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tests/sys/net/stp.py
- This file was added.
#!/usr/bin/env python3 | |||||
# | |||||
# SPDX-License-Identifier: BSD-2-Clause | |||||
# | |||||
# Copyright (c) 2021 Kristof Provost <kp@FreeBSD.org> | |||||
# | |||||
# 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. | |||||
# | |||||
import argparse | |||||
import scapy.all as sp | |||||
import sys | |||||
import os | |||||
curdir = os.path.dirname(os.path.realpath(__file__)) | |||||
netpfil_common = curdir + "/../netpfil/common" | |||||
sys.path.append(netpfil_common) | |||||
from sniffer import Sniffer | |||||
def check_stp(args, packet): | |||||
stp = packet.getlayer(sp.STP) | |||||
if stp is None: | |||||
return False | |||||
if stp.rootmac != "00:0c:29:01:01:01": | |||||
return False | |||||
print("This packet should have been dropped") | |||||
print(packet.show()) | |||||
return True | |||||
def invalid_stp(send_if): | |||||
llc = sp.Ether(src="00:0c:29:0b:91:0a", dst="01:80:C2:00:00:00") \ | |||||
/ sp.LLC() | |||||
# Bad maxage | |||||
stp = llc / sp.STP(proto=0, rootid=32768, rootmac="00:0c:29:01:01:01", \ | |||||
bridgeid=32768, bridgemac="00:0c:29:01:01:01", \ | |||||
portid=0x8007, maxage=50, hellotime=2, fwddelay=30) | |||||
sp.sendp(stp, iface=send_if, verbose=False) | |||||
# Bad hellotime | |||||
stp = llc / sp.STP(proto=0, rootid=32768, rootmac="00:0c:29:01:01:01", \ | |||||
bridgeid=32768, bridgemac="00:0c:29:01:01:01", \ | |||||
portid=0x8007, maxage=40, hellotime=3, fwddelay=30) | |||||
sp.sendp(stp, iface=send_if, verbose=False) | |||||
# Bad fwddelay | |||||
stp = llc / sp.STP(proto=0, rootid=32768, rootmac="00:0c:29:01:01:01", \ | |||||
bridgeid=32768, bridgemac="00:0c:29:01:01:01", \ | |||||
portid=0x8007, maxage=40, hellotime=2, fwddelay=40) | |||||
sp.sendp(stp, iface=send_if, verbose=False) | |||||
def main(): | |||||
parser = argparse.ArgumentParser("stp.py", | |||||
description="STP test tool") | |||||
parser.add_argument('--sendif', nargs=1, | |||||
required=True, | |||||
help='The interface through which the packet(s) will be sent') | |||||
parser.add_argument('--recvif', nargs=1, | |||||
help='The interface on which to expect the ICMP echo request') | |||||
args = parser.parse_args() | |||||
sniffer = Sniffer(args, check_stp) | |||||
invalid_stp(args.sendif[0]) | |||||
sniffer.join() | |||||
# The 'correct' packet is a corrupt STP packet, so it shouldn't turn up. | |||||
if sniffer.foundCorrectPacket: | |||||
sys.exit(1) | |||||
if __name__ == '__main__': | |||||
main() |