freebsd-dev/tests/sys/netinet6/frag6/frag6_01.py
Kristof Provost a26e895f3d tests: Only log critical errors from scapy
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")
2021-05-12 20:54:30 +02:00

118 lines
3.7 KiB
Python

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