summaryrefslogtreecommitdiffstats
path: root/sys/i4b/layer1/i4b_hdlc.c
blob: 1c968b18ca82f7aef08fedd003ad9166ade76b25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
 * Copyright (c) 2000 Hans Petter Selasky. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *---------------------------------------------------------------------------
 *
 *	i4b_hdlc.c - software-HDLC constant tables
 *	------------------------------------------
 *	$Id: i4b_hdlc.h,v 1.5 2000/08/28 07:41:19 hm Exp $
 *	last edit-date: [Wed Jul 19 09:41:13 2000]
 *
 *---------------------------------------------------------------------------*/

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/types.h>

/*---------------------------------------------------------------------------*
 *	HDLC CRC table
 *
 * Usage:
 *	crc = (HDLC_FCS_TAB[(u_char)(crc ^ byte of data)] ^ (u_char)(crc >> 8));
 *
 *	For more information see RFC 1662 (p. 10)
 *---------------------------------------------------------------------------*/
const uint16_t HDLC_FCS_TAB[256] = { 0x0000, 
        0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 
        0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 0x1081, 
        0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 0x9cc9, 
        0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 0x2102, 
        0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 0xad4a, 
        0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183, 
        0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 0xbdcb, 
        0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 
        0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 0xce4c, 
        0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 
        0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 0xdecd, 
        0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 0x6306, 
        0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 0xef4e, 
        0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 0x7387, 
        0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf, 
        0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 0x8408, 
        0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 
        0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 
        0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 
        0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 
        0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 0x2942, 
        0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 0xb58b, 
        0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 0x39c3, 
        0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c, 
        0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 
        0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 
        0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 
        0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 0xe70e, 
        0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 0x6b46, 
        0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 0xf78f, 
        0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 0x7bc7, 
        0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 
};

/*---------------------------------------------------------------------------*
 *	HDLC bit table
 *	==============	
 *
 *	bits[0..3]:	A value which tells how many set bits there are at the
 *		   	beginning of the byte.
 *
 *	bits[4..7]:	Special bytes like 0x7e, 0x7d, 0xfd ... are flagged here
 *			NOTE: Special bytes also means 'abort' bytes (7 or more
 *			      continuous set bits)
 *
 *	bits[8..11]:	A copy of bits[0..3] but only incremented by one.
 *		     	NOTE: 0x7e has value '8' instead of '0'. Internal reasons.
 *
 *	bits[12..15]: 	A value which tells how many set bits there are at the
 *		      	end of the byte.
 *			NOTE: 0xff has both '8' incoming and '8' outgoing bits.
 *
 *---------------------------------------------------------------------------*/
const uint16_t HDLC_BIT_TAB[256] = { 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0504, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0605, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0504, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0160, 0x0706, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0504, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0605, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0504, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x0100, 0x0201, 0x0100, 0x0403, 0x0100, 
        0x0201, 0x0100, 0x0302, 0x01a0, 0x02a1, 0x0860, 0x0807, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1403, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1504, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1403, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1605, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1403, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1504, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1100, 0x1403, 0x1100, 
        0x1201, 0x1100, 0x1302, 0x1100, 0x1201, 0x1160, 0x1706, 0x2100, 
        0x2201, 0x2100, 0x2302, 0x2100, 0x2201, 0x2100, 0x2403, 0x2100, 
        0x2201, 0x2100, 0x2302, 0x2100, 0x2201, 0x2100, 0x2504, 0x2100, 
        0x2201, 0x2100, 0x2302, 0x2100, 0x2201, 0x2100, 0x2403, 0x2100, 
        0x2201, 0x2100, 0x2302, 0x2100, 0x2201, 0x2100, 0x2605, 0x3100, 
        0x3201, 0x3100, 0x3302, 0x3100, 0x3201, 0x3100, 0x3403, 0x3100, 
        0x3201, 0x3100, 0x3302, 0x3100, 0x3201, 0x3100, 0x3504, 0x4100, 
        0x4201, 0x4100, 0x4302, 0x4100, 0x4201, 0x4100, 0x4403, 0x5100, 
        0x5201, 0x5100, 0x5302, 0x6180, 0x6281, 0x7150, 0x8908 
};
OpenPOWER on IntegriCloud