public void StartConnect(ref SelectControl control, Buf safeBuffer) { if (accessorSocket != null) { throw new InvalidOperationException("CodeBug: StartConnect called but socket is not null"); } accessorSocket = new Socket(accessorHost.GetAddressFamilyForTcp(), SocketType.Stream, ProtocolType.Tcp); accessorSocket.Blocking = false; if (accessorHost.proxy != null) { throw new NotImplementedException("accessor host through proxy not implemented"); } accessorHost.targetEndPoint.ForceIPResolution(DnsPriority.IPv4ThenIPv6); connectAsyncArgs.RemoteEndPoint = accessorHost.targetEndPoint.ipEndPoint; Console.WriteLine("{0} Connecting to {1}:{2}", DateTime.Now, accessorHost.targetEndPoint.ipOrHost, accessorHost.targetEndPoint.port); if (accessorSocket.ConnectAsync(connectAsyncArgs)) { control.AddConnectSocket(accessorSocket, ConnectHandler); } else { throw new NotImplementedException("immediate connect not implemented"); } }
void GotHeaders(ref SelectControl selectControl, Socket clientSocket, Byte[] headers, UInt32 totalLength) { String serverIPOrHost = null; UInt16 serverPort = 0; try { serverIPOrHost = GetServerFromHeaders(out serverPort, out isConnect, headers, ref headersLength, ref totalLength, clientLogString); } catch (Exception e) { if (AppLayerProxy.ErrorLogger != null) { AppLayerProxy.ErrorLogger.WriteLine("{0} Failed to get server from HTTP Headers: {1}", clientLogString, e); } } if (serverIPOrHost == null) { selectControl.ShutdownDisposeAndRemoveReceiveSocket(clientSocket); return; } this.serverLogString = serverIPOrHost + ":" + serverPort.ToString(); Boolean needToConnect; if (AppLayerProxy.ForwardProxy == null) { // TODO: Fix so this does not block during DNS resolution IPAddress serverIP; try { serverIP = EndPoints.ParseIPOrResolveHost(serverIPOrHost, DnsPriority.IPv4ThenIPv6); } catch (SocketException) { if (AppLayerProxy.ErrorLogger != null) { AppLayerProxy.ErrorLogger.WriteLine("{0} Failed to resolve server hostname '{1}'", clientLogString, serverIPOrHost); } selectControl.ShutdownDisposeAndRemoveReceiveSocket(clientSocket); return; } IPEndPoint serverEndPoint = new IPEndPoint(serverIP, serverPort); serverSocket = new Socket(serverEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp); serverSocket.Blocking = false; needToConnect = NonBlockingSocket.ConnectNonBlocking(serverSocket, serverEndPoint); } else { this.serverEndPointForProxy = new StringEndPoint(serverIPOrHost, serverPort); Console.WriteLine("[DEBUG] Connecting to proxy '{0}'", AppLayerProxy.ForwardProxy.host.CreateTargetString()); serverSocket = new Socket(AppLayerProxy.ForwardProxy.host.GetAddressFamilyForTcp(), SocketType.Stream, ProtocolType.Tcp); serverSocket.Blocking = false; throw new NotImplementedException(); //needToConnect = NonBlockingSocket.ConnectNonBlocking(serverSocket, AppLayerProxy.ForwardProxy.endPoint); } //Console.WriteLine("[DEBUG] {0} > {1} Connecting...", clientLogString, serverLogString); if (needToConnect) { selectControl.RemoveReceiveSocket(clientSocket); // Remove the clientSocket from the read list // until the connection gets established or lost selectControl.AddConnectSocket(serverSocket, ServerSocketConnected); // Save Data if (isConnect) { if (totalLength == headersLength) { clientBuffer = null; // Clean up the client buffer (if there is one) } } else { if (clientBuffer == null) { clientBuffer = new ByteBuilder(totalLength); Array.Copy(headers, clientBuffer.bytes, totalLength); clientBuffer.contentLength = totalLength; } else { // Data already in the client buffer } } } else { if (AppLayerProxy.Logger != null) { AppLayerProxy.Logger.WriteLine("{0} > {1} Connection Completed Synchronously (CornerCase)", clientLogString, serverLogString); } if (!clientSocket.Connected) { selectControl.DisposeAndRemoveReceiveSocket(clientSocket); if (serverSocket.Connected) { if (AppLayerProxy.Logger != null) { AppLayerProxy.Logger.WriteLine("{0} > {1} Server Connected but Client Disconnected...Closing Server", clientLogString, serverLogString); } try { serverSocket.Shutdown(SocketShutdown.Both); } catch (Exception) { } } else { if (AppLayerProxy.Logger != null) { AppLayerProxy.Logger.WriteLine("{0} > {1} Client disconnected before server could connect", clientLogString, serverLogString); } } serverSocket.Close(); } else if (!serverSocket.Connected) { if (AppLayerProxy.Logger != null) { AppLayerProxy.Logger.WriteLine("{0} > {1} Failed to connect to server..Closing Client", clientLogString, serverLogString); } selectControl.ShutdownDisposeAndRemoveReceiveSocket(clientSocket); serverSocket.Close(); } else { if (AppLayerProxy.Logger != null) { AppLayerProxy.Logger.WriteLine("{0} > {1} Connected to Server", clientLogString, serverLogString); } if (isConnect) { uint extraChars = totalLength - headersLength; FinishConnection(headers, headersLength, extraChars); } else { FinishConnection(headers, 0, totalLength); } TcpBridge bridge = new TcpBridge(clientLogString, clientSocket, serverLogString, serverSocket); selectControl.UpdateHandler(clientSocket, bridge.ReceiveHandler); selectControl.AddReceiveSocket(serverSocket, bridge.ReceiveHandler); } } }