如何配置插座连接超时 [英] How to configure socket connect timeout

问题描述

当客户端试图连接到断开连接的IP地址，还有很长的超时时间在15秒内......我们怎样才能减少这种超时？什么是配置方法？

在code我使用建立一个套接字连接如下：

 尝试
{
    m_clientSocket =新的Socket（
         AddressFamily.InterNetwork，
         SocketType.Stream，
         ProtocolType.Tcp）;    ip地址IP = IPAddress.Parse（SERVERIP）;
    INT iPortNo = System.Convert.ToInt16（serverPort）;
    IPEndPoint IPEND =新IPEndPoint（IP，iPortNo）;    m_clientSocket.Connect（IPEND）;
    如果（m_clientSocket.Connected）
    {
        lb_connectStatus.Text =连接已​​建立;
        WaitForServerData（）;
    }
}
赶上（SocketException SE）
{
    lb_connectStatus.Text =连接失败;
    MessageBox.Show（se.Message）;
}
 

解决方案

我用Socket.ConnectAsync方法而不是Socket.Connect方法解决了这个问题。
调用Socket.ConnectAsync（的SocketAsyncEventArgs）后，启动一个定时器（timer_connection），如果时间到了，检查套接字连接是否已连接（如果（m_clientSocket.Connected）），如果不，弹出超时错误。

 私人无效连接（字符串ipAdd，串口）
    {
        尝试
        {
            的SocketAsyncEventArgs E =新的SocketAsyncEventArgs（）;
            m_clientSocket =新的Socket（AddressFamily.InterNetwork，SocketType.Stream，ProtocolType.Tcp）;            ip地址IP = IPAddress.Parse（SERVERIP）;
            INT iPortNo = System.Convert.ToInt16（serverPort）;
            IPEndPoint IPEND =新IPEndPoint（IP，iPortNo）;            // m_clientSocket。
            e.RemoteEndPoint = IPEND;
            e.UserToken = m_clientSocket;
            e.Completed + =新的EventHandler＆LT;＆的SocketAsyncEventArgs GT;（e_Completed）;
            m_clientSocket.ConnectAsync（E）;            如果（timer_connection！= NULL）
            {
                timer_connection.Dispose（）;
            }
            其他
            {
                timer_connection =新的Timer（）;
            }
            timer_connection.Interval = 2000;
            timer_connection.Tick + =新的EventHandler（timer_connection_Tick）;
            timer_connection.Start（）;
        }
        赶上（SocketException SE）
        {
            lb_connectStatus.Text =连接失败;
            MessageBox.Show（se.Message）;
        }
    }
私人无效e_Completed（对象发件人，让SocketAsyncEventArgs E）
    {
        lb_connectStatus.Text =连接已​​建立;
        WaitForServerData（）;
    }
    私人无效timer_connection_Tick（对象发件人，EventArgs的发送）
    {
        如果（！m_clientSocket.Connected）
        {
            的MessageBox.show（连接超时）;
            // m_clientSocket = NULL;            timer_connection.Stop（）;
        }
    }
 

When the Client tries to connect to a disconnected IP address, there is a long timeout over 15 seconds... How can we reduce this timeout? What is the method to configure it?

The code I'm using to set up a socket connection is as following:

try
{
    m_clientSocket = new Socket(
         AddressFamily.InterNetwork,
         SocketType.Stream,
         ProtocolType.Tcp);

    IPAddress ip = IPAddress.Parse(serverIp);
    int iPortNo = System.Convert.ToInt16(serverPort);
    IPEndPoint ipEnd = new IPEndPoint(ip, iPortNo);

    m_clientSocket.Connect(ipEnd);
    if (m_clientSocket.Connected)
    {
        lb_connectStatus.Text = "Connection Established";
        WaitForServerData();
    }
}
catch (SocketException se)
{
    lb_connectStatus.Text = "Connection Failed";
    MessageBox.Show(se.Message);
}

解决方案

I solved the problem by using Socket.ConnectAsync Method instead of Socket.Connect Method. After invoking the Socket.ConnectAsync(SocketAsyncEventArgs), start a timer (timer_connection), if time is up, check whether socket connection is connected (if(m_clientSocket.Connected)), if not, pop up timeout error.

private void connect(string ipAdd,string port)
    {
        try
        {
            SocketAsyncEventArgs e=new SocketAsyncEventArgs();


            m_clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            IPAddress ip = IPAddress.Parse(serverIp);
            int iPortNo = System.Convert.ToInt16(serverPort);
            IPEndPoint ipEnd = new IPEndPoint(ip, iPortNo);

            //m_clientSocket.
            e.RemoteEndPoint = ipEnd;
            e.UserToken = m_clientSocket;
            e.Completed+=new EventHandler<SocketAsyncEventArgs>(e_Completed);                
            m_clientSocket.ConnectAsync(e);

            if (timer_connection != null)
            {
                timer_connection.Dispose();
            }
            else
            {
                timer_connection = new Timer();
            }
            timer_connection.Interval = 2000;
            timer_connection.Tick+=new EventHandler(timer_connection_Tick);
            timer_connection.Start();
        }
        catch (SocketException se)
        {
            lb_connectStatus.Text = "Connection Failed";
            MessageBox.Show(se.Message);
        }
    }
private void e_Completed(object sender,SocketAsyncEventArgs e)
    {
        lb_connectStatus.Text = "Connection Established";
        WaitForServerData();
    }
    private void timer_connection_Tick(object sender, EventArgs e)
    {
        if (!m_clientSocket.Connected)
        {
            MessageBox.Show("Connection Timeout");
            //m_clientSocket = null;

            timer_connection.Stop();
        }
    }

这篇关于如何配置插座连接超时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！