diff options
Diffstat (limited to 'src/service/messenger/gnunet-service-messenger_member.c')
-rw-r--r-- | src/service/messenger/gnunet-service-messenger_member.c | 462 |
1 files changed, 462 insertions, 0 deletions
diff --git a/src/service/messenger/gnunet-service-messenger_member.c b/src/service/messenger/gnunet-service-messenger_member.c new file mode 100644 index 000000000..0940c42ce --- /dev/null +++ b/src/service/messenger/gnunet-service-messenger_member.c | |||
@@ -0,0 +1,462 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2020--2024 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 | * @author Tobias Frisch | ||
22 | * @file src/messenger/gnunet-service-messenger_member.c | ||
23 | * @brief GNUnet MESSENGER service | ||
24 | */ | ||
25 | |||
26 | #include "platform.h" | ||
27 | #include "gnunet-service-messenger_member.h" | ||
28 | |||
29 | #include "gnunet-service-messenger_member_session.h" | ||
30 | |||
31 | #include "messenger_api_util.h" | ||
32 | |||
33 | struct GNUNET_MESSENGER_Member* | ||
34 | create_member (struct GNUNET_MESSENGER_MemberStore *store, | ||
35 | const struct GNUNET_ShortHashCode *id) | ||
36 | { | ||
37 | GNUNET_assert (store); | ||
38 | |||
39 | struct GNUNET_MESSENGER_Member *member = GNUNET_new (struct | ||
40 | GNUNET_MESSENGER_Member); | ||
41 | |||
42 | member->store = store; | ||
43 | |||
44 | if (id) | ||
45 | GNUNET_memcpy (&(member->id), id, sizeof(member->id)); | ||
46 | else if (GNUNET_YES != generate_free_member_id (&(member->id), | ||
47 | store->members)) | ||
48 | { | ||
49 | GNUNET_free (member); | ||
50 | return NULL; | ||
51 | } | ||
52 | |||
53 | member->sessions = GNUNET_CONTAINER_multihashmap_create (2, GNUNET_NO); | ||
54 | |||
55 | return member; | ||
56 | } | ||
57 | |||
58 | |||
59 | static enum GNUNET_GenericReturnValue | ||
60 | iterate_destroy_session (void *cls, | ||
61 | const struct GNUNET_HashCode *key, | ||
62 | void *value) | ||
63 | { | ||
64 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
65 | destroy_member_session (session); | ||
66 | return GNUNET_YES; | ||
67 | } | ||
68 | |||
69 | |||
70 | void | ||
71 | destroy_member (struct GNUNET_MESSENGER_Member *member) | ||
72 | { | ||
73 | GNUNET_assert ((member) && (member->sessions)); | ||
74 | |||
75 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
76 | iterate_destroy_session, NULL); | ||
77 | GNUNET_CONTAINER_multihashmap_destroy (member->sessions); | ||
78 | |||
79 | GNUNET_free (member); | ||
80 | } | ||
81 | |||
82 | |||
83 | const struct GNUNET_ShortHashCode* | ||
84 | get_member_id (const struct GNUNET_MESSENGER_Member *member) | ||
85 | { | ||
86 | GNUNET_assert (member); | ||
87 | |||
88 | return &(member->id); | ||
89 | } | ||
90 | |||
91 | |||
92 | static enum GNUNET_GenericReturnValue | ||
93 | callback_scan_for_sessions (void *cls, | ||
94 | const char *filename) | ||
95 | { | ||
96 | struct GNUNET_MESSENGER_Member *member = cls; | ||
97 | |||
98 | if (GNUNET_YES == GNUNET_DISK_directory_test (filename, GNUNET_YES)) | ||
99 | { | ||
100 | char *directory; | ||
101 | |||
102 | GNUNET_asprintf (&directory, "%s%c", filename, DIR_SEPARATOR); | ||
103 | |||
104 | load_member_session (member, directory); | ||
105 | GNUNET_free (directory); | ||
106 | } | ||
107 | |||
108 | return GNUNET_OK; | ||
109 | } | ||
110 | |||
111 | |||
112 | void | ||
113 | load_member (struct GNUNET_MESSENGER_MemberStore *store, | ||
114 | const char *directory) | ||
115 | { | ||
116 | GNUNET_assert ((store) && (directory)); | ||
117 | |||
118 | char *config_file; | ||
119 | GNUNET_asprintf (&config_file, "%s%s", directory, "member.cfg"); | ||
120 | |||
121 | struct GNUNET_MESSENGER_Member *member = NULL; | ||
122 | |||
123 | if (GNUNET_YES != GNUNET_DISK_file_test (config_file)) | ||
124 | goto free_config; | ||
125 | |||
126 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load member configuration: %s\n", | ||
127 | config_file); | ||
128 | |||
129 | struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create (); | ||
130 | |||
131 | if (GNUNET_OK == GNUNET_CONFIGURATION_parse (cfg, config_file)) | ||
132 | { | ||
133 | struct GNUNET_ShortHashCode id; | ||
134 | |||
135 | if (GNUNET_OK != GNUNET_CONFIGURATION_get_data (cfg, "member", "id", &id, | ||
136 | sizeof(id))) | ||
137 | goto destroy_config; | ||
138 | |||
139 | member = add_store_member (store, &id); | ||
140 | } | ||
141 | |||
142 | destroy_config: | ||
143 | |||
144 | GNUNET_CONFIGURATION_destroy (cfg); | ||
145 | |||
146 | free_config: | ||
147 | GNUNET_free (config_file); | ||
148 | |||
149 | if (! member) | ||
150 | return; | ||
151 | |||
152 | char *scan_dir; | ||
153 | GNUNET_asprintf (&scan_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
154 | |||
155 | if (GNUNET_OK == GNUNET_DISK_directory_test (scan_dir, GNUNET_YES)) | ||
156 | GNUNET_DISK_directory_scan (scan_dir, callback_scan_for_sessions, member); | ||
157 | |||
158 | GNUNET_free (scan_dir); | ||
159 | } | ||
160 | |||
161 | |||
162 | static enum GNUNET_GenericReturnValue | ||
163 | iterate_load_next_session (void *cls, | ||
164 | const struct GNUNET_HashCode *key, | ||
165 | void *value) | ||
166 | { | ||
167 | const char *sessions_directory = cls; | ||
168 | |||
169 | char *load_dir; | ||
170 | GNUNET_asprintf (&load_dir, "%s%s%c", sessions_directory, GNUNET_h2s (key), | ||
171 | DIR_SEPARATOR); | ||
172 | |||
173 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
174 | |||
175 | if (GNUNET_YES == GNUNET_DISK_directory_test (load_dir, GNUNET_YES)) | ||
176 | load_member_session_next (session, load_dir); | ||
177 | |||
178 | GNUNET_free (load_dir); | ||
179 | return GNUNET_YES; | ||
180 | } | ||
181 | |||
182 | |||
183 | void | ||
184 | load_member_next_sessions (const struct GNUNET_MESSENGER_Member *member, | ||
185 | const char *directory) | ||
186 | { | ||
187 | GNUNET_assert ((member) && (directory)); | ||
188 | |||
189 | char *load_dir; | ||
190 | GNUNET_asprintf (&load_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
191 | |||
192 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
193 | iterate_load_next_session, load_dir); | ||
194 | |||
195 | GNUNET_free (load_dir); | ||
196 | } | ||
197 | |||
198 | |||
199 | static enum GNUNET_GenericReturnValue | ||
200 | iterate_save_session (void *cls, | ||
201 | const struct GNUNET_HashCode *key, | ||
202 | void *value) | ||
203 | { | ||
204 | const char *sessions_directory = cls; | ||
205 | |||
206 | char *save_dir; | ||
207 | GNUNET_asprintf (&save_dir, "%s%s%c", sessions_directory, GNUNET_h2s (key), | ||
208 | DIR_SEPARATOR); | ||
209 | |||
210 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
211 | |||
212 | if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) || | ||
213 | (GNUNET_OK == GNUNET_DISK_directory_create (save_dir))) | ||
214 | save_member_session (session, save_dir); | ||
215 | |||
216 | GNUNET_free (save_dir); | ||
217 | return GNUNET_YES; | ||
218 | } | ||
219 | |||
220 | |||
221 | void | ||
222 | save_member (struct GNUNET_MESSENGER_Member *member, | ||
223 | const char *directory) | ||
224 | { | ||
225 | GNUNET_assert ((member) && (directory)); | ||
226 | |||
227 | char *config_file; | ||
228 | GNUNET_asprintf (&config_file, "%s%s", directory, "member.cfg"); | ||
229 | |||
230 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Save member configuration: %s\n", | ||
231 | config_file); | ||
232 | |||
233 | struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create (); | ||
234 | |||
235 | char *id_data = GNUNET_STRINGS_data_to_string_alloc (&(member->id), | ||
236 | sizeof(member->id)); | ||
237 | |||
238 | if (id_data) | ||
239 | { | ||
240 | GNUNET_CONFIGURATION_set_value_string (cfg, "member", "id", id_data); | ||
241 | |||
242 | GNUNET_free (id_data); | ||
243 | } | ||
244 | |||
245 | GNUNET_CONFIGURATION_write (cfg, config_file); | ||
246 | GNUNET_CONFIGURATION_destroy (cfg); | ||
247 | |||
248 | GNUNET_free (config_file); | ||
249 | |||
250 | char *save_dir; | ||
251 | GNUNET_asprintf (&save_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
252 | |||
253 | if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) || | ||
254 | (GNUNET_OK == GNUNET_DISK_directory_create (save_dir))) | ||
255 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
256 | iterate_save_session, save_dir); | ||
257 | |||
258 | GNUNET_free (save_dir); | ||
259 | } | ||
260 | |||
261 | |||
262 | static void | ||
263 | sync_session_contact_from_next (struct GNUNET_MESSENGER_MemberSession *session, | ||
264 | struct GNUNET_MESSENGER_MemberSession *next) | ||
265 | { | ||
266 | GNUNET_assert ((session) && (next)); | ||
267 | |||
268 | if (session == next) | ||
269 | return; | ||
270 | |||
271 | if (next->next) | ||
272 | sync_session_contact_from_next (session, next->next); | ||
273 | else | ||
274 | session->contact = next->contact; | ||
275 | } | ||
276 | |||
277 | |||
278 | static enum GNUNET_GenericReturnValue | ||
279 | iterate_sync_session_contact (void *cls, | ||
280 | const struct GNUNET_HashCode *key, | ||
281 | void *value) | ||
282 | { | ||
283 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
284 | |||
285 | if (session->next) | ||
286 | sync_session_contact_from_next (session, session->next); | ||
287 | |||
288 | return GNUNET_YES; | ||
289 | } | ||
290 | |||
291 | |||
292 | void | ||
293 | sync_member_contacts (struct GNUNET_MESSENGER_Member *member) | ||
294 | { | ||
295 | GNUNET_assert ((member) && (member->sessions)); | ||
296 | |||
297 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
298 | iterate_sync_session_contact, NULL); | ||
299 | } | ||
300 | |||
301 | |||
302 | struct GNUNET_MESSENGER_MemberSession* | ||
303 | get_member_session (const struct GNUNET_MESSENGER_Member *member, | ||
304 | const struct GNUNET_CRYPTO_PublicKey *public_key) | ||
305 | { | ||
306 | GNUNET_assert ((member) && (public_key)); | ||
307 | |||
308 | struct GNUNET_HashCode hash; | ||
309 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
310 | |||
311 | return GNUNET_CONTAINER_multihashmap_get (member->sessions, &hash); | ||
312 | } | ||
313 | |||
314 | |||
315 | struct GNUNET_MESSENGER_ClosureSearchSession | ||
316 | { | ||
317 | const struct GNUNET_MESSENGER_Message *message; | ||
318 | const struct GNUNET_HashCode *hash; | ||
319 | |||
320 | struct GNUNET_MESSENGER_MemberSession *match; | ||
321 | }; | ||
322 | |||
323 | static enum GNUNET_GenericReturnValue | ||
324 | iterate_search_session (void *cls, | ||
325 | const struct GNUNET_HashCode *key, | ||
326 | void *value) | ||
327 | { | ||
328 | struct GNUNET_MESSENGER_ClosureSearchSession *search = cls; | ||
329 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
330 | |||
331 | if (GNUNET_OK != verify_member_session_as_sender (session, search->message, | ||
332 | search->hash)) | ||
333 | return GNUNET_YES; | ||
334 | |||
335 | search->match = session; | ||
336 | return GNUNET_NO; | ||
337 | } | ||
338 | |||
339 | |||
340 | static struct GNUNET_MESSENGER_MemberSession* | ||
341 | try_member_session (struct GNUNET_MESSENGER_Member *member, | ||
342 | const struct GNUNET_CRYPTO_PublicKey *public_key) | ||
343 | { | ||
344 | struct GNUNET_MESSENGER_MemberSession *session = get_member_session (member, | ||
345 | public_key); | ||
346 | |||
347 | if (session) | ||
348 | return session; | ||
349 | |||
350 | session = create_member_session (member, public_key); | ||
351 | |||
352 | if (session) | ||
353 | add_member_session (member, session); | ||
354 | |||
355 | return session; | ||
356 | } | ||
357 | |||
358 | |||
359 | struct GNUNET_MESSENGER_MemberSession* | ||
360 | get_member_session_of (struct GNUNET_MESSENGER_Member *member, | ||
361 | const struct GNUNET_MESSENGER_Message *message, | ||
362 | const struct GNUNET_HashCode *hash) | ||
363 | { | ||
364 | GNUNET_assert ((member) && (message) && (hash) && | ||
365 | (0 == GNUNET_memcmp (&(member->id), | ||
366 | &(message->header.sender_id)))); | ||
367 | |||
368 | if (GNUNET_MESSENGER_KIND_JOIN == message->header.kind) | ||
369 | return try_member_session (member, &(message->body.join.key)); | ||
370 | |||
371 | struct GNUNET_MESSENGER_ClosureSearchSession search; | ||
372 | |||
373 | search.message = message; | ||
374 | search.hash = hash; | ||
375 | |||
376 | search.match = NULL; | ||
377 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
378 | iterate_search_session, &search); | ||
379 | |||
380 | return search.match; | ||
381 | } | ||
382 | |||
383 | |||
384 | void | ||
385 | add_member_session (struct GNUNET_MESSENGER_Member *member, | ||
386 | struct GNUNET_MESSENGER_MemberSession *session) | ||
387 | { | ||
388 | if (! session) | ||
389 | return; | ||
390 | |||
391 | GNUNET_assert ((member) && (session->member == member)); | ||
392 | |||
393 | const struct GNUNET_CRYPTO_PublicKey *public_key = | ||
394 | get_member_session_public_key (session); | ||
395 | |||
396 | struct GNUNET_HashCode hash; | ||
397 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
398 | |||
399 | if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put ( | ||
400 | member->sessions, &hash, session, | ||
401 | GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST)) | ||
402 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
403 | "Adding a member session failed: %s\n", | ||
404 | GNUNET_h2s (&hash)); | ||
405 | } | ||
406 | |||
407 | |||
408 | void | ||
409 | remove_member_session (struct GNUNET_MESSENGER_Member *member, | ||
410 | struct GNUNET_MESSENGER_MemberSession *session) | ||
411 | { | ||
412 | GNUNET_assert ((member) && (session) && (session->member == member)); | ||
413 | |||
414 | const struct GNUNET_CRYPTO_PublicKey *public_key = | ||
415 | get_member_session_public_key (session); | ||
416 | |||
417 | struct GNUNET_HashCode hash; | ||
418 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
419 | |||
420 | if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (member->sessions, | ||
421 | &hash, session)) | ||
422 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
423 | "Removing a member session failed: %s\n", | ||
424 | GNUNET_h2s (&hash)); | ||
425 | } | ||
426 | |||
427 | |||
428 | struct GNUNET_MESSENGER_ClosureIterateSessions | ||
429 | { | ||
430 | GNUNET_MESSENGER_MemberIteratorCallback it; | ||
431 | void *cls; | ||
432 | }; | ||
433 | |||
434 | static enum GNUNET_GenericReturnValue | ||
435 | iterate_member_sessions_it (void *cls, | ||
436 | const struct GNUNET_HashCode *key, | ||
437 | void *value) | ||
438 | { | ||
439 | struct GNUNET_MESSENGER_ClosureIterateSessions *iterate = cls; | ||
440 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
441 | |||
442 | return iterate->it (iterate->cls, get_member_session_public_key (session), | ||
443 | session); | ||
444 | } | ||
445 | |||
446 | |||
447 | int | ||
448 | iterate_member_sessions (struct GNUNET_MESSENGER_Member *member, | ||
449 | GNUNET_MESSENGER_MemberIteratorCallback it, | ||
450 | void *cls) | ||
451 | { | ||
452 | GNUNET_assert ((member) && (member->sessions) && (it)); | ||
453 | |||
454 | struct GNUNET_MESSENGER_ClosureIterateSessions iterate; | ||
455 | |||
456 | iterate.it = it; | ||
457 | iterate.cls = cls; | ||
458 | |||
459 | return GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
460 | iterate_member_sessions_it, | ||
461 | &iterate); | ||
462 | } | ||