用C#实现网络唤醒功能

时间 2020-10-19

标签网络 ide 测试 this spa string table 栏目 C# 繁體版

原文原文链接

C#网络唤醒模块

前提：
    一、已知欲开启机的网卡物理地址（MAC)
    二、用一些第三方应用软件测试（如：国产LanHelper)能够开启LAN内的任一机器，证实硬件设置正确。
基本思路来自网上一些介绍：
    一、采用UDP 协议
    二、向LAN中的欲开启PC机发送16进制的“FFFFFF"和网卡物理地址的16次重复

using System;
using System.Net.Sockets;

//we derive our class from a standart one
public class WOLClass:UdpClient
{
    public WOLClass():base()
    { }
    //this is needed to send broadcast packet
    public void SetClientToBrodcastMode()
    {
      if(this.Active)
       this.Client.SetSocketOption(SocketOptionLevel.Socket,
                                 SocketOptionName.Broadcast,0);
    }
}

...
//now use this class
//MAC_ADDRESS should look like '013FA049'
private void WakeFunction(string MAC_ADDRESS)
{
      WOLClass client=new WOLClass();
      client.Connect(new
         IPAddress(0xffffffff), //255.255.255.255 i.e broadcast
         0x2fff); // port=12287 let's use this one
      client.SetClientToBrodcastMode();
      //set sending bites
      int counter=0;
      //buffer to be send
      byte[] bytes=new byte[1024];   // more than enough :-)
     //first 6 bytes should be 0xFF
     for(int y=0;y<6;y++)
        bytes[counter++]=0xFF;
     //now repeate MAC 16 times
     for(int y=0;y<16;y++)
     {
         int i=0;
         for(int z=0;z<6;z++)
         {
              bytes[counter++]=
                  byte.Parse(MAC_ADDRESS.Substring(i,2),
                  NumberStyles.HexNumber);
              i+=2;
         }
     }

//now send wake up packet int reterned_value=client.Send(bytes,1024); }