forked from osmocom/wireshark
40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/* crc16.h
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* Declaration of CRC-16 routines and table
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*
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* 2004 Richard van der Hoff <richardv@mxtelecom.com>
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*
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* $Id: crc16.h,v 1.1 2004/06/25 06:31:46 sahlberg Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@xxxxxxxxxxxx>
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* Copyright 1998 Gerald Combs
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*
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* Copied from README.developer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* Calculate the CCITT/ITU/CRC-16 16-bit CRC
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(parameters for this CRC are:
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Polynomial: x^16 + x^12 + x^5 + 1 (0x1021);
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Start value 0xFFFF;
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XOR result with 0xFFFF;
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First bit is LSB)
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*/
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extern guint16 crc16_ccitt(const unsigned char *buf, guint len);
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extern guint16 crc16_ccitt_tvb(tvbuff_t *tvb, unsigned int len);
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