1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley
8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
9 * Support code is derived from software contributed to Berkeley
10 * by Atsushi Murai (amurai@spec.co.jp). Joliet support was added by
11 * Joachim Kuebart (joki@kuebart.stuttgart.netsurf.de).
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
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/mount.h>
41 #include <sys/vnode.h>
42 #include <sys/iconv.h>
43
44 #include <fs/cd9660/iso.h>
45 #include <fs/cd9660/cd9660_mount.h>
46
47 extern struct iconv_functions *cd9660_iconv;
48
49 /*
50 * Get one character out of an iso filename
51 * Obey joliet_level
52 * Return number of bytes consumed
53 */
54 int
isochar(u_char * isofn,u_char * isoend,int joliet_level,u_short * c,int * clen,int flags,void * handle)55 isochar(u_char *isofn, u_char *isoend, int joliet_level, u_short *c, int *clen,
56 int flags, void *handle)
57 {
58 size_t i, j, len;
59 char inbuf[3], outbuf[3], *inp, *outp;
60
61 *c = *isofn++;
62 if (clen) *clen = 1;
63 if (joliet_level == 0 || isofn == isoend)
64 /* (00) and (01) are one byte in Joliet, too */
65 return 1;
66
67 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
68 i = j = len = 2;
69 inbuf[0]=(char)*(isofn - 1);
70 inbuf[1]=(char)*isofn;
71 inbuf[2]='\0';
72 inp = inbuf;
73 outp = outbuf;
74 cd9660_iconv->convchr(handle, __DECONST(const char **, &inp), &i,
75 &outp, &j);
76 len -= j;
77 if (clen) *clen = len;
78 *c = '\0';
79 while(len--)
80 *c |= (*(outp - len - 1) & 0xff) << (len << 3);
81 } else {
82 switch (*c) {
83 default:
84 *c = '?';
85 break;
86 case '\0':
87 *c = *isofn;
88 break;
89 }
90 }
91
92 return 2;
93 }
94
95 /*
96 * translate and compare a filename
97 * returns (fn - isofn)
98 * Note: Version number plus ';' may be omitted.
99 */
100 int
isofncmp(u_char * fn,int fnlen,u_char * isofn,int isolen,int joliet_level,int flags,void * handle,void * lhandle)101 isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen, int joliet_level,
102 int flags, void *handle, void *lhandle)
103 {
104 int i, j;
105 u_short c, d;
106 u_char *fnend = fn + fnlen, *isoend = isofn + isolen;
107
108 for (; fn < fnend; ) {
109 d = sgetrune(fn, fnend - fn, __DECONST(const char **, &fn),
110 flags, lhandle);
111 if (isofn == isoend)
112 return d;
113 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
114 if (c == ';') {
115 if (d != ';')
116 return d;
117 for (i = 0; fn < fnend; i = i * 10 + *fn++ - '0') {
118 if (*fn < '0' || *fn > '9') {
119 return -1;
120 }
121 }
122 for (j = 0; isofn != isoend; j = j * 10 + c - '0')
123 isofn += isochar(isofn, isoend,
124 joliet_level, &c,
125 NULL, flags, handle);
126 return i - j;
127 }
128 if (c != d) {
129 if (c >= 'A' && c <= 'Z') {
130 if (c + ('a' - 'A') != d) {
131 if (d >= 'a' && d <= 'z')
132 return d - ('a' - 'A') - c;
133 else
134 return d - c;
135 }
136 } else
137 return d - c;
138 }
139 }
140 if (isofn != isoend) {
141 isofn += isochar(isofn, isoend, joliet_level, &c, NULL, flags, handle);
142 switch (c) {
143 default:
144 return -c;
145 case '.':
146 if (isofn != isoend) {
147 isochar(isofn, isoend, joliet_level, &c,
148 NULL, flags, handle);
149 if (c == ';')
150 return 0;
151 }
152 return -1;
153 case ';':
154 return 0;
155 }
156 }
157 return 0;
158 }
159
160 /*
161 * translate a filename of length > 0
162 */
163 void
isofntrans(u_char * infn,int infnlen,u_char * outfn,u_short * outfnlen,int original,int assoc,int joliet_level,int flags,void * handle)164 isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen,
165 int original, int assoc, int joliet_level, int flags, void *handle)
166 {
167 u_short c, d = '\0';
168 u_char *outp = outfn, *infnend = infn + infnlen;
169 int clen;
170
171 if (assoc) {
172 *outp++ = ASSOCCHAR;
173 }
174 for (; infn != infnend; ) {
175 infn += isochar(infn, infnend, joliet_level, &c, &clen, flags, handle);
176
177 if (!original && !joliet_level && c >= 'A' && c <= 'Z')
178 c += ('a' - 'A');
179 else if (!original && c == ';') {
180 outp -= (d == '.');
181 break;
182 }
183 d = c;
184 while(clen--)
185 *outp++ = c >> (clen << 3);
186 }
187 *outfnlen = outp - outfn;
188 }
189
190 /*
191 * same as sgetrune(3)
192 */
193 u_short
sgetrune(const char * string,size_t n,char const ** result,int flags,void * handle)194 sgetrune(const char *string, size_t n, char const **result, int flags,
195 void *handle)
196 {
197 size_t i, j, len;
198 char outbuf[3], *outp;
199 u_short c = '\0';
200
201 len = i = (n < 2) ? n : 2;
202 j = 2;
203 outp = outbuf;
204
205 if (flags & ISOFSMNT_KICONV && cd9660_iconv) {
206 cd9660_iconv->convchr(handle, (const char **)&string,
207 &i, &outp, &j);
208 len -= i;
209 } else {
210 len = 1;
211 string++;
212 }
213
214 if (result) *result = string;
215 while(len--) c |= (*(string - len - 1) & 0xff) << (len << 3);
216 return (c);
217 }
218