private void SendInternal( byte[] data, int start, int length, byte channelNumber, DeliveryMethod deliveryMethod, object userData) { if (_connectionState == ConnectionState.ShutdownRequested || _connectionState == ConnectionState.Disconnected) { return; } if (channelNumber >= _channels.Length) { return; } //Select channel PacketProperty property; BaseChannel channel; if (deliveryMethod == DeliveryMethod.Unreliable) { property = PacketProperty.Unreliable; channel = _unreliableChannel; } 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); } lock (_sendLock) { 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 = _fragmentId; p.FragmentPart = partIdx; p.FragmentsTotal = (ushort)totalPackets; p.MarkFragmented(); Buffer.BlockCopy(data, partIdx * packetDataSize, p.RawData, NetConstants.FragmentTotalSize, sendLength); channel.AddToQueue(p); length -= sendLength; } _fragmentId++; } return; } //Else just send NetPacket packet = _packetPool.GetPacket(headerSize + length); packet.Property = property; Buffer.BlockCopy(data, start, packet.RawData, headerSize, length); packet.UserData = userData; channel.AddToQueue(packet); }
internal void AddIncomingPacket(NetPacket p) { if (p.IsFragmented) { NetDebug.Write("Fragment. Id: {0}, Part: {1}, Total: {2}", p.FragmentId, p.FragmentPart, p.FragmentsTotal); //Get needed array from dictionary ushort packetFragId = p.FragmentId; IncomingFragments incomingFragments; if (!_holdedFragments.TryGetValue(packetFragId, out incomingFragments)) { incomingFragments = new IncomingFragments { Fragments = new NetPacket[p.FragmentsTotal], ChannelId = p.ChannelId }; _holdedFragments.Add(packetFragId, incomingFragments); } //Cache var fragments = incomingFragments.Fragments; //Error check if (p.FragmentPart >= fragments.Length || fragments[p.FragmentPart] != null || p.ChannelId != incomingFragments.ChannelId) { _packetPool.Recycle(p); NetDebug.WriteError("Invalid fragment packet"); return; } //Fill array fragments[p.FragmentPart] = p; //Increase received fragments count incomingFragments.ReceivedCount++; //Increase total size incomingFragments.TotalSize += p.Size - NetConstants.FragmentTotalSize; //Check for finish if (incomingFragments.ReceivedCount != fragments.Length) { return; } int resultingPacketHeaderSize = NetPacket.GetHeaderSize(p.Property); NetPacket resultingPacket = _packetPool.GetPacket(resultingPacketHeaderSize + incomingFragments.TotalSize); resultingPacket.Property = p.Property; resultingPacket.ChannelId = incomingFragments.ChannelId; int firstFragmentSize = fragments[0].Size - NetConstants.FragmentTotalSize; for (int i = 0; i < incomingFragments.ReceivedCount; i++) { //Create resulting big packet int fragmentSize = fragments[i].Size - NetConstants.FragmentTotalSize; Buffer.BlockCopy( fragments[i].RawData, NetConstants.FragmentTotalSize, resultingPacket.RawData, resultingPacketHeaderSize + firstFragmentSize * i, fragmentSize); //Free memory _packetPool.Recycle(fragments[i]); fragments[i] = null; } //Send to process NetManager.ReceiveFromPeer(resultingPacket, this); //Clear memory _holdedFragments.Remove(packetFragId); } else //Just simple packet { NetManager.ReceiveFromPeer(p, this); } }
/// <summary> /// Gets maximum size of packet that will be not fragmented. /// </summary> /// <param name="options">Type of packet that you want send</param> /// <returns>size in bytes</returns> public int GetMaxSinglePacketSize(DeliveryMethod options) { return(_mtu - NetPacket.GetHeaderSize(options == DeliveryMethod.Unreliable ? PacketProperty.Unreliable : PacketProperty.Channeled)); }