crc16-tvb.h File Reference

#include "ws_symbol_export.h"

Go to the source code of this file.

Functions
WS_DLL_PUBLIC uint16_t	crc16_ccitt_tvb (tvbuff_t *tvb, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_x25_ccitt_tvb (tvbuff_t *tvb, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_r3_ccitt_tvb (tvbuff_t *tvb, int offset, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_ccitt_tvb_offset (tvbuff_t *tvb, unsigned offset, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_ccitt_tvb_seed (tvbuff_t *tvb, unsigned len, uint16_t seed)
WS_DLL_PUBLIC uint16_t	crc16_ccitt_tvb_offset_seed (tvbuff_t *tvb, unsigned offset, unsigned len, uint16_t seed)
WS_DLL_PUBLIC uint16_t	crc16_iso14443a_tvb_offset (tvbuff_t *tvb, unsigned offset, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_usb_tvb_offset (tvbuff_t *tvb, unsigned offset, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_plain_tvb_offset (tvbuff_t *tvb, unsigned offset, unsigned len)
WS_DLL_PUBLIC uint16_t	crc16_plain_tvb_offset_seed (tvbuff_t *tvb, unsigned offset, unsigned len, uint16_t crc)
WS_DLL_PUBLIC uint16_t	crc16_0x9949_tvb_offset_seed (tvbuff_t *tvb, unsigned offset, unsigned len, uint16_t seed)
WS_DLL_PUBLIC uint16_t	crc16_0x3D65_tvb_offset_seed (tvbuff_t *tvb, unsigned offset, unsigned len, uint16_t seed)

Detailed Description

Declaration of CRC-16 tvbuff routines

2004 Richard van der Hoff richa.nosp@m.rdv@.nosp@m.mxtel.nosp@m.ecom.nosp@m..com

Wireshark - Network traffic analyzer By Gerald Combs geral.nosp@m.d@wi.nosp@m.resha.nosp@m.rk.o.nosp@m.rg Copyright 1998 Gerald Combs

SPDX-License-Identifier: GPL-2.0-or-later

Function Documentation

crc16_0x3D65_tvb_offset_seed()

WS_DLL_PUBLIC uint16_t crc16_0x3D65_tvb_offset_seed	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len,
		uint16_t	seed
	)

Compute CRC16 checksum of a tv buffer using the parameters Width = 16 bits Poly = 0x3D65 Reflection = true Algorithm = table-driven

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.
seed	The seed to use.

Returns

The CRC16 checksum.

crc16_0x9949_tvb_offset_seed()

WS_DLL_PUBLIC uint16_t crc16_0x9949_tvb_offset_seed	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len,
		uint16_t	seed
	)

Compute CRC16 checksum of a tv buffer using the parameters Width = 16 bits Poly = 0x9949 Reflection = true Algorithm = table-driven

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.
seed	The seed to use.

Returns

The CRC16 checksum.

crc16_ccitt_tvb()

WS_DLL_PUBLIC uint16_t crc16_ccitt_tvb	(	tvbuff_t *	tvb,
		unsigned	len
	)

Compute CRC16 CCITT checksum of a tv buffer.

Parameters

tvb	The tv buffer containing the data.
len	The number of bytes to include in the computation.

Returns

The CRC16 CCITT checksum.

crc16_ccitt_tvb_offset()

WS_DLL_PUBLIC uint16_t crc16_ccitt_tvb_offset	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len
	)

Compute CRC16 CCITT checksum of a tv buffer.

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.

Returns

The CRC16 CCITT checksum.

crc16_ccitt_tvb_offset_seed()

WS_DLL_PUBLIC uint16_t crc16_ccitt_tvb_offset_seed	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len,
		uint16_t	seed
	)

Compute CRC16 CCITT checksum of a tv buffer. If computing the checksum over multiple tv buffers and you want to feed the partial CRC16 back in, remember to take the 1's complement of the partial CRC16 first.

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.
seed	The seed to use.

Returns

The CRC16 CCITT checksum (using the given seed).

crc16_ccitt_tvb_seed()

WS_DLL_PUBLIC uint16_t crc16_ccitt_tvb_seed	(	tvbuff_t *	tvb,
		unsigned	len,
		uint16_t	seed
	)

Compute CRC16 CCITT checksum of a tv buffer. If computing the checksum over multiple tv buffers and you want to feed the partial CRC16 back in, remember to take the 1's complement of the partial CRC16 first.

Parameters

tvb	The tv buffer containing the data.
len	The number of bytes to include in the computation.
seed	The seed to use.

Returns

The CRC16 CCITT checksum (using the given seed).

crc16_iso14443a_tvb_offset()

WS_DLL_PUBLIC uint16_t crc16_iso14443a_tvb_offset	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len
	)

Compute the 16bit CRC_A value of a tv buffer as defined in ISO14443-3.

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.

Returns

The calculated CRC_A.

crc16_plain_tvb_offset()

WS_DLL_PUBLIC uint16_t crc16_plain_tvb_offset	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len
	)

Compute the "plain" CRC16 checksum of a tv buffer using the following parameters: Width = 16 Poly = 0x8005 XorIn = 0x0000 ReflectIn = True XorOut = 0x0000 ReflectOut = True Algorithm = table-driven Direct = True

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.

Returns

The CRC16 checksum.

crc16_plain_tvb_offset_seed()

WS_DLL_PUBLIC uint16_t crc16_plain_tvb_offset_seed	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len,
		uint16_t	crc
	)

Compute the "plain" CRC16 checksum of a tv buffer using the following parameters: Width = 16 Poly = 0x8005 XorIn = 0x0000 ReflectIn = True XorOut = 0x0000 ReflectOut = True Algorithm = table-driven Direct = True

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.
crc	Starting CRC value

Returns

The CRC16 checksum.

crc16_r3_ccitt_tvb()

WS_DLL_PUBLIC uint16_t crc16_r3_ccitt_tvb	(	tvbuff_t *	tvb,
		int	offset,
		unsigned	len
	)

Compute CRC16 ASSA R3 CCITT checksum of a tv buffer.

Parameters

tvb	The tv buffer containing the data.
offset	The offset into tv buffer containing the data.
len	The number of bytes to include in the computation.

Returns

The CRC16 X.25 CCITT checksum.

crc16_usb_tvb_offset()

WS_DLL_PUBLIC uint16_t crc16_usb_tvb_offset	(	tvbuff_t *	tvb,
		unsigned	offset,
		unsigned	len
	)

Compute the 16bit CRC value of a tv buffer as defined in USB Standard.

Parameters

tvb	The tv buffer containing the data.
offset	The offset into the tv buffer.
len	The number of bytes to include in the computation.

Returns

The calculated CRC.

crc16_x25_ccitt_tvb()

WS_DLL_PUBLIC uint16_t crc16_x25_ccitt_tvb	(	tvbuff_t *	tvb,
		unsigned	len
	)

Compute CRC16 X.25 CCITT checksum of a tv buffer.

Parameters

tvb	The tv buffer containing the data.
len	The number of bytes to include in the computation.

Returns

The CRC16 X.25 CCITT checksum.