BytesRoad.Net.Sockets.Socket_Socks4.VerifyResponse C# (CSharp) Метод

        void VerifyResponse()
        {
            string msg = null;

            //------------------------------------
            // Verify reply format. Pass 4 even it
            // against the RFC.
            //
            if((_response[0] != 0) && (_response[0] != 4))
            {
                msg = string.Format("Socks4: Reply format is unknown ({0}).", _response[0]);
                throw new ProtocolViolationException(msg);
            }

            //------------------------------------
            // Verify the response
            //
            if(_response[1] != 90)
            {
                byte err = _response[1];
                if(91 == err)
                    msg = string.Format("Socks4: Request rejected or failed ({0}).", err);
                else if(92 == err)
                    msg = string.Format("Socks4: Request rejected because SOCKS server cannot connect to identd on the client ({0}).", err);
                else if(93 == err)
                    msg = string.Format("Socks4: Request rejected because the client program and identd report different user-ids ({0}).", err);
                else
                    msg = string.Format("Socks4: Socks server return unknown error code ({0}).", err);
            }

            if(null != msg)
                throw new SocketException(SockErrors.WSAECONNREFUSED);

                // throw new ProxyErrorException(msg);
        }