1 import socket
   2 import struct
   3 
   4 def wake_on_lan(macaddress):
   5     """ Switches on remote computers using WOL. """
   6 
   7     # Check macaddress format and try to compensate.
   8     if len(macaddress) == 12:
   9         pass
  10     elif len(macaddress) == 12 + 5:
  11         sep = macaddress[2]
  12         macaddress = macaddress.replace(sep, '')
  13     else:
  14         raise ValueError('Incorrect MAC address format')
  15                                                              
  16     # Pad the synchronization stream.
  17     data = ''.join(['FFFFFFFFFFFF', macaddress * 20])
  18     send_data = '' 
  19     # Split up the hex values and pack.
  20     for i in range(0, len(data), 2):
  21         send_data = ''.join([send_data,
  22         struct.pack('B', int(data[i: i + 2], 16))])
  23 
  24         # Broadcast it to the LAN.
  25         sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  26         sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
  27         sock.sendto(send_data, ('<broadcast>', 7))
  28 
  29 if __name__ == '__main__':
  30 # Use macaddresses with any seperators.
  31 
  32     wake_on_lan('0F:0F:DF:0F:BF:EF')
  33     wake_on_lan('0F-0F-DF-0F-BF-EF')
  34 # or without any seperators.
  35     wake_on_lan('0F0FDF0FBFEF')