#!/usr/bin/env python
# Quick Python script to generate random valid MAC address for XEN Domains
#Copyright (C) 2008  Allen Sanabria

#This program is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2 of the License, or
#(at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License along
#with this program; if not, write to the Free Software Foundation, Inc.,
#51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# This address range is reserved for use by Xen 00:16:3E
# I'm importing the function choice of the random module
# The reason for this is so that it will pick a random character from the string I gave it to generate a valid MAC for XEN

from random import choice
from sys import stdin
def x():
  X = choice("0123456789ABCDEF")
  return str(X)
print "Enter how many MAC Addresses do you want me to generate: "
mac = stdin.readline()
mac_list = []
for i in range(int(mac)):
  mac_list.append("00:16:3E"+":"+x()+x()+":"+x()+x()+":"+x()+x())
for con in range(len(mac_list)):
  while mac_list.count(mac_list[con]) > 1:
    print "OH NOOO DUPPPE "+mac_list[con]
    mac_list.pop(con)
    mac_list.insert(con, "00:16:3E"+":"+x()+x()+":"+x()+x()+":"+x()+x())
  print mac_list[con]

OUTPUT

import os, sys

from random import randint



if len(sys.argv)<2:

  print
'Usage: %s [0-9]+' % os.path.basename(sys.argv[0])

 
sys.exit(1)



for mac in [ ':'.join(['%02x' % randint(0,255) for p in
range(3)]) for r in range(int(sys.argv[1])) ]:

  print '00:16:3e:' + mac