在所有NIC上使用IPv4和IPv6廣播UDP消息

Question

我正在編寫幾個函數來允許我使用IPv4和IPv6發送UDP廣播/多播。以下代碼執行此操作。我遇到的問題是它只對單個適配器執行此操作。如果我的電腦上安裝了兩個網絡適配器，則它不會同時發送廣播。是否可以配置單個套接字來處理IPv4和IPv6以及在所有NIC上發送和接收？或者我必須爲每個IP地址創建單獨的套接字？

public void CreateBroadcaster(CancellationToken cancellationToken, int discoveryPort, int advancePort) 
    { 
     _cancellationToken = cancellationToken; 

     _broadcastEndpoint = new IPEndPoint(IPAddress.Broadcast, advancePort); 

     var epLocal = new IPEndPoint(IPAddress.IPv6Any, discoveryPort); 

     _broadcaster = new UdpClient(epLocal); 

     var soc = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp); 
     soc.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false); 

     _broadcaster.Client = soc; 

     _broadcaster.Client.DualMode = true; 

     _broadcaster.Client.Bind(epLocal); 

     _broadcaster.EnableBroadcast = true; 
     _broadcaster.MulticastLoopback = true; 

     _broadcaster.Client.SetSocketOption(
      SocketOptionLevel.IPv6, 
      SocketOptionName.AddMembership, 
      new IPv6MulticastOption(IPAddress.Parse("ff02::1"))); 
    } 

    public void SendPingsOnAdapterLocalSubnets() 
    { 
     _broadcaster.Send(_sendData, _sendData.Length, _broadcastEndpoint); 
    } 

Answer 1

您需要2個獨立的套接字。在低級別上，sockaddr結構體將有一個或另一個。 IPv4（AF_INET）或IPv6（AF_INET6）。

http://www.gnu.org/software/libc/manual/html_node/Address-Formats.html#Address-Formats