Unity使用UDP在局域网广播本地IP

使用Unity 在局域网中创建链接,更简便的方法获得服务器IP。  

想到的办法是通过服务器在局域网中广播本地IP地址：

    private static Socket sock;
    private static IPEndPoint iep1;
    private static byte[] data;
    private Thread t;

    public int udpPort = 9050;

    public void BroadcastIP()
    {
        sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

        iep1 = new IPEndPoint(IPAddress.Broadcast, udpPort);

        data = Encoding.ASCII.GetBytes("111");

        sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);

        t = new Thread(BroadcastMessage);
        t.Start();
    }

    private void BroadcastMessage()
    {