func main() {
laddr := flag.String("listen", ":8001", "listen address")
baddr := flag.String("backend", "127.0.0.1:1234", "backend address")
secret := flag.String("secret", "the answer to life, the universe and everything", "tunnel secret")
tunnels := flag.Uint("tunnels", 0, "low level tunnel count, 0 if work as server")
flag.Int64Var(&tunnel.Timeout, "timeout", 3, "tunnel read/write timeout")
flag.UintVar(&tunnel.LogLevel, "log", 1, "log level")
flag.Usage = usage
flag.Parse()
var app tunnel.Service
var err error
if *tunnels == 0 {
app, err = tunnel.NewServer(*laddr, *baddr, *secret)
} else {
app, err = tunnel.NewClient(*laddr, *baddr, *secret, *tunnels)
}
if err != nil {
fmt.Fprintf(os.Stderr, "create service failed:%s\n", err.Error())
return
}
if err = app.Start(); err != nil {
fmt.Fprintf(os.Stderr, "start failed:%s\n", err.Error())
return
}
handleSignal(app)
}
func handleSignal(app tunnel.Service) {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP)
for sig := range c {
switch sig {
case syscall.SIGHUP:
app.Status()
tunnel.Log("total goroutines:%d", runtime.NumGoroutine())
default:
tunnel.Log("catch signal:%v, exit", sig)
os.Exit(1)
}
}
}