Renci.SshNet.ForwardedPortDynamic.HandleSocks4 C# (CSharp) Method

        private bool HandleSocks4(Socket socket, IChannelDirectTcpip channel, TimeSpan timeout)
        {
            var commandCode = SocketAbstraction.ReadByte(socket, timeout);
            if (commandCode == -1)
            {
                // SOCKS client closed connection
                return false;
            }

            //  TODO:   See what need to be done depends on the code

            var portBuffer = new byte[2];
            if (SocketAbstraction.Read(socket, portBuffer, 0, portBuffer.Length, timeout) == 0)
            {
                // SOCKS client closed connection
                return false;
            }

            var port = (uint)(portBuffer[0] * 256 + portBuffer[1]);

            var ipBuffer = new byte[4];
            if (SocketAbstraction.Read(socket, ipBuffer, 0, ipBuffer.Length, timeout) == 0)
            {
                // SOCKS client closed connection
                return false;
            }

            var ipAddress = new IPAddress(ipBuffer);

            var username = ReadString(socket, timeout);
            if (username == null)
            {
                // SOCKS client closed connection
                return false;
            }

            var host = ipAddress.ToString();

            RaiseRequestReceived(host, port);

            channel.Open(host, port, this, socket);

            SocketAbstraction.SendByte(socket, 0x00);

            if (channel.IsOpen)
            {
                SocketAbstraction.SendByte(socket, 0x5a);
                SocketAbstraction.Send(socket, portBuffer, 0, portBuffer.Length);
                SocketAbstraction.Send(socket, ipBuffer, 0, ipBuffer.Length);
                return true;
            }

            // signal that request was rejected or failed
            SocketAbstraction.SendByte(socket, 0x5b);
            return false;
        }