已建立的连接被主机中的软件中止

Question

我在某些主题中找不到答案。我有一个 client/server 代码。我在单独的程序中有客户端和服务器端。这是客户端：

 try
        {

        byte[] bytes = new byte[1024];
        string text = "";
        text = uitbtextmsg.Text;
        byte[] msg = Encoding.ASCII.GetBytes(text);
        int bytesSent = User.Send(msg);
        int bytesRec = User.Receive(bytes);

        uirtbmsg.Text = uirtbmsg.Text + '\n' + " " + text;
        }
        catch (Exception E)
        {
            MessageBox.Show(E.ToString());
        }

这是当我连接到服务器并且我想用那个套接字聊天时使用的。这是我的连接：

            byte[] bytes = new byte[1024];
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[2];
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);
            Socket User = new Socket(AddressFamily.InterNetwork,
            SocketType.Stream, ProtocolType.Tcp);
            User.Connect(remoteEP);

这是服务器端：

 byte[] bytes = new Byte[1024];
        IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[2];
        IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);
        Socket listener = new Socket(AddressFamily.InterNetwork,
        SocketType.Stream, ProtocolType.Tcp);
        try
        {
            listener.Bind(localEndPoint);
            listener.Listen(10000);
            while (true)
            {
                Socket handler = listener.Accept();
                data = null;
                while (true)
                {
                    bytes = new byte[1024];
                    int bytesRec = handler.Receive(bytes);
                    data += Encoding.ASCII.GetString(bytes, 0, bytesRec);
                    TextRecieved = data;
                    Thread textbox = new Thread(new ThreadStart(WriteInReachTextBox));
                    textbox.Start();
                    break;
                }

                //uirtbreport.Text = data;
                byte[] msg = Encoding.ASCII.GetBytes(data);
                handler.Send(msg);
                handler.Shutdown(SocketShutdown.Both);
                handler.Close();
            }

        }
        catch (Exception e)
        {
            MessageBox.Show(e.ToString());
        }

当客户端第一次向服务器发送消息时，这个过程就可以了！但是当它发送另一条消息时它会抛出异常：

System.Net.Socket.SocketException(0x80004005):An established connection was aborted by the software in your host machine at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.Socket.Receive(Byte[] buffer)\r\n at Client.Form1.uibtnsendmsg_Click(Object sender, EventArgs e) in ...

Answer 1

可能是因为你打破了 while 循环（看我的评论）

while (true)
{
    Socket handler = listener.Accept();
    data = null;

    while (true)
    {
        bytes = new byte[1024];
        int bytesRec = handler.Receive(bytes);

        data += Encoding.ASCII.GetString(bytes, 0, bytesRec);
        TextRecieved = data;
        Thread textbox = new Thread(new ThreadStart(WriteInReachTextBox));
        textbox.Start();

        // -----------> HERE!!!!!!

        break;
    }

    //uirtbreport.Text = data;
    byte[] msg = Encoding.ASCII.GetBytes(data);
    handler.Send(msg);
    handler.Shutdown(SocketShutdown.Both);
    handler.Close();
}

为什么要在 'broken' 循环中创建线程？

此外，不要忘记这是一个流套接字，这意味着 'packets' 可以作为一个缓冲区发送或拆分为多个 'packets'.

Answer 2

我不清楚 textbox.Start() 做了什么，但在我看来，在服务器从客户端读取一些数据后，它中断 "while (true)" 并关闭套接字连接。这就是为什么您只能发送一条消息。

Socket handler = listener.Accept();
...
while (true)
{
    .... read data
    textbox.Start();
    break;
}

/* Here you close the connection */
handler.Shutdown(SocketShutdown.Both);
handler.Close();

Answer 3

我想你想在同一个套接字上建立一个持久的 tcp 连接。

只是不要中断循环而不是关闭套接字。

已建立的连接被主机中的软件中止

An established connection was aborted by the software in host machine

c#

sockets

connection