1 /*
2 * Copyright (c) 2022, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file includes implementation of `FrameData`.
32 */
33
34 #include "frame_data.hpp"
35
36 #include "common/code_utils.hpp"
37 #include "common/encoding.hpp"
38
39 namespace ot {
40
ReadUint8(uint8_t & aUint8)41 Error FrameData::ReadUint8(uint8_t &aUint8) { return ReadBytes(&aUint8, sizeof(uint8_t)); }
42
ReadBigEndianUint16(uint16_t & aUint16)43 Error FrameData::ReadBigEndianUint16(uint16_t &aUint16)
44 {
45 Error error;
46
47 SuccessOrExit(error = ReadBytes(&aUint16, sizeof(uint16_t)));
48 aUint16 = Encoding::BigEndian::HostSwap16(aUint16);
49
50 exit:
51 return error;
52 }
53
ReadBigEndianUint32(uint32_t & aUint32)54 Error FrameData::ReadBigEndianUint32(uint32_t &aUint32)
55 {
56 Error error;
57
58 SuccessOrExit(error = ReadBytes(&aUint32, sizeof(uint32_t)));
59 aUint32 = Encoding::BigEndian::HostSwap32(aUint32);
60
61 exit:
62 return error;
63 }
64
ReadLittleEndianUint16(uint16_t & aUint16)65 Error FrameData::ReadLittleEndianUint16(uint16_t &aUint16)
66 {
67 Error error;
68
69 SuccessOrExit(error = ReadBytes(&aUint16, sizeof(uint16_t)));
70 aUint16 = Encoding::LittleEndian::HostSwap16(aUint16);
71
72 exit:
73 return error;
74 }
75
ReadLittleEndianUint32(uint32_t & aUint32)76 Error FrameData::ReadLittleEndianUint32(uint32_t &aUint32)
77 {
78 Error error;
79
80 SuccessOrExit(error = ReadBytes(&aUint32, sizeof(uint32_t)));
81 aUint32 = Encoding::LittleEndian::HostSwap32(aUint32);
82
83 exit:
84 return error;
85 }
86
ReadBytes(void * aBuffer,uint16_t aLength)87 Error FrameData::ReadBytes(void *aBuffer, uint16_t aLength)
88 {
89 Error error = kErrorNone;
90
91 VerifyOrExit(CanRead(aLength), error = kErrorParse);
92 memcpy(aBuffer, GetBytes(), aLength);
93 SkipOver(aLength);
94
95 exit:
96 return error;
97 }
98
SkipOver(uint16_t aLength)99 void FrameData::SkipOver(uint16_t aLength) { Init(GetBytes() + aLength, GetLength() - aLength); }
100
101 } // namespace ot
102
