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r23798: updated old Temple Place FSF addresses to new URL
[Samba.git] / source / lib / ldb / ldb_sqlite3 / ldb_sqlite3.c
blobcb516b6e751b3d9d0c7d77faa77f3c44ebcab15d
1 /*
2 ldb database library
3
4 Copyright (C) Derrell Lipman 2005
5 Copyright (C) Simo Sorce 2005-2006
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 "includes.h"
36 #include "ldb/include/includes.h"
37
38 #include <sqlite3.h>
39
40 struct lsqlite3_private {
41 int trans_count;
42 char **options;
43 sqlite3 *sqlite;
44 };
45
46 struct lsql_context {
47 struct ldb_module *module;
48
49 /* search stuff */
50 long long current_eid;
51 const char * const * attrs;
52 struct ldb_reply *ares;
53
54 /* async stuff */
55 void *context;
56 int (*callback)(struct ldb_context *, void *, struct ldb_reply *);
57 };
58
59 static struct ldb_handle *init_handle(struct lsqlite3_private *lsqlite3,
60 struct ldb_module *module,
61 struct ldb_request *req)
62 {
63 struct lsql_context *ac;
64 struct ldb_handle *h;
65
66 h = talloc_zero(lsqlite3, struct ldb_handle);
67 if (h == NULL) {
68 ldb_set_errstring(module->ldb, "Out of Memory");
69 return NULL;
70 }
71
72 h->module = module;
73
74 ac = talloc(h, struct lsql_context);
75 if (ac == NULL) {
76 ldb_set_errstring(module->ldb, "Out of Memory");
77 talloc_free(h);
78 return NULL;
79 }
80
81 h->private_data = (void *)ac;
82
83 h->state = LDB_ASYNC_INIT;
84 h->status = LDB_SUCCESS;
85
86 ac->module = module;
87 ac->context = req->context;
88 ac->callback = req->callback;
89
90 return h;
91 }
92
93 /*
94 * Macros used throughout
95 */
96
97 #ifndef FALSE
98 # define FALSE (0)
99 # define TRUE (! FALSE)
100 #endif
101
102 #define RESULT_ATTR_TABLE "temp_result_attrs"
103
104 //#define TEMPTAB /* for testing, create non-temporary table */
105 #define TEMPTAB "TEMPORARY"
106
107 /*
108 * Static variables
109 */
110 sqlite3_stmt * stmtGetEID = NULL;
111
112 static char *lsqlite3_tprintf(TALLOC_CTX *mem_ctx, const char *fmt, ...)
113 {
114 char *str, *ret;
115 va_list ap;
116
117 va_start(ap, fmt);
118 str = sqlite3_vmprintf(fmt, ap);
119 va_end(ap);
120
121 if (str == NULL) return NULL;
122
123 ret = talloc_strdup(mem_ctx, str);
124 if (ret == NULL) {
125 sqlite3_free(str);
126 return NULL;
127 }
128
129 sqlite3_free(str);
130 return ret;
131 }
132
133 static char base160tab[161] = {
134 48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 , /* 0-9 */
135 58 ,59 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 , /* : ; A-H */
136 73 ,74 ,75 ,76 ,77 ,78 ,79 ,80 ,81 ,82 , /* I-R */
137 83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,97 ,98 , /* S-Z , a-b */
138 99 ,100,101,102,103,104,105,106,107,108, /* c-l */
139 109,110,111,112,113,114,115,116,117,118, /* m-v */
140 119,120,121,122,160,161,162,163,164,165, /* w-z, latin1 */
141 166,167,168,169,170,171,172,173,174,175, /* latin1 */
142 176,177,178,179,180,181,182,183,184,185, /* latin1 */
143 186,187,188,189,190,191,192,193,194,195, /* latin1 */
144 196,197,198,199,200,201,202,203,204,205, /* latin1 */
145 206,207,208,209,210,211,212,213,214,215, /* latin1 */
146 216,217,218,219,220,221,222,223,224,225, /* latin1 */
147 226,227,228,229,230,231,232,233,234,235, /* latin1 */
148 236,237,238,239,240,241,242,243,244,245, /* latin1 */
149 246,247,248,249,250,251,252,253,254,255, /* latin1 */
150 '\0'
151 };
152
153
154 /*
155 * base160()
156 *
157 * Convert an unsigned long integer into a base160 representation of the
158 * number.
159 *
160 * Parameters:
161 * val --
162 * value to be converted
163 *
164 * result --
165 * character array, 5 bytes long, into which the base160 representation
166 * will be placed. The result will be a four-digit representation of the
167 * number (with leading zeros prepended as necessary), and null
168 * terminated.
169 *
170 * Returns:
171 * Nothing
172 */
173 static void
174 base160_sql(sqlite3_context * hContext,
175 int argc,
176 sqlite3_value ** argv)
177 {
178 int i;
179 long long val;
180 char result[5];
181
182 val = sqlite3_value_int64(argv[0]);
183
184 for (i = 3; i >= 0; i--) {
185
186 result[i] = base160tab[val % 160];
187 val /= 160;
188 }
189
190 result[4] = '\0';
191
192 sqlite3_result_text(hContext, result, -1, SQLITE_TRANSIENT);
193 }
194
195
196 /*
197 * base160next_sql()
198 *
199 * This function enhances sqlite by adding a "base160_next()" function which is
200 * accessible via queries.
201 *
202 * Retrieve the next-greater number in the base160 sequence for the terminal
203 * tree node (the last four digits). Only one tree level (four digits) is
204 * operated on.
205 *
206 * Input:
207 * A character string: either an empty string (in which case no operation is
208 * performed), or a string of base160 digits with a length of a multiple of
209 * four digits.
210 *
211 * Output:
212 * Upon return, the trailing four digits (one tree level) will have been
213 * incremented by 1.
214 */
215 static void
216 base160next_sql(sqlite3_context * hContext,
217 int argc,
218 sqlite3_value ** argv)
219 {
220 int i;
221 int len;
222 char * pTab;
223 char * pBase160 = strdup((const char *)sqlite3_value_text(argv[0]));
224 char * pStart = pBase160;
225
226 /*
227 * We need a minimum of four digits, and we will always get a multiple
228 * of four digits.
229 */
230 if (pBase160 != NULL &&
231 (len = strlen(pBase160)) >= 4 &&
232 len % 4 == 0) {
233
234 if (pBase160 == NULL) {
235
236 sqlite3_result_null(hContext);
237 return;
238 }
239
240 pBase160 += strlen(pBase160) - 1;
241
242 /* We only carry through four digits: one level in the tree */
243 for (i = 0; i < 4; i++) {
244
245 /* What base160 value does this digit have? */
246 pTab = strchr(base160tab, *pBase160);
247
248 /* Is there a carry? */
249 if (pTab < base160tab + sizeof(base160tab) - 1) {
250
251 /*
252 * Nope. Just increment this value and we're
253 * done.
254 */
255 *pBase160 = *++pTab;
256 break;
257 } else {
258
259 /*
260 * There's a carry. This value gets
261 * base160tab[0], we decrement the buffer
262 * pointer to get the next higher-order digit,
263 * and continue in the loop.
264 */
265 *pBase160-- = base160tab[0];
266 }
267 }
268
269 sqlite3_result_text(hContext,
270 pStart,
271 strlen(pStart),
272 free);
273 } else {
274 sqlite3_result_value(hContext, argv[0]);
275 if (pBase160 != NULL) {
276 free(pBase160);
277 }
278 }
279 }
280
281 static char *parsetree_to_sql(struct ldb_module *module,
282 void *mem_ctx,
283 const struct ldb_parse_tree *t)
284 {
285 const struct ldb_attrib_handler *h;
286 struct ldb_val value, subval;
287 char *wild_card_string;
288 char *child, *tmp;
289 char *ret = NULL;
290 char *attr;
291 int i;
292
293
294 switch(t->operation) {
295 case LDB_OP_AND:
296
297 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
298 if (tmp == NULL) return NULL;
299
300 for (i = 1; i < t->u.list.num_elements; i++) {
301
302 child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
303 if (child == NULL) return NULL;
304
305 tmp = talloc_asprintf_append(tmp, " INTERSECT %s ", child);
306 if (tmp == NULL) return NULL;
307 }
308
309 ret = talloc_asprintf(mem_ctx, "SELECT * FROM ( %s )\n", tmp);
310
311 return ret;
312
313 case LDB_OP_OR:
314
315 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
316 if (tmp == NULL) return NULL;
317
318 for (i = 1; i < t->u.list.num_elements; i++) {
319
320 child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
321 if (child == NULL) return NULL;
322
323 tmp = talloc_asprintf_append(tmp, " UNION %s ", child);
324 if (tmp == NULL) return NULL;
325 }
326
327 return talloc_asprintf(mem_ctx, "SELECT * FROM ( %s ) ", tmp);
328
329 case LDB_OP_NOT:
330
331 child = parsetree_to_sql(module, mem_ctx, t->u.isnot.child);
332 if (child == NULL) return NULL;
333
334 return talloc_asprintf(mem_ctx,
335 "SELECT eid FROM ldb_entry "
336 "WHERE eid NOT IN ( %s ) ", child);
337
338 case LDB_OP_EQUALITY:
339 /*
340 * For simple searches, we want to retrieve the list of EIDs that
341 * match the criteria.
342 */
343 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
344 if (attr == NULL) return NULL;
345 h = ldb_attrib_handler(module->ldb, attr);
346
347 /* Get a canonicalised copy of the data */
348 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
349 if (value.data == NULL) {
350 return NULL;
351 }
352
353 if (strcasecmp(t->u.equality.attr, "objectclass") == 0) {
354 /*
355 * For object classes, we want to search for all objectclasses
356 * that are subclasses as well.
357 */
358 return lsqlite3_tprintf(mem_ctx,
359 "SELECT eid FROM ldb_attribute_values\n"
360 "WHERE norm_attr_name = 'OBJECTCLASS' "
361 "AND norm_attr_value IN\n"
362 " (SELECT class_name FROM ldb_object_classes\n"
363 " WHERE tree_key GLOB\n"
364 " (SELECT tree_key FROM ldb_object_classes\n"
365 " WHERE class_name = '%q'\n"
366 " ) || '*'\n"
367 " )\n", value.data);
368
369 } else if (strcasecmp(t->u.equality.attr, "dn") == 0) {
370 /* DN query is a special ldb case */
371 char *cdn = ldb_dn_linearize_casefold(module->ldb,
372 mem_ctx,
373 ldb_dn_explode(module->ldb,
374 (const char *)value.data));
375
376 return lsqlite3_tprintf(mem_ctx,
377 "SELECT eid FROM ldb_entry "
378 "WHERE norm_dn = '%q'", cdn);
379
380 } else {
381 /* A normal query. */
382 return lsqlite3_tprintf(mem_ctx,
383 "SELECT eid FROM ldb_attribute_values "
384 "WHERE norm_attr_name = '%q' "
385 "AND norm_attr_value = '%q'",
386 attr,
387 value.data);
388
389 }
390
391 case LDB_OP_SUBSTRING:
392
393 wild_card_string = talloc_strdup(mem_ctx,
394 (t->u.substring.start_with_wildcard)?"*":"");
395 if (wild_card_string == NULL) return NULL;
396
397 for (i = 0; t->u.substring.chunks[i]; i++) {
398 wild_card_string = talloc_asprintf_append(wild_card_string, "%s*",
399 t->u.substring.chunks[i]->data);
400 if (wild_card_string == NULL) return NULL;
401 }
402
403 if ( ! t->u.substring.end_with_wildcard ) {
404 /* remove last wildcard */
405 wild_card_string[strlen(wild_card_string) - 1] = '\0';
406 }
407
408 attr = ldb_attr_casefold(mem_ctx, t->u.substring.attr);
409 if (attr == NULL) return NULL;
410 h = ldb_attrib_handler(module->ldb, attr);
411
412 subval.data = (void *)wild_card_string;
413 subval.length = strlen(wild_card_string) + 1;
414
415 /* Get a canonicalised copy of the data */
416 h->canonicalise_fn(module->ldb, mem_ctx, &(subval), &value);
417 if (value.data == NULL) {
418 return NULL;
419 }
420
421 return lsqlite3_tprintf(mem_ctx,
422 "SELECT eid FROM ldb_attribute_values "
423 "WHERE norm_attr_name = '%q' "
424 "AND norm_attr_value GLOB '%q'",
425 attr,
426 value.data);
427
428 case LDB_OP_GREATER:
429 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
430 if (attr == NULL) return NULL;
431 h = ldb_attrib_handler(module->ldb, attr);
432
433 /* Get a canonicalised copy of the data */
434 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
435 if (value.data == NULL) {
436 return NULL;
437 }
438
439 return lsqlite3_tprintf(mem_ctx,
440 "SELECT eid FROM ldb_attribute_values "
441 "WHERE norm_attr_name = '%q' "
442 "AND ldap_compare(norm_attr_value, '>=', '%q', '%q') ",
443 attr,
444 value.data,
445 attr);
446
447 case LDB_OP_LESS:
448 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
449 if (attr == NULL) return NULL;
450 h = ldb_attrib_handler(module->ldb, attr);
451
452 /* Get a canonicalised copy of the data */
453 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
454 if (value.data == NULL) {
455 return NULL;
456 }
457
458 return lsqlite3_tprintf(mem_ctx,
459 "SELECT eid FROM ldb_attribute_values "
460 "WHERE norm_attr_name = '%q' "
461 "AND ldap_compare(norm_attr_value, '<=', '%q', '%q') ",
462 attr,
463 value.data,
464 attr);
465
466 case LDB_OP_PRESENT:
467 if (strcasecmp(t->u.present.attr, "dn") == 0) {
468 return talloc_strdup(mem_ctx, "SELECT eid FROM ldb_entry");
469 }
470
471 attr = ldb_attr_casefold(mem_ctx, t->u.present.attr);
472 if (attr == NULL) return NULL;
473
474 return lsqlite3_tprintf(mem_ctx,
475 "SELECT eid FROM ldb_attribute_values "
476 "WHERE norm_attr_name = '%q' ",
477 attr);
478
479 case LDB_OP_APPROX:
480 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
481 if (attr == NULL) return NULL;
482 h = ldb_attrib_handler(module->ldb, attr);
483
484 /* Get a canonicalised copy of the data */
485 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
486 if (value.data == NULL) {
487 return NULL;
488 }
489
490 return lsqlite3_tprintf(mem_ctx,
491 "SELECT eid FROM ldb_attribute_values "
492 "WHERE norm_attr_name = '%q' "
493 "AND ldap_compare(norm_attr_value, '~%', 'q', '%q') ",
494 attr,
495 value.data,
496 attr);
497
498 case LDB_OP_EXTENDED:
499 #warning "work out how to handle bitops"
500 return NULL;
501
502 default:
503 break;
504 };
505
506 /* should never occur */
507 abort();
508 return NULL;
509 }
510
511 /*
512 * query_int()
513 *
514 * This function is used for the common case of queries that return a single
515 * integer value.
516 *
517 * NOTE: If more than one value is returned by the query, all but the first
518 * one will be ignored.
519 */
520 static int
521 query_int(const struct lsqlite3_private * lsqlite3,
522 long long * pRet,
523 const char * pSql,
524 ...)
525 {
526 int ret;
527 int bLoop;
528 char * p;
529 sqlite3_stmt * pStmt;
530 va_list args;
531
532 /* Begin access to variable argument list */
533 va_start(args, pSql);
534
535 /* Format the query */
536 if ((p = sqlite3_vmprintf(pSql, args)) == NULL) {
537 return SQLITE_NOMEM;
538 }
539
540 /*
541 * Prepare and execute the SQL statement. Loop allows retrying on
542 * certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes,
543 * requiring retrying the operation.
544 */
545 for (bLoop = TRUE; bLoop; ) {
546
547 /* Compile the SQL statement into sqlite virtual machine */
548 if ((ret = sqlite3_prepare(lsqlite3->sqlite,
549 p,
550 -1,
551 &pStmt,
552 NULL)) == SQLITE_SCHEMA) {
553 if (stmtGetEID != NULL) {
554 sqlite3_finalize(stmtGetEID);
555 stmtGetEID = NULL;
556 }
557 continue;
558 } else if (ret != SQLITE_OK) {
559 break;
560 }
561
562 /* One row expected */
563 if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) {
564 if (stmtGetEID != NULL) {
565 sqlite3_finalize(stmtGetEID);
566 stmtGetEID = NULL;
567 }
568 (void) sqlite3_finalize(pStmt);
569 continue;
570 } else if (ret != SQLITE_ROW) {
571 (void) sqlite3_finalize(pStmt);
572 break;
573 }
574
575 /* Get the value to be returned */
576 *pRet = sqlite3_column_int64(pStmt, 0);
577
578 /* Free the virtual machine */
579 if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) {
580 if (stmtGetEID != NULL) {
581 sqlite3_finalize(stmtGetEID);
582 stmtGetEID = NULL;
583 }
584 continue;
585 } else if (ret != SQLITE_OK) {
586 (void) sqlite3_finalize(pStmt);
587 break;
588 }
589
590 /*
591 * Normal condition is only one time through loop. Loop is
592 * rerun in error conditions, via "continue", above.
593 */
594 bLoop = FALSE;
595 }
596
597 /* All done with variable argument list */
598 va_end(args);
599
600
601 /* Free the memory we allocated for our query string */
602 sqlite3_free(p);
603
604 return ret;
605 }
606
607 /*
608 * This is a bad hack to support ldap style comparisons whithin sqlite.
609 * val is the attribute in the row currently under test
610 * func is the desired test "<=" ">=" "~" ":"
611 * cmp is the value to compare against (eg: "test")
612 * attr is the attribute name the value of which we want to test
613 */
614
615 static void lsqlite3_compare(sqlite3_context *ctx, int argc,
616 sqlite3_value **argv)
617 {
618 struct ldb_context *ldb = (struct ldb_context *)sqlite3_user_data(ctx);
619 const char *val = (const char *)sqlite3_value_text(argv[0]);
620 const char *func = (const char *)sqlite3_value_text(argv[1]);
621 const char *cmp = (const char *)sqlite3_value_text(argv[2]);
622 const char *attr = (const char *)sqlite3_value_text(argv[3]);
623 const struct ldb_attrib_handler *h;
624 struct ldb_val valX;
625 struct ldb_val valY;
626 int ret;
627
628 switch (func[0]) {
629 /* greater */
630 case '>': /* >= */
631 h = ldb_attrib_handler(ldb, attr);
632 valX.data = (void *)cmp;
633 valX.length = strlen(cmp);
634 valY.data = (void *)val;
635 valY.length = strlen(val);
636 ret = h->comparison_fn(ldb, ldb, &valY, &valX);
637 if (ret >= 0)
638 sqlite3_result_int(ctx, 1);
639 else
640 sqlite3_result_int(ctx, 0);
641 return;
642
643 /* lesser */
644 case '<': /* <= */
645 h = ldb_attrib_handler(ldb, attr);
646 valX.data = (void *)cmp;
647 valX.length = strlen(cmp);
648 valY.data = (void *)val;
649 valY.length = strlen(val);
650 ret = h->comparison_fn(ldb, ldb, &valY, &valX);
651 if (ret <= 0)
652 sqlite3_result_int(ctx, 1);
653 else
654 sqlite3_result_int(ctx, 0);
655 return;
656
657 /* approx */
658 case '~':
659 /* TODO */
660 sqlite3_result_int(ctx, 0);
661 return;
662
663 /* bitops */
664 case ':':
665 /* TODO */
666 sqlite3_result_int(ctx, 0);
667 return;
668
669 default:
670 break;
671 }
672
673 sqlite3_result_error(ctx, "Value must start with a special operation char (<>~:)!", -1);
674 return;
675 }
676
677
678 /* rename a record */
679 static int lsqlite3_safe_rollback(sqlite3 *sqlite)
680 {
681 char *errmsg;
682 int ret;
683
684 /* execute */
685 ret = sqlite3_exec(sqlite, "ROLLBACK;", NULL, NULL, &errmsg);
686 if (ret != SQLITE_OK) {
687 if (errmsg) {
688 printf("lsqlite3_safe_rollback: Error: %s\n", errmsg);
689 free(errmsg);
690 }
691 return -1;
692 }
693
694 return 0;
695 }
696
697 /* return an eid as result */
698 static int lsqlite3_eid_callback(void *result, int col_num, char **cols, char **names)
699 {
700 long long *eid = (long long *)result;
701
702 if (col_num != 1) return SQLITE_ABORT;
703 if (strcasecmp(names[0], "eid") != 0) return SQLITE_ABORT;
704
705 *eid = atoll(cols[0]);
706 return SQLITE_OK;
707 }
708
709 /*
710 * add a single set of ldap message values to a ldb_message
711 */
712 static int lsqlite3_search_callback(void *result, int col_num, char **cols, char **names)
713 {
714 struct ldb_handle *handle = talloc_get_type(result, struct ldb_handle);
715 struct lsql_context *ac = talloc_get_type(handle->private_data, struct lsql_context);
716 struct ldb_message *msg;
717 long long eid;
718 int i;
719
720 /* eid, dn, attr_name, attr_value */
721 if (col_num != 4)
722 return SQLITE_ABORT;
723
724 eid = atoll(cols[0]);
725
726 if (eid != ac->current_eid) { /* here begin a new entry */
727
728 /* call the async callback for the last entry
729 * except the first time */
730 if (ac->current_eid != 0) {
731 ac->ares->message = ldb_msg_canonicalize(ac->module->ldb, ac->ares->message);
732 if (ac->ares->message == NULL)
733 return SQLITE_ABORT;
734
735 handle->status = ac->callback(ac->module->ldb, ac->context, ac->ares);
736 if (handle->status != LDB_SUCCESS)
737 return SQLITE_ABORT;
738 }
739
740 /* start over */
741 ac->ares = talloc_zero(ac, struct ldb_reply);
742 if (!ac->ares)
743 return SQLITE_ABORT;
744
745 ac->ares->message = ldb_msg_new(ac->ares);
746 if (!ac->ares->message)
747 return SQLITE_ABORT;
748
749 ac->ares->type = LDB_REPLY_ENTRY;
750 ac->current_eid = eid;
751 }
752
753 msg = ac->ares->message;
754
755 if (msg->dn == NULL) {
756 msg->dn = ldb_dn_explode(msg, cols[1]);
757 if (msg->dn == NULL)
758 return SQLITE_ABORT;
759 }
760
761 if (ac->attrs) {
762 int found = 0;
763 for (i = 0; ac->attrs[i]; i++) {
764 if (strcasecmp(cols[2], ac->attrs[i]) == 0) {
765 found = 1;
766 break;
767 }
768 }
769 if (!found) return SQLITE_OK;
770 }
771
772 if (ldb_msg_add_string(msg, cols[2], cols[3]) != 0) {
773 return SQLITE_ABORT;
774 }
775
776 return SQLITE_OK;
777 }
778
779
780 /*
781 * lsqlite3_get_eid()
782 * lsqlite3_get_eid_ndn()
783 *
784 * These functions are used for the very common case of retrieving an EID value
785 * given a (normalized) DN.
786 */
787
788 static long long lsqlite3_get_eid_ndn(sqlite3 *sqlite, void *mem_ctx, const char *norm_dn)
789 {
790 char *errmsg;
791 char *query;
792 long long eid = -1;
793 long long ret;
794
795 /* get object eid */
796 query = lsqlite3_tprintf(mem_ctx, "SELECT eid "
797 "FROM ldb_entry "
798 "WHERE norm_dn = '%q';", norm_dn);
799 if (query == NULL) return -1;
800
801 ret = sqlite3_exec(sqlite, query, lsqlite3_eid_callback, &eid, &errmsg);
802 if (ret != SQLITE_OK) {
803 if (errmsg) {
804 printf("lsqlite3_get_eid: Fatal Error: %s\n", errmsg);
805 free(errmsg);
806 }
807 return -1;
808 }
809
810 return eid;
811 }
812
813 static long long lsqlite3_get_eid(struct ldb_module *module, const struct ldb_dn *dn)
814 {
815 TALLOC_CTX *local_ctx;
816 struct lsqlite3_private *lsqlite3 = module->private_data;
817 long long eid = -1;
818 char *cdn;
819
820 /* ignore ltdb specials */
821 if (ldb_dn_is_special(dn)) {
822 return -1;
823 }
824
825 /* create a local ctx */
826 local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_get_eid local context");
827 if (local_ctx == NULL) {
828 return -1;
829 }
830
831 cdn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, local_ctx, dn));
832 if (!cdn) goto done;
833
834 eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, local_ctx, cdn);
835
836 done:
837 talloc_free(local_ctx);
838 return eid;
839 }
840
841 /*
842 * Interface functions referenced by lsqlite3_ops
843 */
844
845 /* search for matching records, by tree */
846 int lsql_search(struct ldb_module *module, struct ldb_request *req)
847 {
848 struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
849 struct lsql_context *lsql_ac;
850 char *norm_basedn;
851 char *sqlfilter;
852 char *errmsg;
853 char *query = NULL;
854 int ret;
855
856 req->handle = init_handle(lsqlite3, module, req);
857 if (req->handle == NULL) {
858 return LDB_ERR_OPERATIONS_ERROR;
859 }
860
861 lsql_ac = talloc_get_type(req->handle->private_data, struct lsql_context);
862
863 if ((req->op.search.base == NULL || req->op.search.base->comp_num == 0) &&
864 (req->op.search.scope == LDB_SCOPE_BASE || req->op.search.scope == LDB_SCOPE_ONELEVEL))
865 return LDB_ERR_OPERATIONS_ERROR;
866
867 if (req->op.search.base) {
868 norm_basedn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, lsql_ac, req->op.search.base));
869 if (norm_basedn == NULL) {
870 ret = LDB_ERR_INVALID_DN_SYNTAX;
871 goto failed;
872 }
873 } else norm_basedn = talloc_strdup(lsql_ac, "");
874
875 /* Convert filter into a series of SQL conditions (constraints) */
876 sqlfilter = parsetree_to_sql(module, lsql_ac, req->op.search.tree);
877
878 switch(req->op.search.scope) {
879 case LDB_SCOPE_DEFAULT:
880 case LDB_SCOPE_SUBTREE:
881 if (*norm_basedn != '\0') {
882 query = lsqlite3_tprintf(lsql_ac,
883 "SELECT entry.eid,\n"
884 " entry.dn,\n"
885 " av.attr_name,\n"
886 " av.attr_value\n"
887 " FROM ldb_entry AS entry\n"
888
889 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
890 " ON av.eid = entry.eid\n"
891
892 " WHERE entry.eid IN\n"
893 " (SELECT DISTINCT ldb_entry.eid\n"
894 " FROM ldb_entry\n"
895 " WHERE (ldb_entry.norm_dn GLOB('*,%q')\n"
896 " OR ldb_entry.norm_dn = '%q')\n"
897 " AND ldb_entry.eid IN\n"
898 " (%s)\n"
899 " )\n"
900
901 " ORDER BY entry.eid ASC;",
902 norm_basedn,
903 norm_basedn,
904 sqlfilter);
905 } else {
906 query = lsqlite3_tprintf(lsql_ac,
907 "SELECT entry.eid,\n"
908 " entry.dn,\n"
909 " av.attr_name,\n"
910 " av.attr_value\n"
911 " FROM ldb_entry AS entry\n"
912
913 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
914 " ON av.eid = entry.eid\n"
915
916 " WHERE entry.eid IN\n"
917 " (SELECT DISTINCT ldb_entry.eid\n"
918 " FROM ldb_entry\n"
919 " WHERE ldb_entry.eid IN\n"
920 " (%s)\n"
921 " )\n"
922
923 " ORDER BY entry.eid ASC;",
924 sqlfilter);
925 }
926
927 break;
928
929 case LDB_SCOPE_BASE:
930 query = lsqlite3_tprintf(lsql_ac,
931 "SELECT entry.eid,\n"
932 " entry.dn,\n"
933 " av.attr_name,\n"
934 " av.attr_value\n"
935 " FROM ldb_entry AS entry\n"
936
937 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
938 " ON av.eid = entry.eid\n"
939
940 " WHERE entry.eid IN\n"
941 " (SELECT DISTINCT ldb_entry.eid\n"
942 " FROM ldb_entry\n"
943 " WHERE ldb_entry.norm_dn = '%q'\n"
944 " AND ldb_entry.eid IN\n"
945 " (%s)\n"
946 " )\n"
947
948 " ORDER BY entry.eid ASC;",
949 norm_basedn,
950 sqlfilter);
951 break;
952
953 case LDB_SCOPE_ONELEVEL:
954 query = lsqlite3_tprintf(lsql_ac,
955 "SELECT entry.eid,\n"
956 " entry.dn,\n"
957 " av.attr_name,\n"
958 " av.attr_value\n"
959 " FROM ldb_entry AS entry\n"
960
961 " LEFT OUTER JOIN ldb_attribute_values AS av\n"
962 " ON av.eid = entry.eid\n"
963
964 " WHERE entry.eid IN\n"
965 " (SELECT DISTINCT ldb_entry.eid\n"
966 " FROM ldb_entry\n"
967 " WHERE norm_dn GLOB('*,%q')\n"
968 " AND NOT norm_dn GLOB('*,*,%q')\n"
969 " AND ldb_entry.eid IN\n(%s)\n"
970 " )\n"
971
972 " ORDER BY entry.eid ASC;",
973 norm_basedn,
974 norm_basedn,
975 sqlfilter);
976 break;
977 }
978
979 if (query == NULL) {
980 goto failed;
981 }
982
983 /* * /
984 printf ("%s\n", query);
985 / * */
986
987 lsql_ac->current_eid = 0;
988 lsql_ac->attrs = req->op.search.attrs;
989 lsql_ac->ares = NULL;
990
991 req->handle->state = LDB_ASYNC_PENDING;
992
993 ret = sqlite3_exec(lsqlite3->sqlite, query, lsqlite3_search_callback, req->handle, &errmsg);
994 if (ret != SQLITE_OK) {
995 if (errmsg) {
996 ldb_set_errstring(module->ldb, errmsg);
997 free(errmsg);
998 }
999 goto failed;
1000 }
1001
1002 /* complete the last message if any */
1003 if (lsql_ac->ares) {
1004 lsql_ac->ares->message = ldb_msg_canonicalize(module->ldb, lsql_ac->ares->message);
1005 if (lsql_ac->ares->message == NULL)
1006 goto failed;
1007
1008 req->handle->status = lsql_ac->callback(module->ldb, lsql_ac->context, lsql_ac->ares);
1009 if (req->handle->status != LDB_SUCCESS)
1010 goto failed;
1011 }
1012
1013 req->handle->state = LDB_ASYNC_DONE;
1014
1015 return LDB_SUCCESS;
1016
1017 failed:
1018 return LDB_ERR_OPERATIONS_ERROR;
1019 }
1020
1021 /* add a record */
1022 static int lsql_add(struct ldb_module *module, struct ldb_request *req)
1023 {
1024 struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1025 struct lsql_context *lsql_ac;
1026 struct ldb_message *msg = req->op.add.message;
1027 long long eid;
1028 char *dn, *ndn;
1029 char *errmsg;
1030 char *query;
1031 int i;
1032 int ret = LDB_SUCCESS;
1033
1034 req->handle = init_handle(lsqlite3, module, req);
1035 if (req->handle == NULL) {
1036 return LDB_ERR_OPERATIONS_ERROR;
1037 }
1038 lsql_ac = talloc_get_type(req->handle->private_data, struct lsql_context);
1039 req->handle->state = LDB_ASYNC_DONE;
1040 req->handle->status = LDB_SUCCESS;
1041
1042 /* See if this is an ltdb special */
1043 if (ldb_dn_is_special(msg->dn)) {
1044 struct ldb_dn *c;
1045
1046 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1047 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1048 #warning "insert subclasses into object class tree"
1049 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1050 goto done;
1051 }
1052
1053 /*
1054 c = ldb_dn_explode(local_ctx, "@INDEXLIST");
1055 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1056 #warning "should we handle indexes somehow ?"
1057 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1058 goto done;
1059 }
1060 */
1061 /* Others return an error */
1062 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1063 goto done;
1064 }
1065
1066 /* create linearized and normalized dns */
1067 dn = ldb_dn_linearize(lsql_ac, msg->dn);
1068 ndn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, lsql_ac, msg->dn));
1069 if (dn == NULL || ndn == NULL) {
1070 ret = LDB_ERR_OTHER;
1071 goto done;
1072 }
1073
1074 query = lsqlite3_tprintf(lsql_ac,
1075 /* Add new entry */
1076 "INSERT OR ABORT INTO ldb_entry "
1077 "('dn', 'norm_dn') "
1078 "VALUES ('%q', '%q');",
1079 dn, ndn);
1080 if (query == NULL) {
1081 ret = LDB_ERR_OTHER;
1082 goto done;
1083 }
1084
1085 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1086 if (ret != SQLITE_OK) {
1087 if (errmsg) {
1088 ldb_set_errstring(module->ldb, errmsg);
1089 free(errmsg);
1090 }
1091 ret = LDB_ERR_OTHER;
1092 goto done;
1093 }
1094
1095 eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, lsql_ac, ndn);
1096 if (eid == -1) {
1097 ret = LDB_ERR_OTHER;
1098 goto done;
1099 }
1100
1101 for (i = 0; i < msg->num_elements; i++) {
1102 const struct ldb_message_element *el = &msg->elements[i];
1103 const struct ldb_attrib_handler *h;
1104 char *attr;
1105 int j;
1106
1107 /* Get a case-folded copy of the attribute name */
1108 attr = ldb_attr_casefold(lsql_ac, el->name);
1109 if (attr == NULL) {
1110 ret = LDB_ERR_OTHER;
1111 goto done;
1112 }
1113
1114 h = ldb_attrib_handler(module->ldb, el->name);
1115
1116 /* For each value of the specified attribute name... */
1117 for (j = 0; j < el->num_values; j++) {
1118 struct ldb_val value;
1119 char *insert;
1120
1121 /* Get a canonicalised copy of the data */
1122 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1123 if (value.data == NULL) {
1124 ret = LDB_ERR_OTHER;
1125 goto done;
1126 }
1127
1128 insert = lsqlite3_tprintf(lsql_ac,
1129 "INSERT OR ROLLBACK INTO ldb_attribute_values "
1130 "('eid', 'attr_name', 'norm_attr_name',"
1131 " 'attr_value', 'norm_attr_value') "
1132 "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1133 eid, el->name, attr,
1134 el->values[j].data, value.data);
1135 if (insert == NULL) {
1136 ret = LDB_ERR_OTHER;
1137 goto done;
1138 }
1139
1140 ret = sqlite3_exec(lsqlite3->sqlite, insert, NULL, NULL, &errmsg);
1141 if (ret != SQLITE_OK) {
1142 if (errmsg) {
1143 ldb_set_errstring(module->ldb, errmsg);
1144 free(errmsg);
1145 }
1146 ret = LDB_ERR_OTHER;
1147 goto done;
1148 }
1149 }
1150 }
1151
1152 if (lsql_ac->callback) {
1153 req->handle->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1154 }
1155
1156 done:
1157 req->handle->state = LDB_ASYNC_DONE;
1158 return ret;
1159 }
1160
1161 /* modify a record */
1162 static int lsql_modify(struct ldb_module *module, struct ldb_request *req)
1163 {
1164 struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1165 struct lsql_context *lsql_ac;
1166 struct ldb_message *msg = req->op.mod.message;
1167 long long eid;
1168 char *errmsg;
1169 int i;
1170 int ret = LDB_SUCCESS;
1171
1172 req->handle = init_handle(lsqlite3, module, req);
1173 if (req->handle == NULL) {
1174 return LDB_ERR_OPERATIONS_ERROR;
1175 }
1176 lsql_ac = talloc_get_type(req->handle->private_data, struct lsql_context);
1177 req->handle->state = LDB_ASYNC_DONE;
1178 req->handle->status = LDB_SUCCESS;
1179
1180 /* See if this is an ltdb special */
1181 if (ldb_dn_is_special(msg->dn)) {
1182 struct ldb_dn *c;
1183
1184 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1185 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1186 #warning "modify subclasses into object class tree"
1187 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1188 goto done;
1189 }
1190
1191 /* Others return an error */
1192 ret = LDB_ERR_UNWILLING_TO_PERFORM;
1193 goto done;
1194 }
1195
1196 eid = lsqlite3_get_eid(module, msg->dn);
1197 if (eid == -1) {
1198 ret = LDB_ERR_OTHER;
1199 goto done;
1200 }
1201
1202 for (i = 0; i < msg->num_elements; i++) {
1203 const struct ldb_message_element *el = &msg->elements[i];
1204 const struct ldb_attrib_handler *h;
1205 int flags = el->flags & LDB_FLAG_MOD_MASK;
1206 char *attr;
1207 char *mod;
1208 int j;
1209
1210 /* Get a case-folded copy of the attribute name */
1211 attr = ldb_attr_casefold(lsql_ac, el->name);
1212 if (attr == NULL) {
1213 ret = LDB_ERR_OTHER;
1214 goto done;
1215 }
1216
1217 h = ldb_attrib_handler(module->ldb, el->name);
1218
1219 switch (flags) {
1220
1221 case LDB_FLAG_MOD_REPLACE:
1222
1223 /* remove all attributes before adding the replacements */
1224 mod = lsqlite3_tprintf(lsql_ac,
1225 "DELETE FROM ldb_attribute_values "
1226 "WHERE eid = '%lld' "
1227 "AND norm_attr_name = '%q';",
1228 eid, attr);
1229 if (mod == NULL) {
1230 ret = LDB_ERR_OTHER;
1231 goto done;
1232 }
1233
1234 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1235 if (ret != SQLITE_OK) {
1236 if (errmsg) {
1237 ldb_set_errstring(module->ldb, errmsg);
1238 free(errmsg);
1239 }
1240 ret = LDB_ERR_OTHER;
1241 goto done;
1242 }
1243
1244 /* MISSING break is INTENTIONAL */
1245
1246 case LDB_FLAG_MOD_ADD:
1247 #warning "We should throw an error if no value is provided!"
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 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1254 if (value.data == NULL) {
1255 ret = LDB_ERR_OTHER;
1256 goto done;
1257 }
1258
1259 mod = lsqlite3_tprintf(lsql_ac,
1260 "INSERT OR ROLLBACK INTO ldb_attribute_values "
1261 "('eid', 'attr_name', 'norm_attr_name',"
1262 " 'attr_value', 'norm_attr_value') "
1263 "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1264 eid, el->name, attr,
1265 el->values[j].data, value.data);
1266
1267 if (mod == NULL) {
1268 ret = LDB_ERR_OTHER;
1269 goto done;
1270 }
1271
1272 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1273 if (ret != SQLITE_OK) {
1274 if (errmsg) {
1275 ldb_set_errstring(module->ldb, errmsg);
1276 free(errmsg);
1277 }
1278 ret = LDB_ERR_OTHER;
1279 goto done;
1280 }
1281 }
1282
1283 break;
1284
1285 case LDB_FLAG_MOD_DELETE:
1286 #warning "We should throw an error if the attribute we are trying to delete does not exist!"
1287 if (el->num_values == 0) {
1288 mod = lsqlite3_tprintf(lsql_ac,
1289 "DELETE FROM ldb_attribute_values "
1290 "WHERE eid = '%lld' "
1291 "AND norm_attr_name = '%q';",
1292 eid, attr);
1293 if (mod == NULL) {
1294 ret = LDB_ERR_OTHER;
1295 goto done;
1296 }
1297
1298 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1299 if (ret != SQLITE_OK) {
1300 if (errmsg) {
1301 ldb_set_errstring(module->ldb, errmsg);
1302 free(errmsg);
1303 }
1304 ret = LDB_ERR_OTHER;
1305 goto done;
1306 }
1307 }
1308
1309 /* For each value of the specified attribute name... */
1310 for (j = 0; j < el->num_values; j++) {
1311 struct ldb_val value;
1312
1313 /* Get a canonicalised copy of the data */
1314 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1315 if (value.data == NULL) {
1316 ret = LDB_ERR_OTHER;
1317 goto done;
1318 }
1319
1320 mod = lsqlite3_tprintf(lsql_ac,
1321 "DELETE FROM ldb_attribute_values "
1322 "WHERE eid = '%lld' "
1323 "AND norm_attr_name = '%q' "
1324 "AND norm_attr_value = '%q';",
1325 eid, attr, value.data);
1326
1327 if (mod == NULL) {
1328 ret = LDB_ERR_OTHER;
1329 goto done;
1330 }
1331
1332 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1333 if (ret != SQLITE_OK) {
1334 if (errmsg) {
1335 ldb_set_errstring(module->ldb, errmsg);
1336 free(errmsg);
1337 }
1338 ret = LDB_ERR_OTHER;
1339 goto done;
1340 }
1341 }
1342
1343 break;
1344 }
1345 }
1346
1347 if (lsql_ac->callback) {
1348 req->handle->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1349 }
1350
1351 done:
1352 req->handle->state = LDB_ASYNC_DONE;
1353 return ret;
1354 }
1355
1356 /* delete a record */
1357 static int lsql_delete(struct ldb_module *module, struct ldb_request *req)
1358 {
1359 struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1360 struct lsql_context *lsql_ac;
1361 long long eid;
1362 char *errmsg;
1363 char *query;
1364 int ret = LDB_SUCCESS;
1365
1366
1367 req->handle = init_handle(lsqlite3, module, req);
1368 if (req->handle == NULL) {
1369 return LDB_ERR_OPERATIONS_ERROR;
1370 }
1371 lsql_ac = talloc_get_type(req->handle->private_data, struct lsql_context);
1372 req->handle->state = LDB_ASYNC_DONE;
1373 req->handle->status = LDB_SUCCESS;
1374
1375 eid = lsqlite3_get_eid(module, req->op.del.dn);
1376 if (eid == -1) {
1377 goto done;
1378 }
1379
1380 query = lsqlite3_tprintf(lsql_ac,
1381 /* Delete entry */
1382 "DELETE FROM ldb_entry WHERE eid = %lld; "
1383 /* Delete attributes */
1384 "DELETE FROM ldb_attribute_values WHERE eid = %lld; ",
1385 eid, eid);
1386 if (query == NULL) {
1387 ret = LDB_ERR_OTHER;
1388 goto done;
1389 }
1390
1391 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1392 if (ret != SQLITE_OK) {
1393 if (errmsg) {
1394 ldb_set_errstring(module->ldb, errmsg);
1395 free(errmsg);
1396 }
1397 req->handle->status = LDB_ERR_OPERATIONS_ERROR;
1398 goto done;
1399 }
1400
1401 if (lsql_ac->callback) {
1402 ret = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1403 }
1404
1405 done:
1406 req->handle->state = LDB_ASYNC_DONE;
1407 return ret;
1408 }
1409
1410 /* rename a record */
1411 static int lsql_rename(struct ldb_module *module, struct ldb_request *req)
1412 {
1413 struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1414 struct lsql_context *lsql_ac;
1415 char *new_dn, *new_cdn, *old_cdn;
1416 char *errmsg;
1417 char *query;
1418 int ret = LDB_SUCCESS;
1419
1420 req->handle = init_handle(lsqlite3, module, req);
1421 if (req->handle == NULL) {
1422 return LDB_ERR_OPERATIONS_ERROR;
1423 }
1424 lsql_ac = talloc_get_type(req->handle->private_data, struct lsql_context);
1425 req->handle->state = LDB_ASYNC_DONE;
1426 req->handle->status = LDB_SUCCESS;
1427
1428 /* create linearized and normalized dns */
1429 old_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, lsql_ac, req->op.rename.olddn));
1430 new_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, lsql_ac, req->op.rename.newdn));
1431 new_dn = ldb_dn_linearize(lsql_ac, req->op.rename.newdn);
1432 if (old_cdn == NULL || new_cdn == NULL || new_dn == NULL) {
1433 goto done;
1434 }
1435
1436 /* build the SQL query */
1437 query = lsqlite3_tprintf(lsql_ac,
1438 "UPDATE ldb_entry SET dn = '%q', norm_dn = '%q' "
1439 "WHERE norm_dn = '%q';",
1440 new_dn, new_cdn, old_cdn);
1441 if (query == NULL) {
1442 goto done;
1443 }
1444
1445 /* execute */
1446 ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1447 if (ret != SQLITE_OK) {
1448 if (errmsg) {
1449 ldb_set_errstring(module->ldb, errmsg);
1450 free(errmsg);
1451 }
1452 ret = LDB_ERR_OPERATIONS_ERROR;
1453 goto done;
1454 }
1455
1456 if (lsql_ac->callback) {
1457 ret = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1458 }
1459
1460 done:
1461 req->handle->state = LDB_ASYNC_DONE;
1462 return ret;
1463 }
1464
1465 static int lsql_start_trans(struct ldb_module * module)
1466 {
1467 int ret;
1468 char *errmsg;
1469 struct lsqlite3_private * lsqlite3 = module->private_data;
1470
1471 if (lsqlite3->trans_count == 0) {
1472 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN IMMEDIATE;", NULL, NULL, &errmsg);
1473 if (ret != SQLITE_OK) {
1474 if (errmsg) {
1475 printf("lsqlite3_start_trans: error: %s\n", errmsg);
1476 free(errmsg);
1477 }
1478 return -1;
1479 }
1480 };
1481
1482 lsqlite3->trans_count++;
1483
1484 return 0;
1485 }
1486
1487 static int lsql_end_trans(struct ldb_module *module)
1488 {
1489 int ret;
1490 char *errmsg;
1491 struct lsqlite3_private *lsqlite3 = module->private_data;
1492
1493 if (lsqlite3->trans_count > 0) {
1494 lsqlite3->trans_count--;
1495 } else return -1;
1496
1497 if (lsqlite3->trans_count == 0) {
1498 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1499 if (ret != SQLITE_OK) {
1500 if (errmsg) {
1501 printf("lsqlite3_end_trans: error: %s\n", errmsg);
1502 free(errmsg);
1503 }
1504 return -1;
1505 }
1506 }
1507
1508 return 0;
1509 }
1510
1511 static int lsql_del_trans(struct ldb_module *module)
1512 {
1513 struct lsqlite3_private *lsqlite3 = module->private_data;
1514
1515 if (lsqlite3->trans_count > 0) {
1516 lsqlite3->trans_count--;
1517 } else return -1;
1518
1519 if (lsqlite3->trans_count == 0) {
1520 return lsqlite3_safe_rollback(lsqlite3->sqlite);
1521 }
1522
1523 return -1;
1524 }
1525
1526 static int destructor(struct lsqlite3_private *lsqlite3)
1527 {
1528 if (lsqlite3->sqlite) {
1529 sqlite3_close(lsqlite3->sqlite);
1530 }
1531 return 0;
1532 }
1533
1534 static int lsql_request(struct ldb_module *module, struct ldb_request *req)
1535 {
1536 return LDB_ERR_OPERATIONS_ERROR;
1537 }
1538
1539 static int lsql_wait(struct ldb_handle *handle, enum ldb_wait_type type)
1540 {
1541 return handle->status;
1542 }
1543
1544 /*
1545 * Table of operations for the sqlite3 backend
1546 */
1547 static const struct ldb_module_ops lsqlite3_ops = {
1548 .name = "sqlite",
1549 .search = lsql_search,
1550 .add = lsql_add,
1551 .modify = lsql_modify,
1552 .del = lsql_delete,
1553 .rename = lsql_rename,
1554 .request = lsql_request,
1555 .start_transaction = lsql_start_trans,
1556 .end_transaction = lsql_end_trans,
1557 .del_transaction = lsql_del_trans,
1558 .wait = lsql_wait,
1559 };
1560
1561 /*
1562 * Static functions
1563 */
1564
1565 static int initialize(struct lsqlite3_private *lsqlite3,
1566 struct ldb_context *ldb, const char *url, int flags)
1567 {
1568 TALLOC_CTX *local_ctx;
1569 long long queryInt;
1570 int rollback = 0;
1571 char *errmsg;
1572 char *schema;
1573 int ret;
1574
1575 /* create a local ctx */
1576 local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context");
1577 if (local_ctx == NULL) {
1578 return -1;
1579 }
1580
1581 schema = lsqlite3_tprintf(local_ctx,
1582
1583
1584 "CREATE TABLE ldb_info AS "
1585 " SELECT 'LDB' AS database_type,"
1586 " '1.0' AS version;"
1587
1588 /*
1589 * The entry table holds the information about an entry.
1590 * This table is used to obtain the EID of the entry and to
1591 * support scope=one and scope=base. The parent and child
1592 * table is included in the entry table since all the other
1593 * attributes are dependent on EID.
1594 */
1595 "CREATE TABLE ldb_entry "
1596 "("
1597 " eid INTEGER PRIMARY KEY AUTOINCREMENT,"
1598 " dn TEXT UNIQUE NOT NULL,"
1599 " norm_dn TEXT UNIQUE NOT NULL"
1600 ");"
1601
1602
1603 "CREATE TABLE ldb_object_classes"
1604 "("
1605 " class_name TEXT PRIMARY KEY,"
1606 " parent_class_name TEXT,"
1607 " tree_key TEXT UNIQUE,"
1608 " max_child_num INTEGER DEFAULT 0"
1609 ");"
1610
1611 /*
1612 * We keep a full listing of attribute/value pairs here
1613 */
1614 "CREATE TABLE ldb_attribute_values"
1615 "("
1616 " eid INTEGER REFERENCES ldb_entry,"
1617 " attr_name TEXT,"
1618 " norm_attr_name TEXT,"
1619 " attr_value TEXT,"
1620 " norm_attr_value TEXT "
1621 ");"
1622
1623
1624 /*
1625 * Indexes
1626 */
1627 "CREATE INDEX ldb_attribute_values_eid_idx "
1628 " ON ldb_attribute_values (eid);"
1629
1630 "CREATE INDEX ldb_attribute_values_name_value_idx "
1631 " ON ldb_attribute_values (attr_name, norm_attr_value);"
1632
1633
1634
1635 /*
1636 * Triggers
1637 */
1638
1639 "CREATE TRIGGER ldb_object_classes_insert_tr"
1640 " AFTER INSERT"
1641 " ON ldb_object_classes"
1642 " FOR EACH ROW"
1643 " BEGIN"
1644 " UPDATE ldb_object_classes"
1645 " SET tree_key = COALESCE(tree_key, "
1646 " ("
1647 " SELECT tree_key || "
1648 " (SELECT base160(max_child_num + 1)"
1649 " FROM ldb_object_classes"
1650 " WHERE class_name = "
1651 " new.parent_class_name)"
1652 " FROM ldb_object_classes "
1653 " WHERE class_name = new.parent_class_name "
1654 " ));"
1655 " UPDATE ldb_object_classes "
1656 " SET max_child_num = max_child_num + 1"
1657 " WHERE class_name = new.parent_class_name;"
1658 " END;"
1659
1660 /*
1661 * Table initialization
1662 */
1663
1664 "INSERT INTO ldb_object_classes "
1665 " (class_name, tree_key) "
1666 " VALUES "
1667 " ('TOP', '0001');");
1668
1669 /* Skip protocol indicator of url */
1670 if (strncmp(url, "sqlite3://", 10) != 0) {
1671 return SQLITE_MISUSE;
1672 }
1673
1674 /* Update pointer to just after the protocol indicator */
1675 url += 10;
1676
1677 /* Try to open the (possibly empty/non-existent) database */
1678 if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) {
1679 return ret;
1680 }
1681
1682 /* In case this is a new database, enable auto_vacuum */
1683 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA auto_vacuum = 1;", NULL, NULL, &errmsg);
1684 if (ret != SQLITE_OK) {
1685 if (errmsg) {
1686 printf("lsqlite3 initializaion error: %s\n", errmsg);
1687 free(errmsg);
1688 }
1689 goto failed;
1690 }
1691
1692 if (flags & LDB_FLG_NOSYNC) {
1693 /* DANGEROUS */
1694 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA synchronous = OFF;", NULL, NULL, &errmsg);
1695 if (ret != SQLITE_OK) {
1696 if (errmsg) {
1697 printf("lsqlite3 initializaion error: %s\n", errmsg);
1698 free(errmsg);
1699 }
1700 goto failed;
1701 }
1702 }
1703
1704 /* */
1705
1706 /* Establish a busy timeout of 30 seconds */
1707 if ((ret = sqlite3_busy_timeout(lsqlite3->sqlite,
1708 30000)) != SQLITE_OK) {
1709 return ret;
1710 }
1711
1712 /* Create a function, callable from sql, to increment a tree_key */
1713 if ((ret =
1714 sqlite3_create_function(lsqlite3->sqlite,/* handle */
1715 "base160_next", /* function name */
1716 1, /* number of args */
1717 SQLITE_ANY, /* preferred text type */
1718 NULL, /* user data */
1719 base160next_sql, /* called func */
1720 NULL, /* step func */
1721 NULL /* final func */
1722 )) != SQLITE_OK) {
1723 return ret;
1724 }
1725
1726 /* Create a function, callable from sql, to convert int to base160 */
1727 if ((ret =
1728 sqlite3_create_function(lsqlite3->sqlite,/* handle */
1729 "base160", /* function name */
1730 1, /* number of args */
1731 SQLITE_ANY, /* preferred text type */
1732 NULL, /* user data */
1733 base160_sql, /* called func */
1734 NULL, /* step func */
1735 NULL /* final func */
1736 )) != SQLITE_OK) {
1737 return ret;
1738 }
1739
1740 /* Create a function, callable from sql, to perform various comparisons */
1741 if ((ret =
1742 sqlite3_create_function(lsqlite3->sqlite, /* handle */
1743 "ldap_compare", /* function name */
1744 4, /* number of args */
1745 SQLITE_ANY, /* preferred text type */
1746 ldb , /* user data */
1747 lsqlite3_compare, /* called func */
1748 NULL, /* step func */
1749 NULL /* final func */
1750 )) != SQLITE_OK) {
1751 return ret;
1752 }
1753
1754 /* Begin a transaction */
1755 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg);
1756 if (ret != SQLITE_OK) {
1757 if (errmsg) {
1758 printf("lsqlite3: initialization error: %s\n", errmsg);
1759 free(errmsg);
1760 }
1761 goto failed;
1762 }
1763 rollback = 1;
1764
1765 /* Determine if this is a new database. No tables means it is. */
1766 if (query_int(lsqlite3,
1767 &queryInt,
1768 "SELECT COUNT(*)\n"
1769 " FROM sqlite_master\n"
1770 " WHERE type = 'table';") != 0) {
1771 goto failed;
1772 }
1773
1774 if (queryInt == 0) {
1775 /*
1776 * Create the database schema
1777 */
1778 ret = sqlite3_exec(lsqlite3->sqlite, schema, NULL, NULL, &errmsg);
1779 if (ret != SQLITE_OK) {
1780 if (errmsg) {
1781 printf("lsqlite3 initializaion error: %s\n", errmsg);
1782 free(errmsg);
1783 }
1784 goto failed;
1785 }
1786 } else {
1787 /*
1788 * Ensure that the database we opened is one of ours
1789 */
1790 if (query_int(lsqlite3,
1791 &queryInt,
1792 "SELECT "
1793 " (SELECT COUNT(*) = 2"
1794 " FROM sqlite_master "
1795 " WHERE type = 'table' "
1796 " AND name IN "
1797 " ("
1798 " 'ldb_entry', "
1799 " 'ldb_object_classes' "
1800 " ) "
1801 " ) "
1802 " AND "
1803 " (SELECT 1 "
1804 " FROM ldb_info "
1805 " WHERE database_type = 'LDB' "
1806 " AND version = '1.0'"
1807 " );") != 0 ||
1808 queryInt != 1) {
1809
1810 /* It's not one that we created. See ya! */
1811 goto failed;
1812 }
1813 }
1814
1815 /* Commit the transaction */
1816 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1817 if (ret != SQLITE_OK) {
1818 if (errmsg) {
1819 printf("lsqlite3: iniialization error: %s\n", errmsg);
1820 free(errmsg);
1821 }
1822 goto failed;
1823 }
1824
1825 return SQLITE_OK;
1826
1827 failed:
1828 if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite);
1829 sqlite3_close(lsqlite3->sqlite);
1830 return -1;
1831 }
1832
1833 /*
1834 * connect to the database
1835 */
1836 static int lsqlite3_connect(struct ldb_context *ldb,
1837 const char *url,
1838 unsigned int flags,
1839 const char *options[],
1840 struct ldb_module **module)
1841 {
1842 int i;
1843 int ret;
1844 struct lsqlite3_private * lsqlite3 = NULL;
1845
1846 lsqlite3 = talloc(ldb, struct lsqlite3_private);
1847 if (!lsqlite3) {
1848 goto failed;
1849 }
1850
1851 lsqlite3->sqlite = NULL;
1852 lsqlite3->options = NULL;
1853 lsqlite3->trans_count = 0;
1854
1855 ret = initialize(lsqlite3, ldb, url, flags);
1856 if (ret != SQLITE_OK) {
1857 goto failed;
1858 }
1859
1860 talloc_set_destructor(lsqlite3, destructor);
1861
1862
1863
1864 *module = talloc(ldb, struct ldb_module);
1865 if (!module) {
1866 ldb_oom(ldb);
1867 goto failed;
1868 }
1869 talloc_set_name_const(*module, "ldb_sqlite3 backend");
1870 (*module)->ldb = ldb;
1871 (*module)->prev = (*module)->next = NULL;
1872 (*module)->private_data = lsqlite3;
1873 (*module)->ops = &lsqlite3_ops;
1874
1875 if (options) {
1876 /*
1877 * take a copy of the options array, so we don't have to rely
1878 * on the caller keeping it around (it might be dynamic)
1879 */
1880 for (i=0;options[i];i++) ;
1881
1882 lsqlite3->options = talloc_array(lsqlite3, char *, i+1);
1883 if (!lsqlite3->options) {
1884 goto failed;
1885 }
1886
1887 for (i=0;options[i];i++) {
1888
1889 lsqlite3->options[i+1] = NULL;
1890 lsqlite3->options[i] =
1891 talloc_strdup(lsqlite3->options, options[i]);
1892 if (!lsqlite3->options[i]) {
1893 goto failed;
1894 }
1895 }
1896 }
1897
1898 return 0;
1899
1900 failed:
1901 if (lsqlite3->sqlite != NULL) {
1902 (void) sqlite3_close(lsqlite3->sqlite);
1903 }
1904 talloc_free(lsqlite3);
1905 return -1;
1906 }
1907
1908 int ldb_sqlite3_init(void)
1909 {
1910 return ldb_register_backend("sqlite3", lsqlite3_connect);
1911 }
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