1/* $OpenBSD: iso.h,v 1.16 2021/03/05 07:01:36 jsg Exp $ */
2/* $NetBSD: iso.h,v 1.20 1997/07/07 22:45:34 cgd Exp $ */
3
4/*-
5 * Copyright (c) 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley
9 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
10 * Support code is derived from software contributed to Berkeley
11 * by Atsushi Murai (amurai@spec.co.jp).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)iso.h 8.4 (Berkeley) 12/5/94
38 */
39
40/*
41 * Definitions describing ISO9660 file system structure, as well as
42 * the functions necessary to access fields of ISO9660 file system
43 * structures.
44 */
45
46typedef uint32_t cdino_t;
47
48#define ISODCL(from, to) (to - from + 1)
49
50struct iso_volume_descriptor {
51 char type[ISODCL(1,1)]; /* 711 */
52 char id[ISODCL(2,6)];
53 char version[ISODCL(7,7)];
54 char data[ISODCL(8,2048)];
55};
56
57/* volume descriptor types */
58#define ISO_VD_PRIMARY 1
59#define ISO_VD_SUPPLEMENTARY 2
60#define ISO_VD_END 255
61
62#define ISO_STANDARD_ID "CD001"
63#define ISO_ECMA_ID "CDW01"
64
65struct iso_primary_descriptor {
66 char type [ISODCL ( 1, 1)]; /* 711 */
67 char id [ISODCL ( 2, 6)];
68 char version [ISODCL ( 7, 7)]; /* 711 */
69 char unused1 [ISODCL ( 8, 8)];
70 char system_id [ISODCL ( 9, 40)]; /* achars */
71 char volume_id [ISODCL ( 41, 72)]; /* dchars */
72 char unused2 [ISODCL ( 73, 80)];
73 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
74 char unused3 [ISODCL ( 89, 120)];
75 char volume_set_size [ISODCL (121, 124)]; /* 723 */
76 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
77 char logical_block_size [ISODCL (129, 132)]; /* 723 */
78 char path_table_size [ISODCL (133, 140)]; /* 733 */
79 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
80 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
81 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
82 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
83 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
84 char volume_set_id [ISODCL (191, 318)]; /* dchars */
85 char publisher_id [ISODCL (319, 446)]; /* achars */
86 char preparer_id [ISODCL (447, 574)]; /* achars */
87 char application_id [ISODCL (575, 702)]; /* achars */
88 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
89 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
90 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
91 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
92 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
93 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
94 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
95 char file_structure_version [ISODCL (882, 882)]; /* 711 */
96 char unused4 [ISODCL (883, 883)];
97 char application_data [ISODCL (884, 1395)];
98 char unused5 [ISODCL (1396, 2048)];
99};
100#define ISO_DEFAULT_BLOCK_SHIFT 11
101#define ISO_DEFAULT_BLOCK_SIZE (1<<ISO_DEFAULT_BLOCK_SHIFT)
102
103/*
104 * Used by Microsoft Joliet extension to ISO9660. Almost the same
105 * as PVD, but byte position 8 is a flag, and 89-120 is for escape.
106 */
107
108struct iso_supplementary_descriptor {
109 char type [ISODCL ( 1, 1)]; /* 711 */
110 char id [ISODCL ( 2, 6)];
111 char version [ISODCL ( 7, 7)]; /* 711 */
112 char flags [ISODCL ( 8, 8)];
113 char system_id [ISODCL ( 9, 40)]; /* achars */
114 char volume_id [ISODCL ( 41, 72)]; /* dchars */
115 char unused2 [ISODCL ( 73, 80)];
116 char volume_space_size [ISODCL ( 81, 88)]; /* 733 */
117 char escape [ISODCL ( 89, 120)];
118 char volume_set_size [ISODCL (121, 124)]; /* 723 */
119 char volume_sequence_number [ISODCL (125, 128)]; /* 723 */
120 char logical_block_size [ISODCL (129, 132)]; /* 723 */
121 char path_table_size [ISODCL (133, 140)]; /* 733 */
122 char type_l_path_table [ISODCL (141, 144)]; /* 731 */
123 char opt_type_l_path_table [ISODCL (145, 148)]; /* 731 */
124 char type_m_path_table [ISODCL (149, 152)]; /* 732 */
125 char opt_type_m_path_table [ISODCL (153, 156)]; /* 732 */
126 char root_directory_record [ISODCL (157, 190)]; /* 9.1 */
127 char volume_set_id [ISODCL (191, 318)]; /* dchars */
128 char publisher_id [ISODCL (319, 446)]; /* achars */
129 char preparer_id [ISODCL (447, 574)]; /* achars */
130 char application_id [ISODCL (575, 702)]; /* achars */
131 char copyright_file_id [ISODCL (703, 739)]; /* 7.5 dchars */
132 char abstract_file_id [ISODCL (740, 776)]; /* 7.5 dchars */
133 char bibliographic_file_id [ISODCL (777, 813)]; /* 7.5 dchars */
134 char creation_date [ISODCL (814, 830)]; /* 8.4.26.1 */
135 char modification_date [ISODCL (831, 847)]; /* 8.4.26.1 */
136 char expiration_date [ISODCL (848, 864)]; /* 8.4.26.1 */
137 char effective_date [ISODCL (865, 881)]; /* 8.4.26.1 */
138 char file_structure_version [ISODCL (882, 882)]; /* 711 */
139 char unused4 [ISODCL (883, 883)];
140 char application_data [ISODCL (884, 1395)];
141 char unused5 [ISODCL (1396, 2048)];
142};
143
144struct iso_directory_record {
145 char length [ISODCL (1, 1)]; /* 711 */
146 char ext_attr_length [ISODCL (2, 2)]; /* 711 */
147 u_char extent [ISODCL (3, 10)]; /* 733 */
148 u_char size [ISODCL (11, 18)]; /* 733 */
149 char date [ISODCL (19, 25)]; /* 7 by 711 */
150 char flags [ISODCL (26, 26)];
151 char file_unit_size [ISODCL (27, 27)]; /* 711 */
152 char interleave [ISODCL (28, 28)]; /* 711 */
153 char volume_sequence_number [ISODCL (29, 32)]; /* 723 */
154 char name_len [ISODCL (33, 33)]; /* 711 */
155 char name [1]; /* XXX */
156};
157/* can't take sizeof(iso_directory_record), because of possible alignment
158 of the last entry (34 instead of 33) */
159#define ISO_DIRECTORY_RECORD_SIZE 33
160
161struct iso_extended_attributes {
162 u_char owner [ISODCL (1, 4)]; /* 723 */
163 u_char group [ISODCL (5, 8)]; /* 723 */
164 u_char perm [ISODCL (9, 10)]; /* 9.5.3 */
165 char ctime [ISODCL (11, 27)]; /* 8.4.26.1 */
166 char mtime [ISODCL (28, 44)]; /* 8.4.26.1 */
167 char xtime [ISODCL (45, 61)]; /* 8.4.26.1 */
168 char ftime [ISODCL (62, 78)]; /* 8.4.26.1 */
169 char recfmt [ISODCL (79, 79)]; /* 711 */
170 char recattr [ISODCL (80, 80)]; /* 711 */
171 u_char reclen [ISODCL (81, 84)]; /* 723 */
172 char system_id [ISODCL (85, 116)]; /* achars */
173 char system_use [ISODCL (117, 180)];
174 char version [ISODCL (181, 181)]; /* 711 */
175 char len_esc [ISODCL (182, 182)]; /* 711 */
176 char reserved [ISODCL (183, 246)];
177 u_char len_au [ISODCL (247, 250)]; /* 723 */
178};
179
180static __inline int isonum_711(u_char *) __attribute__ ((__unused__));
181static __inline int isonum_712(char *) __attribute__ ((__unused__));
182static __inline int isonum_721(u_char *) __attribute__ ((__unused__));
183static __inline int isonum_722(u_char *) __attribute__ ((__unused__));
184static __inline int isonum_723(u_char *) __attribute__ ((__unused__));
185static __inline int isonum_731(u_char *) __attribute__ ((__unused__));
186static __inline int isonum_732(u_char *) __attribute__ ((__unused__));
187static __inline int isonum_733(u_char *) __attribute__ ((__unused__));
188
189/* 7.1.1: unsigned char */
190static __inline int
191isonum_711(u_char *p)
192{
193 return *p;
194}
195
196/* 7.1.2: signed(?) char */
197static __inline int
198isonum_712(char *p)
199{
200 return *p;
201}
202
203/* 7.2.1: unsigned little-endian 16-bit value. NOT USED IN KERNEL. */
204static __inline int
205isonum_721(u_char *p)
206{
207#if !defined(__STRICT_ALIGNMENT) && (BYTE_ORDER == LITTLE_ENDIAN)
208 return *(u_int16_t *)p;
209#else
210 return *p|((char)p[1] << 8);
211#endif
212}
213
214/* 7.2.2: unsigned big-endian 16-bit value. NOT USED IN KERNEL. */
215static __inline int
216isonum_722(unsigned char *p)
217{
218#if !defined(__STRICT_ALIGNMENT) && (BYTE_ORDER == BIG_ENDIAN)
219 return *(u_int16_t *)p;
220#else
221 return ((char)*p << 8)|p[1];
222#endif
223}
224
225/* 7.2.3: unsigned both-endian (little, then big) 16-bit value */
226static __inline int
227isonum_723(u_char *p)
228{
229#if !defined(__STRICT_ALIGNMENT) && \
230 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
231#if BYTE_ORDER == LITTLE_ENDIAN
232 return *(u_int16_t *)p;
233#else
234 return *(u_int16_t *)(p + 2);
235#endif
236#else /* __STRICT_ALIGNMENT or weird byte order */
237 return *p|(p[1] << 8);
238#endif
239}
240
241/* 7.3.1: unsigned little-endian 32-bit value. NOT USED IN KERNEL. */
242static __inline int
243isonum_731(u_char *p)
244{
245#if !defined(__STRICT_ALIGNMENT) && (BYTE_ORDER == LITTLE_ENDIAN)
246 return *(u_int32_t *)p;
247#else
248 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
249#endif
250}
251
252/* 7.3.2: unsigned big-endian 32-bit value. NOT USED IN KERNEL. */
253static __inline int
254isonum_732(unsigned char *p)
255{
256#if !defined(__STRICT_ALIGNMENT) && (BYTE_ORDER == BIG_ENDIAN)
257 return *(u_int32_t *)p;
258#else
259 return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
260#endif
261}
262
263/* 7.3.3: unsigned both-endian (little, then big) 32-bit value */
264static __inline int
265isonum_733(u_char *p)
266{
267#if !defined(__STRICT_ALIGNMENT) && \
268 ((BYTE_ORDER == LITTLE_ENDIAN) || (BYTE_ORDER == BIG_ENDIAN))
269#if BYTE_ORDER == LITTLE_ENDIAN
270 return *(u_int32_t *)p;
271#else
272 return *(u_int32_t *)(p + 4);
273#endif
274#else /* __STRICT_ALIGNMENT or weird byte order */
275 return *p|(p[1] << 8)|(p[2] << 16)|(p[3] << 24);
276#endif
277}
278
279/*
280 * Associated files have a leading '='.
281 */
282#define ASSOCCHAR '='