2 * Declaration of CRC-32 tvbuff routines
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #ifndef __CRC32_TVB_H__
24 #define __CRC32_TVB_H__
26 #include "ws_symbol_export.h"
30 #endif /* __cplusplus */
32 /** Compute CRC32 CCITT checksum of a tv buffer.
33 @param tvb The tv buffer containing the data.
34 @param len The number of bytes to include in the computation.
35 @return The CRC32 CCITT checksum. */
36 WS_DLL_PUBLIC guint32 crc32_ccitt_tvb(tvbuff_t *tvb, guint len);
38 /** Compute CRC32 CCITT checksum of a tv buffer.
39 @param tvb The tv buffer containing the data.
40 @param offset The offset into the tv buffer.
41 @param len The number of bytes to include in the computation.
42 @return The CRC32 CCITT checksum. */
43 WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
45 /** Compute CRC32 CCITT checksum of a tv buffer. If computing the
46 * checksum over multiple tv buffers and you want to feed the partial CRC32
47 * back in, remember to take the 1's complement of the partial CRC32 first.
48 @param tvb The tv buffer containing the data.
49 @param len The number of bytes to include in the computation.
50 @param seed The seed to use.
51 @return The CRC32 CCITT checksum (using the given seed). */
52 WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed);
54 /** Compute CRC32C checksum of a tv buffer. If computing the
55 * checksum over multiple tv buffers and you want to feed the partial CRC32
56 * back in, remember to take the 1's complement of the partial CRC32 first.
57 @param tvb The tv buffer containing the data.
58 @param offset The offset into the tv buffer.
59 @param len The number of bytes to include in the computation.
60 @param seed The seed to use.
61 @return The CRC32C checksum (using the given seed). */
62 WS_DLL_PUBLIC guint32 crc32c_tvb_offset_calculate(tvbuff_t *tvb, guint offset,
63 guint len, guint32 seed);
65 /** Compute CRC32 CCITT checksum of a tv buffer. If computing the
66 * checksum over multiple tv buffers and you want to feed the partial CRC32
67 * back in, remember to take the 1's complement of the partial CRC32 first.
68 @param tvb The tv buffer containing the data.
69 @param offset The offset into the tv buffer.
70 @param len The number of bytes to include in the computation.
71 @param seed The seed to use.
72 @return The CRC32 CCITT checksum (using the given seed). */
73 WS_DLL_PUBLIC guint32 crc32_ccitt_tvb_offset_seed(tvbuff_t *tvb, guint offset,
74 guint len, guint32 seed);
76 /** Compute IEEE 802.x CRC32 checksum of a tv buffer.
77 @param tvb The tv buffer containing the data.
78 @param len The number of bytes to include in the computation.
79 @return The IEEE 802.x CRC32 checksum. */
80 WS_DLL_PUBLIC guint32 crc32_802_tvb(tvbuff_t *tvb, guint len);
83 /** Compute MPEG-2 CRC32 checksum of a tv buffer.
84 @param tvb The tv buffer containing the data.
85 @param len The number of bytes to include in the computation.
86 @return The MPEG-2 CRC32 checksum. */
87 WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb(tvbuff_t *tvb, guint len);
89 /** Compute MPEG-2 CRC32 checksum of a tv buffer.
90 @param tvb The tv buffer containing the data.
91 @param offset The offset into the tv buffer.
92 @param len The number of bytes to include in the computation.
93 @return The MPEG-2 CRC32 checksum. */
94 WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_offset(tvbuff_t *tvb, guint offset, guint len);
96 /** Compute MPEG-2 CRC32 checksum of a buffer of data.
97 @param tvb The tv buffer containing the data.
98 @param len The number of bytes to include in the computation.
99 @param seed The seed to use.
100 @return The CRC32 MPEG-2 checksum (using the given seed). */
101 WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_seed(tvbuff_t *tvb, guint len, guint32 seed);
103 /** Compute MPEG-2 CRC32 checksum of a buffer of data.
104 @param tvb The tv buffer containing the data.
105 @param offset The offset into the tv buffer.
106 @param len The number of bytes to include in the computation.
107 @param seed The seed to use.
108 @return The CRC32 MPEG-2 checksum (using the given seed). */
109 WS_DLL_PUBLIC guint32 crc32_mpeg2_tvb_offset_seed(tvbuff_t *tvb, guint offset,
110 guint len, guint32 seed);
112 /** Compute CRC32 checksum of a tv buffer using the parameters
116 * Algorithm = table-driven
117 @param tvb The tv buffer containing the data.
118 @param offset The offset into the tv buffer.
119 @param len The number of bytes to include in the computation.
120 @param seed The seed to use.
121 @return The CRC32 checksum. */
122 WS_DLL_PUBLIC guint32 crc32_0x0AA725CF_tvb_offset_seed(tvbuff_t *tvb,
123 guint offset, guint len, guint32 seed);
127 #endif /* __cplusplus */
129 #endif /* crc32-tvb.h */