diff options
Diffstat (limited to 'src/service/messenger/gnunet-service-messenger_member.c')
-rw-r--r-- | src/service/messenger/gnunet-service-messenger_member.c | 460 |
1 files changed, 460 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..c57daa062 --- /dev/null +++ b/src/service/messenger/gnunet-service-messenger_member.c | |||
@@ -0,0 +1,460 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2020--2023 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 | struct GNUNET_MESSENGER_Member* | ||
32 | create_member (struct GNUNET_MESSENGER_MemberStore *store, | ||
33 | const struct GNUNET_ShortHashCode *id) | ||
34 | { | ||
35 | GNUNET_assert (store); | ||
36 | |||
37 | struct GNUNET_MESSENGER_Member *member = GNUNET_new (struct | ||
38 | GNUNET_MESSENGER_Member); | ||
39 | |||
40 | member->store = store; | ||
41 | |||
42 | if (id) | ||
43 | GNUNET_memcpy (&(member->id), id, sizeof(member->id)); | ||
44 | else if (GNUNET_YES != generate_free_member_id (&(member->id), | ||
45 | store->members)) | ||
46 | { | ||
47 | GNUNET_free (member); | ||
48 | return NULL; | ||
49 | } | ||
50 | |||
51 | member->sessions = GNUNET_CONTAINER_multihashmap_create (2, GNUNET_NO); | ||
52 | |||
53 | return member; | ||
54 | } | ||
55 | |||
56 | |||
57 | static int | ||
58 | iterate_destroy_session (void *cls, | ||
59 | const struct GNUNET_HashCode *key, | ||
60 | void *value) | ||
61 | { | ||
62 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
63 | destroy_member_session (session); | ||
64 | return GNUNET_YES; | ||
65 | } | ||
66 | |||
67 | |||
68 | void | ||
69 | destroy_member (struct GNUNET_MESSENGER_Member *member) | ||
70 | { | ||
71 | GNUNET_assert ((member) && (member->sessions)); | ||
72 | |||
73 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
74 | iterate_destroy_session, NULL); | ||
75 | GNUNET_CONTAINER_multihashmap_destroy (member->sessions); | ||
76 | |||
77 | GNUNET_free (member); | ||
78 | } | ||
79 | |||
80 | |||
81 | const struct GNUNET_ShortHashCode* | ||
82 | get_member_id (const struct GNUNET_MESSENGER_Member *member) | ||
83 | { | ||
84 | GNUNET_assert (member); | ||
85 | |||
86 | return &(member->id); | ||
87 | } | ||
88 | |||
89 | |||
90 | static int | ||
91 | callback_scan_for_sessions (void *cls, | ||
92 | const char *filename) | ||
93 | { | ||
94 | struct GNUNET_MESSENGER_Member *member = cls; | ||
95 | |||
96 | if (GNUNET_YES == GNUNET_DISK_directory_test (filename, GNUNET_YES)) | ||
97 | { | ||
98 | char *directory; | ||
99 | |||
100 | GNUNET_asprintf (&directory, "%s%c", filename, DIR_SEPARATOR); | ||
101 | |||
102 | load_member_session (member, directory); | ||
103 | GNUNET_free (directory); | ||
104 | } | ||
105 | |||
106 | return GNUNET_OK; | ||
107 | } | ||
108 | |||
109 | |||
110 | void | ||
111 | load_member (struct GNUNET_MESSENGER_MemberStore *store, | ||
112 | const char *directory) | ||
113 | { | ||
114 | GNUNET_assert ((store) && (directory)); | ||
115 | |||
116 | char *config_file; | ||
117 | GNUNET_asprintf (&config_file, "%s%s", directory, "member.cfg"); | ||
118 | |||
119 | struct GNUNET_MESSENGER_Member *member = NULL; | ||
120 | |||
121 | if (GNUNET_YES != GNUNET_DISK_file_test (config_file)) | ||
122 | goto free_config; | ||
123 | |||
124 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Load member configuration: %s\n", | ||
125 | config_file); | ||
126 | |||
127 | struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create (); | ||
128 | |||
129 | if (GNUNET_OK == GNUNET_CONFIGURATION_parse (cfg, config_file)) | ||
130 | { | ||
131 | struct GNUNET_ShortHashCode id; | ||
132 | |||
133 | if (GNUNET_OK != GNUNET_CONFIGURATION_get_data (cfg, "member", "id", &id, | ||
134 | sizeof(id))) | ||
135 | goto destroy_config; | ||
136 | |||
137 | member = add_store_member (store, &id); | ||
138 | } | ||
139 | |||
140 | destroy_config: | ||
141 | |||
142 | GNUNET_CONFIGURATION_destroy (cfg); | ||
143 | |||
144 | free_config: | ||
145 | GNUNET_free (config_file); | ||
146 | |||
147 | if (! member) | ||
148 | return; | ||
149 | |||
150 | char *scan_dir; | ||
151 | GNUNET_asprintf (&scan_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
152 | |||
153 | if (GNUNET_OK == GNUNET_DISK_directory_test (scan_dir, GNUNET_YES)) | ||
154 | GNUNET_DISK_directory_scan (scan_dir, callback_scan_for_sessions, member); | ||
155 | |||
156 | GNUNET_free (scan_dir); | ||
157 | } | ||
158 | |||
159 | |||
160 | static int | ||
161 | iterate_load_next_session (void *cls, | ||
162 | const struct GNUNET_HashCode *key, | ||
163 | void *value) | ||
164 | { | ||
165 | const char *sessions_directory = cls; | ||
166 | |||
167 | char *load_dir; | ||
168 | GNUNET_asprintf (&load_dir, "%s%s%c", sessions_directory, GNUNET_h2s (key), | ||
169 | DIR_SEPARATOR); | ||
170 | |||
171 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
172 | |||
173 | if (GNUNET_YES == GNUNET_DISK_directory_test (load_dir, GNUNET_YES)) | ||
174 | load_member_session_next (session, load_dir); | ||
175 | |||
176 | GNUNET_free (load_dir); | ||
177 | return GNUNET_YES; | ||
178 | } | ||
179 | |||
180 | |||
181 | void | ||
182 | load_member_next_sessions (const struct GNUNET_MESSENGER_Member *member, | ||
183 | const char *directory) | ||
184 | { | ||
185 | GNUNET_assert ((member) && (directory)); | ||
186 | |||
187 | char *load_dir; | ||
188 | GNUNET_asprintf (&load_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
189 | |||
190 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
191 | iterate_load_next_session, load_dir); | ||
192 | |||
193 | GNUNET_free (load_dir); | ||
194 | } | ||
195 | |||
196 | |||
197 | static int | ||
198 | iterate_save_session (void *cls, | ||
199 | const struct GNUNET_HashCode *key, | ||
200 | void *value) | ||
201 | { | ||
202 | const char *sessions_directory = cls; | ||
203 | |||
204 | char *save_dir; | ||
205 | GNUNET_asprintf (&save_dir, "%s%s%c", sessions_directory, GNUNET_h2s (key), | ||
206 | DIR_SEPARATOR); | ||
207 | |||
208 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
209 | |||
210 | if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) || | ||
211 | (GNUNET_OK == GNUNET_DISK_directory_create (save_dir))) | ||
212 | save_member_session (session, save_dir); | ||
213 | |||
214 | GNUNET_free (save_dir); | ||
215 | return GNUNET_YES; | ||
216 | } | ||
217 | |||
218 | |||
219 | void | ||
220 | save_member (struct GNUNET_MESSENGER_Member *member, | ||
221 | const char *directory) | ||
222 | { | ||
223 | GNUNET_assert ((member) && (directory)); | ||
224 | |||
225 | char *config_file; | ||
226 | GNUNET_asprintf (&config_file, "%s%s", directory, "member.cfg"); | ||
227 | |||
228 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Save member configuration: %s\n", | ||
229 | config_file); | ||
230 | |||
231 | struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create (); | ||
232 | |||
233 | char *id_data = GNUNET_STRINGS_data_to_string_alloc (&(member->id), | ||
234 | sizeof(member->id)); | ||
235 | |||
236 | if (id_data) | ||
237 | { | ||
238 | GNUNET_CONFIGURATION_set_value_string (cfg, "member", "id", id_data); | ||
239 | |||
240 | GNUNET_free (id_data); | ||
241 | } | ||
242 | |||
243 | GNUNET_CONFIGURATION_write (cfg, config_file); | ||
244 | GNUNET_CONFIGURATION_destroy (cfg); | ||
245 | |||
246 | GNUNET_free (config_file); | ||
247 | |||
248 | char *save_dir; | ||
249 | GNUNET_asprintf (&save_dir, "%s%s%c", directory, "sessions", DIR_SEPARATOR); | ||
250 | |||
251 | if ((GNUNET_YES == GNUNET_DISK_directory_test (save_dir, GNUNET_NO)) || | ||
252 | (GNUNET_OK == GNUNET_DISK_directory_create (save_dir))) | ||
253 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
254 | iterate_save_session, save_dir); | ||
255 | |||
256 | GNUNET_free (save_dir); | ||
257 | } | ||
258 | |||
259 | |||
260 | static void | ||
261 | sync_session_contact_from_next (struct GNUNET_MESSENGER_MemberSession *session, | ||
262 | struct GNUNET_MESSENGER_MemberSession *next) | ||
263 | { | ||
264 | GNUNET_assert ((session) && (next)); | ||
265 | |||
266 | if (session == next) | ||
267 | return; | ||
268 | |||
269 | if (next->next) | ||
270 | sync_session_contact_from_next (session, next->next); | ||
271 | else | ||
272 | session->contact = next->contact; | ||
273 | } | ||
274 | |||
275 | |||
276 | static int | ||
277 | iterate_sync_session_contact (void *cls, | ||
278 | const struct GNUNET_HashCode *key, | ||
279 | void *value) | ||
280 | { | ||
281 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
282 | |||
283 | if (session->next) | ||
284 | sync_session_contact_from_next (session, session->next); | ||
285 | |||
286 | return GNUNET_YES; | ||
287 | } | ||
288 | |||
289 | |||
290 | void | ||
291 | sync_member_contacts (struct GNUNET_MESSENGER_Member *member) | ||
292 | { | ||
293 | GNUNET_assert ((member) && (member->sessions)); | ||
294 | |||
295 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
296 | iterate_sync_session_contact, NULL); | ||
297 | } | ||
298 | |||
299 | |||
300 | struct GNUNET_MESSENGER_MemberSession* | ||
301 | get_member_session (const struct GNUNET_MESSENGER_Member *member, | ||
302 | const struct GNUNET_CRYPTO_PublicKey *public_key) | ||
303 | { | ||
304 | GNUNET_assert ((member) && (public_key)); | ||
305 | |||
306 | struct GNUNET_HashCode hash; | ||
307 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
308 | |||
309 | return GNUNET_CONTAINER_multihashmap_get (member->sessions, &hash); | ||
310 | } | ||
311 | |||
312 | |||
313 | struct GNUNET_MESSENGER_ClosureSearchSession | ||
314 | { | ||
315 | const struct GNUNET_MESSENGER_Message *message; | ||
316 | const struct GNUNET_HashCode *hash; | ||
317 | |||
318 | struct GNUNET_MESSENGER_MemberSession *match; | ||
319 | }; | ||
320 | |||
321 | static int | ||
322 | iterate_search_session (void *cls, | ||
323 | const struct GNUNET_HashCode *key, | ||
324 | void *value) | ||
325 | { | ||
326 | struct GNUNET_MESSENGER_ClosureSearchSession *search = cls; | ||
327 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
328 | |||
329 | if (GNUNET_OK != verify_member_session_as_sender (session, search->message, | ||
330 | search->hash)) | ||
331 | return GNUNET_YES; | ||
332 | |||
333 | search->match = session; | ||
334 | return GNUNET_NO; | ||
335 | } | ||
336 | |||
337 | |||
338 | static struct GNUNET_MESSENGER_MemberSession* | ||
339 | try_member_session (struct GNUNET_MESSENGER_Member *member, | ||
340 | const struct GNUNET_CRYPTO_PublicKey *public_key) | ||
341 | { | ||
342 | struct GNUNET_MESSENGER_MemberSession *session = get_member_session (member, | ||
343 | public_key); | ||
344 | |||
345 | if (session) | ||
346 | return session; | ||
347 | |||
348 | session = create_member_session (member, public_key); | ||
349 | |||
350 | if (session) | ||
351 | add_member_session (member, session); | ||
352 | |||
353 | return session; | ||
354 | } | ||
355 | |||
356 | |||
357 | struct GNUNET_MESSENGER_MemberSession* | ||
358 | get_member_session_of (struct GNUNET_MESSENGER_Member *member, | ||
359 | const struct GNUNET_MESSENGER_Message *message, | ||
360 | const struct GNUNET_HashCode *hash) | ||
361 | { | ||
362 | GNUNET_assert ((member) && (message) && (hash) && | ||
363 | (0 == GNUNET_memcmp (&(member->id), | ||
364 | &(message->header.sender_id)))); | ||
365 | |||
366 | if (GNUNET_MESSENGER_KIND_JOIN == message->header.kind) | ||
367 | return try_member_session (member, &(message->body.join.key)); | ||
368 | |||
369 | struct GNUNET_MESSENGER_ClosureSearchSession search; | ||
370 | |||
371 | search.message = message; | ||
372 | search.hash = hash; | ||
373 | |||
374 | search.match = NULL; | ||
375 | GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
376 | iterate_search_session, &search); | ||
377 | |||
378 | return search.match; | ||
379 | } | ||
380 | |||
381 | |||
382 | void | ||
383 | add_member_session (struct GNUNET_MESSENGER_Member *member, | ||
384 | struct GNUNET_MESSENGER_MemberSession *session) | ||
385 | { | ||
386 | if (! session) | ||
387 | return; | ||
388 | |||
389 | GNUNET_assert ((member) && (session->member == member)); | ||
390 | |||
391 | const struct GNUNET_CRYPTO_PublicKey *public_key = | ||
392 | get_member_session_public_key (session); | ||
393 | |||
394 | struct GNUNET_HashCode hash; | ||
395 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
396 | |||
397 | if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put ( | ||
398 | member->sessions, &hash, session, | ||
399 | GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST)) | ||
400 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
401 | "Adding a member session failed: %s\n", | ||
402 | GNUNET_h2s (&hash)); | ||
403 | } | ||
404 | |||
405 | |||
406 | void | ||
407 | remove_member_session (struct GNUNET_MESSENGER_Member *member, | ||
408 | struct GNUNET_MESSENGER_MemberSession *session) | ||
409 | { | ||
410 | GNUNET_assert ((member) && (session) && (session->member == member)); | ||
411 | |||
412 | const struct GNUNET_CRYPTO_PublicKey *public_key = | ||
413 | get_member_session_public_key (session); | ||
414 | |||
415 | struct GNUNET_HashCode hash; | ||
416 | GNUNET_CRYPTO_hash (public_key, sizeof(*public_key), &hash); | ||
417 | |||
418 | if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (member->sessions, | ||
419 | &hash, session)) | ||
420 | GNUNET_log (GNUNET_ERROR_TYPE_WARNING, | ||
421 | "Removing a member session failed: %s\n", | ||
422 | GNUNET_h2s (&hash)); | ||
423 | } | ||
424 | |||
425 | |||
426 | struct GNUNET_MESSENGER_ClosureIterateSessions | ||
427 | { | ||
428 | GNUNET_MESSENGER_MemberIteratorCallback it; | ||
429 | void *cls; | ||
430 | }; | ||
431 | |||
432 | static int | ||
433 | iterate_member_sessions_it (void *cls, | ||
434 | const struct GNUNET_HashCode *key, | ||
435 | void *value) | ||
436 | { | ||
437 | struct GNUNET_MESSENGER_ClosureIterateSessions *iterate = cls; | ||
438 | struct GNUNET_MESSENGER_MemberSession *session = value; | ||
439 | |||
440 | return iterate->it (iterate->cls, get_member_session_public_key (session), | ||
441 | session); | ||
442 | } | ||
443 | |||
444 | |||
445 | int | ||
446 | iterate_member_sessions (struct GNUNET_MESSENGER_Member *member, | ||
447 | GNUNET_MESSENGER_MemberIteratorCallback it, | ||
448 | void *cls) | ||
449 | { | ||
450 | GNUNET_assert ((member) && (member->sessions) && (it)); | ||
451 | |||
452 | struct GNUNET_MESSENGER_ClosureIterateSessions iterate; | ||
453 | |||
454 | iterate.it = it; | ||
455 | iterate.cls = cls; | ||
456 | |||
457 | return GNUNET_CONTAINER_multihashmap_iterate (member->sessions, | ||
458 | iterate_member_sessions_it, | ||
459 | &iterate); | ||
460 | } | ||