forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Skipping dissectors dir for now. Change-Id: I717b66bfbc7cc81b83f8c2cbc011fcad643796aa Reviewed-on: https://code.wireshark.org/review/25694 Petri-Dish: Dario Lombardo <lomato@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
137 lines
5.3 KiB
C
137 lines
5.3 KiB
C
/* crc16-tvb.h
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* Declaration of CRC-16 tvbuff routines
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*
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* 2004 Richard van der Hoff <richardv@mxtelecom.com>
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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 __CRC16_TVB_H__
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#define __CRC16_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 CRC16 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 CRC16 CCITT checksum. */
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WS_DLL_PUBLIC guint16 crc16_ccitt_tvb(tvbuff_t *tvb, guint len);
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/** Compute CRC16 X.25 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 CRC16 X.25 CCITT checksum. */
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WS_DLL_PUBLIC guint16 crc16_x25_ccitt_tvb(tvbuff_t *tvb, guint len);
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/** Compute CRC16 ASSA R3 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 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 CRC16 X.25 CCITT checksum. */
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WS_DLL_PUBLIC guint16 crc16_r3_ccitt_tvb(tvbuff_t *tvb, int offset, guint len);
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/** Compute CRC16 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 CRC16 CCITT checksum. */
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WS_DLL_PUBLIC guint16 crc16_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
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/** Compute CRC16 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 CRC16
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* back in, remember to take the 1's complement of the partial CRC16 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 CRC16 CCITT checksum (using the given seed). */
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WS_DLL_PUBLIC guint16 crc16_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint16 seed);
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/** Compute CRC16 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 CRC16
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* back in, remember to take the 1's complement of the partial CRC16 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 CRC16 CCITT checksum (using the given seed). */
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WS_DLL_PUBLIC guint16 crc16_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset,
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guint len, guint16 seed);
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/** Compute the 16bit CRC_A value of a tv buffer as defined in ISO14443-3.
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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 calculated CRC_A. */
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WS_DLL_PUBLIC guint16 crc16_iso14443a_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
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/** Compute the "plain" CRC16 checksum of a tv buffer using the following
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* parameters:
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* Width = 16
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* Poly = 0x8005
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* XorIn = 0x0000
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* ReflectIn = True
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* XorOut = 0x0000
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* ReflectOut = True
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* Algorithm = table-driven
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* Direct = True
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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 CRC16 checksum. */
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WS_DLL_PUBLIC guint16 crc16_plain_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
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/** Compute the "plain" CRC16 checksum of a tv buffer using the following
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* parameters:
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* Width = 16
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* Poly = 0x8005
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* XorIn = 0x0000
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* ReflectIn = True
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* XorOut = 0x0000
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* ReflectOut = True
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* Algorithm = table-driven
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* Direct = True
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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 crc Starting CRC value
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@return The CRC16 checksum. */
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WS_DLL_PUBLIC guint16 crc16_plain_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint16 crc);
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/** Compute CRC16 checksum of a tv buffer using the parameters
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* Width = 16 bits
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* Poly = 0x9949
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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 CRC16 checksum. */
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WS_DLL_PUBLIC guint16 crc16_0x9949_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint16 seed);
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/** Compute CRC16 checksum of a tv buffer using the parameters
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* Width = 16 bits
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* Poly = 0x3D65
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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 CRC16 checksum. */
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WS_DLL_PUBLIC guint16 crc16_0x3D65_tvb_offset_seed(tvbuff_t *tvb, guint offset, guint len, guint16 seed);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* crc16-tvb.h */
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