public void HandleConnectionRequest(Connection acceptedConnection)
{
Connection remoteSocksServerConnection = null;
try
{
remoteSocksServerConnection = Connection.ConnectOverHttpProxy(_RemoteSocksServerHost, _RemoteSocksServerPort);
}
catch
{
acceptedConnection.Close();
return;
}
remoteSocksServerConnection.SetObserver(this);
remoteSocksServerConnection.Send(Socks4Request.Build(Socks4Request.REQUEST_TYPE_CONNECT, _RedirectHost, _RedirectPort, "").ToByteArray());
_WaitHandle.WaitOne();
if (_RemoteSocksServerResponse == null || !_RemoteSocksServerResponse.Success)
{
SocksCommon.SendSocksError(acceptedConnection);
return;
}
SocksCommon.SendSocksSuccess(acceptedConnection, _RemoteSocksServerResponse.Port, IPAddress.Parse(_RemoteSocksServerResponse.ResolvedIP));
acceptedConnection.SetObserver(new TransmissionRedirectConnectionObserver(remoteSocksServerConnection, true));
remoteSocksServerConnection.SetObserver(new TransmissionRedirectConnectionObserver(acceptedConnection, false));
acceptedConnection.BeginReceiving();
}
public override void HandleReceive(byte[] receiveBuffer, int offset, int count)
{
byte[] requestASCII = new byte[count];
Array.ConstrainedCopy(receiveBuffer, offset, requestASCII, 0, count);
Console.WriteLine("Socks request received: {0}\r\n{1}", Encoding.ASCII.GetString(requestASCII), Log.ByteArrayToHexString(requestASCII));
Socks4Request request = Socks4Request.Parse(receiveBuffer);
if (request == null)
{
Console.WriteLine("Could not parse socks request");
SocksCommon.SendSocksError(_Client);
return;
}
Connection requestedConnection = null;
try
{
requestedConnection = Connection.Connect(request.RemoteHostIP, request.RemotePort);
Console.WriteLine("{0} --> Socks Request successful, connected to {1}:{2}", _Client, request.RemoteHostIP, request.RemotePort);
}
catch
{
SocksCommon.SendSocksError(_Client);
return;
}
requestedConnection.SetObserver(new TransmissionRedirectConnectionObserver(_Client, false));
_Client.SetObserver(new TransmissionRedirectConnectionObserver(requestedConnection, true));
// _Client will continue to receive, but destination needs to start receiveing.
requestedConnection.BeginReceiving();
SocksCommon.SendSocksSuccess(_Client, request.RemotePort, request.RemoteHostIP);
}