wsutil/crc32.c

   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 /* This table was compiled using the polynom: 0x5D6DCB */
 300 static const guint32 crc32_5D6DCB[] =
 301 {
 302                 0x00000000, 0x005d6dcb, 0x00badb96, 0x00e7b65d,
 303                 0x0028dae7, 0x0075b72c, 0x00920171, 0x00cf6cba,
 304                 0x0051b5ce, 0x000cd805, 0x00eb6e58, 0x00b60393,
 305                 0x00796f29, 0x002402e2, 0x00c3b4bf, 0x009ed974,
 306                 0x00a36b9c, 0x00fe0657, 0x0019b00a, 0x0044ddc1,
 307                 0x008bb17b, 0x00d6dcb0, 0x00316aed, 0x006c0726,
 308                 0x00f2de52, 0x00afb399, 0x004805c4, 0x0015680f,
 309                 0x00da04b5, 0x0087697e, 0x0060df23, 0x003db2e8,
 310                 0x001bbaf3, 0x0046d738, 0x00a16165, 0x00fc0cae,
 311                 0x00336014, 0x006e0ddf, 0x0089bb82, 0x00d4d649,
 312                 0x004a0f3d, 0x001762f6, 0x00f0d4ab, 0x00adb960,
 313                 0x0062d5da, 0x003fb811, 0x00d80e4c, 0x00856387,
 314                 0x00b8d16f, 0x00e5bca4, 0x00020af9, 0x005f6732,
 315                 0x00900b88, 0x00cd6643, 0x002ad01e, 0x0077bdd5,
 316                 0x00e964a1, 0x00b4096a, 0x0053bf37, 0x000ed2fc,
 317                 0x00c1be46, 0x009cd38d, 0x007b65d0, 0x0026081b,
 318                 0x003775e6, 0x006a182d, 0x008dae70, 0x00d0c3bb,
 319                 0x001faf01, 0x0042c2ca, 0x00a57497, 0x00f8195c,
 320                 0x0066c028, 0x003bade3, 0x00dc1bbe, 0x00817675,
 321                 0x004e1acf, 0x00137704, 0x00f4c159, 0x00a9ac92,
 322                 0x00941e7a, 0x00c973b1, 0x002ec5ec, 0x0073a827,
 323                 0x00bcc49d, 0x00e1a956, 0x00061f0b, 0x005b72c0,
 324                 0x00c5abb4, 0x0098c67f, 0x007f7022, 0x00221de9,
 325                 0x00ed7153, 0x00b01c98, 0x0057aac5, 0x000ac70e,
 326                 0x002ccf15, 0x0071a2de, 0x00961483, 0x00cb7948,
 327                 0x000415f2, 0x00597839, 0x00bece64, 0x00e3a3af,
 328                 0x007d7adb, 0x00201710, 0x00c7a14d, 0x009acc86,
 329                 0x0055a03c, 0x0008cdf7, 0x00ef7baa, 0x00b21661,
 330                 0x008fa489, 0x00d2c942, 0x00357f1f, 0x006812d4,
 331                 0x00a77e6e, 0x00fa13a5, 0x001da5f8, 0x0040c833,
 332                 0x00de1147, 0x00837c8c, 0x0064cad1, 0x0039a71a,
 333                 0x00f6cba0, 0x00aba66b, 0x004c1036, 0x00117dfd,
 334                 0x006eebcc, 0x00338607, 0x00d4305a, 0x00895d91,
 335                 0x0046312b, 0x001b5ce0, 0x00fceabd, 0x00a18776,
 336                 0x003f5e02, 0x006233c9, 0x00858594, 0x00d8e85f,
 337                 0x001784e5, 0x004ae92e, 0x00ad5f73, 0x00f032b8,
 338                 0x00cd8050, 0x0090ed9b, 0x00775bc6, 0x002a360d,
 339                 0x00e55ab7, 0x00b8377c, 0x005f8121, 0x0002ecea,
 340                 0x009c359e, 0x00c15855, 0x0026ee08, 0x007b83c3,
 341                 0x00b4ef79, 0x00e982b2, 0x000e34ef, 0x00535924,
 342                 0x0075513f, 0x00283cf4, 0x00cf8aa9, 0x0092e762,
 343                 0x005d8bd8, 0x0000e613, 0x00e7504e, 0x00ba3d85,
 344                 0x0024e4f1, 0x0079893a, 0x009e3f67, 0x00c352ac,
 345                 0x000c3e16, 0x005153dd, 0x00b6e580, 0x00eb884b,
 346                 0x00d63aa3, 0x008b5768, 0x006ce135, 0x00318cfe,
 347                 0x00fee044, 0x00a38d8f, 0x00443bd2, 0x00195619,
 348                 0x00878f6d, 0x00dae2a6, 0x003d54fb, 0x00603930,
 349                 0x00af558a, 0x00f23841, 0x00158e1c, 0x0048e3d7,
 350                 0x00599e2a, 0x0004f3e1, 0x00e345bc, 0x00be2877,
 351                 0x007144cd, 0x002c2906, 0x00cb9f5b, 0x0096f290,
 352                 0x00082be4, 0x0055462f, 0x00b2f072, 0x00ef9db9,
 353                 0x0020f103, 0x007d9cc8, 0x009a2a95, 0x00c7475e,
 354                 0x00faf5b6, 0x00a7987d, 0x00402e20, 0x001d43eb,
 355                 0x00d22f51, 0x008f429a, 0x0068f4c7, 0x0035990c,
 356                 0x00ab4078, 0x00f62db3, 0x00119bee, 0x004cf625,
 357                 0x00839a9f, 0x00def754, 0x00394109, 0x00642cc2,
 358                 0x004224d9, 0x001f4912, 0x00f8ff4f, 0x00a59284,
 359                 0x006afe3e, 0x003793f5, 0x00d025a8, 0x008d4863,
 360                 0x00139117, 0x004efcdc, 0x00a94a81, 0x00f4274a,
 361                 0x003b4bf0, 0x0066263b, 0x00819066, 0x00dcfdad,
 362                 0x00e14f45, 0x00bc228e, 0x005b94d3, 0x0006f918,
 363                 0x00c995a2, 0x0094f869, 0x00734e34, 0x002e23ff,
 364                 0x00b0fa8b, 0x00ed9740, 0x000a211d, 0x00574cd6,
 365                 0x0098206c, 0x00c54da7, 0x0022fbfa, 0x007f9631
 366 };
 367
 368 guint32
 369 crc32c_table_lookup (guchar pos)
 370 {
 371         return crc32c_table[pos];
 372 }
 373
 374 guint32
 375 crc32_ccitt_table_lookup (guchar pos)
 376 {
 377         return crc32_ccitt_table[pos];
 378 }
 379
 380 guint32
 381 crc32c_calculate(const void *buf, int len, guint32 crc)
 382 {
 383         const guint8 *p = (const guint8 *)buf;
 384         crc = CRC32C_SWAP(crc);
 385         while (len-- > 0) {
 386                 CRC32C(crc, *p++);
 387         }
 388         return CRC32C_SWAP(crc);
 389 }
 390
 391 guint32
 392 crc32c_calculate_no_swap(const void *buf, int len, guint32 crc)
 393 {
 394         const guint8 *p = (const guint8 *)buf;
 395         while (len-- > 0) {
 396                 CRC32C(crc, *p++);
 397         }
 398
 399         return crc;
 400 }
 401
 402 guint32
 403 crc32_ccitt(const guint8 *buf, guint len)
 404 {
 405         return (crc32_ccitt_seed(buf, len, CRC32_CCITT_SEED));
 406 }
 407
 408 guint32
 409 crc32_ccitt_seed(const guint8 *buf, guint len, guint32 seed)
 410 {
 411         guint i;
 412         guint32 crc32 = seed;
 413
 414         for (i = 0; i < len; i++)
 415                 CRC32_ACCUMULATE(crc32, buf[i], crc32_ccitt_table);
 416
 417         return ( ~crc32 );
 418 }
 419
 420 guint32
 421 crc32_mpeg2_seed(const guint8 *buf, guint len, guint32 seed)
 422 {
 423         guint i;
 424         guint32 crc32;
 425
 426         crc32 = seed;
 427
 428         for (i = 0; i < len; i++)
 429                 crc32 = (crc32 << 8) ^ crc32_mpeg2_table[((crc32 >> 24) ^ buf[i]) & 0xff];
 430
 431         return ( crc32 );
 432 }
 433
 434 guint32
 435 crc32_0x0AA725CF_seed(const guint8 *buf, guint len, guint32 seed)
 436 {
 437         guint crc32;
 438
 439         crc32 = (guint)seed;
 440         while( len-- != 0 )
 441                 CRC32_ACCUMULATE(crc32, *buf++, crc32_0AA725CF_reverse);
 442
 443         return (guint32)crc32;
 444 }
 445
 446 guint32
 447 crc32_0x5D6DCB_seed(const guint8 *buf, guint len, guint32 seed)
 448 {
 449         guint32 crc = seed;
 450         if (len > 0)
 451         {
 452                 while (len-- > 0)
 453                 {
 454                         guint8 data = *buf++;
 455                         /* XOR data with CRC2, look up result, then XOR that with CRC; */
 456                         crc = crc32_5D6DCB[((crc >> 16) ^ data) & 0xff] ^ (crc << 8);
 457                 }
 458         }
 459         return (crc & 0x00ffffff);
 460 }
 461
 462
 463 /*
 464  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 465  *
 466  * Local variables:
 467  * c-basic-offset: 8
 468  * tab-width: 8
 469  * indent-tabs-mode: t
 470  * End:
 471  *
 472  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 473  * :indentSize=8:tabSize=8:noTabs=false:
 474  */