public bool Send(SendMethod method) { if (msg == null) { msg = new NetworkMessage(Client, 4048); } switch (method) { case SendMethod.Proxy: lock (msgLock) { msg.Reset(); ToNetworkMessage(msg); if (msg.Length > 8) { msg.InsetLogicalPacketHeader(); msg.PrepareToSend(); if (Destination == PacketDestination.Client) { Client.IO.Proxy.SendToClient(msg.Data); } else if (Destination == PacketDestination.Server) { Client.IO.Proxy.SendToServer(msg.Data); } return(true); } } break; case SendMethod.HookProxy: lock (msgLock) { msg.Reset(); ToNetworkMessage(msg); if (msg.Length > 8) { msg.InsetLogicalPacketHeader(); msg.PrepareToSend(); Pipes.HookSendToServerPacket.Send(Client, msg.Data); return(true); } } break; case SendMethod.Memory: lock (msgLock) { msg.Reset(); ToNetworkMessage(msg); if (Destination == PacketDestination.Server) { if (msg.Length > 8) { msg.InsetLogicalPacketHeader(); msg.PrepareToSend(); return(SendPacketToServerByMemory(Client, msg.Data)); } } else if (Destination == PacketDestination.Client) { byte[] data = new byte[msg.Data.Length - 8]; Array.Copy(msg.Data, 8, data, 0, data.Length); SendPacketToClientByMemory(Client, data); } } break; } return(false); }
public bool ParseServerPacket(Client client, byte[] packet) { NetworkMessage inMsg = new NetworkMessage(client, packet); NetworkMessage outMsg = new NetworkMessage(client); while (inMsg.Position < packet.Length) { if (!ParsePacketFromServer(client, inMsg, outMsg)) return false; outMsg.Reset(); } return true; }
private void ServerReadCallBack(IAsyncResult ar) { byte[] serverData = null; try { int read = serverStream.EndRead(ar); if (read < 2) { Restart(); return; } lastInteraction = DateTime.Now; int pSize = (int)BitConverter.ToUInt16(serverRecvMsg.GetBuffer(), 0) + 2; while (read < pSize) { if (serverStream.CanRead) { read += serverStream.Read(serverRecvMsg.GetBuffer(), read, pSize - read); } else { throw new Exception("Connection broken."); } } serverRecvMsg.Length = pSize; switch (protocol) { case Protocol.Login: ParseCharacterList(); break; case Protocol.World: OnReceivedDataFromServer(serverRecvMsg.Data); serverData = serverRecvMsg.Data; if (serverRecvMsg.CheckAdler32() && serverRecvMsg.XteaDecrypt(xteaKey)) { serverRecvMsg.Position = serverRecvMsg.GetPacketHeaderSize(); int msgSize = (int)serverRecvMsg.GetUInt16() + serverRecvMsg.GetPacketHeaderSize() + 2; clientSendMsg.Reset(); while (serverRecvMsg.Position < msgSize) { int position = serverRecvMsg.Position; byte type = serverRecvMsg.PeekByte(); lastReceivedPacketTypes.Push(type); if (!ParsePacketFromServer(client, serverRecvMsg, clientSendMsg)) { byte[] unknown = serverRecvMsg.GetBytes(serverRecvMsg.Length - serverRecvMsg.Position); OnSplitPacketFromServer(unknown[0], unknown); WriteDebug("Unknown incoming packet, type: " + type.ToString("X") + ", data: " + unknown.ToHexString()); clientSendMsg.AddBytes(unknown); break; } byte[] data = new byte[serverRecvMsg.Position - position]; Array.Copy(serverRecvMsg.GetBuffer(), position, data, 0, data.Length); OnSplitPacketFromServer(data[0], data); } if (AllowIncomingModification && clientSendMsg.Length > clientSendMsg.GetPacketHeaderSize() + 2) { clientSendMsg.InsetLogicalPacketHeader(); clientSendMsg.PrepareToSend(xteaKey); SendToClient(clientSendMsg.Data); } else { SendToClient(serverData); } } else { SendToClient(serverData); } serverStream.BeginRead(serverRecvMsg.GetBuffer(), 0, 2, new AsyncCallback(ServerReadCallBack), null); break; case Protocol.None: SendToClient(serverRecvMsg.Data); break; } } catch (System.IO.IOException) { } catch (ObjectDisposedException) { } catch (Exception ex) { WriteDebug(ex.ToString()); if (serverData != null) { SendToClient(serverData); serverStream.BeginRead(serverRecvMsg.GetBuffer(), 0, 2, new AsyncCallback(ServerReadCallBack), null); } //Restart(); } }
public void ProcessFromServer(byte[] buffer) { int length = (int)BitConverter.ToUInt16(buffer, 0) + 2; if (length > buffer.Length) { // Packet is split into multiple chunks if (partialPacketSize == 0) { // This is the first chunk fullPacketSize = length; Array.Copy(buffer, serverRecvMsg.GetBuffer(), buffer.Length); partialPacketSize = buffer.Length; return; } else { // This is a subsequent chunk Array.Copy(buffer, 0, serverRecvMsg.GetBuffer(), partialPacketSize, buffer.Length); partialPacketSize += buffer.Length; if (partialPacketSize < fullPacketSize) { // Packet is still incomplete return; } else { // Packet is complete serverRecvMsg.Length = fullPacketSize; } } } else { fullPacketSize = 0; partialPacketSize = 0; Array.Copy(buffer, serverRecvMsg.GetBuffer(), length); serverRecvMsg.Length = length; } OnReceivedDataFromServer(serverRecvMsg.Data); switch (protocol) { case Protocol.Login: break; case Protocol.World: bool adlerOkay = serverRecvMsg.CheckAdler32(); bool decryptOkay = serverRecvMsg.XteaDecrypt(client.IO.XteaKey); if (adlerOkay && decryptOkay) { serverRecvMsg.Position = 6; int msgSize = (int)serverRecvMsg.GetUInt16() + 8; clientSendMsg.Reset(); while (serverRecvMsg.Position < msgSize) { int position = serverRecvMsg.Position; bool parsed = false; try { parsed = ParsePacketFromServer(client, serverRecvMsg, clientSendMsg); } catch (Exception ex) { WriteDebug(ex.Message + "\nStackTrace: " + ex.StackTrace); } if (!parsed) { if (serverRecvMsg.Length - serverRecvMsg.Position > 0 && serverRecvMsg.Length < serverRecvMsg.GetBuffer().Length) { byte[] unknown = serverRecvMsg.GetBytes(serverRecvMsg.Length - serverRecvMsg.Position); OnSplitPacketFromServer(unknown[0], unknown); } break; } if (serverRecvMsg.Position - position > 0) { byte[] data = new byte[serverRecvMsg.Position - position]; Array.Copy(serverRecvMsg.GetBuffer(), position, data, 0, data.Length); OnSplitPacketFromServer(data[0], data); } } } break; case Protocol.None: break; } }