unity发送局域网广播信息

开发中有事需要一个功能是教师机通过广播发送给学生机实现通讯，这时可以考试使用socket的udp广播功能来实现，代码如下：

using System;
using System.Text;
using UnityEngine;
using System.Net.Sockets;
using System.Net;


public class NewBehaviourScript : MonoBehaviour
{
    private UdpClient UDPrecv;
    private void Start()
    {
             
        UDPrecv = new UdpClient();
        Socket socket = new  Socket(AddressFamily.InterNetwork,SocketType.Dgram,ProtocolType.Udp);
        socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
        socket.Bind(new IPEndPoint(IPAddress.Any, 9999));
        UDPrecv.Client = socket;

        UDPrecv.BeginReceive(ReceiveCallback, null);

    }
    private void Update()
    {
        Broad("这是一条广播信息");
    }

    public void Broad(string mes)
    {
        UdpClient UDPsend = new UdpClient(new IPEndPoint(IPAddress.Any, 0));
        IPEndPoint endpoint = new IPEndPoint(IPAddress.Broadcast, 9999);
        byte[] message = Encoding.UTF8.GetBytes(mes);
        UDPsend.Send(message, message.Length, endpoint);       
    }

    private void ReceiveCallback(IAsyncResult ar)
    {
        IPEndPoint endpoint = null;
        byte[] recvBuf = UDPrecv.EndReceive(ar, ref  endpoint);
        string msg = Encoding.UTF8.GetString(recvBuf);
        Debug.Log("收到"+ endpoint.Address+"的广播消息："+ msg);//收到广播后打印一下，需要需要注意的是这个是子线程，需要UI等操作需要自己转到主线程
        UDPrecv.BeginReceive(new AsyncCallback(ReceiveCallback), null);//收到信息后继续开始接受信息
    }
}