a26e895f3d
Since 2.4.5 scapy started issuing warnings about a few different
configurations during our tests. These are harmless, but they generate
stderr output, which upsets atf_check.
Configure scapy to only log critical errors (and thus not warnings) to
fix these tests.
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
#!/usr/bin/env python
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#-
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2019 Netflix, Inc.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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import argparse
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import logging
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logging.getLogger("scapy").setLevel(logging.CRITICAL)
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import scapy.all as sp
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import socket
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import sys
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from sniffer import Sniffer
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from time import sleep
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def check_icmp6_error(args, packet):
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ip6 = packet.getlayer(sp.IPv6)
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if not ip6:
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return False
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oip6 = sp.IPv6(src=args.src[0], dst=args.to[0])
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if ip6.dst != oip6.src:
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return False
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icmp6 = packet.getlayer(sp.ICMPv6ParamProblem)
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if not icmp6:
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return False
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# ICMP6_PARAMPROB_HEADER 0
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if icmp6.code != 0:
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return False
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# Should we check the payload as well?
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# We are running in a very isolated environment and nothing else
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# should trigger an ICMPv6 Param Prob so leave it.
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#icmp6.display()
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return True
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def main():
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parser = argparse.ArgumentParser("frag6.py",
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description="IPv6 fragementation test tool")
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parser.add_argument('--sendif', nargs=1,
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required=True,
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help='The interface through which the packet will be sent')
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parser.add_argument('--recvif', nargs=1,
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required=True,
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help='The interface on which to check for the packet')
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parser.add_argument('--src', nargs=1,
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required=True,
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help='The source IP address')
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parser.add_argument('--to', nargs=1,
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required=True,
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help='The destination IP address')
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parser.add_argument('--debug',
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required=False, action='store_true',
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help='Enable test debugging')
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args = parser.parse_args()
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# Start sniffing on recvif
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sniffer = Sniffer(args, check_icmp6_error)
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########################################################################
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#
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# A single start fragment with zero length IPv6 header (jumbo).
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# Make sure we do hit the Fragment case, which is tricky as the
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# jumbogram needs to be > 64k.
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#
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# A: Jumbo-Fragment not allowed.
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# R: ICMPv6 param problem.
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#
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#data = "6" * (65536 - 2 - 6 - 8 - 8)
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data = "6" * 65512
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ip6f01 = sp.Ether() / \
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sp.IPv6(src=args.src[0], dst=args.to[0], plen=0) / \
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sp.IPv6ExtHdrHopByHop(options=sp.Jumbo(jumboplen=65536)) / \
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sp.IPv6ExtHdrFragment(offset=0, m=1, id=6) / \
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sp.UDP(dport=3456, sport=6543) / \
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data
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if args.debug :
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ip6f01.display()
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sp.sendp(ip6f01, iface=args.sendif[0], verbose=False)
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# We should only need to sleep 0.10 but it seems scapy
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# takes time for this one.
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sleep(75)
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sniffer.setEnd()
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sniffer.join()
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if not sniffer.foundCorrectPacket:
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sys.exit(1)
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sys.exit(0)
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if __name__ == '__main__':
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main()
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