// Send a time/keepalive packet
func (game *Game) sendTimeUpdate() {
buf := new(bytes.Buffer)
proto.ServerWriteTimeUpdate(buf, game.time)
// The "keep-alive" packet to client(s) sent here as well, as there
// seems no particular reason to send time and keep-alive separately
// for now.
proto.WriteKeepAlive(buf)
game.multicastPacket(buf.Bytes(), nil)
}
// pingNew starts a new "keep-alive" ping.
func (player *Player) pingNew() {
if player.ping.running {
log.Printf("%v: Attempted to start a ping while another is running.", player)
} else {
if player.ping.timer != nil {
player.ping.timer.Stop()
}
player.ping.running = true
player.ping.id = rand.Int31()
if player.ping.id == 0 {
// Ping ID 0 is used by the client on occasion. Don't use this ID to
// avoid misreading keep alive IDs.
player.ping.id = 1
}
player.ping.timestampNs = time.Now().UnixNano()
buf := new(bytes.Buffer)
proto.WriteKeepAlive(buf, player.ping.id)
player.TransmitPacket(buf.Bytes())
player.ping.timer = time.NewTimer(PingTimeoutNs)
}
}