c# - Linux 服务器套接字到 Windows 客户端套接字

Question

您好，我正在编写一段代码，将 Windows 客户端连接到 Linux 服务器套接字。我已经可以建立连接，但似乎 Linux 服务器总是在几秒钟后切断我的连接，而不向我发送回我需要的响应。另外，我已经尝试过使用 telnet，但几秒钟后，Linux 服务器再次切断了我的连接。

使用 Windows 套接字连接到 Linux 服务器套接字是否存在问题？

            IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("IPADDRESS"), 6004);
            // Create a TCP/IP  socket.
            Socket sender = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            // Connect the socket to the remote endpoint. Catch any errors.
            try
            {
                if (!sender.Connected)
                    sender.Connect(remoteEP);

                string data = new Client().Test();

                DE_ISO8583 de = new ISO8583().Parse(data);

                data = data.Length.ToString().PadLeft(4, '0') + data;
                byte[] msg = Encoding.ASCII.GetBytes(data);

                int bytesSent = sender.Send(msg);

                //// Receive the response from the remote device.
                int bytesRec = sender.Receive(bytes);
                Console.WriteLine("Received = {0}",
                    Encoding.ASCII.GetString(bytes, 0, bytesRec));

                //sender.Disconnect(true);

                //sender.Shutdown(SocketShutdown.Both);
                //sender.Close();
            }
            catch (ArgumentNullException ane)
            {
                Console.WriteLine("ArgumentNullException : {0}", ane.ToString());
            }
            catch (SocketException se)
            {
                Console.WriteLine("SocketException : {0}", se.ToString());
            }
            catch (Exception e)
            {
                Console.WriteLine("Unexpected exception : {0}", e.ToString());
            }

Answer 1

服务器可能由于没有事件而关闭连接。启用 keepalive 选项将定期向服务器发送一个空数据报以保持连接处于事件状态。请参阅下面的代码

            TcpClient client = new TcpClient();
            client.Client.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.KeepAlive, true);​