Ejemplo n.º 1
0
        public void HandleCommandResponse(ReverseProxyConnectResponse response)
        {
            //a small prevention for calling this method twice, not required... just incase
            if (!_receivedConnResponse)
            {
                _receivedConnResponse = true;

                if (response.IsConnected)
                {
                    this.HostName = response.HostName;

                    //tell the Proxy Client that we've established a connection
                    if (Type == ProxyType.HTTPS)
                    {
                        SendToClient(Encoding.ASCII.GetBytes("HTTP/1.0 200 Connection established\r\n\r\n"));
                    }
                    else if (Type == ProxyType.SOCKS5)
                    {
                        //Thanks to http://www.mentalis.org/soft/projects/proxy/ for the Maths
                        try
                        {
                            List<byte> responsePacket = new List<byte>();
                            responsePacket.Add(SOCKS5_VERSION_NUMBER);
                            responsePacket.Add(SOCKS5_CMD_REPLY_SUCCEEDED);
                            responsePacket.Add(SOCKS5_RESERVED);
                            responsePacket.Add(1);
                            responsePacket.AddRange(response.LocalAddress.GetAddressBytes());
                            responsePacket.Add((byte)(Math.Floor((decimal)response.LocalPort / 256)));
                            responsePacket.Add((byte)(response.LocalPort % 256));

                            SendToClient(responsePacket.ToArray());
                        }
                        catch
                        {
                            //just incase the math failed
                            //it will still show it's succesful
                            SendToClient(new byte[]
                            {
                                SOCKS5_VERSION_NUMBER,
                                SOCKS5_CMD_REPLY_SUCCEEDED,
                                SOCKS5_RESERVED,
                                1, //static: it's always 1
                                0, 0, 0, 0, //bind ip
                                0, 0 //bind port
                            });
                        }
                    }

                    _handshakeStream.Close();

                    ProxySuccessful = true;

                    try
                    {
                        //start receiving data from the proxy
                        Handle.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, AsyncReceiveProxy, null);
                    }
                    catch
                    {
                        Disconnect();
                    }
                }
                else
                {
                    if (Type == ProxyType.HTTPS)
                    {
                        Disconnect();
                    }
                    else if (Type == ProxyType.SOCKS5)
                    {
                        //send a connection fail packet
                        SendToClient(new byte[]
                        {
                            SOCKS5_VERSION_NUMBER,
                            SOCKS5_CMD_REPLY_CONNECTION_REFUSED,
                            SOCKS5_RESERVED,
                            1, //static: it's always 1
                            0, 0, 0, 0, //Bind Address
                            0, 0 //Bind Port
                        });
                    }
                }

                Server.CallonUpdateConnection(this);
            }
        }