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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 main
import (
log "github.com/Sirupsen/logrus"
"github.com/Sirupsen/logrus/hooks/syslog"
"github.com/jessevdk/go-flags"
"github.com/osrg/gobgp/config"
"github.com/osrg/gobgp/packet"
"github.com/osrg/gobgp/server"
"io/ioutil"
"log/syslog"
"os"
"os/signal"
"runtime"
"strings"
"syscall"
)
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGHUP)
var opts struct {
ConfigFile string `short:"f" long:"config-file" description:"specifying a config file"`
LogLevel string `short:"l" long:"log-level" description:"specifying log level"`
LogPlain bool `short:"p" long:"log-plain" description:"use plain format for logging (json by default)"`
UseSyslog string `short:"s" long:"syslog" description:"use syslogd"`
Facility string `long:"syslog-facility" description:"specify syslog facility"`
DisableStdlog bool `long:"disable-stdlog" description:"disable standard logging"`
}
_, err := flags.Parse(&opts)
if err != nil {
os.Exit(1)
}
switch opts.LogLevel {
case "debug":
log.SetLevel(log.DebugLevel)
case "info":
log.SetLevel(log.InfoLevel)
default:
log.SetLevel(log.InfoLevel)
}
if opts.DisableStdlog == true {
log.SetOutput(ioutil.Discard)
} else {
log.SetOutput(os.Stdout)
}
if opts.UseSyslog != "" {
dst := strings.SplitN(opts.UseSyslog, ":", 2)
network := ""
addr := ""
if len(dst) == 2 {
network = dst[0]
addr = dst[1]
}
facility := syslog.Priority(0)
switch opts.Facility {
case "kern":
facility = syslog.LOG_KERN
case "user":
facility = syslog.LOG_USER
case "mail":
facility = syslog.LOG_MAIL
case "daemon":
facility = syslog.LOG_DAEMON
case "auth":
facility = syslog.LOG_AUTH
case "syslog":
facility = syslog.LOG_SYSLOG
case "lpr":
facility = syslog.LOG_LPR
case "news":
facility = syslog.LOG_NEWS
case "uucp":
facility = syslog.LOG_UUCP
case "cron":
facility = syslog.LOG_CRON
case "authpriv":
facility = syslog.LOG_AUTHPRIV
case "ftp":
facility = syslog.LOG_FTP
case "local0":
facility = syslog.LOG_LOCAL0
case "local1":
facility = syslog.LOG_LOCAL1
case "local2":
facility = syslog.LOG_LOCAL2
case "local3":
facility = syslog.LOG_LOCAL3
case "local4":
facility = syslog.LOG_LOCAL4
case "local5":
facility = syslog.LOG_LOCAL5
case "local6":
facility = syslog.LOG_LOCAL6
case "local7":
facility = syslog.LOG_LOCAL7
}
hook, err := logrus_syslog.NewSyslogHook(network, addr, syslog.LOG_INFO|facility, "bgpd")
if err != nil {
log.Error("Unable to connect to syslog daemon, ", opts.UseSyslog)
os.Exit(1)
} else {
log.AddHook(hook)
}
}
if opts.LogPlain == false {
log.SetFormatter(&log.JSONFormatter{})
}
if opts.ConfigFile == "" {
opts.ConfigFile = "gobgpd.conf"
}
configCh := make(chan config.BgpConfigSet)
reloadCh := make(chan bool)
go config.ReadConfigfileServe(opts.ConfigFile, configCh, reloadCh)
reloadCh <- true
bgpServer := server.NewBgpServer(bgp.BGP_PORT)
go bgpServer.Serve()
// start grpc Server
grpcServer := server.NewGrpcServer(server.GRPC_PORT, bgpServer.GrpcReqCh)
go grpcServer.Serve()
var bgpConfig *config.Bgp = nil
var policyConfig *config.RoutingPolicy = nil
for {
select {
case newConfig := <-configCh:
var added []config.Neighbor
var deleted []config.Neighbor
if bgpConfig == nil {
bgpServer.SetGlobalType(newConfig.Bgp.Global)
bgpConfig = &newConfig.Bgp
added = newConfig.Bgp.NeighborList
deleted = []config.Neighbor{}
} else {
bgpConfig, added, deleted = config.UpdateConfig(bgpConfig, &newConfig.Bgp)
}
if policyConfig == nil {
policyConfig = &newConfig.Policy
bgpServer.SetPolicy(newConfig.Policy)
} else {
if config.CheckPolicyDifference(policyConfig, &newConfig.Policy) {
log.Info("Policy config is updated")
bgpServer.UpdatePolicy(newConfig.Policy)
}
}
for _, p := range added {
log.Infof("Peer %v is added", p.NeighborAddress)
bgpServer.PeerAdd(p)
}
for _, p := range deleted {
log.Infof("Peer %v is deleted", p.NeighborAddress)
bgpServer.PeerDelete(p)
}
case sig := <-sigCh:
switch sig {
case syscall.SIGHUP:
log.Info("reload the config file")
reloadCh <- true
}
}
}
}
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