bge: Avoid accessing invalid internal memory region on BCM5906
[dragonfly.git] / sys / libiconv / iconv.c
CommitLineData
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1/*
2 * Copyright (c) 2000-2001, Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
efd03c68 32 * $FreeBSD: src/sys/libkern/iconv.c,v 1.12.2.1.2.1 2009/04/15 03:14:26 kensmith Exp $
e7b4468c 33 * $DragonFly: src/sys/libiconv/iconv.c,v 1.8 2008/01/05 14:02:38 swildner Exp $
984263bc 34 */
efd03c68 35
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36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/kernel.h>
39#include <sys/iconv.h>
40#include <sys/malloc.h>
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41#include <sys/mount.h>
42#include <sys/syslog.h>
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43#include "iconv_converter_if.h"
44
45SYSCTL_DECL(_kern_iconv);
46
47SYSCTL_NODE(_kern, OID_AUTO, iconv, CTLFLAG_RW, NULL, "kernel iconv interface");
48
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49MALLOC_DEFINE(M_ICONV, "iconv", "ICONV structures");
50MALLOC_DEFINE(M_ICONVDATA, "iconv_data", "ICONV data");
984263bc 51
efd03c68 52MODULE_VERSION(libiconv, 2);
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53
54#ifdef notnow
55/*
56 * iconv converter instance
57 */
58struct iconv_converter {
59 KOBJ_FIELDS;
60 void * c_data;
61};
62#endif
63
64struct sysctl_oid *iconv_oid_hook = &sysctl___kern_iconv;
65
66/*
67 * List of loaded converters
68 */
69static TAILQ_HEAD(iconv_converter_list, iconv_converter_class)
70 iconv_converters = TAILQ_HEAD_INITIALIZER(iconv_converters);
71
72/*
73 * List of supported/loaded charsets pairs
74 */
75static TAILQ_HEAD(, iconv_cspair)
76 iconv_cslist = TAILQ_HEAD_INITIALIZER(iconv_cslist);
77static int iconv_csid = 1;
78
79static char iconv_unicode_string[] = "unicode"; /* save eight bytes when possible */
80
81static void iconv_unregister_cspair(struct iconv_cspair *csp);
82
83static int
84iconv_mod_unload(void)
85{
86 struct iconv_cspair *csp;
87
88 while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL) {
89 if (csp->cp_refcount)
90 return EBUSY;
984263bc 91 }
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92
93 while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL)
94 iconv_unregister_cspair(csp);
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95 return 0;
96}
97
98static int
99iconv_mod_handler(module_t mod, int type, void *data)
100{
101 int error;
102
103 switch (type) {
104 case MOD_LOAD:
105 error = 0;
106 break;
107 case MOD_UNLOAD:
108 error = iconv_mod_unload();
109 break;
110 default:
111 error = EINVAL;
112 }
113 return error;
114}
115
116static moduledata_t iconv_mod = {
117 "iconv", iconv_mod_handler, NULL
118};
119
120DECLARE_MODULE(iconv, iconv_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
121
122static int
123iconv_register_converter(struct iconv_converter_class *dcp)
124{
b4f5425e 125 kobj_class_instantiate((kobj_class_t)dcp);
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126 TAILQ_INSERT_TAIL(&iconv_converters, dcp, cc_link);
127 return 0;
128}
129
130static int
131iconv_unregister_converter(struct iconv_converter_class *dcp)
132{
b4f5425e 133 if (dcp->refs != 1) {
3f625015 134 ICDEBUG("converter has %d references left\n", dcp->refs);
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135 return EBUSY;
136 }
137 TAILQ_REMOVE(&iconv_converters, dcp, cc_link);
b4f5425e 138 kobj_class_uninstantiate((kobj_class_t)dcp);
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139 return 0;
140}
141
142static int
143iconv_lookupconv(const char *name, struct iconv_converter_class **dcpp)
144{
145 struct iconv_converter_class *dcp;
146
147 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
148 if (name == NULL)
149 continue;
150 if (strcmp(name, ICONV_CONVERTER_NAME(dcp)) == 0) {
151 if (dcpp)
152 *dcpp = dcp;
153 return 0;
154 }
155 }
156 return ENOENT;
157}
158
159static int
160iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
161{
162 struct iconv_cspair *csp;
163
164 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
165 if (strcmp(csp->cp_to, to) == 0 &&
166 strcmp(csp->cp_from, from) == 0) {
167 if (cspp)
168 *cspp = csp;
169 return 0;
170 }
171 }
172 return ENOENT;
173}
174
175static int
176iconv_register_cspair(const char *to, const char *from,
177 struct iconv_converter_class *dcp, void *data,
178 struct iconv_cspair **cspp)
179{
180 struct iconv_cspair *csp;
181 char *cp;
182 int csize, ucsto, ucsfrom;
183
184 if (iconv_lookupcs(to, from, NULL) == 0)
185 return EEXIST;
186 csize = sizeof(*csp);
187 ucsto = strcmp(to, iconv_unicode_string) == 0;
188 if (!ucsto)
189 csize += strlen(to) + 1;
190 ucsfrom = strcmp(from, iconv_unicode_string) == 0;
191 if (!ucsfrom)
192 csize += strlen(from) + 1;
e7b4468c 193 csp = kmalloc(csize, M_ICONV, M_WAITOK | M_ZERO);
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194 csp->cp_id = iconv_csid++;
195 csp->cp_dcp = dcp;
196 cp = (char*)(csp + 1);
197 if (!ucsto) {
198 strcpy(cp, to);
199 csp->cp_to = cp;
200 cp += strlen(cp) + 1;
201 } else
202 csp->cp_to = iconv_unicode_string;
203 if (!ucsfrom) {
204 strcpy(cp, from);
205 csp->cp_from = cp;
206 } else
207 csp->cp_from = iconv_unicode_string;
208 csp->cp_data = data;
209
210 TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
211 *cspp = csp;
212 return 0;
213}
214
215static void
216iconv_unregister_cspair(struct iconv_cspair *csp)
217{
218 TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
219 if (csp->cp_data)
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220 kfree(csp->cp_data, M_ICONVDATA);
221 kfree(csp, M_ICONV);
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222}
223
224/*
225 * Lookup and create an instance of converter.
226 * Currently this layer didn't have associated 'instance' structure
227 * to avoid unnesessary memory allocation.
228 */
229int
230iconv_open(const char *to, const char *from, void **handle)
231{
232 struct iconv_cspair *csp, *cspfrom, *cspto;
233 struct iconv_converter_class *dcp;
234 const char *cnvname;
235 int error;
236
237 /*
238 * First, lookup fully qualified cspairs
239 */
240 error = iconv_lookupcs(to, from, &csp);
241 if (error == 0)
242 return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
243
244 /*
245 * Well, nothing found. Now try to construct a composite conversion
246 * ToDo: add a 'capability' field to converter
247 */
248 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
249 cnvname = ICONV_CONVERTER_NAME(dcp);
250 if (cnvname == NULL)
251 continue;
252 error = iconv_lookupcs(cnvname, from, &cspfrom);
253 if (error)
254 continue;
255 error = iconv_lookupcs(to, cnvname, &cspto);
256 if (error)
257 continue;
258 /*
259 * Fine, we're found a pair which can be combined together
260 */
261 return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
262 }
263 return ENOENT;
264}
265
266int
267iconv_close(void *handle)
268{
269 return ICONV_CONVERTER_CLOSE(handle);
270}
271
272int
273iconv_conv(void *handle, const char **inbuf,
274 size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
275{
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276 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 0, 0);
277}
278
279int
280iconv_conv_case(void *handle, const char **inbuf,
281 size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype)
282{
283 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 0, casetype);
284}
285
286int
287iconv_convchr(void *handle, const char **inbuf,
288 size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
289{
290 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 1, 0);
291}
292
293int
294iconv_convchr_case(void *handle, const char **inbuf,
295 size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype)
296{
297 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 1, casetype);
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298}
299
300/*
301 * Give a list of loaded converters. Each name terminated with 0.
302 * An empty string terminates the list.
303 */
304static int
305iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
306{
307 struct iconv_converter_class *dcp;
308 const char *name;
309 char spc;
310 int error;
311
312 error = 0;
313
314 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
315 name = ICONV_CONVERTER_NAME(dcp);
316 if (name == NULL)
317 continue;
318 error = SYSCTL_OUT(req, name, strlen(name) + 1);
319 if (error)
320 break;
321 }
322 if (error)
323 return error;
324 spc = 0;
325 error = SYSCTL_OUT(req, &spc, sizeof(spc));
326 return error;
327}
328
329SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist, CTLFLAG_RD | CTLTYPE_OPAQUE,
330 NULL, 0, iconv_sysctl_drvlist, "S,xlat", "registered converters");
331
332/*
333 * List all available charset pairs.
334 */
335static int
336iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
337{
338 struct iconv_cspair *csp;
339 struct iconv_cspair_info csi;
340 int error;
341
342 error = 0;
343 bzero(&csi, sizeof(csi));
344 csi.cs_version = ICONV_CSPAIR_INFO_VER;
345
346 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
347 csi.cs_id = csp->cp_id;
348 csi.cs_refcount = csp->cp_refcount;
349 csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
350 strcpy(csi.cs_to, csp->cp_to);
351 strcpy(csi.cs_from, csp->cp_from);
352 error = SYSCTL_OUT(req, &csi, sizeof(csi));
353 if (error)
354 break;
355 }
356 return error;
357}
358
359SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist, CTLFLAG_RD | CTLTYPE_OPAQUE,
360 NULL, 0, iconv_sysctl_cslist, "S,xlat", "registered charset pairs");
361
362/*
363 * Add new charset pair
364 */
365static int
366iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
367{
368 struct iconv_converter_class *dcp;
369 struct iconv_cspair *csp;
370 struct iconv_add_in din;
371 struct iconv_add_out dout;
372 int error;
373
374 error = SYSCTL_IN(req, &din, sizeof(din));
375 if (error)
376 return error;
377 if (din.ia_version != ICONV_ADD_VER)
378 return EINVAL;
379 if (din.ia_datalen > ICONV_CSMAXDATALEN)
380 return EINVAL;
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381
382 /*
383 * Make sure all user-supplied strings are terminated before
384 * proceeding.
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385 *
386 * XXX return EINVAL if strings are not properly terminated
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387 */
388 din.ia_converter[ICONV_CNVNMAXLEN-1] = 0;
389 din.ia_to[ICONV_CSNMAXLEN-1] = 0;
390 din.ia_from[ICONV_CSNMAXLEN-1] = 0;
391
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392 if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
393 return EINVAL;
394 error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
395 if (error)
396 return error;
397 if (din.ia_datalen) {
efda3bd0 398 csp->cp_data = kmalloc(din.ia_datalen, M_ICONVDATA, M_WAITOK);
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399 error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
400 if (error)
401 goto bad;
402 }
403 dout.ia_csid = csp->cp_id;
404 error = SYSCTL_OUT(req, &dout, sizeof(dout));
405 if (error)
406 goto bad;
efd03c68 407 ICDEBUG("%s => %s, %d bytes\n",din.ia_from, din.ia_to, din.ia_datalen);
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408 return 0;
409bad:
410 iconv_unregister_cspair(csp);
411 return error;
412}
413
414SYSCTL_PROC(_kern_iconv, OID_AUTO, add, CTLFLAG_RW | CTLTYPE_OPAQUE,
415 NULL, 0, iconv_sysctl_add, "S,xlat", "register charset pair");
416
417/*
418 * Default stubs for converters
419 */
420int
421iconv_converter_initstub(struct iconv_converter_class *dp)
422{
423 return 0;
424}
425
426int
427iconv_converter_donestub(struct iconv_converter_class *dp)
428{
429 return 0;
430}
431
432int
433iconv_converter_handler(module_t mod, int type, void *data)
434{
435 struct iconv_converter_class *dcp = data;
436 int error;
437
438 switch (type) {
439 case MOD_LOAD:
440 error = iconv_register_converter(dcp);
441 if (error)
442 break;
443 error = ICONV_CONVERTER_INIT(dcp);
444 if (error)
445 iconv_unregister_converter(dcp);
446 break;
447 case MOD_UNLOAD:
448 ICONV_CONVERTER_DONE(dcp);
449 error = iconv_unregister_converter(dcp);
450 break;
451 default:
452 error = EINVAL;
453 }
454 return error;
455}
456
457/*
efd03c68 458 * Common used functions (don't use with unicode)
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459 */
460char *
461iconv_convstr(void *handle, char *dst, const char *src)
462{
463 char *p = dst;
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464 int error;
465 size_t inlen, outlen;
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466
467 if (handle == NULL) {
468 strcpy(dst, src);
469 return dst;
470 }
471 inlen = outlen = strlen(src);
472 error = iconv_conv(handle, NULL, NULL, &p, &outlen);
473 if (error)
474 return NULL;
475 error = iconv_conv(handle, &src, &inlen, &p, &outlen);
476 if (error)
477 return NULL;
478 *p = 0;
479 return dst;
480}
481
482void *
483iconv_convmem(void *handle, void *dst, const void *src, int size)
484{
485 const char *s = src;
486 char *d = dst;
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487 size_t inlen, outlen;
488 int error;
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489
490 if (size == 0)
491 return dst;
492 if (handle == NULL) {
493 memcpy(dst, src, size);
494 return dst;
495 }
496 inlen = outlen = size;
497 error = iconv_conv(handle, NULL, NULL, &d, &outlen);
498 if (error)
499 return NULL;
500 error = iconv_conv(handle, &s, &inlen, &d, &outlen);
501 if (error)
502 return NULL;
503 return dst;
504}
505
506int
507iconv_lookupcp(char **cpp, const char *s)
508{
509 if (cpp == NULL) {
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510 ICDEBUG("warning a NULL list passed\n", ""); /* XXX ISO variadic macros cannot
511 leave out the
512 variadic args */
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513 return ENOENT;
514 }
515 for (; *cpp; cpp++)
516 if (strcmp(*cpp, s) == 0)
517 return 0;
518 return ENOENT;
519}
efd03c68 520
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521/*
522 * Return if fsname is in use of not
523 */
524int
525iconv_vfs_refcount(const char *fsname)
526{
527 struct vfsconf *vfsp;
528
8c8293fe 529 vfsp = vfsconf_find_by_name(fsname);
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530 if (vfsp != NULL && vfsp->vfc_refcount > 0)
531 return (EBUSY);
532 return (0);
533}