C# UDP 套接字应用程序来侦听来自各种套接字的消息 [英] C# UDP socket app to listen to messages from various sockets

问题描述

我有一个系统监视器应用程序，它需要监听来自另一台机器上各种 UDP 套接字的消息.其他套接字不断地向这个给定的 IP/端口发送心跳.

I have a system monitor app that needs to listen to messages from various UDP sockets on another machine. The other sockets continuously send heartbeats to this given IP/port.

调用 BeginReceiveFrom 时抛出此异常:由于套接字未连接并且(使用 sendto 调用在数据报套接字上发送时)未提供地址，因此不允许发送或接收数据的请求"

This exception gets thrown when calling BeginReceiveFrom: "A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied"

我不应该调用 connect 因为数据已经发送到这个 ip 端点.加上数据来自各种套接字.

I shouldn't have to call connect because data is already getting sent to this ip endpoint. plus the data is coming from various sockets.

    private Socket m_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        // bind socket
        // Establish the local endpoint for the socket.
        // Dns.GetHostName returns the name of the 
        // host running the application.
        IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[0];
        m_localEndPoint = new IPEndPoint(ipAddress, 19018);
        m_socket.Bind(m_localEndPoint);

        m_socket.BeginReceiveFrom(m_data, 
                                  m_nBytes, 
                                  MAX_READ_SIZE, 
                                  SocketFlags.None,
                                  ref m_localEndPoint, 
                                  new AsyncCallback(OnReceive),
                                  null);

    }

    private void OnReceive(IAsyncResult ar)
    {
            int nRead = m_socket.EndReceiveFrom(ar, ref m_localEndPoint);
     }

推荐答案

我能够通过 UdpClient 类获得所需的行为.

I was able to get the desired behavior with the UdpClient class.

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