C# Wake On LAN (WOL)

〥羽〥

1. 
   
2. using System;
   
3. using System.Net;
   
4. using System.Net.Sockets;
   
5. 
   
6. namespace WakeOnLan
   
7. {
   
8.     class Program
   
9.     {
   
10.      static void Main(string[] args)
    
11.      {
    
12.      byte[] mac = new byte[] {0x00, 0x0F, 0x1F, 0x20, 0x2D, 0x35};
    
13.      WakeUp(mac);
    
14.      }
    
15. 
    
16.      /// <summary>
    
17.      /// Sends a Wake-On-Lan packet to the specified MAC address.
    
18.      /// </summary>
    
19.      /// <param name="mac">Physical MAC address to send WOL packet to.</param>
    
20.      private static void WakeUp(byte[] mac)
    
21.      {
    
22.      //
    
23.      // WOL packet is sent over UDP 255.255.255.0:40000.
    
24.      //
    
25.      UdpClient client = new UdpClient();
    
26.      client.Connect(IPAddress.Broadcast, 40000);
    
27. 
    
28.      //
    
29.      // WOL packet contains a 6-bytes trailer and 16 times a 6-bytes sequence containing the MAC address.
    
30.      //
    
31.      byte[] packet = new byte[17 * 6];
    
32. 
    
33.      //
    
34.      // Trailer of 6 times 0xFF.
    
35.      //
    
36.      for (int i = 0; i < 6; i++)
    
37.      packet = 0xFF;
    
38. 
    
39.      //
    
40.      // Body of magic packet contains 16 times the MAC address.
    
41.      //
    
42.      for (int i = 1; i <= 16; i++)
    
43.      for (int j = 0; j < 6; j++)
    
44.      packet[i * 6 + j] = mac[j];
    
45. 
    
46.      //
    
47.      // Submit WOL packet.
    
48.      //
    
49.      client.Send(packet, packet.Length);
    
50.      }
    
51.     }
    
52. }

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