private void SendConnectionUdpMessages()
{
_isRunning = true;
var messageToServer = new InfoMessage
{
Id = _id,
LocalEndpoint = _localEndPoint.Convert()
};
var messageToPeer = new Udp_KeepaliveMessage();
while (_isRunning)
{
// while we haven't got the partner's address, we will send messages to server
if (_partnerPublicUdpEndPoint == null && _partnerLocalUdpEndPoint == null)
{
byte[] bytes = messageToServer.ToByteArray();
_udpPuncher.Send(bytes, bytes.Length, _serverUdpEndPoint);
Console.WriteLine($" >>> Sent UDP to server {_serverUdpEndPoint.Address}:{_serverUdpEndPoint.Port}");
}
else
{
// you can skip it. just a demonstration that you still can send messages to server
// _udpClient.Send(messageToServer.Data, messageToServer.Data.Length, _serverUdpEndPoint);
// Console.WriteLine($" >>> Sent UDP to server [ {_serverUdpEndPoint.Address} : {_serverUdpEndPoint.Port} ]");
// THIS is how we punch a hole! we expect the very first message to be dropped by the partner's NAT router
// i suppose that this is good idea to send this "keep-alive" messages to peer even if you have already connected,
// because AFAIK "hole" for UDP lives ~2 minutes on NAT. so "will we let it die? NEVER!" (c)
byte[] bytes = messageToPeer.ToByteArray();
_udpClient.Send(bytes, bytes.Length, _partnerPublicUdpEndPoint);
_udpClient.Send(bytes, bytes.Length, _partnerLocalUdpEndPoint);
Console.WriteLine($" >>> Sent UDP to peer.public [ {_partnerPublicUdpEndPoint.Address} : {_partnerPublicUdpEndPoint.Port} ]");
Console.WriteLine($" >>> Sent UDP to peer.local [ {_partnerLocalUdpEndPoint.Address} : {_partnerLocalUdpEndPoint.Port} ]");
// "connected" UdpClient sends data much faster,
// so if you have something that your partner cant wait for (voice, for example), send it this way
if (_extraUdpClientConnected)
{
_extraUdpClient.Send(bytes, bytes.Length);
Console.WriteLine($" >>> Sent UDP to peer.received EP");
}
}
Thread.Sleep(3000);
}
}