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-rw-r--r--src/namestore/plugin_namestore_sqlite.c791
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diff --git a/src/namestore/plugin_namestore_sqlite.c b/src/namestore/plugin_namestore_sqlite.c
deleted file mode 100644
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--- a/src/namestore/plugin_namestore_sqlite.c
+++ /dev/null
@@ -1,791 +0,0 @@
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 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
21/**
22 * @file namestore/plugin_namestore_sqlite.c
23 * @brief sqlite-based namestore backend
24 * @author Christian Grothoff
25 */
26
27#include "platform.h"
28#include "gnunet_namestore_plugin.h"
29#include "gnunet_namestore_service.h"
30#include "gnunet_gnsrecord_lib.h"
31#include "gnunet_sq_lib.h"
32#include "namestore.h"
33#include <sqlite3.h>
34
35/**
36 * After how many ms "busy" should a DB operation fail for good? A
37 * low value makes sure that we are more responsive to requests
38 * (especially PUTs). A high value guarantees a higher success rate
39 * (SELECTs in iterate can take several seconds despite LIMIT=1).
40 *
41 * The default value of 1s should ensure that users do not experience
42 * huge latencies while at the same time allowing operations to
43 * succeed with reasonable probability.
44 */
45#define BUSY_TIMEOUT_MS 1000
46
47
48/**
49 * Log an error message at log-level 'level' that indicates
50 * a failure of the command 'cmd' on file 'filename'
51 * with the message given by strerror(errno).
52 */
53#define LOG_SQLITE(db, level, cmd) do { GNUNET_log_from (level, \
54 "namestore-sqlite", _ ( \
55 "`%s' failed at %s:%d with error: %s\n"), \
56 cmd, \
57 __FILE__, __LINE__, \
58 sqlite3_errmsg ( \
59 db->dbh)); \
60} while (0)
61
62#define LOG(kind, ...) GNUNET_log_from (kind, "namestore-sqlite", __VA_ARGS__)
63
64
65/**
66 * Context for all functions in this plugin.
67 */
68struct Plugin
69{
70 const struct GNUNET_CONFIGURATION_Handle *cfg;
71
72 /**
73 * Database filename.
74 */
75 char *fn;
76
77 /**
78 * Native SQLite database handle.
79 */
80 sqlite3 *dbh;
81
82 /**
83 * Precompiled SQL to store records.
84 */
85 sqlite3_stmt *store_records;
86
87 /**
88 * Precompiled SQL to deltete existing records.
89 */
90 sqlite3_stmt *delete_records;
91
92 /**
93 * Precompiled SQL for iterate records within a zone.
94 */
95 sqlite3_stmt *iterate_zone;
96
97 /**
98 * Precompiled SQL for iterate all records within all zones.
99 */
100 sqlite3_stmt *iterate_all_zones;
101
102 /**
103 * Precompiled SQL to for reverse lookup based on PKEY.
104 */
105 sqlite3_stmt *zone_to_name;
106
107 /**
108 * Precompiled SQL to lookup records based on label.
109 */
110 sqlite3_stmt *lookup_label;
111};
112
113
114/**
115 * Initialize the database connections and associated
116 * data structures (create tables and indices
117 * as needed as well).
118 *
119 * @param plugin the plugin context (state for this module)
120 * @return #GNUNET_OK on success
121 */
122static int
123database_setup (struct Plugin *plugin)
124{
125 char *sqlite_filename;
126 struct GNUNET_SQ_ExecuteStatement es[] = {
127 GNUNET_SQ_make_try_execute ("PRAGMA temp_store=MEMORY"),
128 GNUNET_SQ_make_try_execute ("PRAGMA synchronous=NORMAL"),
129 GNUNET_SQ_make_try_execute ("PRAGMA legacy_file_format=OFF"),
130 GNUNET_SQ_make_try_execute ("PRAGMA auto_vacuum=INCREMENTAL"),
131 GNUNET_SQ_make_try_execute ("PRAGMA encoding=\"UTF-8\""),
132 GNUNET_SQ_make_try_execute ("PRAGMA locking_mode=EXCLUSIVE"),
133 GNUNET_SQ_make_try_execute ("PRAGMA journal_mode=WAL"),
134 GNUNET_SQ_make_try_execute ("PRAGMA page_size=4092"),
135 GNUNET_SQ_make_execute ("CREATE TABLE IF NOT EXISTS ns098records ("
136 " uid INTEGER PRIMARY KEY,"
137 " zone_private_key BLOB NOT NULL,"
138 " pkey BLOB,"
139 " rvalue INT8 NOT NULL,"
140 " record_count INT NOT NULL,"
141 " record_data BLOB NOT NULL,"
142 " label TEXT NOT NULL"
143 ")"),
144 GNUNET_SQ_make_try_execute ("CREATE INDEX IF NOT EXISTS ir_pkey_reverse "
145 "ON ns098records (zone_private_key,pkey)"),
146 GNUNET_SQ_make_try_execute ("CREATE INDEX IF NOT EXISTS ir_pkey_iter "
147 "ON ns098records (zone_private_key,uid)"),
148 GNUNET_SQ_EXECUTE_STATEMENT_END
149 };
150 struct GNUNET_SQ_PrepareStatement ps[] = {
151 GNUNET_SQ_make_prepare ("INSERT INTO ns098records "
152 "(zone_private_key,pkey,rvalue,record_count,record_data,label)"
153 " VALUES (?, ?, ?, ?, ?, ?)",
154 &plugin->store_records),
155 GNUNET_SQ_make_prepare ("DELETE FROM ns098records "
156 "WHERE zone_private_key=? AND label=?",
157 &plugin->delete_records),
158 GNUNET_SQ_make_prepare ("SELECT uid,record_count,record_data,label"
159 " FROM ns098records"
160 " WHERE zone_private_key=? AND pkey=?",
161 &plugin->zone_to_name),
162 GNUNET_SQ_make_prepare ("SELECT uid,record_count,record_data,label"
163 " FROM ns098records"
164 " WHERE zone_private_key=? AND uid > ?"
165 " ORDER BY uid ASC"
166 " LIMIT ?",
167 &plugin->iterate_zone),
168 GNUNET_SQ_make_prepare (
169 "SELECT uid,record_count,record_data,label,zone_private_key"
170 " FROM ns098records"
171 " WHERE uid > ?"
172 " ORDER BY uid ASC"
173 " LIMIT ?",
174 &plugin->iterate_all_zones),
175 GNUNET_SQ_make_prepare ("SELECT uid,record_count,record_data,label"
176 " FROM ns098records"
177 " WHERE zone_private_key=? AND label=?",
178 &plugin->lookup_label),
179 GNUNET_SQ_PREPARE_END
180 };
181
182 if (GNUNET_OK !=
183 GNUNET_CONFIGURATION_get_value_filename (plugin->cfg,
184 "namestore-sqlite",
185 "FILENAME",
186 &sqlite_filename))
187 {
188 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
189 "namestore-sqlite",
190 "FILENAME");
191 return GNUNET_SYSERR;
192 }
193 if (GNUNET_OK !=
194 GNUNET_DISK_file_test (sqlite_filename))
195 {
196 if (GNUNET_OK !=
197 GNUNET_DISK_directory_create_for_file (sqlite_filename))
198 {
199 GNUNET_break (0);
200 GNUNET_free (sqlite_filename);
201 return GNUNET_SYSERR;
202 }
203 }
204 /* sqlite_filename should be UTF-8-encoded. If it isn't, it's a bug */
205 plugin->fn = sqlite_filename;
206
207 /* Open database and precompile statements */
208 if (SQLITE_OK !=
209 sqlite3_open (plugin->fn,
210 &plugin->dbh))
211 {
212 LOG (GNUNET_ERROR_TYPE_ERROR,
213 _ ("Unable to initialize SQLite: %s.\n"),
214 sqlite3_errmsg (plugin->dbh));
215 return GNUNET_SYSERR;
216 }
217 GNUNET_break (SQLITE_OK ==
218 sqlite3_busy_timeout (plugin->dbh,
219 BUSY_TIMEOUT_MS));
220 if (GNUNET_OK !=
221 GNUNET_SQ_exec_statements (plugin->dbh,
222 es))
223 {
224 GNUNET_break (0);
225 LOG (GNUNET_ERROR_TYPE_ERROR,
226 _ ("Failed to setup database at `%s'\n"),
227 plugin->fn);
228 return GNUNET_SYSERR;
229 }
230
231 if (GNUNET_OK !=
232 GNUNET_SQ_prepare (plugin->dbh,
233 ps))
234 {
235 GNUNET_break (0);
236 LOG (GNUNET_ERROR_TYPE_ERROR,
237 _ ("Failed to setup database at `%s'\n"),
238 plugin->fn);
239 return GNUNET_SYSERR;
240 }
241 return GNUNET_OK;
242}
243
244
245/**
246 * Shutdown database connection and associate data
247 * structures.
248 * @param plugin the plugin context (state for this module)
249 */
250static void
251database_shutdown (struct Plugin *plugin)
252{
253 int result;
254 sqlite3_stmt *stmt;
255
256 if (NULL != plugin->store_records)
257 sqlite3_finalize (plugin->store_records);
258 if (NULL != plugin->delete_records)
259 sqlite3_finalize (plugin->delete_records);
260 if (NULL != plugin->iterate_zone)
261 sqlite3_finalize (plugin->iterate_zone);
262 if (NULL != plugin->iterate_all_zones)
263 sqlite3_finalize (plugin->iterate_all_zones);
264 if (NULL != plugin->zone_to_name)
265 sqlite3_finalize (plugin->zone_to_name);
266 if (NULL != plugin->lookup_label)
267 sqlite3_finalize (plugin->lookup_label);
268 result = sqlite3_close (plugin->dbh);
269 if (result == SQLITE_BUSY)
270 {
271 LOG (GNUNET_ERROR_TYPE_WARNING,
272 _ (
273 "Tried to close sqlite without finalizing all prepared statements.\n"));
274 stmt = sqlite3_next_stmt (plugin->dbh,
275 NULL);
276 while (NULL != stmt)
277 {
278 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
279 "sqlite",
280 "Closing statement %p\n",
281 stmt);
282 result = sqlite3_finalize (stmt);
283 if (result != SQLITE_OK)
284 GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
285 "sqlite",
286 "Failed to close statement %p: %d\n",
287 stmt,
288 result);
289 stmt = sqlite3_next_stmt (plugin->dbh,
290 NULL);
291 }
292 result = sqlite3_close (plugin->dbh);
293 }
294 if (SQLITE_OK != result)
295 LOG_SQLITE (plugin,
296 GNUNET_ERROR_TYPE_ERROR,
297 "sqlite3_close");
298
299 GNUNET_free (plugin->fn);
300}
301
302
303/**
304 * Store a record in the datastore. Removes any existing record in the
305 * same zone with the same name.
306 *
307 * @param cls closure (internal context for the plugin)
308 * @param zone_key private key of the zone
309 * @param label name that is being mapped (at most 255 characters long)
310 * @param rd_count number of entries in @a rd array
311 * @param rd array of records with data to store
312 * @return #GNUNET_OK on success, else #GNUNET_SYSERR
313 */
314static int
315namestore_sqlite_store_records (void *cls,
316 const struct
317 GNUNET_IDENTITY_PrivateKey *zone_key,
318 const char *label,
319 unsigned int rd_count,
320 const struct GNUNET_GNSRECORD_Data *rd)
321{
322 struct Plugin *plugin = cls;
323 int n;
324 struct GNUNET_IDENTITY_PublicKey pkey;
325 uint64_t rvalue;
326 ssize_t data_size;
327
328 memset (&pkey,
329 0,
330 sizeof(pkey));
331 for (unsigned int i = 0; i < rd_count; i++)
332 if (GNUNET_YES == GNUNET_GNSRECORD_is_zonekey_type (rd[i].record_type))
333 {
334 GNUNET_break (GNUNET_YES ==
335 GNUNET_GNSRECORD_identity_from_data (rd[i].data,
336 rd[i].data_size,
337 rd[i].record_type,
338 &pkey));
339 break;
340 }
341 rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
342 UINT64_MAX);
343 data_size = GNUNET_GNSRECORD_records_get_size (rd_count,
344 rd);
345 if (data_size < 0)
346 {
347 GNUNET_break (0);
348 return GNUNET_SYSERR;
349 }
350 if (data_size > 64 * 65536)
351 {
352 GNUNET_break (0);
353 return GNUNET_SYSERR;
354 }
355 {
356 /* First delete 'old' records */
357 char data[data_size];
358 struct GNUNET_SQ_QueryParam dparams[] = {
359 GNUNET_SQ_query_param_auto_from_type (zone_key),
360 GNUNET_SQ_query_param_string (label),
361 GNUNET_SQ_query_param_end
362 };
363 ssize_t ret;
364
365 ret = GNUNET_GNSRECORD_records_serialize (rd_count,
366 rd,
367 data_size,
368 data);
369 if ((ret < 0) ||
370 (data_size != ret))
371 {
372 GNUNET_break (0);
373 return GNUNET_SYSERR;
374 }
375 if (GNUNET_OK !=
376 GNUNET_SQ_bind (plugin->delete_records,
377 dparams))
378 {
379 LOG_SQLITE (plugin,
380 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
381 "sqlite3_bind_XXXX");
382 GNUNET_SQ_reset (plugin->dbh,
383 plugin->delete_records);
384 return GNUNET_SYSERR;
385 }
386 n = sqlite3_step (plugin->delete_records);
387 GNUNET_SQ_reset (plugin->dbh,
388 plugin->delete_records);
389
390 if (0 != rd_count)
391 {
392 uint32_t rd_count32 = (uint32_t) rd_count;
393 struct GNUNET_SQ_QueryParam sparams[] = {
394 GNUNET_SQ_query_param_auto_from_type (zone_key),
395 GNUNET_SQ_query_param_auto_from_type (&pkey),
396 GNUNET_SQ_query_param_uint64 (&rvalue),
397 GNUNET_SQ_query_param_uint32 (&rd_count32),
398 GNUNET_SQ_query_param_fixed_size (data, data_size),
399 GNUNET_SQ_query_param_string (label),
400 GNUNET_SQ_query_param_end
401 };
402
403 if (GNUNET_OK !=
404 GNUNET_SQ_bind (plugin->store_records,
405 sparams))
406 {
407 LOG_SQLITE (plugin,
408 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
409 "sqlite3_bind_XXXX");
410 GNUNET_SQ_reset (plugin->dbh,
411 plugin->store_records);
412 return GNUNET_SYSERR;
413 }
414 n = sqlite3_step (plugin->store_records);
415 GNUNET_SQ_reset (plugin->dbh,
416 plugin->store_records);
417 }
418 }
419 switch (n)
420 {
421 case SQLITE_DONE:
422 if (0 != rd_count)
423 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
424 "sqlite",
425 "Record stored\n");
426 else
427 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
428 "sqlite",
429 "Record deleted\n");
430 return GNUNET_OK;
431
432 case SQLITE_BUSY:
433 LOG_SQLITE (plugin,
434 GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
435 "sqlite3_step");
436 return GNUNET_NO;
437
438 default:
439 LOG_SQLITE (plugin,
440 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
441 "sqlite3_step");
442 return GNUNET_SYSERR;
443 }
444}
445
446
447/**
448 * The given 'sqlite' statement has been prepared to be run.
449 * It will return a record which should be given to the iterator.
450 * Runs the statement and parses the returned record.
451 *
452 * @param plugin plugin context
453 * @param stmt to run (and then clean up)
454 * @param zone_key private key of the zone
455 * @param limit maximum number of results to fetch
456 * @param iter iterator to call with the result
457 * @param iter_cls closure for @a iter
458 * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error
459 */
460static int
461get_records_and_call_iterator (struct Plugin *plugin,
462 sqlite3_stmt *stmt,
463 const struct
464 GNUNET_IDENTITY_PrivateKey *zone_key,
465 uint64_t limit,
466 GNUNET_NAMESTORE_RecordIterator iter,
467 void *iter_cls)
468{
469 int ret;
470 int sret;
471
472 ret = GNUNET_OK;
473 for (uint64_t i = 0; i < limit; i++)
474 {
475 sret = sqlite3_step (stmt);
476
477 if (SQLITE_DONE == sret)
478 {
479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
480 "Iteration done (no results)\n");
481 ret = GNUNET_NO;
482 break;
483 }
484 if (SQLITE_ROW != sret)
485 {
486 LOG_SQLITE (plugin,
487 GNUNET_ERROR_TYPE_ERROR,
488 "sqlite_step");
489 ret = GNUNET_SYSERR;
490 break;
491 }
492
493 {
494 uint64_t seq;
495 uint32_t record_count;
496 size_t data_size;
497 void *data;
498 char *label;
499 struct GNUNET_IDENTITY_PrivateKey zk;
500 struct GNUNET_SQ_ResultSpec rs[] = {
501 GNUNET_SQ_result_spec_uint64 (&seq),
502 GNUNET_SQ_result_spec_uint32 (&record_count),
503 GNUNET_SQ_result_spec_variable_size (&data,
504 &data_size),
505 GNUNET_SQ_result_spec_string (&label),
506 GNUNET_SQ_result_spec_end
507 };
508 struct GNUNET_SQ_ResultSpec rsx[] = {
509 GNUNET_SQ_result_spec_uint64 (&seq),
510 GNUNET_SQ_result_spec_uint32 (&record_count),
511 GNUNET_SQ_result_spec_variable_size (&data,
512 &data_size),
513 GNUNET_SQ_result_spec_string (&label),
514 GNUNET_SQ_result_spec_auto_from_type (&zk),
515 GNUNET_SQ_result_spec_end
516 };
517
518 ret = GNUNET_SQ_extract_result (stmt,
519 (NULL == zone_key)
520 ? rsx
521 : rs);
522 if ((GNUNET_OK != ret) ||
523 (record_count > 64 * 1024))
524 {
525 /* sanity check, don't stack allocate far too much just
526 because database might contain a large value here */
527 GNUNET_break (0);
528 ret = GNUNET_SYSERR;
529 break;
530 }
531 else
532 {
533 struct GNUNET_GNSRECORD_Data rd[record_count];
534
535 GNUNET_assert (0 != seq);
536 if (GNUNET_OK !=
537 GNUNET_GNSRECORD_records_deserialize (data_size,
538 data,
539 record_count,
540 rd))
541 {
542 GNUNET_break (0);
543 ret = GNUNET_SYSERR;
544 break;
545 }
546 else
547 {
548 if (NULL != zone_key)
549 zk = *zone_key;
550 if (NULL != iter)
551 iter (iter_cls,
552 seq,
553 &zk,
554 label,
555 record_count,
556 rd);
557 }
558 }
559 GNUNET_SQ_cleanup_result (rs);
560 }
561 }
562 GNUNET_SQ_reset (plugin->dbh,
563 stmt);
564 return ret;
565}
566
567
568/**
569 * Lookup records in the datastore for which we are the authority.
570 *
571 * @param cls closure (internal context for the plugin)
572 * @param zone private key of the zone
573 * @param label name of the record in the zone
574 * @param iter function to call with the result
575 * @param iter_cls closure for @a iter
576 * @return #GNUNET_OK on success, #GNUNET_NO for no results, else #GNUNET_SYSERR
577 */
578static int
579namestore_sqlite_lookup_records (void *cls,
580 const struct
581 GNUNET_IDENTITY_PrivateKey *zone,
582 const char *label,
583 GNUNET_NAMESTORE_RecordIterator iter,
584 void *iter_cls)
585{
586 struct Plugin *plugin = cls;
587 struct GNUNET_SQ_QueryParam params[] = {
588 GNUNET_SQ_query_param_auto_from_type (zone),
589 GNUNET_SQ_query_param_string (label),
590 GNUNET_SQ_query_param_end
591 };
592
593 if (NULL == zone)
594 {
595 GNUNET_break (0);
596 return GNUNET_SYSERR;
597 }
598 if (GNUNET_OK !=
599 GNUNET_SQ_bind (plugin->lookup_label,
600 params))
601 {
602 LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
603 "sqlite3_bind_XXXX");
604 GNUNET_SQ_reset (plugin->dbh,
605 plugin->lookup_label);
606 return GNUNET_SYSERR;
607 }
608 return get_records_and_call_iterator (plugin,
609 plugin->lookup_label,
610 zone,
611 1,
612 iter,
613 iter_cls);
614}
615
616
617/**
618 * Iterate over the results for a particular key and zone in the
619 * datastore. Will return at most one result to the iterator.
620 *
621 * @param cls closure (internal context for the plugin)
622 * @param zone hash of public key of the zone, NULL to iterate over all zones
623 * @param serial serial number to exclude in the list of all matching records
624 * @param limit maximum number of results to return
625 * @param iter function to call with the result
626 * @param iter_cls closure for @a iter
627 * @return #GNUNET_OK on success, #GNUNET_NO if there were no more results, #GNUNET_SYSERR on error
628 */
629static int
630namestore_sqlite_iterate_records (void *cls,
631 const struct
632 GNUNET_IDENTITY_PrivateKey *zone,
633 uint64_t serial,
634 uint64_t limit,
635 GNUNET_NAMESTORE_RecordIterator iter,
636 void *iter_cls)
637{
638 struct Plugin *plugin = cls;
639 sqlite3_stmt *stmt;
640 int err;
641
642 if (NULL == zone)
643 {
644 struct GNUNET_SQ_QueryParam params[] = {
645 GNUNET_SQ_query_param_uint64 (&serial),
646 GNUNET_SQ_query_param_uint64 (&limit),
647 GNUNET_SQ_query_param_end
648 };
649
650 stmt = plugin->iterate_all_zones;
651 err = GNUNET_SQ_bind (stmt,
652 params);
653 }
654 else
655 {
656 struct GNUNET_SQ_QueryParam params[] = {
657 GNUNET_SQ_query_param_auto_from_type (zone),
658 GNUNET_SQ_query_param_uint64 (&serial),
659 GNUNET_SQ_query_param_uint64 (&limit),
660 GNUNET_SQ_query_param_end
661 };
662
663 stmt = plugin->iterate_zone;
664 err = GNUNET_SQ_bind (stmt,
665 params);
666 }
667 if (GNUNET_OK != err)
668 {
669 LOG_SQLITE (plugin,
670 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
671 "sqlite3_bind_XXXX");
672 GNUNET_SQ_reset (plugin->dbh,
673 stmt);
674 return GNUNET_SYSERR;
675 }
676 return get_records_and_call_iterator (plugin,
677 stmt,
678 zone,
679 limit,
680 iter,
681 iter_cls);
682}
683
684
685/**
686 * Look for an existing PKEY delegation record for a given public key.
687 * Returns at most one result to the iterator.
688 *
689 * @param cls closure (internal context for the plugin)
690 * @param zone private key of the zone to look up in, never NULL
691 * @param value_zone public key of the target zone (value), never NULL
692 * @param iter function to call with the result
693 * @param iter_cls closure for @a iter
694 * @return #GNUNET_OK on success, #GNUNET_NO if there were no results, #GNUNET_SYSERR on error
695 */
696static int
697namestore_sqlite_zone_to_name (void *cls,
698 const struct GNUNET_IDENTITY_PrivateKey *zone,
699 const struct
700 GNUNET_IDENTITY_PublicKey *value_zone,
701 GNUNET_NAMESTORE_RecordIterator iter,
702 void *iter_cls)
703{
704 struct Plugin *plugin = cls;
705 struct GNUNET_SQ_QueryParam params[] = {
706 GNUNET_SQ_query_param_auto_from_type (zone),
707 GNUNET_SQ_query_param_auto_from_type (value_zone),
708 GNUNET_SQ_query_param_end
709 };
710
711 if (GNUNET_OK !=
712 GNUNET_SQ_bind (plugin->zone_to_name,
713 params))
714 {
715 LOG_SQLITE (plugin,
716 GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
717 "sqlite3_bind_XXXX");
718 GNUNET_SQ_reset (plugin->dbh,
719 plugin->zone_to_name);
720 return GNUNET_SYSERR;
721 }
722 LOG (GNUNET_ERROR_TYPE_DEBUG,
723 "Performing reverse lookup for `%s'\n",
724 GNUNET_GNSRECORD_z2s (value_zone));
725 return get_records_and_call_iterator (plugin,
726 plugin->zone_to_name,
727 zone,
728 1,
729 iter,
730 iter_cls);
731}
732
733
734/**
735 * Entry point for the plugin.
736 *
737 * @param cls the "struct GNUNET_NAMESTORE_PluginEnvironment*"
738 * @return NULL on error, otherwise the plugin context
739 */
740void *
741libgnunet_plugin_namestore_sqlite_init (void *cls)
742{
743 static struct Plugin plugin;
744 const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
745 struct GNUNET_NAMESTORE_PluginFunctions *api;
746
747 if (NULL != plugin.cfg)
748 return NULL; /* can only initialize once! */
749 memset (&plugin,
750 0,
751 sizeof(struct Plugin));
752 plugin.cfg = cfg;
753 if (GNUNET_OK != database_setup (&plugin))
754 {
755 database_shutdown (&plugin);
756 return NULL;
757 }
758 api = GNUNET_new (struct GNUNET_NAMESTORE_PluginFunctions);
759 api->cls = &plugin;
760 api->store_records = &namestore_sqlite_store_records;
761 api->iterate_records = &namestore_sqlite_iterate_records;
762 api->zone_to_name = &namestore_sqlite_zone_to_name;
763 api->lookup_records = &namestore_sqlite_lookup_records;
764 LOG (GNUNET_ERROR_TYPE_INFO,
765 _ ("Sqlite database running\n"));
766 return api;
767}
768
769
770/**
771 * Exit point from the plugin.
772 *
773 * @param cls the plugin context (as returned by "init")
774 * @return always NULL
775 */
776void *
777libgnunet_plugin_namestore_sqlite_done (void *cls)
778{
779 struct GNUNET_NAMESTORE_PluginFunctions *api = cls;
780 struct Plugin *plugin = api->cls;
781
782 database_shutdown (plugin);
783 plugin->cfg = NULL;
784 GNUNET_free (api);
785 LOG (GNUNET_ERROR_TYPE_DEBUG,
786 "sqlite plugin is finished\n");
787 return NULL;
788}
789
790
791/* end of plugin_namestore_sqlite.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 12:00:57 +0000