网络唤醒(Wake On LAN) - ASP.NET Core 6 部署在 ARM 树莓派实现网络唤醒

ASP.NET Core 6 部署在 ARM 树莓派实现网络唤醒

网络唤醒(Wake On LAN)

Wake-on-LAN简称WOL或WoL，中文多译为“网上唤醒”、“远程唤醒”技术。WOL是一种技术，同时也是该技术的规范标准，它的功效在于让已经进入休眠状态或关机状态的计算机，透过局域网（多半为以太网）的另一端对其发令，使其从休眠状态唤醒、恢复成运作状态，或从关机状态转成引导状态。此外，与WOL相关的技术也包括远程下令关机、远程下令重启等相关的遥控机制。

修改 HomeController 控制器，添加网络唤醒的接口，代码如下：


https://mp.weixin.qq.com/s/gC0ocbXHJQJ76fpnF33cmw

HomeController 控制器，添加网络唤醒的接口，代码如下：

using HomeCloud.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using System.Diagnostics;
using System.Net.Sockets;

namespace HomeCloud.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        
        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult WOL(string mac)
        {
            WakeUpCore(FormatMac(mac));
            return Json(new { ret = true });
        }
      
        private static void WakeUpCore(byte[] mac)
        {
            //发送方法是通过UDP
            using UdpClient client = new UdpClient();
            //Broadcast内容为：255,255,255,255.广播形式，所以不需要IP
            client.Connect(System.Net.IPAddress.Broadcast, 50000);
            //下方为发送内容的编制，6遍“FF”+17遍mac的byte类型字节。
            byte[] packet = new byte[17 * 6];
            for (int i = 0; i < 6; i++)
                packet[i] = 0xFF;
            for (int i = 1; i <= 16; i++)
                for (int j = 0; j < 6; j++)
                    packet[i * 6 + j] = mac[j];
            //唤醒动作
            int result = client.Send(packet, packet.Length);
        }

        private static byte[] FormatMac(string macInput)
        {
            byte[] mac = new byte[6];
            string str = macInput;
            //消除MAC地址中的“-”符号
            string[] sArray = str.Split('-');
            //mac地址从string转换成byte
            for (var i = 0; i < 6; i++)
            {
                var byteValue = Convert.ToByte(sArray[i], 16);
                mac[i] = byteValue;
            }
            return mac;
        }
    }
}