mac_changer

#!usr/bin/env python

#Call the modules
import subprocess
import optparse
import re

#Create a function to record input through commands
def get_input():
    parser = optparse.OptionParser()
    parser.add_option("-i", "--interface", dest="interface", help="Interface to change its MAC adress")
    parser.add_option("-m", "--mac", dest="new_mac", help="New MAC adress")
    (options, arguments) = parser.parse_args()
    if not options.interface:
        parser.error("[-] Please specify an interface, use --help for more info.")
    elif not options.new_mac:
        parser.error("[-] Please specify a MAC adress, use --help for more info.")
    return options

#Create a function for this code
def change_mac(interface, new_mac):
    print("[+] Changing MAC adress for " + interface + " to " + new_mac)
    subprocess.call(["ifconfig", interface, "down"])
    subprocess.call(["ifconfig", interface, "hw", "ether", new_mac])
    subprocess.call(["ifconfig", interface, "up"])

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

#Calling the functions
options = get_input()

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 adress changed succesfully to " + current_mac)
else:
    print("[-]MAC adress did not get changed due to an unexpected error.")
 #EXPLANATORY LINES NOT USED
#-----------------------------
#Options to record input through commands
#parser = optparse.OptionParser()
#parser.add_option("-i", "--interface", dest="interface", help="Interface to change its MAC adress")
#parser.add_option("-m", "--mac", dest="new_mac", help="New MAC adress")
#(options, arguments) = parser.parse_args()

#Ask the user directly about the options
#interface = input("Interface? ")
#new_mac = input("New MAC? ")

#User input through command(without definig function)
#interface = options.interface
#new_mac = options.new_mac

#User information about the process
#print("[+] Changing MAC adress for " + interface + " to " + new_mac)

#Commands executed
#subprocess.call(["ifconfig", interface, "down"])
#subprocess.call(["ifconfig", interface, "hw", "ether", new_mac])
#subprocess.call(["ifconfig", interface, "up"])

#Less secure alternative way
#subprocess.call("ifconfig " + interface + " down", shell=True)
#subprocess.call("ifconfig " + interface + " hw ether " + new_mac, shell=True)
#subprocess.call("ifconfig " + interface + " up", shell=True)