Windows phone 7中的设备发现

我无法检测到网络中存在的设备。我正在使用两个应用程序。一个是用C++编写的，另一个是windows phone 7应用程序。从Wp7我发送UDP广播，我从How to broadcast a UDP packet on WP7 Mango?引用我能够从wp7广播消息和在C++应用程序接收。但我无法从C++代码接收UDP数据包。这是我的代码。 C＃代码Windows phone 7中的设备发现

private void PageTitle_Tap(object sender, GestureEventArgs e) 
     { 
      var ipAddress = IPAddress.Parse("255.255.255.255"); 
      var endpoint = new IPEndPoint(ipAddress, 4998); 
      byte[] data = Encoding.UTF8.GetBytes("hello|4998"); 
      var args = new SocketAsyncEventArgs(); 
      args.RemoteEndPoint = endpoint; 
      args.SetBuffer(data, 0, data.Length); 
      args.Completed += new EventHandler<SocketAsyncEventArgs>(args_Completed); 
      socket = new Socket(AddressFamily.InterNetwork, 
       SocketType.Dgram, 
       ProtocolType.Udp); 
      bool result = socket.ConnectAsync(args); 

     } 

     void args_Completed(object sender, SocketAsyncEventArgs e) 
     { 
      if (e.SocketError != SocketError.Success) 
      { 
       return; 
      } 

      switch (e.LastOperation) 
      { 
       case SocketAsyncOperation.Connect: 
        bool res = e.ConnectSocket.ReceiveFromAsync(e); 
        break; 

       case SocketAsyncOperation.Send: 
        break; 

       case SocketAsyncOperation.Receive: 
        break; 
      } 
     }

C++代码

ServerAddress.sin_family= AF_INET; 
ServerAddress.sin_addr.s_addr= INADDR_ANY; 
ServerAddress.sin_port = htons (PORT_DESKTOP); 
ServerSocket = socket (PF_INET, SOCK_DGRAM, 0); 

sendto (ServerSocket, Buffer, sizeof (Buffer), 0, (LPSOCKADDR) &ClientAddress, Length);

我也用创建使用IPADDRESS.Any接收message.But另一个插座，我无法从C++代码得到响应。

在此先感谢。

来源

2011-12-20 nucleons