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docs: ldb.3.xml: Correct meta data.
[Samba.git] / lib / ldb / ldb_sqlite3 / ldb_sqlite3.c
blob223868a6c0ad23d588d3a8fb08707b0305467888
1 /*
2 ldb database library
3
4 Copyright (C) Derrell Lipman 2005
5 Copyright (C) Simo Sorce 2005-2009
6
7 ** NOTE! The following LGPL license applies to the ldb
8 ** library. This does NOT imply that all of Samba is released
9 ** under the LGPL
10
11 This library is free software; you can redistribute it and/or
12 modify it under the terms of the GNU Lesser General Public
13 License as published by the Free Software Foundation; either
14 version 3 of the License, or (at your option) any later version.
15
16 This library is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
20
21 You should have received a copy of the GNU Lesser General Public
22 License along with this library; if not, see <http://www.gnu.org/licenses/>.
23 */
24
25 /*
26 * Name: ldb
27 *
28 * Component: ldb sqlite3 backend
29 *
30 * Description: core files for SQLITE3 backend
31 *
32 * Author: Derrell Lipman (based on Andrew Tridgell's LDAP backend)
33 */
34
35 #include "ldb_module.h"
36
37 #include <sqlite3.h>
38
39 struct lsqlite3_private {
40 int trans_count;
41 char **options;
42 sqlite3 *sqlite;
43 };
44
45 struct lsql_context {
46 struct ldb_module *module;
47 struct ldb_request *req;
48
49 /* search stuff */
50 long long current_eid;
51 const char * const * attrs;
52 struct ldb_reply *ares;
53
54 bool callback_failed;
55 struct tevent_timer *timeout_event;
56 };
57
58 /*
59 * Macros used throughout
60 */
61
62 #ifndef FALSE
63 # define FALSE (0)
64 # define TRUE (! FALSE)
65 #endif
66
67 #define RESULT_ATTR_TABLE "temp_result_attrs"
68
69
70 /* for testing, define to nothing, (create non-temporary table) */
71 #define TEMPTAB "TEMPORARY"
72
73 /*
74 * Static variables
75 */
76 sqlite3_stmt * stmtGetEID = NULL;
77
78 static char *lsqlite3_tprintf(TALLOC_CTX *mem_ctx, const char *fmt, ...)
79 {
80 char *str, *ret;
81 va_list ap;
82
83 va_start(ap, fmt);
84 str = sqlite3_vmprintf(fmt, ap);
85 va_end(ap);
86
87 if (str == NULL) return NULL;
88
89 ret = talloc_strdup(mem_ctx, str);
90 if (ret == NULL) {
91 sqlite3_free(str);
92 return NULL;
93 }
94
95 sqlite3_free(str);
96 return ret;
97 }
98
99 static char base160tab[161] = {
100 48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 , /* 0-9 */
101 58 ,59 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 , /* : ; A-H */
102 73 ,74 ,75 ,76 ,77 ,78 ,79 ,80 ,81 ,82 , /* I-R */
103 83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,97 ,98 , /* S-Z , a-b */
104 99 ,100,101,102,103,104,105,106,107,108, /* c-l */
105 109,110,111,112,113,114,115,116,117,118, /* m-v */
106 119,120,121,122,160,161,162,163,164,165, /* w-z, latin1 */
107 166,167,168,169,170,171,172,173,174,175, /* latin1 */
108 176,177,178,179,180,181,182,183,184,185, /* latin1 */
109 186,187,188,189,190,191,192,193,194,195, /* latin1 */
110 196,197,198,199,200,201,202,203,204,205, /* latin1 */
111 206,207,208,209,210,211,212,213,214,215, /* latin1 */
112 216,217,218,219,220,221,222,223,224,225, /* latin1 */
113 226,227,228,229,230,231,232,233,234,235, /* latin1 */
114 236,237,238,239,240,241,242,243,244,245, /* latin1 */
115 246,247,248,249,250,251,252,253,254,255, /* latin1 */
116 '\0'
117 };
118
119
120 /*
121 * base160()
122 *
123 * Convert an unsigned long integer into a base160 representation of the
124 * number.
125 *
126 * Parameters:
127 * val --
128 * value to be converted
129 *
130 * result --
131 * character array, 5 bytes long, into which the base160 representation
132 * will be placed. The result will be a four-digit representation of the
133 * number (with leading zeros prepended as necessary), and null
134 * terminated.
135 *
136 * Returns:
137 * Nothing
138 */
139 static void
140 base160_sql(sqlite3_context * hContext,
141 int argc,
142 sqlite3_value ** argv)
143 {
144 int i;
145 long long val;
146 char result[5];
147
148 val = sqlite3_value_int64(argv[0]);
149
150 for (i = 3; i >= 0; i--) {
151
152 result[i] = base160tab[val % 160];
153 val /= 160;
154 }
155
156 result[4] = '\0';
157
158 sqlite3_result_text(hContext, result, -1, SQLITE_TRANSIENT);
159 }
160
161
162 /*
163 * base160next_sql()
164 *
165 * This function enhances sqlite by adding a "base160_next()" function which is
166 * accessible via queries.
167 *
168 * Retrieve the next-greater number in the base160 sequence for the terminal
169 * tree node (the last four digits). Only one tree level (four digits) is
170 * operated on.
171 *
172 * Input:
173 * A character string: either an empty string (in which case no operation is
174 * performed), or a string of base160 digits with a length of a multiple of
175 * four digits.
176 *
177 * Output:
178 * Upon return, the trailing four digits (one tree level) will have been
179 * incremented by 1.
180 */
181 static void
182 base160next_sql(sqlite3_context * hContext,
183 int argc,
184 sqlite3_value ** argv)
185 {
186 int i;
187 int len;
188 char * pTab;
189 char * pBase160 = strdup((const char *)sqlite3_value_text(argv[0]));
190 char * pStart = pBase160;
191
192 /*
193 * We need a minimum of four digits, and we will always get a multiple
194 * of four digits.
195 */
196 if (pBase160 != NULL &&
197 (len = strlen(pBase160)) >= 4 &&
198 len % 4 == 0) {
199
200 if (pBase160 == NULL) {
201
202 sqlite3_result_null(hContext);
203 return;
204 }
205
206 pBase160 += strlen(pBase160) - 1;
207
208 /* We only carry through four digits: one level in the tree */
209 for (i = 0; i < 4; i++) {
210
211 /* What base160 value does this digit have? */
212 pTab = strchr(base160tab, *pBase160);
213
214 /* Is there a carry? */
215 if (pTab < base160tab + sizeof(base160tab) - 1) {
216
217 /*
218 * Nope. Just increment this value and we're
219 * done.
220 */
221 *pBase160 = *++pTab;
222 break;
223 } else {
224
225 /*
226 * There's a carry. This value gets
227 * base160tab[0], we decrement the buffer
228 * pointer to get the next higher-order digit,
229 * and continue in the loop.
230 */
231 *pBase160-- = base160tab[0];
232 }
233 }
234
235 sqlite3_result_text(hContext,
236 pStart,
237 strlen(pStart),
238 free);
239 } else {
240 sqlite3_result_value(hContext, argv[0]);
241 if (pBase160 != NULL) {
242 free(pBase160);
243 }
244 }
245 }
246
247 static char *parsetree_to_sql(struct ldb_module *module,
248 void *mem_ctx,
249 const struct ldb_parse_tree *t)
250 {
251 struct ldb_context *ldb;
252 const struct ldb_schema_attribute *a;
253 struct ldb_val value, subval;
254 char *wild_card_string;
255 char *child, *tmp;
256 char *ret = NULL;
257 char *attr;
258 unsigned int i;
259
260 ldb = ldb_module_get_ctx(module);
261
262 switch(t->operation) {
263 case LDB_OP_AND:
264
265 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
266 if (tmp == NULL) return NULL;
267
268 for (i = 1; i < t->u.list.num_elements; i++) {
269
270 child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
271 if (child == NULL) return NULL;
272
273 tmp = talloc_asprintf_append(tmp, " INTERSECT %s ", child);
274 if (tmp == NULL) return NULL;
275 }
276
277 ret = talloc_asprintf(mem_ctx, "SELECT * FROM ( %s )\n", tmp);
278
279 return ret;
280
281 case LDB_OP_OR:
282
283 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
284 if (tmp == NULL) return NULL;
285
286 for (i = 1; i < t->u.list.num_elements; i++) {
287
288 child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
289 if (child == NULL) return NULL;
290
291 tmp = talloc_asprintf_append(tmp, " UNION %s ", child);
292 if (tmp == NULL) return NULL;
293 }
294
295 return talloc_asprintf(mem_ctx, "SELECT * FROM ( %s ) ", tmp);
296
297 case LDB_OP_NOT:
298
299 child = parsetree_to_sql(module, mem_ctx, t->u.isnot.child);
300 if (child == NULL) return NULL;
301
302 return talloc_asprintf(mem_ctx,
303 "SELECT eid FROM ldb_entry "
304 "WHERE eid NOT IN ( %s ) ", child);
305
306 case LDB_OP_EQUALITY:
307 /*
308 * For simple searches, we want to retrieve the list of EIDs that
309 * match the criteria.
310 */
311 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
312 if (attr == NULL) return NULL;
313 a = ldb_schema_attribute_by_name(ldb, attr);
314
315 /* Get a canonicalised copy of the data */
316 a->syntax->canonicalise_fn(ldb, mem_ctx, &(t->u.equality.value), &value);
317 if (value.data == NULL) {
318 return NULL;
319 }
320
321 if (strcasecmp(t->u.equality.attr, "dn") == 0) {
322 /* DN query is a special ldb case */
323 const char *cdn = ldb_dn_get_casefold(
324 ldb_dn_new(mem_ctx, ldb,
325 (const char *)value.data));
326
327 return lsqlite3_tprintf(mem_ctx,
328 "SELECT eid FROM ldb_entry "
329 "WHERE norm_dn = '%q'", cdn);
330
331 } else {
332 /* A normal query. */
333 return lsqlite3_tprintf(mem_ctx,
334 "SELECT eid FROM ldb_attribute_values "
335 "WHERE norm_attr_name = '%q' "
336 "AND norm_attr_value = '%q'",
337 attr,
338 value.data);
339
340 }
341
342 case LDB_OP_SUBSTRING:
343
344 wild_card_string = talloc_strdup(mem_ctx,
345 (t->u.substring.start_with_wildcard)?"*":"");
346 if (wild_card_string == NULL) return NULL;
347
348 for (i = 0; t->u.substring.chunks[i]; i++) {
349 wild_card_string = talloc_asprintf_append(wild_card_string, "%s*",
350 t->u.substring.chunks[i]->data);
351 if (wild_card_string == NULL) return NULL;
352 }
353
354 if ( ! t->u.substring.end_with_wildcard ) {
355 /* remove last wildcard */
356 wild_card_string[strlen(wild_card_string) - 1] = '\0';
357 }
358
359 attr = ldb_attr_casefold(mem_ctx, t->u.substring.attr);
360 if (attr == NULL) return NULL;
361 a = ldb_schema_attribute_by_name(ldb, attr);
362
363 subval.data = (void *)wild_card_string;
364 subval.length = strlen(wild_card_string) + 1;
365
366 /* Get a canonicalised copy of the data */
367 a->syntax->canonicalise_fn(ldb, mem_ctx, &(subval), &value);
368 if (value.data == NULL) {
369 return NULL;
370 }
371
372 return lsqlite3_tprintf(mem_ctx,
373 "SELECT eid FROM ldb_attribute_values "
374 "WHERE norm_attr_name = '%q' "
375 "AND norm_attr_value GLOB '%q'",
376 attr,
377 value.data);
378
379 case LDB_OP_GREATER:
380 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
381 if (attr == NULL) return NULL;
382 a = ldb_schema_attribute_by_name(ldb, attr);
383
384 /* Get a canonicalised copy of the data */
385 a->syntax->canonicalise_fn(ldb, mem_ctx, &(t->u.equality.value), &value);
386 if (value.data == NULL) {
387 return NULL;
388 }
389
390 return lsqlite3_tprintf(mem_ctx,
391 "SELECT eid FROM ldb_attribute_values "
392 "WHERE norm_attr_name = '%q' "
393 "AND ldap_compare(norm_attr_value, '>=', '%q', '%q') ",
394 attr,
395 value.data,
396 attr);
397
398 case LDB_OP_LESS:
399 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
400 if (attr == NULL) return NULL;
401 a = ldb_schema_attribute_by_name(ldb, attr);
402
403 /* Get a canonicalised copy of the data */
404 a->syntax->canonicalise_fn(ldb, mem_ctx, &(t->u.equality.value), &value);
405 if (value.data == NULL) {
406 return NULL;
407 }
408
409 return lsqlite3_tprintf(mem_ctx,
410 "SELECT eid FROM ldb_attribute_values "
411 "WHERE norm_attr_name = '%q' "
412 "AND ldap_compare(norm_attr_value, '<=', '%q', '%q') ",
413 attr,
414 value.data,
415 attr);
416
417 case LDB_OP_PRESENT:
418 if (strcasecmp(t->u.present.attr, "dn") == 0) {
419 return talloc_strdup(mem_ctx, "SELECT eid FROM ldb_entry");
420 }
421
422 attr = ldb_attr_casefold(mem_ctx, t->u.present.attr);
423 if (attr == NULL) return NULL;
424
425 return lsqlite3_tprintf(mem_ctx,
426 "SELECT eid FROM ldb_attribute_values "
427 "WHERE norm_attr_name = '%q' ",
428 attr);
429
430 case LDB_OP_APPROX:
431 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
432 if (attr == NULL) return NULL;
433 a = ldb_schema_attribute_by_name(ldb, attr);
434
435 /* Get a canonicalised copy of the data */
436 a->syntax->canonicalise_fn(ldb, mem_ctx, &(t->u.equality.value), &value);
437 if (value.data == NULL) {
438 return NULL;
439 }
440
441 return lsqlite3_tprintf(mem_ctx,
442 "SELECT eid FROM ldb_attribute_values "
443 "WHERE norm_attr_name = '%q' "
444 "AND ldap_compare(norm_attr_value, '~%', 'q', '%q') ",
445 attr,
446 value.data,
447 attr);
448
449 case LDB_OP_EXTENDED:
450 #warning "work out how to handle bitops"
451 return NULL;
452
453 default:
454 break;
455 };
456
457 /* should never occur */
458 abort();
459 return NULL;
460 }
461
462 /*
463 * query_int()
464 *
465 * This function is used for the common case of queries that return a single
466 * integer value.
467 *
468 * NOTE: If more than one value is returned by the query, all but the first
469 * one will be ignored.
470 */
471 static int
472 query_int(const struct lsqlite3_private * lsqlite3,
473 long long * pRet,
474 const char * pSql,
475 ...)
476 {
477 int ret;
478 int bLoop;
479 char * p;
480 sqlite3_stmt * pStmt;
481 va_list args;
482
483 /* Begin access to variable argument list */
484 va_start(args, pSql);
485
486 /* Format the query */
487 if ((p = sqlite3_vmprintf(pSql, args)) == NULL) {
488 va_end(args);
489 return SQLITE_NOMEM;
490 }
491
492 /*
493 * Prepare and execute the SQL statement. Loop allows retrying on
494 * certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes,
495 * requiring retrying the operation.
496 */
497 for (bLoop = TRUE; bLoop; ) {
498
499 /* Compile the SQL statement into sqlite virtual machine */
500 if ((ret = sqlite3_prepare(lsqlite3->sqlite,
501 p,
502 -1,
503 &pStmt,
504 NULL)) == SQLITE_SCHEMA) {
505 if (stmtGetEID != NULL) {
506 sqlite3_finalize(stmtGetEID);
507 stmtGetEID = NULL;
508 }
509 continue;
510 } else if (ret != SQLITE_OK) {
511 break;
512 }
513
514 /* One row expected */
515 if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) {
516 if (stmtGetEID != NULL) {
517 sqlite3_finalize(stmtGetEID);
518 stmtGetEID = NULL;
519 }
520 (void) sqlite3_finalize(pStmt);
521 continue;
522 } else if (ret != SQLITE_ROW) {
523 (void) sqlite3_finalize(pStmt);
524 break;
525 }
526
527 /* Get the value to be returned */
528 *pRet = sqlite3_column_int64(pStmt, 0);
529
530 /* Free the virtual machine */
531 if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) {
532 if (stmtGetEID != NULL) {
533 sqlite3_finalize(stmtGetEID);
534 stmtGetEID = NULL;
535 }
536 continue;
537 } else if (ret != SQLITE_OK) {
538 (void) sqlite3_finalize(pStmt);
539 break;
540 }
541
542 /*
543 * Normal condition is only one time through loop. Loop is
544 * rerun in error conditions, via "continue", above.
545 */
546 bLoop = FALSE;
547 }
548
549 /* All done with variable argument list */
550 va_end(args);
551
552
553 /* Free the memory we allocated for our query string */
554 sqlite3_free(p);
555
556 return ret;
557 }
558
559 /*
560 * This is a bad hack to support ldap style comparisons within sqlite.
561 * val is the attribute in the row currently under test
562 * func is the desired test "<=" ">=" "~" ":"
563 * cmp is the value to compare against (eg: "test")
564 * attr is the attribute name the value of which we want to test
565 */
566
567 static void lsqlite3_compare(sqlite3_context *ctx, int argc,
568 sqlite3_value **argv)
569 {
570 struct ldb_context *ldb = (struct ldb_context *)sqlite3_user_data(ctx);
571 const char *val = (const char *)sqlite3_value_text(argv[0]);
572 const char *func = (const char *)sqlite3_value_text(argv[1]);
573 const char *cmp = (const char *)sqlite3_value_text(argv[2]);
574 const char *attr = (const char *)sqlite3_value_text(argv[3]);
575 const struct ldb_schema_attribute *a;
576 struct ldb_val valX;
577 struct ldb_val valY;
578 int ret;
579
580 switch (func[0]) {
581 /* greater */
582 case '>': /* >= */
583 a = ldb_schema_attribute_by_name(ldb, attr);
584 valX.data = (uint8_t *)cmp;
585 valX.length = strlen(cmp);
586 valY.data = (uint8_t *)val;
587 valY.length = strlen(val);
588 ret = a->syntax->comparison_fn(ldb, ldb, &valY, &valX);
589 if (ret >= 0)
590 sqlite3_result_int(ctx, 1);
591 else
592 sqlite3_result_int(ctx, 0);
593 return;
594
595 /* lesser */
596 case '<': /* <= */
597 a = ldb_schema_attribute_by_name(ldb, attr);
598 valX.data = (uint8_t *)cmp;
599 valX.length = strlen(cmp);
600 valY.data = (uint8_t *)val;
601 valY.length = strlen(val);
602 ret = a->syntax->comparison_fn(ldb, ldb, &valY, &valX);
603 if (ret <= 0)
604 sqlite3_result_int(ctx, 1);
605 else
606 sqlite3_result_int(ctx, 0);
607 return;
608
609 /* approx */
610 case '~':
611 /* TODO */
612 sqlite3_result_int(ctx, 0);
613 return;
614
615 /* bitops */
616 case ':':
617 /* TODO */
618 sqlite3_result_int(ctx, 0);
619 return;
620
621 default:
622 break;
623 }
624
625 sqlite3_result_error(ctx, "Value must start with a special operation char (<>~:)!", -1);
626 return;
627 }
628
629
630 /* rename a record */
631 static int lsqlite3_safe_rollback(sqlite3 *sqlite)
632 {
633 char *errmsg;
634 int ret;
635
636 /* execute */
637 ret = sqlite3_exec(sqlite, "ROLLBACK;", NULL, NULL, &errmsg);
638 if (ret != SQLITE_OK) {
639 if (errmsg) {
640 printf("lsqlite3_safe_rollback: Error: %s\n", errmsg);
641 free(errmsg);
642 }
643 return -1;
644 }
645
646 return 0;
647 }
648
649 /* return an eid as result */
650 static int lsqlite3_eid_callback(void *result, int col_num, char **cols, char **names)
651 {
652 long long *eid = (long long *)result;
653
654 if (col_num != 1) return SQLITE_ABORT;
655 if (strcasecmp(names[0], "eid") != 0) return SQLITE_ABORT;
656
657 *eid = atoll(cols[0]);
658 return SQLITE_OK;
659 }
660
661 /*
662 * add a single set of ldap message values to a ldb_message
663 */
664 static int lsqlite3_search_callback(void *result, int col_num, char **cols, char **names)
665 {
666 struct ldb_context *ldb;
667 struct lsql_context *ac;
668 struct ldb_message *msg;
669 long long eid;
670 unsigned int i;
671 int ret;
672
673 ac = talloc_get_type(result, struct lsql_context);
674 ldb = ldb_module_get_ctx(ac->module);
675
676 /* eid, dn, attr_name, attr_value */
677 if (col_num != 4) return SQLITE_ABORT;
678
679 eid = atoll(cols[0]);
680
681 if (ac->ares) {
682 msg = ac->ares->message;
683 }
684
685 if (eid != ac->current_eid) { /* here begin a new entry */
686
687 /* call the async callback for the last entry
688 * except the first time */
689 if (ac->current_eid != 0) {
690 ret = ldb_msg_normalize(ldb, ac->req, msg, &msg);
691 if (ret != LDB_SUCCESS) {
692 return SQLITE_ABORT;
693 }
694
695 ret = ldb_module_send_entry(ac->req, msg, NULL);
696 if (ret != LDB_SUCCESS) {
697 ac->callback_failed = true;
698 /* free msg object */
699 TALLOC_FREE(msg);
700 return SQLITE_ABORT;
701 }
702
703 /* free msg object */
704 TALLOC_FREE(msg);
705 }
706
707 /* start over */
708 ac->ares = talloc_zero(ac, struct ldb_reply);
709 if (!ac->ares) return SQLITE_ABORT;
710
711 msg = ldb_msg_new(ac->ares);
712 if (!msg) return SQLITE_ABORT;
713
714 ac->ares->type = LDB_REPLY_ENTRY;
715 ac->current_eid = eid;
716 }
717
718 if (msg->dn == NULL) {
719 msg->dn = ldb_dn_new(msg, ldb, cols[1]);
720 if (msg->dn == NULL)
721 return SQLITE_ABORT;
722 }
723
724 if (ac->attrs) {
725 int found = 0;
726 for (i = 0; ac->attrs[i]; i++) {
727 if (strcasecmp(cols[2], ac->attrs[i]) == 0) {
728 found = 1;
729 break;
730 }
731 }
732 if (!found) goto done;
733 }
734
735 if (ldb_msg_add_string(msg, cols[2], cols[3]) != 0) {
736 return SQLITE_ABORT;
737 }
738
739 done:
740 ac->ares->message = msg;
741 return SQLITE_OK;
742 }
743
744
745 /*
746 * lsqlite3_get_eid()
747 * lsqlite3_get_eid_ndn()
748 *
749 * These functions are used for the very common case of retrieving an EID value
750 * given a (normalized) DN.
751 */
752
753 static long long lsqlite3_get_eid_ndn(sqlite3 *sqlite, void *mem_ctx, const char *norm_dn)
754 {
755 char *errmsg;
756 char *query;
757 long long eid = -1;
758 long long ret;
759
760 /* get object eid */
761 query = lsqlite3_tprintf(mem_ctx, "SELECT eid "
762 "FROM ldb_entry "
763 "WHERE norm_dn = '%q';", norm_dn);
764 if (query == NULL) return -1;
765
766 ret = sqlite3_exec(sqlite, query, lsqlite3_eid_callback, &eid, &errmsg);
767 if (ret != SQLITE_OK) {
768 if (errmsg) {
769 printf("lsqlite3_get_eid: Fatal Error: %s\n", errmsg);
770 free(errmsg);
771 }
772 return -1;
773 }
774
775 return eid;
776 }
777
778 static long long lsqlite3_get_eid(struct lsqlite3_private *lsqlite3,
779 struct ldb_dn *dn)
780 {
781 TALLOC_CTX *local_ctx;
782 long long eid = -1;
783 char *cdn;
784
785 /* ignore ltdb specials */
786 if (ldb_dn_is_special(dn)) {
787 return -1;
788 }
789
790 /* create a local ctx */
791 local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_get_eid local context");
792 if (local_ctx == NULL) {
793 return -1;
794 }
795
796 cdn = ldb_dn_alloc_casefold(local_ctx, dn);
797 if (!cdn) goto done;
798
799 eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, local_ctx, cdn);
800
801 done:
802 talloc_free(local_ctx);
803 return eid;
804 }
805
806 /*
807 * Interface functions referenced by lsqlite3_ops
808 */
809
810 /* search for matching records, by tree */
811 int lsql_search(struct lsql_context *ctx)
812 {
813 struct ldb_module *module = ctx->module;
814 struct ldb_request *req = ctx->req;
815 struct lsqlite3_private *lsqlite3;
816 struct ldb_context *ldb;
817 char *norm_basedn;
818 char *sqlfilter;
819 char *errmsg;
820 char *query = NULL;
821 int ret;
822
823 ldb = ldb_module_get_ctx(module);
824 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
825 struct lsqlite3_private);
826
827 if ((( ! ldb_dn_is_valid(req->op.search.base)) ||
828 ldb_dn_is_null(req->op.search.base)) &&
829 (req->op.search.scope == LDB_SCOPE_BASE ||
830 req->op.search.scope == LDB_SCOPE_ONELEVEL)) {
831 return LDB_ERR_OPERATIONS_ERROR;
832 }
833
834 if (req->op.search.base) {
835 norm_basedn = ldb_dn_alloc_casefold(ctx, req->op.search.base);
836 if (norm_basedn == NULL) {
837 return LDB_ERR_OPERATIONS_ERROR;
838 }
839 } else norm_basedn = talloc_strdup(ctx, "");
840
841 /* Convert filter into a series of SQL conditions (constraints) */
842 sqlfilter = parsetree_to_sql(module, ctx, req->op.search.tree);
843
844 switch(req->op.search.scope) {
845 case LDB_SCOPE_DEFAULT:
846 case LDB_SCOPE_SUBTREE:
847 if (*norm_basedn != '\0') {
848 query = lsqlite3_tprintf(ctx,
849 "SELECT entry.eid,\n"
850 " entry.dn,\n"
851 " av.attr_name,\n"
852 " av.attr_value\n"
853 " FROM ldb_entry AS entry\n"
854
855 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
856 " ON av.eid = entry.eid\n"
857
858 " WHERE entry.eid IN\n"
859 " (SELECT DISTINCT ldb_entry.eid\n"
860 " FROM ldb_entry\n"
861 " WHERE (ldb_entry.norm_dn GLOB('*,%q')\n"
862 " OR ldb_entry.norm_dn = '%q')\n"
863 " AND ldb_entry.eid IN\n"
864 " (%s)\n"
865 " )\n"
866
867 " ORDER BY entry.eid ASC;",
868 norm_basedn,
869 norm_basedn,
870 sqlfilter);
871 } else {
872 query = lsqlite3_tprintf(ctx,
873 "SELECT entry.eid,\n"
874 " entry.dn,\n"
875 " av.attr_name,\n"
876 " av.attr_value\n"
877 " FROM ldb_entry AS entry\n"
878
879 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
880 " ON av.eid = entry.eid\n"
881
882 " WHERE entry.eid IN\n"
883 " (SELECT DISTINCT ldb_entry.eid\n"
884 " FROM ldb_entry\n"
885 " WHERE ldb_entry.eid IN\n"
886 " (%s)\n"
887 " )\n"
888
889 " ORDER BY entry.eid ASC;",
890 sqlfilter);
891 }
892
893 break;
894
895 case LDB_SCOPE_BASE:
896 query = lsqlite3_tprintf(ctx,
897 "SELECT entry.eid,\n"
898 " entry.dn,\n"
899 " av.attr_name,\n"
900 " av.attr_value\n"
901 " FROM ldb_entry AS entry\n"
902
903 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
904 " ON av.eid = entry.eid\n"
905
906 " WHERE entry.eid IN\n"
907 " (SELECT DISTINCT ldb_entry.eid\n"
908 " FROM ldb_entry\n"
909 " WHERE ldb_entry.norm_dn = '%q'\n"
910 " AND ldb_entry.eid IN\n"
911 " (%s)\n"
912 " )\n"
913
914 " ORDER BY entry.eid ASC;",
915 norm_basedn,
916 sqlfilter);
917 break;
918
919 case LDB_SCOPE_ONELEVEL:
920 query = lsqlite3_tprintf(ctx,
921 "SELECT entry.eid,\n"
922 " entry.dn,\n"
923 " av.attr_name,\n"
924 " av.attr_value\n"
925 " FROM ldb_entry AS entry\n"
926
927 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
928 " ON av.eid = entry.eid\n"
929
930 " WHERE entry.eid IN\n"
931 " (SELECT DISTINCT ldb_entry.eid\n"
932 " FROM ldb_entry\n"
933 " WHERE norm_dn GLOB('*,%q')\n"
934 " AND NOT norm_dn GLOB('*,*,%q')\n"
935 " AND ldb_entry.eid IN\n(%s)\n"
936 " )\n"
937
938 " ORDER BY entry.eid ASC;",
939 norm_basedn,
940 norm_basedn,
941 sqlfilter);
942 break;
943 }
944
945 if (query == NULL) {
946 return LDB_ERR_OPERATIONS_ERROR;
947 }
948
949 /* * /
950 printf ("%s\n", query);
951 / * */
952
953 ctx->current_eid = 0;
954 ctx->attrs = req->op.search.attrs;
955 ctx->ares = NULL;
956
957 ldb_request_set_state(req, LDB_ASYNC_PENDING);
958
959 ret = sqlite3_exec(lsqlite3->sqlite, query, lsqlite3_search_callback, ctx, &errmsg);
960 if (ret != SQLITE_OK) {
961 if (errmsg) {
962 ldb_set_errstring(ldb, errmsg);
963 free(errmsg);
964 }
965 return LDB_ERR_OPERATIONS_ERROR;
966 }
967
968 /* complete the last message if any */
969 if (ctx->ares) {
970 ret = ldb_msg_normalize(ldb, ctx->ares,
971 ctx->ares->message,
972 &ctx->ares->message);
973 if (ret != LDB_SUCCESS) {
974 return LDB_ERR_OPERATIONS_ERROR;
975 }
976
977 ret = ldb_module_send_entry(req, ctx->ares->message, NULL);
978 if (ret != LDB_SUCCESS) {
979 return ret;
980 }
981 }
982
983
984 return LDB_SUCCESS;
985 }
986
987 /* add a record */
988 static int lsql_add(struct lsql_context *ctx)
989 {
990 struct ldb_module *module = ctx->module;
991 struct ldb_request *req = ctx->req;
992 struct lsqlite3_private *lsqlite3;
993 struct ldb_context *ldb;
994 struct ldb_message *msg = req->op.add.message;
995 long long eid;
996 char *dn, *ndn;
997 char *errmsg;
998 char *query;
999 unsigned int i;
1000 int ret;
1001
1002 ldb = ldb_module_get_ctx(module);
1003 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1004 struct lsqlite3_private);
1005
1006 /* See if this is an ltdb special */
1007 if (ldb_dn_is_special(msg->dn)) {
1008 /*
1009 struct ldb_dn *c;
1010 c = ldb_dn_new(local_ctx, ldb, "@INDEXLIST");
1011 if (ldb_dn_compare(ldb, msg->dn, c) == 0) {
1012 #warning "should we handle indexes somehow ?"
1013 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1014 goto done;
1015 }
1016 */
1017 /* Others return an error */
1018 return LDB_ERR_UNWILLING_TO_PERFORM;
1019 }
1020
1021 /* create linearized and normalized dns */
1022 dn = ldb_dn_alloc_linearized(ctx, msg->dn);
1023 ndn = ldb_dn_alloc_casefold(ctx, msg->dn);
1024 if (dn == NULL || ndn == NULL) {
1025 return LDB_ERR_OPERATIONS_ERROR;
1026 }
1027
1028 query = lsqlite3_tprintf(ctx,
1029 /* Add new entry */
1030 "INSERT OR ABORT INTO ldb_entry "
1031 "('dn', 'norm_dn') "
1032 "VALUES ('%q', '%q');",
1033 dn, ndn);
1034 if (query == NULL) {
1035 return LDB_ERR_OPERATIONS_ERROR;
1036 }
1037
1038 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1039 if (ret != SQLITE_OK) {
1040 if (errmsg) {
1041 ldb_set_errstring(ldb, errmsg);
1042 free(errmsg);
1043 }
1044 return LDB_ERR_OPERATIONS_ERROR;
1045 }
1046
1047 eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, ctx, ndn);
1048 if (eid == -1) {
1049 return LDB_ERR_OPERATIONS_ERROR;
1050 }
1051
1052 for (i = 0; i < msg->num_elements; i++) {
1053 const struct ldb_message_element *el = &msg->elements[i];
1054 const struct ldb_schema_attribute *a;
1055 char *attr;
1056 unsigned int j;
1057
1058 /* Get a case-folded copy of the attribute name */
1059 attr = ldb_attr_casefold(ctx, el->name);
1060 if (attr == NULL) {
1061 return LDB_ERR_OPERATIONS_ERROR;
1062 }
1063
1064 a = ldb_schema_attribute_by_name(ldb, el->name);
1065
1066 if (el->num_value == 0) {
1067 ldb_asprintf_errstring(ldb, "attribute %s on %s specified, but with 0 values (illegal)",
1068 el->name, ldb_dn_get_linearized(msg->dn));
1069 return LDB_ERR_CONSTRAINT_VIOLATION;
1070 }
1071
1072 /* For each value of the specified attribute name... */
1073 for (j = 0; j < el->num_values; j++) {
1074 struct ldb_val value;
1075 char *insert;
1076
1077 /* Get a canonicalised copy of the data */
1078 a->syntax->canonicalise_fn(ldb, ctx, &(el->values[j]), &value);
1079 if (value.data == NULL) {
1080 return LDB_ERR_OPERATIONS_ERROR;
1081 }
1082
1083 insert = lsqlite3_tprintf(ctx,
1084 "INSERT OR ROLLBACK INTO ldb_attribute_values "
1085 "('eid', 'attr_name', 'norm_attr_name',"
1086 " 'attr_value', 'norm_attr_value') "
1087 "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1088 eid, el->name, attr,
1089 el->values[j].data, value.data);
1090 if (insert == NULL) {
1091 return LDB_ERR_OPERATIONS_ERROR;
1092 }
1093
1094 ret = sqlite3_exec(lsqlite3->sqlite, insert, NULL, NULL, &errmsg);
1095 if (ret != SQLITE_OK) {
1096 if (errmsg) {
1097 ldb_set_errstring(ldb, errmsg);
1098 free(errmsg);
1099 }
1100 return LDB_ERR_OPERATIONS_ERROR;
1101 }
1102 }
1103 }
1104
1105 return LDB_SUCCESS;
1106 }
1107
1108 /* modify a record */
1109 static int lsql_modify(struct lsql_context *ctx)
1110 {
1111 struct ldb_module *module = ctx->module;
1112 struct ldb_request *req = ctx->req;
1113 struct lsqlite3_private *lsqlite3;
1114 struct ldb_context *ldb;
1115 struct ldb_message *msg = req->op.mod.message;
1116 long long eid;
1117 char *errmsg;
1118 unsigned int i;
1119 int ret;
1120
1121 ldb = ldb_module_get_ctx(module);
1122 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1123 struct lsqlite3_private);
1124
1125 /* See if this is an ltdb special */
1126 if (ldb_dn_is_special(msg->dn)) {
1127 /* Others return an error */
1128 return LDB_ERR_UNWILLING_TO_PERFORM;
1129 }
1130
1131 eid = lsqlite3_get_eid(lsqlite3, msg->dn);
1132 if (eid == -1) {
1133 return LDB_ERR_OPERATIONS_ERROR;
1134 }
1135
1136 for (i = 0; i < msg->num_elements; i++) {
1137 const struct ldb_message_element *el = &msg->elements[i];
1138 const struct ldb_schema_attribute *a;
1139 unsigned int flags = el->flags & LDB_FLAG_MOD_MASK;
1140 char *attr;
1141 char *mod;
1142 unsigned int j;
1143
1144 /* Get a case-folded copy of the attribute name */
1145 attr = ldb_attr_casefold(ctx, el->name);
1146 if (attr == NULL) {
1147 return LDB_ERR_OPERATIONS_ERROR;
1148 }
1149
1150 a = ldb_schema_attribute_by_name(ldb, el->name);
1151
1152 switch (flags) {
1153
1154 case LDB_FLAG_MOD_REPLACE:
1155
1156 for (j=0; j<el->num_values; j++) {
1157 if (ldb_msg_find_val(el, &el->values[j]) != &el->values[j]) {
1158 ldb_asprintf_errstring(ldb, "%s: value #%d provided more than once", el->name, j);
1159 return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
1160 }
1161 }
1162
1163 /* remove all attributes before adding the replacements */
1164 mod = lsqlite3_tprintf(ctx,
1165 "DELETE FROM ldb_attribute_values "
1166 "WHERE eid = '%lld' "
1167 "AND norm_attr_name = '%q';",
1168 eid, attr);
1169 if (mod == NULL) {
1170 return LDB_ERR_OPERATIONS_ERROR;
1171 }
1172
1173 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1174 if (ret != SQLITE_OK) {
1175 if (errmsg) {
1176 ldb_set_errstring(ldb, errmsg);
1177 free(errmsg);
1178 }
1179 return LDB_ERR_OPERATIONS_ERROR;
1180 }
1181
1182 /* MISSING break is INTENTIONAL */
1183
1184 case LDB_FLAG_MOD_ADD:
1185
1186 if (el->num_values == 0) {
1187 ldb_asprintf_errstring(ldb, "attribute %s on %s specified, but with 0 values (illigal)",
1188 el->name, ldb_dn_get_linearized(msg->dn));
1189 return LDB_ERR_CONSTRAINT_VIOLATION;
1190 }
1191
1192 /* For each value of the specified attribute name... */
1193 for (j = 0; j < el->num_values; j++) {
1194 struct ldb_val value;
1195
1196 /* Get a canonicalised copy of the data */
1197 a->syntax->canonicalise_fn(ldb, ctx, &(el->values[j]), &value);
1198 if (value.data == NULL) {
1199 return LDB_ERR_OPERATIONS_ERROR;
1200 }
1201
1202 mod = lsqlite3_tprintf(ctx,
1203 "INSERT OR ROLLBACK INTO ldb_attribute_values "
1204 "('eid', 'attr_name', 'norm_attr_name',"
1205 " 'attr_value', 'norm_attr_value') "
1206 "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1207 eid, el->name, attr,
1208 el->values[j].data, value.data);
1209
1210 if (mod == NULL) {
1211 return LDB_ERR_OPERATIONS_ERROR;
1212 }
1213
1214 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1215 if (ret != SQLITE_OK) {
1216 if (errmsg) {
1217 ldb_set_errstring(ldb, errmsg);
1218 free(errmsg);
1219 }
1220 return LDB_ERR_OPERATIONS_ERROR;
1221 }
1222 }
1223
1224 break;
1225
1226 case LDB_FLAG_MOD_DELETE:
1227 #warning "We should throw an error if the attribute we are trying to delete does not exist!"
1228 if (el->num_values == 0) {
1229 mod = lsqlite3_tprintf(ctx,
1230 "DELETE FROM ldb_attribute_values "
1231 "WHERE eid = '%lld' "
1232 "AND norm_attr_name = '%q';",
1233 eid, attr);
1234 if (mod == NULL) {
1235 return LDB_ERR_OPERATIONS_ERROR;
1236 }
1237
1238 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1239 if (ret != SQLITE_OK) {
1240 if (errmsg) {
1241 ldb_set_errstring(ldb, errmsg);
1242 free(errmsg);
1243 }
1244 return LDB_ERR_OPERATIONS_ERROR;
1245 }
1246 }
1247
1248 /* For each value of the specified attribute name... */
1249 for (j = 0; j < el->num_values; j++) {
1250 struct ldb_val value;
1251
1252 /* Get a canonicalised copy of the data */
1253 a->syntax->canonicalise_fn(ldb, ctx, &(el->values[j]), &value);
1254 if (value.data == NULL) {
1255 return LDB_ERR_OPERATIONS_ERROR;
1256 }
1257
1258 mod = lsqlite3_tprintf(ctx,
1259 "DELETE FROM ldb_attribute_values "
1260 "WHERE eid = '%lld' "
1261 "AND norm_attr_name = '%q' "
1262 "AND norm_attr_value = '%q';",
1263 eid, attr, value.data);
1264
1265 if (mod == NULL) {
1266 return LDB_ERR_OPERATIONS_ERROR;
1267 }
1268
1269 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1270 if (ret != SQLITE_OK) {
1271 if (errmsg) {
1272 ldb_set_errstring(ldb, errmsg);
1273 free(errmsg);
1274 }
1275 return LDB_ERR_OPERATIONS_ERROR;
1276 }
1277 }
1278
1279 break;
1280 }
1281 }
1282
1283 return LDB_SUCCESS;
1284 }
1285
1286 /* delete a record */
1287 static int lsql_delete(struct lsql_context *ctx)
1288 {
1289 struct ldb_module *module = ctx->module;
1290 struct ldb_request *req = ctx->req;
1291 struct lsqlite3_private *lsqlite3;
1292 struct ldb_context *ldb;
1293 long long eid;
1294 char *errmsg;
1295 char *query;
1296 int ret;
1297
1298 ldb = ldb_module_get_ctx(module);
1299 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1300 struct lsqlite3_private);
1301
1302 eid = lsqlite3_get_eid(lsqlite3, req->op.del.dn);
1303 if (eid == -1) {
1304 return LDB_ERR_OPERATIONS_ERROR;
1305 }
1306
1307 query = lsqlite3_tprintf(ctx,
1308 /* Delete entry */
1309 "DELETE FROM ldb_entry WHERE eid = %lld; "
1310 /* Delete attributes */
1311 "DELETE FROM ldb_attribute_values WHERE eid = %lld; ",
1312 eid, eid);
1313 if (query == NULL) {
1314 return LDB_ERR_OPERATIONS_ERROR;
1315 }
1316
1317 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1318 if (ret != SQLITE_OK) {
1319 if (errmsg) {
1320 ldb_set_errstring(ldb, errmsg);
1321 free(errmsg);
1322 }
1323 return LDB_ERR_OPERATIONS_ERROR;
1324 }
1325
1326 return LDB_SUCCESS;
1327 }
1328
1329 /* rename a record */
1330 static int lsql_rename(struct lsql_context *ctx)
1331 {
1332 struct ldb_module *module = ctx->module;
1333 struct ldb_request *req = ctx->req;
1334 struct lsqlite3_private *lsqlite3;
1335 struct ldb_context *ldb;
1336 char *new_dn, *new_cdn, *old_cdn;
1337 char *errmsg;
1338 char *query;
1339 int ret;
1340
1341 ldb = ldb_module_get_ctx(module);
1342 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1343 struct lsqlite3_private);
1344
1345 /* create linearized and normalized dns */
1346 old_cdn = ldb_dn_alloc_casefold(ctx, req->op.rename.olddn);
1347 new_cdn = ldb_dn_alloc_casefold(ctx, req->op.rename.newdn);
1348 new_dn = ldb_dn_alloc_linearized(ctx, req->op.rename.newdn);
1349 if (old_cdn == NULL || new_cdn == NULL || new_dn == NULL) {
1350 return LDB_ERR_OPERATIONS_ERROR;
1351 }
1352
1353 /* build the SQL query */
1354 query = lsqlite3_tprintf(ctx,
1355 "UPDATE ldb_entry SET dn = '%q', norm_dn = '%q' "
1356 "WHERE norm_dn = '%q';",
1357 new_dn, new_cdn, old_cdn);
1358 if (query == NULL) {
1359 return LDB_ERR_OPERATIONS_ERROR;
1360 }
1361
1362 /* execute */
1363 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1364 if (ret != SQLITE_OK) {
1365 if (errmsg) {
1366 ldb_set_errstring(ldb, errmsg);
1367 free(errmsg);
1368 }
1369 return LDB_ERR_OPERATIONS_ERROR;
1370 }
1371
1372 return LDB_SUCCESS;
1373 }
1374
1375 static int lsql_start_trans(struct ldb_module * module)
1376 {
1377 int ret;
1378 char *errmsg;
1379 struct lsqlite3_private *lsqlite3;
1380
1381 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1382 struct lsqlite3_private);
1383
1384 if (lsqlite3->trans_count == 0) {
1385 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN IMMEDIATE;", NULL, NULL, &errmsg);
1386 if (ret != SQLITE_OK) {
1387 if (errmsg) {
1388 printf("lsqlite3_start_trans: error: %s\n", errmsg);
1389 free(errmsg);
1390 }
1391 return -1;
1392 }
1393 };
1394
1395 lsqlite3->trans_count++;
1396
1397 return 0;
1398 }
1399
1400 static int lsql_end_trans(struct ldb_module *module)
1401 {
1402 int ret;
1403 char *errmsg;
1404 struct lsqlite3_private *lsqlite3;
1405
1406 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1407 struct lsqlite3_private);
1408
1409 if (lsqlite3->trans_count > 0) {
1410 lsqlite3->trans_count--;
1411 } else return -1;
1412
1413 if (lsqlite3->trans_count == 0) {
1414 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1415 if (ret != SQLITE_OK) {
1416 if (errmsg) {
1417 printf("lsqlite3_end_trans: error: %s\n", errmsg);
1418 free(errmsg);
1419 }
1420 return -1;
1421 }
1422 }
1423
1424 return 0;
1425 }
1426
1427 static int lsql_del_trans(struct ldb_module *module)
1428 {
1429 struct lsqlite3_private *lsqlite3;
1430
1431 lsqlite3 = talloc_get_type(ldb_module_get_private(module),
1432 struct lsqlite3_private);
1433
1434 if (lsqlite3->trans_count > 0) {
1435 lsqlite3->trans_count--;
1436 } else return -1;
1437
1438 if (lsqlite3->trans_count == 0) {
1439 return lsqlite3_safe_rollback(lsqlite3->sqlite);
1440 }
1441
1442 return -1;
1443 }
1444
1445 static int destructor(struct lsqlite3_private *lsqlite3)
1446 {
1447 if (lsqlite3->sqlite) {
1448 sqlite3_close(lsqlite3->sqlite);
1449 }
1450 return 0;
1451 }
1452
1453 static void lsql_request_done(struct lsql_context *ctx, int error)
1454 {
1455 struct ldb_context *ldb;
1456 struct ldb_request *req;
1457 struct ldb_reply *ares;
1458
1459 ldb = ldb_module_get_ctx(ctx->module);
1460 req = ctx->req;
1461
1462 /* if we already returned an error just return */
1463 if (ldb_request_get_status(req) != LDB_SUCCESS) {
1464 return;
1465 }
1466
1467 ares = talloc_zero(req, struct ldb_reply);
1468 if (!ares) {
1469 ldb_oom(ldb);
1470 req->callback(req, NULL);
1471 return;
1472 }
1473 ares->type = LDB_REPLY_DONE;
1474 ares->error = error;
1475
1476 req->callback(req, ares);
1477 }
1478
1479 static void lsql_timeout(struct tevent_context *ev,
1480 struct tevent_timer *te,
1481 struct timeval t,
1482 void *private_data)
1483 {
1484 struct lsql_context *ctx;
1485 ctx = talloc_get_type(private_data, struct lsql_context);
1486
1487 lsql_request_done(ctx, LDB_ERR_TIME_LIMIT_EXCEEDED);
1488 }
1489
1490 static void lsql_callback(struct tevent_context *ev,
1491 struct tevent_timer *te,
1492 struct timeval t,
1493 void *private_data)
1494 {
1495 struct lsql_context *ctx;
1496 int ret;
1497
1498 ctx = talloc_get_type(private_data, struct lsql_context);
1499
1500 switch (ctx->req->operation) {
1501 case LDB_SEARCH:
1502 ret = lsql_search(ctx);
1503 break;
1504 case LDB_ADD:
1505 ret = lsql_add(ctx);
1506 break;
1507 case LDB_MODIFY:
1508 ret = lsql_modify(ctx);
1509 break;
1510 case LDB_DELETE:
1511 ret = lsql_delete(ctx);
1512 break;
1513 case LDB_RENAME:
1514 ret = lsql_rename(ctx);
1515 break;
1516 /* TODO:
1517 case LDB_EXTENDED:
1518 ret = lsql_extended(ctx);
1519 break;
1520 */
1521 default:
1522 /* no other op supported */
1523 ret = LDB_ERR_PROTOCOL_ERROR;
1524 }
1525
1526 if (!ctx->callback_failed) {
1527 /* Once we are done, we do not need timeout events */
1528 talloc_free(ctx->timeout_event);
1529 lsql_request_done(ctx, ret);
1530 }
1531 }
1532
1533 static int lsql_handle_request(struct ldb_module *module, struct ldb_request *req)
1534 {
1535 struct ldb_context *ldb;
1536 struct tevent_context *ev;
1537 struct lsql_context *ac;
1538 struct tevent_timer *te;
1539 struct timeval tv;
1540
1541 if (ldb_check_critical_controls(req->controls)) {
1542 return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
1543 }
1544
1545 if (req->starttime == 0 || req->timeout == 0) {
1546 ldb_set_errstring(ldb, "Invalid timeout settings");
1547 return LDB_ERR_TIME_LIMIT_EXCEEDED;
1548 }
1549
1550 ldb = ldb_module_get_ctx(module);
1551 ev = ldb_get_event_context(ldb);
1552
1553 ac = talloc_zero(req, struct lsql_context);
1554 if (ac == NULL) {
1555 ldb_set_errstring(ldb, "Out of Memory");
1556 return LDB_ERR_OPERATIONS_ERROR;
1557 }
1558
1559 ac->module = module;
1560 ac->req = req;
1561
1562 tv.tv_sec = 0;
1563 tv.tv_usec = 0;
1564 te = tevent_add_timer(ev, ac, tv, lsql_callback, ac);
1565 if (NULL == te) {
1566 return LDB_ERR_OPERATIONS_ERROR;
1567 }
1568
1569 tv.tv_sec = req->starttime + req->timeout;
1570 ac->timeout_event = tevent_add_timer(ev, ac, tv, lsql_timeout, ac);
1571 if (NULL == ac->timeout_event) {
1572 return LDB_ERR_OPERATIONS_ERROR;
1573 }
1574
1575 return LDB_SUCCESS;
1576 }
1577
1578 /*
1579 * Table of operations for the sqlite3 backend
1580 */
1581 static const struct ldb_module_ops lsqlite3_ops = {
1582 .name = "sqlite",
1583 .search = lsql_handle_request,
1584 .add = lsql_handle_request,
1585 .modify = lsql_handle_request,
1586 .del = lsql_handle_request,
1587 .rename = lsql_handle_request,
1588 .extended = lsql_handle_request,
1589 .start_transaction = lsql_start_trans,
1590 .end_transaction = lsql_end_trans,
1591 .del_transaction = lsql_del_trans,
1592 };
1593
1594 /*
1595 * Static functions
1596 */
1597
1598 static int initialize(struct lsqlite3_private *lsqlite3,
1599 struct ldb_context *ldb, const char *url,
1600 unsigned int flags)
1601 {
1602 TALLOC_CTX *local_ctx;
1603 long long queryInt;
1604 int rollback = 0;
1605 char *errmsg;
1606 char *schema;
1607 int ret;
1608
1609 /* create a local ctx */
1610 local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context");
1611 if (local_ctx == NULL) {
1612 return -1;
1613 }
1614
1615 schema = lsqlite3_tprintf(local_ctx,
1616
1617
1618 "CREATE TABLE ldb_info AS "
1619 " SELECT 'LDB' AS database_type,"
1620 " '1.0' AS version;"
1621
1622 /*
1623 * The entry table holds the information about an entry.
1624 * This table is used to obtain the EID of the entry and to
1625 * support scope=one and scope=base. The parent and child
1626 * table is included in the entry table since all the other
1627 * attributes are dependent on EID.
1628 */
1629 "CREATE TABLE ldb_entry "
1630 "("
1631 " eid INTEGER PRIMARY KEY AUTOINCREMENT,"
1632 " dn TEXT UNIQUE NOT NULL,"
1633 " norm_dn TEXT UNIQUE NOT NULL"
1634 ");"
1635
1636
1637 "CREATE TABLE ldb_object_classes"
1638 "("
1639 " class_name TEXT PRIMARY KEY,"
1640 " parent_class_name TEXT,"
1641 " tree_key TEXT UNIQUE,"
1642 " max_child_num INTEGER DEFAULT 0"
1643 ");"
1644
1645 /*
1646 * We keep a full listing of attribute/value pairs here
1647 */
1648 "CREATE TABLE ldb_attribute_values"
1649 "("
1650 " eid INTEGER REFERENCES ldb_entry,"
1651 " attr_name TEXT,"
1652 " norm_attr_name TEXT,"
1653 " attr_value TEXT,"
1654 " norm_attr_value TEXT "
1655 ");"
1656
1657
1658 /*
1659 * Indexes
1660 */
1661 "CREATE INDEX ldb_attribute_values_eid_idx "
1662 " ON ldb_attribute_values (eid);"
1663
1664 "CREATE INDEX ldb_attribute_values_name_value_idx "
1665 " ON ldb_attribute_values (attr_name, norm_attr_value);"
1666
1667
1668
1669 /*
1670 * Triggers
1671 */
1672
1673 "CREATE TRIGGER ldb_object_classes_insert_tr"
1674 " AFTER INSERT"
1675 " ON ldb_object_classes"
1676 " FOR EACH ROW"
1677 " BEGIN"
1678 " UPDATE ldb_object_classes"
1679 " SET tree_key = COALESCE(tree_key, "
1680 " ("
1681 " SELECT tree_key || "
1682 " (SELECT base160(max_child_num + 1)"
1683 " FROM ldb_object_classes"
1684 " WHERE class_name = "
1685 " new.parent_class_name)"
1686 " FROM ldb_object_classes "
1687 " WHERE class_name = new.parent_class_name "
1688 " ));"
1689 " UPDATE ldb_object_classes "
1690 " SET max_child_num = max_child_num + 1"
1691 " WHERE class_name = new.parent_class_name;"
1692 " END;"
1693
1694 /*
1695 * Table initialization
1696 */
1697
1698 "INSERT INTO ldb_object_classes "
1699 " (class_name, tree_key) "
1700 " VALUES "
1701 " ('TOP', '0001');");
1702
1703 /* Skip protocol indicator of url */
1704 if (strncmp(url, "sqlite3://", 10) != 0) {
1705 return SQLITE_MISUSE;
1706 }
1707
1708 /* Update pointer to just after the protocol indicator */
1709 url += 10;
1710
1711 /* Try to open the (possibly empty/non-existent) database */
1712 if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) {
1713 return ret;
1714 }
1715
1716 /* In case this is a new database, enable auto_vacuum */
1717 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA auto_vacuum = 1;", NULL, NULL, &errmsg);
1718 if (ret != SQLITE_OK) {
1719 if (errmsg) {
1720 printf("lsqlite3 initializaion error: %s\n", errmsg);
1721 free(errmsg);
1722 }
1723 goto failed;
1724 }
1725
1726 if (flags & LDB_FLG_NOSYNC) {
1727 /* DANGEROUS */
1728 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA synchronous = OFF;", NULL, NULL, &errmsg);
1729 if (ret != SQLITE_OK) {
1730 if (errmsg) {
1731 printf("lsqlite3 initializaion error: %s\n", errmsg);
1732 free(errmsg);
1733 }
1734 goto failed;
1735 }
1736 }
1737
1738 /* */
1739
1740 /* Establish a busy timeout of 30 seconds */
1741 if ((ret = sqlite3_busy_timeout(lsqlite3->sqlite,
1742 30000)) != SQLITE_OK) {
1743 return ret;
1744 }
1745
1746 /* Create a function, callable from sql, to increment a tree_key */
1747 if ((ret =
1748 sqlite3_create_function(lsqlite3->sqlite,/* handle */
1749 "base160_next", /* function name */
1750 1, /* number of args */
1751 SQLITE_ANY, /* preferred text type */
1752 NULL, /* user data */
1753 base160next_sql, /* called func */
1754 NULL, /* step func */
1755 NULL /* final func */
1756 )) != SQLITE_OK) {
1757 return ret;
1758 }
1759
1760 /* Create a function, callable from sql, to convert int to base160 */
1761 if ((ret =
1762 sqlite3_create_function(lsqlite3->sqlite,/* handle */
1763 "base160", /* function name */
1764 1, /* number of args */
1765 SQLITE_ANY, /* preferred text type */
1766 NULL, /* user data */
1767 base160_sql, /* called func */
1768 NULL, /* step func */
1769 NULL /* final func */
1770 )) != SQLITE_OK) {
1771 return ret;
1772 }
1773
1774 /* Create a function, callable from sql, to perform various comparisons */
1775 if ((ret =
1776 sqlite3_create_function(lsqlite3->sqlite, /* handle */
1777 "ldap_compare", /* function name */
1778 4, /* number of args */
1779 SQLITE_ANY, /* preferred text type */
1780 ldb , /* user data */
1781 lsqlite3_compare, /* called func */
1782 NULL, /* step func */
1783 NULL /* final func */
1784 )) != SQLITE_OK) {
1785 return ret;
1786 }
1787
1788 /* Begin a transaction */
1789 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg);
1790 if (ret != SQLITE_OK) {
1791 if (errmsg) {
1792 printf("lsqlite3: initialization error: %s\n", errmsg);
1793 free(errmsg);
1794 }
1795 goto failed;
1796 }
1797 rollback = 1;
1798
1799 /* Determine if this is a new database. No tables means it is. */
1800 if (query_int(lsqlite3,
1801 &queryInt,
1802 "SELECT COUNT(*)\n"
1803 " FROM sqlite_master\n"
1804 " WHERE type = 'table';") != 0) {
1805 goto failed;
1806 }
1807
1808 if (queryInt == 0) {
1809 /*
1810 * Create the database schema
1811 */
1812 ret = sqlite3_exec(lsqlite3->sqlite, schema, NULL, NULL, &errmsg);
1813 if (ret != SQLITE_OK) {
1814 if (errmsg) {
1815 printf("lsqlite3 initializaion error: %s\n", errmsg);
1816 free(errmsg);
1817 }
1818 goto failed;
1819 }
1820 } else {
1821 /*
1822 * Ensure that the database we opened is one of ours
1823 */
1824 if (query_int(lsqlite3,
1825 &queryInt,
1826 "SELECT "
1827 " (SELECT COUNT(*) = 2"
1828 " FROM sqlite_master "
1829 " WHERE type = 'table' "
1830 " AND name IN "
1831 " ("
1832 " 'ldb_entry', "
1833 " 'ldb_object_classes' "
1834 " ) "
1835 " ) "
1836 " AND "
1837 " (SELECT 1 "
1838 " FROM ldb_info "
1839 " WHERE database_type = 'LDB' "
1840 " AND version = '1.0'"
1841 " );") != 0 ||
1842 queryInt != 1) {
1843
1844 /* It's not one that we created. See ya! */
1845 goto failed;
1846 }
1847 }
1848
1849 /* Commit the transaction */
1850 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1851 if (ret != SQLITE_OK) {
1852 if (errmsg) {
1853 printf("lsqlite3: iniialization error: %s\n", errmsg);
1854 free(errmsg);
1855 }
1856 goto failed;
1857 }
1858
1859 return SQLITE_OK;
1860
1861 failed:
1862 if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite);
1863 sqlite3_close(lsqlite3->sqlite);
1864 return -1;
1865 }
1866
1867 /*
1868 * connect to the database
1869 */
1870 static int lsqlite3_connect(struct ldb_context *ldb,
1871 const char *url,
1872 unsigned int flags,
1873 const char *options[],
1874 struct ldb_module **_module)
1875 {
1876 struct ldb_module *module;
1877 struct lsqlite3_private *lsqlite3;
1878 unsigned int i;
1879 int ret;
1880
1881 module = ldb_module_new(ldb, ldb, "ldb_sqlite3 backend", &lsqlite3_ops);
1882 if (!module) return LDB_ERR_OPERATIONS_ERROR;
1883
1884 lsqlite3 = talloc(module, struct lsqlite3_private);
1885 if (!lsqlite3) {
1886 goto failed;
1887 }
1888
1889 lsqlite3->sqlite = NULL;
1890 lsqlite3->options = NULL;
1891 lsqlite3->trans_count = 0;
1892
1893 ret = initialize(lsqlite3, ldb, url, flags);
1894 if (ret != SQLITE_OK) {
1895 goto failed;
1896 }
1897
1898 talloc_set_destructor(lsqlite3, destructor);
1899
1900 ldb_module_set_private(module, lsqlite3);
1901
1902 if (options) {
1903 /*
1904 * take a copy of the options array, so we don't have to rely
1905 * on the caller keeping it around (it might be dynamic)
1906 */
1907 for (i=0;options[i];i++) ;
1908
1909 lsqlite3->options = talloc_array(lsqlite3, char *, i+1);
1910 if (!lsqlite3->options) {
1911 goto failed;
1912 }
1913
1914 for (i=0;options[i];i++) {
1915
1916 lsqlite3->options[i+1] = NULL;
1917 lsqlite3->options[i] =
1918 talloc_strdup(lsqlite3->options, options[i]);
1919 if (!lsqlite3->options[i]) {
1920 goto failed;
1921 }
1922 }
1923 }
1924
1925 *_module = module;
1926 return LDB_SUCCESS;
1927
1928 failed:
1929 if (lsqlite3 && lsqlite3->sqlite != NULL) {
1930 (void) sqlite3_close(lsqlite3->sqlite);
1931 }
1932 talloc_free(lsqlite3);
1933 return LDB_ERR_OPERATIONS_ERROR;
1934 }
1935
1936 int ldb_sqlite3_init(const char *version)
1937 {
1938 LDB_MODULE_CHECK_VERSION(version);
1939 return ldb_register_backend("sqlite3", lsqlite3_connect, false);
1940 }
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