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// Copyright (C) 2014 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 server
import (
"fmt"
"github.com/osrg/gobgp/config"
"net"
"os"
"strconv"
"strings"
)
type BgpServer struct {
bgpConfig config.BgpType
globalTypeCh chan config.GlobalType
addedPeerCh chan config.NeighborType
deletedPeerCh chan config.NeighborType
listenPort int
}
func NewBgpServer(port int) *BgpServer {
b := BgpServer{}
b.globalTypeCh = make(chan config.GlobalType)
b.addedPeerCh = make(chan config.NeighborType)
b.deletedPeerCh = make(chan config.NeighborType)
b.listenPort = port
return &b
}
func (server *BgpServer) Serve() {
server.bgpConfig.Global = <-server.globalTypeCh
service := ":" + strconv.Itoa(server.listenPort)
addr, _ := net.ResolveTCPAddr("tcp", service)
l, err := net.ListenTCP("tcp4", addr)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
acceptCh := make(chan *net.TCPConn)
go func() {
for {
conn, err := l.Accept()
if err != nil {
fmt.Println(err)
continue
}
acceptCh <- conn.(*net.TCPConn)
}
}()
peerMap := make(map[string]*Peer)
for {
f, _ := l.File()
select {
case conn := <-acceptCh:
fmt.Println(conn)
remoteAddr := strings.Split(conn.RemoteAddr().String(), ":")[0]
peer, found := peerMap[remoteAddr]
if found {
fmt.Println("found neighbor", remoteAddr)
peer.PassConn(conn)
} else {
fmt.Println("can't found neighbor", remoteAddr)
conn.Close()
}
case peer := <-server.addedPeerCh:
fmt.Println(peer)
addr := peer.NeighborAddress.String()
SetTcpMD5SigSockopts(int(f.Fd()), addr, peer.AuthPassword)
p := NewPeer(server.bgpConfig.Global, peer)
peerMap[peer.NeighborAddress.String()] = p
case peer := <-server.deletedPeerCh:
fmt.Println(peer)
addr := peer.NeighborAddress.String()
SetTcpMD5SigSockopts(int(f.Fd()), addr, "")
p, found := peerMap[addr]
if found {
fmt.Println("found neighbor", addr)
p.Stop()
delete(peerMap, addr)
} else {
fmt.Println("can't found neighbor", addr)
}
}
}
}
func (server *BgpServer) SetGlobalType(g config.GlobalType) {
server.globalTypeCh <- g
}
func (server *BgpServer) PeerAdd(peer config.NeighborType) {
server.addedPeerCh <- peer
}
func (server *BgpServer) PeerDelete(peer config.NeighborType) {
server.deletedPeerCh <- peer
}
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