public void StartListening()
{
OptionKeepAlive = true;
try
{
Start();
}
catch (Exception ex)
{
try
{
_natHandler?.CloseNAT();
}
catch
{
}
Logger.Error(ex, $"Unable to start the SRS Server {_serverSettings.GetServerIP()}:{_serverSettings.GetServerPort()}");
MessageBox.Show($"Unable to start the SRS Server\n\nLikely Port {_serverSettings.GetServerPort()} in use\n\nChange the port by editing the .cfg", "Port in use",
MessageBoxButton.OK, MessageBoxImage.Error);
Environment.Exit(0);
}
}
public void Listen()
{
//start threads
//packets that need processing
new Thread(ProcessPackets).Start();
//outgoing packets
new Thread(SendPendingPackets).Start();
transmissionLoggingQueue.Start();
var port = _serverSettings.GetServerPort();
_listener = new UdpClient();
try
{
_listener.AllowNatTraversal(true);
}
catch { }
_listener.ExclusiveAddressUse = true;
_listener.DontFragment = true;
_listener.Client.DontFragment = true;
_listener.Client.Bind(new IPEndPoint(_serverSettings.GetServerIP(), port));
while (!_stop)
{
try
{
var groupEP = new IPEndPoint(_serverSettings.GetServerIP(), port);
var rawBytes = _listener.Receive(ref groupEP);
if (rawBytes?.Length == 22)
{
try
{
//lookup guid here
//22 bytes are guid!
var guid = Encoding.ASCII.GetString(
rawBytes, 0, 22);
if (_clientsList.ContainsKey(guid))
{
var client = _clientsList[guid];
client.VoipPort = groupEP;
//send back ping UDP
_listener.Send(rawBytes, rawBytes.Length, groupEP);
}
}
catch (Exception ex)
{
//dont log because it slows down thread too much...
}
}
else if (rawBytes?.Length > 22)
{
_pendingProcessingPackets.Add(new PendingPacket
{
RawBytes = rawBytes,
ReceivedFrom = groupEP
});
}
}
catch (Exception e)
{
Logger.Error(e, "Error receving audio UDP for client " + e.Message);
}
}
try
{
_listener.Close();
}
catch (Exception e)
{
}
}