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/** @file
* Declaration of CRC-32 tvbuff routines
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __CRC32_TVB_H__
#define __CRC32_TVB_H__
#include "ws_symbol_export.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/** Compute CRC32 CCITT checksum of a tv buffer.
@param tvb The tv buffer containing the data.
@param len The number of bytes to include in the computation.
@return The CRC32 CCITT checksum. */
WS_DLL_PUBLIC uint32_t crc32_ccitt_tvb(tvbuff_t *tvb, unsigned len);
/** Compute CRC32 CCITT checksum of a tv buffer.
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@return The CRC32 CCITT checksum. */
WS_DLL_PUBLIC uint32_t crc32_ccitt_tvb_offset(tvbuff_t *tvb, unsigned offset, unsigned len);
/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
* checksum over multiple tv buffers and you want to feed the partial CRC32
* back in, remember to take the 1's complement of the partial CRC32 first.
@param tvb The tv buffer containing the data.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 CCITT checksum (using the given seed). */
WS_DLL_PUBLIC uint32_t crc32_ccitt_tvb_seed(tvbuff_t *tvb, unsigned len, uint32_t seed);
/** Compute CRC32C checksum of a tv buffer. If computing the
* checksum over multiple tv buffers and you want to feed the partial CRC32
* back in, remember to take the 1's complement of the partial CRC32 first.
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32C checksum (using the given seed). */
WS_DLL_PUBLIC uint32_t crc32c_tvb_offset_calculate(tvbuff_t *tvb, unsigned offset,
unsigned len, uint32_t seed);
/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
* checksum over multiple tv buffers and you want to feed the partial CRC32
* back in, remember to take the 1's complement of the partial CRC32 first.
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 CCITT checksum (using the given seed). */
WS_DLL_PUBLIC uint32_t crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, unsigned offset,
unsigned len, uint32_t seed);
/** Compute IEEE 802.x CRC32 checksum of a tv buffer.
@param tvb The tv buffer containing the data.
@param len The number of bytes to include in the computation.
@return The IEEE 802.x CRC32 checksum. */
WS_DLL_PUBLIC uint32_t crc32_802_tvb(tvbuff_t *tvb, unsigned len);
/** Compute MPEG-2 CRC32 checksum of a tv buffer.
@param tvb The tv buffer containing the data.
@param len The number of bytes to include in the computation.
@return The MPEG-2 CRC32 checksum. */
WS_DLL_PUBLIC uint32_t crc32_mpeg2_tvb(tvbuff_t *tvb, unsigned len);
/** Compute MPEG-2 CRC32 checksum of a tv buffer.
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@return The MPEG-2 CRC32 checksum. */
WS_DLL_PUBLIC uint32_t crc32_mpeg2_tvb_offset(tvbuff_t *tvb, unsigned offset, unsigned len);
/** Compute MPEG-2 CRC32 checksum of a buffer of data.
@param tvb The tv buffer containing the data.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 MPEG-2 checksum (using the given seed). */
WS_DLL_PUBLIC uint32_t crc32_mpeg2_tvb_seed(tvbuff_t *tvb, unsigned len, uint32_t seed);
/** Compute MPEG-2 CRC32 checksum of a buffer of data.
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 MPEG-2 checksum (using the given seed). */
WS_DLL_PUBLIC uint32_t crc32_mpeg2_tvb_offset_seed(tvbuff_t *tvb, unsigned offset,
unsigned len, uint32_t seed);
/** Compute CRC32 checksum of a tv buffer using the parameters
* Width = 32 bits
* Poly = 0x0AA725CF
* Reflection = true
* Algorithm = table-driven
@param tvb The tv buffer containing the data.
@param offset The offset into the tv buffer.
@param len The number of bytes to include in the computation.
@param seed The seed to use.
@return The CRC32 checksum. */
WS_DLL_PUBLIC uint32_t crc32_0x0AA725CF_tvb_offset_seed(tvbuff_t *tvb,
unsigned offset, unsigned len, uint32_t seed);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* crc32-tvb.h */
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