75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
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#!/usr/bin/env python3
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2021 Rubicon Communications, LLC (Netgate).
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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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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 sys
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import os
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curdir = os.path.dirname(os.path.realpath(__file__))
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netpfil_common = curdir + "/../netpfil/common"
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sys.path.append(netpfil_common)
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from sniffer import Sniffer
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def check_pcp(args, packet):
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vlan = packet.getlayer(sp.Dot1Q)
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if vlan is None:
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return False
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if not packet.getlayer(sp.BOOTP):
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return False
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if vlan.prio == int(args.expect_pcp[0]):
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return True
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return False
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def main():
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parser = argparse.ArgumentParser("pcp.py",
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description="PCP test tool")
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parser.add_argument('--recvif', nargs=1,
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required=True,
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help='The interface where to look for packets to check')
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parser.add_argument('--expect-pcp', nargs=1,
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help='The expected PCP value on VLAN packets')
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args = parser.parse_args()
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sniffer = Sniffer(args, check_pcp, recvif=args.recvif[0], timeout=20)
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sniffer.join()
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if sniffer.foundCorrectPacket:
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sys.exit(0)
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sys.exit(1)
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if __name__ == '__main__':
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main()
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