无法通过无线网络连接在WinRT平板电脑上接收多播UDP

问题描述

将标题更改为多播UDP（非USB）。

Changed the title to be Multicast UDP (not USB).

我正在尝试实施MDNS库来发现联网设备并遇到问题。  我的图书馆可以通过有线和无线网络在英特尔产品上运行良好，并且它可以通过ARM设备（原始NVidia平板电脑之一）的有线网络连接超过
。  它不会通过ARM平板电脑（NVidia和Surface）检测无线网络上的任何多播流量。

I am trying to implement a MDNS library to discover networked devices and am having a problem.  My library works well from Intel products over both wired and wireless networks and it works from an ARM device (one of the original NVidia tablets) over a wired network connection.  It does not detect any of the multicast traffic over a wireless network from an ARM tablet (both an NVidia and a Surface).

我的代码如下所示：

private async void InitializeSocket()
{
    try
    {
        _socket = new DatagramSocket();
        _socket.MessageReceived += HandleMessageReceived;

        await _socket.BindServiceNameAsync("5353");
        _socket.JoinMulticastGroup(_multicastAddress);
        _multicastGroupJoined = true;
        _multicastJoinTask = null;
    }
    catch (Exception e)
    {
        Debug.WriteLine("MDNSIOChannel.InitializeSocket: Exception: ", e.Message);
        Debug.WriteLine(e.StackTrace);
        RetryJoinMulticast();
    }
}

private void HandleMessageReceived(DatagramSocket aSocket,
                                   DatagramSocketMessageReceivedEventArgs anArgs)
{
    if (_disposed || (null == MessageReceived) || (null == anArgs.RemoteAddress))
    {
        return;
    }

    try
    {
        MessageReceived(this, new DatagramEventArgs(anArgs));
    }
    catch (Exception e)
    {
        Debug.WriteLine("MDNSIOChannel.HandleMessageReceived: Exception: " + e.Message);
        Debug.WriteLine(e.StackTrace);
        throw;
    }
}

推荐答案

使用与上述片段类似的代码，我们做错了什么？

Using similar code to the fragment above, so are we doing something wrong?

Larry：主题应该是多播UDP而不是多播USB！

Larry: subject should be Multicast UDP not Multicast USB!

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