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#!/usr/bin/env python3
# -*- coding: utf-8 eval: (blacken-mode 1) -*-
# SPDX-License-Identifier: MIT
#
# July 29 2021, Christian Hopps <chopps@labn.net>
#
# Copyright (c) 2021, LabN Consulting, L.L.C. ("LabN")
#
import argparse
import logging
import re
import sys
from scapy.all import conf, srp
conf.verb = 0
def main():
parser = argparse.ArgumentParser()
parser.add_argument("-i", "--interface", help="interface to send packet on.")
parser.add_argument("-I", "--imports", help="scapy symbols to import")
parser.add_argument(
"-t", "--timeout", type=float, default=2.0, help="timeout for reply receipts"
)
parser.add_argument("pktdef", help="scapy packet definition to send")
args = parser.parse_args()
if args.imports:
i = args.imports.replace("\n", "").strip()
if not re.match("[a-zA-Z0-9_ \t,]", i):
logging.critical('Invalid imports specified: "%s"', i)
sys.exit(1)
exec("from scapy.all import " + i, globals(), locals())
ans, unans = srp(eval(args.pktdef), iface=args.interface, timeout=args.timeout)
if not ans:
sys.exit(2)
for pkt in ans:
print(pkt.answer.show(dump=True))
if __name__ == "__main__":
main()
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