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-rw-r--r--src/reclaim/plugin_reclaim_sqlite.c734
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diff --git a/src/reclaim/plugin_reclaim_sqlite.c b/src/reclaim/plugin_reclaim_sqlite.c
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1 /*
2 * This file is part of GNUnet
3 * Copyright (C) 2009-2017 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
19/**
20 * @file reclaim/plugin_reclaim_sqlite.c
21 * @brief sqlite-based idp backend
22 * @author Martin Schanzenbach
23 */
24
25#include "platform.h"
26#include "gnunet_reclaim_service.h"
27#include "gnunet_reclaim_plugin.h"
28#include "gnunet_reclaim_attribute_lib.h"
29#include "gnunet_sq_lib.h"
30#include <sqlite3.h>
31
32/**
33 * After how many ms "busy" should a DB operation fail for good? A
34 * low value makes sure that we are more responsive to requests
35 * (especially PUTs). A high value guarantees a higher success rate
36 * (SELECTs in iterate can take several seconds despite LIMIT=1).
37 *
38 * The default value of 1s should ensure that users do not experience
39 * huge latencies while at the same time allowing operations to
40 * succeed with reasonable probability.
41 */
42#define BUSY_TIMEOUT_MS 1000
43
44
45/**
46 * Log an error message at log-level 'level' that indicates
47 * a failure of the command 'cmd' on file 'filename'
48 * with the message given by strerror(errno).
49 */
50#define LOG_SQLITE(db, level, cmd) do { GNUNET_log_from (level, "reclaim", _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); } while(0)
51
52#define LOG(kind,...) GNUNET_log_from (kind, "reclaim-sqlite", __VA_ARGS__)
53
54
55/**
56 * Context for all functions in this plugin.
57 */
58struct Plugin
59{
60
61 const struct GNUNET_CONFIGURATION_Handle *cfg;
62
63 /**
64 * Database filename.
65 */
66 char *fn;
67
68 /**
69 * Native SQLite database handle.
70 */
71 sqlite3 *dbh;
72
73 /**
74 * Precompiled SQL to store ticket.
75 */
76 sqlite3_stmt *store_ticket;
77
78 /**
79 * Precompiled SQL to delete existing ticket.
80 */
81 sqlite3_stmt *delete_ticket;
82
83 /**
84 * Precompiled SQL to iterate tickets.
85 */
86 sqlite3_stmt *iterate_tickets;
87
88 /**
89 * Precompiled SQL to get ticket attributes.
90 */
91 sqlite3_stmt *get_ticket_attrs;
92
93 /**
94 * Precompiled SQL to iterate tickets by audience.
95 */
96 sqlite3_stmt *iterate_tickets_by_audience;
97};
98
99
100/**
101 * @brief Prepare a SQL statement
102 *
103 * @param dbh handle to the database
104 * @param zSql SQL statement, UTF-8 encoded
105 * @param ppStmt set to the prepared statement
106 * @return 0 on success
107 */
108static int
109sq_prepare (sqlite3 *dbh,
110 const char *zSql,
111 sqlite3_stmt **ppStmt)
112{
113 char *dummy;
114 int result;
115
116 result =
117 sqlite3_prepare_v2 (dbh,
118 zSql,
119 strlen (zSql),
120 ppStmt,
121 (const char **) &dummy);
122 LOG (GNUNET_ERROR_TYPE_DEBUG,
123 "Prepared `%s' / %p: %d\n",
124 zSql,
125 *ppStmt,
126 result);
127 return result;
128}
129
130/**
131 * Create our database indices.
132 *
133 * @param dbh handle to the database
134 */
135static void
136create_indices (sqlite3 * dbh)
137{
138 /* create indices */
139 if ( (SQLITE_OK !=
140 sqlite3_exec (dbh,
141 "CREATE INDEX IF NOT EXISTS identity_reverse ON identity001tickets (identity,audience)",
142 NULL, NULL, NULL)) ||
143 (SQLITE_OK !=
144 sqlite3_exec (dbh,
145 "CREATE INDEX IF NOT EXISTS it_iter ON identity001tickets (rnd)",
146 NULL, NULL, NULL)) )
147 LOG (GNUNET_ERROR_TYPE_ERROR,
148 "Failed to create indices: %s\n",
149 sqlite3_errmsg (dbh));
150}
151
152
153
154#if 0
155#define CHECK(a) GNUNET_break(a)
156#define ENULL NULL
157#else
158#define ENULL &e
159#define ENULL_DEFINED 1
160#define CHECK(a) if (! (a)) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "%s\n", e); sqlite3_free(e); }
161#endif
162
163
164/**
165 * Initialize the database connections and associated
166 * data structures (create tables and indices
167 * as needed as well).
168 *
169 * @param plugin the plugin context (state for this module)
170 * @return #GNUNET_OK on success
171 */
172static int
173database_setup (struct Plugin *plugin)
174{
175 sqlite3_stmt *stmt;
176 char *afsdir;
177#if ENULL_DEFINED
178 char *e;
179#endif
180
181 if (GNUNET_OK !=
182 GNUNET_CONFIGURATION_get_value_filename (plugin->cfg,
183 "reclaim-sqlite",
184 "FILENAME",
185 &afsdir))
186 {
187 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
188 "reclaim-sqlite",
189 "FILENAME");
190 return GNUNET_SYSERR;
191 }
192 if (GNUNET_OK !=
193 GNUNET_DISK_file_test (afsdir))
194 {
195 if (GNUNET_OK !=
196 GNUNET_DISK_directory_create_for_file (afsdir))
197 {
198 GNUNET_break (0);
199 GNUNET_free (afsdir);
200 return GNUNET_SYSERR;
201 }
202 }
203 /* afsdir should be UTF-8-encoded. If it isn't, it's a bug */
204 plugin->fn = afsdir;
205
206 /* Open database and precompile statements */
207 if (sqlite3_open (plugin->fn, &plugin->dbh) != SQLITE_OK)
208 {
209 LOG (GNUNET_ERROR_TYPE_ERROR,
210 _("Unable to initialize SQLite: %s.\n"),
211 sqlite3_errmsg (plugin->dbh));
212 return GNUNET_SYSERR;
213 }
214 CHECK (SQLITE_OK ==
215 sqlite3_exec (plugin->dbh,
216 "PRAGMA temp_store=MEMORY", NULL, NULL,
217 ENULL));
218 CHECK (SQLITE_OK ==
219 sqlite3_exec (plugin->dbh,
220 "PRAGMA synchronous=NORMAL", NULL, NULL,
221 ENULL));
222 CHECK (SQLITE_OK ==
223 sqlite3_exec (plugin->dbh,
224 "PRAGMA legacy_file_format=OFF", NULL, NULL,
225 ENULL));
226 CHECK (SQLITE_OK ==
227 sqlite3_exec (plugin->dbh,
228 "PRAGMA auto_vacuum=INCREMENTAL", NULL,
229 NULL, ENULL));
230 CHECK (SQLITE_OK ==
231 sqlite3_exec (plugin->dbh,
232 "PRAGMA encoding=\"UTF-8\"", NULL,
233 NULL, ENULL));
234 CHECK (SQLITE_OK ==
235 sqlite3_exec (plugin->dbh,
236 "PRAGMA locking_mode=EXCLUSIVE", NULL, NULL,
237 ENULL));
238 CHECK (SQLITE_OK ==
239 sqlite3_exec (plugin->dbh,
240 "PRAGMA page_size=4092", NULL, NULL,
241 ENULL));
242
243 CHECK (SQLITE_OK ==
244 sqlite3_busy_timeout (plugin->dbh,
245 BUSY_TIMEOUT_MS));
246
247
248 /* Create table */
249 CHECK (SQLITE_OK ==
250 sq_prepare (plugin->dbh,
251 "SELECT 1 FROM sqlite_master WHERE tbl_name = 'identity001tickets'",
252 &stmt));
253 if ((sqlite3_step (stmt) == SQLITE_DONE) &&
254 (sqlite3_exec
255 (plugin->dbh,
256 "CREATE TABLE identity001tickets ("
257 " identity BLOB NOT NULL DEFAULT '',"
258 " audience BLOB NOT NULL DEFAULT '',"
259 " rnd INT8 NOT NULL DEFAULT '',"
260 " attributes BLOB NOT NULL DEFAULT ''"
261 ")",
262 NULL, NULL, NULL) != SQLITE_OK))
263 {
264 LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR,
265 "sqlite3_exec");
266 sqlite3_finalize (stmt);
267 return GNUNET_SYSERR;
268 }
269 sqlite3_finalize (stmt);
270
271 create_indices (plugin->dbh);
272
273 if ( (SQLITE_OK !=
274 sq_prepare (plugin->dbh,
275 "INSERT INTO identity001tickets (identity, audience, rnd, attributes)"
276 " VALUES (?, ?, ?, ?)",
277 &plugin->store_ticket)) ||
278 (SQLITE_OK !=
279 sq_prepare (plugin->dbh,
280 "DELETE FROM identity001tickets WHERE identity=? AND rnd=?",
281 &plugin->delete_ticket)) ||
282 (SQLITE_OK !=
283 sq_prepare (plugin->dbh,
284 "SELECT identity,audience,rnd,attributes"
285 " FROM identity001tickets WHERE identity=? AND rnd=?",
286 &plugin->get_ticket_attrs)) ||
287 (SQLITE_OK !=
288 sq_prepare (plugin->dbh,
289 "SELECT identity,audience,rnd,attributes"
290 " FROM identity001tickets WHERE identity=?"
291 " ORDER BY rnd LIMIT 1 OFFSET ?",
292 &plugin->iterate_tickets)) ||
293 (SQLITE_OK !=
294 sq_prepare (plugin->dbh,
295 "SELECT identity,audience,rnd,attributes"
296 " FROM identity001tickets WHERE audience=?"
297 " ORDER BY rnd LIMIT 1 OFFSET ?",
298 &plugin->iterate_tickets_by_audience)) )
299 {
300 LOG_SQLITE (plugin,
301 GNUNET_ERROR_TYPE_ERROR,
302 "precompiling");
303 return GNUNET_SYSERR;
304 }
305 return GNUNET_OK;
306}
307
308
309/**
310 * Shutdown database connection and associate data
311 * structures.
312 * @param plugin the plugin context (state for this module)
313 */
314static void
315database_shutdown (struct Plugin *plugin)
316{
317 int result;
318 sqlite3_stmt *stmt;
319
320 if (NULL != plugin->store_ticket)
321 sqlite3_finalize (plugin->store_ticket);
322 if (NULL != plugin->delete_ticket)
323 sqlite3_finalize (plugin->delete_ticket);
324 if (NULL != plugin->iterate_tickets)
325 sqlite3_finalize (plugin->iterate_tickets);
326 if (NULL != plugin->iterate_tickets_by_audience)
327 sqlite3_finalize (plugin->iterate_tickets_by_audience);
328 if (NULL != plugin->get_ticket_attrs)
329 sqlite3_finalize (plugin->get_ticket_attrs);
330 result = sqlite3_close (plugin->dbh);
331 if (result == SQLITE_BUSY)
332 {
333 LOG (GNUNET_ERROR_TYPE_WARNING,
334 _("Tried to close sqlite without finalizing all prepared statements.\n"));
335 stmt = sqlite3_next_stmt (plugin->dbh,
336 NULL);
337 while (NULL != stmt)
338 {
339 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
340 "sqlite",
341 "Closing statement %p\n",
342 stmt);
343 result = sqlite3_finalize (stmt);
344 if (result != SQLITE_OK)
345 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
346 "sqlite",
347 "Failed to close statement %p: %d\n",
348 stmt,
349 result);
350 stmt = sqlite3_next_stmt (plugin->dbh,
351 NULL);
352 }
353 result = sqlite3_close (plugin->dbh);
354 }
355 if (SQLITE_OK != result)
356 LOG_SQLITE (plugin,
357 GNUNET_ERROR_TYPE_ERROR,
358 "sqlite3_close");
359
360 GNUNET_free_non_null (plugin->fn);
361}
362
363
364/**
365 * Store a ticket in the database.
366 *
367 * @param cls closure (internal context for the plugin)
368 * @param ticket the ticket to persist
369 * @param attrs the attributes associated with the ticket
370 * @return #GNUNET_OK on success, else #GNUNET_SYSERR
371 */
372static int
373reclaim_sqlite_store_ticket (void *cls,
374 const struct GNUNET_RECLAIM_Ticket *ticket,
375 const struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs)
376{
377 struct Plugin *plugin = cls;
378 size_t attrs_len;
379 char *attrs_ser;
380 int n;
381
382 {
383 /* First delete duplicates */
384 struct GNUNET_SQ_QueryParam dparams[] = {
385 GNUNET_SQ_query_param_auto_from_type (&ticket->identity),
386 GNUNET_SQ_query_param_uint64 (&ticket->rnd),
387 GNUNET_SQ_query_param_end
388 };
389 if (GNUNET_OK !=
390 GNUNET_SQ_bind (plugin->delete_ticket,
391 dparams))
392 {
393 LOG_SQLITE (plugin,
394 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
395 "sqlite3_bind_XXXX");
396 GNUNET_SQ_reset (plugin->dbh,
397 plugin->delete_ticket);
398 return GNUNET_SYSERR;
399 }
400 n = sqlite3_step (plugin->delete_ticket);
401 GNUNET_SQ_reset (plugin->dbh,
402 plugin->delete_ticket);
403
404 attrs_len = GNUNET_RECLAIM_ATTRIBUTE_list_serialize_get_size (attrs);
405 attrs_ser = GNUNET_malloc (attrs_len);
406 GNUNET_RECLAIM_ATTRIBUTE_list_serialize (attrs,
407 attrs_ser);
408 struct GNUNET_SQ_QueryParam sparams[] = {
409 GNUNET_SQ_query_param_auto_from_type (&ticket->identity),
410 GNUNET_SQ_query_param_auto_from_type (&ticket->audience),
411 GNUNET_SQ_query_param_uint64 (&ticket->rnd),
412 GNUNET_SQ_query_param_fixed_size (attrs_ser, attrs_len),
413 GNUNET_SQ_query_param_end
414 };
415
416 if (GNUNET_OK !=
417 GNUNET_SQ_bind (plugin->store_ticket,
418 sparams))
419 {
420 LOG_SQLITE (plugin,
421 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
422 "sqlite3_bind_XXXX");
423 GNUNET_SQ_reset (plugin->dbh,
424 plugin->store_ticket);
425 return GNUNET_SYSERR;
426 }
427 n = sqlite3_step (plugin->store_ticket);
428 GNUNET_SQ_reset (plugin->dbh,
429 plugin->store_ticket);
430 GNUNET_free (attrs_ser);
431 }
432 switch (n)
433 {
434 case SQLITE_DONE:
435 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
436 "sqlite",
437 "Ticket stored\n");
438 return GNUNET_OK;
439 case SQLITE_BUSY:
440 LOG_SQLITE (plugin,
441 GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
442 "sqlite3_step");
443 return GNUNET_NO;
444 default:
445 LOG_SQLITE (plugin,
446 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
447 "sqlite3_step");
448 return GNUNET_SYSERR;
449 }
450}
451
452
453/**
454 * Store a ticket in the database.
455 *
456 * @param cls closure (internal context for the plugin)
457 * @param ticket the ticket to delete
458 * @return #GNUNET_OK on success, else #GNUNET_SYSERR
459 */
460static int
461reclaim_sqlite_delete_ticket (void *cls,
462 const struct GNUNET_RECLAIM_Ticket *ticket)
463{
464 struct Plugin *plugin = cls;
465 int n;
466
467 {
468 struct GNUNET_SQ_QueryParam sparams[] = {
469 GNUNET_SQ_query_param_auto_from_type (&ticket->identity),
470 GNUNET_SQ_query_param_uint64 (&ticket->rnd),
471 GNUNET_SQ_query_param_end
472 };
473
474 if (GNUNET_OK !=
475 GNUNET_SQ_bind (plugin->delete_ticket,
476 sparams))
477 {
478 LOG_SQLITE (plugin,
479 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
480 "sqlite3_bind_XXXX");
481 GNUNET_SQ_reset (plugin->dbh,
482 plugin->store_ticket);
483 return GNUNET_SYSERR;
484 }
485 n = sqlite3_step (plugin->delete_ticket);
486 GNUNET_SQ_reset (plugin->dbh,
487 plugin->delete_ticket);
488 }
489 switch (n)
490 {
491 case SQLITE_DONE:
492 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
493 "sqlite",
494 "Ticket deleted\n");
495 return GNUNET_OK;
496 case SQLITE_BUSY:
497 LOG_SQLITE (plugin,
498 GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
499 "sqlite3_step");
500 return GNUNET_NO;
501 default:
502 LOG_SQLITE (plugin,
503 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
504 "sqlite3_step");
505 return GNUNET_SYSERR;
506 }
507}
508
509
510/**
511 * The given 'sqlite' statement has been prepared to be run.
512 * It will return a record which should be given to the iterator.
513 * Runs the statement and parses the returned record.
514 *
515 * @param plugin plugin context
516 * @param stmt to run (and then clean up)
517 * @param iter iterator to call with the result
518 * @param iter_cls closure for @a iter
519 * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error
520 */
521static int
522get_ticket_and_call_iterator (struct Plugin *plugin,
523 sqlite3_stmt *stmt,
524 GNUNET_RECLAIM_TicketIterator iter,
525 void *iter_cls)
526{
527 struct GNUNET_RECLAIM_Ticket ticket;
528 struct GNUNET_RECLAIM_ATTRIBUTE_ClaimList *attrs;
529 int ret;
530 int sret;
531 size_t attrs_len;
532 char *attrs_ser;
533
534 ret = GNUNET_NO;
535 if (SQLITE_ROW == (sret = sqlite3_step (stmt)))
536 {
537 struct GNUNET_SQ_ResultSpec rs[] = {
538 GNUNET_SQ_result_spec_auto_from_type (&ticket.identity),
539 GNUNET_SQ_result_spec_auto_from_type (&ticket.audience),
540 GNUNET_SQ_result_spec_uint64 (&ticket.rnd),
541 GNUNET_SQ_result_spec_variable_size ((void**)&attrs_ser,
542 &attrs_len),
543 GNUNET_SQ_result_spec_end
544
545 };
546 ret = GNUNET_SQ_extract_result (stmt,
547 rs);
548 if (GNUNET_OK != ret)
549 {
550 GNUNET_break (0);
551 ret = GNUNET_SYSERR;
552 }
553 else
554 {
555 attrs = GNUNET_RECLAIM_ATTRIBUTE_list_deserialize (attrs_ser,
556 attrs_len);
557 if (NULL != iter)
558 iter (iter_cls,
559 &ticket,
560 attrs);
561 GNUNET_RECLAIM_ATTRIBUTE_list_destroy (attrs);
562 ret = GNUNET_YES;
563 }
564 GNUNET_SQ_cleanup_result (rs);
565 }
566 else
567 {
568 if (SQLITE_DONE != sret)
569 LOG_SQLITE (plugin,
570 GNUNET_ERROR_TYPE_ERROR,
571 "sqlite_step");
572 }
573 GNUNET_SQ_reset (plugin->dbh,
574 stmt);
575 return ret;
576}
577
578
579/**
580 * Lookup tickets in the datastore.
581 *
582 * @param cls closure (internal context for the plugin)
583 * @param ticket the ticket to retrieve attributes for
584 * @param iter function to call with the result
585 * @param iter_cls closure for @a iter
586 * @return #GNUNET_OK on success, else #GNUNET_SYSERR
587 */
588static int
589reclaim_sqlite_ticket_get_attrs (void *cls,
590 const struct GNUNET_RECLAIM_Ticket *ticket,
591 GNUNET_RECLAIM_TicketIterator iter,
592 void *iter_cls)
593{
594 struct Plugin *plugin = cls;
595 struct GNUNET_SQ_QueryParam params[] = {
596 GNUNET_SQ_query_param_auto_from_type (&ticket->identity),
597 GNUNET_SQ_query_param_uint64 (&ticket->rnd),
598 GNUNET_SQ_query_param_end
599 };
600
601 if (GNUNET_OK !=
602 GNUNET_SQ_bind (plugin->get_ticket_attrs,
603 params))
604 {
605 LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
606 "sqlite3_bind_XXXX");
607 GNUNET_SQ_reset (plugin->dbh,
608 plugin->get_ticket_attrs);
609 return GNUNET_SYSERR;
610 }
611 return get_ticket_and_call_iterator (plugin,
612 plugin->get_ticket_attrs,
613 iter,
614 iter_cls);
615}
616
617
618/**
619 * Iterate over the results for a particular key and zone in the
620 * datastore. Will return at most one result to the iterator.
621 *
622 * @param cls closure (internal context for the plugin)
623 * @param identity the issuing identity or audience (depending on audience switch)
624 * @param audience GNUNET_YES if identity is audience
625 * @param offset offset in the list of all matching records
626 * @param iter function to call with the result
627 * @param iter_cls closure for @a iter
628 * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error
629 */
630static int
631reclaim_sqlite_iterate_tickets (void *cls,
632 const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
633 int audience,
634 uint64_t offset,
635 GNUNET_RECLAIM_TicketIterator iter,
636 void *iter_cls)
637{
638 struct Plugin *plugin = cls;
639 sqlite3_stmt *stmt;
640 int err;
641
642 if (NULL == identity)
643 {
644 GNUNET_break (0);
645 return GNUNET_SYSERR;
646 }
647 struct GNUNET_SQ_QueryParam params[] = {
648 GNUNET_SQ_query_param_auto_from_type (identity),
649 GNUNET_SQ_query_param_uint64 (&offset),
650 GNUNET_SQ_query_param_end
651 };
652 if (GNUNET_YES == audience)
653 {
654 stmt = plugin->iterate_tickets_by_audience;
655 err = GNUNET_SQ_bind (stmt,
656 params);
657 }
658 else
659 {
660 stmt = plugin->iterate_tickets;
661 err = GNUNET_SQ_bind (stmt,
662 params);
663 }
664 if (GNUNET_OK != err)
665 {
666 LOG_SQLITE (plugin,
667 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
668 "sqlite3_bind_XXXX");
669 GNUNET_SQ_reset (plugin->dbh,
670 stmt);
671 return GNUNET_SYSERR;
672 }
673 return get_ticket_and_call_iterator (plugin,
674 stmt,
675 iter,
676 iter_cls);
677}
678
679
680/**
681 * Entry point for the plugin.
682 *
683 * @param cls the "struct GNUNET_RECLAIM_PluginEnvironment*"
684 * @return NULL on error, otherwise the plugin context
685 */
686void *
687libgnunet_plugin_reclaim_sqlite_init (void *cls)
688{
689 static struct Plugin plugin;
690 const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
691 struct GNUNET_RECLAIM_PluginFunctions *api;
692
693 if (NULL != plugin.cfg)
694 return NULL; /* can only initialize once! */
695 memset (&plugin, 0, sizeof (struct Plugin));
696 plugin.cfg = cfg;
697 if (GNUNET_OK != database_setup (&plugin))
698 {
699 database_shutdown (&plugin);
700 return NULL;
701 }
702 api = GNUNET_new (struct GNUNET_RECLAIM_PluginFunctions);
703 api->cls = &plugin;
704 api->store_ticket = &reclaim_sqlite_store_ticket;
705 api->delete_ticket = &reclaim_sqlite_delete_ticket;
706 api->iterate_tickets = &reclaim_sqlite_iterate_tickets;
707 api->get_ticket_attributes = &reclaim_sqlite_ticket_get_attrs;
708 LOG (GNUNET_ERROR_TYPE_INFO,
709 _("Sqlite database running\n"));
710 return api;
711}
712
713
714/**
715 * Exit point from the plugin.
716 *
717 * @param cls the plugin context (as returned by "init")
718 * @return always NULL
719 */
720void *
721libgnunet_plugin_reclaim_sqlite_done (void *cls)
722{
723 struct GNUNET_RECLAIM_PluginFunctions *api = cls;
724 struct Plugin *plugin = api->cls;
725
726 database_shutdown (plugin);
727 plugin->cfg = NULL;
728 GNUNET_free (api);
729 LOG (GNUNET_ERROR_TYPE_DEBUG,
730 "sqlite plugin is finished\n");
731 return NULL;
732}
733
734/* end of plugin_reclaim_sqlite.c */