ext/sctp/usrsctp/usrsctplib/netinet/sctp_crc32.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *   this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *   the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #if defined(__FreeBSD__) && !defined(__Userspace__)
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD: head/sys/netinet/sctp_crc32.c 362498 2020-06-22 14:36:14Z tuexen $");
  38
  39 #include "opt_sctp.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/gsb_crc32.h>
  44 #include <sys/mbuf.h>
  45
  46 #include <netinet/sctp.h>
  47 #include <netinet/sctp_crc32.h>
  48 #if defined(SCTP) || defined(SCTP_SUPPORT)
  49 #include <netinet/sctp_os.h>
  50 #include <netinet/sctp_pcb.h>
  51 #endif
  52 #else
  53 #include <netinet/sctp_os.h>
  54 #include <netinet/sctp.h>
  55 #include <netinet/sctp_crc32.h>
  56 #include <netinet/sctp_pcb.h>
  57 #endif
  58
  59 #if !(defined(__FreeBSD__) && !defined(__Userspace__))
  60 /**
  61  *
  62  * Routine Description:
  63  *
  64  * Computes the CRC32c checksum for the specified buffer using the slicing by 8
  65  * algorithm over 64 bit quantities.
  66  *
  67  * Arguments:
  68  *
  69  *              p_running_crc - pointer to the initial or final remainder value
  70  *                              used in CRC computations. It should be set to
  71  *                              non-NULL if the mode argument is equal to CONT or END
  72  *              p_buf - the packet buffer where crc computations are being performed
  73  *              length - the length of p_buf in bytes
  74  *              init_bytes - the number of initial bytes that need to be procesed before
  75  *                                       aligning p_buf to multiples of 4 bytes
  76  *              mode - can be any of the following: BEGIN, CONT, END, BODY, ALIGN
  77  *
  78  * Return value:
  79  *
  80  *              The computed CRC32c value
  81  */
  82
  83
  84 /*
  85  * Copyright (c) 2004-2006 Intel Corporation - All Rights Reserved
  86  *
  87  *
  88  * This software program is licensed subject to the BSD License, available at
  89  * http://www.opensource.org/licenses/bsd-license.html.
  90  *
  91  * Abstract:
  92  *
  93  * Tables for software CRC generation
  94  */
  95
  96 /*
  97  * The following CRC lookup table was generated automagically using the
  98  * following model parameters:
  99  *
 100  * Generator Polynomial = ................. 0x1EDC6F41
 101  * Generator Polynomial Length = .......... 32 bits
 102  * Reflected Bits = ....................... TRUE
 103  * Table Generation Offset = .............. 32 bits
 104  * Number of Slices = ..................... 8 slices
 105  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 106  * Directory Name = ....................... .\
 107  * File Name = ............................ 8x256_tables.c
 108  */
 109
 110 static const uint32_t sctp_crc_tableil8_o32[256] =
 111 {
 112         0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
 113         0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
 114         0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
 115         0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
 116         0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
 117         0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
 118         0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
 119         0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
 120         0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
 121         0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
 122         0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
 123         0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
 124         0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
 125         0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
 126         0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
 127         0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
 128         0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
 129         0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
 130         0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
 131         0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
 132         0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
 133         0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
 134         0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
 135         0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
 136         0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
 137         0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
 138         0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
 139         0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
 140         0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
 141         0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
 142         0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
 143         0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351
 144 };
 145
 146 /*
 147  * end of the CRC lookup table crc_tableil8_o32
 148  */
 149
 150
 151
 152 /*
 153  * The following CRC lookup table was generated automagically using the
 154  * following model parameters:
 155  *
 156  * Generator Polynomial = ................. 0x1EDC6F41
 157  * Generator Polynomial Length = .......... 32 bits
 158  * Reflected Bits = ....................... TRUE
 159  * Table Generation Offset = .............. 32 bits
 160  * Number of Slices = ..................... 8 slices
 161  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 162  * Directory Name = ....................... .\
 163  * File Name = ............................ 8x256_tables.c
 164  */
 165
 166 static const uint32_t sctp_crc_tableil8_o40[256] =
 167 {
 168         0x00000000, 0x13A29877, 0x274530EE, 0x34E7A899, 0x4E8A61DC, 0x5D28F9AB, 0x69CF5132, 0x7A6DC945,
 169         0x9D14C3B8, 0x8EB65BCF, 0xBA51F356, 0xA9F36B21, 0xD39EA264, 0xC03C3A13, 0xF4DB928A, 0xE7790AFD,
 170         0x3FC5F181, 0x2C6769F6, 0x1880C16F, 0x0B225918, 0x714F905D, 0x62ED082A, 0x560AA0B3, 0x45A838C4,
 171         0xA2D13239, 0xB173AA4E, 0x859402D7, 0x96369AA0, 0xEC5B53E5, 0xFFF9CB92, 0xCB1E630B, 0xD8BCFB7C,
 172         0x7F8BE302, 0x6C297B75, 0x58CED3EC, 0x4B6C4B9B, 0x310182DE, 0x22A31AA9, 0x1644B230, 0x05E62A47,
 173         0xE29F20BA, 0xF13DB8CD, 0xC5DA1054, 0xD6788823, 0xAC154166, 0xBFB7D911, 0x8B507188, 0x98F2E9FF,
 174         0x404E1283, 0x53EC8AF4, 0x670B226D, 0x74A9BA1A, 0x0EC4735F, 0x1D66EB28, 0x298143B1, 0x3A23DBC6,
 175         0xDD5AD13B, 0xCEF8494C, 0xFA1FE1D5, 0xE9BD79A2, 0x93D0B0E7, 0x80722890, 0xB4958009, 0xA737187E,
 176         0xFF17C604, 0xECB55E73, 0xD852F6EA, 0xCBF06E9D, 0xB19DA7D8, 0xA23F3FAF, 0x96D89736, 0x857A0F41,
 177         0x620305BC, 0x71A19DCB, 0x45463552, 0x56E4AD25, 0x2C896460, 0x3F2BFC17, 0x0BCC548E, 0x186ECCF9,
 178         0xC0D23785, 0xD370AFF2, 0xE797076B, 0xF4359F1C, 0x8E585659, 0x9DFACE2E, 0xA91D66B7, 0xBABFFEC0,
 179         0x5DC6F43D, 0x4E646C4A, 0x7A83C4D3, 0x69215CA4, 0x134C95E1, 0x00EE0D96, 0x3409A50F, 0x27AB3D78,
 180         0x809C2506, 0x933EBD71, 0xA7D915E8, 0xB47B8D9F, 0xCE1644DA, 0xDDB4DCAD, 0xE9537434, 0xFAF1EC43,
 181         0x1D88E6BE, 0x0E2A7EC9, 0x3ACDD650, 0x296F4E27, 0x53028762, 0x40A01F15, 0x7447B78C, 0x67E52FFB,
 182         0xBF59D487, 0xACFB4CF0, 0x981CE469, 0x8BBE7C1E, 0xF1D3B55B, 0xE2712D2C, 0xD69685B5, 0xC5341DC2,
 183         0x224D173F, 0x31EF8F48, 0x050827D1, 0x16AABFA6, 0x6CC776E3, 0x7F65EE94, 0x4B82460D, 0x5820DE7A,
 184         0xFBC3FAF9, 0xE861628E, 0xDC86CA17, 0xCF245260, 0xB5499B25, 0xA6EB0352, 0x920CABCB, 0x81AE33BC,
 185         0x66D73941, 0x7575A136, 0x419209AF, 0x523091D8, 0x285D589D, 0x3BFFC0EA, 0x0F186873, 0x1CBAF004,
 186         0xC4060B78, 0xD7A4930F, 0xE3433B96, 0xF0E1A3E1, 0x8A8C6AA4, 0x992EF2D3, 0xADC95A4A, 0xBE6BC23D,
 187         0x5912C8C0, 0x4AB050B7, 0x7E57F82E, 0x6DF56059, 0x1798A91C, 0x043A316B, 0x30DD99F2, 0x237F0185,
 188         0x844819FB, 0x97EA818C, 0xA30D2915, 0xB0AFB162, 0xCAC27827, 0xD960E050, 0xED8748C9, 0xFE25D0BE,
 189         0x195CDA43, 0x0AFE4234, 0x3E19EAAD, 0x2DBB72DA, 0x57D6BB9F, 0x447423E8, 0x70938B71, 0x63311306,
 190         0xBB8DE87A, 0xA82F700D, 0x9CC8D894, 0x8F6A40E3, 0xF50789A6, 0xE6A511D1, 0xD242B948, 0xC1E0213F,
 191         0x26992BC2, 0x353BB3B5, 0x01DC1B2C, 0x127E835B, 0x68134A1E, 0x7BB1D269, 0x4F567AF0, 0x5CF4E287,
 192         0x04D43CFD, 0x1776A48A, 0x23910C13, 0x30339464, 0x4A5E5D21, 0x59FCC556, 0x6D1B6DCF, 0x7EB9F5B8,
 193         0x99C0FF45, 0x8A626732, 0xBE85CFAB, 0xAD2757DC, 0xD74A9E99, 0xC4E806EE, 0xF00FAE77, 0xE3AD3600,
 194         0x3B11CD7C, 0x28B3550B, 0x1C54FD92, 0x0FF665E5, 0x759BACA0, 0x663934D7, 0x52DE9C4E, 0x417C0439,
 195         0xA6050EC4, 0xB5A796B3, 0x81403E2A, 0x92E2A65D, 0xE88F6F18, 0xFB2DF76F, 0xCFCA5FF6, 0xDC68C781,
 196         0x7B5FDFFF, 0x68FD4788, 0x5C1AEF11, 0x4FB87766, 0x35D5BE23, 0x26772654, 0x12908ECD, 0x013216BA,
 197         0xE64B1C47, 0xF5E98430, 0xC10E2CA9, 0xD2ACB4DE, 0xA8C17D9B, 0xBB63E5EC, 0x8F844D75, 0x9C26D502,
 198         0x449A2E7E, 0x5738B609, 0x63DF1E90, 0x707D86E7, 0x0A104FA2, 0x19B2D7D5, 0x2D557F4C, 0x3EF7E73B,
 199         0xD98EEDC6, 0xCA2C75B1, 0xFECBDD28, 0xED69455F, 0x97048C1A, 0x84A6146D, 0xB041BCF4, 0xA3E32483
 200 };
 201
 202 /*
 203  * end of the CRC lookup table crc_tableil8_o40
 204  */
 205
 206
 207
 208 /*
 209  * The following CRC lookup table was generated automagically using the
 210  * following model parameters:
 211  *
 212  * Generator Polynomial = ................. 0x1EDC6F41
 213  * Generator Polynomial Length = .......... 32 bits
 214  * Reflected Bits = ....................... TRUE
 215  * Table Generation Offset = .............. 32 bits
 216  * Number of Slices = ..................... 8 slices
 217  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 218  * Directory Name = ....................... .\
 219  * File Name = ............................ 8x256_tables.c
 220  */
 221
 222 static const uint32_t sctp_crc_tableil8_o48[256] =
 223 {
 224         0x00000000, 0xA541927E, 0x4F6F520D, 0xEA2EC073, 0x9EDEA41A, 0x3B9F3664, 0xD1B1F617, 0x74F06469,
 225         0x38513EC5, 0x9D10ACBB, 0x773E6CC8, 0xD27FFEB6, 0xA68F9ADF, 0x03CE08A1, 0xE9E0C8D2, 0x4CA15AAC,
 226         0x70A27D8A, 0xD5E3EFF4, 0x3FCD2F87, 0x9A8CBDF9, 0xEE7CD990, 0x4B3D4BEE, 0xA1138B9D, 0x045219E3,
 227         0x48F3434F, 0xEDB2D131, 0x079C1142, 0xA2DD833C, 0xD62DE755, 0x736C752B, 0x9942B558, 0x3C032726,
 228         0xE144FB14, 0x4405696A, 0xAE2BA919, 0x0B6A3B67, 0x7F9A5F0E, 0xDADBCD70, 0x30F50D03, 0x95B49F7D,
 229         0xD915C5D1, 0x7C5457AF, 0x967A97DC, 0x333B05A2, 0x47CB61CB, 0xE28AF3B5, 0x08A433C6, 0xADE5A1B8,
 230         0x91E6869E, 0x34A714E0, 0xDE89D493, 0x7BC846ED, 0x0F382284, 0xAA79B0FA, 0x40577089, 0xE516E2F7,
 231         0xA9B7B85B, 0x0CF62A25, 0xE6D8EA56, 0x43997828, 0x37691C41, 0x92288E3F, 0x78064E4C, 0xDD47DC32,
 232         0xC76580D9, 0x622412A7, 0x880AD2D4, 0x2D4B40AA, 0x59BB24C3, 0xFCFAB6BD, 0x16D476CE, 0xB395E4B0,
 233         0xFF34BE1C, 0x5A752C62, 0xB05BEC11, 0x151A7E6F, 0x61EA1A06, 0xC4AB8878, 0x2E85480B, 0x8BC4DA75,
 234         0xB7C7FD53, 0x12866F2D, 0xF8A8AF5E, 0x5DE93D20, 0x29195949, 0x8C58CB37, 0x66760B44, 0xC337993A,
 235         0x8F96C396, 0x2AD751E8, 0xC0F9919B, 0x65B803E5, 0x1148678C, 0xB409F5F2, 0x5E273581, 0xFB66A7FF,
 236         0x26217BCD, 0x8360E9B3, 0x694E29C0, 0xCC0FBBBE, 0xB8FFDFD7, 0x1DBE4DA9, 0xF7908DDA, 0x52D11FA4,
 237         0x1E704508, 0xBB31D776, 0x511F1705, 0xF45E857B, 0x80AEE112, 0x25EF736C, 0xCFC1B31F, 0x6A802161,
 238         0x56830647, 0xF3C29439, 0x19EC544A, 0xBCADC634, 0xC85DA25D, 0x6D1C3023, 0x8732F050, 0x2273622E,
 239         0x6ED23882, 0xCB93AAFC, 0x21BD6A8F, 0x84FCF8F1, 0xF00C9C98, 0x554D0EE6, 0xBF63CE95, 0x1A225CEB,
 240         0x8B277743, 0x2E66E53D, 0xC448254E, 0x6109B730, 0x15F9D359, 0xB0B84127, 0x5A968154, 0xFFD7132A,
 241         0xB3764986, 0x1637DBF8, 0xFC191B8B, 0x595889F5, 0x2DA8ED9C, 0x88E97FE2, 0x62C7BF91, 0xC7862DEF,
 242         0xFB850AC9, 0x5EC498B7, 0xB4EA58C4, 0x11ABCABA, 0x655BAED3, 0xC01A3CAD, 0x2A34FCDE, 0x8F756EA0,
 243         0xC3D4340C, 0x6695A672, 0x8CBB6601, 0x29FAF47F, 0x5D0A9016, 0xF84B0268, 0x1265C21B, 0xB7245065,
 244         0x6A638C57, 0xCF221E29, 0x250CDE5A, 0x804D4C24, 0xF4BD284D, 0x51FCBA33, 0xBBD27A40, 0x1E93E83E,
 245         0x5232B292, 0xF77320EC, 0x1D5DE09F, 0xB81C72E1, 0xCCEC1688, 0x69AD84F6, 0x83834485, 0x26C2D6FB,
 246         0x1AC1F1DD, 0xBF8063A3, 0x55AEA3D0, 0xF0EF31AE, 0x841F55C7, 0x215EC7B9, 0xCB7007CA, 0x6E3195B4,
 247         0x2290CF18, 0x87D15D66, 0x6DFF9D15, 0xC8BE0F6B, 0xBC4E6B02, 0x190FF97C, 0xF321390F, 0x5660AB71,
 248         0x4C42F79A, 0xE90365E4, 0x032DA597, 0xA66C37E9, 0xD29C5380, 0x77DDC1FE, 0x9DF3018D, 0x38B293F3,
 249         0x7413C95F, 0xD1525B21, 0x3B7C9B52, 0x9E3D092C, 0xEACD6D45, 0x4F8CFF3B, 0xA5A23F48, 0x00E3AD36,
 250         0x3CE08A10, 0x99A1186E, 0x738FD81D, 0xD6CE4A63, 0xA23E2E0A, 0x077FBC74, 0xED517C07, 0x4810EE79,
 251         0x04B1B4D5, 0xA1F026AB, 0x4BDEE6D8, 0xEE9F74A6, 0x9A6F10CF, 0x3F2E82B1, 0xD50042C2, 0x7041D0BC,
 252         0xAD060C8E, 0x08479EF0, 0xE2695E83, 0x4728CCFD, 0x33D8A894, 0x96993AEA, 0x7CB7FA99, 0xD9F668E7,
 253         0x9557324B, 0x3016A035, 0xDA386046, 0x7F79F238, 0x0B899651, 0xAEC8042F, 0x44E6C45C, 0xE1A75622,
 254         0xDDA47104, 0x78E5E37A, 0x92CB2309, 0x378AB177, 0x437AD51E, 0xE63B4760, 0x0C158713, 0xA954156D,
 255         0xE5F54FC1, 0x40B4DDBF, 0xAA9A1DCC, 0x0FDB8FB2, 0x7B2BEBDB, 0xDE6A79A5, 0x3444B9D6, 0x91052BA8
 256 };
 257
 258 /*
 259  * end of the CRC lookup table crc_tableil8_o48
 260  */
 261
 262
 263
 264 /*
 265  * The following CRC lookup table was generated automagically using the
 266  * following model parameters:
 267  *
 268  * Generator Polynomial = ................. 0x1EDC6F41
 269  * Generator Polynomial Length = .......... 32 bits
 270  * Reflected Bits = ....................... TRUE
 271  * Table Generation Offset = .............. 32 bits
 272  * Number of Slices = ..................... 8 slices
 273  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 274  * Directory Name = ....................... .\
 275  * File Name = ............................ 8x256_tables.c
 276  */
 277
 278 static const uint32_t sctp_crc_tableil8_o56[256] =
 279 {
 280         0x00000000, 0xDD45AAB8, 0xBF672381, 0x62228939, 0x7B2231F3, 0xA6679B4B, 0xC4451272, 0x1900B8CA,
 281         0xF64463E6, 0x2B01C95E, 0x49234067, 0x9466EADF, 0x8D665215, 0x5023F8AD, 0x32017194, 0xEF44DB2C,
 282         0xE964B13D, 0x34211B85, 0x560392BC, 0x8B463804, 0x924680CE, 0x4F032A76, 0x2D21A34F, 0xF06409F7,
 283         0x1F20D2DB, 0xC2657863, 0xA047F15A, 0x7D025BE2, 0x6402E328, 0xB9474990, 0xDB65C0A9, 0x06206A11,
 284         0xD725148B, 0x0A60BE33, 0x6842370A, 0xB5079DB2, 0xAC072578, 0x71428FC0, 0x136006F9, 0xCE25AC41,
 285         0x2161776D, 0xFC24DDD5, 0x9E0654EC, 0x4343FE54, 0x5A43469E, 0x8706EC26, 0xE524651F, 0x3861CFA7,
 286         0x3E41A5B6, 0xE3040F0E, 0x81268637, 0x5C632C8F, 0x45639445, 0x98263EFD, 0xFA04B7C4, 0x27411D7C,
 287         0xC805C650, 0x15406CE8, 0x7762E5D1, 0xAA274F69, 0xB327F7A3, 0x6E625D1B, 0x0C40D422, 0xD1057E9A,
 288         0xABA65FE7, 0x76E3F55F, 0x14C17C66, 0xC984D6DE, 0xD0846E14, 0x0DC1C4AC, 0x6FE34D95, 0xB2A6E72D,
 289         0x5DE23C01, 0x80A796B9, 0xE2851F80, 0x3FC0B538, 0x26C00DF2, 0xFB85A74A, 0x99A72E73, 0x44E284CB,
 290         0x42C2EEDA, 0x9F874462, 0xFDA5CD5B, 0x20E067E3, 0x39E0DF29, 0xE4A57591, 0x8687FCA8, 0x5BC25610,
 291         0xB4868D3C, 0x69C32784, 0x0BE1AEBD, 0xD6A40405, 0xCFA4BCCF, 0x12E11677, 0x70C39F4E, 0xAD8635F6,
 292         0x7C834B6C, 0xA1C6E1D4, 0xC3E468ED, 0x1EA1C255, 0x07A17A9F, 0xDAE4D027, 0xB8C6591E, 0x6583F3A6,
 293         0x8AC7288A, 0x57828232, 0x35A00B0B, 0xE8E5A1B3, 0xF1E51979, 0x2CA0B3C1, 0x4E823AF8, 0x93C79040,
 294         0x95E7FA51, 0x48A250E9, 0x2A80D9D0, 0xF7C57368, 0xEEC5CBA2, 0x3380611A, 0x51A2E823, 0x8CE7429B,
 295         0x63A399B7, 0xBEE6330F, 0xDCC4BA36, 0x0181108E, 0x1881A844, 0xC5C402FC, 0xA7E68BC5, 0x7AA3217D,
 296         0x52A0C93F, 0x8FE56387, 0xEDC7EABE, 0x30824006, 0x2982F8CC, 0xF4C75274, 0x96E5DB4D, 0x4BA071F5,
 297         0xA4E4AAD9, 0x79A10061, 0x1B838958, 0xC6C623E0, 0xDFC69B2A, 0x02833192, 0x60A1B8AB, 0xBDE41213,
 298         0xBBC47802, 0x6681D2BA, 0x04A35B83, 0xD9E6F13B, 0xC0E649F1, 0x1DA3E349, 0x7F816A70, 0xA2C4C0C8,
 299         0x4D801BE4, 0x90C5B15C, 0xF2E73865, 0x2FA292DD, 0x36A22A17, 0xEBE780AF, 0x89C50996, 0x5480A32E,
 300         0x8585DDB4, 0x58C0770C, 0x3AE2FE35, 0xE7A7548D, 0xFEA7EC47, 0x23E246FF, 0x41C0CFC6, 0x9C85657E,
 301         0x73C1BE52, 0xAE8414EA, 0xCCA69DD3, 0x11E3376B, 0x08E38FA1, 0xD5A62519, 0xB784AC20, 0x6AC10698,
 302         0x6CE16C89, 0xB1A4C631, 0xD3864F08, 0x0EC3E5B0, 0x17C35D7A, 0xCA86F7C2, 0xA8A47EFB, 0x75E1D443,
 303         0x9AA50F6F, 0x47E0A5D7, 0x25C22CEE, 0xF8878656, 0xE1873E9C, 0x3CC29424, 0x5EE01D1D, 0x83A5B7A5,
 304         0xF90696D8, 0x24433C60, 0x4661B559, 0x9B241FE1, 0x8224A72B, 0x5F610D93, 0x3D4384AA, 0xE0062E12,
 305         0x0F42F53E, 0xD2075F86, 0xB025D6BF, 0x6D607C07, 0x7460C4CD, 0xA9256E75, 0xCB07E74C, 0x16424DF4,
 306         0x106227E5, 0xCD278D5D, 0xAF050464, 0x7240AEDC, 0x6B401616, 0xB605BCAE, 0xD4273597, 0x09629F2F,
 307         0xE6264403, 0x3B63EEBB, 0x59416782, 0x8404CD3A, 0x9D0475F0, 0x4041DF48, 0x22635671, 0xFF26FCC9,
 308         0x2E238253, 0xF36628EB, 0x9144A1D2, 0x4C010B6A, 0x5501B3A0, 0x88441918, 0xEA669021, 0x37233A99,
 309         0xD867E1B5, 0x05224B0D, 0x6700C234, 0xBA45688C, 0xA345D046, 0x7E007AFE, 0x1C22F3C7, 0xC167597F,
 310         0xC747336E, 0x1A0299D6, 0x782010EF, 0xA565BA57, 0xBC65029D, 0x6120A825, 0x0302211C, 0xDE478BA4,
 311         0x31035088, 0xEC46FA30, 0x8E647309, 0x5321D9B1, 0x4A21617B, 0x9764CBC3, 0xF54642FA, 0x2803E842
 312 };
 313
 314 /*
 315  * end of the CRC lookup table crc_tableil8_o56
 316  */
 317
 318
 319
 320 /*
 321  * The following CRC lookup table was generated automagically using the
 322  * following model parameters:
 323  *
 324  * Generator Polynomial = ................. 0x1EDC6F41
 325  * Generator Polynomial Length = .......... 32 bits
 326  * Reflected Bits = ....................... TRUE
 327  * Table Generation Offset = .............. 32 bits
 328  * Number of Slices = ..................... 8 slices
 329  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 330  * Directory Name = ....................... .\
 331  * File Name = ............................ 8x256_tables.c
 332  */
 333
 334 static const uint32_t sctp_crc_tableil8_o64[256] =
 335 {
 336         0x00000000, 0x38116FAC, 0x7022DF58, 0x4833B0F4, 0xE045BEB0, 0xD854D11C, 0x906761E8, 0xA8760E44,
 337         0xC5670B91, 0xFD76643D, 0xB545D4C9, 0x8D54BB65, 0x2522B521, 0x1D33DA8D, 0x55006A79, 0x6D1105D5,
 338         0x8F2261D3, 0xB7330E7F, 0xFF00BE8B, 0xC711D127, 0x6F67DF63, 0x5776B0CF, 0x1F45003B, 0x27546F97,
 339         0x4A456A42, 0x725405EE, 0x3A67B51A, 0x0276DAB6, 0xAA00D4F2, 0x9211BB5E, 0xDA220BAA, 0xE2336406,
 340         0x1BA8B557, 0x23B9DAFB, 0x6B8A6A0F, 0x539B05A3, 0xFBED0BE7, 0xC3FC644B, 0x8BCFD4BF, 0xB3DEBB13,
 341         0xDECFBEC6, 0xE6DED16A, 0xAEED619E, 0x96FC0E32, 0x3E8A0076, 0x069B6FDA, 0x4EA8DF2E, 0x76B9B082,
 342         0x948AD484, 0xAC9BBB28, 0xE4A80BDC, 0xDCB96470, 0x74CF6A34, 0x4CDE0598, 0x04EDB56C, 0x3CFCDAC0,
 343         0x51EDDF15, 0x69FCB0B9, 0x21CF004D, 0x19DE6FE1, 0xB1A861A5, 0x89B90E09, 0xC18ABEFD, 0xF99BD151,
 344         0x37516AAE, 0x0F400502, 0x4773B5F6, 0x7F62DA5A, 0xD714D41E, 0xEF05BBB2, 0xA7360B46, 0x9F2764EA,
 345         0xF236613F, 0xCA270E93, 0x8214BE67, 0xBA05D1CB, 0x1273DF8F, 0x2A62B023, 0x625100D7, 0x5A406F7B,
 346         0xB8730B7D, 0x806264D1, 0xC851D425, 0xF040BB89, 0x5836B5CD, 0x6027DA61, 0x28146A95, 0x10050539,
 347         0x7D1400EC, 0x45056F40, 0x0D36DFB4, 0x3527B018, 0x9D51BE5C, 0xA540D1F0, 0xED736104, 0xD5620EA8,
 348         0x2CF9DFF9, 0x14E8B055, 0x5CDB00A1, 0x64CA6F0D, 0xCCBC6149, 0xF4AD0EE5, 0xBC9EBE11, 0x848FD1BD,
 349         0xE99ED468, 0xD18FBBC4, 0x99BC0B30, 0xA1AD649C, 0x09DB6AD8, 0x31CA0574, 0x79F9B580, 0x41E8DA2C,
 350         0xA3DBBE2A, 0x9BCAD186, 0xD3F96172, 0xEBE80EDE, 0x439E009A, 0x7B8F6F36, 0x33BCDFC2, 0x0BADB06E,
 351         0x66BCB5BB, 0x5EADDA17, 0x169E6AE3, 0x2E8F054F, 0x86F90B0B, 0xBEE864A7, 0xF6DBD453, 0xCECABBFF,
 352         0x6EA2D55C, 0x56B3BAF0, 0x1E800A04, 0x269165A8, 0x8EE76BEC, 0xB6F60440, 0xFEC5B4B4, 0xC6D4DB18,
 353         0xABC5DECD, 0x93D4B161, 0xDBE70195, 0xE3F66E39, 0x4B80607D, 0x73910FD1, 0x3BA2BF25, 0x03B3D089,
 354         0xE180B48F, 0xD991DB23, 0x91A26BD7, 0xA9B3047B, 0x01C50A3F, 0x39D46593, 0x71E7D567, 0x49F6BACB,
 355         0x24E7BF1E, 0x1CF6D0B2, 0x54C56046, 0x6CD40FEA, 0xC4A201AE, 0xFCB36E02, 0xB480DEF6, 0x8C91B15A,
 356         0x750A600B, 0x4D1B0FA7, 0x0528BF53, 0x3D39D0FF, 0x954FDEBB, 0xAD5EB117, 0xE56D01E3, 0xDD7C6E4F,
 357         0xB06D6B9A, 0x887C0436, 0xC04FB4C2, 0xF85EDB6E, 0x5028D52A, 0x6839BA86, 0x200A0A72, 0x181B65DE,
 358         0xFA2801D8, 0xC2396E74, 0x8A0ADE80, 0xB21BB12C, 0x1A6DBF68, 0x227CD0C4, 0x6A4F6030, 0x525E0F9C,
 359         0x3F4F0A49, 0x075E65E5, 0x4F6DD511, 0x777CBABD, 0xDF0AB4F9, 0xE71BDB55, 0xAF286BA1, 0x9739040D,
 360         0x59F3BFF2, 0x61E2D05E, 0x29D160AA, 0x11C00F06, 0xB9B60142, 0x81A76EEE, 0xC994DE1A, 0xF185B1B6,
 361         0x9C94B463, 0xA485DBCF, 0xECB66B3B, 0xD4A70497, 0x7CD10AD3, 0x44C0657F, 0x0CF3D58B, 0x34E2BA27,
 362         0xD6D1DE21, 0xEEC0B18D, 0xA6F30179, 0x9EE26ED5, 0x36946091, 0x0E850F3D, 0x46B6BFC9, 0x7EA7D065,
 363         0x13B6D5B0, 0x2BA7BA1C, 0x63940AE8, 0x5B856544, 0xF3F36B00, 0xCBE204AC, 0x83D1B458, 0xBBC0DBF4,
 364         0x425B0AA5, 0x7A4A6509, 0x3279D5FD, 0x0A68BA51, 0xA21EB415, 0x9A0FDBB9, 0xD23C6B4D, 0xEA2D04E1,
 365         0x873C0134, 0xBF2D6E98, 0xF71EDE6C, 0xCF0FB1C0, 0x6779BF84, 0x5F68D028, 0x175B60DC, 0x2F4A0F70,
 366         0xCD796B76, 0xF56804DA, 0xBD5BB42E, 0x854ADB82, 0x2D3CD5C6, 0x152DBA6A, 0x5D1E0A9E, 0x650F6532,
 367         0x081E60E7, 0x300F0F4B, 0x783CBFBF, 0x402DD013, 0xE85BDE57, 0xD04AB1FB, 0x9879010F, 0xA0686EA3
 368 };
 369
 370 /*
 371  * end of the CRC lookup table crc_tableil8_o64
 372  */
 373
 374
 375
 376 /*
 377  * The following CRC lookup table was generated automagically using the
 378  * following model parameters:
 379  *
 380  * Generator Polynomial = ................. 0x1EDC6F41
 381  * Generator Polynomial Length = .......... 32 bits
 382  * Reflected Bits = ....................... TRUE
 383  * Table Generation Offset = .............. 32 bits
 384  * Number of Slices = ..................... 8 slices
 385  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 386  * Directory Name = ....................... .\
 387  * File Name = ............................ 8x256_tables.c
 388  */
 389
 390 static const uint32_t sctp_crc_tableil8_o72[256] =
 391 {
 392         0x00000000, 0xEF306B19, 0xDB8CA0C3, 0x34BCCBDA, 0xB2F53777, 0x5DC55C6E, 0x697997B4, 0x8649FCAD,
 393         0x6006181F, 0x8F367306, 0xBB8AB8DC, 0x54BAD3C5, 0xD2F32F68, 0x3DC34471, 0x097F8FAB, 0xE64FE4B2,
 394         0xC00C303E, 0x2F3C5B27, 0x1B8090FD, 0xF4B0FBE4, 0x72F90749, 0x9DC96C50, 0xA975A78A, 0x4645CC93,
 395         0xA00A2821, 0x4F3A4338, 0x7B8688E2, 0x94B6E3FB, 0x12FF1F56, 0xFDCF744F, 0xC973BF95, 0x2643D48C,
 396         0x85F4168D, 0x6AC47D94, 0x5E78B64E, 0xB148DD57, 0x370121FA, 0xD8314AE3, 0xEC8D8139, 0x03BDEA20,
 397         0xE5F20E92, 0x0AC2658B, 0x3E7EAE51, 0xD14EC548, 0x570739E5, 0xB83752FC, 0x8C8B9926, 0x63BBF23F,
 398         0x45F826B3, 0xAAC84DAA, 0x9E748670, 0x7144ED69, 0xF70D11C4, 0x183D7ADD, 0x2C81B107, 0xC3B1DA1E,
 399         0x25FE3EAC, 0xCACE55B5, 0xFE729E6F, 0x1142F576, 0x970B09DB, 0x783B62C2, 0x4C87A918, 0xA3B7C201,
 400         0x0E045BEB, 0xE13430F2, 0xD588FB28, 0x3AB89031, 0xBCF16C9C, 0x53C10785, 0x677DCC5F, 0x884DA746,
 401         0x6E0243F4, 0x813228ED, 0xB58EE337, 0x5ABE882E, 0xDCF77483, 0x33C71F9A, 0x077BD440, 0xE84BBF59,
 402         0xCE086BD5, 0x213800CC, 0x1584CB16, 0xFAB4A00F, 0x7CFD5CA2, 0x93CD37BB, 0xA771FC61, 0x48419778,
 403         0xAE0E73CA, 0x413E18D3, 0x7582D309, 0x9AB2B810, 0x1CFB44BD, 0xF3CB2FA4, 0xC777E47E, 0x28478F67,
 404         0x8BF04D66, 0x64C0267F, 0x507CEDA5, 0xBF4C86BC, 0x39057A11, 0xD6351108, 0xE289DAD2, 0x0DB9B1CB,
 405         0xEBF65579, 0x04C63E60, 0x307AF5BA, 0xDF4A9EA3, 0x5903620E, 0xB6330917, 0x828FC2CD, 0x6DBFA9D4,
 406         0x4BFC7D58, 0xA4CC1641, 0x9070DD9B, 0x7F40B682, 0xF9094A2F, 0x16392136, 0x2285EAEC, 0xCDB581F5,
 407         0x2BFA6547, 0xC4CA0E5E, 0xF076C584, 0x1F46AE9D, 0x990F5230, 0x763F3929, 0x4283F2F3, 0xADB399EA,
 408         0x1C08B7D6, 0xF338DCCF, 0xC7841715, 0x28B47C0C, 0xAEFD80A1, 0x41CDEBB8, 0x75712062, 0x9A414B7B,
 409         0x7C0EAFC9, 0x933EC4D0, 0xA7820F0A, 0x48B26413, 0xCEFB98BE, 0x21CBF3A7, 0x1577387D, 0xFA475364,
 410         0xDC0487E8, 0x3334ECF1, 0x0788272B, 0xE8B84C32, 0x6EF1B09F, 0x81C1DB86, 0xB57D105C, 0x5A4D7B45,
 411         0xBC029FF7, 0x5332F4EE, 0x678E3F34, 0x88BE542D, 0x0EF7A880, 0xE1C7C399, 0xD57B0843, 0x3A4B635A,
 412         0x99FCA15B, 0x76CCCA42, 0x42700198, 0xAD406A81, 0x2B09962C, 0xC439FD35, 0xF08536EF, 0x1FB55DF6,
 413         0xF9FAB944, 0x16CAD25D, 0x22761987, 0xCD46729E, 0x4B0F8E33, 0xA43FE52A, 0x90832EF0, 0x7FB345E9,
 414         0x59F09165, 0xB6C0FA7C, 0x827C31A6, 0x6D4C5ABF, 0xEB05A612, 0x0435CD0B, 0x308906D1, 0xDFB96DC8,
 415         0x39F6897A, 0xD6C6E263, 0xE27A29B9, 0x0D4A42A0, 0x8B03BE0D, 0x6433D514, 0x508F1ECE, 0xBFBF75D7,
 416         0x120CEC3D, 0xFD3C8724, 0xC9804CFE, 0x26B027E7, 0xA0F9DB4A, 0x4FC9B053, 0x7B757B89, 0x94451090,
 417         0x720AF422, 0x9D3A9F3B, 0xA98654E1, 0x46B63FF8, 0xC0FFC355, 0x2FCFA84C, 0x1B736396, 0xF443088F,
 418         0xD200DC03, 0x3D30B71A, 0x098C7CC0, 0xE6BC17D9, 0x60F5EB74, 0x8FC5806D, 0xBB794BB7, 0x544920AE,
 419         0xB206C41C, 0x5D36AF05, 0x698A64DF, 0x86BA0FC6, 0x00F3F36B, 0xEFC39872, 0xDB7F53A8, 0x344F38B1,
 420         0x97F8FAB0, 0x78C891A9, 0x4C745A73, 0xA344316A, 0x250DCDC7, 0xCA3DA6DE, 0xFE816D04, 0x11B1061D,
 421         0xF7FEE2AF, 0x18CE89B6, 0x2C72426C, 0xC3422975, 0x450BD5D8, 0xAA3BBEC1, 0x9E87751B, 0x71B71E02,
 422         0x57F4CA8E, 0xB8C4A197, 0x8C786A4D, 0x63480154, 0xE501FDF9, 0x0A3196E0, 0x3E8D5D3A, 0xD1BD3623,
 423         0x37F2D291, 0xD8C2B988, 0xEC7E7252, 0x034E194B, 0x8507E5E6, 0x6A378EFF, 0x5E8B4525, 0xB1BB2E3C
 424 };
 425
 426 /*
 427  * end of the CRC lookup table crc_tableil8_o72
 428  */
 429
 430
 431
 432 /*
 433  * The following CRC lookup table was generated automagically using the
 434  * following model parameters:
 435  *
 436  * Generator Polynomial = ................. 0x1EDC6F41
 437  * Generator Polynomial Length = .......... 32 bits
 438  * Reflected Bits = ....................... TRUE
 439  * Table Generation Offset = .............. 32 bits
 440  * Number of Slices = ..................... 8 slices
 441  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 442  * Directory Name = ....................... .\
 443  * File Name = ............................ 8x256_tables.c
 444  */
 445
 446 static const uint32_t sctp_crc_tableil8_o80[256] =
 447 {
 448         0x00000000, 0x68032CC8, 0xD0065990, 0xB8057558, 0xA5E0C5D1, 0xCDE3E919, 0x75E69C41, 0x1DE5B089,
 449         0x4E2DFD53, 0x262ED19B, 0x9E2BA4C3, 0xF628880B, 0xEBCD3882, 0x83CE144A, 0x3BCB6112, 0x53C84DDA,
 450         0x9C5BFAA6, 0xF458D66E, 0x4C5DA336, 0x245E8FFE, 0x39BB3F77, 0x51B813BF, 0xE9BD66E7, 0x81BE4A2F,
 451         0xD27607F5, 0xBA752B3D, 0x02705E65, 0x6A7372AD, 0x7796C224, 0x1F95EEEC, 0xA7909BB4, 0xCF93B77C,
 452         0x3D5B83BD, 0x5558AF75, 0xED5DDA2D, 0x855EF6E5, 0x98BB466C, 0xF0B86AA4, 0x48BD1FFC, 0x20BE3334,
 453         0x73767EEE, 0x1B755226, 0xA370277E, 0xCB730BB6, 0xD696BB3F, 0xBE9597F7, 0x0690E2AF, 0x6E93CE67,
 454         0xA100791B, 0xC90355D3, 0x7106208B, 0x19050C43, 0x04E0BCCA, 0x6CE39002, 0xD4E6E55A, 0xBCE5C992,
 455         0xEF2D8448, 0x872EA880, 0x3F2BDDD8, 0x5728F110, 0x4ACD4199, 0x22CE6D51, 0x9ACB1809, 0xF2C834C1,
 456         0x7AB7077A, 0x12B42BB2, 0xAAB15EEA, 0xC2B27222, 0xDF57C2AB, 0xB754EE63, 0x0F519B3B, 0x6752B7F3,
 457         0x349AFA29, 0x5C99D6E1, 0xE49CA3B9, 0x8C9F8F71, 0x917A3FF8, 0xF9791330, 0x417C6668, 0x297F4AA0,
 458         0xE6ECFDDC, 0x8EEFD114, 0x36EAA44C, 0x5EE98884, 0x430C380D, 0x2B0F14C5, 0x930A619D, 0xFB094D55,
 459         0xA8C1008F, 0xC0C22C47, 0x78C7591F, 0x10C475D7, 0x0D21C55E, 0x6522E996, 0xDD279CCE, 0xB524B006,
 460         0x47EC84C7, 0x2FEFA80F, 0x97EADD57, 0xFFE9F19F, 0xE20C4116, 0x8A0F6DDE, 0x320A1886, 0x5A09344E,
 461         0x09C17994, 0x61C2555C, 0xD9C72004, 0xB1C40CCC, 0xAC21BC45, 0xC422908D, 0x7C27E5D5, 0x1424C91D,
 462         0xDBB77E61, 0xB3B452A9, 0x0BB127F1, 0x63B20B39, 0x7E57BBB0, 0x16549778, 0xAE51E220, 0xC652CEE8,
 463         0x959A8332, 0xFD99AFFA, 0x459CDAA2, 0x2D9FF66A, 0x307A46E3, 0x58796A2B, 0xE07C1F73, 0x887F33BB,
 464         0xF56E0EF4, 0x9D6D223C, 0x25685764, 0x4D6B7BAC, 0x508ECB25, 0x388DE7ED, 0x808892B5, 0xE88BBE7D,
 465         0xBB43F3A7, 0xD340DF6F, 0x6B45AA37, 0x034686FF, 0x1EA33676, 0x76A01ABE, 0xCEA56FE6, 0xA6A6432E,
 466         0x6935F452, 0x0136D89A, 0xB933ADC2, 0xD130810A, 0xCCD53183, 0xA4D61D4B, 0x1CD36813, 0x74D044DB,
 467         0x27180901, 0x4F1B25C9, 0xF71E5091, 0x9F1D7C59, 0x82F8CCD0, 0xEAFBE018, 0x52FE9540, 0x3AFDB988,
 468         0xC8358D49, 0xA036A181, 0x1833D4D9, 0x7030F811, 0x6DD54898, 0x05D66450, 0xBDD31108, 0xD5D03DC0,
 469         0x8618701A, 0xEE1B5CD2, 0x561E298A, 0x3E1D0542, 0x23F8B5CB, 0x4BFB9903, 0xF3FEEC5B, 0x9BFDC093,
 470         0x546E77EF, 0x3C6D5B27, 0x84682E7F, 0xEC6B02B7, 0xF18EB23E, 0x998D9EF6, 0x2188EBAE, 0x498BC766,
 471         0x1A438ABC, 0x7240A674, 0xCA45D32C, 0xA246FFE4, 0xBFA34F6D, 0xD7A063A5, 0x6FA516FD, 0x07A63A35,
 472         0x8FD9098E, 0xE7DA2546, 0x5FDF501E, 0x37DC7CD6, 0x2A39CC5F, 0x423AE097, 0xFA3F95CF, 0x923CB907,
 473         0xC1F4F4DD, 0xA9F7D815, 0x11F2AD4D, 0x79F18185, 0x6414310C, 0x0C171DC4, 0xB412689C, 0xDC114454,
 474         0x1382F328, 0x7B81DFE0, 0xC384AAB8, 0xAB878670, 0xB66236F9, 0xDE611A31, 0x66646F69, 0x0E6743A1,
 475         0x5DAF0E7B, 0x35AC22B3, 0x8DA957EB, 0xE5AA7B23, 0xF84FCBAA, 0x904CE762, 0x2849923A, 0x404ABEF2,
 476         0xB2828A33, 0xDA81A6FB, 0x6284D3A3, 0x0A87FF6B, 0x17624FE2, 0x7F61632A, 0xC7641672, 0xAF673ABA,
 477         0xFCAF7760, 0x94AC5BA8, 0x2CA92EF0, 0x44AA0238, 0x594FB2B1, 0x314C9E79, 0x8949EB21, 0xE14AC7E9,
 478         0x2ED97095, 0x46DA5C5D, 0xFEDF2905, 0x96DC05CD, 0x8B39B544, 0xE33A998C, 0x5B3FECD4, 0x333CC01C,
 479         0x60F48DC6, 0x08F7A10E, 0xB0F2D456, 0xD8F1F89E, 0xC5144817, 0xAD1764DF, 0x15121187, 0x7D113D4F
 480 };
 481
 482 /*
 483  * end of the CRC lookup table crc_tableil8_o80
 484  */
 485
 486
 487
 488 /*
 489  * The following CRC lookup table was generated automagically using the
 490  * following model parameters:
 491  *
 492  * Generator Polynomial = ................. 0x1EDC6F41
 493  * Generator Polynomial Length = .......... 32 bits
 494  * Reflected Bits = ....................... TRUE
 495  * Table Generation Offset = .............. 32 bits
 496  * Number of Slices = ..................... 8 slices
 497  * Slice Lengths = ........................ 8 8 8 8 8 8 8 8
 498  * Directory Name = ....................... .\
 499  * File Name = ............................ 8x256_tables.c
 500  */
 501
 502 static const uint32_t sctp_crc_tableil8_o88[256] =
 503 {
 504         0x00000000, 0x493C7D27, 0x9278FA4E, 0xDB448769, 0x211D826D, 0x6821FF4A, 0xB3657823, 0xFA590504,
 505         0x423B04DA, 0x0B0779FD, 0xD043FE94, 0x997F83B3, 0x632686B7, 0x2A1AFB90, 0xF15E7CF9, 0xB86201DE,
 506         0x847609B4, 0xCD4A7493, 0x160EF3FA, 0x5F328EDD, 0xA56B8BD9, 0xEC57F6FE, 0x37137197, 0x7E2F0CB0,
 507         0xC64D0D6E, 0x8F717049, 0x5435F720, 0x1D098A07, 0xE7508F03, 0xAE6CF224, 0x7528754D, 0x3C14086A,
 508         0x0D006599, 0x443C18BE, 0x9F789FD7, 0xD644E2F0, 0x2C1DE7F4, 0x65219AD3, 0xBE651DBA, 0xF759609D,
 509         0x4F3B6143, 0x06071C64, 0xDD439B0D, 0x947FE62A, 0x6E26E32E, 0x271A9E09, 0xFC5E1960, 0xB5626447,
 510         0x89766C2D, 0xC04A110A, 0x1B0E9663, 0x5232EB44, 0xA86BEE40, 0xE1579367, 0x3A13140E, 0x732F6929,
 511         0xCB4D68F7, 0x827115D0, 0x593592B9, 0x1009EF9E, 0xEA50EA9A, 0xA36C97BD, 0x782810D4, 0x31146DF3,
 512         0x1A00CB32, 0x533CB615, 0x8878317C, 0xC1444C5B, 0x3B1D495F, 0x72213478, 0xA965B311, 0xE059CE36,
 513         0x583BCFE8, 0x1107B2CF, 0xCA4335A6, 0x837F4881, 0x79264D85, 0x301A30A2, 0xEB5EB7CB, 0xA262CAEC,
 514         0x9E76C286, 0xD74ABFA1, 0x0C0E38C8, 0x453245EF, 0xBF6B40EB, 0xF6573DCC, 0x2D13BAA5, 0x642FC782,
 515         0xDC4DC65C, 0x9571BB7B, 0x4E353C12, 0x07094135, 0xFD504431, 0xB46C3916, 0x6F28BE7F, 0x2614C358,
 516         0x1700AEAB, 0x5E3CD38C, 0x857854E5, 0xCC4429C2, 0x361D2CC6, 0x7F2151E1, 0xA465D688, 0xED59ABAF,
 517         0x553BAA71, 0x1C07D756, 0xC743503F, 0x8E7F2D18, 0x7426281C, 0x3D1A553B, 0xE65ED252, 0xAF62AF75,
 518         0x9376A71F, 0xDA4ADA38, 0x010E5D51, 0x48322076, 0xB26B2572, 0xFB575855, 0x2013DF3C, 0x692FA21B,
 519         0xD14DA3C5, 0x9871DEE2, 0x4335598B, 0x0A0924AC, 0xF05021A8, 0xB96C5C8F, 0x6228DBE6, 0x2B14A6C1,
 520         0x34019664, 0x7D3DEB43, 0xA6796C2A, 0xEF45110D, 0x151C1409, 0x5C20692E, 0x8764EE47, 0xCE589360,
 521         0x763A92BE, 0x3F06EF99, 0xE44268F0, 0xAD7E15D7, 0x572710D3, 0x1E1B6DF4, 0xC55FEA9D, 0x8C6397BA,
 522         0xB0779FD0, 0xF94BE2F7, 0x220F659E, 0x6B3318B9, 0x916A1DBD, 0xD856609A, 0x0312E7F3, 0x4A2E9AD4,
 523         0xF24C9B0A, 0xBB70E62D, 0x60346144, 0x29081C63, 0xD3511967, 0x9A6D6440, 0x4129E329, 0x08159E0E,
 524         0x3901F3FD, 0x703D8EDA, 0xAB7909B3, 0xE2457494, 0x181C7190, 0x51200CB7, 0x8A648BDE, 0xC358F6F9,
 525         0x7B3AF727, 0x32068A00, 0xE9420D69, 0xA07E704E, 0x5A27754A, 0x131B086D, 0xC85F8F04, 0x8163F223,
 526         0xBD77FA49, 0xF44B876E, 0x2F0F0007, 0x66337D20, 0x9C6A7824, 0xD5560503, 0x0E12826A, 0x472EFF4D,
 527         0xFF4CFE93, 0xB67083B4, 0x6D3404DD, 0x240879FA, 0xDE517CFE, 0x976D01D9, 0x4C2986B0, 0x0515FB97,
 528         0x2E015D56, 0x673D2071, 0xBC79A718, 0xF545DA3F, 0x0F1CDF3B, 0x4620A21C, 0x9D642575, 0xD4585852,
 529         0x6C3A598C, 0x250624AB, 0xFE42A3C2, 0xB77EDEE5, 0x4D27DBE1, 0x041BA6C6, 0xDF5F21AF, 0x96635C88,
 530         0xAA7754E2, 0xE34B29C5, 0x380FAEAC, 0x7133D38B, 0x8B6AD68F, 0xC256ABA8, 0x19122CC1, 0x502E51E6,
 531         0xE84C5038, 0xA1702D1F, 0x7A34AA76, 0x3308D751, 0xC951D255, 0x806DAF72, 0x5B29281B, 0x1215553C,
 532         0x230138CF, 0x6A3D45E8, 0xB179C281, 0xF845BFA6, 0x021CBAA2, 0x4B20C785, 0x906440EC, 0xD9583DCB,
 533         0x613A3C15, 0x28064132, 0xF342C65B, 0xBA7EBB7C, 0x4027BE78, 0x091BC35F, 0xD25F4436, 0x9B633911,
 534         0xA777317B, 0xEE4B4C5C, 0x350FCB35, 0x7C33B612, 0x866AB316, 0xCF56CE31, 0x14124958, 0x5D2E347F,
 535         0xE54C35A1, 0xAC704886, 0x7734CFEF, 0x3E08B2C8, 0xC451B7CC, 0x8D6DCAEB, 0x56294D82, 0x1F1530A5
 536 };
 537
 538 /*
 539  * end of the CRC lookup table crc_tableil8_o88
 540  */
 541
 542
 543 static uint32_t
 544 sctp_crc32c_sb8_64_bit(uint32_t crc,
 545                        const unsigned char *p_buf,
 546                        uint32_t length,
 547                        uint32_t init_bytes)
 548 {
 549         uint32_t li;
 550         uint32_t term1, term2;
 551         uint32_t running_length;
 552         uint32_t end_bytes;
 553
 554         running_length = ((length - init_bytes) / 8) * 8;
 555         end_bytes = length - init_bytes - running_length;
 556
 557         for (li = 0; li < init_bytes; li++)
 558                 crc = sctp_crc_tableil8_o32[(crc ^ *p_buf++) & 0x000000FF] ^
 559                     (crc >> 8);
 560         for (li = 0; li < running_length / 8; li++) {
 561 #if BYTE_ORDER == BIG_ENDIAN
 562                 crc ^= *p_buf++;
 563                 crc ^= (*p_buf++) << 8;
 564                 crc ^= (*p_buf++) << 16;
 565                 crc ^= (*p_buf++) << 24;
 566 #else
 567                 crc ^= *(const uint32_t *) p_buf;
 568                 p_buf += 4;
 569 #endif
 570                 term1 = sctp_crc_tableil8_o88[crc & 0x000000FF] ^
 571                     sctp_crc_tableil8_o80[(crc >> 8) & 0x000000FF];
 572                 term2 = crc >> 16;
 573                 crc = term1 ^
 574                     sctp_crc_tableil8_o72[term2 & 0x000000FF] ^
 575                     sctp_crc_tableil8_o64[(term2 >> 8) & 0x000000FF];
 576
 577 #if BYTE_ORDER == BIG_ENDIAN
 578                 crc ^= sctp_crc_tableil8_o56[*p_buf++];
 579                 crc ^= sctp_crc_tableil8_o48[*p_buf++];
 580                 crc ^= sctp_crc_tableil8_o40[*p_buf++];
 581                 crc ^= sctp_crc_tableil8_o32[*p_buf++];
 582 #else
 583                 term1 = sctp_crc_tableil8_o56[(*(const uint32_t *) p_buf) & 0x000000FF] ^
 584                     sctp_crc_tableil8_o48[((*(const uint32_t *) p_buf) >> 8) & 0x000000FF];
 585
 586                 term2 = (*(const uint32_t *) p_buf) >> 16;
 587                 crc = crc ^
 588                     term1 ^
 589                     sctp_crc_tableil8_o40[term2 & 0x000000FF] ^
 590                     sctp_crc_tableil8_o32[(term2 >> 8) & 0x000000FF];
 591                 p_buf += 4;
 592 #endif
 593         }
 594         for (li = 0; li < end_bytes; li++)
 595                 crc = sctp_crc_tableil8_o32[(crc ^ *p_buf++) & 0x000000FF] ^
 596                     (crc >> 8);
 597         return (crc);
 598 }
 599
 600
 601 /**
 602  *
 603  * Routine Description:
 604  *
 605  * warms the tables
 606  *
 607  * Arguments:
 608  *
 609  *              none
 610  *
 611  * Return value:
 612  *
 613  *              none
 614  */
 615 static uint32_t
 616 multitable_crc32c(uint32_t crc32c,
 617                   const unsigned char *buffer,
 618                   unsigned int length)
 619 {
 620         uint32_t to_even_word;
 621
 622         if (length == 0) {
 623                 return (crc32c);
 624         }
 625         to_even_word = (4 - (((uintptr_t) buffer) & 0x3));
 626         return (sctp_crc32c_sb8_64_bit(crc32c, buffer, length, to_even_word));
 627 }
 628
 629 static const uint32_t sctp_crc_c[256] = {
 630         0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4,
 631         0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB,
 632         0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B,
 633         0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24,
 634         0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B,
 635         0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384,
 636         0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54,
 637         0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B,
 638         0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A,
 639         0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35,
 640         0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5,
 641         0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA,
 642         0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45,
 643         0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A,
 644         0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A,
 645         0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595,
 646         0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48,
 647         0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957,
 648         0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687,
 649         0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198,
 650         0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927,
 651         0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38,
 652         0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8,
 653         0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7,
 654         0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096,
 655         0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789,
 656         0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859,
 657         0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46,
 658         0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9,
 659         0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6,
 660         0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36,
 661         0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829,
 662         0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C,
 663         0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93,
 664         0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043,
 665         0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C,
 666         0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3,
 667         0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC,
 668         0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C,
 669         0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033,
 670         0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652,
 671         0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D,
 672         0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D,
 673         0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982,
 674         0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D,
 675         0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622,
 676         0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2,
 677         0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED,
 678         0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530,
 679         0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F,
 680         0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF,
 681         0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0,
 682         0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F,
 683         0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540,
 684         0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90,
 685         0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F,
 686         0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE,
 687         0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1,
 688         0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321,
 689         0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E,
 690         0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81,
 691         0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E,
 692         0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E,
 693         0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351,
 694 };
 695
 696
 697 #define SCTP_CRC32C(c,d) (c=(c>>8)^sctp_crc_c[(c^(d))&0xFF])
 698
 699 static uint32_t
 700 singletable_crc32c(uint32_t crc32c,
 701                    const unsigned char *buffer,
 702                    unsigned int length)
 703 {
 704         unsigned int i;
 705
 706         for (i = 0; i < length; i++) {
 707                 SCTP_CRC32C(crc32c, buffer[i]);
 708         }
 709         return (crc32c);
 710 }
 711
 712 #if defined(__Userspace__)
 713 uint32_t
 714 #else
 715 static uint32_t
 716 #endif
 717 calculate_crc32c(uint32_t crc32c,
 718                  const unsigned char *buffer,
 719                  unsigned int length)
 720 {
 721         if (length < 4) {
 722                 return (singletable_crc32c(crc32c, buffer, length));
 723         } else {
 724                 return (multitable_crc32c(crc32c, buffer, length));
 725         }
 726 }
 727
 728 #endif
 729 #if defined(__Userspace__)
 730 uint32_t
 731 #else
 732 static uint32_t
 733 #endif
 734 sctp_finalize_crc32c(uint32_t crc32c)
 735 {
 736         uint32_t result;
 737 #if BYTE_ORDER == BIG_ENDIAN
 738         uint8_t byte0, byte1, byte2, byte3;
 739 #endif
 740
 741         /* Complement the result */
 742         result = ~crc32c;
 743 #if BYTE_ORDER == BIG_ENDIAN
 744         /*
 745          * For BIG-ENDIAN platforms the result is in little-endian form. So we
 746          * must swap the bytes to return the result in network byte order.
 747          */
 748         byte0 = result & 0x000000ff;
 749         byte1 = (result >> 8) & 0x000000ff;
 750         byte2 = (result >> 16) & 0x000000ff;
 751         byte3 = (result >> 24) & 0x000000ff;
 752         crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
 753 #else
 754         /*
 755          * For LITTLE ENDIAN platforms the result is in already in network
 756          * byte order.
 757          */
 758         crc32c = result;
 759 #endif
 760         return (crc32c);
 761 }
 762
 763 /*
 764  * Compute the SCTP checksum in network byte order for a given mbuf chain m
 765  * which contains an SCTP packet starting at offset.
 766  * Since this function is also called by ipfw, don't assume that
 767  * it is compiled on a kernel with SCTP support.
 768  */
 769 uint32_t
 770 sctp_calculate_cksum(struct mbuf *m, uint32_t offset)
 771 {
 772         uint32_t base = 0xffffffff;
 773
 774         while (offset > 0) {
 775                 KASSERT(m != NULL, ("sctp_calculate_cksum, offset > length of mbuf chain"));
 776                 if (offset < (uint32_t)m->m_len) {
 777                         break;
 778                 }
 779                 offset -= m->m_len;
 780                 m = m->m_next;
 781         }
 782         if (offset > 0) {
 783                 base = calculate_crc32c(base,
 784                                         (unsigned char *)(m->m_data + offset),
 785                                         (unsigned int)(m->m_len - offset));
 786                 m = m->m_next;
 787         }
 788         while (m != NULL) {
 789                 base = calculate_crc32c(base,
 790                                         (unsigned char *)m->m_data,
 791                                         (unsigned int)m->m_len);
 792                 m = m->m_next;
 793         }
 794         base = sctp_finalize_crc32c(base);
 795         return (base);
 796 }
 797
 798 #if defined(__FreeBSD__) && !defined(__Userspace__)
 799 #if defined(SCTP) || defined(SCTP_SUPPORT)
 800
 801 VNET_DEFINE(struct sctp_base_info, system_base_info);
 802
 803 /*
 804  * Compute and insert the SCTP checksum in network byte order for a given
 805  * mbuf chain m which contains an SCTP packet starting at offset.
 806  */
 807 void
 808 sctp_delayed_cksum(struct mbuf *m, uint32_t offset)
 809 {
 810         uint32_t checksum;
 811
 812         checksum = sctp_calculate_cksum(m, offset);
 813         SCTP_STAT_DECR(sctps_sendhwcrc);
 814         SCTP_STAT_INCR(sctps_sendswcrc);
 815         offset += offsetof(struct sctphdr, checksum);
 816
 817         if (offset + sizeof(uint32_t) > (uint32_t)(m->m_pkthdr.len)) {
 818 #ifdef INVARIANTS
 819                 panic("sctp_delayed_cksum(): m->m_pkthdr.len: %d, offset: %u.",
 820                       m->m_pkthdr.len, offset);
 821 #else
 822                 SCTP_PRINTF("sctp_delayed_cksum(): m->m_pkthdr.len: %d, offset: %u.\n",
 823                             m->m_pkthdr.len, offset);
 824 #endif
 825                 return;
 826         }
 827         m_copyback(m, (int)offset, (int)sizeof(uint32_t), (caddr_t)&checksum);
 828 }
 829 #endif
 830 #endif
 831