version 1.3, 2014/01/29 14:16:54
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version 1.5, 2017/12/08 00:07:48
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Line 12 terms:
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Line 12 terms:
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All of the documentation and software included in the ELWIX and AITNET |
All of the documentation and software included in the ELWIX and AITNET |
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
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Copyright 2004 - 2014 | Copyright 2004 - 2015 |
by Michael Pounov <misho@elwix.org>. All rights reserved. |
by Michael Pounov <misho@elwix.org>. All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
Redistribution and use in source and binary forms, with or without |
Line 75 const crcPoly_t crc_Poly[] = {
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Line 75 const crcPoly_t crc_Poly[] = {
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* @crcBits = Number width bits |
* @crcBits = Number width bits |
* return: -1 error, !=-1 reflecting number |
* return: -1 error, !=-1 reflecting number |
*/ |
*/ |
inline u_int | u_int |
crcReflect(u_int crcNum, u_char crcBits) |
crcReflect(u_int crcNum, u_char crcBits) |
{ |
{ |
register u_int i, j = 1, rev = 0; |
register u_int i, j = 1, rev = 0; |
Line 97 crcReflect(u_int crcNum, u_char crcBits)
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Line 97 crcReflect(u_int crcNum, u_char crcBits)
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* @xorCRC = Last xor CRC value |
* @xorCRC = Last xor CRC value |
* return: -1 error, !=-1 CRC checksum |
* return: -1 error, !=-1 CRC checksum |
*/ |
*/ |
inline u_int | u_int |
crcCalc(u_char * __restrict psBuf, u_int bufLen, u_char crcBits, u_char RevOpts, u_int initCRC, u_int xorCRC) |
crcCalc(u_char * __restrict psBuf, u_int bufLen, u_char crcBits, u_char RevOpts, u_int initCRC, u_int xorCRC) |
{ |
{ |
const u_int bits = sizeof(int) * 8 - crcBits; |
const u_int bits = sizeof(int) * 8 - crcBits; |
Line 193 crcCalc(u_char * __restrict psBuf, u_int bufLen, u_cha
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Line 193 crcCalc(u_char * __restrict psBuf, u_int bufLen, u_cha
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* @bufLen = Length of data |
* @bufLen = Length of data |
* return: -1 error, !=-1 Checksum |
* return: -1 error, !=-1 Checksum |
*/ |
*/ |
inline u_short | u_short |
crcIP(u_char * __restrict buf, int bufLen) |
crcIP(u_char * __restrict buf, int bufLen) |
{ |
{ |
register u_int sum; |
register u_int sum; |
Line 201 crcIP(u_char * __restrict buf, int bufLen)
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Line 201 crcIP(u_char * __restrict buf, int bufLen)
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assert(buf); |
assert(buf); |
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for (sum = 0; bufLen && bufLen > 1; bufLen -= 2) | for (sum = 0; bufLen > 1; bufLen -= 2) |
sum += *nBuf++; |
sum += *nBuf++; |
if (bufLen == 1) { |
if (bufLen == 1) { |
*(u_char*)(&last) += *(u_char*) nBuf; |
*(u_char*)(&last) += *(u_char*) nBuf; |
Line 215 crcIP(u_char * __restrict buf, int bufLen)
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Line 215 crcIP(u_char * __restrict buf, int bufLen)
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} |
} |
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/* |
/* |
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* crcTCP() - Checksum for TCP v4 communication |
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* |
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* @buf = Data for calculation |
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* @bufLen = Length of data |
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* @th = TCP header |
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* return: -1 error, !=-1 Checksum |
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*/ |
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u_short |
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crcTCP(struct in_addr src, struct in_addr dst, u_char * __restrict th) |
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{ |
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struct psd_tcp { |
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struct in_addr src; |
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struct in_addr dst; |
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u_char pad; |
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u_char proto; |
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u_short tcp_len; |
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u_char tcp[20]; |
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} buf; |
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buf.src = src; |
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buf.dst = dst; |
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buf.pad = 0; |
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buf.proto = IPPROTO_TCP; |
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buf.tcp_len = htons(sizeof buf.tcp); |
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memcpy(&buf.tcp, th, sizeof buf.tcp); |
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return crcIP((u_char*) &buf, sizeof buf); |
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} |
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/* |
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* crcUDP() - Checksum for UDP v4 communication |
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* |
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* @buf = Data for calculation |
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* @bufLen = Length of data |
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* @uh = UDP header |
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* return: -1 error, !=-1 Checksum |
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*/ |
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u_short |
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crcUDP(struct in_addr src, struct in_addr dst, u_char * __restrict uh) |
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{ |
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struct psd_udp { |
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struct in_addr src; |
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struct in_addr dst; |
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u_char pad; |
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u_char proto; |
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u_short udp_len; |
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u_char udp[8]; |
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} buf; |
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buf.src = src; |
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buf.dst = dst; |
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buf.pad = 0; |
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buf.proto = IPPROTO_UDP; |
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buf.udp_len = htons(sizeof buf.udp); |
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memcpy(&buf.udp, uh, sizeof buf.udp); |
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return crcIP((u_char*) &buf, sizeof buf); |
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} |
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/* |
* crcFletcher16() - Fletcher-16 Checksum computing |
* crcFletcher16() - Fletcher-16 Checksum computing |
* |
* |
* @nBuf = Data for calculation |
* @nBuf = Data for calculation |
* @bufLen = Length of data |
* @bufLen = Length of data |
* return: -1 error, !=-1 Checksum |
* return: -1 error, !=-1 Checksum |
*/ |
*/ |
inline u_short | u_short |
crcFletcher16(u_short * __restrict nBuf, int bufLen) |
crcFletcher16(u_short * __restrict nBuf, int bufLen) |
{ |
{ |
register u_short s1, s2; |
register u_short s1, s2; |
Line 253 crcFletcher16(u_short * __restrict nBuf, int bufLen)
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Line 314 crcFletcher16(u_short * __restrict nBuf, int bufLen)
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* @bufLen = Length of data |
* @bufLen = Length of data |
* return: -1 error, !=-1 Checksum |
* return: -1 error, !=-1 Checksum |
*/ |
*/ |
inline u_int | u_int |
crcFletcher(u_short * __restrict nBuf, int bufLen) |
crcFletcher(u_short * __restrict nBuf, int bufLen) |
{ |
{ |
register u_int s1, s2, clen; |
register u_int s1, s2, clen; |
Line 284 crcFletcher(u_short * __restrict nBuf, int bufLen)
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Line 345 crcFletcher(u_short * __restrict nBuf, int bufLen)
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* @bufLen = Length of data |
* @bufLen = Length of data |
* return: -1 error, !=-1 Checksum |
* return: -1 error, !=-1 Checksum |
*/ |
*/ |
inline u_int | u_int |
crcAdler(u_char * __restrict psBuf, int bufLen) |
crcAdler(u_char * __restrict psBuf, int bufLen) |
{ |
{ |
register u_int s1 = 1, s2 = 0, clen; |
register u_int s1 = 1, s2 = 0, clen; |