func main() {
tcpTimeout := 180000 //ms
swProtocol := protocol.NewDefaultProtocol(nil, false)
dispatcher := protocol.NewDispatcher()
dispatcher.AddHandler(protocol.PKTTYPE_KEEPALIVEACK, onKeepaliveAck)
session, err := swnet.Dial("tcp4", "127.0.0.1:19905", swProtocol, dispatcher.Handle, 1024)
if err != nil {
fmt.Println("swnet.Dial failed, err:", err)
return
}
defer session.Close()
session.SetTimeout(time.Duration(tcpTimeout))
session.SetCloseCallback(func(*swnet.Session) {
fmt.Println("exit")
os.Exit(0)
})
session.Start()
req := protocol.NewKeepalive()
if err := session.AsyncSend(req); err != nil {
fmt.Println("session.AsyncSend, err:", err)
return
}
osSignal := make(chan os.Signal, 2)
signal.Notify(osSignal, os.Kill, os.Interrupt)
<-osSignal
}
func onKeepaliveAck(session *swnet.Session, packet protocol.Packet) {
fmt.Println("keepalive ack")
ack := packet.(*protocol.KeepaliveAck)
req := protocol.NewKeepalive()
req.Token = ack.Token + 1
req.Version = ack.Version
session.AsyncSend(req)
}