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# 29 30import argparse 31import logging 32logging.getLogger("scapy").setLevel(logging.CRITICAL) 33import scapy.all as sp 34import socket 35import sys 36from time import sleep 37 38def main(): 39 parser = argparse.ArgumentParser("frag6.py", 40 description="IPv6 fragementation test tool") 41 parser.add_argument('--sendif', nargs=1, 42 required=True, 43 help='The interface through which the packet will be sent') 44 parser.add_argument('--recvif', nargs=1, 45 required=True, 46 help='The interface on which to check for the packet') 47 parser.add_argument('--src', nargs=1, 48 required=True, 49 help='The source IP address') 50 parser.add_argument('--to', nargs=1, 51 required=True, 52 help='The destination IP address') 53 parser.add_argument('--debug', 54 required=False, action='store_true', 55 help='Enable test debugging') 56 57 args = parser.parse_args() 58 59 60 ######################################################################## 61 # 62 # Sysctl set to accept (no|maximum 10) fragments. 63 # 64 # A: Discarded. 65 # R: Silence (statistics only) or ICMPv6 timeout expiry. 66 # 67 data = "6" * 1280 68 bfid = 0x5001 69 for i in range(20): 70 fid = bfid + i 71 ip6f01 = sp.Ether() / \ 72 sp.IPv6(src=args.src[0], dst=args.to[0]) / \ 73 sp.IPv6ExtHdrFragment(offset=0, m=1, id=fid) / \ 74 sp.UDP(dport=3456, sport=6543) / \ 75 data 76 if args.debug : 77 ip6f01.display() 78 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False) 79 80 # Wait for possible expiry to happen. 81 sleep(3) 82 sys.exit(0) 83 84if __name__ == '__main__': 85 main() 86