source3/lib/ldb/ldb_sqlite3/ldb_sqlite3.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Derrell Lipman  2005
   5    Copyright (C) Simo Sorce 2005
   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 2 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, write to the Free Software
  23    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24 */
  25
  26 /*
  27  *  Name: ldb
  28  *
  29  *  Component: ldb sqlite3 backend
  30  *
  31  *  Description: core files for SQLITE3 backend
  32  *
  33  *  Author: Derrell Lipman (based on Andrew Tridgell's LDAP backend)
  34  */
  35
  36 #include "includes.h"
  37 #include "ldb/include/includes.h"
  38
  39 #include <sqlite3.h>
  40
  41 struct lsqlite3_private {
  42         int trans_count;
  43         char **options;
  44         sqlite3 *sqlite;
  45 };
  46
  47 struct lsql_context {
  48         struct ldb_module *module;
  49
  50         /* search stuff */
  51         long long current_eid;
  52         const char * const * attrs;
  53         struct ldb_reply *ares;
  54
  55         /* async stuff */
  56         void *context;
  57         int (*callback)(struct ldb_context *, void *, struct ldb_reply *);
  58 };
  59
  60 static struct ldb_handle *init_handle(struct lsqlite3_private *lsqlite3, struct ldb_module *module,
  61                                             void *context,
  62                                             int (*callback)(struct ldb_context *, void *, struct ldb_reply *))
  63 {
  64         struct lsql_context *ac;
  65         struct ldb_handle *h;
  66
  67         h = talloc_zero(lsqlite3, struct ldb_handle);
  68         if (h == NULL) {
  69                 ldb_set_errstring(module->ldb, "Out of Memory");
  70                 return NULL;
  71         }
  72
  73         h->module = module;
  74
  75         ac = talloc(h, struct lsql_context);
  76         if (ac == NULL) {
  77                 ldb_set_errstring(module->ldb, "Out of Memory");
  78                 talloc_free(h);
  79                 return NULL;
  80         }
  81
  82         h->private_data = (void *)ac;
  83
  84         h->state = LDB_ASYNC_INIT;
  85         h->status = LDB_SUCCESS;
  86
  87         ac->module = module;
  88         ac->context = context;
  89         ac->callback = callback;
  90
  91         return h;
  92 }
  93
  94 /*
  95  * Macros used throughout
  96  */
  97
  98 #ifndef FALSE
  99 # define FALSE  (0)
 100 # define TRUE   (! FALSE)
 101 #endif
 102
 103 #define RESULT_ATTR_TABLE       "temp_result_attrs"
 104
 105 //#define TEMPTAB                 /* for testing, create non-temporary table */
 106 #define TEMPTAB                 "TEMPORARY"
 107
 108 /*
 109  * Static variables
 110  */
 111 sqlite3_stmt *  stmtGetEID = NULL;
 112
 113 static char *lsqlite3_tprintf(TALLOC_CTX *mem_ctx, const char *fmt, ...)
 114 {
 115         char *str, *ret;
 116         va_list ap;
 117
 118         va_start(ap, fmt);
 119         str = sqlite3_vmprintf(fmt, ap);
 120         va_end(ap);
 121
 122         if (str == NULL) return NULL;
 123
 124         ret = talloc_strdup(mem_ctx, str);
 125         if (ret == NULL) {
 126                 sqlite3_free(str);
 127                 return NULL;
 128         }
 129
 130         sqlite3_free(str);
 131         return ret;
 132 }
 133
 134 static char base160tab[161] = {
 135         48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 , /* 0-9 */
 136         58 ,59 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 , /* : ; A-H */
 137         73 ,74 ,75 ,76 ,77 ,78 ,79 ,80 ,81 ,82 , /* I-R */
 138         83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,97 ,98 , /* S-Z , a-b */
 139         99 ,100,101,102,103,104,105,106,107,108, /* c-l */
 140         109,110,111,112,113,114,115,116,117,118, /* m-v */
 141         119,120,121,122,160,161,162,163,164,165, /* w-z, latin1 */
 142         166,167,168,169,170,171,172,173,174,175, /* latin1 */
 143         176,177,178,179,180,181,182,183,184,185, /* latin1 */
 144         186,187,188,189,190,191,192,193,194,195, /* latin1 */
 145         196,197,198,199,200,201,202,203,204,205, /* latin1 */
 146         206,207,208,209,210,211,212,213,214,215, /* latin1 */
 147         216,217,218,219,220,221,222,223,224,225, /* latin1 */
 148         226,227,228,229,230,231,232,233,234,235, /* latin1 */
 149         236,237,238,239,240,241,242,243,244,245, /* latin1 */
 150         246,247,248,249,250,251,252,253,254,255, /* latin1 */
 151         '\0'
 152 };
 153
 154
 155 /*
 156  * base160()
 157  *
 158  * Convert an unsigned long integer into a base160 representation of the
 159  * number.
 160  *
 161  * Parameters:
 162  *   val --
 163  *     value to be converted
 164  *
 165  *   result --
 166  *     character array, 5 bytes long, into which the base160 representation
 167  *     will be placed.  The result will be a four-digit representation of the
 168  *     number (with leading zeros prepended as necessary), and null
 169  *     terminated.
 170  *
 171  * Returns:
 172  *   Nothing
 173  */
 174 static void
 175 base160_sql(sqlite3_context * hContext,
 176             int argc,
 177             sqlite3_value ** argv)
 178 {
 179     int             i;
 180     long long       val;
 181     char            result[5];
 182
 183     val = sqlite3_value_int64(argv[0]);
 184
 185     for (i = 3; i >= 0; i--) {
 186
 187         result[i] = base160tab[val % 160];
 188         val /= 160;
 189     }
 190
 191     result[4] = '\0';
 192
 193     sqlite3_result_text(hContext, result, -1, SQLITE_TRANSIENT);
 194 }
 195
 196
 197 /*
 198  * base160next_sql()
 199  *
 200  * This function enhances sqlite by adding a "base160_next()" function which is
 201  * accessible via queries.
 202  *
 203  * Retrieve the next-greater number in the base160 sequence for the terminal
 204  * tree node (the last four digits).  Only one tree level (four digits) is
 205  * operated on.
 206  *
 207  * Input:
 208  *   A character string: either an empty string (in which case no operation is
 209  *   performed), or a string of base160 digits with a length of a multiple of
 210  *   four digits.
 211  *
 212  * Output:
 213  *   Upon return, the trailing four digits (one tree level) will have been
 214  *   incremented by 1.
 215  */
 216 static void
 217 base160next_sql(sqlite3_context * hContext,
 218                 int argc,
 219                 sqlite3_value ** argv)
 220 {
 221         int                         i;
 222         int                         len;
 223         char *             pTab;
 224         char *             pBase160 = strdup((const char *)sqlite3_value_text(argv[0]));
 225         char *             pStart = pBase160;
 226
 227         /*
 228          * We need a minimum of four digits, and we will always get a multiple
 229          * of four digits.
 230          */
 231         if (pBase160 != NULL &&
 232             (len = strlen(pBase160)) >= 4 &&
 233             len % 4 == 0) {
 234
 235                 if (pBase160 == NULL) {
 236
 237                         sqlite3_result_null(hContext);
 238                         return;
 239                 }
 240
 241                 pBase160 += strlen(pBase160) - 1;
 242
 243                 /* We only carry through four digits: one level in the tree */
 244                 for (i = 0; i < 4; i++) {
 245
 246                         /* What base160 value does this digit have? */
 247                         pTab = strchr(base160tab, *pBase160);
 248
 249                         /* Is there a carry? */
 250                         if (pTab < base160tab + sizeof(base160tab) - 1) {
 251
 252                                 /*
 253                                  * Nope.  Just increment this value and we're
 254                                  * done.
 255                                  */
 256                                 *pBase160 = *++pTab;
 257                                 break;
 258                         } else {
 259
 260                                 /*
 261                                  * There's a carry.  This value gets
 262                                  * base160tab[0], we decrement the buffer
 263                                  * pointer to get the next higher-order digit,
 264                                  * and continue in the loop.
 265                                  */
 266                                 *pBase160-- = base160tab[0];
 267                         }
 268                 }
 269
 270                 sqlite3_result_text(hContext,
 271                                     pStart,
 272                                     strlen(pStart),
 273                                     free);
 274         } else {
 275                 sqlite3_result_value(hContext, argv[0]);
 276                 if (pBase160 != NULL) {
 277                         free(pBase160);
 278                 }
 279         }
 280 }
 281
 282 static char *parsetree_to_sql(struct ldb_module *module,
 283                               void *mem_ctx,
 284                               const struct ldb_parse_tree *t)
 285 {
 286         const struct ldb_attrib_handler *h;
 287         struct ldb_val value, subval;
 288         char *wild_card_string;
 289         char *child, *tmp;
 290         char *ret = NULL;
 291         char *attr;
 292         int i;
 293
 294
 295         switch(t->operation) {
 296         case LDB_OP_AND:
 297
 298                 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
 299                 if (tmp == NULL) return NULL;
 300
 301                 for (i = 1; i < t->u.list.num_elements; i++) {
 302
 303                         child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
 304                         if (child == NULL) return NULL;
 305
 306                         tmp = talloc_asprintf_append(tmp, " INTERSECT %s ", child);
 307                         if (tmp == NULL) return NULL;
 308                 }
 309
 310                 ret = talloc_asprintf(mem_ctx, "SELECT * FROM ( %s )\n", tmp);
 311
 312                 return ret;
 313
 314         case LDB_OP_OR:
 315
 316                 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
 317                 if (tmp == NULL) return NULL;
 318
 319                 for (i = 1; i < t->u.list.num_elements; i++) {
 320
 321                         child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
 322                         if (child == NULL) return NULL;
 323
 324                         tmp = talloc_asprintf_append(tmp, " UNION %s ", child);
 325                         if (tmp == NULL) return NULL;
 326                 }
 327
 328                 return talloc_asprintf(mem_ctx, "SELECT * FROM ( %s ) ", tmp);
 329
 330         case LDB_OP_NOT:
 331
 332                 child = parsetree_to_sql(module, mem_ctx, t->u.isnot.child);
 333                 if (child == NULL) return NULL;
 334
 335                 return talloc_asprintf(mem_ctx,
 336                                         "SELECT eid FROM ldb_entry "
 337                                         "WHERE eid NOT IN ( %s ) ", child);
 338
 339         case LDB_OP_EQUALITY:
 340                 /*
 341                  * For simple searches, we want to retrieve the list of EIDs that
 342                  * match the criteria.
 343                 */
 344                 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
 345                 if (attr == NULL) return NULL;
 346                 h = ldb_attrib_handler(module->ldb, attr);
 347
 348                 /* Get a canonicalised copy of the data */
 349                 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
 350                 if (value.data == NULL) {
 351                         return NULL;
 352                 }
 353
 354                 if (strcasecmp(t->u.equality.attr, "objectclass") == 0) {
 355                 /*
 356                  * For object classes, we want to search for all objectclasses
 357                  * that are subclasses as well.
 358                 */
 359                         return lsqlite3_tprintf(mem_ctx,
 360                                         "SELECT eid  FROM ldb_attribute_values\n"
 361                                         "WHERE norm_attr_name = 'OBJECTCLASS' "
 362                                         "AND norm_attr_value IN\n"
 363                                         "  (SELECT class_name FROM ldb_object_classes\n"
 364                                         "   WHERE tree_key GLOB\n"
 365                                         "     (SELECT tree_key FROM ldb_object_classes\n"
 366                                         "      WHERE class_name = '%q'\n"
 367                                         "     ) || '*'\n"
 368                                         "  )\n", value.data);
 369
 370                 } else if (strcasecmp(t->u.equality.attr, "dn") == 0) {
 371                         /* DN query is a special ldb case */
 372                         char *cdn = ldb_dn_linearize_casefold(module->ldb,
 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, 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 static int lsql_search_sync_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
 846 {
 847         struct ldb_result *res = NULL;
 848
 849         if (!context) {
 850                 ldb_set_errstring(ldb, "NULL Context in callback");
 851                 goto error;
 852         }
 853
 854         res = *((struct ldb_result **)context);
 855
 856         if (!res || !ares) {
 857                 goto error;
 858         }
 859
 860         if (ares->type == LDB_REPLY_ENTRY) {
 861                 res->msgs = talloc_realloc(res, res->msgs, struct ldb_message *, res->count + 2);
 862                 if (! res->msgs) {
 863                         goto error;
 864                 }
 865
 866                 res->msgs[res->count + 1] = NULL;
 867
 868                 res->msgs[res->count] = talloc_move(res->msgs, &ares->message);
 869                 res->count++;
 870         } else {
 871                 ldb_debug(ldb, LDB_DEBUG_ERROR, "unrecognized async reply in ltdb_search_sync_callback!\n");
 872                 goto error;
 873         }
 874
 875         talloc_free(ares);
 876         return LDB_SUCCESS;
 877
 878 error:
 879         if (ares) talloc_free(ares);
 880         if (res) talloc_free(res);
 881         if (context) *((struct ldb_result **)context) = NULL;
 882         return LDB_ERR_OPERATIONS_ERROR;
 883 }
 884
 885 /* search for matching records, by tree */
 886 int lsql_search_async(struct ldb_module *module, const struct ldb_dn *base,
 887                       enum ldb_scope scope, struct ldb_parse_tree *tree,
 888                       const char * const *attrs,
 889                       void *context,
 890                       int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
 891                       struct ldb_handle **handle)
 892 {
 893         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
 894         struct lsql_context *lsql_ac;
 895         char *norm_basedn;
 896         char *sqlfilter;
 897         char *errmsg;
 898         char *query = NULL;
 899         int ret;
 900
 901         *handle = init_handle(lsqlite3, module, context, callback);
 902         if (*handle == NULL) {
 903                 talloc_free(*handle);
 904                 return LDB_ERR_OPERATIONS_ERROR;
 905         }
 906
 907         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_context);
 908
 909         if (base) {
 910                 norm_basedn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, base));
 911                 if (norm_basedn == NULL) {
 912                         ret = LDB_ERR_INVALID_DN_SYNTAX;
 913                         goto failed;
 914                 }
 915         } else norm_basedn = talloc_strdup(lsql_ac, "");
 916
 917         if (*norm_basedn == '\0' &&
 918                 (scope == LDB_SCOPE_BASE || scope == LDB_SCOPE_ONELEVEL)) {
 919                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
 920                         goto failed;
 921                 }
 922
 923         /* Convert filter into a series of SQL conditions (constraints) */
 924         sqlfilter = parsetree_to_sql(module, lsql_ac, tree);
 925
 926         switch(scope) {
 927         case LDB_SCOPE_DEFAULT:
 928         case LDB_SCOPE_SUBTREE:
 929                 if (*norm_basedn != '\0') {
 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 GLOB('*,%q')\n"
 944                                 "       OR ldb_entry.norm_dn = '%q')\n"
 945                                 "       AND ldb_entry.eid IN\n"
 946                                 "         (%s)\n"
 947                                 "    )\n"
 948
 949                                 "  ORDER BY entry.eid ASC;",
 950                                 norm_basedn,
 951                                 norm_basedn,
 952                                 sqlfilter);
 953                 } else {
 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 ldb_entry.eid IN\n"
 968                                 "         (%s)\n"
 969                                 "    )\n"
 970
 971                                 "  ORDER BY entry.eid ASC;",
 972                                 sqlfilter);
 973                 }
 974
 975                 break;
 976
 977         case LDB_SCOPE_BASE:
 978                 query = lsqlite3_tprintf(lsql_ac,
 979                         "SELECT entry.eid,\n"
 980                         "       entry.dn,\n"
 981                         "       av.attr_name,\n"
 982                         "       av.attr_value\n"
 983                         "  FROM ldb_entry AS entry\n"
 984
 985                         "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
 986                         "    ON av.eid = entry.eid\n"
 987
 988                         "  WHERE entry.eid IN\n"
 989                         "    (SELECT DISTINCT ldb_entry.eid\n"
 990                         "       FROM ldb_entry\n"
 991                         "       WHERE ldb_entry.norm_dn = '%q'\n"
 992                         "         AND ldb_entry.eid IN\n"
 993                         "           (%s)\n"
 994                         "    )\n"
 995
 996                         "  ORDER BY entry.eid ASC;",
 997                         norm_basedn,
 998                         sqlfilter);
 999                 break;
1000
1001         case LDB_SCOPE_ONELEVEL:
1002                 query = lsqlite3_tprintf(lsql_ac,
1003                         "SELECT entry.eid,\n"
1004                         "       entry.dn,\n"
1005                         "       av.attr_name,\n"
1006                         "       av.attr_value\n"
1007                         "  FROM ldb_entry AS entry\n"
1008
1009                         "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
1010                         "    ON av.eid = entry.eid\n"
1011
1012                         "  WHERE entry.eid IN\n"
1013                         "    (SELECT DISTINCT ldb_entry.eid\n"
1014                         "       FROM ldb_entry\n"
1015                         "       WHERE norm_dn GLOB('*,%q')\n"
1016                         "         AND NOT norm_dn GLOB('*,*,%q')\n"
1017                         "         AND ldb_entry.eid IN\n(%s)\n"
1018                         "    )\n"
1019
1020                         "  ORDER BY entry.eid ASC;",
1021                         norm_basedn,
1022                         norm_basedn,
1023                         sqlfilter);
1024                 break;
1025         }
1026
1027         if (query == NULL) {
1028                 goto failed;
1029         }
1030
1031         /* * /
1032         printf ("%s\n", query);
1033         / * */
1034
1035         lsql_ac->current_eid = 0;
1036         lsql_ac->attrs = attrs;
1037         lsql_ac->ares = NULL;
1038
1039         (*handle)->state = LDB_ASYNC_PENDING;
1040
1041         ret = sqlite3_exec(lsqlite3->sqlite, query, lsqlite3_search_callback, *handle, &errmsg);
1042         if (ret != SQLITE_OK) {
1043                 if (errmsg) {
1044                         ldb_set_errstring(module->ldb, errmsg);
1045                         free(errmsg);
1046                 }
1047                 goto failed;
1048         }
1049
1050         /* complete the last message if any */
1051         if (lsql_ac->ares) {
1052                 lsql_ac->ares->message = ldb_msg_canonicalize(module->ldb, lsql_ac->ares->message);
1053                 if (lsql_ac->ares->message == NULL)
1054                         goto failed;
1055
1056                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, lsql_ac->ares);
1057                 if ((*handle)->status != LDB_SUCCESS)
1058                         goto failed;
1059         }
1060
1061         (*handle)->state = LDB_ASYNC_DONE;
1062
1063         return LDB_SUCCESS;
1064
1065 failed:
1066         talloc_free(*handle);
1067         return LDB_ERR_OPERATIONS_ERROR;
1068 }
1069
1070 static int lsql_search_bytree(struct ldb_module * module, const struct ldb_dn* base,
1071                               enum ldb_scope scope, struct ldb_parse_tree * tree,
1072                               const char * const * attrs, struct ldb_result ** res)
1073 {
1074         struct ldb_handle *handle;
1075         int ret;
1076
1077         *res = talloc_zero(module, struct ldb_result);
1078         if (! *res) {
1079                 return LDB_ERR_OPERATIONS_ERROR;
1080         }
1081
1082         ret = lsql_search_async(module, base, scope, tree, attrs,
1083                                 res, &lsql_search_sync_callback,
1084                                 &handle);
1085
1086         if (ret == LDB_SUCCESS) {
1087                 ret = ldb_wait(handle, LDB_WAIT_ALL);
1088                 talloc_free(handle);
1089         }
1090
1091         if (ret != LDB_SUCCESS) {
1092                 talloc_free(*res);
1093         }
1094
1095         return ret;
1096 }
1097
1098 /* add a record */
1099 static int lsql_add_async(struct ldb_module *module, struct ldb_message *msg,
1100                           void *context,
1101                           int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
1102                           struct ldb_handle **handle)
1103 {
1104         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1105         struct lsql_context *lsql_ac;
1106         long long eid;
1107         char *dn, *ndn;
1108         char *errmsg;
1109         char *query;
1110         int i;
1111         int ret = LDB_ERR_OPERATIONS_ERROR;
1112
1113         *handle = init_handle(lsqlite3, module, context, callback);
1114         if (*handle == NULL) {
1115                 goto failed;
1116         }
1117         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_context);
1118         (*handle)->state = LDB_ASYNC_DONE;
1119         (*handle)->status = LDB_SUCCESS;
1120
1121         /* See if this is an ltdb special */
1122         if (ldb_dn_is_special(msg->dn)) {
1123                 struct ldb_dn *c;
1124
1125                 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1126                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1127 #warning "insert subclasses into object class tree"
1128                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
1129                         goto failed;
1130                 }
1131
1132 /*
1133                 c = ldb_dn_explode(local_ctx, "@INDEXLIST");
1134                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1135 #warning "should we handle indexes somehow ?"
1136                         goto failed;
1137                 }
1138 */
1139                 /* Others are implicitly ignored */
1140                 return LDB_SUCCESS;
1141         }
1142
1143         /* create linearized and normalized dns */
1144         dn = ldb_dn_linearize(lsql_ac, msg->dn);
1145         ndn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, msg->dn));
1146         if (dn == NULL || ndn == NULL) {
1147                 ret = LDB_ERR_OTHER;
1148                 goto failed;
1149         }
1150
1151         query = lsqlite3_tprintf(lsql_ac,
1152                                    /* Add new entry */
1153                                    "INSERT OR ABORT INTO ldb_entry "
1154                                    "('dn', 'norm_dn') "
1155                                    "VALUES ('%q', '%q');",
1156                                 dn, ndn);
1157         if (query == NULL) {
1158                 ret = LDB_ERR_OTHER;
1159                 goto failed;
1160         }
1161
1162         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1163         if (ret != SQLITE_OK) {
1164                 if (errmsg) {
1165                         ldb_set_errstring(module->ldb, errmsg);
1166                         free(errmsg);
1167                 }
1168                 ret = LDB_ERR_OTHER;
1169                 goto failed;
1170         }
1171
1172         eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, lsql_ac, ndn);
1173         if (eid == -1) {
1174                 ret = LDB_ERR_OTHER;
1175                 goto failed;
1176         }
1177
1178         for (i = 0; i < msg->num_elements; i++) {
1179                 const struct ldb_message_element *el = &msg->elements[i];
1180                 const struct ldb_attrib_handler *h;
1181                 char *attr;
1182                 int j;
1183
1184                 /* Get a case-folded copy of the attribute name */
1185                 attr = ldb_attr_casefold(lsql_ac, el->name);
1186                 if (attr == NULL) {
1187                         ret = LDB_ERR_OTHER;
1188                         goto failed;
1189                 }
1190
1191                 h = ldb_attrib_handler(module->ldb, el->name);
1192
1193                 /* For each value of the specified attribute name... */
1194                 for (j = 0; j < el->num_values; j++) {
1195                         struct ldb_val value;
1196                         char *insert;
1197
1198                         /* Get a canonicalised copy of the data */
1199                         h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1200                         if (value.data == NULL) {
1201                                 ret = LDB_ERR_OTHER;
1202                                 goto failed;
1203                         }
1204
1205                         insert = lsqlite3_tprintf(lsql_ac,
1206                                         "INSERT OR ROLLBACK INTO ldb_attribute_values "
1207                                         "('eid', 'attr_name', 'norm_attr_name',"
1208                                         " 'attr_value', 'norm_attr_value') "
1209                                         "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1210                                         eid, el->name, attr,
1211                                         el->values[j].data, value.data);
1212                         if (insert == NULL) {
1213                                 ret = LDB_ERR_OTHER;
1214                                 goto failed;
1215                         }
1216
1217                         ret = sqlite3_exec(lsqlite3->sqlite, insert, NULL, NULL, &errmsg);
1218                         if (ret != SQLITE_OK) {
1219                                 if (errmsg) {
1220                                         ldb_set_errstring(module->ldb, errmsg);
1221                                         free(errmsg);
1222                                 }
1223                                 ret = LDB_ERR_OTHER;
1224                                 goto failed;
1225                         }
1226                 }
1227         }
1228
1229         if (lsql_ac->callback)
1230                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1231
1232         return LDB_SUCCESS;
1233
1234 failed:
1235         talloc_free(*handle);
1236         return ret;
1237 }
1238
1239 static int lsql_add(struct ldb_module *module, const struct ldb_message *msg)
1240 {
1241         struct ldb_handle *handle;
1242         int ret;
1243
1244         ret = lsql_add_async(module, msg, NULL, NULL, &handle);
1245
1246         if (ret != LDB_SUCCESS)
1247                 return ret;
1248
1249         ret = ldb_wait(handle, LDB_WAIT_ALL);
1250
1251         talloc_free(handle);
1252         return ret;
1253 }
1254
1255
1256 /* modify a record */
1257 static int lsql_modify_async(struct ldb_module *module, const struct ldb_message *msg,
1258                              void *context,
1259                              int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
1260                              struct ldb_handle **handle)
1261 {
1262         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1263         struct lsql_context *lsql_ac;
1264         long long eid;
1265         char *errmsg;
1266         int i;
1267         int ret = LDB_ERR_OPERATIONS_ERROR;
1268
1269         *handle = init_handle(lsqlite3, module, context, callback);
1270         if (*handle == NULL) {
1271                 goto failed;
1272         }
1273         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_context);
1274         (*handle)->state = LDB_ASYNC_DONE;
1275         (*handle)->status = LDB_SUCCESS;
1276
1277         /* See if this is an ltdb special */
1278         if (ldb_dn_is_special(msg->dn)) {
1279                 struct ldb_dn *c;
1280
1281                 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1282                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1283 #warning "modify subclasses into object class tree"
1284                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
1285                         goto failed;
1286                 }
1287
1288                 /* Others are implicitly ignored */
1289                 return LDB_SUCCESS;
1290         }
1291
1292         eid = lsqlite3_get_eid(module, msg->dn);
1293         if (eid == -1) {
1294                 ret = LDB_ERR_OTHER;
1295                 goto failed;
1296         }
1297
1298         for (i = 0; i < msg->num_elements; i++) {
1299                 const struct ldb_message_element *el = &msg->elements[i];
1300                 const struct ldb_attrib_handler *h;
1301                 int flags = el->flags & LDB_FLAG_MOD_MASK;
1302                 char *attr;
1303                 char *mod;
1304                 int j;
1305
1306                 /* Get a case-folded copy of the attribute name */
1307                 attr = ldb_attr_casefold(lsql_ac, el->name);
1308                 if (attr == NULL) {
1309                         ret = LDB_ERR_OTHER;
1310                         goto failed;
1311                 }
1312
1313                 h = ldb_attrib_handler(module->ldb, el->name);
1314
1315                 switch (flags) {
1316
1317                 case LDB_FLAG_MOD_REPLACE:
1318
1319                         /* remove all attributes before adding the replacements */
1320                         mod = lsqlite3_tprintf(lsql_ac,
1321                                                 "DELETE FROM ldb_attribute_values "
1322                                                 "WHERE eid = '%lld' "
1323                                                 "AND norm_attr_name = '%q';",
1324                                                 eid, attr);
1325                         if (mod == NULL) {
1326                                 ret = LDB_ERR_OTHER;
1327                                 goto failed;
1328                         }
1329
1330                         ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1331                         if (ret != SQLITE_OK) {
1332                                 if (errmsg) {
1333                                         ldb_set_errstring(module->ldb, errmsg);
1334                                         free(errmsg);
1335                                 }
1336                                 ret = LDB_ERR_OTHER;
1337                                 goto failed;
1338                         }
1339
1340                         /* MISSING break is INTENTIONAL */
1341
1342                 case LDB_FLAG_MOD_ADD:
1343 #warning "We should throw an error if no value is provided!"
1344                         /* For each value of the specified attribute name... */
1345                         for (j = 0; j < el->num_values; j++) {
1346                                 struct ldb_val value;
1347
1348                                 /* Get a canonicalised copy of the data */
1349                                 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1350                                 if (value.data == NULL) {
1351                                         ret = LDB_ERR_OTHER;
1352                                         goto failed;
1353                                 }
1354
1355                                 mod = lsqlite3_tprintf(lsql_ac,
1356                                         "INSERT OR ROLLBACK INTO ldb_attribute_values "
1357                                         "('eid', 'attr_name', 'norm_attr_name',"
1358                                         " 'attr_value', 'norm_attr_value') "
1359                                         "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1360                                         eid, el->name, attr,
1361                                         el->values[j].data, value.data);
1362
1363                                 if (mod == NULL) {
1364                                         ret = LDB_ERR_OTHER;
1365                                         goto failed;
1366                                 }
1367
1368                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1369                                 if (ret != SQLITE_OK) {
1370                                         if (errmsg) {
1371                                                 ldb_set_errstring(module->ldb, errmsg);
1372                                                 free(errmsg);
1373                                         }
1374                                         ret = LDB_ERR_OTHER;
1375                                         goto failed;
1376                                 }
1377                         }
1378
1379                         break;
1380
1381                 case LDB_FLAG_MOD_DELETE:
1382 #warning "We should throw an error if the attribute we are trying to delete does not exist!"
1383                         if (el->num_values == 0) {
1384                                 mod = lsqlite3_tprintf(lsql_ac,
1385                                                         "DELETE FROM ldb_attribute_values "
1386                                                         "WHERE eid = '%lld' "
1387                                                         "AND norm_attr_name = '%q';",
1388                                                         eid, attr);
1389                                 if (mod == NULL) {
1390                                         ret = LDB_ERR_OTHER;
1391                                         goto failed;
1392                                 }
1393
1394                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1395                                 if (ret != SQLITE_OK) {
1396                                         if (errmsg) {
1397                                                 ldb_set_errstring(module->ldb, errmsg);
1398                                                 free(errmsg);
1399                                         }
1400                                         ret = LDB_ERR_OTHER;
1401                                         goto failed;
1402                                 }
1403                         }
1404
1405                         /* For each value of the specified attribute name... */
1406                         for (j = 0; j < el->num_values; j++) {
1407                                 struct ldb_val value;
1408
1409                                 /* Get a canonicalised copy of the data */
1410                                 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1411                                 if (value.data == NULL) {
1412                                         ret = LDB_ERR_OTHER;
1413                                         goto failed;
1414                                 }
1415
1416                                 mod = lsqlite3_tprintf(lsql_ac,
1417                                         "DELETE FROM ldb_attribute_values "
1418                                         "WHERE eid = '%lld' "
1419                                         "AND norm_attr_name = '%q' "
1420                                         "AND norm_attr_value = '%q';",
1421                                         eid, attr, value.data);
1422
1423                                 if (mod == NULL) {
1424                                         ret = LDB_ERR_OTHER;
1425                                         goto failed;
1426                                 }
1427
1428                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1429                                 if (ret != SQLITE_OK) {
1430                                         if (errmsg) {
1431                                                 ldb_set_errstring(module->ldb, errmsg);
1432                                                 free(errmsg);
1433                                         }
1434                                         ret = LDB_ERR_OTHER;
1435                                         goto failed;
1436                                 }
1437                         }
1438
1439                         break;
1440                 }
1441         }
1442
1443         if (lsql_ac->callback)
1444                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1445
1446         return LDB_SUCCESS;
1447
1448 failed:
1449         talloc_free(*handle);
1450         return ret;
1451 }
1452
1453 static int lsql_modify(struct ldb_module *module, const struct ldb_message *msg)
1454 {
1455         struct ldb_handle *handle;
1456         int ret;
1457
1458         ret = lsql_modify_async(module, msg, NULL, NULL, &handle);
1459
1460         if (ret != LDB_SUCCESS)
1461                 return ret;
1462
1463         ret = ldb_wait(handle, LDB_WAIT_ALL);
1464
1465         talloc_free(handle);
1466         return ret;
1467 }
1468
1469 /* delete a record */
1470 static int lsql_delete_async(struct ldb_module *module, const struct ldb_dn *dn,
1471                              void *context,
1472                              int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
1473                              struct ldb_handle **handle)
1474 {
1475         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1476         struct lsql_context *lsql_ac;
1477         long long eid;
1478         char *errmsg;
1479         char *query;
1480         int ret = LDB_ERR_OPERATIONS_ERROR;
1481
1482
1483         *handle = init_handle(lsqlite3, module, context, callback);
1484         if (*handle == NULL) {
1485                 goto failed;
1486         }
1487         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_context);
1488         (*handle)->state = LDB_ASYNC_DONE;
1489         (*handle)->status = LDB_SUCCESS;
1490
1491         eid = lsqlite3_get_eid(module, dn);
1492         if (eid == -1) {
1493                 goto failed;
1494         }
1495
1496         query = lsqlite3_tprintf(lsql_ac,
1497                                    /* Delete entry */
1498                                    "DELETE FROM ldb_entry WHERE eid = %lld; "
1499                                    /* Delete attributes */
1500                                    "DELETE FROM ldb_attribute_values WHERE eid = %lld; ",
1501                                 eid, eid);
1502         if (query == NULL) {
1503                 ret = LDB_ERR_OTHER;
1504                 goto failed;
1505         }
1506
1507         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1508         if (ret != SQLITE_OK) {
1509                 if (errmsg) {
1510                         ldb_set_errstring(module->ldb, errmsg);
1511                         free(errmsg);
1512                 }
1513                 ret = LDB_ERR_OPERATIONS_ERROR;
1514                 goto failed;
1515         }
1516
1517         if (lsql_ac->callback)
1518                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1519
1520         return LDB_SUCCESS;
1521
1522 failed:
1523         talloc_free(*handle);
1524         return ret;
1525 }
1526
1527 static int lsql_delete(struct ldb_module *module, const struct ldb_dn *dn)
1528 {
1529         struct ldb_handle *handle;
1530         int ret;
1531
1532         /* ignore ltdb specials */
1533         if (ldb_dn_is_special(dn)) {
1534                 return LDB_SUCCESS;
1535         }
1536
1537         ret = lsql_delete_async(module, dn, NULL, NULL, &handle);
1538
1539         if (ret != LDB_SUCCESS)
1540                 return ret;
1541
1542         ret = ldb_wait(handle, LDB_WAIT_ALL);
1543
1544         talloc_free(handle);
1545         return ret;
1546 }
1547
1548 /* rename a record */
1549 static int lsql_rename_async(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn,
1550                              void *context,
1551                              int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
1552                              struct ldb_handle **handle)
1553 {
1554         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1555         struct lsql_context *lsql_ac;
1556         char *new_dn, *new_cdn, *old_cdn;
1557         char *errmsg;
1558         char *query;
1559         int ret = LDB_ERR_OPERATIONS_ERROR;
1560
1561         *handle = init_handle(lsqlite3, module, context, callback);
1562         if (*handle == NULL) {
1563                 goto failed;
1564         }
1565         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_context);
1566         (*handle)->state = LDB_ASYNC_DONE;
1567         (*handle)->status = LDB_SUCCESS;
1568
1569         /* create linearized and normalized dns */
1570         old_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, olddn));
1571         new_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, newdn));
1572         new_dn = ldb_dn_linearize(lsql_ac, newdn);
1573         if (old_cdn == NULL || new_cdn == NULL || new_dn == NULL) {
1574                 goto failed;
1575         }
1576
1577         /* build the SQL query */
1578         query = lsqlite3_tprintf(lsql_ac,
1579                                  "UPDATE ldb_entry SET dn = '%q', norm_dn = '%q' "
1580                                  "WHERE norm_dn = '%q';",
1581                                  new_dn, new_cdn, old_cdn);
1582         if (query == NULL) {
1583                 goto failed;
1584         }
1585
1586         /* execute */
1587         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1588         if (ret != SQLITE_OK) {
1589                 if (errmsg) {
1590                         ldb_set_errstring(module->ldb, errmsg);
1591                         free(errmsg);
1592                 }
1593                 ret = LDB_ERR_OPERATIONS_ERROR;
1594                 goto failed;
1595         }
1596
1597         if (lsql_ac->callback)
1598                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1599
1600         return LDB_SUCCESS;
1601
1602 failed:
1603         talloc_free(*handle);
1604         return ret;
1605 }
1606
1607 static int lsql_rename(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn)
1608 {
1609         struct ldb_handle *handle;
1610         int ret;
1611
1612         /* ignore ltdb specials */
1613         if (ldb_dn_is_special(olddn) || ldb_dn_is_special(newdn)) {
1614                 return LDB_SUCCESS;
1615         }
1616
1617
1618         ret = lsql_rename_async(module, olddn, newdn, NULL, NULL, &handle);
1619
1620         if (ret != LDB_SUCCESS)
1621                 return ret;
1622
1623         ret = ldb_wait(handle, LDB_WAIT_ALL);
1624
1625         talloc_free(handle);
1626         return ret;
1627 }
1628
1629 static int lsql_start_trans(struct ldb_module * module)
1630 {
1631         int ret;
1632         char *errmsg;
1633         struct lsqlite3_private *   lsqlite3 = module->private_data;
1634
1635         if (lsqlite3->trans_count == 0) {
1636                 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN IMMEDIATE;", NULL, NULL, &errmsg);
1637                 if (ret != SQLITE_OK) {
1638                         if (errmsg) {
1639                                 printf("lsqlite3_start_trans: error: %s\n", errmsg);
1640                                 free(errmsg);
1641                         }
1642                         return -1;
1643                 }
1644         };
1645
1646         lsqlite3->trans_count++;
1647
1648         return 0;
1649 }
1650
1651 static int lsql_end_trans(struct ldb_module *module)
1652 {
1653         int ret;
1654         char *errmsg;
1655         struct lsqlite3_private *lsqlite3 = module->private_data;
1656
1657         if (lsqlite3->trans_count > 0) {
1658                 lsqlite3->trans_count--;
1659         } else return -1;
1660
1661         if (lsqlite3->trans_count == 0) {
1662                 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1663                 if (ret != SQLITE_OK) {
1664                         if (errmsg) {
1665                                 printf("lsqlite3_end_trans: error: %s\n", errmsg);
1666                                 free(errmsg);
1667                         }
1668                         return -1;
1669                 }
1670         }
1671
1672         return 0;
1673 }
1674
1675 static int lsql_del_trans(struct ldb_module *module)
1676 {
1677         struct lsqlite3_private *lsqlite3 = module->private_data;
1678
1679         if (lsqlite3->trans_count > 0) {
1680                 lsqlite3->trans_count--;
1681         } else return -1;
1682
1683         if (lsqlite3->trans_count == 0) {
1684                 return lsqlite3_safe_rollback(lsqlite3->sqlite);
1685         }
1686
1687         return -1;
1688 }
1689
1690 /*
1691  * Static functions
1692  */
1693
1694 static int initialize(struct lsqlite3_private *lsqlite3,
1695                       struct ldb_context *ldb, const char *url, int flags)
1696 {
1697         TALLOC_CTX *local_ctx;
1698         long long queryInt;
1699         int rollback = 0;
1700         char *errmsg;
1701         char *schema;
1702         int ret;
1703
1704         /* create a local ctx */
1705         local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context");
1706         if (local_ctx == NULL) {
1707                 return -1;
1708         }
1709
1710         schema = lsqlite3_tprintf(local_ctx,
1711
1712
1713                 "CREATE TABLE ldb_info AS "
1714                 "  SELECT 'LDB' AS database_type,"
1715                 "         '1.0' AS version;"
1716
1717                 /*
1718                  * The entry table holds the information about an entry.
1719                  * This table is used to obtain the EID of the entry and to
1720                  * support scope=one and scope=base.  The parent and child
1721                  * table is included in the entry table since all the other
1722                  * attributes are dependent on EID.
1723                  */
1724                 "CREATE TABLE ldb_entry "
1725                 "("
1726                 "  eid     INTEGER PRIMARY KEY AUTOINCREMENT,"
1727                 "  dn      TEXT UNIQUE NOT NULL,"
1728                 "  norm_dn TEXT UNIQUE NOT NULL"
1729                 ");"
1730
1731
1732                 "CREATE TABLE ldb_object_classes"
1733                 "("
1734                 "  class_name            TEXT PRIMARY KEY,"
1735                 "  parent_class_name     TEXT,"
1736                 "  tree_key              TEXT UNIQUE,"
1737                 "  max_child_num         INTEGER DEFAULT 0"
1738                 ");"
1739
1740                 /*
1741                  * We keep a full listing of attribute/value pairs here
1742                  */
1743                 "CREATE TABLE ldb_attribute_values"
1744                 "("
1745                 "  eid             INTEGER REFERENCES ldb_entry,"
1746                 "  attr_name       TEXT,"
1747                 "  norm_attr_name  TEXT,"
1748                 "  attr_value      TEXT,"
1749                 "  norm_attr_value TEXT "
1750                 ");"
1751
1752
1753                 /*
1754                  * Indexes
1755                  */
1756                 "CREATE INDEX ldb_attribute_values_eid_idx "
1757                 "  ON ldb_attribute_values (eid);"
1758
1759                 "CREATE INDEX ldb_attribute_values_name_value_idx "
1760                 "  ON ldb_attribute_values (attr_name, norm_attr_value);"
1761
1762
1763
1764                 /*
1765                  * Triggers
1766                  */
1767
1768                 "CREATE TRIGGER ldb_object_classes_insert_tr"
1769                 "  AFTER INSERT"
1770                 "  ON ldb_object_classes"
1771                 "  FOR EACH ROW"
1772                 "    BEGIN"
1773                 "      UPDATE ldb_object_classes"
1774                 "        SET tree_key = COALESCE(tree_key, "
1775                 "              ("
1776                 "                SELECT tree_key || "
1777                 "                       (SELECT base160(max_child_num + 1)"
1778                 "                                FROM ldb_object_classes"
1779                 "                                WHERE class_name = "
1780                 "                                      new.parent_class_name)"
1781                 "                  FROM ldb_object_classes "
1782                 "                  WHERE class_name = new.parent_class_name "
1783                 "              ));"
1784                 "      UPDATE ldb_object_classes "
1785                 "        SET max_child_num = max_child_num + 1"
1786                 "        WHERE class_name = new.parent_class_name;"
1787                 "    END;"
1788
1789                 /*
1790                  * Table initialization
1791                  */
1792
1793                 "INSERT INTO ldb_object_classes "
1794                 "    (class_name, tree_key) "
1795                 "  VALUES "
1796                 "    ('TOP', '0001');");
1797
1798         /* Skip protocol indicator of url  */
1799         if (strncmp(url, "sqlite://", 9) != 0) {
1800                 return SQLITE_MISUSE;
1801         }
1802
1803         /* Update pointer to just after the protocol indicator */
1804         url += 9;
1805
1806         /* Try to open the (possibly empty/non-existent) database */
1807         if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) {
1808                 return ret;
1809         }
1810
1811         /* In case this is a new database, enable auto_vacuum */
1812         ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA auto_vacuum = 1;", 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
1821         if (flags & LDB_FLG_NOSYNC) {
1822                 /* DANGEROUS */
1823                 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA synchronous = OFF;", NULL, NULL, &errmsg);
1824                 if (ret != SQLITE_OK) {
1825                         if (errmsg) {
1826                                 printf("lsqlite3 initializaion error: %s\n", errmsg);
1827                                 free(errmsg);
1828                         }
1829                         goto failed;
1830                 }
1831         }
1832
1833         /* */
1834
1835         /* Establish a busy timeout of 30 seconds */
1836         if ((ret = sqlite3_busy_timeout(lsqlite3->sqlite,
1837                                         30000)) != SQLITE_OK) {
1838                 return ret;
1839         }
1840
1841         /* Create a function, callable from sql, to increment a tree_key */
1842         if ((ret =
1843              sqlite3_create_function(lsqlite3->sqlite,/* handle */
1844                                      "base160_next",  /* function name */
1845                                      1,               /* number of args */
1846                                      SQLITE_ANY,      /* preferred text type */
1847                                      NULL,            /* user data */
1848                                      base160next_sql, /* called func */
1849                                      NULL,            /* step func */
1850                                      NULL             /* final func */
1851                      )) != SQLITE_OK) {
1852                 return ret;
1853         }
1854
1855         /* Create a function, callable from sql, to convert int to base160 */
1856         if ((ret =
1857              sqlite3_create_function(lsqlite3->sqlite,/* handle */
1858                                      "base160",       /* function name */
1859                                      1,               /* number of args */
1860                                      SQLITE_ANY,      /* preferred text type */
1861                                      NULL,            /* user data */
1862                                      base160_sql,     /* called func */
1863                                      NULL,            /* step func */
1864                                      NULL             /* final func */
1865                      )) != SQLITE_OK) {
1866                 return ret;
1867         }
1868
1869         /* Create a function, callable from sql, to perform various comparisons */
1870         if ((ret =
1871              sqlite3_create_function(lsqlite3->sqlite, /* handle */
1872                                      "ldap_compare",   /* function name */
1873                                      4,                /* number of args */
1874                                      SQLITE_ANY,       /* preferred text type */
1875                                      ldb  ,            /* user data */
1876                                      lsqlite3_compare, /* called func */
1877                                      NULL,             /* step func */
1878                                      NULL              /* final func */
1879                      )) != SQLITE_OK) {
1880                 return ret;
1881         }
1882
1883         /* Begin a transaction */
1884         ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg);
1885         if (ret != SQLITE_OK) {
1886                 if (errmsg) {
1887                         printf("lsqlite3: initialization error: %s\n", errmsg);
1888                         free(errmsg);
1889                 }
1890                 goto failed;
1891         }
1892         rollback = 1;
1893
1894         /* Determine if this is a new database.  No tables means it is. */
1895         if (query_int(lsqlite3,
1896                       &queryInt,
1897                       "SELECT COUNT(*)\n"
1898                       "  FROM sqlite_master\n"
1899                       "  WHERE type = 'table';") != 0) {
1900                 goto failed;
1901         }
1902
1903         if (queryInt == 0) {
1904                 /*
1905                  * Create the database schema
1906                  */
1907                 ret = sqlite3_exec(lsqlite3->sqlite, schema, NULL, NULL, &errmsg);
1908                 if (ret != SQLITE_OK) {
1909                         if (errmsg) {
1910                                 printf("lsqlite3 initializaion error: %s\n", errmsg);
1911                                 free(errmsg);
1912                         }
1913                         goto failed;
1914                 }
1915         } else {
1916                 /*
1917                  * Ensure that the database we opened is one of ours
1918                  */
1919                 if (query_int(lsqlite3,
1920                               &queryInt,
1921                               "SELECT "
1922                               "  (SELECT COUNT(*) = 2"
1923                               "     FROM sqlite_master "
1924                               "     WHERE type = 'table' "
1925                               "       AND name IN "
1926                               "         ("
1927                               "           'ldb_entry', "
1928                               "           'ldb_object_classes' "
1929                               "         ) "
1930                               "  ) "
1931                               "  AND "
1932                               "  (SELECT 1 "
1933                               "     FROM ldb_info "
1934                               "     WHERE database_type = 'LDB' "
1935                               "       AND version = '1.0'"
1936                               "  );") != 0 ||
1937                     queryInt != 1) {
1938
1939                         /* It's not one that we created.  See ya! */
1940                         goto failed;
1941                 }
1942         }
1943
1944         /* Commit the transaction */
1945         ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1946         if (ret != SQLITE_OK) {
1947                 if (errmsg) {
1948                         printf("lsqlite3: iniialization error: %s\n", errmsg);
1949                         free(errmsg);
1950                 }
1951                 goto failed;
1952         }
1953
1954         return SQLITE_OK;
1955
1956 failed:
1957         if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite);
1958         sqlite3_close(lsqlite3->sqlite);
1959         return -1;
1960 }
1961
1962 static int destructor(struct lsqlite3_private *lsqlite3)
1963 {
1964         if (lsqlite3->sqlite) {
1965                 sqlite3_close(lsqlite3->sqlite);
1966         }
1967         return 0;
1968 }
1969
1970 static int lsql_wait(struct ldb_handle *handle, enum ldb_wait_type type)
1971 {
1972         return handle->status;
1973 }
1974
1975 static int lsql_request(struct ldb_module *module, struct ldb_request *req)
1976 {
1977         /* check for oustanding critical controls and return an error if found */
1978
1979         if (req->controls != NULL) {
1980                 ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_sqlite3 backend!\n");
1981         }
1982
1983         if (check_critical_controls(req->controls)) {
1984                 return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
1985         }
1986
1987         switch (req->operation) {
1988
1989         case LDB_SEARCH:
1990                 return lsql_search_bytree(module,
1991                                           req->op.search.base,
1992                                           req->op.search.scope,
1993                                           req->op.search.tree,
1994                                           req->op.search.attrs,
1995                                           &req->op.search.res);
1996
1997         case LDB_ADD:
1998                 return lsql_add(module, req->op.add.message);
1999
2000         case LDB_MODIFY:
2001                 return lsql_modify(module, req->op.mod.message);
2002
2003         case LDB_DELETE:
2004                 return lsql_delete(module, req->op.del.dn);
2005
2006         case LDB_RENAME:
2007                 return lsql_rename(module,
2008                                         req->op.rename.olddn,
2009                                         req->op.rename.newdn);
2010
2011         case LDB_SEARCH:
2012                 return lsql_search_async(module,
2013                                         req->op.search.base,
2014                                         req->op.search.scope,
2015                                         req->op.search.tree,
2016                                         req->op.search.attrs,
2017                                         req->context,
2018                                         req->callback,
2019                                         &req->handle);
2020 /*
2021         case LDB_ADD:
2022                 return lsql_add_async(module,
2023                                         req->op.add.message,
2024                                         req->context,
2025                                         req->callback,
2026                                         &req->handle);
2027
2028         case LDB_MODIFY:
2029                 return lsql_modify_async(module,
2030                                         req->op.mod.message,
2031                                         req->context,
2032                                         req->callback,
2033                                         &req->handle);
2034 */
2035         case LDB_DELETE:
2036                 return lsql_delete_async(module,
2037                                         req->op.del.dn,
2038                                         req->context,
2039                                         req->callback,
2040                                         &req->handle);
2041
2042         case LDB_RENAME:
2043                 return lsql_rename_async(module,
2044                                         req->op.rename.olddn,
2045                                         req->op.rename.newdn,
2046                                         req->context,
2047                                         req->callback,
2048                                         &req->handle);
2049
2050         default:
2051                 return LDB_ERR_OPERATIONS_ERROR;
2052
2053         }
2054 }
2055
2056 /*
2057  * Table of operations for the sqlite3 backend
2058  */
2059 static const struct ldb_module_ops lsqlite3_ops = {
2060         .name              = "sqlite",
2061         .request           = lsql_request,
2062         .start_transaction = lsql_start_trans,
2063         .end_transaction   = lsql_end_trans,
2064         .del_transaction   = lsql_del_trans,
2065         .wait              = lsql_wait,
2066 };
2067
2068 /*
2069  * connect to the database
2070  */
2071 static int lsqlite3_connect(struct ldb_context *ldb,
2072                             const char *url,
2073                             unsigned int flags,
2074                             const char *options[],
2075                             struct ldb_module **module)
2076 {
2077         int                         i;
2078         int                         ret;
2079         struct lsqlite3_private *   lsqlite3 = NULL;
2080
2081         lsqlite3 = talloc(ldb, struct lsqlite3_private);
2082         if (!lsqlite3) {
2083                 goto failed;
2084         }
2085
2086         lsqlite3->sqlite = NULL;
2087         lsqlite3->options = NULL;
2088         lsqlite3->trans_count = 0;
2089
2090         ret = initialize(lsqlite3, ldb, url, flags);
2091         if (ret != SQLITE_OK) {
2092                 goto failed;
2093         }
2094
2095         talloc_set_destructor(lsqlite3, destructor);
2096
2097
2098
2099         *module = talloc(ldb, struct ldb_module);
2100         if (!module) {
2101                 ldb_oom(ldb);
2102                 goto failed;
2103         }
2104         talloc_set_name_const(*module, "ldb_sqlite3 backend");
2105         (*module)->ldb = ldb;
2106         (*module)->prev = (*module)->next = NULL;
2107         (*module)->private_data = lsqlite3;
2108         (*module)->ops = &lsqlite3_ops;
2109
2110         if (options) {
2111                 /*
2112                  * take a copy of the options array, so we don't have to rely
2113                  * on the caller keeping it around (it might be dynamic)
2114                  */
2115                 for (i=0;options[i];i++) ;
2116
2117                 lsqlite3->options = talloc_array(lsqlite3, char *, i+1);
2118                 if (!lsqlite3->options) {
2119                         goto failed;
2120                 }
2121
2122                 for (i=0;options[i];i++) {
2123
2124                         lsqlite3->options[i+1] = NULL;
2125                         lsqlite3->options[i] =
2126                                 talloc_strdup(lsqlite3->options, options[i]);
2127                         if (!lsqlite3->options[i]) {
2128                                 goto failed;
2129                         }
2130                 }
2131         }
2132
2133         return 0;
2134
2135 failed:
2136         if (lsqlite3->sqlite != NULL) {
2137                 (void) sqlite3_close(lsqlite3->sqlite);
2138         }
2139         talloc_free(lsqlite3);
2140         return -1;
2141 }
2142
2143 int ldb_sqlite3_init(void)
2144 {
2145         return ldb_register_backend("sqlite3", lsqlite3_connect);
2146 }