1#!/usr/bin/env python3
2#
3#  Copyright (c) 2019, The OpenThread Authors.
4#  All rights reserved.
5#
6#  Redistribution and use in source and binary forms, with or without
7#  modification, are permitted provided that the following conditions are met:
8#  1. Redistributions of source code must retain the above copyright
9#     notice, this list of conditions and the following disclaimer.
10#  2. Redistributions in binary form must reproduce the above copyright
11#     notice, this list of conditions and the following disclaimer in the
12#     documentation and/or other materials provided with the distribution.
13#  3. Neither the name of the copyright holder nor the
14#     names of its contributors may be used to endorse or promote products
15#     derived from this software without specific prior written permission.
16#
17#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27#  POSSIBILITY OF SUCH DAMAGE.
28#
29
30
31class Error(Exception):
32    """
33    Base error class for all Packet Verification errors.
34    """
35    pass
36
37
38class PacketNotFound(Error):
39    """
40    Represents an error that the packet was not found.
41    """
42
43    def __init__(self, start_index, stop_index):
44        self._start_index = start_index
45        self._stop_index = stop_index
46
47
48class UnexpectedPacketFound(Error):
49    """
50    Represents an error that the packet was found unexpectedly.
51    """
52
53    def __init__(self, idx, pkt):
54        self._idx = idx
55        self._pkt = pkt
56
57
58class VerifyFailed(Error):
59    """
60    Represents an error that the packet failed to pass verification criteria.
61    """
62
63    def __init__(self, pkt):
64        self._pkt = pkt
65