1#!/usr/bin/env python 2#- 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2019 Netflix, Inc. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30 31import argparse 32import logging 33logging.getLogger("scapy").setLevel(logging.CRITICAL) 34import scapy.all as sp 35import socket 36import sys 37from time import sleep 38 39def main(): 40 parser = argparse.ArgumentParser("frag6.py", 41 description="IPv6 fragementation test tool") 42 parser.add_argument('--sendif', nargs=1, 43 required=True, 44 help='The interface through which the packet will be sent') 45 parser.add_argument('--recvif', nargs=1, 46 required=True, 47 help='The interface on which to check for the packet') 48 parser.add_argument('--src', nargs=1, 49 required=True, 50 help='The source IP address') 51 parser.add_argument('--to', nargs=1, 52 required=True, 53 help='The destination IP address') 54 parser.add_argument('--debug', 55 required=False, action='store_true', 56 help='Enable test debugging') 57 58 args = parser.parse_args() 59 60 61 ######################################################################## 62 # 63 # A single middle fragment. 64 # 65 # A: Waiting for more data. 66 # R: Timeout / Expiry. 67 # 68 ip6f01 = sp.Ether() / \ 69 sp.IPv6(src=args.src[0], dst=args.to[0]) / \ 70 sp.IPv6ExtHdrFragment(offset=161, m=1, id=7) / \ 71 sp.UDP(dport=3456, sport=6543) 72 if args.debug : 73 ip6f01.display() 74 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False) 75 76 # We do not generate ICMPv6 for non-off=0-segments. 77 # Wait for expiry. 78 sleep(3) 79 80 sys.exit(0) 81 82if __name__ == '__main__': 83 main() 84