protected override async Task BroadCastAction(CancellationToken token)
{
try
{
foreach (var interval in _intervals)
{
await Task.Delay(TimeSpan.FromSeconds(interval), token);
var message = new OnlineMessage(SuperDriveCore.LocalDevice);
var bytes = message.ToPacket().ToBytes();
if (token.IsCancellationRequested)
{
break;
}
Env.Logger.Log("+++Broadcast out" + message, nameof(LanDiscoverer));
SendUdp(bytes, _broadcastEndpoint);
}
}
catch (Exception e)
{
Env.Logger.Log("Broadcast exception", stackTrace: e.StackTrace);
}
//直接运行可能死锁。
#pragma warning disable 4014
// ReSharper disable once MethodSupportsCancellation
Task.Run(() => StopBroadcasting());
#pragma warning restore 4014
}
private void BroadcastTimer_Elapsed(object sender, ElapsedEventArgs e)
{
var idx = broadCastCount >= intervals.Length ? intervals.Length - 1 : broadCastCount;
if (broadCastCount++ > MAX_BROADCAST_TIME) //有限次数广播。如果是无限次数的，当broadcastCount>设定值，idx = intervals.Length-1
{
broadcastTimer.Stop();
}
else
{
var message = new OnlineMessage(localInfo);
var bytes = message.ToPacket().ToBytes();
udp.Send(null, bytes, udp.broadcastEndpoint);
var interval = intervals[idx];
broadcastTimer.Interval = interval;
broadcastTimer.Start();
}
}