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 logging.getLogger("scapy").setLevel(logging.CRITICAL)
33 import scapy.all as sp
36 from sniffer import Sniffer
37 from time import sleep
39 def check_icmp6_error(args, packet):
40 ip6 = packet.getlayer(sp.IPv6)
43 oip6 = sp.IPv6(src=args.src[0], dst=args.to[0])
44 if ip6.dst != oip6.src:
46 icmp6 = packet.getlayer(sp.ICMPv6ParamProblem)
49 # ICMP6_PARAMPROB_HEADER 0
52 # Should we check the payload as well?
53 # We are running in a very isolated environment and nothing else
54 # should trigger an ICMPv6 Param Prob so leave it.
59 parser = argparse.ArgumentParser("frag6.py",
60 description="IPv6 fragementation test tool")
61 parser.add_argument('--sendif', nargs=1,
63 help='The interface through which the packet will be sent')
64 parser.add_argument('--recvif', nargs=1,
66 help='The interface on which to check for the packet')
67 parser.add_argument('--src', nargs=1,
69 help='The source IP address')
70 parser.add_argument('--to', nargs=1,
72 help='The destination IP address')
73 parser.add_argument('--debug',
74 required=False, action='store_true',
75 help='Enable test debugging')
77 args = parser.parse_args()
80 # Start sniffing on recvif
81 sniffer = Sniffer(args, check_icmp6_error)
84 ########################################################################
86 # A single start fragment with zero length IPv6 header (jumbo).
87 # Make sure we do hit the Fragment case, which is tricky as the
88 # jumbogram needs to be > 64k.
90 # A: Jumbo-Fragment not allowed.
91 # R: ICMPv6 param problem.
93 #data = "6" * (65536 - 2 - 6 - 8 - 8)
95 ip6f01 = sp.Ether() / \
96 sp.IPv6(src=args.src[0], dst=args.to[0], plen=0) / \
97 sp.IPv6ExtHdrHopByHop(options=sp.Jumbo(jumboplen=65536)) / \
98 sp.IPv6ExtHdrFragment(offset=0, m=1, id=6) / \
99 sp.UDP(dport=3456, sport=6543) / \
103 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
105 # We should only need to sleep 0.10 but it seems scapy
106 # takes time for this one.
110 if not sniffer.foundCorrectPacket:
115 if __name__ == '__main__':