1: /*************************************************************************
2: * (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitcrc.h,v 1.4 2011/04/28 20:28:20 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __AITCRC_H
47: #define __AITCRC_H
48:
49:
50: #include <sys/types.h>
51:
52:
53: #define REVOPTS_REVERTBYTE 1
54: #define REVOPTS_REVERTCRC 2
55:
56:
57: struct tagCRCPoly {
58: u_char poly_bits;
59: u_int poly_num;
60: char poly_name[19];
61: }; // size 24bytes
62: typedef struct tagCRCPoly crcPoly_t;
63:
64:
65: // -------------------------------------------------------
66: // crc_GetErrno() Get error code of last operation
67: inline int crc_GetErrno();
68: // crc_GetError() Get error text of last operation
69: inline const char *crc_GetError();
70: // -------------------------------------------------------
71:
72:
73: /*
74: * crcReflect() Reflect all bits of number
75: * @crcNum = Number for reflection
76: * @crcBits = Number width bits
77: * return: -1 error, !=-1 reflecting number
78: */
79: inline u_int crcReflect(u_int crcNum, u_char crcBits);
80: /*
81: * crcCalc() Generic CRC calculation function for many sub variants of CRC algorithms
82: * @psBuf = Data for calculation
83: * @bufLen = Length of data
84: * @crcBits = CRC algorithm bits (1, 4, 5, 6, 7, 8, 10, 11, 12, 15, 16, 24, 30, 32)
85: * @RevOpts = Options for computation (REVOPTS_REVERTBYTE, REVOPTS_REVERTCRC)
86: * @initCRC = Initial CRC value
87: * @xorCRC = Last xor CRC value
88: * return: -1 error, !=-1 CRC checksum
89: */
90: inline u_int crcCalc(u_char * __restrict psBuf, u_int bufLen, u_char crcBits,
91: u_char RevOpts, u_int initCRC, u_int xorCRC);
92:
93: /*
94: * crcIP() Checksum in IP communication
95: * @nBuf = Data for calculation
96: * @bufLen = Length of data
97: * return: -1 error, !=-1 Checksum
98: */
99: inline u_short crcIP(u_short * __restrict nBuf, int bufLen);
100: /*
101: * crcFletcher16() Fletcher-16 Checksum computing
102: * @nBuf = Data for calculation
103: * @bufLen = Length of data
104: * return: -1 error, !=-1 Checksum
105: */
106: inline u_short crcFletcher16(u_short * __restrict nBuf, int bufLen);
107: /*
108: * crcFletcher() Fletcher-32 Checksum computing
109: * @nBuf = Data for calculation
110: * @bufLen = Length of data
111: * return: -1 error, !=-1 Checksum
112: */
113: inline u_int crcFletcher(u_short * __restrict nBuf, int bufLen);
114: /*
115: * crcAdler() crcAdler-32 Checksum computing
116: * @psBuf = Data for calculation
117: * @bufLen = Length of data
118: * return: -1 error, !=-1 Checksum
119: */
120: inline u_int crcAdler(u_char * __restrict psBuf, int bufLen);
121:
122: /*
123: * crcEther() Checksum in Ethernet communication
124: * @psBuf = Data for calculation
125: * @bufLen = Length of data
126: * return: -1 error, !=-1 Checksum
127: */
128: #define crcEther(psBuf, bufLen) crcCalc((psBuf), (bufLen), 32, 3, 0xFFFFFFFF, 0xFFFFFFFF)
129:
130:
131: /*
132: * crcPelco() Calculate Pelco D/P CRC
133: * @ver = Pelco protocol version (Dd | Pp)
134: * @pkt = Packet for calculate crc
135: * return: crc for packet, if is 0 check and crc_GetErrno() == 1
136: Pelco protocol not supported
137: */
138: inline u_char crcPelco(u_char ver, u_char *pkt);
139:
140:
141: /*
142: * hash_varchar() Compute index hash by variable length string
143: * @csStr = Input data buffer
144: * @nStrLen = Length of data buffer
145: * @nVer = Version of algorythm; 0 - original, 1 - AITNET variant
146: * return: Hash value
147: */
148: inline u_int hash_varchar(const char *csStr, int nStrLen, int nVer);
149: /*
150: * hash_bernstein() Compute index hash by Bernstein
151: * @csStr = Input data buffer
152: * @nStrLen = Length of data buffer
153: * @nVer = Version of algorythm; 0 - Bernstein, 1 - DJBX33A variant
154: * return: Hash value
155: */
156: inline u_int hash_bernstein(const char *csStr, int nStrLen, int nVer);
157: /*
158: * hash_jenkins() Compute index hash by Jenkins (one-at-a-time)
159: * @csStr = Input data buffer
160: * @nStrLen = Length of data buffer
161: * return: Hash value
162: */
163: inline u_int hash_jenkins(const char *csStr, int nStrLen);
164: /*
165: * hash_reddragon() Compute index hash by Red Dragon
166: * @csStr = Input data buffer
167: * @nStrLen = Length of data buffer
168: * return: Hash value
169: */
170: inline u_int hash_reddragon(const char *csStr, int nStrLen);
171: /*
172: * hash_fnv1() Compute index hash by FNV-1
173: * @csStr = Input data buffer
174: * @nStrLen = Length of data buffer
175: * @nVer = Version of algorythm; 0 - FNV-1, 1 - FNV-1a (best avalanche)
176: * return: Hash value
177: */
178: inline u_int hash_fnv1(const char *csStr, int nStrLen, int nVer);
179:
180: /*
181: * hash_fnv() Compute index hash by FNV-1a
182: * @csStr = Input data buffer
183: * @nStrLen = Length of data buffer
184: * return: Hash value
185: */
186: #define hash_fnv(str, len) hash_fnv1((str), (len), 1)
187:
188:
189: #endif
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