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 time import sleep
39 parser = argparse.ArgumentParser("frag6.py",
40 description="IPv6 fragementation test tool")
41 parser.add_argument('--sendif', nargs=1,
43 help='The interface through which the packet will be sent')
44 parser.add_argument('--recvif', nargs=1,
46 help='The interface on which to check for the packet')
47 parser.add_argument('--src', nargs=1,
49 help='The source IP address')
50 parser.add_argument('--to', nargs=1,
52 help='The destination IP address')
53 parser.add_argument('--debug',
54 required=False, action='store_true',
55 help='Enable test debugging')
57 args = parser.parse_args()
60 ########################################################################
62 # Sysctl set to accept maximum 3 segments on a fragmented packet.
63 # The 4th packet will flush the entire q6.
66 # R: Silence (statistics only) no ICMPv6 as we skip the off=0 segment.
70 foffset=16 + (i * (0x100 + (int)(16 / 8)))
71 ip6f01 = sp.Ether() / \
72 sp.IPv6(src=args.src[0], dst=args.to[0]) / \
73 sp.IPv6ExtHdrFragment(offset=foffset, m=1, id=15) / \
74 sp.UDP(dport=3456, sport=6543) / \
78 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
81 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ##
83 # Sysctl set to accept maximum 3 segments on a fragmented packet.
84 # The 4th packet will flush the entire q6.
85 # This time we play proper offset/length games on the packets in order
86 # to trigger the 2nd test case, with the last packet still having m=1.
89 # R: ICMPv6 timeout expired.
93 foffset=(i * (int)(16 / 8))
94 ip6f01 = sp.Ether() / \
95 sp.IPv6(src=args.src[0], dst=args.to[0]) / \
96 sp.IPv6ExtHdrFragment(offset=foffset, m=1, id=0x1501) / \
97 sp.UDP(dport=3456, sport=6543) / \
101 sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
105 if __name__ == '__main__':