Question

我正在编写一些函数，允许我使用IPv4和IPv6发送UDP广播/多播。以下代码执行此操作。我遇到的问题是它只对单个适配器执行此操作。如果我的PC上安装了两个网络适配器，则不会同时发送广播。是否可以将单个套接字配置为同时处理IPv4和IPv6以及在所有NIC上发送和接收？或者我是否必须为每个IP地址创建单独的套接字？

    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个独立的插座。在低级别，sockaddr结构将具有一个或另一个。 IPv4（AF_INET）或IPv6（AF_INET6）。

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

在所有NIC上使用IPv4和IPv6广播UDP消息

1 个答案: