Module_Script

#!/usr/bin/env python

#"subprocess" module is used to perform terminal based commands and subprocess
#"re" module is used to perform Regular Expressions or Regex task
import subprocess as su
import re

#Commands for changing MAC_Address is as follows
#ifconfig eth0 down (This command will shut down the eth0 port)
#ifconfig eth0 hw ether 00:11:22:33:44:55
#(This command changes the MAC address, ether is the reference name for MAC address)
#ifconfig eth0 up (This command gets the eth0 port up and running)


# We have to create two classes one of which will pick up the value of MAC address
# While the second class will change the value of the MAC Address


class MAC_Changer:
    def __init__(self): #This is a constructor
        self.MAC =""
        
    def get_MAC_address(self, interface): #This function will capture the value of MAC address
        #This function will use itself as an input and value of interface as second parameter
        output = su.run(["ifconfig", interface], shell = False, capture_output = True)
        result = output.stdout.decode('utf-8')
        print(result)
        pattern = r'ether\s[\da-z]{2}:[\da-z]{2}:[\da-z]{2}:[\da-z]{2}:[\da-z]{2}:[\da-z]{2}'
        regex = re.compile(pattern)
        output = regex.search(result)
        current_MAC = output.group().split(" ")[1]
        self.MAC = current_MAC
        return current_MAC
        
       def change_MAC(self, interface, new_MAC):
           print("[+] Current MAC Address is ", self.get_MAC_address(interface))
           output = su.run(["ifconfig", interface, "down", shell = False, capture_output = True)
           print(output.stderr.decode('utf-8'))
           output = su.run(["ifconfig", interface, "hw", "ether", new_MAC], shell = False, capture_output = True0
           print(output.stderr.decode('utf-8'))
           output = su.run(["ifconfig", interface, "up"], shell = False, capture_output = True)
           print(output.stderr.decode('utf-8'))
           print("[+] Updated MAC Address is ", self.get_MAC_address(interface)
           return self.get_MAC_address(interface)
           
           #To run this command use change_MAC(<name of your network interface>, The new address of your choice)