40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/** @file
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*
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* Checks the checksum (FCS) of the 3G TS 27.010 Multiplexing protocol.
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* The algorithm to check the FCS is described in "3G TS 27.010 V2.0.0 (1999-06)"
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* See: www.3gpp.org/ftp/tsg_t/TSG_T/TSGT_04/docs/PDFs/TP-99119.pdf
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* or: http://www.3gpp.org/ftp/Specs/html-info/27010.htm
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*
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* Polynom: (x^8 + x^2 + x^1 + 1)
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*
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* 2011 Hans-Christoph Schemmel <hans-christoph.schemmel[AT]cinterion.com>
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* 2014 Philip Rosenberg-Watt <p.rosenberg-watt[at]cablelabs.com>
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* + Added CRC-8 for IEEE 802.3 EPON, with shift register initialized to 0x00
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* See IEEE Std 802.3-2012 Section 5, Clause 65.1.3.2.3.
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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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/**
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* Check the final crc value(Receiver code)
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*
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* \param p The tv buffer containing the data.
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* \param len Number of bytes in the message.
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* \param offset Offset in the message.
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* \param received_fcs The received FCS.
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* \return Returns TRUE if the checksum is correct, FALSE if it is not correct
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*****************************************************************************/
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#ifndef __CRC8_TVB_H__
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#define __CRC8_TVB_H__
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extern gboolean check_fcs(tvbuff_t *p, guint8 len, guint8 offset, guint8 received_fcs);
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extern guint8 get_crc8_ieee8023_epon(tvbuff_t *p, guint8 len, guint8 offset);
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#endif /* __CRC8_TVB_H__ */
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