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mac_changer.py
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mac_changer.py
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#!usr/bin/env python3
import subprocess, re, optparse
def get_arguments():
parser = optparse.OptionParser()
parser.add_option("-i", "--interface", dest="interface", help="Interface to change its MAC address")
parser.add_option("-m", "--mac", dest="new_mac", help="New MAC address")
(options, _) = 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 new MAC address, use --help for more info.")
return options
def change_mac(interface, new_mac):
print("[+] Changing MAC address for " + interface + " to " + new_mac)
#changing interface state to 'down'
subprocess.run(["ifconfig", interface, "down"])
#writing new value to the 'ether' that is the mac address itself
subprocess.run(["ifconfig", interface, "hw", "ether", new_mac])
#changing interface state to 'up'
subprocess.run(["ifconfig", interface, "up"])
print("[+] The change of MAC address has completed.")
def get_current_mac(interface):
#putting the output of ifconfig into the variable as a text
ifconfig_result = subprocess.check_output(["ifconfig", interface], text=True)
#using regular expression to find mac address in ifconfig result
mac_addr = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w", ifconfig_result)
#could not find mac address
if not mac_addr:
print("[-] Could not find the MAC address.")
quit()
#success in finding the mac address
#group(0) takes first found occurrence from group of matches
return mac_addr.group(0)
#main sequence
options = get_arguments()
#showing current mac
print("[!] Current MAC address is: ", get_current_mac(options.interface))
#changing mac
change_mac(options.interface, options.new_mac)
#displaying mac changing results
cur_mac = get_current_mac(options.interface)
#if mac has changed
if cur_mac == options.new_mac:
#show positive result
print("[+] MAC address was successfully changed to ", cur_mac)
else:
#display error
print("[-] MAC address change error! Maybe you should try using 'sudo' keyword.")