libelwix/src/crc.c - diff

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Diff for /libelwix/src/crc.c between versions 1.1.1.1.22.1 and 1.4.18.1

version 1.1.1.1.22.1, 2013/07/18 14:55:42	version 1.4.18.1, 2017/12/08 00:07:13
Line 12 terms:	Line 12 terms:
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>

Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013	Copyright 2004 - 2015
by Michael Pounov <misho@elwix.org>. All rights reserved.	by Michael Pounov <misho@elwix.org>. All rights reserved.

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[] = {	Line 75 const crcPoly_t crc_Poly[] = {
* @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)	Line 97 crcReflect(u_int crcNum, u_char crcBits)
* @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	Line 193 crcCalc(u_char * __restrict psBuf, u_int bufLen, u_cha
* @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)	Line 201 crcIP(u_char * __restrict buf, int bufLen)

assert(buf);	assert(buf);

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)	Line 215 crcIP(u_char * __restrict buf, int bufLen)
}	}

/*	/*
	* crcTCP() - Checksum for TCP v4 communication
	*
	* @buf = Data for calculation
	* @bufLen = Length of data
	* @th = TCP header
	* return: -1 error, !=-1 Checksum
	*/
	u_short
	crcTCP(struct in_addr src, struct in_addr dst, u_char * __restrict th)
	{
	struct psd_tcp {
	struct in_addr src;
	struct in_addr dst;
	u_char pad;
	u_char proto;
	u_short tcp_len;
	u_char tcp[20];
	} buf;

	buf.src = src;
	buf.dst = dst;
	buf.pad = 0;
	buf.proto = IPPROTO_TCP;
	buf.tcp_len = htons(sizeof buf.tcp);
	memcpy(&buf.tcp, th, sizeof buf.tcp);

	return crcIP((u_char*) &buf, sizeof buf);
	}

	/*
	* crcUDP() - Checksum for UDP v4 communication
	*
	* @buf = Data for calculation
	* @bufLen = Length of data
	* @uh = UDP header
	* return: -1 error, !=-1 Checksum
	*/
	u_short
	crcUDP(struct in_addr src, struct in_addr dst, u_char * __restrict uh)
	{
	struct psd_udp {
	struct in_addr src;
	struct in_addr dst;
	u_char pad;
	u_char proto;
	u_short udp_len;
	u_char udp[8];
	} buf;

	buf.src = src;
	buf.dst = dst;
	buf.pad = 0;
	buf.proto = IPPROTO_UDP;
	buf.udp_len = htons(sizeof buf.udp);
	memcpy(&buf.udp, uh, sizeof buf.udp);

	return crcIP((u_char*) &buf, sizeof buf);
	}


	/*
* 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)	Line 314 crcFletcher16(u_short * __restrict nBuf, int bufLen)
* @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)	Line 345 crcFletcher(u_short * __restrict nBuf, int bufLen)
* @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;

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Removed from v.1.1.1.1.22.1
changed lines
	Added in v.1.4.18.1