Python Penetration Testing Cookbook

How to do it...

Here are the steps to write a sniffer with scapy module:

1. Create a file called scapy-sniffer.py and open it with your editor.
2. As usual, import the required modules for the script:

import sys
from scapy.all import *  

3. Then, define the variables required. Here we need to define the interface to sniff:

interface = "en0"

You can get the interface to be used with the help of the ifconfig command in Linux and macOS:

4. Now we can write a function to handle the sniffed packets, which will be provided as the callback function for the sniffer:

def callBackParser(packet):
   if IP in packet:
     source_ip = packet[IP].src
     destination_ip ...