79 lines
2.4 KiB
C#
79 lines
2.4 KiB
C#
using UnityEngine;
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using System.Net.Sockets;
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using System.Net;
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using System.Text;
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using System.Threading;
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using System;
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public class BroadcastServer : MonoBehaviour
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{
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private UdpClient udpBroadcaster; // 用于广播本地IP的UDP客户端
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private Thread broadcastThread; // 运行广播循环的线程
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private CancellationTokenSource cts = new CancellationTokenSource(); // 控制线程取消
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private volatile bool isRunning = true; // 控制广播循环的线程安全标志
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// 脚本启动时调用
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void Start()
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{
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// 初始化UDP客户端并启用广播
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udpBroadcaster = new UdpClient();
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udpBroadcaster.EnableBroadcast = true;
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// 启动新线程以广播本地IP
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broadcastThread = new Thread(() => BroadcastIP(cts.Token));
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broadcastThread.Start();
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Debug.Log("显示端正在广播IP...");
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}
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// 定期广播本地IP地址
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private void BroadcastIP(CancellationToken token)
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{
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// 定义广播端点（IP: 255.255.255.255，端口: 9999）
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IPEndPoint endPoint = new IPEndPoint(IPAddress.Broadcast, 9999);
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string localIP = GetLocalIPAddress(); // 获取本地IPv4地址
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// 在未取消的情况下持续广播
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while (!token.IsCancellationRequested && isRunning)
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{
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try
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{
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// 将IP地址转换为字节并通过UDP发送
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byte[] data = Encoding.UTF8.GetBytes(localIP);
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udpBroadcaster.Send(data, data.Length, endPoint);
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Thread.Sleep(2000); // 每2秒广播一次，减少网络负载
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}
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catch (Exception ex)
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{
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Debug.LogError($"广播错误: {ex.Message}");
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}
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}
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}
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// 获取本机的IPv4地址
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private string GetLocalIPAddress()
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{
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string localIP = "127.0.0.1"; // 如果未找到有效IP，则回退到本地回环地址
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foreach (var ip in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
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{
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if (ip.AddressFamily == AddressFamily.InterNetwork)
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{
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localIP = ip.ToString(); // 使用找到的第一个IPv4地址
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break;
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}
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}
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return localIP;
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}
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// 应用程序退出时清理资源
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private void OnApplicationQuit()
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{
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isRunning = false; // 通知广播循环停止
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cts.Cancel(); // 请求线程取消
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udpBroadcaster?.Close(); // 关闭UDP客户端
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if (broadcastThread != null && broadcastThread.IsAlive)
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{
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broadcastThread.Join(1000); // 等待线程结束，超时1秒
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}
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}
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} |