epan/crc8-tvb.h

   1 /* crc8.h
   2  *
   3  * Checks the checksum (FCS) of the 3G TS 27.010 Multiplexing protocol.
   4  * The algorithm to check the FCS is described in "3G TS 27.010 V2.0.0 (1999-06)"
   5  * See: www.3gpp.org/ftp/tsg_t/TSG_T/TSGT_04/docs/PDFs/TP-99119.pdf
   6  * or: http://www.3gpp.org/ftp/Specs/html-info/27010.htm
   7  *
   8  * Polynom: (x^8 + x^2 + x^1 + 1)
   9  *
  10  * 2011 Hans-Christoph Schemmel <hans-christoph.schemmel[AT]cinterion.com>
  11  *
  12  *
  13  * $Id$
  14  *
  15  * Wireshark - Network traffic analyzer
  16  * By Gerald Combs <gerald@wireshark.org>
  17  * Copyright 1998 Gerald Combs
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License
  21  * as published by the Free Software Foundation; either version 2
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  32  */
  33
  34
  35 /**
  36  * Check the final crc value(Receiver code)
  37  *
  38  * \param p The tv buffer containing the data.
  39  * \param len Number of bytes in the message.
  40  * \param offset Offset in the message.
  41  * \param received_fcs The received FCS.
  42  * \return     Returns TRUE if the checksum is correct, FALSE if it is not correct
  43  *****************************************************************************/
  44
  45 #ifndef __CRC8_TVB_H__
  46 #define __CRC8_TVB_H__
  47
  48 extern gboolean check_fcs(tvbuff_t *p, guint8 len, guint8 offset, guint8 received_fcs);
  49
  50 #endif /* __CRC8_TVB_H__ */