Simple ICMP Packet Sniffer

packet_sniffer.py

import os
import socket
from argparse import ArgumentParser, RawDescriptionHelpFormatter

# configuring the argument
parser = ArgumentParser(description="host discovery tool",
                        formatter_class=RawDescriptionHelpFormatter)
parser.add_argument("--host",
                    help="hostname to bind",
                    metavar="HOSTNAME/IP",
                    required=True)
# actually parsing the args
args = parser.parse_args()

# instancing the sniffer
# setting the protocol to capture only ICMP Packets
sniffer = socket.socket(socket.AF_INET,
                        socket.SOCK_RAW,
                        proto=socket.IPPROTO_ICMP)

# binding to the host:port
sniffer.bind((args.host, 0))

# including the ip header in capture packet
sniffer.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)

# getting the raw packet data along with ip and port
pkt = sniffer.recvfrom(65565)

# formatting
print("Remote IP:", pkt[1][0])
print("Remote PORT:", pkt[1][1])
print("Data:", pkt[0])