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Diffstat (limited to 'src/gns/gns_tld_api.c')
-rw-r--r-- | src/gns/gns_tld_api.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/src/gns/gns_tld_api.c b/src/gns/gns_tld_api.c deleted file mode 100644 index c88ce776e..000000000 --- a/src/gns/gns_tld_api.c +++ /dev/null | |||
@@ -1,353 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2013, 2016, 2018 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | /** | ||
21 | * @file gns/gns_tld_api.c | ||
22 | * @brief library to access the GNS service, including TLD lookup | ||
23 | * @author Martin Schanzenbach | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_constants.h" | ||
29 | #include "gnunet_arm_service.h" | ||
30 | #include "gnunet_identity_service.h" | ||
31 | #include "gnunet_hello_lib.h" | ||
32 | #include "gnunet_protocols.h" | ||
33 | #include "gnunet_dht_service.h" | ||
34 | #include "gns.h" | ||
35 | #include "gns_api.h" | ||
36 | |||
37 | |||
38 | #define LOG(kind, ...) GNUNET_log_from (kind, "gns-tld-api", __VA_ARGS__) | ||
39 | |||
40 | |||
41 | /** | ||
42 | * Handle to a lookup request | ||
43 | */ | ||
44 | struct GNUNET_GNS_LookupWithTldRequest | ||
45 | { | ||
46 | /** | ||
47 | * handle to gns | ||
48 | */ | ||
49 | struct GNUNET_GNS_Handle *gns_handle; | ||
50 | |||
51 | /** | ||
52 | * processor to call on lookup result | ||
53 | */ | ||
54 | GNUNET_GNS_LookupResultProcessor2 lookup_proc; | ||
55 | |||
56 | /** | ||
57 | * Domain name we are resolving. | ||
58 | */ | ||
59 | char *name; | ||
60 | |||
61 | /** | ||
62 | * @e lookup_proc closure | ||
63 | */ | ||
64 | void *lookup_proc_cls; | ||
65 | |||
66 | /** | ||
67 | * Underlying GNS lookup. | ||
68 | */ | ||
69 | struct GNUNET_GNS_LookupRequest *lr; | ||
70 | |||
71 | /** | ||
72 | * Lookup an ego with the identity service. | ||
73 | */ | ||
74 | struct GNUNET_IDENTITY_EgoSuffixLookup *id_co; | ||
75 | |||
76 | /** | ||
77 | * Name of the longest matching ego found so far. | ||
78 | * Must be freed on termination. | ||
79 | */ | ||
80 | char *longest_match; | ||
81 | |||
82 | /** | ||
83 | * Ego corresponding to @e longest_match. | ||
84 | */ | ||
85 | struct GNUNET_IDENTITY_Ego *longest_match_ego; | ||
86 | |||
87 | /** | ||
88 | * Desired result record type. | ||
89 | */ | ||
90 | uint32_t type; | ||
91 | |||
92 | /** | ||
93 | * Lookup options. | ||
94 | */ | ||
95 | enum GNUNET_GNS_LocalOptions options; | ||
96 | }; | ||
97 | |||
98 | |||
99 | /** | ||
100 | * Obtain the TLD of the given @a name. | ||
101 | * | ||
102 | * @param name a name | ||
103 | * @return the part of @a name after the last ".", | ||
104 | * or @a name if @a name does not contain a "." | ||
105 | */ | ||
106 | static const char * | ||
107 | get_tld (const char *name) | ||
108 | { | ||
109 | const char *tld; | ||
110 | |||
111 | tld = strrchr (name, (unsigned char) '.'); | ||
112 | if (NULL == tld) | ||
113 | tld = name; | ||
114 | else | ||
115 | tld++; /* skip the '.' */ | ||
116 | return tld; | ||
117 | } | ||
118 | |||
119 | |||
120 | /** | ||
121 | * Eat the "TLD" (last bit) of the given @a name. | ||
122 | * | ||
123 | * @param[in,out] name a name | ||
124 | * @param tld what to eat (can be more than just the tld) | ||
125 | */ | ||
126 | static void | ||
127 | eat_tld (char *name, const char *tld) | ||
128 | { | ||
129 | GNUNET_assert (0 < strlen (name)); | ||
130 | if ((NULL == tld) || (strlen (name) == strlen (tld))) | ||
131 | { | ||
132 | strcpy (name, GNUNET_GNS_EMPTY_LABEL_AT); | ||
133 | } | ||
134 | else | ||
135 | { | ||
136 | GNUNET_assert (strlen (tld) < strlen (name)); | ||
137 | name[strlen (name) - strlen (tld) - 1] = '\0'; | ||
138 | } | ||
139 | } | ||
140 | |||
141 | |||
142 | /** | ||
143 | * Function called with the result of a GNS lookup. | ||
144 | * | ||
145 | * @param cls a `struct GNUNET_GNS_LookupWithTldRequest *` | ||
146 | * @param rd_count number of records returned | ||
147 | * @param rd array of @a rd_count records with the results | ||
148 | */ | ||
149 | static void | ||
150 | process_lookup_result (void *cls, | ||
151 | uint32_t rd_count, | ||
152 | const struct GNUNET_GNSRECORD_Data *rd) | ||
153 | { | ||
154 | struct GNUNET_GNS_LookupWithTldRequest *ltr = cls; | ||
155 | |||
156 | ltr->lr = NULL; | ||
157 | ltr->lookup_proc (ltr->lookup_proc_cls, GNUNET_YES, rd_count, rd); | ||
158 | GNUNET_GNS_lookup_with_tld_cancel (ltr); | ||
159 | } | ||
160 | |||
161 | |||
162 | /** | ||
163 | * Perform the actual resolution, starting with the zone | ||
164 | * identified by the given public key. | ||
165 | * | ||
166 | * @param pkey public key to use for the zone, can be NULL | ||
167 | */ | ||
168 | static void | ||
169 | lookup_with_public_key (struct GNUNET_GNS_LookupWithTldRequest *ltr, | ||
170 | const struct GNUNET_IDENTITY_PublicKey *pkey) | ||
171 | { | ||
172 | ltr->lr = GNUNET_GNS_lookup (ltr->gns_handle, | ||
173 | ltr->name, | ||
174 | pkey, | ||
175 | ltr->type, | ||
176 | ltr->options, | ||
177 | &process_lookup_result, | ||
178 | ltr); | ||
179 | } | ||
180 | |||
181 | |||
182 | /** | ||
183 | * Method called to with the ego we are to use for the lookup, | ||
184 | * when the ego is determined by a name. | ||
185 | * | ||
186 | * @param cls a `struct GNUNET_GNS_LookupWithTldRequest *` | ||
187 | * @param ego ego handle, NULL at the end of the iteration | ||
188 | * @param ctx context we could store data to associate with @e ego | ||
189 | * @param ego_name name of the ego | ||
190 | */ | ||
191 | static void | ||
192 | identity_zone_cb (void *cls, | ||
193 | const struct GNUNET_IDENTITY_PrivateKey *priv, | ||
194 | const char *ego_name) | ||
195 | { | ||
196 | struct GNUNET_GNS_LookupWithTldRequest *ltr = cls; | ||
197 | struct GNUNET_IDENTITY_PublicKey pkey; | ||
198 | |||
199 | ltr->id_co = NULL; | ||
200 | if (NULL == priv) | ||
201 | { | ||
202 | /* no matching ego found */ | ||
203 | ltr->lookup_proc (ltr->lookup_proc_cls, GNUNET_NO, 0, NULL); | ||
204 | return; | ||
205 | } | ||
206 | /* Final case: TLD matches one of our egos */ | ||
207 | if (0 == strcmp (ltr->name, ego_name)) | ||
208 | { | ||
209 | /* name matches ego name perfectly, only "@" remains */ | ||
210 | strcpy (ltr->name, GNUNET_GNS_EMPTY_LABEL_AT); | ||
211 | } | ||
212 | else | ||
213 | { | ||
214 | GNUNET_assert (strlen (ego_name) < strlen (ltr->name)); | ||
215 | ltr->name[strlen (ltr->name) - strlen (ego_name) - 1] = '\0'; | ||
216 | } | ||
217 | /* if the name is of the form 'label' (and not 'label.SUBDOMAIN'), never go to the DHT */ | ||
218 | if (NULL == strchr (ltr->name, (unsigned char) '.')) | ||
219 | ltr->options = GNUNET_GNS_LO_NO_DHT; | ||
220 | else | ||
221 | ltr->options = GNUNET_GNS_LO_LOCAL_MASTER; | ||
222 | GNUNET_IDENTITY_key_get_public (priv, &pkey); | ||
223 | lookup_with_public_key (ltr, &pkey); | ||
224 | } | ||
225 | |||
226 | |||
227 | /** | ||
228 | * Perform an asynchronous lookup operation on the GNS, | ||
229 | * determining the zone using the TLD of the given name | ||
230 | * and the current configuration to resolve TLDs to zones. | ||
231 | * | ||
232 | * @param handle handle to the GNS service | ||
233 | * @param name the name to look up, including TLD (in UTF-8 encoding) | ||
234 | * @param type the record type to look up | ||
235 | * @param options local options for the lookup | ||
236 | * @param proc processor to call on result | ||
237 | * @param proc_cls closure for @a proc | ||
238 | * @return handle to the get request, NULL on error (e.g. bad configuration) | ||
239 | */ | ||
240 | struct GNUNET_GNS_LookupWithTldRequest * | ||
241 | GNUNET_GNS_lookup_with_tld (struct GNUNET_GNS_Handle *handle, | ||
242 | const char *name, | ||
243 | uint32_t type, | ||
244 | enum GNUNET_GNS_LocalOptions options, | ||
245 | GNUNET_GNS_LookupResultProcessor2 proc, | ||
246 | void *proc_cls) | ||
247 | { | ||
248 | struct GNUNET_GNS_LookupWithTldRequest *ltr; | ||
249 | const char *tld; | ||
250 | char *dot_tld; | ||
251 | char *zonestr; | ||
252 | struct GNUNET_IDENTITY_PublicKey pkey; | ||
253 | |||
254 | ltr = GNUNET_new (struct GNUNET_GNS_LookupWithTldRequest); | ||
255 | ltr->gns_handle = handle; | ||
256 | ltr->name = GNUNET_strdup (name); | ||
257 | ltr->type = type; | ||
258 | ltr->options = options; | ||
259 | ltr->lookup_proc = proc; | ||
260 | ltr->lookup_proc_cls = proc_cls; | ||
261 | /* start with trivial case: TLD is zkey */ | ||
262 | tld = get_tld (ltr->name); | ||
263 | if (GNUNET_OK == | ||
264 | GNUNET_IDENTITY_public_key_from_string (tld, &pkey)) | ||
265 | { | ||
266 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
267 | "`%s' seems to be a valid zone key\n", tld); | ||
268 | eat_tld (ltr->name, tld); | ||
269 | lookup_with_public_key (ltr, &pkey); | ||
270 | return ltr; | ||
271 | } | ||
272 | |||
273 | /* second case: domain is mapped in our configuration file */ | ||
274 | for (const char *domain = name; NULL != domain; | ||
275 | domain = strchr (domain, (unsigned char) '.')) | ||
276 | { | ||
277 | if ('.' == domain[0]) | ||
278 | domain++; | ||
279 | GNUNET_asprintf (&dot_tld, ".%s", domain); | ||
280 | if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (handle->cfg, | ||
281 | "gns", | ||
282 | dot_tld, | ||
283 | &zonestr)) | ||
284 | { | ||
285 | if (GNUNET_OK != | ||
286 | GNUNET_IDENTITY_public_key_from_string (zonestr, | ||
287 | &pkey)) | ||
288 | { | ||
289 | GNUNET_log_config_invalid ( | ||
290 | GNUNET_ERROR_TYPE_ERROR, | ||
291 | "gns", | ||
292 | dot_tld, | ||
293 | _ ("Expected a base32-encoded public zone key\n")); | ||
294 | GNUNET_free (zonestr); | ||
295 | GNUNET_free (dot_tld); | ||
296 | GNUNET_free (ltr->name); | ||
297 | GNUNET_free (ltr); | ||
298 | return NULL; | ||
299 | } | ||
300 | eat_tld (ltr->name, &dot_tld[1]); | ||
301 | GNUNET_free (zonestr); | ||
302 | GNUNET_free (dot_tld); | ||
303 | lookup_with_public_key (ltr, &pkey); | ||
304 | return ltr; | ||
305 | } | ||
306 | GNUNET_free (dot_tld); | ||
307 | } | ||
308 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
309 | "`%s' should be a valid ego\n", ltr->name); | ||
310 | ltr->id_co = | ||
311 | GNUNET_IDENTITY_ego_lookup_by_suffix (ltr->gns_handle->cfg, | ||
312 | ltr->name, | ||
313 | &identity_zone_cb, | ||
314 | ltr); | ||
315 | if (NULL == ltr->id_co) | ||
316 | { | ||
317 | GNUNET_free (ltr->name); | ||
318 | GNUNET_free (ltr); | ||
319 | return NULL; | ||
320 | } | ||
321 | return ltr; | ||
322 | } | ||
323 | |||
324 | |||
325 | /** | ||
326 | * Cancel pending lookup request | ||
327 | * | ||
328 | * @param ltr the lookup request to cancel | ||
329 | * @return closure from the lookup result processor | ||
330 | */ | ||
331 | void * | ||
332 | GNUNET_GNS_lookup_with_tld_cancel (struct GNUNET_GNS_LookupWithTldRequest *ltr) | ||
333 | { | ||
334 | void *ret = ltr->lookup_proc_cls; | ||
335 | |||
336 | if (NULL != ltr->id_co) | ||
337 | { | ||
338 | GNUNET_IDENTITY_ego_lookup_by_suffix_cancel (ltr->id_co); | ||
339 | ltr->id_co = NULL; | ||
340 | } | ||
341 | if (NULL != ltr->lr) | ||
342 | { | ||
343 | GNUNET_GNS_lookup_cancel (ltr->lr); | ||
344 | ltr->lr = NULL; | ||
345 | } | ||
346 | GNUNET_free (ltr->longest_match); | ||
347 | GNUNET_free (ltr->name); | ||
348 | GNUNET_free (ltr); | ||
349 | return ret; | ||
350 | } | ||
351 | |||
352 | |||
353 | /* end of gns_tld_api.c */ | ||