libtins 4.5
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checksum_utils.h
1/*
2 * Copyright (c) 2017, Matias Fontanini
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
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29
30#ifndef TINS_CHECKSUM_UTILS_H
31#define TINS_CHECKSUM_UTILS_H
32
33#include <stdint.h>
34#include <tins/macros.h>
35
36namespace Tins {
37
38class IPv4Address;
39class IPv6Address;
40
41namespace Utils {
42
53TINS_API uint32_t do_checksum(const uint8_t* start, const uint8_t* end);
54
65TINS_API uint16_t sum_range(const uint8_t* start, const uint8_t* end);
66
76TINS_API uint32_t pseudoheader_checksum(IPv4Address source_ip,
77 IPv4Address dest_ip,
78 uint16_t len,
79 uint16_t flag);
80
90TINS_API uint32_t pseudoheader_checksum(IPv6Address source_ip,
91 IPv6Address dest_ip,
92 uint16_t len,
93 uint16_t flag);
94
101TINS_API uint32_t crc32(const uint8_t* data, uint32_t data_size);
102
103} // Utils
104} // Tins
105
106#endif // TINS_CHECKSUM_UTILS_H
TINS_API uint16_t sum_range(const uint8_t *start, const uint8_t *end)
Computes the 16 bit sum of the input buffer.
Definition checksum_utils.cpp:49
TINS_API uint32_t pseudoheader_checksum(IPv4Address source_ip, IPv4Address dest_ip, uint16_t len, uint16_t flag)
Performs the pseudo header checksum used in TCP and UDP PDUs.
Definition checksum_utils.cpp:94
TINS_API uint32_t crc32(const uint8_t *data, uint32_t data_size)
Returns the 32 bit crc of the given buffer.
Definition checksum_utils.cpp:112
TINS_API uint32_t do_checksum(const uint8_t *start, const uint8_t *end)
Does the 16 bits sum of all 2 bytes elements between start and end.
Definition checksum_utils.cpp:45
The Tins namespace.
Definition address_range.h:38