3 # SPDX-License-Identifier: BSD-2-Clause
5 # Copyright (c) 2021 Rubicon Communications, LLC (Netgate).
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
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30 logging.getLogger("scapy").setLevel(logging.CRITICAL)
31 import scapy.all as sp
34 curdir = os.path.dirname(os.path.realpath(__file__))
35 netpfil_common = curdir + "/../netpfil/common"
36 sys.path.append(netpfil_common)
37 from sniffer import Sniffer
39 def check_pcp(args, packet):
40 vlan = packet.getlayer(sp.Dot1Q)
45 if not packet.getlayer(sp.BOOTP):
48 if vlan.prio == int(args.expect_pcp[0]):
54 parser = argparse.ArgumentParser("pcp.py",
55 description="PCP test tool")
56 parser.add_argument('--recvif', nargs=1,
58 help='The interface where to look for packets to check')
59 parser.add_argument('--expect-pcp', nargs=1,
60 help='The expected PCP value on VLAN packets')
62 args = parser.parse_args()
64 sniffer = Sniffer(args, check_pcp, recvif=args.recvif[0], timeout=20)
68 if sniffer.foundCorrectPacket:
73 if __name__ == '__main__':