Example #1
0
        public static void Run(NetPeer peer)
        {
            NetPeerConfiguration config = new NetPeerConfiguration("Test");

            config.EnableMessageType(NetIncomingMessageType.UnconnectedData);
            if (config.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData) == false)
                throw new NetException("setting enabled message types failed");

            config.SetMessageTypeEnabled(NetIncomingMessageType.UnconnectedData, false);
            if (config.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData) == true)
                throw new NetException("setting enabled message types failed");

            Console.WriteLine("Misc tests OK");

            Console.WriteLine("Hex test: " + NetUtility.ToHexString(new byte[]{0xDE,0xAD,0xBE,0xEF}));
        }
        internal void SetStatus(NetConnectionStatus status, NetConnectionResult reason)
        {
            // user or library thread

            m_status = status;

            if (m_status == NetConnectionStatus.Connected)
            {
                m_timeoutDeadline = NetTime.Now + m_peerConfiguration.m_connectionTimeout;
                m_peer.LogVerbose("Timeout deadline initialized to  " + m_timeoutDeadline);
            }

            if (m_peerConfiguration.IsMessageTypeEnabled(NetIncomingMessageType.StatusChanged))
            {
                if (m_outputtedStatus != status)
                {
                    NetIncomingMessage info = m_peer.CreateIncomingMessage(NetIncomingMessageType.StatusChanged, 1);
                    info.m_senderConnection = this;
                    info.m_senderEndPoint   = m_remoteEndPoint;
                    info.Write((byte)m_status);
                    info.Write((byte)reason);
                    m_peer.ReleaseMessage(info);
                    m_outputtedStatus = status;
                }
            }
            else
            {
                // app dont want those messages, update visible status immediately
                m_outputtedStatus = m_status;
                m_visibleStatus   = m_status;
            }
        }
Example #3
0
        internal void SetStatus(NetConnectionStatus status, string reason)
        {
            // user or library thread

            if (status == m_status)
            {
                return;
            }
            m_status = status;
            if (reason == null)
            {
                reason = string.Empty;
            }

            if (m_status == NetConnectionStatus.Connected)
            {
                m_timeoutDeadline = (float)NetTime.Now + m_peerConfiguration.m_connectionTimeout;
                m_peer.LogVerbose("Timeout deadline initialized to  " + m_timeoutDeadline);
            }

            if (m_peerConfiguration.IsMessageTypeEnabled(NetIncomingMessageType.StatusChanged))
            {
                NetIncomingMessage info = m_peer.CreateIncomingMessage(NetIncomingMessageType.StatusChanged, 4 + reason.Length + (reason.Length > 126 ? 2 : 1));
                info.m_senderConnection = this;
                info.m_senderEndpoint   = m_remoteEndpoint;
                info.Write((byte)m_status);
                info.Write(reason);
                m_peer.ReleaseMessage(info);
            }
            else
            {
                // app dont want those messages, update visible status immediately
                m_visibleStatus = m_status;
            }
        }
        internal void Init(int port)
        {
            InitMessageHandler();

              int receiveBufferSize = 64;
              int sendBufferSize = 64;
              StringBuilder sb = new StringBuilder(256);
              if (CenterClientApi.GetConfig("ReceiveBufferSize", sb, 256)) {
            receiveBufferSize = int.Parse(sb.ToString());
              }
              if (CenterClientApi.GetConfig("SendBufferSize", sb, 256)) {
            sendBufferSize = int.Parse(sb.ToString());
              }

              m_Config = new NetPeerConfiguration("RoomServer");
              m_Config.MaximumConnections = 1024;
              m_Config.SocketReceiveBufferSize = receiveBufferSize * 1024 * 1024;
              m_Config.SocketSendBufferSize = sendBufferSize * 1024 * 1024;
              m_Config.Port = port;
              m_Config.DisableMessageType(NetIncomingMessageType.DebugMessage);
              m_Config.DisableMessageType(NetIncomingMessageType.VerboseDebugMessage);
              //m_Config.EnableMessageType(NetIncomingMessageType.DebugMessage);
              //m_Config.EnableMessageType(NetIncomingMessageType.VerboseDebugMessage);
              m_Config.EnableMessageType(NetIncomingMessageType.ErrorMessage);
              m_Config.EnableMessageType(NetIncomingMessageType.WarningMessage);

              if (m_Config.IsMessageTypeEnabled(NetIncomingMessageType.DebugMessage))
            LogSys.Log(LOG_TYPE.DEBUG, "Enable NetIncomingMessageType.DebugMessage");
              if (m_Config.IsMessageTypeEnabled(NetIncomingMessageType.VerboseDebugMessage))
            LogSys.Log(LOG_TYPE.DEBUG, "Enable NetIncomingMessageType.VerboseDebugMessage");
              if (m_Config.IsMessageTypeEnabled(NetIncomingMessageType.ErrorMessage))
            LogSys.Log(LOG_TYPE.DEBUG, "Enable NetIncomingMessageType.ErrorMessage");
              if (m_Config.IsMessageTypeEnabled(NetIncomingMessageType.WarningMessage))
            LogSys.Log(LOG_TYPE.DEBUG, "Enable NetIncomingMessageType.WarningMessage");

              m_NetServer = new NetServer(m_Config);
              m_NetServer.Start();
              m_IOThread = new Thread(new ThreadStart(IOHandler));
              m_IOThread.Name = "IOHandler";
              m_IOThread.IsBackground = true;
              m_Status = RoomSrvStatus.STATUS_RUNNING;
              m_IOThread.Start();
              RoomPeerMgr.Instance.Init();
              Console.WriteLine("Init IOManager OK!");
        }
Example #5
0
        internal void SetStatus(NetConnectionStatus status, NetReason reason)
        {
            // user or library thread

            m_status = status;

            if (m_status == NetConnectionStatus.Connected)
            {
                m_timeoutDeadline = NetTime.Now + m_peerConfiguration.m_connectionTimeout;
                m_peer.LogVerbose("Timeout deadline initialized to  " + m_timeoutDeadline);
            }

            if (m_peerConfiguration.IsMessageTypeEnabled(NetIncomingMessageType.StatusChanged))
            {
                if (m_outputtedStatus != status)
                {
                    var outgoingMessage = reason.Message;
                    var info            = m_peer.CreateIncomingMessage(NetIncomingMessageType.StatusChanged, 1 + reason.Length);
                    info.Write((byte)m_status);
                    if (outgoingMessage != null)
                    {
                        Buffer.BlockCopy(outgoingMessage.m_data, 0, info.m_data, 1, outgoingMessage.LengthBytes);
                        info.m_bitLength = outgoingMessage.m_bitLength;
                    }
                    else
                    {
                        info.Write(reason.Text);
                    }

                    info.m_senderConnection = this;
                    info.m_senderEndPoint   = m_remoteEndPoint;
                    m_peer.ReleaseMessage(info);
                    m_outputtedStatus = status;
                }
            }
            else
            {
                // app dont want those messages, update visible status immediately
                m_outputtedStatus = m_status;
                m_visibleStatus   = m_status;
            }
        }
Example #6
0
        private void Heartbeat()
        {
            VerifyNetworkThread();

            double dnow = NetTime.Now;
            float  now  = (float)dnow;

            double delta = dnow - m_lastHeartbeat;

            int maxCHBpS = 1250 - m_connections.Count;

            if (maxCHBpS < 250)
            {
                maxCHBpS = 250;
            }
            if (delta > (1.0 / (double)maxCHBpS))             // max connection heartbeats/second max
            {
                m_frameCounter++;
                m_lastHeartbeat = dnow;

                // do handshake heartbeats
                if ((m_frameCounter % 3) == 0)
                {
                    foreach (var kvp in m_handshakes)
                    {
                        NetConnection conn = kvp.Value as NetConnection;
#if DEBUG
                        // sanity check
                        if (kvp.Key != kvp.Key)
                        {
                            LogWarning("Sanity fail! Connection in handshake list under wrong key!");
                        }
#endif
                        conn.UnconnectedHeartbeat(now);
                        if (conn.m_status == NetConnectionStatus.Connected || conn.m_status == NetConnectionStatus.Disconnected)
                        {
#if DEBUG
                            // sanity check
                            if (conn.m_status == NetConnectionStatus.Disconnected && m_handshakes.ContainsKey(conn.RemoteEndpoint))
                            {
                                LogWarning("Sanity fail! Handshakes list contained disconnected connection!");
                                m_handshakes.Remove(conn.RemoteEndpoint);
                            }
#endif
                            break;                             // collection has been modified
                        }
                    }
                }

#if DEBUG
                SendDelayedPackets();
#endif

                // update m_executeFlushSendQueue
                if (m_configuration.m_autoFlushSendQueue)
                {
                    m_executeFlushSendQueue = true;
                }

                // do connection heartbeats
                lock (m_connections)
                {
                    foreach (NetConnection conn in m_connections)
                    {
                        conn.Heartbeat(now, m_frameCounter);
                        if (conn.m_status == NetConnectionStatus.Disconnected)
                        {
                            //
                            // remove connection
                            //
                            m_connections.Remove(conn);
                            m_connectionLookup.Remove(conn.RemoteEndpoint);
                            break;                             // can't continue iteration here
                        }
                    }
                }
                m_executeFlushSendQueue = false;

                // send unsent unconnected messages
                NetTuple <IPEndPoint, NetOutgoingMessage> unsent;
                while (m_unsentUnconnectedMessages.TryDequeue(out unsent))
                {
                    NetOutgoingMessage om = unsent.Item2;

                    bool connReset;
                    int  len = om.Encode(m_sendBuffer, 0, 0);
                    SendPacket(len, unsent.Item1, 1, out connReset);

                    Interlocked.Decrement(ref om.m_recyclingCount);
                    if (om.m_recyclingCount <= 0)
                    {
                        Recycle(om);
                    }
                }
            }

            //
            // read from socket
            //
            if (m_socket == null)
            {
                return;
            }

            if (!m_socket.Poll(1000, SelectMode.SelectRead))             // wait up to 1 ms for data to arrive
            {
                return;
            }

            //if (m_socket == null || m_socket.Available < 1)
            //	return;

            do
            {
                int bytesReceived = 0;
                try
                {
                    bytesReceived = m_socket.ReceiveFrom(m_receiveBuffer, 0, m_receiveBuffer.Length, SocketFlags.None, ref m_senderRemote);
                }
                catch (SocketException sx)
                {
                    if (sx.SocketErrorCode == SocketError.ConnectionReset)
                    {
                        // connection reset by peer, aka connection forcibly closed aka "ICMP port unreachable"
                        // we should shut down the connection; but m_senderRemote seemingly cannot be trusted, so which connection should we shut down?!
                        // So, what to do?
                        LogWarning("ConnectionReset");
                        return;
                    }

                    LogWarning(sx.ToString());
                    return;
                }

                if (bytesReceived < NetConstants.HeaderByteSize)
                {
                    return;
                }

                //LogVerbose("Received " + bytesReceived + " bytes");

                IPEndPoint ipsender = (IPEndPoint)m_senderRemote;

                if (ipsender.Port == 1900)
                {
                    // UPnP response
                    try
                    {
                        string resp = System.Text.Encoding.ASCII.GetString(m_receiveBuffer, 0, bytesReceived);
                        if (resp.Contains("upnp:rootdevice"))
                        {
                            resp = resp.Substring(resp.ToLower().IndexOf("location:") + 9);
                            resp = resp.Substring(0, resp.IndexOf("\r")).Trim();
                            m_upnp.ExtractServiceUrl(resp);
                            return;
                        }
                    }
                    catch { }
                }

                NetConnection sender = null;
                m_connectionLookup.TryGetValue(ipsender, out sender);

                double receiveTime = NetTime.Now;
                //
                // parse packet into messages
                //
                int numMessages = 0;
                int ptr         = 0;
                while ((bytesReceived - ptr) >= NetConstants.HeaderByteSize)
                {
                    // decode header
                    //  8 bits - NetMessageType
                    //  1 bit  - Fragment?
                    // 15 bits - Sequence number
                    // 16 bits - Payload length in bits

                    numMessages++;

                    NetMessageType tp = (NetMessageType)m_receiveBuffer[ptr++];

                    byte low  = m_receiveBuffer[ptr++];
                    byte high = m_receiveBuffer[ptr++];

                    bool   isFragment     = ((low & 1) == 1);
                    ushort sequenceNumber = (ushort)((low >> 1) | (((int)high) << 7));

                    ushort payloadBitLength  = (ushort)(m_receiveBuffer[ptr++] | (m_receiveBuffer[ptr++] << 8));
                    int    payloadByteLength = NetUtility.BytesToHoldBits(payloadBitLength);

                    if (bytesReceived - ptr < payloadByteLength)
                    {
                        LogWarning("Malformed packet; stated payload length " + payloadByteLength + ", remaining bytes " + (bytesReceived - ptr));
                        return;
                    }

                    try
                    {
                        NetException.Assert(tp <NetMessageType.Unused1 || tp> NetMessageType.Unused29);

                        if (tp >= NetMessageType.LibraryError)
                        {
                            if (sender != null)
                            {
                                sender.ReceivedLibraryMessage(tp, ptr, payloadByteLength);
                            }
                            else
                            {
                                ReceivedUnconnectedLibraryMessage(receiveTime, ipsender, tp, ptr, payloadByteLength);
                            }
                        }
                        else
                        {
                            if (sender == null && !m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData))
                            {
                                return;                                 // dropping unconnected message since it's not enabled
                            }
                            NetIncomingMessage msg = CreateIncomingMessage(NetIncomingMessageType.Data, payloadByteLength);
                            msg.m_isFragment          = isFragment;
                            msg.m_receiveTime         = receiveTime;
                            msg.m_sequenceNumber      = sequenceNumber;
                            msg.m_receivedMessageType = tp;
                            msg.m_senderConnection    = sender;
                            msg.m_senderEndpoint      = ipsender;
                            msg.m_bitLength           = payloadBitLength;
                            Buffer.BlockCopy(m_receiveBuffer, ptr, msg.m_data, 0, payloadByteLength);
                            if (sender != null)
                            {
                                if (tp == NetMessageType.Unconnected)
                                {
                                    // We're connected; but we can still send unconnected messages to this peer
                                    msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                                    ReleaseMessage(msg);
                                }
                                else
                                {
                                    // connected application (non-library) message
                                    sender.ReceivedMessage(msg);
                                }
                            }
                            else
                            {
                                // at this point we know the message type is enabled
                                // unconnected application (non-library) message
                                msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                                ReleaseMessage(msg);
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        LogError("Packet parsing error: " + ex.Message + " from " + ipsender);
                    }
                    ptr += payloadByteLength;
                }

                m_statistics.PacketReceived(bytesReceived, numMessages);
                if (sender != null)
                {
                    sender.m_statistics.PacketReceived(bytesReceived, numMessages);
                }
            } while (m_socket.Available > 0);
        }
Example #7
0
        private void ReceiveSocketData(double now)
        {
            int bytesReceived = m_socket.ReceiveFrom(m_receiveBuffer, 0, m_receiveBuffer.Length, SocketFlags.None, ref m_senderRemote);

            if (bytesReceived < NetConstants.HeaderByteSize)
            {
                return;
            }

            //LogVerbose("Received " + bytesReceived + " bytes");

            var ipsender = (NetEndPoint)m_senderRemote;

            if (m_upnp != null && now < m_upnp.m_discoveryResponseDeadline && bytesReceived > 32)
            {
                // is this an UPnP response?
                string resp = System.Text.Encoding.UTF8.GetString(m_receiveBuffer, 0, bytesReceived);
                if (resp.Contains("upnp:rootdevice") || resp.Contains("UPnP/1.0"))
                {
                    try
                    {
                        resp = resp.Substring(resp.ToLower().IndexOf("location:") + 9);
                        resp = resp.Substring(0, resp.IndexOf("\r")).Trim();
                        m_upnp.ExtractServiceUrl(resp);
                        return;
                    }
                    catch (Exception ex)
                    {
                        LogDebug("Failed to parse UPnP response: " + ex.ToString());

                        // don't try to parse this packet further
                        return;
                    }
                }
            }

            NetConnection sender = null;

            m_connectionLookup.TryGetValue(ipsender, out sender);

            //
            // parse packet into messages
            //
            int numMessages  = 0;
            int numFragments = 0;
            int ptr          = 0;

            while ((bytesReceived - ptr) >= NetConstants.HeaderByteSize)
            {
                // decode header
                //  8 bits - NetMessageType
                //  1 bit  - Fragment?
                // 15 bits - Sequence number
                // 16 bits - Payload length in bits

                numMessages++;

                NetMessageType tp = (NetMessageType)m_receiveBuffer[ptr++];

                byte low  = m_receiveBuffer[ptr++];
                byte high = m_receiveBuffer[ptr++];

                bool   isFragment     = ((low & 1) == 1);
                ushort sequenceNumber = (ushort)((low >> 1) | (((int)high) << 7));

                if (isFragment)
                {
                    numFragments++;
                }

                ushort payloadBitLength  = (ushort)(m_receiveBuffer[ptr++] | (m_receiveBuffer[ptr++] << 8));
                int    payloadByteLength = NetUtility.BytesToHoldBits(payloadBitLength);

                if (bytesReceived - ptr < payloadByteLength)
                {
                    LogWarning("Malformed packet; stated payload length " + payloadByteLength + ", remaining bytes " + (bytesReceived - ptr));
                    return;
                }

                if (tp >= NetMessageType.Unused1 && tp <= NetMessageType.Unused29)
                {
                    ThrowOrLog("Unexpected NetMessageType: " + tp);
                    return;
                }

                try
                {
                    if (tp >= NetMessageType.LibraryError)
                    {
                        if (sender != null)
                        {
                            sender.ReceivedLibraryMessage(tp, ptr, payloadByteLength);
                        }
                        else
                        {
                            ReceivedUnconnectedLibraryMessage(now, ipsender, tp, ptr, payloadByteLength);
                        }
                    }
                    else
                    {
                        if (sender == null && !m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData))
                        {
                            return;                             // dropping unconnected message since it's not enabled
                        }
                        NetIncomingMessage msg = CreateIncomingMessage(NetIncomingMessageType.Data, payloadByteLength);
                        msg.m_isFragment          = isFragment;
                        msg.m_receiveTime         = now;
                        msg.m_sequenceNumber      = sequenceNumber;
                        msg.m_receivedMessageType = tp;
                        msg.m_senderConnection    = sender;
                        msg.m_senderEndPoint      = ipsender;
                        msg.m_bitLength           = payloadBitLength;

                        Buffer.BlockCopy(m_receiveBuffer, ptr, msg.m_data, 0, payloadByteLength);
                        if (sender != null)
                        {
                            if (tp == NetMessageType.Unconnected)
                            {
                                // We're connected; but we can still send unconnected messages to this peer
                                msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                                ReleaseMessage(msg);
                            }
                            else
                            {
                                // connected application (non-library) message
                                sender.ReceivedMessage(msg);
                            }
                        }
                        else
                        {
                            // at this point we know the message type is enabled
                            // unconnected application (non-library) message
                            msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                            ReleaseMessage(msg);
                        }
                    }
                }
                catch (Exception ex)
                {
                    LogError("Packet parsing error: " + ex.Message + " from " + ipsender);
                }
                ptr += payloadByteLength;
            }

            m_statistics.PacketReceived(bytesReceived, numMessages, numFragments);
            if (sender != null)
            {
                sender.m_statistics.PacketReceived(bytesReceived, numMessages, numFragments);
            }
        }
Example #8
0
        private void Heartbeat()
        {
            VerifyNetworkThread();

            double now   = NetTime.Now;
            double delta = now - m_lastHeartbeat;

            int maxCHBpS = 1250 - m_connections.Count;

            if (maxCHBpS < 250)
            {
                maxCHBpS = 250;
            }
            if (delta > (1.0 / (double)maxCHBpS) || delta < 0.0)             // max connection heartbeats/second max
            {
                m_frameCounter++;
                m_lastHeartbeat = now;

                // do handshake heartbeats
                if ((m_frameCounter % 3) == 0)
                {
                    foreach (var kvp in m_handshakes)
                    {
                        NetConnection conn = kvp.Value as NetConnection;
#if DEBUG
                        // sanity check
                        if (kvp.Key != kvp.Key)
                        {
                            LogWarning("Sanity fail! Connection in handshake list under wrong key!");
                        }
#endif
                        conn.UnconnectedHeartbeat(now);
                        if (conn.m_status == NetConnectionStatus.Connected || conn.m_status == NetConnectionStatus.Disconnected)
                        {
#if DEBUG
                            // sanity check
                            if (conn.m_status == NetConnectionStatus.Disconnected && m_handshakes.ContainsKey(conn.RemoteEndPoint))
                            {
                                LogWarning("Sanity fail! Handshakes list contained disconnected connection!");
                                m_handshakes.Remove(conn.RemoteEndPoint);
                            }
#endif
                            break;                             // collection has been modified
                        }
                    }
                }

#if DEBUG
                SendDelayedPackets();
#endif

                // update m_executeFlushSendQueue
                if (m_configuration.m_autoFlushSendQueue && m_needFlushSendQueue == true)
                {
                    m_executeFlushSendQueue = true;
                    m_needFlushSendQueue    = false;                  // a race condition to this variable will simply result in a single superfluous call to FlushSendQueue()
                }

                // do connection heartbeats
                lock (m_connections)
                {
                    for (int i = m_connections.Count - 1; i >= 0; i--)
                    {
                        var conn = m_connections[i];
                        conn.Heartbeat(now, m_frameCounter);
                        if (conn.m_status == NetConnectionStatus.Disconnected)
                        {
                            //
                            // remove connection
                            //
                            m_connections.RemoveAt(i);
                            m_connectionLookup.Remove(conn.RemoteEndPoint);
                        }
                    }
                }
                m_executeFlushSendQueue = false;

                // send unsent unconnected messages
                NetTuple <NetEndPoint, NetOutgoingMessage> unsent;
                while (m_unsentUnconnectedMessages.TryDequeue(out unsent))
                {
                    NetOutgoingMessage om = unsent.Item2;

                    int len = om.Encode(m_sendBuffer, 0, 0);

                    Interlocked.Decrement(ref om.m_recyclingCount);
                    if (om.m_recyclingCount <= 0)
                    {
                        Recycle(om);
                    }

                    bool connReset;
                    SendPacket(len, unsent.Item1, 1, out connReset);
                }
            }

            if (m_upnp != null)
            {
                m_upnp.CheckForDiscoveryTimeout();
            }

            //
            // read from socket
            //
            if (m_socket == null)
            {
                return;
            }

            if (!m_socket.Poll(1000, SelectMode.SelectRead))             // wait up to 1 ms for data to arrive
            {
                return;
            }

            //if (m_socket == null || m_socket.Available < 1)
            //	return;

            // update now
            now = NetTime.Now;

            do
            {
                int bytesReceived = 0;
                try
                {
                    bytesReceived = m_socket.ReceiveFrom(m_receiveBuffer, 0, m_receiveBuffer.Length, SocketFlags.None, ref m_senderRemote);
                    //UnityEngine.Debug.Log($"recv from {m_senderRemote}, bytes {bytesReceived}, local {m_socket.LocalEndPoint}");
                }
                catch (SocketException sx)
                {
                    switch (sx.SocketErrorCode)
                    {
                    case SocketError.ConnectionReset:
                        // connection reset by peer, aka connection forcibly closed aka "ICMP port unreachable"
                        // we should shut down the connection; but m_senderRemote seemingly cannot be trusted, so which connection should we shut down?!
                        // So, what to do?
                        LogWarning("ConnectionReset");
                        return;

                    case SocketError.NotConnected:
                        // socket is unbound; try to rebind it (happens on mobile when process goes to sleep)
                        BindSocket(true);
                        return;

                    default:
                        LogWarning("Socket exception: " + sx.ToString());
                        return;
                    }
                }

                if (bytesReceived < NetConstants.HeaderByteSize)
                {
                    return;
                }

                //LogVerbose("Received " + bytesReceived + " bytes");

                var ipsender = (NetEndPoint)m_senderRemote;

                if (m_upnp != null && now < m_upnp.m_discoveryResponseDeadline && bytesReceived > 32)
                {
                    // is this an UPnP response?
                    string resp = System.Text.Encoding.UTF8.GetString(m_receiveBuffer, 0, bytesReceived);
                    if (resp.Contains("upnp:rootdevice") || resp.Contains("UPnP/1.0"))
                    {
                        try
                        {
                            resp = resp.Substring(resp.ToLower().IndexOf("location:") + 9);
                            resp = resp.Substring(0, resp.IndexOf("\r")).Trim();
                            m_upnp.ExtractServiceUrl(resp);
                            return;
                        }
                        catch (Exception ex)
                        {
                            LogDebug("Failed to parse UPnP response: " + ex.ToString());

                            // don't try to parse this packet further
                            return;
                        }
                    }
                }

                NetConnection sender = null;
                m_connectionLookup.TryGetValue(ipsender, out sender);

                //
                // parse packet into messages
                //
                int numMessages  = 0;
                int numFragments = 0;
                int ptr          = 0;
                while ((bytesReceived - ptr) >= NetConstants.HeaderByteSize)
                {
                    // decode header
                    //  8 bits - NetMessageType
                    //  1 bit  - Fragment?
                    // 15 bits - Sequence number
                    // 16 bits - Payload length in bits

                    numMessages++;

                    NetMessageType tp = (NetMessageType)m_receiveBuffer[ptr++];

                    byte low  = m_receiveBuffer[ptr++];
                    byte high = m_receiveBuffer[ptr++];

                    bool   isFragment     = ((low & 1) == 1);
                    ushort sequenceNumber = (ushort)((low >> 1) | (((int)high) << 7));

                    if (isFragment)
                    {
                        numFragments++;
                    }

                    ushort payloadBitLength  = (ushort)(m_receiveBuffer[ptr++] | (m_receiveBuffer[ptr++] << 8));
                    int    payloadByteLength = NetUtility.BytesToHoldBits(payloadBitLength);

                    if (bytesReceived - ptr < payloadByteLength)
                    {
                        LogWarning("Malformed packet; stated payload length " + payloadByteLength + ", remaining bytes " + (bytesReceived - ptr));
                        return;
                    }

                    if (tp >= NetMessageType.Unused1 && tp <= NetMessageType.Unused29)
                    {
                        ThrowOrLog("Unexpected NetMessageType: " + tp);
                        return;
                    }

                    try
                    {
                        if (tp >= NetMessageType.LibraryError)
                        {
                            if (sender != null)
                            {
                                sender.ReceivedLibraryMessage(tp, ptr, payloadByteLength);
                            }
                            else
                            {
                                ReceivedUnconnectedLibraryMessage(now, ipsender, tp, ptr, payloadByteLength);
                            }
                        }
                        else
                        {
                            if (sender == null && !m_configuration.IsMessageTypeEnabled(NetIncomingMessageType.UnconnectedData))
                            {
                                return;                                 // dropping unconnected message since it's not enabled
                            }
                            NetIncomingMessage msg = CreateIncomingMessage(NetIncomingMessageType.Data, payloadByteLength);
                            msg.m_isFragment          = isFragment;
                            msg.m_receiveTime         = now;
                            msg.m_sequenceNumber      = sequenceNumber;
                            msg.m_receivedMessageType = tp;
                            msg.m_senderConnection    = sender;
                            msg.m_senderEndPoint      = ipsender;
                            msg.m_bitLength           = payloadBitLength;

                            Buffer.BlockCopy(m_receiveBuffer, ptr, msg.m_data, 0, payloadByteLength);
                            if (sender != null)
                            {
                                if (tp == NetMessageType.Unconnected)
                                {
                                    // We're connected; but we can still send unconnected messages to this peer
                                    msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                                    ReleaseMessage(msg);
                                }
                                else
                                {
                                    // connected application (non-library) message
                                    sender.ReceivedMessage(msg);
                                }
                            }
                            else
                            {
                                // at this point we know the message type is enabled
                                // unconnected application (non-library) message
                                msg.m_incomingMessageType = NetIncomingMessageType.UnconnectedData;
                                ReleaseMessage(msg);
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        LogError("Packet parsing error: " + ex.Message + " from " + ipsender);
                    }
                    ptr += payloadByteLength;
                }

                m_statistics.PacketReceived(bytesReceived, numMessages, numFragments);
                if (sender != null)
                {
                    sender.m_statistics.PacketReceived(bytesReceived, numMessages, numFragments);
                }
            } while (m_socket.Available > 0);
        }