macchanger.py

import subprocess
import optparse
import re

def get_arguments():
    parser=optparse.OptionParser()
    parser.add_option("-i","--interface",dest="interface",help="add interface")
    parser.add_option("-m","--mac",dest="new_mac",help="add new mac")
    (options,arguments)=parser.parse_args()
    if not options.interface:
        parser.error("Please specify interface or type --help for more info")
    elif not options.new_mac:
        parser.error("Please supply new MAC address or type --help for more info")
    return options

def get_current_mac(interface):
    ifconfig_result=str(subprocess.check_output(["ifconfig",interface]))
    ifconfig_search_result=re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w",ifconfig_result)
    if ifconfig_result:
        return ifconfig_search_result.group(0)
    else:
        print("[-]Could not read MAC address")

def change_mac(interface,new_mac):
    subprocess.call(["ifconfig",interface,"down"])
    subprocess.call(["ifconfig",interface,"hw","ether",new_mac])
    subprocess.call(["ifconfig",interface,"up"])

options=get_arguments()
current_mac=get_current_mac(options.interface)
print("Current MAC= "+str(current_mac))
change_mac(options.interface,options.new_mac)
current_mac=get_current_mac(options.interface)
if current_mac==options.new_mac:
	print("[+]MAC Address was succesfully changed to ",current_mac)
else:
	print("[-]MAC did not change successfully.")