forked from osmocom/wireshark
118 lines
4.9 KiB
C
118 lines
4.9 KiB
C
/** @file
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* Declaration of CRC-32 tvbuff routines
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __CRC32_TVB_H__
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#define __CRC32_TVB_H__
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#include "ws_symbol_export.h"
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/** Compute CRC32 CCITT checksum of a tv buffer.
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@param tvb The tv buffer containing the data.
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@param len The number of bytes to include in the computation.
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@return The CRC32 CCITT checksum. */
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WS_DLL_PUBLIC guint32 crc32_ccitt_tvb(tvbuff_t *tvb, guint len);
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/** Compute CRC32 CCITT checksum of a tv buffer.
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@return The CRC32 CCITT checksum. */
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WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
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/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
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* checksum over multiple tv buffers and you want to feed the partial CRC32
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* back in, remember to take the 1's complement of the partial CRC32 first.
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@param tvb The tv buffer containing the data.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32 CCITT checksum (using the given seed). */
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WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed);
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/** Compute CRC32C checksum of a tv buffer. If computing the
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* checksum over multiple tv buffers and you want to feed the partial CRC32
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* back in, remember to take the 1's complement of the partial CRC32 first.
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32C checksum (using the given seed). */
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WS_DLL_PUBLIC guint32 crc32c_tvb_offset_calculate(tvbuff_t *tvb, guint offset,
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guint len, guint32 seed);
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/** Compute CRC32 CCITT checksum of a tv buffer. If computing the
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* checksum over multiple tv buffers and you want to feed the partial CRC32
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* back in, remember to take the 1's complement of the partial CRC32 first.
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32 CCITT checksum (using the given seed). */
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WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset,
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guint len, guint32 seed);
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/** Compute IEEE 802.x CRC32 checksum of a tv buffer.
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@param tvb The tv buffer containing the data.
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@param len The number of bytes to include in the computation.
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@return The IEEE 802.x CRC32 checksum. */
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WS_DLL_PUBLIC guint32 crc32_802_tvb(tvbuff_t *tvb, guint len);
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/** Compute MPEG-2 CRC32 checksum of a tv buffer.
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@param tvb The tv buffer containing the data.
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@param len The number of bytes to include in the computation.
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@return The MPEG-2 CRC32 checksum. */
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WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb(tvbuff_t *tvb, guint len);
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/** Compute MPEG-2 CRC32 checksum of a tv buffer.
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@return The MPEG-2 CRC32 checksum. */
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WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
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/** Compute MPEG-2 CRC32 checksum of a buffer of data.
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@param tvb The tv buffer containing the data.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32 MPEG-2 checksum (using the given seed). */
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WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed);
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/** Compute MPEG-2 CRC32 checksum of a buffer of data.
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32 MPEG-2 checksum (using the given seed). */
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WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_offset_seed(tvbuff_t *tvb, guint offset,
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guint len, guint32 seed);
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/** Compute CRC32 checksum of a tv buffer using the parameters
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* Width = 32 bits
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* Poly = 0x0AA725CF
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* Reflection = true
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* Algorithm = table-driven
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@param tvb The tv buffer containing the data.
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@param offset The offset into the tv buffer.
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@param len The number of bytes to include in the computation.
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@param seed The seed to use.
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@return The CRC32 checksum. */
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WS_DLL_PUBLIC guint32 crc32_0x0AA725CF_tvb_offset_seed(tvbuff_t *tvb,
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guint offset, guint len, guint32 seed);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* crc32-tvb.h */
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