![Stig Bjørlykke](/assets/img/avatar_default.png)
This time keep the tvb routines in epan. Now we can use common crc routines outside epan. svn path=/trunk/; revision=38810
95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
/* crc16-tvb.h
|
|
* Declaration of CRC-16 tvbuff routines
|
|
*
|
|
* 2004 Richard van der Hoff <richardv@mxtelecom.com>
|
|
*
|
|
* $Id$
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef __CRC16_TVB_H__
|
|
#define __CRC16_TVB_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
/** Compute CRC16 CCITT checksum of a tv buffer.
|
|
@param tvb The tv buffer containing the data.
|
|
@param len The number of bytes to include in the computation.
|
|
@return The CRC16 CCITT checksum. */
|
|
extern guint16 crc16_ccitt_tvb(tvbuff_t *tvb, guint len);
|
|
|
|
/** Compute CRC16 X.25 CCITT checksum of a tv buffer.
|
|
@param tvb The tv buffer containing the data.
|
|
@param len The number of bytes to include in the computation.
|
|
@return The CRC16 X.25 CCITT checksum. */
|
|
extern guint16 crc16_x25_ccitt_tvb(tvbuff_t *tvb, guint len);
|
|
|
|
/** Compute CRC16 CCITT checksum of a tv buffer.
|
|
@param tvb The tv buffer containing the data.
|
|
@param offset The offset into the tv buffer.
|
|
@param len The number of bytes to include in the computation.
|
|
@return The CRC16 CCITT checksum. */
|
|
extern guint16 crc16_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
|
|
|
|
/** Compute CRC16 CCITT checksum of a tv buffer. If computing the
|
|
* checksum over multiple tv buffers and you want to feed the partial CRC16
|
|
* back in, remember to take the 1's complement of the partial CRC16 first.
|
|
@param tvb The tv buffer containing the data.
|
|
@param len The number of bytes to include in the computation.
|
|
@param seed The seed to use.
|
|
@return The CRC16 CCITT checksum (using the given seed). */
|
|
extern guint16 crc16_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint16 seed);
|
|
|
|
/** Compute CRC16 CCITT checksum of a tv buffer. If computing the
|
|
* checksum over multiple tv buffers and you want to feed the partial CRC16
|
|
* back in, remember to take the 1's complement of the partial CRC16 first.
|
|
@param tvb The tv buffer containing the data.
|
|
@param offset The offset into the tv buffer.
|
|
@param len The number of bytes to include in the computation.
|
|
@param seed The seed to use.
|
|
@return The CRC16 CCITT checksum (using the given seed). */
|
|
extern guint16 crc16_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset,
|
|
guint len, guint16 seed);
|
|
|
|
/** Compute the "plain" CRC16 checksum of a tv buffer using the following
|
|
* parameters:
|
|
* Width = 16
|
|
* Poly = 0x8005
|
|
* XorIn = 0x0000
|
|
* ReflectIn = True
|
|
* XorOut = 0x0000
|
|
* ReflectOut = True
|
|
* Algorithm = table-driven
|
|
* Direct = True
|
|
@param tvb The tv buffer containing the data.
|
|
@param offset The offset into the tv buffer.
|
|
@param len The number of bytes to include in the computation.
|
|
@return The CRC16 checksum. */
|
|
extern guint16 crc16_plain_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* crc16-tvb.h */
|