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