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1 office 1 /* crc32.c
2 * CRC-32 routine
3 *
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
7 *
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.
12 *
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.
17 *
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.
21 *
22 * Credits:
23 *
24 * Table from Solomon Peachy
25 * Routine from Chris Waters
26 */
27  
28 #include "config.h"
29  
30 #include <glib.h>
31 #include <wsutil/crc32.h>
32  
33 #define CRC32_ACCUMULATE(c,d,table) (c=(c>>8)^(table)[(c^(d))&0xFF])
34  
35 /*****************************************************************/
36 /* */
37 /* CRC32C LOOKUP TABLE */
38 /* +++================ */
39 /* The following CRC lookup table was generated automagically */
40 /* by the Rocksoft^tm Model CRC Algorithm Table Generation */
41 /* Program V1.0 using the following model parameters: */
42 /* */
43 /* Width : 4 bytes. */
44 /* Poly : 0x1EDC6F41L */
45 /* Reverse : TRUE. */
46 /* */
47 /* For more information on the Rocksoft^tm Model CRC Algorithm, */
48 /* see the document titled "A Painless Guide to CRC Error */
49 /* Detection Algorithms" by Ross Williams */
50 /* (ross@guest.adelaide.edu.au.). This document is likely to be */
51 /* in the FTP archive "ftp.adelaide.edu.au/pub/rocksoft". */
52 /* */
53 /*****************************************************************/
54 #define CRC32C(c,d) CRC32_ACCUMULATE(c,d,crc32c_table)
55  
56 static const guint32 crc32c_table[256] = {
57 0x00000000U, 0xF26B8303U, 0xE13B70F7U, 0x1350F3F4U, 0xC79A971FU,
58 0x35F1141CU, 0x26A1E7E8U, 0xD4CA64EBU, 0x8AD958CFU, 0x78B2DBCCU,
59 0x6BE22838U, 0x9989AB3BU, 0x4D43CFD0U, 0xBF284CD3U, 0xAC78BF27U,
60 0x5E133C24U, 0x105EC76FU, 0xE235446CU, 0xF165B798U, 0x030E349BU,
61 0xD7C45070U, 0x25AFD373U, 0x36FF2087U, 0xC494A384U, 0x9A879FA0U,
62 0x68EC1CA3U, 0x7BBCEF57U, 0x89D76C54U, 0x5D1D08BFU, 0xAF768BBCU,
63 0xBC267848U, 0x4E4DFB4BU, 0x20BD8EDEU, 0xD2D60DDDU, 0xC186FE29U,
64 0x33ED7D2AU, 0xE72719C1U, 0x154C9AC2U, 0x061C6936U, 0xF477EA35U,
65 0xAA64D611U, 0x580F5512U, 0x4B5FA6E6U, 0xB93425E5U, 0x6DFE410EU,
66 0x9F95C20DU, 0x8CC531F9U, 0x7EAEB2FAU, 0x30E349B1U, 0xC288CAB2U,
67 0xD1D83946U, 0x23B3BA45U, 0xF779DEAEU, 0x05125DADU, 0x1642AE59U,
68 0xE4292D5AU, 0xBA3A117EU, 0x4851927DU, 0x5B016189U, 0xA96AE28AU,
69 0x7DA08661U, 0x8FCB0562U, 0x9C9BF696U, 0x6EF07595U, 0x417B1DBCU,
70 0xB3109EBFU, 0xA0406D4BU, 0x522BEE48U, 0x86E18AA3U, 0x748A09A0U,
71 0x67DAFA54U, 0x95B17957U, 0xCBA24573U, 0x39C9C670U, 0x2A993584U,
72 0xD8F2B687U, 0x0C38D26CU, 0xFE53516FU, 0xED03A29BU, 0x1F682198U,
73 0x5125DAD3U, 0xA34E59D0U, 0xB01EAA24U, 0x42752927U, 0x96BF4DCCU,
74 0x64D4CECFU, 0x77843D3BU, 0x85EFBE38U, 0xDBFC821CU, 0x2997011FU,
75 0x3AC7F2EBU, 0xC8AC71E8U, 0x1C661503U, 0xEE0D9600U, 0xFD5D65F4U,
76 0x0F36E6F7U, 0x61C69362U, 0x93AD1061U, 0x80FDE395U, 0x72966096U,
77 0xA65C047DU, 0x5437877EU, 0x4767748AU, 0xB50CF789U, 0xEB1FCBADU,
78 0x197448AEU, 0x0A24BB5AU, 0xF84F3859U, 0x2C855CB2U, 0xDEEEDFB1U,
79 0xCDBE2C45U, 0x3FD5AF46U, 0x7198540DU, 0x83F3D70EU, 0x90A324FAU,
80 0x62C8A7F9U, 0xB602C312U, 0x44694011U, 0x5739B3E5U, 0xA55230E6U,
81 0xFB410CC2U, 0x092A8FC1U, 0x1A7A7C35U, 0xE811FF36U, 0x3CDB9BDDU,
82 0xCEB018DEU, 0xDDE0EB2AU, 0x2F8B6829U, 0x82F63B78U, 0x709DB87BU,
83 0x63CD4B8FU, 0x91A6C88CU, 0x456CAC67U, 0xB7072F64U, 0xA457DC90U,
84 0x563C5F93U, 0x082F63B7U, 0xFA44E0B4U, 0xE9141340U, 0x1B7F9043U,
85 0xCFB5F4A8U, 0x3DDE77ABU, 0x2E8E845FU, 0xDCE5075CU, 0x92A8FC17U,
86 0x60C37F14U, 0x73938CE0U, 0x81F80FE3U, 0x55326B08U, 0xA759E80BU,
87 0xB4091BFFU, 0x466298FCU, 0x1871A4D8U, 0xEA1A27DBU, 0xF94AD42FU,
88 0x0B21572CU, 0xDFEB33C7U, 0x2D80B0C4U, 0x3ED04330U, 0xCCBBC033U,
89 0xA24BB5A6U, 0x502036A5U, 0x4370C551U, 0xB11B4652U, 0x65D122B9U,
90 0x97BAA1BAU, 0x84EA524EU, 0x7681D14DU, 0x2892ED69U, 0xDAF96E6AU,
91 0xC9A99D9EU, 0x3BC21E9DU, 0xEF087A76U, 0x1D63F975U, 0x0E330A81U,
92 0xFC588982U, 0xB21572C9U, 0x407EF1CAU, 0x532E023EU, 0xA145813DU,
93 0x758FE5D6U, 0x87E466D5U, 0x94B49521U, 0x66DF1622U, 0x38CC2A06U,
94 0xCAA7A905U, 0xD9F75AF1U, 0x2B9CD9F2U, 0xFF56BD19U, 0x0D3D3E1AU,
95 0x1E6DCDEEU, 0xEC064EEDU, 0xC38D26C4U, 0x31E6A5C7U, 0x22B65633U,
96 0xD0DDD530U, 0x0417B1DBU, 0xF67C32D8U, 0xE52CC12CU, 0x1747422FU,
97 0x49547E0BU, 0xBB3FFD08U, 0xA86F0EFCU, 0x5A048DFFU, 0x8ECEE914U,
98 0x7CA56A17U, 0x6FF599E3U, 0x9D9E1AE0U, 0xD3D3E1ABU, 0x21B862A8U,
99 0x32E8915CU, 0xC083125FU, 0x144976B4U, 0xE622F5B7U, 0xF5720643U,
100 0x07198540U, 0x590AB964U, 0xAB613A67U, 0xB831C993U, 0x4A5A4A90U,
101 0x9E902E7BU, 0x6CFBAD78U, 0x7FAB5E8CU, 0x8DC0DD8FU, 0xE330A81AU,
102 0x115B2B19U, 0x020BD8EDU, 0xF0605BEEU, 0x24AA3F05U, 0xD6C1BC06U,
103 0xC5914FF2U, 0x37FACCF1U, 0x69E9F0D5U, 0x9B8273D6U, 0x88D28022U,
104 0x7AB90321U, 0xAE7367CAU, 0x5C18E4C9U, 0x4F48173DU, 0xBD23943EU,
105 0xF36E6F75U, 0x0105EC76U, 0x12551F82U, 0xE03E9C81U, 0x34F4F86AU,
106 0xC69F7B69U, 0xD5CF889DU, 0x27A40B9EU, 0x79B737BAU, 0x8BDCB4B9U,
107 0x988C474DU, 0x6AE7C44EU, 0xBE2DA0A5U, 0x4C4623A6U, 0x5F16D052U,
108 0xAD7D5351U };
109  
110 /*
111 * Table for the AUTODIN/HDLC/802.x CRC.
112 *
113 * Polynomial is
114 *
115 * x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 +
116 * x^7 + x^5 + x^4 + x^2 + x + 1
117 */
118 static const guint32 crc32_ccitt_table[256] = {
119 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
120 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
121 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
122 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
123 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
124 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
125 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
126 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
127 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
128 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
129 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
130 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
131 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
132 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
133 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
134 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
135 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
136 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
137 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
138 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
139 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
140 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
141 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
142 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
143 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
144 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
145 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
146 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
147 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
148 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
149 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
150 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
151 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
152 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
153 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
154 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
155 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
156 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
157 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
158 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
159 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
160 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
161 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
162 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
163 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
164 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
165 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
166 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
167 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
168 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
169 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
170 0x2d02ef8d
171 };
172  
173 /*
174 * Table for the MPEG-2 CRC.
175 *
176 * Polynomial is
177 *
178 * x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 +
179 * x^7 + x^5 + x^4 + x^2 + x + 1
180 *
181 * (which is the same polynomial as the one above us).
182 *
183 * NOTE: this is also used for ATM AAL5.
184 */
185 static const guint32 crc32_mpeg2_table[256] = {
186 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
187 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
188 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
189 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
190 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
191 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
192 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
193 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
194 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
195 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
196 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
197 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
198 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
199 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
200 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
201 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
202 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
203 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
204 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
205 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
206 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
207 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
208 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
209 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
210 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
211 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
212 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
213 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
214 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
215 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
216 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
217 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
218 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
219 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
220 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
221 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
222 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
223 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
224 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
225 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
226 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
227 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
228 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
229 };
230  
231 /* This table was compiled using the polynom: 0x0AA725CF*/
232 static const guint32 crc32_0AA725CF_reverse[] = {
233 0x00000000U, 0xCEAA95CEU, 0x7A1CE13DU, 0xB4B674F3U,
234 0xF439C27AU, 0x3A9357B4U, 0x8E252347U, 0x408FB689U,
235 0x0F3A4E55U, 0xC190DB9BU, 0x7526AF68U, 0xBB8C3AA6U,
236 0xFB038C2FU, 0x35A919E1U, 0x811F6D12U, 0x4FB5F8DCU,
237 0x1E749CAAU, 0xD0DE0964U, 0x64687D97U, 0xAAC2E859U,
238 0xEA4D5ED0U, 0x24E7CB1EU, 0x9051BFEDU, 0x5EFB2A23U,
239 0x114ED2FFU, 0xDFE44731U, 0x6B5233C2U, 0xA5F8A60CU,
240 0xE5771085U, 0x2BDD854BU, 0x9F6BF1B8U, 0x51C16476U,
241 0x3CE93954U, 0xF243AC9AU, 0x46F5D869U, 0x885F4DA7U,
242 0xC8D0FB2EU, 0x067A6EE0U, 0xB2CC1A13U, 0x7C668FDDU,
243 0x33D37701U, 0xFD79E2CFU, 0x49CF963CU, 0x876503F2U,
244 0xC7EAB57BU, 0x094020B5U, 0xBDF65446U, 0x735CC188U,
245 0x229DA5FEU, 0xEC373030U, 0x588144C3U, 0x962BD10DU,
246 0xD6A46784U, 0x180EF24AU, 0xACB886B9U, 0x62121377U,
247 0x2DA7EBABU, 0xE30D7E65U, 0x57BB0A96U, 0x99119F58U,
248 0xD99E29D1U, 0x1734BC1FU, 0xA382C8ECU, 0x6D285D22U,
249 0x79D272A8U, 0xB778E766U, 0x03CE9395U, 0xCD64065BU,
250 0x8DEBB0D2U, 0x4341251CU, 0xF7F751EFU, 0x395DC421U,
251 0x76E83CFDU, 0xB842A933U, 0x0CF4DDC0U, 0xC25E480EU,
252 0x82D1FE87U, 0x4C7B6B49U, 0xF8CD1FBAU, 0x36678A74U,
253 0x67A6EE02U, 0xA90C7BCCU, 0x1DBA0F3FU, 0xD3109AF1U,
254 0x939F2C78U, 0x5D35B9B6U, 0xE983CD45U, 0x2729588BU,
255 0x689CA057U, 0xA6363599U, 0x1280416AU, 0xDC2AD4A4U,
256 0x9CA5622DU, 0x520FF7E3U, 0xE6B98310U, 0x281316DEU,
257 0x453B4BFCU, 0x8B91DE32U, 0x3F27AAC1U, 0xF18D3F0FU,
258 0xB1028986U, 0x7FA81C48U, 0xCB1E68BBU, 0x05B4FD75U,
259 0x4A0105A9U, 0x84AB9067U, 0x301DE494U, 0xFEB7715AU,
260 0xBE38C7D3U, 0x7092521DU, 0xC42426EEU, 0x0A8EB320U,
261 0x5B4FD756U, 0x95E54298U, 0x2153366BU, 0xEFF9A3A5U,
262 0xAF76152CU, 0x61DC80E2U, 0xD56AF411U, 0x1BC061DFU,
263 0x54759903U, 0x9ADF0CCDU, 0x2E69783EU, 0xE0C3EDF0U,
264 0xA04C5B79U, 0x6EE6CEB7U, 0xDA50BA44U, 0x14FA2F8AU,
265 0xF3A4E550U, 0x3D0E709EU, 0x89B8046DU, 0x471291A3U,
266 0x079D272AU, 0xC937B2E4U, 0x7D81C617U, 0xB32B53D9U,
267 0xFC9EAB05U, 0x32343ECBU, 0x86824A38U, 0x4828DFF6U,
268 0x08A7697FU, 0xC60DFCB1U, 0x72BB8842U, 0xBC111D8CU,
269 0xEDD079FAU, 0x237AEC34U, 0x97CC98C7U, 0x59660D09U,
270 0x19E9BB80U, 0xD7432E4EU, 0x63F55ABDU, 0xAD5FCF73U,
271 0xE2EA37AFU, 0x2C40A261U, 0x98F6D692U, 0x565C435CU,
272 0x16D3F5D5U, 0xD879601BU, 0x6CCF14E8U, 0xA2658126U,
273 0xCF4DDC04U, 0x01E749CAU, 0xB5513D39U, 0x7BFBA8F7U,
274 0x3B741E7EU, 0xF5DE8BB0U, 0x4168FF43U, 0x8FC26A8DU,
275 0xC0779251U, 0x0EDD079FU, 0xBA6B736CU, 0x74C1E6A2U,
276 0x344E502BU, 0xFAE4C5E5U, 0x4E52B116U, 0x80F824D8U,
277 0xD13940AEU, 0x1F93D560U, 0xAB25A193U, 0x658F345DU,
278 0x250082D4U, 0xEBAA171AU, 0x5F1C63E9U, 0x91B6F627U,
279 0xDE030EFBU, 0x10A99B35U, 0xA41FEFC6U, 0x6AB57A08U,
280 0x2A3ACC81U, 0xE490594FU, 0x50262DBCU, 0x9E8CB872U,
281 0x8A7697F8U, 0x44DC0236U, 0xF06A76C5U, 0x3EC0E30BU,
282 0x7E4F5582U, 0xB0E5C04CU, 0x0453B4BFU, 0xCAF92171U,
283 0x854CD9ADU, 0x4BE64C63U, 0xFF503890U, 0x31FAAD5EU,
284 0x71751BD7U, 0xBFDF8E19U, 0x0B69FAEAU, 0xC5C36F24U,
285 0x94020B52U, 0x5AA89E9CU, 0xEE1EEA6FU, 0x20B47FA1U,
286 0x603BC928U, 0xAE915CE6U, 0x1A272815U, 0xD48DBDDBU,
287 0x9B384507U, 0x5592D0C9U, 0xE124A43AU, 0x2F8E31F4U,
288 0x6F01877DU, 0xA1AB12B3U, 0x151D6640U, 0xDBB7F38EU,
289 0xB69FAEACU, 0x78353B62U, 0xCC834F91U, 0x0229DA5FU,
290 0x42A66CD6U, 0x8C0CF918U, 0x38BA8DEBU, 0xF6101825U,
291 0xB9A5E0F9U, 0x770F7537U, 0xC3B901C4U, 0x0D13940AU,
292 0x4D9C2283U, 0x8336B74DU, 0x3780C3BEU, 0xF92A5670U,
293 0xA8EB3206U, 0x6641A7C8U, 0xD2F7D33BU, 0x1C5D46F5U,
294 0x5CD2F07CU, 0x927865B2U, 0x26CE1141U, 0xE864848FU,
295 0xA7D17C53U, 0x697BE99DU, 0xDDCD9D6EU, 0x136708A0U,
296 0x53E8BE29U, 0x9D422BE7U, 0x29F45F14U, 0xE75ECADAU
297 };
298  
299 guint32
300 crc32c_table_lookup (guchar pos)
301 {
302 return crc32c_table[pos];
303 }
304  
305 guint32
306 crc32_ccitt_table_lookup (guchar pos)
307 {
308 return crc32_ccitt_table[pos];
309 }
310  
311 guint32
312 crc32c_calculate(const void *buf, int len, guint32 crc)
313 {
314 const guint8 *p = (const guint8 *)buf;
315 crc = CRC32C_SWAP(crc);
316 while (len-- > 0) {
317 CRC32C(crc, *p++);
318 }
319 return CRC32C_SWAP(crc);
320 }
321  
322 guint32
323 crc32c_calculate_no_swap(const void *buf, int len, guint32 crc)
324 {
325 const guint8 *p = (const guint8 *)buf;
326 while (len-- > 0) {
327 CRC32C(crc, *p++);
328 }
329  
330 return crc;
331 }
332  
333 guint32
334 crc32_ccitt(const guint8 *buf, guint len)
335 {
336 return (crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED));
337 }
338  
339 guint32
340 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed)
341 {
342 guint i;
343 guint32 crc32 = seed;
344  
345 for (i = 0; i < len; i++)
346 CRC32_ACCUMULATE(crc32, buf[i], crc32_ccitt_table);
347  
348 return ( ~crc32 );
349 }
350  
351 guint32
352 crc32_mpeg2_seed(const guint8 *buf, guint len, guint32 seed)
353 {
354 guint i;
355 guint32 crc32;
356  
357 crc32 = seed;
358  
359 for (i = 0; i < len; i++)
360 crc32 = (crc32 << 8) ^ crc32_mpeg2_table[((crc32 >> 24) ^ buf[i]) & 0xff];
361  
362 return ( crc32 );
363 }
364  
365 guint32
366 crc32_0x0AA725CF_seed(const guint8 *buf, guint len, guint32 seed)
367 {
368 guint crc32;
369  
370 crc32 = (guint)seed;
371 while( len-- != 0 )
372 CRC32_ACCUMULATE(crc32, *buf++, crc32_0AA725CF_reverse);
373  
374 return (guint32)crc32;
375 }
376  
377 /*
378 * Editor modelines - http://www.wireshark.org/tools/modelines.html
379 *
380 * Local variables:
381 * c-basic-offset: 8
382 * tab-width: 8
383 * indent-tabs-mode: t
384 * End:
385 *
386 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
387 * :indentSize=8:tabSize=8:noTabs=false:
388 */