crc8-tvb.h File Reference

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Functions
bool	check_fcs (tvbuff_t *p, uint8_t len, uint8_t offset, uint8_t received_fcs)
WS_DLL_PUBLIC uint8_t	get_crc8_ieee8023_epon (tvbuff_t *p, uint8_t len, uint8_t offset)
	Calculate CRC-8 IEEE 802.3 EoN for a given TVB buffer.

Detailed Description

Checks the checksum (FCS) of the 3G TS 27.010 Multiplexing protocol. The algorithm to check the FCS is described in "3G TS 27.010 V2.0.0 (1999-06)" See: www.3gpp.org/ftp/tsg_t/TSG_T/TSGT_04/docs/PDFs/TP-99119.pdf or: http://www.3gpp.org/ftp/Specs/html-info/27010.htm

Polynom: (x^8 + x^2 + x^1 + 1)

2011 Hans-Christoph Schemmel <hans-christoph.schemmel[AT]cinterion.com> 2014 Philip Rosenberg-Watt <p.rosenberg-watt[at]cablelabs.com>

• Added CRC-8 for IEEE 802.3 EPON, with shift register initialized to 0x00 See IEEE Std 802.3-2012 Section 5, Clause 65.1.3.2.3.

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

check_fcs()

bool check_fcs ( tvbuff_t *  p, uint8_t  len, uint8_t  offset, uint8_t  received_fcs  )

extern

Check the final crc value(Receiver code)

Parameters

p	The tv buffer containing the data.
len	Number of bytes in the message.
offset	Offset in the message.
received_fcs	The received FCS.

Returns

Returns true if the checksum is correct, false if it is not correct

get_crc8_ieee8023_epon()

WS_DLL_PUBLIC uint8_t get_crc8_ieee8023_epon	(	tvbuff_t *	p,
		uint8_t	len,
		uint8_t	offset
	)

Calculate CRC-8 IEEE 802.3 EoN for a given TVB buffer.

This function computes the CRC-8 value using the IEEE 802.3 Extended On-The-Network (EoN) algorithm.

Parameters

p	Pointer to the TVB buffer containing the data to be processed.
len	Length of the data in the TVB buffer.
offset	Offset within the TVB buffer where the data starts.

Returns

uint8_t The calculated CRC-8 value.