change-mac.py

import subprocess
import optparse
import re


def get_arguments():
    parser = optparse.OptionParser()
    parser.add_option("-i","--interface",dest="interface",help="enter interface")
    parser.add_option("-m","--mac",dest="new_mac",help="enter new mac")
    (options,arguments) =  parser.parse_args();
    if not options.interface:
        parser.error('[-] invalid  interface')

    if not options.new_mac:
        parser.error('[-] invalid mac')
    return options;

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


def get_current_mac(interface):
    if_config_result = subprocess.check_output(["ifconfig",interface])
    reg_exp_match = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w",if_config_result.decode('utf-8'))
    if reg_exp_match:
        return reg_exp_match.group(0)

    else:
        print("[-] we could not read the current mac address of "+ interface)


options =  get_arguments();

current_mac = get_current_mac(options.interface)
print("[+] current mac is "+ str(current_mac))
mac_changer(options.interface,options.new_mac)
current_mac = get_current_mac(options.interface)
if current_mac == options.new_mac:
    print("[+]current mac is successfully changed to "+ options.new_mac)
else:
    print("[+]current mac could not be changed")