Send the magic packet of Wake on LAN

wol.py

#!/usr/bin/env python

import binascii
import socket


PORT_DEFAULT = 9
IPADDR_DEFAULT = '<broadcast>'
_USAGE = """Usage:
  python wol.py [options] <MAC address>...

Options:
  -p, --port <port>
    Default port is 9
  -a, --address <IP address>
    Default IP address is '<broadcast>'
  -h, --help
    Show this help.
"""


def sendmagickpacket(macs, ipaddr=IPADDR_DEFAULT, port=PORT_DEFAULT):
    
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
    for mac in macs:
        for sep in ':-':
            if sep in mac:
                mac = ''.join([x.rjust(2, '0') for x in mac.split(sep)])
                break
        mac = mac.rjust(12, '0')
        p = '\xff' * 6 + binascii.unhexlify(mac) * 16
        s.sendto(p, (ipaddr, port))
    s.close()


def main():
    import getopt
    import sys
    
    try:
        opt, args = getopt.getopt(sys.argv[1:], 'hp:a:',
                                  ['help', 'port=', 'address='])
    except getopt.GetoptError:
        print _USAGE
        sys.exit(2)
    
    if not args:
        print _USAGE
        sys.exit(2)
    
    port = PORT_DEFAULT
    ipaddr = IPADDR_DEFAULT
    for k, v in opt:
        if k in ('-h', '--help'):
            print _USAGE
            sys.exit()
        if k in ('-p', '--port'):
            port = int(v)
        if k in ('-a', '--address'):
            ipaddr = v
    
    sendmagickpacket(args, ipaddr, port)


if __name__ == '__main__':
    main()