3 # SPDX-License-Identifier: BSD-2-Clause
5 # Copyright (c) 2019 Netflix, Inc.
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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
32 import scapy.all as sp
35 from sniffer import Sniffer
36 from time import sleep
38 def check_icmp6_error(args, packet):
39 ip6 = packet.getlayer(sp.IPv6)
42 oip6 = sp.IPv6(src=args.src[0], dst=args.to[0])
43 if ip6.dst != oip6.src:
45 icmp6 = packet.getlayer(sp.ICMPv6ParamProblem)
48 # ICMP6_PARAMPROB_HEADER 0
51 # Should we check the payload as well?
52 # We are running in a very isolated environment and nothing else
53 # should trigger an ICMPv6 Param Prob so leave it.
58 parser = argparse.ArgumentParser("frag6.py",
59 description="IPv6 fragementation test tool")
60 parser.add_argument('--sendif', nargs=1,
62 help='The interface through which the packet will be sent')
63 parser.add_argument('--recvif', nargs=1,
65 help='The interface on which to check for the packet')
66 parser.add_argument('--src', nargs=1,
68 help='The source IP address')
69 parser.add_argument('--to', nargs=1,
71 help='The destination IP address')
72 parser.add_argument('--debug',
73 required=False, action='store_true',
74 help='Enable test debugging')
76 args = parser.parse_args()
79 # Start sniffing on recvif
80 sniffer = Sniffer(args, check_icmp6_error)
83 ########################################################################
85 # 0-byte first fragment.
87 # A: 0-byte fragment payload not allowed. Discarded.
88 # R: ICMPv6 param prob, paramprob header.
90 ip6f01 = sp.Ether() / \
91 sp.IPv6(src=args.src[0], dst=args.to[0]) / \
92 sp.IPv6ExtHdrFragment(offset=0, m=1, id=4)
95 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
99 if not sniffer.foundCorrectPacket:
104 if __name__ == '__main__':