1 #ifndef lint
2 static char *rcsid = "$Id: mapselector.c,v 1.22 2003/01/20 13:39:58 m-kasahr Exp $";
3 #endif
4
5 /*
6 * Copyright (c) 2001,2002 Japan Network Information Center.
7 * All rights reserved.
8 *
9 * By using this file, you agree to the terms and conditions set forth bellow.
10 *
11 * LICENSE TERMS AND CONDITIONS
12 *
13 * The following License Terms and Conditions apply, unless a different
14 * license is obtained from Japan Network Information Center ("JPNIC"),
15 * a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
16 * Chiyoda-ku, Tokyo 101-0047, Japan.
17 *
18 * 1. Use, Modification and Redistribution (including distribution of any
19 * modified or derived work) in source and/or binary forms is permitted
20 * under this License Terms and Conditions.
21 *
22 * 2. Redistribution of source code must retain the copyright notices as they
23 * appear in each source code file, this License Terms and Conditions.
24 *
25 * 3. Redistribution in binary form must reproduce the Copyright Notice,
26 * this License Terms and Conditions, in the documentation and/or other
27 * materials provided with the distribution. For the purposes of binary
28 * distribution the "Copyright Notice" refers to the following language:
29 * "Copyright (c) 2000-2002 Japan Network Information Center. All rights reserved."
30 *
31 * 4. The name of JPNIC may not be used to endorse or promote products
32 * derived from this Software without specific prior written approval of
33 * JPNIC.
34 *
35 * 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
36 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
38 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE
39 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
40 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
41 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
43 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
44 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
45 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
46 */
47
48 #include <config.h>
49
50 #include <stddef.h>
51 #include <stdlib.h>
52 #include <string.h>
53
54 #include <idn/assert.h>
55 #include <idn/logmacro.h>
56 #include <idn/result.h>
57 #include <idn/mapselector.h>
58 #include <idn/strhash.h>
59 #include <idn/debug.h>
60 #include <idn/util.h>
61 #include <idn/ucs4.h>
62
63 struct idn_mapselector {
64 idn__strhash_t maphash;
65 int reference_count;
66 };
67
68 /*
69 * Maximum length of a top level domain name. (e.g. `com', `jp', ...)
70 */
71 #define MAPSELECTOR_MAX_TLD_LENGTH 63
72
73 static void string_ascii_tolower(char *string);
74
75
76 const unsigned long *
idn_mapselector_getnotld(void)77 idn_mapselector_getnotld(void) {
78 static const unsigned long notld[] = {0x002d, 0x0000}; /* "-" */
79 return (notld);
80 }
81
82 const unsigned long *
idn_mapselector_getdefaulttld(void)83 idn_mapselector_getdefaulttld(void) {
84 const static unsigned long defaulttld[] = {0x002e, 0x0000}; /* "." */
85 return (defaulttld);
86 }
87
88 idn_result_t
idn_mapselector_initialize(void)89 idn_mapselector_initialize(void) {
90 idn_result_t r;
91
92 TRACE(("idn_mapselector_initialize()\n"));
93
94 r = idn_mapper_initialize();
95
96 TRACE(("idn_mapselector_initialize(): %s\n", idn_result_tostring(r)));
97 return (r);
98 }
99
100 idn_result_t
idn_mapselector_create(idn_mapselector_t * ctxp)101 idn_mapselector_create(idn_mapselector_t *ctxp) {
102 idn_mapselector_t ctx = NULL;
103 idn_result_t r;
104
105 assert(ctxp != NULL);
106 TRACE(("idn_mapselector_create()\n"));
107
108 ctx = (idn_mapselector_t)malloc(sizeof(struct idn_mapselector));
109 if (ctx == NULL) {
110 r = idn_nomemory;
111 goto ret;
112 }
113
114 ctx->maphash = NULL;
115 ctx->reference_count = 1;
116
117 r = idn__strhash_create(&(ctx->maphash));
118 if (r != idn_success)
119 goto ret;
120
121 *ctxp = ctx;
122 r = idn_success;
123
124 ret:
125 if (r != idn_success) {
126 if (ctx != NULL)
127 free(ctx->maphash);
128 free(ctx);
129 }
130 TRACE(("idn_mapselector_create(): %s\n", idn_result_tostring(r)));
131 return (r);
132 }
133
134 void
idn_mapselector_destroy(idn_mapselector_t ctx)135 idn_mapselector_destroy(idn_mapselector_t ctx) {
136 assert(ctx != NULL);
137
138 TRACE(("idn_mapselector_destroy()\n"));
139
140 ctx->reference_count--;
141 if (ctx->reference_count <= 0) {
142 TRACE(("idn_mapselector_destroy(): "
143 "the object is destroyed\n"));
144 idn__strhash_destroy(ctx->maphash,
145 (idn__strhash_freeproc_t)&idn_mapper_destroy);
146 free(ctx);
147 } else {
148 TRACE(("idn_mapselector_destroy(): "
149 "update reference count (%d->%d)\n",
150 ctx->reference_count + 1, ctx->reference_count));
151 }
152 }
153
154 void
idn_mapselector_incrref(idn_mapselector_t ctx)155 idn_mapselector_incrref(idn_mapselector_t ctx) {
156 assert(ctx != NULL);
157
158 TRACE(("idn_mapselector_incrref()\n"));
159 TRACE(("idn_mapselector_incrref: update reference count (%d->%d)\n",
160 ctx->reference_count, ctx->reference_count + 1));
161
162 ctx->reference_count++;
163 }
164
165 idn_result_t
idn_mapselector_add(idn_mapselector_t ctx,const char * tld,const char * name)166 idn_mapselector_add(idn_mapselector_t ctx, const char *tld, const char *name) {
167 idn_result_t r;
168 idn_mapper_t mapper;
169 char hash_key[MAPSELECTOR_MAX_TLD_LENGTH + 1];
170
171 assert(ctx != NULL && tld != NULL);
172
173 TRACE(("idn_mapselector_add(tld=%s, name=%s)\n", tld, name));
174
175 if (!(tld[0] == '.' && tld[1] == '\0')) {
176 if (tld[0] == '.')
177 tld++;
178 if (strchr(tld, '.') != NULL) {
179 ERROR(("idn_mapselector_add: "
180 "invalid TLD \"%-.100s\"\n", tld));
181 r = idn_invalid_name;
182 goto ret;
183 }
184 }
185 if (strlen(tld) > MAPSELECTOR_MAX_TLD_LENGTH) {
186 ERROR(("idn_mapselector_add: "
187 "too long TLD \"%-.100s\"\n", tld));
188 r = idn_invalid_name;
189 goto ret;
190 }
191 strcpy(hash_key, tld);
192 string_ascii_tolower(hash_key);
193
194 if (idn__strhash_get(ctx->maphash, hash_key, (void **)&mapper)
195 != idn_success) {
196 r = idn_mapper_create(&mapper);
197 if (r != idn_success)
198 goto ret;
199
200 r = idn__strhash_put(ctx->maphash, hash_key, mapper);
201 if (r != idn_success)
202 goto ret;
203 }
204
205 r = idn_mapper_add(mapper, name);
206 ret:
207 TRACE(("idn_mapselector_add(): %s\n", idn_result_tostring(r)));
208 return (r);
209 }
210
211 idn_result_t
idn_mapselector_addall(idn_mapselector_t ctx,const char * tld,const char ** scheme_names,int nschemes)212 idn_mapselector_addall(idn_mapselector_t ctx, const char *tld,
213 const char **scheme_names, int nschemes) {
214 idn_result_t r;
215 int i;
216
217 assert(ctx != NULL && tld != NULL && scheme_names != NULL);
218
219 TRACE(("idn_mapselector_addall(tld=%s, nschemes=%d)\n",
220 tld, nschemes));
221
222 for (i = 0; i < nschemes; i++) {
223 r = idn_mapselector_add(ctx, tld, (const char *)*scheme_names);
224 if (r != idn_success)
225 goto ret;
226 scheme_names++;
227 }
228
229 r = idn_success;
230 ret:
231 TRACE(("idn_mapselector_addall(): %s\n", idn_result_tostring(r)));
232 return (r);
233 }
234
235 idn_mapper_t
idn_mapselector_mapper(idn_mapselector_t ctx,const char * tld)236 idn_mapselector_mapper(idn_mapselector_t ctx, const char *tld) {
237 idn_result_t r;
238 idn_mapper_t mapper;
239 char hash_key[MAPSELECTOR_MAX_TLD_LENGTH + 1];
240
241 assert(ctx != NULL && tld != NULL);
242
243 TRACE(("idn_mapselector_mapper(tld=%s)\n", tld));
244
245 if (!(tld[0] == '.' && tld[1] == '\0')) {
246 if (tld[0] == '.')
247 tld++;
248 if (strchr(tld, '.') != NULL)
249 return (NULL);
250 }
251 if (strlen(tld) > MAPSELECTOR_MAX_TLD_LENGTH)
252 return (NULL);
253 strcpy(hash_key, tld);
254 string_ascii_tolower(hash_key);
255
256 mapper = NULL;
257 r = idn__strhash_get(ctx->maphash, hash_key, (void **)&mapper);
258 if (r != idn_success)
259 return (NULL);
260
261 idn_mapper_incrref(mapper);
262
263 return (mapper);
264 }
265
266 idn_result_t
idn_mapselector_map(idn_mapselector_t ctx,const unsigned long * from,const char * tld,unsigned long * to,size_t tolen)267 idn_mapselector_map(idn_mapselector_t ctx, const unsigned long *from,
268 const char *tld, unsigned long *to, size_t tolen) {
269 idn_result_t r;
270 idn_mapper_t mapper = NULL;
271 char hash_key[MAPSELECTOR_MAX_TLD_LENGTH + 1];
272 size_t fromlen;
273
274 assert(ctx != NULL && from != NULL && to != NULL);
275
276 TRACE(("idn_mapselector_map(from=\"%s\", tld=\"%s\", tolen=%d)\n",
277 idn__debug_ucs4xstring(from, 50), idn__debug_xstring(tld, 50),
278 (int)tolen));
279
280 if (!(tld[0] == '.' && tld[1] == '\0')) {
281 if (tld[0] == '.')
282 tld++;
283 if (strchr(tld, '.') != NULL) {
284 r = idn_invalid_name;
285 goto ret;
286 }
287 }
288 if (strlen(tld) > MAPSELECTOR_MAX_TLD_LENGTH) {
289 r = idn_invalid_name;
290 goto ret;
291 }
292 strcpy(hash_key, tld);
293 string_ascii_tolower(hash_key);
294
295 fromlen = idn_ucs4_strlen(from);
296
297 /*
298 * Get mapper for the TLD.
299 */
300 if (idn__strhash_get(ctx->maphash, hash_key, (void **)&mapper)
301 != idn_success) {
302 strcpy(hash_key, IDN_MAPSELECTOR_DEFAULTTLD);
303 idn__strhash_get(ctx->maphash, hash_key, (void **)&mapper);
304 }
305
306 /*
307 * Map.
308 * If default mapper has not been registered, copy the string.
309 */
310 if (mapper == NULL) {
311 TRACE(("idn_mapselector_map(): no mapper\n"));
312 if (fromlen + 1 > tolen) {
313 r = idn_buffer_overflow;
314 goto ret;
315 }
316 memcpy(to, from, (fromlen + 1) * sizeof(*from));
317 } else {
318 TRACE(("idn_mapselector_map(): tld=%s\n", tld));
319 r = idn_mapper_map(mapper, from, to, tolen);
320 if (r != idn_success)
321 goto ret;
322 }
323
324 r = idn_success;
325 ret:
326 if (r == idn_success) {
327 TRACE(("idn_mapselector_map(): succcess (to=\"%s\")\n",
328 idn__debug_ucs4xstring(to, 50)));
329 } else {
330 TRACE(("idn_mapselector_map(): %s\n", idn_result_tostring(r)));
331 }
332 return (r);
333 }
334
335 idn_result_t
idn_mapselector_map2(idn_mapselector_t ctx,const unsigned long * from,const unsigned long * tld,unsigned long * to,size_t tolen)336 idn_mapselector_map2(idn_mapselector_t ctx, const unsigned long *from,
337 const unsigned long *tld, unsigned long *to,
338 size_t tolen) {
339 char tld_utf8[MAPSELECTOR_MAX_TLD_LENGTH + 1];
340 idn_result_t r;
341
342 assert(ctx != NULL && from != NULL && to != NULL);
343
344 TRACE(("idn_mapselector_map2(from=\"%s\", tld=\"%s\")\n",
345 idn__debug_ucs4xstring(from, 50),
346 idn__debug_ucs4xstring(tld, 50)));
347
348 r = idn_ucs4_ucs4toutf8(tld, tld_utf8, sizeof(tld_utf8));
349 if (r == idn_buffer_overflow) {
350 r = idn_invalid_name;
351 goto ret;
352 } else if (r != idn_success) {
353 goto ret;
354 }
355
356 r = idn_mapselector_map(ctx, from, tld_utf8, to, tolen);
357 ret:
358 if (r == idn_success) {
359 TRACE(("idn_mapselector_map2(): success (to=\"%s\")\n",
360 idn__debug_ucs4xstring(to, 50)));
361 } else {
362 TRACE(("idn_mapselector_map2(): %s\n", idn_result_tostring(r)));
363 }
364 return (r);
365 }
366
367 static void
string_ascii_tolower(char * string)368 string_ascii_tolower(char *string) {
369 unsigned char *p;
370
371 for (p = (unsigned char *) string; *p != '\0'; p++) {
372 if ('A' <= *p && *p <= 'Z')
373 *p = *p - 'A' + 'a';
374 }
375 }
376