| [21580dd] | 1 | /*
|
|---|
| 2 | * Copyright (c) 2009 Lukas Mejdrech
|
|---|
| 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
|
|---|
| 7 | * are 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 copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT 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 OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| [8d601db] | 29 | /** @addtogroup libnet
|
|---|
| 30 | * @{
|
|---|
| [21580dd] | 31 | */
|
|---|
| 32 |
|
|---|
| 33 | /** @file
|
|---|
| [8d601db] | 34 | * General CRC and checksum computation.
|
|---|
| [21580dd] | 35 | */
|
|---|
| 36 |
|
|---|
| [8d601db] | 37 | #ifndef LIBNET_CHECKSUM_H_
|
|---|
| 38 | #define LIBNET_CHECKSUM_H_
|
|---|
| [21580dd] | 39 |
|
|---|
| 40 | #include <byteorder.h>
|
|---|
| 41 | #include <sys/types.h>
|
|---|
| 42 |
|
|---|
| [918e9910] | 43 | /** IP checksum value for computed zero checksum.
|
|---|
| [8d601db] | 44 | * Zero is returned as 0xFFFF (not flipped)
|
|---|
| [918e9910] | 45 | */
|
|---|
| [8d601db] | 46 | #define IP_CHECKSUM_ZERO 0xffffU
|
|---|
| [918e9910] | 47 |
|
|---|
| [21580dd] | 48 | #ifdef ARCH_IS_BIG_ENDIAN
|
|---|
| [8d601db] | 49 | #define compute_crc32(seed, data, length) \
|
|---|
| 50 | compute_crc32_be(seed, (uint8_t *) data, length)
|
|---|
| [21580dd] | 51 | #else
|
|---|
| [8d601db] | 52 | #define compute_crc32(seed, data, length) \
|
|---|
| 53 | compute_crc32_le(seed, (uint8_t *) data, length)
|
|---|
| [21580dd] | 54 | #endif
|
|---|
| 55 |
|
|---|
| [8d601db] | 56 | extern uint32_t compute_crc32_le(uint32_t, uint8_t *, size_t);
|
|---|
| 57 | extern uint32_t compute_crc32_be(uint32_t, uint8_t *, size_t);
|
|---|
| 58 | extern uint32_t compute_checksum(uint32_t, uint8_t *, size_t);
|
|---|
| 59 | extern uint16_t compact_checksum(uint32_t);
|
|---|
| 60 | extern uint16_t flip_checksum(uint16_t);
|
|---|
| 61 | extern uint16_t ip_checksum(uint8_t *, size_t);
|
|---|
| [21580dd] | 62 |
|
|---|
| 63 | #endif
|
|---|
| 64 |
|
|---|
| 65 | /** @}
|
|---|
| 66 | */
|
|---|
