Exemplo n.º 1
0
        void Bind_Write_End(IAsyncResult ar)
        {
            Bind_SO stateObj = (Bind_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                NStream.EndWrite(ar);

                //------------------------------------
                // Read the response from proxy server.
                //
                NStream.BeginRead(
                    _response,
                    0,
                    8,
                    new AsyncCallback(Bind_Read_End),
                    stateObj);
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 2
0
        void Connect_Read_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                int num = NStream.EndRead(ar);
                stateObj.ReadBytes += num;

                if (stateObj.ReadBytes < 8)
                {
                    //------------------------------------
                    // Read the response from proxy server.
                    //
                    NStream.BeginRead(_response,
                                      stateObj.ReadBytes,
                                      8 - stateObj.ReadBytes,
                                      new AsyncCallback(Connect_Read_End),
                                      stateObj);
                }
                else
                {
                    VerifyResponse();
                    stateObj.SetCompleted();
                }
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 3
0
        void Connect_Connect_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                _socket.EndConnect(ar);

                _localEndPoint  = null;
                _remoteEndPoint = stateObj.RemoteEndPoint;

                //------------------------------------
                // Send CONNECT command
                //
                byte[] cmd = PrepareConnectCmd(stateObj.RemoteEndPoint);

                NStream.BeginWrite(cmd,
                                   0,
                                   cmd.Length,
                                   new AsyncCallback(Connect_Write_End),
                                   stateObj);
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 4
0
        void Bind_Connect_End(IAsyncResult ar)
        {
            Bind_SO stateObj = (Bind_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                _socket.EndConnect(ar);

                //------------------------------------
                // Send CONNECT command
                //
                byte[] cmd = PrepareBindCmd(stateObj.BaseSocket);

                NStream.BeginWrite(cmd,
                                   0,
                                   cmd.Length,
                                   new AsyncCallback(Bind_Write_End),
                                   stateObj);
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 5
0
        void Bind_Read_End(IAsyncResult ar)
        {
            Bind_SO stateObj = (Bind_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                int num = NStream.EndRead(ar);
                stateObj.ReadBytes += num;

                if (stateObj.ReadBytes < 8)
                {
                    //------------------------------------
                    // Read the response from proxy server.
                    //
                    NStream.BeginRead(_response,
                                      stateObj.ReadBytes,
                                      8 - stateObj.ReadBytes,
                                      new AsyncCallback(Bind_Read_End),
                                      stateObj);
                }
                else
                {
                    VerifyResponse();
                    _localEndPoint  = ConstructBindEndPoint(stateObj.ProxyIP);
                    _remoteEndPoint = null;
                    stateObj.SetCompleted();
                }
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
        void Connect_Connect_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                _socket.EndConnect(ar);

                //------------------------------------------
                // Send CONNECT command
                byte[] cmd = GetConnectCmd(stateObj.HostName,
                                           stateObj.HostPort,
                                           stateObj.UseCredentials);

                NStream.BeginWrite(cmd, 0, cmd.Length,
                                   new AsyncCallback(Connect_Write_End),
                                   stateObj);
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 7
0
        override internal IAsyncResult BeginAccept(AsyncCallback callback,
                                                   object state)
        {
            CheckDisposed();

            Accept_SO stateObj = null;

            SetProgress(true);
            try
            {
                stateObj = new Accept_SO(callback, state);

                //------------------------------------
                // Read the second response from proxy server.
                //
                NStream.BeginRead(_response,
                                  0,
                                  8,
                                  new AsyncCallback(Accept_Read_End),
                                  stateObj);
            }
            catch
            {
                SetProgress(false);
                throw;
            }
            return(stateObj);
        }
Exemplo n.º 8
0
        void Connect_ReadReply_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                ByteVector reply = EndReadReply(ar);

                //------------------------------------------
                // Analyze reply
                string reason = null;
                int    code   = AnalyzeReply(reply, out reason);

                //------------------------------------------
                // is good return code?
                if (code >= 200 && code <= 299)
                {
                    stateObj.SetCompleted();
                }
                else if ((407 == code) &&
                         !(stateObj.UseCredentials) &&
                         (_proxyUser != null))
                {
                    //------------------------------------------
                    // If Proxy Authentication Required
                    // but we do not issued it, then try again

                    stateObj.UseCredentials = true;

                    //------------------------------------------
                    // Send CONNECT command
                    byte[] cmd = GetConnectCmd(
                        stateObj.HostName,
                        stateObj.HostPort,
                        stateObj.UseCredentials);

                    NStream.BeginWrite(cmd, 0, cmd.Length,
                                       new AsyncCallback(Connect_Write_End),
                                       stateObj);
                }
                else
                {
                    // string msg = string.Format("Connection refused by web proxy: {0} ({1}).", reason, code);
                    // throw new ProxyErrorException(msg);
                    throw new SocketException(SockErrors.WSAECONNREFUSED);
                }
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 9
0
        //private string GetMessage()
        //{
        //	var data = new byte[64];
        //	var builder = new StringBuilder();
        //	var bytes = 0;

        //	do
        //	{
        //		bytes = NStream.Read(data, 0, data.Length);
        //		builder.Append(Encoding.Unicode.GetString(data, 0, bytes));
        //	}
        //	while (NStream.DataAvailable);

        //	return builder.ToString();
        //}

        public void Close()
        {
            if (NStream != null)
            {
                NStream.Close();
            }
            if (tcpClient != null)
            {
                tcpClient.Close();
            }
        }
Exemplo n.º 10
0
        override public void Bind(SocketBase socket)
        {
            CheckDisposed();
            SetProgress(true);
            try
            {
                //-----------------------------------------
                // Get end point for the proxy server
                //
                IPHostEntry host = GetHostByName(_proxyServer);
                if (host == null)
                {
                    throw new SocketException(SockErrors.WSAHOST_NOT_FOUND);
                }

                // throw new HostNotFoundException("Unable to resolve proxy host name.");

                IPEndPoint proxyEndPoint = ConstructEndPoint(host, _proxyPort);

                //-----------------------------------------
                // Connect to proxy server
                //
                _socket.Connect(proxyEndPoint);

                //-----------------------------------------
                // Send BIND command
                //
                byte[] cmd = PrepareBindCmd((Socket_Socks4a)socket);
                NStream.Write(cmd, 0, cmd.Length);

                //-----------------------------------------
                // Read the response from the proxy server.
                //
                int read = 0;
                while (read < 8)
                {
                    read += NStream.Read(
                        _response,
                        read,
                        _response.Length - read);
                }

                VerifyResponse();
                _localEndPoint = ConstructBindEndPoint(proxyEndPoint.Address);

                // remote end point doesn't provided for BIND command
                _remoteEndPoint = null;
            }
            finally
            {
                SetProgress(false);
            }
        }
Exemplo n.º 11
0
        override internal void Connect(EndPoint remoteEP)
        {
            CheckDisposed();
            SetProgress(true);
            try
            {
                //------------------------------------
                // Get end point for the proxy server
                //
                IPHostEntry proxyEntry = GetHostByName(_proxyServer);
                if (null == proxyEntry)
                {
                    // throw new HostNotFoundException("Unable to resolve proxy name.");
                    throw new SocketException(SockErrors.WSAHOST_NOT_FOUND);
                }

                IPEndPoint proxyEndPoint = ConstructEndPoint(proxyEntry, _proxyPort);

                //------------------------------------------
                // Connect to proxy server
                //
                _socket.Connect(proxyEndPoint);

                _localEndPoint  = null; // CONNECT command doesn't provide us with local end point
                _remoteEndPoint = remoteEP;

                //------------------------------------------
                // Send CONNECT command
                //
                byte[] cmd = PrepareConnectCmd(remoteEP);
                NStream.Write(cmd, 0, cmd.Length);

                //------------------------------------------
                // Read the response from proxy the server.
                //
                int read = 0;
                while (read < 8)
                {
                    read += NStream.Read(
                        _response,
                        read,
                        _response.Length - read);
                }

                VerifyResponse();
            }
            finally
            {
                SetProgress(false);
            }
        }
Exemplo n.º 12
0
            public async Task <int> WaitForConnect()
            {
                m_tListener.Start();

                Console.WriteLine("Waiting For Connect.");
                m_tClient = await m_tListener.AcceptTcpClientAsync();

                Console.WriteLine("Connected.");
                NetworkStream ns = m_tClient.GetStream();

                stream    = new NStream(ref ns);
                fileTrans = new FileTrans(ref m_tClient, ref ns);
                return(0);
            }
Exemplo n.º 13
0
        void Connect_Read_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                int num = NStream.EndRead(ar);
                stateObj.ReadBytes += num;

                if (stateObj.ReadBytes < 8)
                {
                    //------------------------------------
                    // Read the response from proxy server.
                    //
                    NStream.BeginRead(
                        _response,
                        stateObj.ReadBytes,
                        8 - stateObj.ReadBytes,
                        new AsyncCallback(Connect_Read_End),
                        stateObj);
                }
                else
                {
                    VerifyResponse();

                    //---------------------------------------
                    // I we unable to resolve remote host then
                    // store information - it will required
                    // later for BIND command.
                    if (null == stateObj.RemoteEndPoint)
                    {
                        _remotePort = stateObj.HostPort;
                        _remoteHost = stateObj.HostName;
                    }

                    stateObj.SetCompleted();
                }
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 14
0
        void Connect_Write_End(IAsyncResult ar)
        {
            Connect_SO stateObj = (Connect_SO)ar.AsyncState;

            try
            {
                stateObj.UpdateContext();
                NStream.EndWrite(ar);

                //-----------------------------------------
                // Read the reply
                BeginReadReply(new AsyncCallback(Connect_ReadReply_End), stateObj);
            }
            catch (Exception e)
            {
                stateObj.Exception = e;
                stateObj.SetCompleted();
            }
        }
Exemplo n.º 15
0
        private async Task <int> SendFiles(string path)
        {
            List <FileInfo> files  = stLib_CS.File.FileHelper.GetFiles(path);
            int             i      = 0;
            NStream         stream = m_Client.stream;

            if (!CurrentPingStatus())
            {
                m_sleeptime = 0;
            }
            await stream.WriteInt32(files.Count);

            await stream.WriteString(GetCurrentHandIn().Path + path.Substring(path.LastIndexOf('\\')));

            foreach (var file in files)
            {
                if (m_sleeptime == 0)
                {
                    m_sleeptime = file.Length * 1000 / 1024 / 200;
                }
                Sleep();
                FileStream fileStream;
                try {
                    fileStream = file.OpenRead();
                } catch (Exception e) {
                    MessageBox.Show("无法打开指定的文件");
                    return(0);
                }
                await stream.WriteInt64(file.Length);

                await stream.WriteString(file.Name);

                int res = await stream.WriteBigFrom(fileStream);

                i++;
                this.Text = "正在发送第" + i.ToString() + "个文件";
            }
            MessageBox.Show("传输成功");
            RefreshText();
            return(0);
        }
Exemplo n.º 16
0
        static async void DownloadFiles()
        {
            m_server = new Server("127.0.0.1", Convert.ToInt32(m_port));
            await m_server.WaitForConnect();

            await m_server.fileTrans.SendFiles(HHI_Module.m_dataPath);

            Console.WriteLine("data files sent.");

            NStream stream = m_server.stream;

            Int32 nfileCount = await stream.ReadInt32();

            m_path = await stream.ReadString();

            if (false == System.IO.Directory.Exists(m_path))
            {
                //创建pic文件夹
                System.IO.Directory.CreateDirectory(m_path);
            }
            System.Console.WriteLine("Client:" + "" + " Start uploading.");
            System.Console.WriteLine("[File Count]:" + nfileCount.ToString());

            for (int i = 0; i < nfileCount; i++)
            {
                System.Console.WriteLine("\t[File Index]:" + i.ToString());
                // 获得文件信息
                long fileLength = await stream.ReadInt64();

                string fileName = await stream.ReadString();

                System.Console.WriteLine("\t\t[File Name]:" + fileName);
                System.Console.WriteLine("\t\t[File Length]:" + fileLength.ToString());

                FileStream fileStream = File.Open(m_path + "/" + fileName, FileMode.Create);

                await stream.ReadBigTo(fileStream, fileLength);

                System.Console.WriteLine("\t[File]:" + fileName + "Received.\n");
            }
        }
Exemplo n.º 17
0
            public async Task <int> Connect()
            {
                IPAddress ipAddress;

                if (!System.Net.IPAddress.TryParse(IPAddress, out ipAddress))
                {
                    return(1);
                }

                m_tClient = new TcpClient();
                try {
                    await m_tClient.ConnectAsync(ipAddress, Convert.ToInt32(Port));
                } catch (Exception e) {
                    return(1);
                }
                NetworkStream ns = m_tClient.GetStream();

                stream    = new NStream(ref ns);
                fileTrans = new FileTrans(ref m_tClient, ref ns);
                return(0);
            }
Exemplo n.º 18
0
        override internal SocketBase Accept()
        {
            CheckDisposed();
            SetProgress(true);
            try
            {
                int read = 0;
                while (read < 8)
                {
                    read += NStream.Read(_response,
                                         read,
                                         _response.Length - read);
                }

                VerifyResponse();
            }
            finally
            {
                SetProgress(false);
            }
            return(this);
        }
Exemplo n.º 19
0
        private async Task <int> SendFile(string path)
        {
            NStream  stream = m_Client.stream;
            FileInfo file   = new FileInfo(path);

            if (!CurrentPingStatus())
            {
                m_sleeptime = 0;
            }
            await stream.WriteInt32(1);

            await stream.WriteString(GetCurrentHandIn().Path);

            if (m_sleeptime == 0)
            {
                m_sleeptime = file.Length * 1000 / 1024 / 200;
            }
            Sleep();

            FileStream fileStream;

            try {
                fileStream = file.OpenRead();
            } catch (Exception e) {
                MessageBox.Show("无法打开指定的文件");
                return(0);
            }
            await stream.WriteInt64(file.Length);

            await stream.WriteString(file.Name);

            int res = await stream.WriteBigFrom(fileStream);

            MessageBox.Show("传输成功");
            RefreshText();
            return(0);
        }
Exemplo n.º 20
0
        override internal void Connect(string hostName, int hostPort)
        {
            CheckDisposed();

            SetProgress(true);
            try
            {
                if (null == hostName)
                {
                    throw new ArgumentNullException("hostName", "The value cannot be null.");
                }

                if (hostPort < IPEndPoint.MinPort || hostPort > IPEndPoint.MaxPort)
                {
                    throw new ArgumentOutOfRangeException("hostPort", "Value, specified for the port is out of the valid range.");
                }

                //------------------------------------
                // Get end point for the proxy server
                IPHostEntry proxyEntry = GetHostByName(_proxyServer);
                if (null == proxyEntry)
                {
                    throw new SocketException(SockErrors.WSAHOST_NOT_FOUND);
                }
                //throw new HostNotFoundException("Unable to resolve proxy name.");

                IPEndPoint proxyEndPoint = ConstructEndPoint(proxyEntry, _proxyPort);

                //------------------------------------------
                // Connect to proxy server
                _socket.Connect(proxyEndPoint);

                bool useCredentials = PreAuthenticate;
                while (true)
                {
                    //------------------------------------------
                    // Send CONNECT command
                    byte[] cmd = GetConnectCmd(hostName, hostPort, useCredentials);
                    NStream.Write(cmd, 0, cmd.Length);

                    //-----------------------------------------
                    // Read the reply
                    ByteVector reply = ReadReply();

                    //------------------------------------------
                    // Analyze reply
                    string reason = null;
                    int    code   = AnalyzeReply(reply, out reason);

                    //------------------------------------------
                    //is good return code?
                    if (code >= 200 && code <= 299)
                    {
                        return;
                    }

                    //------------------------------------------
                    //If Proxy Authentication Required
                    //but we do not issued it, then try again
                    if ((407 == code) &&
                        !useCredentials &&
                        (_proxyUser != null))
                    {
                        useCredentials = true;
                        continue;
                    }

                    //string msg = string.Format("Connection refused by web proxy: {0} ({1}).", reason, code);
                    //throw new ProxyErrorException(msg);
                    throw new SocketException(SockErrors.WSAECONNREFUSED);
                }
            }
            finally
            {
                SetProgress(false);
            }
        }
Exemplo n.º 21
0
        private void ProcessReceiveCompletedHandle()
        {
            WebSocketOpcode opcode;

            while (true)
            {
                var code = PacketData(ref Buffer, ref NStream, out opcode);

                switch (code)
                {
                case ParsePacketInternalCode.HasNextData:
                {
                    continue;
                }

                case ParsePacketInternalCode.NotAllData:
                {
                    return;
                }

                case ParsePacketInternalCode.Success:
                {
                    switch (opcode)
                    {
                    case WebSocketOpcode.Text:
                        break;

                    case WebSocketOpcode.Binary:
                    {
                        var databuffer = NStream?.ToArray();
                        this.webSocketSession?.OnMessageComing(new WebSocketSessionMessageComingArg(databuffer)
                                {
                                    Opcode = opcode,
                                    Count  = databuffer.Length,
                                    Offset = 0
                                });
                        break;
                    }

                    case WebSocketOpcode.Ping:
                    {
                        SendData(WebSocketOpcode.Pong);
                        break;
                    }

                    case WebSocketOpcode.Pong:
                    {
                        continue;
                    }

                    case WebSocketOpcode.Close:
                    {
                        SendData(WebSocketOpcode.Close);
                        this.Dispose();
                        return;
                    }

                    case WebSocketOpcode.Unkonown:
                        break;

                    case WebSocketOpcode.Go:
                        break;

                    default:
                    {
                        SendData(WebSocketOpcode.Close);
                        this.Dispose();
                        return;
                    }
                    }
                    continue;
                }

                default:
                {
                    SendData(WebSocketOpcode.Close);
                    this.Dispose();
                    return;
                }
                }
            }
        }
        public async Task <int> Send(Android.Content.Context context, CoordinatorLayout cl, string workName, string serverName, string folderName, List <string> paths)
        {
            HHI_HandIn     hi         = GetCurrentHandIn(workName);
            HHI_ServerInfo serverInfo = GetCurrentServerInfo(serverName);

            if (client == null)
            {
                client = new stLib_CS.Net.Client(serverInfo.IP, serverInfo.Port);
            }
            else
            {
                if (client.Connected())
                {
                    if (!client.IsServerDisconnected())
                    {
                        HHI_Android.ShowSimpleAlertView(context, "提示", "上一次传输还未完成,请稍后尝试。");
                        return(-1);
                    }
                }
                client.Disconnect();
                client = new stLib_CS.Net.Client(serverInfo.IP, serverInfo.Port);
            }

            //--- Connect ---
            try {
                if (1 == await client.Connect())
                {
                    HHI_Android.ShowSimpleAlertView(context, "错误", "IP地址不合法");
                }
            } catch (Exception ex) {
                HHI_Android.ShowSimpleAlertView(context, "错误", "连接错误,错误信息:\n" + ex.Message.ToString());
                return(-1);
            }
            // Update state Connected
            Snackbar.Make(cl, "连接成功!", Snackbar.LengthShort).Show();

            // Prepare for zip
            // Create path for tmp
            string targetFolderPath = System.IO.Path.Combine(stLib_CS.Compress.tmppath, folderName);

            if (Directory.Exists(stLib_CS.Compress.tmppath))
            {
                DeleteFolder(stLib_CS.Compress.tmppath);
            }
            Directory.CreateDirectory(stLib_CS.Compress.tmppath);
            if (!Directory.Exists(targetFolderPath))
            {
                Directory.CreateDirectory(targetFolderPath);
            }

            // Update state creating cache
            try {
                foreach (var path in paths)
                {
                    // TODO compress images
                    // Compress and Save
                    BitmapFactory.Options options = new BitmapFactory.Options();
                    options.InJustDecodeBounds = false;
                    options.InSampleSize       = 4;
                    Bitmap bitmap     = BitmapFactory.DecodeFile(path, options);
                    var    fileStream = new FileStream(System.IO.Path.Combine(targetFolderPath, System.IO.Path.GetFileName(path)), FileMode.Create);
                    bitmap.Compress(Bitmap.CompressFormat.Png, 100, fileStream);
                    fileStream.Close();
                    // File.Copy( path, System.IO.Path.Combine( targetFolderPath, fileName ) );
                }
            } catch (Exception ex) {
                client.Disconnect();
                HHI_Android.ShowSimpleAlertView(context, "错误", "临时文件复制错误,错误信息:\n" + ex.Message.ToString());
                return(-1);
            }
            Snackbar.Make(cl, "临时文件创建成功!", Snackbar.LengthShort).Show();
            // Compress Zip File
            if (!Compress.DoZipFile(Compress.tmpname, targetFolderPath))
            {
                client.Disconnect();
                HHI_Android.ShowSimpleAlertView(context, "错误", "打包临时文件时出现错误");
                return(-1);
            }
            Snackbar.Make(cl, "缓存压缩成功!", Snackbar.LengthShort).Show();

            // Check Zip File openable
            FileInfo   zip = new FileInfo(Compress.tmpname);
            FileStream zipStream;

            try {
                zipStream = zip.OpenRead();
            } catch (Exception ex) {
                client.Disconnect();
                HHI_Android.ShowSimpleAlertView(context, "错误", "压缩包缓存无法打开,错误信息:\n" + ex.Message.ToString());
                return(-1);
            }
            Snackbar.Make(cl, "压缩缓存校验成功!", Snackbar.LengthShort).Show();
            // Send File
            NStream stream = client.stream;

            try {
                await stream.WriteString(System.IO.Path.Combine(hi.Path, folderName));

                System.Threading.Thread.Sleep(10);
                await stream.WriteInt64(zip.Length);

                System.Threading.Thread.Sleep(10);
                await stream.WriteBigFrom(zipStream);

                System.Threading.Thread.Sleep(50);
            } catch (Exception ex) {
                client.Disconnect();
                HHI_Android.ShowSimpleAlertView(context, "错误", "网络流写错误,错误信息:\n" + ex.Message.ToString());
                return(-1);
            }
            Snackbar.Make(cl, "传输完成,等待服务器接受完毕!结果可长按按钮查看!", Snackbar.LengthLong).Show();
            return(0);
        }
Exemplo n.º 23
0
        void Connect(EndPoint remoteEP, string hostName, int port)
        {
            CheckDisposed();
            SetProgress(true);
            try
            {
                if (null == remoteEP)
                {
                    if (_resolveHostEnabled)
                    {
                        IPHostEntry host = GetHostByName(hostName);
                        if (null != host)
                        {
                            remoteEP = ConstructEndPoint(host, port);
                        }
                    }

                    if ((null == hostName) && (null == remoteEP))
                    {
                        throw new ArgumentNullException("hostName", "The value cannot be null.");
                    }
                }

                //------------------------------------
                // Get end point for the proxy server
                //
                IPHostEntry proxyEntry = GetHostByName(_proxyServer);
                if (null == proxyEntry)
                {
                    throw new SocketException(SockErrors.WSAHOST_NOT_FOUND);
                }
                //throw new HostNotFoundException("Unable to resolve proxy name.");

                IPEndPoint proxyEndPoint = ConstructEndPoint(proxyEntry, _proxyPort);

                //------------------------------------------
                // Connect to proxy server
                //
                _socket.Connect(proxyEndPoint);

                _localEndPoint  = null; //CONNECT command doesn't provide us with local end point
                _remoteEndPoint = remoteEP;

                //------------------------------------------
                // Send CONNECT command
                //
                byte[] cmd = PrepareConnectCmd(remoteEP, hostName, port);
                NStream.Write(cmd, 0, cmd.Length);

                //------------------------------------------
                // Read the response from proxy the server.
                //
                int read = 0;
                while (read < 8)
                {
                    read += NStream.Read(_response,
                                         read,
                                         _response.Length - read);
                }

                VerifyResponse();

                //---------------------------------------
                //I we unable to resolve remote host then
                //store information - it will required
                //later for BIND command.
                if (null == remoteEP)
                {
                    _remotePort = port;
                    _remoteHost = hostName;
                }
            }
            finally
            {
                SetProgress(false);
            }
        }