/* crc8.h * * 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 * 2014 Philip Rosenberg-Watt * + 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 * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /** * Check the final crc value(Receiver code) * * \param p The tv buffer containing the data. * \param len Number of bytes in the message. * \param offset Offset in the message. * \param received_fcs The received FCS. * \return Returns TRUE if the checksum is correct, FALSE if it is not correct *****************************************************************************/ #ifndef __CRC8_TVB_H__ #define __CRC8_TVB_H__ extern gboolean check_fcs(tvbuff_t *p, guint8 len, guint8 offset, guint8 received_fcs); extern guint8 get_crc8_ieee8023_epon(tvbuff_t *p, guint8 len, guint8 offset); #endif /* __CRC8_TVB_H__ */