internal void Update(int deltaTime) { Interlocked.Add(ref _timeSinceLastPacket, deltaTime); switch (_connectionState) { case ConnectionState.Connected: if (_timeSinceLastPacket > NetManager.DisconnectTimeout) { NetDebug.Write( "[UPDATE] Disconnect by timeout: {0} > {1}", _timeSinceLastPacket, NetManager.DisconnectTimeout); NetManager.DisconnectPeerForce(this, DisconnectReason.Timeout, 0, null); return; } break; case ConnectionState.ShutdownRequested: if (_timeSinceLastPacket > NetManager.DisconnectTimeout) { _connectionState = ConnectionState.Disconnected; } else { _shutdownTimer += deltaTime; if (_shutdownTimer >= ShutdownDelay) { _shutdownTimer = 0; NetManager.SendRaw(_shutdownPacket, EndPoint); } } return; case ConnectionState.Outgoing: _connectTimer += deltaTime; if (_connectTimer > NetManager.ReconnectDelay) { _connectTimer = 0; _connectAttempts++; if (_connectAttempts > NetManager.MaxConnectAttempts) { NetManager.DisconnectPeerForce(this, DisconnectReason.ConnectionFailed, 0, null); return; } //else send connect again NetManager.SendRaw(_connectRequestPacket, EndPoint); } return; case ConnectionState.Disconnected: return; } //Send ping _pingSendTimer += deltaTime; if (_pingSendTimer >= NetManager.PingInterval) { NetDebug.Write("[PP] Send ping..."); //reset timer _pingSendTimer = 0; //send ping _pingPacket.Sequence++; //ping timeout if (_pingTimer.IsRunning) { UpdateRoundTripTime((int)_pingTimer.ElapsedMilliseconds); } _pingTimer.Reset(); _pingTimer.Start(); NetManager.SendRaw(_pingPacket, EndPoint); } //RTT - round trip time _rttResetTimer += deltaTime; if (_rttResetTimer >= NetManager.PingInterval * 3) { _rttResetTimer = 0; _rtt = _avgRtt; _rttCount = 1; } UpdateMtuLogic(deltaTime); //Pending send BaseChannel currentChannel = _headChannel; while (currentChannel != null) { currentChannel.SendNextPackets(); currentChannel = currentChannel.Next; } lock (_unreliableChannel) { while (_unreliableChannel.Count > 0) { NetPacket packet = _unreliableChannel.Dequeue(); SendUserData(packet); NetManager.NetPacketPool.Recycle(packet); } } SendMerged(); }
private void SendInternal( byte[] data, int start, int length, byte channelNumber, DeliveryMethod deliveryMethod, object userData) { if (_connectionState != ConnectionState.Connected || channelNumber >= _channels.Length) { return; } //Select channel PacketProperty property; BaseChannel channel = null; if (deliveryMethod == DeliveryMethod.Unreliable) { property = PacketProperty.Unreliable; } else { property = PacketProperty.Channeled; channel = CreateChannel((byte)(channelNumber * 4 + (byte)deliveryMethod)); } //Prepare NetDebug.Write("[RS]Packet: " + property); //Check fragmentation int headerSize = NetPacket.GetHeaderSize(property); //Save mtu for multithread int mtu = _mtu; if (length + headerSize > mtu) { //if cannot be fragmented if (deliveryMethod != DeliveryMethod.ReliableOrdered && deliveryMethod != DeliveryMethod.ReliableUnordered) { throw new TooBigPacketException("Unreliable packet size exceeded maximum of " + (mtu - headerSize) + " bytes"); } int packetFullSize = mtu - headerSize; int packetDataSize = packetFullSize - NetConstants.FragmentHeaderSize; int totalPackets = length / packetDataSize + (length % packetDataSize == 0 ? 0 : 1); NetDebug.Write("FragmentSend:\n" + " MTU: {0}\n" + " headerSize: {1}\n" + " packetFullSize: {2}\n" + " packetDataSize: {3}\n" + " totalPackets: {4}", mtu, headerSize, packetFullSize, packetDataSize, totalPackets); if (totalPackets > ushort.MaxValue) { throw new TooBigPacketException("Data was split in " + totalPackets + " fragments, which exceeds " + ushort.MaxValue); } ushort currentFramentId; lock (_sendLock) { currentFramentId = _fragmentId; _fragmentId++; } for (ushort partIdx = 0; partIdx < totalPackets; partIdx++) { int sendLength = length > packetDataSize ? packetDataSize : length; NetPacket p = _packetPool.GetPacket(headerSize + sendLength + NetConstants.FragmentHeaderSize); p.Property = property; p.UserData = userData; p.FragmentId = currentFramentId; p.FragmentPart = partIdx; p.FragmentsTotal = (ushort)totalPackets; p.MarkFragmented(); Buffer.BlockCopy(data, partIdx * packetDataSize, p.RawData, NetConstants.FragmentedHeaderTotalSize, sendLength); channel.AddToQueue(p); length -= sendLength; } return; } //Else just send NetPacket packet = _packetPool.GetPacket(headerSize + length); packet.Property = property; Buffer.BlockCopy(data, start, packet.RawData, headerSize, length); packet.UserData = userData; if (channel == null) //unreliable { lock (_unreliableChannel) _unreliableChannel.Enqueue(packet); } else { channel.AddToQueue(packet); } }
//Process incoming packet internal void ProcessPacket(NetPacket packet) { //not initialized if (_connectionState == ConnectionState.Incoming) { _packetPool.Recycle(packet); return; } if (packet.ConnectionNumber != _connectNum && packet.Property != PacketProperty.ShutdownOk) //without connectionNum { NetDebug.Write(NetLogLevel.Trace, "[RR]Old packet"); _packetPool.Recycle(packet); return; } _timeSinceLastPacket = 0; NetDebug.Write("[RR]PacketProperty: {0}", packet.Property); switch (packet.Property) { case PacketProperty.Merged: int pos = NetConstants.HeaderSize; while (pos < packet.Size) { ushort size = BitConverter.ToUInt16(packet.RawData, pos); pos += 2; NetPacket mergedPacket = _packetPool.GetPacket(size, false); if (!mergedPacket.FromBytes(packet.RawData, pos, size)) { _packetPool.Recycle(packet); break; } pos += size; ProcessPacket(mergedPacket); } break; //If we get ping, send pong case PacketProperty.Ping: if (NetUtils.RelativeSequenceNumber(packet.Sequence, _pongPacket.Sequence) > 0) { NetDebug.Write("[PP]Ping receive, send pong"); FastBitConverter.GetBytes(_pongPacket.RawData, 3, DateTime.UtcNow.Ticks); _pongPacket.Sequence = packet.Sequence; _netManager.SendRaw(_pongPacket, _remoteEndPoint); } _packetPool.Recycle(packet); break; //If we get pong, calculate ping time and rtt case PacketProperty.Pong: if (packet.Sequence == _pingPacket.Sequence) { _pingTimer.Stop(); int elapsedMs = (int)_pingTimer.ElapsedMilliseconds; _remoteDelta = BitConverter.ToInt64(packet.RawData, 3) + (elapsedMs * TimeSpan.TicksPerMillisecond) / 2 - DateTime.UtcNow.Ticks; UpdateRoundTripTime(elapsedMs); _netManager.ConnectionLatencyUpdated(this, elapsedMs / 2); NetDebug.Write("[PP]Ping: {0} - {1} - {2}", packet.Sequence, elapsedMs, _remoteDelta); } _packetPool.Recycle(packet); break; case PacketProperty.Ack: if (packet.ChannelId > _channelsTotalCount) { _packetPool.Recycle(packet); break; } BaseChannel channel = _channels[packet.ChannelId]; if (channel != null) { channel.ProcessPacket(packet); } break; case PacketProperty.Channeled: if (packet.ChannelId > _channelsTotalCount) { _packetPool.Recycle(packet); break; } channel = _channels[packet.ChannelId] ?? CreateChannel(packet.ChannelId); channel.ProcessPacket(packet); break; //Simple packet without acks case PacketProperty.Unreliable: AddIncomingPacket(packet); return; case PacketProperty.MtuCheck: case PacketProperty.MtuOk: ProcessMtuPacket(packet); break; case PacketProperty.ShutdownOk: if (_connectionState == ConnectionState.ShutdownRequested) { _connectionState = ConnectionState.Disconnected; } _packetPool.Recycle(packet); break; default: NetDebug.WriteError("Error! Unexpected packet type: " + packet.Property); break; } }