Exemplo n.º 1
0
        public void ReceiveCommPacket(G2ReceivedPacket raw, RudpPacket packet)
        {
            try
            {
                if (packet.PacketType == RudpPacketType.Light ||
                    packet.PacketType == RudpPacketType.LightAck)
                {
                    LightComm.ReceivePacket(raw, packet);
                    return;
                }

                // if a socket already set up
                lock (RudpControl.SocketMap)
                    if (RudpControl.SocketMap.ContainsKey(packet.PeerID))
                    {
                        RudpControl.SocketMap[packet.PeerID].RudpReceive(raw, packet, IsLookup);
                        return;
                    }

                // if starting new session
                if (packet.PacketType != RudpPacketType.Syn)
                    return;

                RudpSyn syn = new RudpSyn(packet.Payload);

                // prevent connection from self
                if (syn.SenderID == Local.UserID && syn.ClientID == Local.ClientID)
                    return;

                // find connecting session with same or unknown client id
                ulong id = syn.SenderID ^ syn.ClientID;

                if (RudpControl.SessionMap.ContainsKey(id))
                {
                    RudpSession session = RudpControl.SessionMap[id];

                    // if session id zero or matches forward
                    if ((session.Comm.State == RudpState.Connecting && session.Comm.RemotePeerID == 0) ||
                        (session.Comm.State != RudpState.Closed && session.Comm.RemotePeerID == syn.ConnID)) // duplicate syn
                    {
                        session.Comm.RudpReceive(raw, packet, IsLookup);
                        return;
                    }

                    else if (session.Comm.State == RudpState.Finishing)
                    {
                        RudpControl.RemoveSession(session);
                        // remove session, allow new one to be created
                    }
                    else
                        return;
                }

                // if clientid not in session, create new session
                RudpSession newSession = new RudpSession(RudpControl, syn.SenderID, syn.ClientID, true);

                RudpControl.SessionMap[id] = newSession;

                // send ack before sending our own syn (connect)
                // ack tells remote which address is good so that our syn's ack comes back quickly
                newSession.Comm.RudpReceive(raw, packet, IsLookup);

                newSession.Connect();

                UpdateLog("RUDP", "Inbound session accepted to ClientID " + syn.ClientID.ToString());
            }
            catch (Exception ex)
            {
                UpdateLog("Exception", "DhtNetwork::ReceiveCommPacket: " + ex.Message);
            }
        }
Exemplo n.º 2
0
        void ReceiveSyn(RudpPacket packet)
        {
            RudpSyn syn = new RudpSyn(packet.Payload);

            if(RemotePeerID == 0)
                RemotePeerID = syn.ConnID;

            //Session.Log("Syn Recv, Seq " + packet.Sequence.ToString() + ", ID " + syn.ConnID.ToString());

            SendAck(packet); // send ack here also because peerID now set

            SynAckSent = true;

            if(SynAckSent && SynAckReceieved)
            {
                Session.Log("Connected (recv syn)");
                ChangeState(RudpState.Connected);
                SetConnected();
            }
        }