public void NatIntroduce(IPEndPoint hostInternal,
IPEndPoint hostExternal,
IPEndPoint clientInternal,
IPEndPoint clientExternal,
string additionalInfo)
{
var req = new NatIntroduceResponsePacket {
Token = additionalInfo
};
//First packet (server) send to client
req.Internal = hostInternal;
req.External = hostExternal;
Send(req, clientExternal);
//Second packet (client) send to server
req.Internal = clientInternal;
req.External = clientExternal;
Send(req, hostExternal);
}
//We got introduce and must punch
private void OnNatIntroductionResponse(NatIntroduceResponsePacket req)
{
NetDebug.Write(NetLogLevel.Trace, "[NAT] introduction received");
// send internal punch
var punchPacket = new NatPunchPacket {
Token = req.Token
};
Send(punchPacket, req.Internal);
NetDebug.Write(NetLogLevel.Trace, "[NAT] internal punch sent to " + req.Internal);
// hack for some routers
_socket.Ttl = 2;
_socket.SendRaw(new[] { (byte)PacketProperty.Empty }, 0, 1, req.External);
// send external punch
_socket.Ttl = NetConstants.SocketTTL;
punchPacket.IsExternal = true;
Send(punchPacket, req.External);
NetDebug.Write(NetLogLevel.Trace, "[NAT] external punch sent to " + req.External);
}