source4/lib/ldb/ldb_ildap/ldb_ildap.c

   1 /*
   2    ldb database library - ildap backend
   3
   4    Copyright (C) Andrew Tridgell  2005
   5    Copyright (C) Simo Sorce       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_ildap
  27  *
  28  *  Component: ldb ildap backend
  29  *
  30  *  Description: This is a ldb backend for the internal ldap
  31  *  client library in Samba4. By using this backend we are
  32  *  independent of a system ldap library
  33  *
  34  *  Author: Andrew Tridgell
  35  *
  36  *  Modifications:
  37  *
  38  *  - description: make the module use asyncronous calls
  39  *    date: Feb 2006
  40  *    author: Simo Sorce
  41  */
  42
  43
  44 #include "includes.h"
  45 #include "ldb_includes.h"
  46
  47 #include "lib/events/events.h"
  48 #include "libcli/ldap/ldap.h"
  49 #include "libcli/ldap/ldap_client.h"
  50 #include "auth/auth.h"
  51 #include "auth/credentials/credentials.h"
  52 #include "param/param.h"
  53
  54 struct ildb_private {
  55         struct ldap_connection *ldap;
  56         struct ldb_module *module;
  57 };
  58
  59 struct ildb_context {
  60         struct ildb_private *ildb;
  61         struct ldb_handle *handle;
  62         struct ldap_request *req;
  63         void *context;
  64         int (*callback)(struct ldb_context *, void *, struct ldb_reply *);
  65 };
  66
  67 /*
  68   convert a ldb_message structure to a list of ldap_mod structures
  69   ready for ildap_add() or ildap_modify()
  70 */
  71 static struct ldap_mod **ildb_msg_to_mods(void *mem_ctx, int *num_mods,
  72                                           const struct ldb_message *msg,
  73                                           int use_flags)
  74 {
  75         struct ldap_mod **mods;
  76         unsigned int i;
  77         int n = 0;
  78
  79         /* allocate maximum number of elements needed */
  80         mods = talloc_array(mem_ctx, struct ldap_mod *, msg->num_elements+1);
  81         if (!mods) {
  82                 errno = ENOMEM;
  83                 return NULL;
  84         }
  85         mods[0] = NULL;
  86
  87         for (i = 0; i < msg->num_elements; i++) {
  88                 const struct ldb_message_element *el = &msg->elements[i];
  89
  90                 mods[n] = talloc(mods, struct ldap_mod);
  91                 if (!mods[n]) {
  92                         goto failed;
  93                 }
  94                 mods[n + 1] = NULL;
  95                 mods[n]->type = 0;
  96                 mods[n]->attrib = *el;
  97                 if (use_flags) {
  98                         switch (el->flags & LDB_FLAG_MOD_MASK) {
  99                         case LDB_FLAG_MOD_ADD:
 100                                 mods[n]->type = LDAP_MODIFY_ADD;
 101                                 break;
 102                         case LDB_FLAG_MOD_DELETE:
 103                                 mods[n]->type = LDAP_MODIFY_DELETE;
 104                                 break;
 105                         case LDB_FLAG_MOD_REPLACE:
 106                                 mods[n]->type = LDAP_MODIFY_REPLACE;
 107                                 break;
 108                         }
 109                 }
 110                 n++;
 111         }
 112
 113         *num_mods = n;
 114         return mods;
 115
 116 failed:
 117         talloc_free(mods);
 118         return NULL;
 119 }
 120
 121
 122 /*
 123   map an ildap NTSTATUS to a ldb error code
 124 */
 125 static int ildb_map_error(struct ildb_private *ildb, NTSTATUS status)
 126 {
 127         TALLOC_CTX *mem_ctx = talloc_new(ildb);
 128         if (NT_STATUS_IS_OK(status)) {
 129                 return LDB_SUCCESS;
 130         }
 131         if (!mem_ctx) {
 132                 ldb_oom(ildb->module->ldb);
 133                 return LDB_ERR_OPERATIONS_ERROR;
 134         }
 135         ldb_set_errstring(ildb->module->ldb,
 136                           ldap_errstr(ildb->ldap, mem_ctx, status));
 137         talloc_free(mem_ctx);
 138         if (NT_STATUS_IS_LDAP(status)) {
 139                 return NT_STATUS_LDAP_CODE(status);
 140         }
 141         return LDB_ERR_OPERATIONS_ERROR;
 142 }
 143
 144 static void ildb_request_timeout(struct event_context *ev,
 145                                  struct timed_event *te,
 146                                  struct timeval t, void *private_data)
 147 {
 148         struct ildb_context *ac;
 149         struct ldb_handle *handle = ac->handle;
 150
 151         ac = talloc_get_type(private_data, struct ildb_context);
 152
 153         if (ac->req->state == LDAP_REQUEST_PENDING) {
 154                 DLIST_REMOVE(ac->req->conn->pending, ac->req);
 155         }
 156
 157         handle->status = LDB_ERR_TIME_LIMIT_EXCEEDED;
 158
 159         return;
 160 }
 161
 162 static void ildb_callback(struct ldap_request *req)
 163 {
 164         struct ildb_context *ac;
 165         struct ldb_handle *handle = ac->handle;
 166         struct ildb_private *ildb = ac->ildb;
 167         NTSTATUS status;
 168         int i;
 169
 170         ac =talloc_get_type(req->async.private_data, struct ildb_context);
 171         handle->status = LDB_SUCCESS;
 172
 173         if (!NT_STATUS_IS_OK(req->status)) {
 174                 handle->status = ildb_map_error(ildb, req->status);
 175                 return;
 176         }
 177
 178         if (req->num_replies < 1) {
 179                 handle->status = LDB_ERR_OPERATIONS_ERROR;
 180                 return;
 181         }
 182
 183         switch (req->type) {
 184
 185         case LDAP_TAG_ModifyRequest:
 186                 if (req->replies[0]->type != LDAP_TAG_ModifyResponse) {
 187                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 188                         return;
 189                 }
 190                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 191                 handle->status = ildb_map_error(ildb, status);
 192                 if (ac->callback && handle->status == LDB_SUCCESS) {
 193                         /* FIXME: build a corresponding ares to pass on */
 194                         handle->status = ac->callback(ac->ildb->module->ldb, ac->context, NULL);
 195                 }
 196                 handle->state = LDB_ASYNC_DONE;
 197                 break;
 198
 199         case LDAP_TAG_AddRequest:
 200                 if (req->replies[0]->type != LDAP_TAG_AddResponse) {
 201                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 202                         return;
 203                 }
 204                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 205                 handle->status = ildb_map_error(ildb, status);
 206                 if (ac->callback && handle->status == LDB_SUCCESS) {
 207                         /* FIXME: build a corresponding ares to pass on */
 208                         handle->status = ac->callback(ac->ildb->module->ldb, ac->context, NULL);
 209                 }
 210                 handle->state = LDB_ASYNC_DONE;
 211                 break;
 212
 213         case LDAP_TAG_DelRequest:
 214                 if (req->replies[0]->type != LDAP_TAG_DelResponse) {
 215                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 216                         return;
 217                 }
 218                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 219                 handle->status = ildb_map_error(ildb, status);
 220                 if (ac->callback && handle->status == LDB_SUCCESS) {
 221                         /* FIXME: build a corresponding ares to pass on */
 222                         handle->status = ac->callback(ac->ildb->module->ldb, ac->context, NULL);
 223                 }
 224                 handle->state = LDB_ASYNC_DONE;
 225                 break;
 226
 227         case LDAP_TAG_ModifyDNRequest:
 228                 if (req->replies[0]->type != LDAP_TAG_ModifyDNResponse) {
 229                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 230                         return;
 231                 }
 232                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 233                 handle->status = ildb_map_error(ildb, status);
 234                 if (ac->callback && handle->status == LDB_SUCCESS) {
 235                         /* FIXME: build a corresponding ares to pass on */
 236                         handle->status = ac->callback(ac->ildb->module->ldb, ac->context, NULL);
 237                 }
 238                 handle->state = LDB_ASYNC_DONE;
 239                 break;
 240
 241         case LDAP_TAG_SearchRequest:
 242                 /* loop over all messages */
 243                 for (i = 0; i < req->num_replies; i++) {
 244                         struct ldap_SearchResEntry *search;
 245                         struct ldb_reply *ares = NULL;
 246                         struct ldap_message *msg;
 247                         int ret;
 248
 249                         ares = talloc_zero(ac, struct ldb_reply);
 250                         if (!ares) {
 251                                 handle->status = LDB_ERR_OPERATIONS_ERROR;
 252                                 return;
 253                         }
 254
 255                         msg = req->replies[i];
 256                         switch (msg->type) {
 257
 258                         case LDAP_TAG_SearchResultDone:
 259
 260                                 status = ldap_check_response(req->conn, &msg->r.GeneralResult);
 261                                 if (!NT_STATUS_IS_OK(status)) {
 262                                         handle->status = ildb_map_error(ildb, status);
 263                                         return;
 264                                 }
 265
 266                                 ares->controls = talloc_move(ares, &msg->controls);
 267                                 if (msg->r.SearchResultDone.resultcode) {
 268                                         if (msg->r.SearchResultDone.errormessage) {
 269                                                 ldb_set_errstring(ac->ildb->module->ldb, msg->r.SearchResultDone.errormessage);
 270                                         }
 271                                 }
 272
 273                                 handle->status = msg->r.SearchResultDone.resultcode;
 274                                 handle->state = LDB_ASYNC_DONE;
 275                                 ares->type = LDB_REPLY_DONE;
 276                                 break;
 277
 278                         case LDAP_TAG_SearchResultEntry:
 279
 280
 281                                 ares->message = ldb_msg_new(ares);
 282                                 if (!ares->message) {
 283                                         handle->status = LDB_ERR_OPERATIONS_ERROR;
 284                                         return;
 285                                 }
 286
 287                                 search = &(msg->r.SearchResultEntry);
 288
 289                                 ares->message->dn = ldb_dn_new(ares->message, ac->ildb->module->ldb, search->dn);
 290                                 if ( ! ldb_dn_validate(ares->message->dn)) {
 291                                         handle->status = LDB_ERR_OPERATIONS_ERROR;
 292                                         return;
 293                                 }
 294                                 ares->message->num_elements = search->num_attributes;
 295                                 ares->message->elements = talloc_move(ares->message,
 296                                                                       &search->attributes);
 297
 298                                 handle->status = LDB_SUCCESS;
 299                                 handle->state = LDB_ASYNC_PENDING;
 300                                 ares->type = LDB_REPLY_ENTRY;
 301                                 break;
 302
 303                         case LDAP_TAG_SearchResultReference:
 304
 305                                 ares->referral = talloc_strdup(ares, msg->r.SearchResultReference.referral);
 306
 307                                 handle->status = LDB_SUCCESS;
 308                                 handle->state = LDB_ASYNC_PENDING;
 309                                 ares->type = LDB_REPLY_REFERRAL;
 310                                 break;
 311
 312                         default:
 313                                 /* TAG not handled, fail ! */
 314                                 handle->status = LDB_ERR_PROTOCOL_ERROR;
 315                                 return;
 316                         }
 317
 318                         ret = ac->callback(ac->ildb->module->ldb, ac->context, ares);
 319                         if (ret) {
 320                                 handle->status = ret;
 321                         }
 322                 }
 323
 324                 talloc_free(req->replies);
 325                 req->replies = NULL;
 326                 req->num_replies = 0;
 327
 328                 break;
 329
 330         default:
 331                 handle->status = LDB_ERR_PROTOCOL_ERROR;
 332                 return;
 333         }
 334 }
 335
 336 static struct ildb_context *init_ildb_handle(struct ildb_private *ildb,
 337                                              struct ldb_request *req)
 338 {
 339         struct ildb_context *ildb_ac;
 340         struct ldb_handle *h;
 341
 342         h = talloc_zero(req, struct ldb_handle);
 343         if (h == NULL) {
 344                 ldb_set_errstring(ildb->module->ldb, "Out of Memory");
 345                 return NULL;
 346         }
 347
 348         h->module = ildb->module;
 349
 350         ildb_ac = talloc(h, struct ildb_context);
 351         if (ildb_ac == NULL) {
 352                 ldb_set_errstring(ildb->module->ldb, "Out of Memory");
 353                 talloc_free(h);
 354                 return NULL;
 355         }
 356
 357         h->private_data = ildb_ac;
 358
 359         h->state = LDB_ASYNC_INIT;
 360         h->status = LDB_SUCCESS;
 361
 362         ildb_ac->ildb = ildb;
 363         ildb_ac->handle = h;
 364         ildb_ac->context = req->context;
 365         ildb_ac->callback = req->callback;
 366
 367         req->handle = h;
 368         return ildb_ac;
 369 }
 370
 371 static int ildb_request_send(struct ildb_private *ildb, struct ldap_message *msg, struct ldb_request *r)
 372 {
 373         struct ildb_context *ildb_ac = init_ildb_handle(ildb, r);
 374         struct ldap_request *req;
 375
 376         if (!ildb_ac) {
 377                 return LDB_ERR_OPERATIONS_ERROR;
 378         }
 379
 380         req = ldap_request_send(ildb->ldap, msg);
 381         if (req == NULL) {
 382                 ldb_set_errstring(ildb->module->ldb, "async send request failed");
 383                 return LDB_ERR_OPERATIONS_ERROR;
 384         }
 385         ildb_ac->req = talloc_steal(ildb_ac, req);
 386
 387         if (!req->conn) {
 388                 ldb_set_errstring(ildb->module->ldb, "connection to remote LDAP server dropped?");
 389                 return LDB_ERR_OPERATIONS_ERROR;
 390         }
 391
 392         talloc_free(req->time_event);
 393         req->time_event = NULL;
 394         if (r->timeout) {
 395                 req->time_event = event_add_timed(req->conn->event.event_ctx, ildb_ac,
 396                                                   timeval_current_ofs(r->timeout, 0),
 397                                                   ildb_request_timeout, ildb_ac);
 398         }
 399
 400         req->async.fn = ildb_callback;
 401         req->async.private_data = ildb_ac;
 402
 403         return LDB_SUCCESS;
 404 }
 405
 406 static int ildb_request_noop(struct ildb_private *ildb, struct ldb_request *req)
 407 {
 408         struct ildb_context *ildb_ac = init_ildb_handle(ildb, req);
 409         int ret = LDB_SUCCESS;
 410
 411         if (!ildb_ac) {
 412                 return LDB_ERR_OPERATIONS_ERROR;
 413         }
 414
 415         if (ildb_ac->callback) {
 416                 ret = ildb_ac->callback(ildb->module->ldb, ildb_ac->context, NULL);
 417         }
 418         ildb_ac->handle->state = LDB_ASYNC_DONE;
 419         return ret;
 420 }
 421
 422 /*
 423   search for matching records using an asynchronous function
 424  */
 425 static int ildb_search(struct ldb_module *module, struct ldb_request *req)
 426 {
 427         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 428         struct ldap_message *msg;
 429         int n;
 430
 431         req->handle = NULL;
 432
 433         if (!req->callback || !req->context) {
 434                 ldb_set_errstring(module->ldb, "Async interface called with NULL callback function or NULL context");
 435                 return LDB_ERR_OPERATIONS_ERROR;
 436         }
 437
 438         if (req->op.search.tree == NULL) {
 439                 ldb_set_errstring(module->ldb, "Invalid expression parse tree");
 440                 return LDB_ERR_OPERATIONS_ERROR;
 441         }
 442
 443         msg = new_ldap_message(req);
 444         if (msg == NULL) {
 445                 ldb_set_errstring(module->ldb, "Out of Memory");
 446                 return LDB_ERR_OPERATIONS_ERROR;
 447         }
 448
 449         msg->type = LDAP_TAG_SearchRequest;
 450
 451         if (req->op.search.base == NULL) {
 452                 msg->r.SearchRequest.basedn = talloc_strdup(msg, "");
 453         } else {
 454                 msg->r.SearchRequest.basedn  = ldb_dn_alloc_linearized(msg, req->op.search.base);
 455         }
 456         if (msg->r.SearchRequest.basedn == NULL) {
 457                 ldb_set_errstring(module->ldb, "Unable to determine baseDN");
 458                 talloc_free(msg);
 459                 return LDB_ERR_OPERATIONS_ERROR;
 460         }
 461
 462         if (req->op.search.scope == LDB_SCOPE_DEFAULT) {
 463                 msg->r.SearchRequest.scope = LDB_SCOPE_SUBTREE;
 464         } else {
 465                 msg->r.SearchRequest.scope = req->op.search.scope;
 466         }
 467
 468         msg->r.SearchRequest.deref  = LDAP_DEREFERENCE_NEVER;
 469         msg->r.SearchRequest.timelimit = 0;
 470         msg->r.SearchRequest.sizelimit = 0;
 471         msg->r.SearchRequest.attributesonly = 0;
 472         msg->r.SearchRequest.tree = discard_const(req->op.search.tree);
 473
 474         for (n = 0; req->op.search.attrs && req->op.search.attrs[n]; n++) /* noop */ ;
 475         msg->r.SearchRequest.num_attributes = n;
 476         msg->r.SearchRequest.attributes = discard_const(req->op.search.attrs);
 477         msg->controls = req->controls;
 478
 479         return ildb_request_send(ildb, msg, req);
 480 }
 481
 482 /*
 483   add a record
 484 */
 485 static int ildb_add(struct ldb_module *module, struct ldb_request *req)
 486 {
 487         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 488         struct ldap_message *msg;
 489         struct ldap_mod **mods;
 490         int i,n;
 491
 492         req->handle = NULL;
 493
 494         /* ignore ltdb specials */
 495         if (ldb_dn_is_special(req->op.add.message->dn)) {
 496                 return ildb_request_noop(ildb, req);
 497         }
 498
 499         msg = new_ldap_message(req);
 500         if (msg == NULL) {
 501                 return LDB_ERR_OPERATIONS_ERROR;
 502         }
 503
 504         msg->type = LDAP_TAG_AddRequest;
 505
 506         msg->r.AddRequest.dn = ldb_dn_alloc_linearized(msg, req->op.add.message->dn);
 507         if (msg->r.AddRequest.dn == NULL) {
 508                 talloc_free(msg);
 509                 return LDB_ERR_INVALID_DN_SYNTAX;
 510         }
 511
 512         mods = ildb_msg_to_mods(msg, &n, req->op.add.message, 0);
 513         if (mods == NULL) {
 514                 talloc_free(msg);
 515                 return LDB_ERR_OPERATIONS_ERROR;
 516         }
 517
 518         msg->r.AddRequest.num_attributes = n;
 519         msg->r.AddRequest.attributes = talloc_array(msg, struct ldb_message_element, n);
 520         if (msg->r.AddRequest.attributes == NULL) {
 521                 talloc_free(msg);
 522                 return LDB_ERR_OPERATIONS_ERROR;
 523         }
 524
 525         for (i = 0; i < n; i++) {
 526                 msg->r.AddRequest.attributes[i] = mods[i]->attrib;
 527         }
 528
 529         return ildb_request_send(ildb, msg, req);
 530 }
 531
 532 /*
 533   modify a record
 534 */
 535 static int ildb_modify(struct ldb_module *module, struct ldb_request *req)
 536 {
 537         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 538         struct ldap_message *msg;
 539         struct ldap_mod **mods;
 540         int i,n;
 541
 542         req->handle = NULL;
 543
 544         /* ignore ltdb specials */
 545         if (ldb_dn_is_special(req->op.mod.message->dn)) {
 546                 return ildb_request_noop(ildb, req);
 547         }
 548
 549         msg = new_ldap_message(req);
 550         if (msg == NULL) {
 551                 return LDB_ERR_OPERATIONS_ERROR;
 552         }
 553
 554         msg->type = LDAP_TAG_ModifyRequest;
 555
 556         msg->r.ModifyRequest.dn = ldb_dn_alloc_linearized(msg, req->op.mod.message->dn);
 557         if (msg->r.ModifyRequest.dn == NULL) {
 558                 talloc_free(msg);
 559                 return LDB_ERR_INVALID_DN_SYNTAX;
 560         }
 561
 562         mods = ildb_msg_to_mods(msg, &n, req->op.mod.message, 1);
 563         if (mods == NULL) {
 564                 talloc_free(msg);
 565                 return LDB_ERR_OPERATIONS_ERROR;
 566         }
 567
 568         msg->r.ModifyRequest.num_mods = n;
 569         msg->r.ModifyRequest.mods = talloc_array(msg, struct ldap_mod, n);
 570         if (msg->r.ModifyRequest.mods == NULL) {
 571                 talloc_free(msg);
 572                 return LDB_ERR_OPERATIONS_ERROR;
 573         }
 574
 575         for (i = 0; i < n; i++) {
 576                 msg->r.ModifyRequest.mods[i] = *mods[i];
 577         }
 578
 579         return ildb_request_send(ildb, msg, req);
 580 }
 581
 582 /*
 583   delete a record
 584 */
 585 static int ildb_delete(struct ldb_module *module, struct ldb_request *req)
 586 {
 587         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 588         struct ldap_message *msg;
 589
 590         req->handle = NULL;
 591
 592         /* ignore ltdb specials */
 593         if (ldb_dn_is_special(req->op.del.dn)) {
 594                 return ildb_request_noop(ildb, req);
 595         }
 596
 597         msg = new_ldap_message(req);
 598         if (msg == NULL) {
 599                 return LDB_ERR_OPERATIONS_ERROR;
 600         }
 601
 602         msg->type = LDAP_TAG_DelRequest;
 603
 604         msg->r.DelRequest.dn = ldb_dn_alloc_linearized(msg, req->op.del.dn);
 605         if (msg->r.DelRequest.dn == NULL) {
 606                 talloc_free(msg);
 607                 return LDB_ERR_INVALID_DN_SYNTAX;
 608         }
 609
 610         return ildb_request_send(ildb, msg, req);
 611 }
 612
 613 /*
 614   rename a record
 615 */
 616 static int ildb_rename(struct ldb_module *module, struct ldb_request *req)
 617 {
 618         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 619         struct ldap_message *msg;
 620
 621         req->handle = NULL;
 622
 623         /* ignore ltdb specials */
 624         if (ldb_dn_is_special(req->op.rename.olddn) || ldb_dn_is_special(req->op.rename.newdn)) {
 625                 return ildb_request_noop(ildb, req);
 626         }
 627
 628         msg = new_ldap_message(req);
 629         if (msg == NULL) {
 630                 return LDB_ERR_OPERATIONS_ERROR;
 631         }
 632
 633         msg->type = LDAP_TAG_ModifyDNRequest;
 634         msg->r.ModifyDNRequest.dn = ldb_dn_alloc_linearized(msg, req->op.rename.olddn);
 635         if (msg->r.ModifyDNRequest.dn == NULL) {
 636                 talloc_free(msg);
 637                 return LDB_ERR_INVALID_DN_SYNTAX;
 638         }
 639
 640         msg->r.ModifyDNRequest.newrdn =
 641                 talloc_asprintf(msg, "%s=%s",
 642                                 ldb_dn_get_rdn_name(req->op.rename.newdn),
 643                                 ldb_dn_escape_value(msg, *ldb_dn_get_rdn_val(req->op.rename.newdn)));
 644         if (msg->r.ModifyDNRequest.newrdn == NULL) {
 645                 talloc_free(msg);
 646                 return LDB_ERR_OPERATIONS_ERROR;
 647         }
 648
 649         msg->r.ModifyDNRequest.newsuperior =
 650                 ldb_dn_alloc_linearized(msg, ldb_dn_get_parent(msg, req->op.rename.newdn));
 651         if (msg->r.ModifyDNRequest.newsuperior == NULL) {
 652                 talloc_free(msg);
 653                 return LDB_ERR_INVALID_DN_SYNTAX;
 654         }
 655
 656         msg->r.ModifyDNRequest.deleteolddn = true;
 657
 658         return ildb_request_send(ildb, msg, req);
 659 }
 660
 661 static int ildb_start_trans(struct ldb_module *module)
 662 {
 663         /* TODO implement a local locking mechanism here */
 664
 665         return LDB_SUCCESS;
 666 }
 667
 668 static int ildb_end_trans(struct ldb_module *module)
 669 {
 670         /* TODO implement a local transaction mechanism here */
 671
 672         return LDB_SUCCESS;
 673 }
 674
 675 static int ildb_del_trans(struct ldb_module *module)
 676 {
 677         /* TODO implement a local locking mechanism here */
 678
 679         return LDB_SUCCESS;
 680 }
 681
 682 static int ildb_request(struct ldb_module *module, struct ldb_request *req)
 683 {
 684         return LDB_ERR_OPERATIONS_ERROR;
 685 }
 686
 687 static int ildb_wait(struct ldb_handle *handle, enum ldb_wait_type type)
 688 {
 689         struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
 690
 691         if (handle->state == LDB_ASYNC_DONE) {
 692                 return handle->status;
 693         }
 694
 695         if (!ac) {
 696                 return LDB_ERR_OPERATIONS_ERROR;
 697         }
 698
 699         handle->state = LDB_ASYNC_INIT;
 700
 701         switch(type) {
 702         case LDB_WAIT_NONE:
 703                 if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
 704                         return LDB_ERR_OTHER;
 705                 }
 706                 break;
 707         case LDB_WAIT_ALL:
 708                 while (handle->status == LDB_SUCCESS && handle->state != LDB_ASYNC_DONE) {
 709                         if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
 710                                 return LDB_ERR_OTHER;
 711                         }
 712                 }
 713                 break;
 714         default:
 715                 return LDB_ERR_OPERATIONS_ERROR;
 716         }
 717
 718         return handle->status;
 719 }
 720
 721 static const struct ldb_module_ops ildb_ops = {
 722         .name              = "ldap",
 723         .search            = ildb_search,
 724         .add               = ildb_add,
 725         .modify            = ildb_modify,
 726         .del               = ildb_delete,
 727         .rename            = ildb_rename,
 728         .request           = ildb_request,
 729         .start_transaction = ildb_start_trans,
 730         .end_transaction   = ildb_end_trans,
 731         .del_transaction   = ildb_del_trans,
 732         .wait              = ildb_wait
 733 };
 734
 735 /*
 736   connect to the database
 737 */
 738 static int ildb_connect(struct ldb_context *ldb, const char *url,
 739                         unsigned int flags, const char *options[],
 740                         struct ldb_module **_module)
 741 {
 742         struct ldb_module *module;
 743         struct ildb_private *ildb;
 744         NTSTATUS status;
 745         struct cli_credentials *creds;
 746         struct event_context *event_ctx;
 747
 748         module = talloc(ldb, struct ldb_module);
 749         if (!module) {
 750                 ldb_oom(ldb);
 751                 return -1;
 752         }
 753         talloc_set_name_const(module, "ldb_ildap backend");
 754         module->ldb             = ldb;
 755         module->prev            = module->next = NULL;
 756         module->private_data    = NULL;
 757         module->ops             = &ildb_ops;
 758
 759         ildb = talloc(module, struct ildb_private);
 760         if (!ildb) {
 761                 ldb_oom(ldb);
 762                 goto failed;
 763         }
 764         module->private_data    = ildb;
 765         ildb->module            = module;
 766
 767         event_ctx = ldb_get_event_context(ldb);
 768
 769         ildb->ldap = ldap4_new_connection(ildb, ldb_get_opaque(ldb, "loadparm"),
 770                                           event_ctx);
 771         if (!ildb->ldap) {
 772                 ldb_oom(ldb);
 773                 goto failed;
 774         }
 775
 776         if (flags & LDB_FLG_RECONNECT) {
 777                 ldap_set_reconn_params(ildb->ldap, 10);
 778         }
 779
 780         status = ldap_connect(ildb->ldap, url);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to connect to ldap URL '%s' - %s\n",
 783                           url, ldap_errstr(ildb->ldap, module, status));
 784                 goto failed;
 785         }
 786
 787         /* caller can optionally setup credentials using the opaque token 'credentials' */
 788         creds = talloc_get_type(ldb_get_opaque(ldb, "credentials"), struct cli_credentials);
 789         if (creds == NULL) {
 790                 struct auth_session_info *session_info = talloc_get_type(ldb_get_opaque(ldb, "sessionInfo"), struct auth_session_info);
 791                 if (session_info) {
 792                         creds = session_info->credentials;
 793                 }
 794         }
 795
 796         if (creds != NULL && cli_credentials_authentication_requested(creds)) {
 797                 const char *bind_dn = cli_credentials_get_bind_dn(creds);
 798                 if (bind_dn) {
 799                         const char *password = cli_credentials_get_password(creds);
 800                         status = ldap_bind_simple(ildb->ldap, bind_dn, password);
 801                         if (!NT_STATUS_IS_OK(status)) {
 802                                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s\n",
 803                                           ldap_errstr(ildb->ldap, module, status));
 804                                 goto failed;
 805                         }
 806                 } else {
 807                         status = ldap_bind_sasl(ildb->ldap, creds, ldb_get_opaque(ldb, "loadparm"));
 808                         if (!NT_STATUS_IS_OK(status)) {
 809                                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s\n",
 810                                           ldap_errstr(ildb->ldap, module, status));
 811                                 goto failed;
 812                         }
 813                 }
 814         }
 815
 816         *_module = module;
 817         return 0;
 818
 819 failed:
 820         talloc_free(module);
 821         return -1;
 822 }
 823
 824 _PUBLIC_ const struct ldb_backend_ops ldb_ldap_backend_ops = {
 825         .name = "ldap",
 826         .connect_fn = ildb_connect
 827 };
 828
 829 _PUBLIC_ const struct ldb_backend_ops ldb_ldapi_backend_ops = {
 830         .name = "ldapi",
 831         .connect_fn = ildb_connect
 832 };
 833
 834 _PUBLIC_ const struct ldb_backend_ops ldb_ldaps_backend_ops = {
 835         .name = "ldaps",
 836         .connect_fn = ildb_connect
 837 };
 838