nil
}
func (s *Server) Reset(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_RESET, arg)
}
func (s *Server) SoftReset(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_SOFT_RESET, arg)
}
func (s *Server) SoftResetIn(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_SOFT_RESET_IN, arg)
}
func (s *Server) SoftResetOut(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_SOFT_RESET_OUT, arg)
}
func (s *Server) Shutdown(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_SHUTDOWN, arg)
}
func (s *Server) Enable(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_ENABLE, arg)
}
func (s *Server) Disable(ctx context.Context, arg *Arguments) (*Error, error) {
return s.neighbor(REQ_NEIGHBOR_DISABLE, arg)
}
func (s *Server) modPath(reqType int, stream grpc.ServerStream) error {
for {
var err error
var arg *Arguments
if reqType == REQ_GLOBAL_ADD {
arg, err = stream.(Grpc_AddPathServer).Recv()
} else if reqType == REQ_GLOBAL_DELETE {
arg, err = stream.(Grpc_DeletePathServer).Recv()
} else {
return fmt.Errorf("unsupportd req: %d", reqType)
}
if err == io.EOF {
return nil
} else if err != nil {
return err
}
if arg.Resource != Resource_GLOBAL {
return fmt.Errorf("unsupported resource: %s", arg.Resource)
}
prefix := make(map[string]interface{}, 1)
prefix["prefix"] = arg.Prefix
var rf bgp.RouteFamily
switch arg.Af {
case AddressFamily_IPV4:
rf = bgp.RF_IPv4_UC
case AddressFamily_IPV6:
rf = bgp.RF_IPv6_UC
case AddressFamily_EVPN:
rf = bgp.RF_EVPN
default:
return fmt.Errorf("unsupported resource type: %v", arg.Af)
}
req := NewGrpcRequest(reqType, arg.RouterId, rf, prefix)
s.bgpServerCh <- req
res := <-req.ResponseCh
if err := res.Err(); err != nil {
log.Debug(err.Error())
return err
}
}
}
func (s *Server) AddPath(stream Grpc_AddPathServer) error {
return s.modPath(REQ_GLOBAL_ADD, stream)
}
func (s *Server) DeletePath(stream Grpc_DeletePathServer) error {
return s.modPath(REQ_GLOBAL_DELETE, stream)
}
type GrpcRequest struct {
RequestType int
RemoteAddr string
RouteFamily bgp.RouteFamily
ResponseCh chan *GrpcResponse
Err error
Data map[string]interface{}
}
func NewGrpcRequest(reqType int, remoteAddr string, rf bgp.RouteFamily, d map[string]interface{}) *GrpcRequest {
r := &GrpcRequest{
RequestType: reqType,
RouteFamily: rf,
RemoteAddr: remoteAddr,
ResponseCh: make(chan *GrpcResponse),
Data: d,
}
return r
}
type GrpcResponse struct {
ResponseErr error
Data interface{}
}
func (r *GrpcResponse) Err() error {
return r.ResponseErr
}
func NewGrpcServer(port int, bgpServerCh chan *GrpcRequest) *Server {
grpcServer := grpc.NewServer()
server := &Server{
grpcServer: grpcServer,
bgpServerCh: bgpServerCh,
}
RegisterGrpcServer(grpcServer, server)
return server
}
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