source4/lib/ldb/common/ldb.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Andrew Tridgell  2004
   5    Copyright (C) Simo Sorce  2005-2008
   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 core API
  29  *
  30  *  Description: core API routines interfacing to ldb backends
  31  *
  32  *  Author: Andrew Tridgell
  33  */
  34
  35 #define TEVENT_DEPRECATED 1
  36 #include "ldb_private.h"
  37
  38 static int ldb_context_destructor(void *ptr)
  39 {
  40         struct ldb_context *ldb = talloc_get_type(ptr, struct ldb_context);
  41
  42         if (ldb->transaction_active) {
  43                 ldb_debug(ldb, LDB_DEBUG_FATAL,
  44                           "A transaction is still active in ldb context [%p]",
  45                           ldb);
  46         }
  47
  48         return 0;
  49 }
  50
  51 /*
  52   this is used to catch debug messages from events
  53 */
  54 static void ldb_tevent_debug(void *context, enum tevent_debug_level level,
  55                              const char *fmt, va_list ap)  PRINTF_ATTRIBUTE(3,0);
  56
  57 static void ldb_tevent_debug(void *context, enum tevent_debug_level level,
  58                              const char *fmt, va_list ap)
  59 {
  60         struct ldb_context *ldb = talloc_get_type(context, struct ldb_context);
  61         enum ldb_debug_level ldb_level = LDB_DEBUG_FATAL;
  62         char *s = NULL;
  63
  64         switch (level) {
  65         case TEVENT_DEBUG_FATAL:
  66                 ldb_level = LDB_DEBUG_FATAL;
  67                 break;
  68         case TEVENT_DEBUG_ERROR:
  69                 ldb_level = LDB_DEBUG_ERROR;
  70                 break;
  71         case TEVENT_DEBUG_WARNING:
  72                 ldb_level = LDB_DEBUG_WARNING;
  73                 break;
  74         case TEVENT_DEBUG_TRACE:
  75                 ldb_level = LDB_DEBUG_TRACE;
  76                 break;
  77         };
  78
  79         vasprintf(&s, fmt, ap);
  80         if (!s) return;
  81         ldb_debug(ldb, ldb_level, "tevent: %s", s);
  82         free(s);
  83 }
  84
  85 /*
  86    initialise a ldb context
  87    The mem_ctx is required
  88    The event_ctx is required
  89 */
  90 struct ldb_context *ldb_init(TALLOC_CTX *mem_ctx, struct tevent_context *ev_ctx)
  91 {
  92         struct ldb_context *ldb;
  93         int ret;
  94
  95         ldb = talloc_zero(mem_ctx, struct ldb_context);
  96         /* FIXME: Hack a new event context so that CMD line utilities work
  97          * until we have them all converted */
  98         if (ev_ctx == NULL) {
  99                 ev_ctx = tevent_context_init(talloc_autofree_context());
 100                 tevent_set_debug(ev_ctx, ldb_tevent_debug, ldb);
 101                 tevent_loop_allow_nesting(ev_ctx);
 102         }
 103
 104         ret = ldb_setup_wellknown_attributes(ldb);
 105         if (ret != 0) {
 106                 talloc_free(ldb);
 107                 return NULL;
 108         }
 109
 110         ldb_set_utf8_default(ldb);
 111         ldb_set_create_perms(ldb, 0666);
 112         ldb_set_modules_dir(ldb, LDB_MODULESDIR);
 113         ldb_set_event_context(ldb, ev_ctx);
 114
 115         /* TODO: get timeout from options if available there */
 116         ldb->default_timeout = 300; /* set default to 5 minutes */
 117
 118         talloc_set_destructor((TALLOC_CTX *)ldb, ldb_context_destructor);
 119
 120         return ldb;
 121 }
 122
 123 /*
 124   try to autodetect a basedn if none specified. This fixes one of my
 125   pet hates about ldapsearch, which is that you have to get a long,
 126   complex basedn right to make any use of it.
 127 */
 128 void ldb_set_default_dns(struct ldb_context *ldb)
 129 {
 130         TALLOC_CTX *tmp_ctx;
 131         int ret;
 132         struct ldb_result *res;
 133         struct ldb_dn *tmp_dn=NULL;
 134         static const char *attrs[] = {
 135                 "rootDomainNamingContext",
 136                 "configurationNamingContext",
 137                 "schemaNamingContext",
 138                 "defaultNamingContext",
 139                 NULL
 140         };
 141
 142         tmp_ctx = talloc_new(ldb);
 143         ret = ldb_search(ldb, tmp_ctx, &res, ldb_dn_new(tmp_ctx, ldb, NULL),
 144                          LDB_SCOPE_BASE, attrs, "(objectClass=*)");
 145         if (ret != LDB_SUCCESS) {
 146                 talloc_free(tmp_ctx);
 147                 return;
 148         }
 149
 150         if (res->count != 1) {
 151                 talloc_free(tmp_ctx);
 152                 return;
 153         }
 154
 155         if (!ldb_get_opaque(ldb, "rootDomainNamingContext")) {
 156                 tmp_dn = ldb_msg_find_attr_as_dn(ldb, ldb, res->msgs[0],
 157                                                  "rootDomainNamingContext");
 158                 ldb_set_opaque(ldb, "rootDomainNamingContext", tmp_dn);
 159         }
 160
 161         if (!ldb_get_opaque(ldb, "configurationNamingContext")) {
 162                 tmp_dn = ldb_msg_find_attr_as_dn(ldb, ldb, res->msgs[0],
 163                                                  "configurationNamingContext");
 164                 ldb_set_opaque(ldb, "configurationNamingContext", tmp_dn);
 165         }
 166
 167         if (!ldb_get_opaque(ldb, "schemaNamingContext")) {
 168                 tmp_dn = ldb_msg_find_attr_as_dn(ldb, ldb, res->msgs[0],
 169                                                  "schemaNamingContext");
 170                 ldb_set_opaque(ldb, "schemaNamingContext", tmp_dn);
 171         }
 172
 173         if (!ldb_get_opaque(ldb, "defaultNamingContext")) {
 174                 tmp_dn = ldb_msg_find_attr_as_dn(ldb, ldb, res->msgs[0],
 175                                                  "defaultNamingContext");
 176                 ldb_set_opaque(ldb, "defaultNamingContext", tmp_dn);
 177         }
 178
 179         talloc_free(tmp_ctx);
 180 }
 181
 182 struct ldb_dn *ldb_get_root_basedn(struct ldb_context *ldb)
 183 {
 184         void *opaque = ldb_get_opaque(ldb, "rootDomainNamingContext");
 185         return talloc_get_type(opaque, struct ldb_dn);
 186 }
 187
 188 struct ldb_dn *ldb_get_config_basedn(struct ldb_context *ldb)
 189 {
 190         void *opaque = ldb_get_opaque(ldb, "configurationNamingContext");
 191         return talloc_get_type(opaque, struct ldb_dn);
 192 }
 193
 194 struct ldb_dn *ldb_get_schema_basedn(struct ldb_context *ldb)
 195 {
 196         void *opaque = ldb_get_opaque(ldb, "schemaNamingContext");
 197         return talloc_get_type(opaque, struct ldb_dn);
 198 }
 199
 200 struct ldb_dn *ldb_get_default_basedn(struct ldb_context *ldb)
 201 {
 202         void *opaque = ldb_get_opaque(ldb, "defaultNamingContext");
 203         return talloc_get_type(opaque, struct ldb_dn);
 204 }
 205
 206 /*
 207    connect to a database. The URL can either be one of the following forms
 208    ldb://path
 209    ldapi://path
 210
 211    flags is made up of LDB_FLG_*
 212
 213    the options are passed uninterpreted to the backend, and are
 214    backend specific
 215 */
 216 int ldb_connect(struct ldb_context *ldb, const char *url,
 217                 unsigned int flags, const char *options[])
 218 {
 219         int ret;
 220         const char *url2;
 221         /* We seem to need to do this here, or else some utilities don't
 222          * get ldb backends */
 223
 224         ldb->flags = flags;
 225
 226         url2 = talloc_strdup(ldb, url);
 227         if (!url2) {
 228                 ldb_oom(ldb);
 229                 return LDB_ERR_OPERATIONS_ERROR;
 230         }
 231         ret = ldb_set_opaque(ldb, "ldb_url", talloc_strdup(ldb, url2));
 232         if (ret != LDB_SUCCESS) {
 233                 return ret;
 234         }
 235
 236         ret = ldb_connect_backend(ldb, url, options, &ldb->modules);
 237         if (ret != LDB_SUCCESS) {
 238                 return ret;
 239         }
 240
 241         if (ldb_load_modules(ldb, options) != LDB_SUCCESS) {
 242                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 243                           "Unable to load modules for %s: %s",
 244                           url, ldb_errstring(ldb));
 245                 return LDB_ERR_OTHER;
 246         }
 247
 248         /* set the default base dn */
 249         ldb_set_default_dns(ldb);
 250
 251         return LDB_SUCCESS;
 252 }
 253
 254 void ldb_set_errstring(struct ldb_context *ldb, const char *err_string)
 255 {
 256         if (ldb->err_string) {
 257                 talloc_free(ldb->err_string);
 258         }
 259         ldb->err_string = talloc_strdup(ldb, err_string);
 260 }
 261
 262 void ldb_asprintf_errstring(struct ldb_context *ldb, const char *format, ...)
 263 {
 264         va_list ap;
 265         char *old_string = NULL;
 266
 267         if (ldb->err_string) {
 268                 old_string = ldb->err_string;
 269         }
 270
 271         va_start(ap, format);
 272         ldb->err_string = talloc_vasprintf(ldb, format, ap);
 273         va_end(ap);
 274         talloc_free(old_string);
 275 }
 276
 277 void ldb_reset_err_string(struct ldb_context *ldb)
 278 {
 279         if (ldb->err_string) {
 280                 talloc_free(ldb->err_string);
 281                 ldb->err_string = NULL;
 282         }
 283 }
 284
 285 #define FIRST_OP_NOERR(ldb, op) do { \
 286         module = ldb->modules;                                  \
 287         while (module && module->ops->op == NULL) module = module->next; \
 288 } while (0)
 289
 290 #define FIRST_OP(ldb, op) do { \
 291         FIRST_OP_NOERR(ldb, op); \
 292         if (module == NULL) {                                   \
 293                 ldb_asprintf_errstring(ldb, "unable to find module or backend to handle operation: " #op); \
 294                 return LDB_ERR_OPERATIONS_ERROR;                        \
 295         } \
 296 } while (0)
 297
 298
 299 /*
 300   start a transaction
 301 */
 302 int ldb_transaction_start(struct ldb_context *ldb)
 303 {
 304         struct ldb_module *module;
 305         int status;
 306
 307         ldb_debug(ldb, LDB_DEBUG_TRACE,
 308                   "start ldb transaction (nesting: %d)",
 309                   ldb->transaction_active);
 310
 311         /* explicit transaction active, count nested requests */
 312         if (ldb->transaction_active) {
 313                 ldb->transaction_active++;
 314                 return LDB_SUCCESS;
 315         }
 316
 317         /* start a new transaction */
 318         ldb->transaction_active++;
 319         ldb->prepare_commit_done = false;
 320
 321         FIRST_OP(ldb, start_transaction);
 322
 323         ldb_reset_err_string(ldb);
 324
 325         status = module->ops->start_transaction(module);
 326         if (status != LDB_SUCCESS) {
 327                 if (ldb->err_string == NULL) {
 328                         /* no error string was setup by the backend */
 329                         ldb_asprintf_errstring(ldb,
 330                                 "ldb transaction start: %s (%d)",
 331                                 ldb_strerror(status),
 332                                 status);
 333                 }
 334         }
 335         return status;
 336 }
 337
 338 /*
 339   prepare for transaction commit (first phase of two phase commit)
 340 */
 341 int ldb_transaction_prepare_commit(struct ldb_context *ldb)
 342 {
 343         struct ldb_module *module;
 344         int status;
 345
 346         if (ldb->prepare_commit_done) {
 347                 return LDB_SUCCESS;
 348         }
 349
 350         /* commit only when all nested transactions are complete */
 351         if (ldb->transaction_active > 1) {
 352                 return LDB_SUCCESS;
 353         }
 354
 355         ldb->prepare_commit_done = true;
 356
 357         if (ldb->transaction_active < 0) {
 358                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 359                           "prepare commit called but no ldb transactions are active!");
 360                 ldb->transaction_active = 0;
 361                 return LDB_ERR_OPERATIONS_ERROR;
 362         }
 363
 364         /* call prepare transaction if available */
 365         FIRST_OP_NOERR(ldb, prepare_commit);
 366         if (module == NULL) {
 367                 return LDB_SUCCESS;
 368         }
 369
 370         status = module->ops->prepare_commit(module);
 371         if (status != LDB_SUCCESS) {
 372                 /* if a module fails the prepare then we need
 373                    to call the end transaction for everyone */
 374                 FIRST_OP(ldb, end_transaction);
 375                 module->ops->end_transaction(module);
 376                 if (ldb->err_string == NULL) {
 377                         /* no error string was setup by the backend */
 378                         ldb_asprintf_errstring(ldb,
 379                                                "ldb transaction prepare commit: %s (%d)",
 380                                                ldb_strerror(status),
 381                                                status);
 382                 }
 383         }
 384
 385         return status;
 386 }
 387
 388
 389 /*
 390   commit a transaction
 391 */
 392 int ldb_transaction_commit(struct ldb_context *ldb)
 393 {
 394         struct ldb_module *module;
 395         int status;
 396
 397         status = ldb_transaction_prepare_commit(ldb);
 398         if (status != LDB_SUCCESS) {
 399                 return status;
 400         }
 401
 402         ldb->transaction_active--;
 403
 404         ldb_debug(ldb, LDB_DEBUG_TRACE,
 405                   "commit ldb transaction (nesting: %d)",
 406                   ldb->transaction_active);
 407
 408         /* commit only when all nested transactions are complete */
 409         if (ldb->transaction_active > 0) {
 410                 return LDB_SUCCESS;
 411         }
 412
 413         if (ldb->transaction_active < 0) {
 414                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 415                           "commit called but no ldb transactions are active!");
 416                 ldb->transaction_active = 0;
 417                 return LDB_ERR_OPERATIONS_ERROR;
 418         }
 419
 420         ldb_reset_err_string(ldb);
 421
 422         FIRST_OP(ldb, end_transaction);
 423         status = module->ops->end_transaction(module);
 424         if (status != LDB_SUCCESS) {
 425                 if (ldb->err_string == NULL) {
 426                         /* no error string was setup by the backend */
 427                         ldb_asprintf_errstring(ldb,
 428                                 "ldb transaction commit: %s (%d)",
 429                                 ldb_strerror(status),
 430                                 status);
 431                 }
 432                 /* cancel the transaction */
 433                 FIRST_OP(ldb, del_transaction);
 434                 module->ops->del_transaction(module);
 435         }
 436         return status;
 437 }
 438
 439
 440 /*
 441   cancel a transaction
 442 */
 443 int ldb_transaction_cancel(struct ldb_context *ldb)
 444 {
 445         struct ldb_module *module;
 446         int status;
 447
 448         ldb->transaction_active--;
 449
 450         ldb_debug(ldb, LDB_DEBUG_TRACE,
 451                   "cancel ldb transaction (nesting: %d)",
 452                   ldb->transaction_active);
 453
 454         /* really cancel only if all nested transactions are complete */
 455         if (ldb->transaction_active > 0) {
 456                 return LDB_SUCCESS;
 457         }
 458
 459         if (ldb->transaction_active < 0) {
 460                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 461                           "cancel called but no ldb transactions are active!");
 462                 ldb->transaction_active = 0;
 463                 return LDB_ERR_OPERATIONS_ERROR;
 464         }
 465
 466         FIRST_OP(ldb, del_transaction);
 467
 468         status = module->ops->del_transaction(module);
 469         if (status != LDB_SUCCESS) {
 470                 if (ldb->err_string == NULL) {
 471                         /* no error string was setup by the backend */
 472                         ldb_asprintf_errstring(ldb,
 473                                 "ldb transaction cancel: %s (%d)",
 474                                 ldb_strerror(status),
 475                                 status);
 476                 }
 477         }
 478         return status;
 479 }
 480
 481 /* autostarts a transacion if none active */
 482 static int ldb_autotransaction_request(struct ldb_context *ldb,
 483                                        struct ldb_request *req)
 484 {
 485         int ret;
 486
 487         ret = ldb_transaction_start(ldb);
 488         if (ret != LDB_SUCCESS) {
 489                 return ret;
 490         }
 491
 492         ret = ldb_request(ldb, req);
 493         if (ret == LDB_SUCCESS) {
 494                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 495         }
 496
 497         if (ret == LDB_SUCCESS) {
 498                 return ldb_transaction_commit(ldb);
 499         }
 500         ldb_transaction_cancel(ldb);
 501
 502         if (ldb->err_string == NULL) {
 503                 /* no error string was setup by the backend */
 504                 ldb_asprintf_errstring(ldb, "%s (%d)", ldb_strerror(ret), ret);
 505         }
 506
 507         return ret;
 508 }
 509
 510 int ldb_wait(struct ldb_handle *handle, enum ldb_wait_type type)
 511 {
 512         struct tevent_context *ev;
 513         int ret;
 514
 515         if (!handle) {
 516                 return LDB_ERR_UNAVAILABLE;
 517         }
 518
 519         if (handle->state == LDB_ASYNC_DONE) {
 520                 return handle->status;
 521         }
 522
 523         ev = ldb_get_event_context(handle->ldb);
 524         if (NULL == ev) {
 525                 return LDB_ERR_OPERATIONS_ERROR;
 526         }
 527
 528         switch (type) {
 529         case LDB_WAIT_NONE:
 530                 ret = tevent_loop_once(ev);
 531                 if (ret != 0) {
 532                         return LDB_ERR_OPERATIONS_ERROR;
 533                 }
 534                 if (handle->state == LDB_ASYNC_DONE ||
 535                     handle->status != LDB_SUCCESS) {
 536                         return handle->status;
 537                 }
 538                 break;
 539
 540         case LDB_WAIT_ALL:
 541                 while (handle->state != LDB_ASYNC_DONE) {
 542                         ret = tevent_loop_once(ev);
 543                         if (ret != 0) {
 544                                 return LDB_ERR_OPERATIONS_ERROR;
 545                         }
 546                         if (handle->status != LDB_SUCCESS) {
 547                                 return handle->status;
 548                         }
 549                 }
 550                 return handle->status;
 551         }
 552
 553         return LDB_SUCCESS;
 554 }
 555
 556 /* set the specified timeout or, if timeout is 0 set the default timeout */
 557 int ldb_set_timeout(struct ldb_context *ldb,
 558                     struct ldb_request *req,
 559                     int timeout)
 560 {
 561         if (req == NULL) return LDB_ERR_OPERATIONS_ERROR;
 562
 563         if (timeout != 0) {
 564                 req->timeout = timeout;
 565         } else {
 566                 req->timeout = ldb->default_timeout;
 567         }
 568         req->starttime = time(NULL);
 569
 570         return LDB_SUCCESS;
 571 }
 572
 573 /* calculates the new timeout based on the previous starttime and timeout */
 574 int ldb_set_timeout_from_prev_req(struct ldb_context *ldb,
 575                                   struct ldb_request *oldreq,
 576                                   struct ldb_request *newreq)
 577 {
 578         if (newreq == NULL) return LDB_ERR_OPERATIONS_ERROR;
 579
 580         if (oldreq == NULL) {
 581                 return ldb_set_timeout(ldb, newreq, 0);
 582         }
 583
 584         newreq->starttime = oldreq->starttime;
 585         newreq->timeout = oldreq->timeout;
 586
 587         return LDB_SUCCESS;
 588 }
 589
 590
 591 /*
 592    set the permissions for new files to be passed to open() in
 593    backends that use local files
 594  */
 595 void ldb_set_create_perms(struct ldb_context *ldb, unsigned int perms)
 596 {
 597         ldb->create_perms = perms;
 598 }
 599
 600 unsigned int ldb_get_create_perms(struct ldb_context *ldb)
 601 {
 602         return ldb->create_perms;
 603 }
 604
 605 void ldb_set_event_context(struct ldb_context *ldb, struct tevent_context *ev)
 606 {
 607         ldb->ev_ctx = ev;
 608 }
 609
 610 struct tevent_context * ldb_get_event_context(struct ldb_context *ldb)
 611 {
 612         return ldb->ev_ctx;
 613 }
 614
 615 void ldb_request_set_state(struct ldb_request *req, int state)
 616 {
 617         req->handle->state = state;
 618 }
 619
 620 int ldb_request_get_status(struct ldb_request *req)
 621 {
 622         return req->handle->status;
 623 }
 624
 625 /*
 626   start an ldb request
 627   NOTE: the request must be a talloc context.
 628   returns LDB_ERR_* on errors.
 629 */
 630 int ldb_request(struct ldb_context *ldb, struct ldb_request *req)
 631 {
 632         struct ldb_module *module;
 633         int ret;
 634
 635         if (req->callback == NULL) {
 636                 ldb_set_errstring(ldb, "Requests MUST define callbacks");
 637                 return LDB_ERR_UNWILLING_TO_PERFORM;
 638         }
 639
 640         ldb_reset_err_string(ldb);
 641
 642         /* call the first module in the chain */
 643         switch (req->operation) {
 644         case LDB_SEARCH:
 645                 FIRST_OP(ldb, search);
 646                 ret = module->ops->search(module, req);
 647                 break;
 648         case LDB_ADD:
 649                 FIRST_OP(ldb, add);
 650                 ret = module->ops->add(module, req);
 651                 break;
 652         case LDB_MODIFY:
 653                 FIRST_OP(ldb, modify);
 654                 ret = module->ops->modify(module, req);
 655                 break;
 656         case LDB_DELETE:
 657                 FIRST_OP(ldb, del);
 658                 ret = module->ops->del(module, req);
 659                 break;
 660         case LDB_RENAME:
 661                 FIRST_OP(ldb, rename);
 662                 ret = module->ops->rename(module, req);
 663                 break;
 664         case LDB_EXTENDED:
 665                 FIRST_OP(ldb, extended);
 666                 ret = module->ops->extended(module, req);
 667                 break;
 668         default:
 669                 FIRST_OP(ldb, request);
 670                 ret = module->ops->request(module, req);
 671                 break;
 672         }
 673
 674         return ret;
 675 }
 676
 677 int ldb_request_done(struct ldb_request *req, int status)
 678 {
 679         req->handle->state = LDB_ASYNC_DONE;
 680         req->handle->status = status;
 681         return status;
 682 }
 683
 684 /*
 685   search the database given a LDAP-like search expression
 686
 687   returns an LDB error code
 688
 689   Use talloc_free to free the ldb_message returned in 'res', if successful
 690
 691 */
 692 int ldb_search_default_callback(struct ldb_request *req,
 693                                 struct ldb_reply *ares)
 694 {
 695         struct ldb_result *res;
 696         int n;
 697
 698         res = talloc_get_type(req->context, struct ldb_result);
 699
 700         if (!ares) {
 701                 return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
 702         }
 703         if (ares->error != LDB_SUCCESS) {
 704                 return ldb_request_done(req, ares->error);
 705         }
 706
 707         switch (ares->type) {
 708         case LDB_REPLY_ENTRY:
 709                 res->msgs = talloc_realloc(res, res->msgs,
 710                                         struct ldb_message *, res->count + 2);
 711                 if (! res->msgs) {
 712                         return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
 713                 }
 714
 715                 res->msgs[res->count + 1] = NULL;
 716
 717                 res->msgs[res->count] = talloc_move(res->msgs, &ares->message);
 718                 res->count++;
 719                 break;
 720
 721         case LDB_REPLY_REFERRAL:
 722                 if (res->refs) {
 723                         for (n = 0; res->refs[n]; n++) /*noop*/ ;
 724                 } else {
 725                         n = 0;
 726                 }
 727
 728                 res->refs = talloc_realloc(res, res->refs, char *, n + 2);
 729                 if (! res->refs) {
 730                         return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
 731                 }
 732
 733                 res->refs[n] = talloc_move(res->refs, &ares->referral);
 734                 res->refs[n + 1] = NULL;
 735                 break;
 736
 737         case LDB_REPLY_DONE:
 738                 /* TODO: we should really support controls on entries
 739                  * and referrals too! */
 740                 res->controls = talloc_move(res, &ares->controls);
 741
 742                 /* this is the last message, and means the request is done */
 743                 /* we have to signal and eventual ldb_wait() waiting that the
 744                  * async request operation was completed */
 745                 talloc_free(ares);
 746                 return ldb_request_done(req, LDB_SUCCESS);
 747         }
 748
 749         talloc_free(ares);
 750
 751         return LDB_SUCCESS;
 752 }
 753
 754 int ldb_op_default_callback(struct ldb_request *req, struct ldb_reply *ares)
 755 {
 756         int ret;
 757
 758         if (!ares) {
 759                 return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
 760         }
 761
 762         if (ares->error != LDB_SUCCESS) {
 763                 ret = ares->error;
 764                 talloc_free(ares);
 765                 return ldb_request_done(req, ret);
 766         }
 767
 768         if (ares->type != LDB_REPLY_DONE) {
 769                 talloc_free(ares);
 770                 ldb_set_errstring(req->handle->ldb, "Invalid reply type!");
 771                 return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
 772         }
 773
 774         talloc_free(ares);
 775         return ldb_request_done(req, LDB_SUCCESS);
 776 }
 777
 778 int ldb_build_search_req_ex(struct ldb_request **ret_req,
 779                         struct ldb_context *ldb,
 780                         void *mem_ctx,
 781                         struct ldb_dn *base,
 782                         enum ldb_scope scope,
 783                         struct ldb_parse_tree *tree,
 784                         const char * const *attrs,
 785                         struct ldb_control **controls,
 786                         void *context,
 787                         ldb_request_callback_t callback,
 788                         struct ldb_request *parent)
 789 {
 790         struct ldb_request *req;
 791
 792         *ret_req = NULL;
 793
 794         req = talloc(mem_ctx, struct ldb_request);
 795         if (req == NULL) {
 796                 ldb_oom(ldb);
 797                 return LDB_ERR_OPERATIONS_ERROR;
 798         }
 799
 800         req->operation = LDB_SEARCH;
 801         if (base == NULL) {
 802                 req->op.search.base = ldb_dn_new(req, ldb, NULL);
 803         } else {
 804                 req->op.search.base = base;
 805         }
 806         req->op.search.scope = scope;
 807
 808         req->op.search.tree = tree;
 809         if (req->op.search.tree == NULL) {
 810                 ldb_set_errstring(ldb, "'tree' can't be NULL");
 811                 talloc_free(req);
 812                 return LDB_ERR_OPERATIONS_ERROR;
 813         }
 814
 815         req->op.search.attrs = attrs;
 816         req->controls = controls;
 817         req->context = context;
 818         req->callback = callback;
 819
 820         ldb_set_timeout_from_prev_req(ldb, parent, req);
 821
 822         req->handle = ldb_handle_new(req, ldb);
 823         if (req->handle == NULL) {
 824                 ldb_oom(ldb);
 825                 return LDB_ERR_OPERATIONS_ERROR;
 826         }
 827
 828         *ret_req = req;
 829         return LDB_SUCCESS;
 830 }
 831
 832 int ldb_build_search_req(struct ldb_request **ret_req,
 833                         struct ldb_context *ldb,
 834                         void *mem_ctx,
 835                         struct ldb_dn *base,
 836                         enum ldb_scope scope,
 837                         const char *expression,
 838                         const char * const *attrs,
 839                         struct ldb_control **controls,
 840                         void *context,
 841                         ldb_request_callback_t callback,
 842                         struct ldb_request *parent)
 843 {
 844         struct ldb_parse_tree *tree;
 845         int ret;
 846
 847         tree = ldb_parse_tree(mem_ctx, expression);
 848         if (tree == NULL) {
 849                 ldb_set_errstring(ldb, "Unable to parse search expression");
 850                 return LDB_ERR_OPERATIONS_ERROR;
 851         }
 852
 853         ret = ldb_build_search_req_ex(ret_req, ldb, mem_ctx, base,
 854                                       scope, tree, attrs, controls,
 855                                       context, callback, parent);
 856         if (ret == LDB_SUCCESS) {
 857                 talloc_steal(*ret_req, tree);
 858         }
 859         return ret;
 860 }
 861
 862 int ldb_build_add_req(struct ldb_request **ret_req,
 863                         struct ldb_context *ldb,
 864                         void *mem_ctx,
 865                         const struct ldb_message *message,
 866                         struct ldb_control **controls,
 867                         void *context,
 868                         ldb_request_callback_t callback,
 869                         struct ldb_request *parent)
 870 {
 871         struct ldb_request *req;
 872
 873         *ret_req = NULL;
 874
 875         req = talloc(mem_ctx, struct ldb_request);
 876         if (req == NULL) {
 877                 ldb_set_errstring(ldb, "Out of Memory");
 878                 return LDB_ERR_OPERATIONS_ERROR;
 879         }
 880
 881         req->operation = LDB_ADD;
 882         req->op.add.message = message;
 883         req->controls = controls;
 884         req->context = context;
 885         req->callback = callback;
 886
 887         ldb_set_timeout_from_prev_req(ldb, parent, req);
 888
 889         req->handle = ldb_handle_new(req, ldb);
 890         if (req->handle == NULL) {
 891                 ldb_oom(ldb);
 892                 return LDB_ERR_OPERATIONS_ERROR;
 893         }
 894
 895         *ret_req = req;
 896
 897         return LDB_SUCCESS;
 898 }
 899
 900 int ldb_build_mod_req(struct ldb_request **ret_req,
 901                         struct ldb_context *ldb,
 902                         void *mem_ctx,
 903                         const struct ldb_message *message,
 904                         struct ldb_control **controls,
 905                         void *context,
 906                         ldb_request_callback_t callback,
 907                         struct ldb_request *parent)
 908 {
 909         struct ldb_request *req;
 910
 911         *ret_req = NULL;
 912
 913         req = talloc(mem_ctx, struct ldb_request);
 914         if (req == NULL) {
 915                 ldb_set_errstring(ldb, "Out of Memory");
 916                 return LDB_ERR_OPERATIONS_ERROR;
 917         }
 918
 919         req->operation = LDB_MODIFY;
 920         req->op.mod.message = message;
 921         req->controls = controls;
 922         req->context = context;
 923         req->callback = callback;
 924
 925         ldb_set_timeout_from_prev_req(ldb, parent, req);
 926
 927         req->handle = ldb_handle_new(req, ldb);
 928         if (req->handle == NULL) {
 929                 ldb_oom(ldb);
 930                 return LDB_ERR_OPERATIONS_ERROR;
 931         }
 932
 933         *ret_req = req;
 934
 935         return LDB_SUCCESS;
 936 }
 937
 938 int ldb_build_del_req(struct ldb_request **ret_req,
 939                         struct ldb_context *ldb,
 940                         void *mem_ctx,
 941                         struct ldb_dn *dn,
 942                         struct ldb_control **controls,
 943                         void *context,
 944                         ldb_request_callback_t callback,
 945                         struct ldb_request *parent)
 946 {
 947         struct ldb_request *req;
 948
 949         *ret_req = NULL;
 950
 951         req = talloc(mem_ctx, struct ldb_request);
 952         if (req == NULL) {
 953                 ldb_set_errstring(ldb, "Out of Memory");
 954                 return LDB_ERR_OPERATIONS_ERROR;
 955         }
 956
 957         req->operation = LDB_DELETE;
 958         req->op.del.dn = dn;
 959         req->controls = controls;
 960         req->context = context;
 961         req->callback = callback;
 962
 963         ldb_set_timeout_from_prev_req(ldb, parent, req);
 964
 965         req->handle = ldb_handle_new(req, ldb);
 966         if (req->handle == NULL) {
 967                 ldb_oom(ldb);
 968                 return LDB_ERR_OPERATIONS_ERROR;
 969         }
 970
 971         *ret_req = req;
 972
 973         return LDB_SUCCESS;
 974 }
 975
 976 int ldb_build_rename_req(struct ldb_request **ret_req,
 977                         struct ldb_context *ldb,
 978                         void *mem_ctx,
 979                         struct ldb_dn *olddn,
 980                         struct ldb_dn *newdn,
 981                         struct ldb_control **controls,
 982                         void *context,
 983                         ldb_request_callback_t callback,
 984                         struct ldb_request *parent)
 985 {
 986         struct ldb_request *req;
 987
 988         *ret_req = NULL;
 989
 990         req = talloc(mem_ctx, struct ldb_request);
 991         if (req == NULL) {
 992                 ldb_set_errstring(ldb, "Out of Memory");
 993                 return LDB_ERR_OPERATIONS_ERROR;
 994         }
 995
 996         req->operation = LDB_RENAME;
 997         req->op.rename.olddn = olddn;
 998         req->op.rename.newdn = newdn;
 999         req->controls = controls;
1000         req->context = context;
1001         req->callback = callback;
1002
1003         ldb_set_timeout_from_prev_req(ldb, parent, req);
1004
1005         req->handle = ldb_handle_new(req, ldb);
1006         if (req->handle == NULL) {
1007                 ldb_oom(ldb);
1008                 return LDB_ERR_OPERATIONS_ERROR;
1009         }
1010
1011         *ret_req = req;
1012
1013         return LDB_SUCCESS;
1014 }
1015
1016 int ldb_extended_default_callback(struct ldb_request *req,
1017                                   struct ldb_reply *ares)
1018 {
1019         struct ldb_result *res;
1020
1021         res = talloc_get_type(req->context, struct ldb_result);
1022
1023         if (!ares) {
1024                 return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
1025         }
1026         if (ares->error != LDB_SUCCESS) {
1027                 return ldb_request_done(req, ares->error);
1028         }
1029
1030         if (ares->type == LDB_REPLY_DONE) {
1031
1032                 /* TODO: we should really support controls on entries and referrals too! */
1033                 res->extended = talloc_move(res, &ares->response);
1034                 res->controls = talloc_move(res, &ares->controls);
1035
1036                 talloc_free(ares);
1037                 return ldb_request_done(req, LDB_SUCCESS);
1038         }
1039
1040         talloc_free(ares);
1041         ldb_set_errstring(req->handle->ldb, "Invalid reply type!");
1042         return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
1043 }
1044
1045 int ldb_build_extended_req(struct ldb_request **ret_req,
1046                            struct ldb_context *ldb,
1047                            void *mem_ctx,
1048                            const char *oid,
1049                            void *data,
1050                            struct ldb_control **controls,
1051                            void *context,
1052                            ldb_request_callback_t callback,
1053                            struct ldb_request *parent)
1054 {
1055         struct ldb_request *req;
1056
1057         *ret_req = NULL;
1058
1059         req = talloc(mem_ctx, struct ldb_request);
1060         if (req == NULL) {
1061                 ldb_set_errstring(ldb, "Out of Memory");
1062                 return LDB_ERR_OPERATIONS_ERROR;
1063         }
1064
1065         req->operation = LDB_EXTENDED;
1066         req->op.extended.oid = oid;
1067         req->op.extended.data = data;
1068         req->controls = controls;
1069         req->context = context;
1070         req->callback = callback;
1071
1072         ldb_set_timeout_from_prev_req(ldb, parent, req);
1073
1074         req->handle = ldb_handle_new(req, ldb);
1075         if (req->handle == NULL) {
1076                 ldb_oom(ldb);
1077                 return LDB_ERR_OPERATIONS_ERROR;
1078         }
1079
1080         *ret_req = req;
1081
1082         return LDB_SUCCESS;
1083 }
1084
1085 int ldb_extended(struct ldb_context *ldb,
1086                  const char *oid,
1087                  void *data,
1088                  struct ldb_result **_res)
1089 {
1090         struct ldb_request *req;
1091         int ret;
1092         struct ldb_result *res;
1093
1094         *_res = NULL;
1095
1096         res = talloc_zero(ldb, struct ldb_result);
1097         if (!res) {
1098                 return LDB_ERR_OPERATIONS_ERROR;
1099         }
1100
1101         ret = ldb_build_extended_req(&req, ldb, ldb,
1102                                      oid, data, NULL,
1103                                      res, ldb_extended_default_callback,
1104                                      NULL);
1105         if (ret != LDB_SUCCESS) goto done;
1106
1107         ldb_set_timeout(ldb, req, 0); /* use default timeout */
1108
1109         ret = ldb_request(ldb, req);
1110
1111         if (ret == LDB_SUCCESS) {
1112                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1113         }
1114
1115         talloc_free(req);
1116
1117 done:
1118         if (ret != LDB_SUCCESS) {
1119                 talloc_free(res);
1120         }
1121
1122         *_res = res;
1123         return ret;
1124 }
1125
1126 /*
1127   note that ldb_search() will automatically replace a NULL 'base' value
1128   with the defaultNamingContext from the rootDSE if available.
1129 */
1130 int ldb_search(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
1131                 struct ldb_result **result, struct ldb_dn *base,
1132                 enum ldb_scope scope, const char * const *attrs,
1133                 const char *exp_fmt, ...)
1134 {
1135         struct ldb_request *req;
1136         struct ldb_result *res;
1137         char *expression;
1138         va_list ap;
1139         int ret;
1140
1141         expression = NULL;
1142         *result = NULL;
1143         req = NULL;
1144
1145         res = talloc_zero(mem_ctx, struct ldb_result);
1146         if (!res) {
1147                 return LDB_ERR_OPERATIONS_ERROR;
1148         }
1149
1150         if (exp_fmt) {
1151                 va_start(ap, exp_fmt);
1152                 expression = talloc_vasprintf(mem_ctx, exp_fmt, ap);
1153                 va_end(ap);
1154
1155                 if (!expression) {
1156                         talloc_free(res);
1157                         return LDB_ERR_OPERATIONS_ERROR;
1158                 }
1159         }
1160
1161         ret = ldb_build_search_req(&req, ldb, mem_ctx,
1162                                         base?base:ldb_get_default_basedn(ldb),
1163                                         scope,
1164                                         expression,
1165                                         attrs,
1166                                         NULL,
1167                                         res,
1168                                         ldb_search_default_callback,
1169                                         NULL);
1170
1171         if (ret != LDB_SUCCESS) goto done;
1172
1173         ret = ldb_request(ldb, req);
1174
1175         if (ret == LDB_SUCCESS) {
1176                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
1177         }
1178
1179 done:
1180         if (ret != LDB_SUCCESS) {
1181                 talloc_free(res);
1182                 res = NULL;
1183         }
1184
1185         talloc_free(expression);
1186         talloc_free(req);
1187
1188         *result = res;
1189         return ret;
1190 }
1191
1192 /*
1193   add a record to the database. Will fail if a record with the given class
1194   and key already exists
1195 */
1196 int ldb_add(struct ldb_context *ldb,
1197             const struct ldb_message *message)
1198 {
1199         struct ldb_request *req;
1200         int ret;
1201
1202         ret = ldb_msg_sanity_check(ldb, message);
1203         if (ret != LDB_SUCCESS) {
1204                 return ret;
1205         }
1206
1207         ret = ldb_build_add_req(&req, ldb, ldb,
1208                                         message,
1209                                         NULL,
1210                                         NULL,
1211                                         ldb_op_default_callback,
1212                                         NULL);
1213
1214         if (ret != LDB_SUCCESS) return ret;
1215
1216         /* do request and autostart a transaction */
1217         ret = ldb_autotransaction_request(ldb, req);
1218
1219         talloc_free(req);
1220         return ret;
1221 }
1222
1223 /*
1224   modify the specified attributes of a record
1225 */
1226 int ldb_modify(struct ldb_context *ldb,
1227                const struct ldb_message *message)
1228 {
1229         struct ldb_request *req;
1230         int ret;
1231
1232         ret = ldb_msg_sanity_check(ldb, message);
1233         if (ret != LDB_SUCCESS) {
1234                 return ret;
1235         }
1236
1237         ret = ldb_build_mod_req(&req, ldb, ldb,
1238                                         message,
1239                                         NULL,
1240                                         NULL,
1241                                         ldb_op_default_callback,
1242                                         NULL);
1243
1244         if (ret != LDB_SUCCESS) return ret;
1245
1246         /* do request and autostart a transaction */
1247         ret = ldb_autotransaction_request(ldb, req);
1248
1249         talloc_free(req);
1250         return ret;
1251 }
1252
1253
1254 /*
1255   delete a record from the database
1256 */
1257 int ldb_delete(struct ldb_context *ldb, struct ldb_dn *dn)
1258 {
1259         struct ldb_request *req;
1260         int ret;
1261
1262         ret = ldb_build_del_req(&req, ldb, ldb,
1263                                         dn,
1264                                         NULL,
1265                                         NULL,
1266                                         ldb_op_default_callback,
1267                                         NULL);
1268
1269         if (ret != LDB_SUCCESS) return ret;
1270
1271         /* do request and autostart a transaction */
1272         ret = ldb_autotransaction_request(ldb, req);
1273
1274         talloc_free(req);
1275         return ret;
1276 }
1277
1278 /*
1279   rename a record in the database
1280 */
1281 int ldb_rename(struct ldb_context *ldb,
1282                 struct ldb_dn *olddn, struct ldb_dn *newdn)
1283 {
1284         struct ldb_request *req;
1285         int ret;
1286
1287         ret = ldb_build_rename_req(&req, ldb, ldb,
1288                                         olddn,
1289                                         newdn,
1290                                         NULL,
1291                                         NULL,
1292                                         ldb_op_default_callback,
1293                                         NULL);
1294
1295         if (ret != LDB_SUCCESS) return ret;
1296
1297         /* do request and autostart a transaction */
1298         ret = ldb_autotransaction_request(ldb, req);
1299
1300         talloc_free(req);
1301         return ret;
1302 }
1303
1304
1305 /*
1306   return the global sequence number
1307 */
1308 int ldb_sequence_number(struct ldb_context *ldb,
1309                         enum ldb_sequence_type type, uint64_t *seq_num)
1310 {
1311         struct ldb_seqnum_request *seq;
1312         struct ldb_seqnum_result *seqr;
1313         struct ldb_result *res;
1314         TALLOC_CTX *tmp_ctx;
1315         int ret;
1316
1317         *seq_num = 0;
1318
1319         tmp_ctx = talloc_zero(ldb, struct ldb_request);
1320         if (tmp_ctx == NULL) {
1321                 ldb_set_errstring(ldb, "Out of Memory");
1322                 return LDB_ERR_OPERATIONS_ERROR;
1323         }
1324         seq = talloc_zero(tmp_ctx, struct ldb_seqnum_request);
1325         if (seq == NULL) {
1326                 ldb_set_errstring(ldb, "Out of Memory");
1327                 ret = LDB_ERR_OPERATIONS_ERROR;
1328                 goto done;
1329         }
1330         seq->type = type;
1331
1332         ret = ldb_extended(ldb, LDB_EXTENDED_SEQUENCE_NUMBER, seq, &res);
1333         if (ret != LDB_SUCCESS) {
1334                 goto done;
1335         }
1336         talloc_steal(tmp_ctx, res);
1337
1338         if (strcmp(LDB_EXTENDED_SEQUENCE_NUMBER, res->extended->oid) != 0) {
1339                 ldb_set_errstring(ldb, "Invalid OID in reply");
1340                 ret = LDB_ERR_OPERATIONS_ERROR;
1341                 goto done;
1342         }
1343         seqr = talloc_get_type(res->extended->data,
1344                                 struct ldb_seqnum_result);
1345         *seq_num = seqr->seq_num;
1346
1347 done:
1348         talloc_free(tmp_ctx);
1349         return ret;
1350 }
1351
1352 /*
1353   return extended error information
1354 */
1355 const char *ldb_errstring(struct ldb_context *ldb)
1356 {
1357         if (ldb->err_string) {
1358                 return ldb->err_string;
1359         }
1360
1361         return NULL;
1362 }
1363
1364 /*
1365   return a string explaining what a ldb error constant meancs
1366 */
1367 const char *ldb_strerror(int ldb_err)
1368 {
1369         switch (ldb_err) {
1370         case LDB_SUCCESS:
1371                 return "Success";
1372         case LDB_ERR_OPERATIONS_ERROR:
1373                 return "Operations error";
1374         case LDB_ERR_PROTOCOL_ERROR:
1375                 return "Protocol error";
1376         case LDB_ERR_TIME_LIMIT_EXCEEDED:
1377                 return "Time limit exceeded";
1378         case LDB_ERR_SIZE_LIMIT_EXCEEDED:
1379                 return "Size limit exceeded";
1380         case LDB_ERR_COMPARE_FALSE:
1381                 return "Compare false";
1382         case LDB_ERR_COMPARE_TRUE:
1383                 return "Compare true";
1384         case LDB_ERR_AUTH_METHOD_NOT_SUPPORTED:
1385                 return "Auth method not supported";
1386         case LDB_ERR_STRONG_AUTH_REQUIRED:
1387                 return "Strong auth required";
1388 /* 9 RESERVED */
1389         case LDB_ERR_REFERRAL:
1390                 return "Referral error";
1391         case LDB_ERR_ADMIN_LIMIT_EXCEEDED:
1392                 return "Admin limit exceeded";
1393         case LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION:
1394                 return "Unsupported critical extension";
1395         case LDB_ERR_CONFIDENTIALITY_REQUIRED:
1396                 return "Confidentiality required";
1397         case LDB_ERR_SASL_BIND_IN_PROGRESS:
1398                 return "SASL bind in progress";
1399         case LDB_ERR_NO_SUCH_ATTRIBUTE:
1400                 return "No such attribute";
1401         case LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE:
1402                 return "Undefined attribute type";
1403         case LDB_ERR_INAPPROPRIATE_MATCHING:
1404                 return "Inappropriate matching";
1405         case LDB_ERR_CONSTRAINT_VIOLATION:
1406                 return "Constraint violation";
1407         case LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS:
1408                 return "Attribute or value exists";
1409         case LDB_ERR_INVALID_ATTRIBUTE_SYNTAX:
1410                 return "Invalid attribute syntax";
1411 /* 22-31 unused */
1412         case LDB_ERR_NO_SUCH_OBJECT:
1413                 return "No such object";
1414         case LDB_ERR_ALIAS_PROBLEM:
1415                 return "Alias problem";
1416         case LDB_ERR_INVALID_DN_SYNTAX:
1417                 return "Invalid DN syntax";
1418 /* 35 RESERVED */
1419         case LDB_ERR_ALIAS_DEREFERENCING_PROBLEM:
1420                 return "Alias dereferencing problem";
1421 /* 37-47 unused */
1422         case LDB_ERR_INAPPROPRIATE_AUTHENTICATION:
1423                 return "Inappropriate authentication";
1424         case LDB_ERR_INVALID_CREDENTIALS:
1425                 return "Invalid credentials";
1426         case LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS:
1427                 return "insufficient access rights";
1428         case LDB_ERR_BUSY:
1429                 return "Busy";
1430         case LDB_ERR_UNAVAILABLE:
1431                 return "Unavailable";
1432         case LDB_ERR_UNWILLING_TO_PERFORM:
1433                 return "Unwilling to perform";
1434         case LDB_ERR_LOOP_DETECT:
1435                 return "Loop detect";
1436 /* 55-63 unused */
1437         case LDB_ERR_NAMING_VIOLATION:
1438                 return "Naming violation";
1439         case LDB_ERR_OBJECT_CLASS_VIOLATION:
1440                 return "Object class violation";
1441         case LDB_ERR_NOT_ALLOWED_ON_NON_LEAF:
1442                 return "Not allowed on non-leaf";
1443         case LDB_ERR_NOT_ALLOWED_ON_RDN:
1444                 return "Not allowed on RDN";
1445         case LDB_ERR_ENTRY_ALREADY_EXISTS:
1446                 return "Entry already exists";
1447         case LDB_ERR_OBJECT_CLASS_MODS_PROHIBITED:
1448                 return "Object class mods prohibited";
1449 /* 70 RESERVED FOR CLDAP */
1450         case LDB_ERR_AFFECTS_MULTIPLE_DSAS:
1451                 return "Affects multiple DSAs";
1452 /* 72-79 unused */
1453         case LDB_ERR_OTHER:
1454                 return "Other";
1455         }
1456
1457         return "Unknown error";
1458 }
1459
1460 /*
1461   set backend specific opaque parameters
1462 */
1463 int ldb_set_opaque(struct ldb_context *ldb, const char *name, void *value)
1464 {
1465         struct ldb_opaque *o;
1466
1467         /* allow updating an existing value */
1468         for (o=ldb->opaque;o;o=o->next) {
1469                 if (strcmp(o->name, name) == 0) {
1470                         o->value = value;
1471                         return LDB_SUCCESS;
1472                 }
1473         }
1474
1475         o = talloc(ldb, struct ldb_opaque);
1476         if (o == NULL) {
1477                 ldb_oom(ldb);
1478                 return LDB_ERR_OTHER;
1479         }
1480         o->next = ldb->opaque;
1481         o->name = name;
1482         o->value = value;
1483         ldb->opaque = o;
1484         return LDB_SUCCESS;
1485 }
1486
1487 /*
1488   get a previously set opaque value
1489 */
1490 void *ldb_get_opaque(struct ldb_context *ldb, const char *name)
1491 {
1492         struct ldb_opaque *o;
1493         for (o=ldb->opaque;o;o=o->next) {
1494                 if (strcmp(o->name, name) == 0) {
1495                         return o->value;
1496                 }
1497         }
1498         return NULL;
1499 }
1500
1501 int ldb_global_init(void)
1502 {
1503         /* Provided for compatibility with some older versions of ldb */
1504         return 0;
1505 }
1506
1507 /* return the ldb flags */
1508 unsigned int ldb_get_flags(struct ldb_context *ldb)
1509 {
1510         return ldb->flags;
1511 }