source/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       2006
   6
   7      ** NOTE! The following LGPL license applies to the ldb
   8      ** library. This does NOT imply that all of Samba is released
   9      ** under the LGPL
  10
  11    This library is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU Lesser General Public
  13    License as published by the Free Software Foundation; either
  14    version 2 of the License, or (at your option) any later version.
  15
  16    This library is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License for more details.
  20
  21    You should have received a copy of the GNU Lesser General Public
  22    License along with this library; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24 */
  25
  26 /*
  27  *  Name: ldb_ildap
  28  *
  29  *  Component: ldb ildap backend
  30  *
  31  *  Description: This is a ldb backend for the internal ldap
  32  *  client library in Samba4. By using this backend we are
  33  *  independent of a system ldap library
  34  *
  35  *  Author: Andrew Tridgell
  36  *
  37  *  Modifications:
  38  *
  39  *  - description: make the module use asyncronous calls
  40  *    date: Feb 2006
  41  *    author: Simo Sorce
  42  */
  43
  44
  45 #include "includes.h"
  46 #include "ldb/include/includes.h"
  47
  48 #include "lib/events/events.h"
  49 #include "libcli/ldap/ldap.h"
  50 #include "libcli/ldap/ldap_client.h"
  51 #include "auth/auth.h"
  52 #include "auth/credentials/credentials.h"
  53
  54 struct ildb_private {
  55         struct ldap_connection *ldap;
  56         struct ldb_context *ldb;
  57 };
  58
  59 struct ildb_context {
  60         struct ldb_module *module;
  61         struct ldap_request *req;
  62         void *context;
  63         int (*callback)(struct ldb_context *, void *, struct ldb_reply *);
  64 };
  65
  66 /*
  67   convert a ldb_message structure to a list of ldap_mod structures
  68   ready for ildap_add() or ildap_modify()
  69 */
  70 static struct ldap_mod **ildb_msg_to_mods(void *mem_ctx, int *num_mods,
  71                                           const struct ldb_message *msg, int use_flags)
  72 {
  73         struct ldap_mod **mods;
  74         unsigned int i;
  75         int n = 0;
  76
  77         /* allocate maximum number of elements needed */
  78         mods = talloc_array(mem_ctx, struct ldap_mod *, msg->num_elements+1);
  79         if (!mods) {
  80                 errno = ENOMEM;
  81                 return NULL;
  82         }
  83         mods[0] = NULL;
  84
  85         for (i = 0; i < msg->num_elements; i++) {
  86                 const struct ldb_message_element *el = &msg->elements[i];
  87
  88                 mods[n] = talloc(mods, struct ldap_mod);
  89                 if (!mods[n]) {
  90                         goto failed;
  91                 }
  92                 mods[n + 1] = NULL;
  93                 mods[n]->type = 0;
  94                 mods[n]->attrib = *el;
  95                 if (use_flags) {
  96                         switch (el->flags & LDB_FLAG_MOD_MASK) {
  97                         case LDB_FLAG_MOD_ADD:
  98                                 mods[n]->type = LDAP_MODIFY_ADD;
  99                                 break;
 100                         case LDB_FLAG_MOD_DELETE:
 101                                 mods[n]->type = LDAP_MODIFY_DELETE;
 102                                 break;
 103                         case LDB_FLAG_MOD_REPLACE:
 104                                 mods[n]->type = LDAP_MODIFY_REPLACE;
 105                                 break;
 106                         }
 107                 }
 108                 n++;
 109         }
 110
 111         *num_mods = n;
 112         return mods;
 113
 114 failed:
 115         talloc_free(mods);
 116         return NULL;
 117 }
 118
 119
 120 /*
 121   map an ildap NTSTATUS to a ldb error code
 122 */
 123 static int ildb_map_error(struct ildb_private *ildb, NTSTATUS status)
 124 {
 125         if (NT_STATUS_IS_OK(status)) {
 126                 return LDB_SUCCESS;
 127         }
 128         ldb_set_errstring(ildb->ldb, ldap_errstr(ildb->ldap, status));
 129         if (NT_STATUS_IS_LDAP(status)) {
 130                 return NT_STATUS_LDAP_CODE(status);
 131         }
 132         return LDB_ERR_OPERATIONS_ERROR;
 133 }
 134
 135 static void ildb_request_timeout(struct event_context *ev, struct timed_event *te,
 136                                  struct timeval t, void *private_data)
 137 {
 138         struct ldb_handle *handle = talloc_get_type(private_data, struct ldb_handle);
 139         struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
 140
 141         if (ac->req->state == LDAP_REQUEST_PENDING) {
 142                 DLIST_REMOVE(ac->req->conn->pending, ac->req);
 143         }
 144
 145         handle->status = LDB_ERR_TIME_LIMIT_EXCEEDED;
 146
 147         return;
 148 }
 149
 150 static void ildb_callback(struct ldap_request *req)
 151 {
 152         struct ldb_handle *handle = talloc_get_type(req->async.private_data, struct ldb_handle);
 153         struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
 154         struct ildb_private *ildb = talloc_get_type(ac->module->private_data, struct ildb_private);
 155         NTSTATUS status;
 156         int i;
 157
 158         handle->status = LDB_SUCCESS;
 159
 160         if (!NT_STATUS_IS_OK(req->status)) {
 161                 handle->status = ildb_map_error(ildb, req->status);
 162                 return;
 163         }
 164
 165         if (req->num_replies < 1) {
 166                 handle->status = LDB_ERR_OPERATIONS_ERROR;
 167                 return;
 168         }
 169
 170         switch (req->type) {
 171
 172         case LDAP_TAG_ModifyRequest:
 173                 if (req->replies[0]->type != LDAP_TAG_ModifyResponse) {
 174                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 175                         return;
 176                 }
 177                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 178                 handle->status = ildb_map_error(ildb, status);
 179                 if (ac->callback && handle->status == LDB_SUCCESS) {
 180                         /* FIXME: build a corresponding ares to pass on */
 181                         handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
 182                 }
 183                 handle->state = LDB_ASYNC_DONE;
 184                 break;
 185
 186         case LDAP_TAG_AddRequest:
 187                 if (req->replies[0]->type != LDAP_TAG_AddResponse) {
 188                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 189                         return;
 190                 }
 191                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 192                 handle->status = ildb_map_error(ildb, status);
 193                 if (ac->callback && handle->status == LDB_SUCCESS) {
 194                         /* FIXME: build a corresponding ares to pass on */
 195                         handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
 196                 }
 197                 handle->state = LDB_ASYNC_DONE;
 198                 break;
 199
 200         case LDAP_TAG_DelRequest:
 201                 if (req->replies[0]->type != LDAP_TAG_DelResponse) {
 202                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 203                         return;
 204                 }
 205                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 206                 handle->status = ildb_map_error(ildb, status);
 207                 if (ac->callback && handle->status == LDB_SUCCESS) {
 208                         /* FIXME: build a corresponding ares to pass on */
 209                         handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
 210                 }
 211                 handle->state = LDB_ASYNC_DONE;
 212                 break;
 213
 214         case LDAP_TAG_ModifyDNRequest:
 215                 if (req->replies[0]->type != LDAP_TAG_ModifyDNResponse) {
 216                         handle->status = LDB_ERR_PROTOCOL_ERROR;
 217                         return;
 218                 }
 219                 status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
 220                 handle->status = ildb_map_error(ildb, status);
 221                 if (ac->callback && handle->status == LDB_SUCCESS) {
 222                         /* FIXME: build a corresponding ares to pass on */
 223                         handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
 224                 }
 225                 handle->state = LDB_ASYNC_DONE;
 226                 break;
 227
 228         case LDAP_TAG_SearchRequest:
 229                 /* loop over all messages */
 230                 for (i = 0; i < req->num_replies; i++) {
 231                         struct ldap_SearchResEntry *search;
 232                         struct ldb_reply *ares = NULL;
 233                         struct ldap_message *msg;
 234                         int ret;
 235
 236                         ares = talloc_zero(ac, struct ldb_reply);
 237                         if (!ares) {
 238                                 handle->status = LDB_ERR_OPERATIONS_ERROR;
 239                                 return;
 240                         }
 241
 242                         msg = req->replies[i];
 243                         switch (msg->type) {
 244
 245                         case LDAP_TAG_SearchResultDone:
 246
 247                                 status = ldap_check_response(req->conn, &msg->r.GeneralResult);
 248                                 if (!NT_STATUS_IS_OK(status)) {
 249                                         handle->status = ildb_map_error(ildb, status);
 250                                         return;
 251                                 }
 252
 253                                 ares->controls = talloc_move(ares, &msg->controls);
 254                                 if (msg->r.SearchResultDone.resultcode) {
 255                                         if (msg->r.SearchResultDone.errormessage) {
 256                                                 ldb_set_errstring(ac->module->ldb, msg->r.SearchResultDone.errormessage);
 257                                         }
 258                                 }
 259
 260                                 handle->status = msg->r.SearchResultDone.resultcode;
 261                                 handle->state = LDB_ASYNC_DONE;
 262                                 ares->type = LDB_REPLY_DONE;
 263                                 break;
 264
 265                         case LDAP_TAG_SearchResultEntry:
 266
 267
 268                                 ares->message = ldb_msg_new(ares);
 269                                 if (!ares->message) {
 270                                         handle->status = LDB_ERR_OPERATIONS_ERROR;
 271                                         return;
 272                                 }
 273
 274                                 search = &(msg->r.SearchResultEntry);
 275
 276                                 ares->message->dn = ldb_dn_explode_or_special(ares->message, search->dn);
 277                                 if (ares->message->dn == NULL) {
 278                                         handle->status = LDB_ERR_OPERATIONS_ERROR;
 279                                         return;
 280                                 }
 281                                 ares->message->num_elements = search->num_attributes;
 282                                 ares->message->elements = talloc_move(ares->message,
 283                                                                       &search->attributes);
 284
 285                                 handle->status = LDB_SUCCESS;
 286                                 handle->state = LDB_ASYNC_PENDING;
 287                                 ares->type = LDB_REPLY_ENTRY;
 288                                 break;
 289
 290                         case LDAP_TAG_SearchResultReference:
 291
 292                                 ares->referral = talloc_strdup(ares, msg->r.SearchResultReference.referral);
 293
 294                                 handle->status = LDB_SUCCESS;
 295                                 handle->state = LDB_ASYNC_PENDING;
 296                                 ares->type = LDB_REPLY_REFERRAL;
 297                                 break;
 298
 299                         default:
 300                                 /* TAG not handled, fail ! */
 301                                 handle->status = LDB_ERR_PROTOCOL_ERROR;
 302                                 return;
 303                         }
 304
 305                         ret = ac->callback(ac->module->ldb, ac->context, ares);
 306                         if (ret) {
 307                                 handle->status = ret;
 308                         }
 309                 }
 310
 311                 talloc_free(req->replies);
 312                 req->replies = NULL;
 313                 req->num_replies = 0;
 314
 315                 break;
 316
 317         default:
 318                 handle->status = LDB_ERR_PROTOCOL_ERROR;
 319                 return;
 320         }
 321 }
 322
 323 static struct ldb_handle *init_ildb_handle(struct ldb_module *module,
 324                                            void *context,
 325                                            int (*callback)(struct ldb_context *, void *, struct ldb_reply *))
 326 {
 327         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 328         struct ildb_context *ildb_ac;
 329         struct ldb_handle *h;
 330
 331         h = talloc_zero(ildb->ldap, struct ldb_handle);
 332         if (h == NULL) {
 333                 ldb_set_errstring(module->ldb, "Out of Memory");
 334                 return NULL;
 335         }
 336
 337         h->module = module;
 338
 339         ildb_ac = talloc(h, struct ildb_context);
 340         if (ildb_ac == NULL) {
 341                 ldb_set_errstring(module->ldb, "Out of Memory");
 342                 talloc_free(h);
 343                 return NULL;
 344         }
 345
 346         h->private_data = (void *)ildb_ac;
 347
 348         h->state = LDB_ASYNC_INIT;
 349         h->status = LDB_SUCCESS;
 350
 351         ildb_ac->module = module;
 352         ildb_ac->context = context;
 353         ildb_ac->callback = callback;
 354
 355         return h;
 356 }
 357
 358 static int ildb_request_send(struct ldb_module *module, struct ldap_message *msg,
 359                              void *context,
 360                              int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
 361                              int timeout,
 362                              struct ldb_handle **handle)
 363 {
 364         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 365         struct ldb_handle *h = init_ildb_handle(module, context, callback);
 366         struct ildb_context *ildb_ac;
 367         struct ldap_request *req;
 368
 369         if (!h) {
 370                 return LDB_ERR_OPERATIONS_ERROR;
 371         }
 372
 373         ildb_ac = talloc_get_type(h->private_data, struct ildb_context);
 374
 375         req = ldap_request_send(ildb->ldap, msg);
 376         if (req == NULL) {
 377                 ldb_set_errstring(module->ldb, "async send request failed");
 378                 return LDB_ERR_OPERATIONS_ERROR;
 379         }
 380
 381         if (!req->conn) {
 382                 ldb_set_errstring(module->ldb, "connection to remote LDAP server dropped?");
 383                 return LDB_ERR_OPERATIONS_ERROR;
 384         }
 385
 386         talloc_free(req->time_event);
 387         req->time_event = NULL;
 388         if (timeout) {
 389                 req->time_event = event_add_timed(req->conn->event.event_ctx, h,
 390                                                   timeval_current_ofs(timeout, 0),
 391                                                   ildb_request_timeout, h);
 392         }
 393
 394         req->async.fn = ildb_callback;
 395         req->async.private_data = (void *)h;
 396         ildb_ac->req = talloc_move(ildb_ac, &req);
 397
 398         *handle = h;
 399         return LDB_SUCCESS;
 400 }
 401
 402 static int ildb_request_noop(struct ldb_module *module, struct ldb_request *req)
 403 {
 404         struct ldb_handle *h = init_ildb_handle(module, req->context, req->callback);
 405         struct ildb_context *ildb_ac;
 406         int ret = LDB_SUCCESS;
 407
 408         if (!h) {
 409                 return LDB_ERR_OPERATIONS_ERROR;
 410         }
 411
 412         ildb_ac = talloc_get_type(h->private_data, struct ildb_context);
 413
 414         req->handle = h;
 415
 416         if (ildb_ac->callback) {
 417                 ret = ildb_ac->callback(module->ldb, ildb_ac->context, NULL);
 418         }
 419         req->handle->state = LDB_ASYNC_DONE;
 420         return ret;
 421 }
 422
 423 /*
 424   search for matching records using an asynchronous function
 425  */
 426 static int ildb_search(struct ldb_module *module, struct ldb_request *req)
 427 {
 428         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 429         struct ldap_message *msg;
 430         int n;
 431
 432         req->handle = NULL;
 433
 434         if (!req->callback || !req->context) {
 435                 ldb_set_errstring(module->ldb, "Async interface called with NULL callback function or NULL context");
 436                 return LDB_ERR_OPERATIONS_ERROR;
 437         }
 438
 439         if (req->op.search.tree == NULL) {
 440                 ldb_set_errstring(module->ldb, "Invalid expression parse tree");
 441                 return LDB_ERR_OPERATIONS_ERROR;
 442         }
 443
 444         msg = new_ldap_message(ildb);
 445         if (msg == NULL) {
 446                 ldb_set_errstring(module->ldb, "Out of Memory");
 447                 return LDB_ERR_OPERATIONS_ERROR;
 448         }
 449
 450         msg->type = LDAP_TAG_SearchRequest;
 451
 452         if (req->op.search.base == NULL) {
 453                 msg->r.SearchRequest.basedn = talloc_strdup(msg, "");
 454         } else {
 455                 msg->r.SearchRequest.basedn  = ldb_dn_linearize(msg, req->op.search.base);
 456         }
 457         if (msg->r.SearchRequest.basedn == NULL) {
 458                 ldb_set_errstring(module->ldb, "Unable to determine baseDN");
 459                 talloc_free(msg);
 460                 return LDB_ERR_OPERATIONS_ERROR;
 461         }
 462
 463         if (req->op.search.scope == LDB_SCOPE_DEFAULT) {
 464                 msg->r.SearchRequest.scope = LDB_SCOPE_SUBTREE;
 465         } else {
 466                 msg->r.SearchRequest.scope = req->op.search.scope;
 467         }
 468
 469         msg->r.SearchRequest.deref  = LDAP_DEREFERENCE_NEVER;
 470         msg->r.SearchRequest.timelimit = 0;
 471         msg->r.SearchRequest.sizelimit = 0;
 472         msg->r.SearchRequest.attributesonly = 0;
 473         msg->r.SearchRequest.tree = discard_const_p(struct ldb_parse_tree, req->op.search.tree);
 474
 475         for (n = 0; req->op.search.attrs && req->op.search.attrs[n]; n++) /* noop */ ;
 476         msg->r.SearchRequest.num_attributes = n;
 477         msg->r.SearchRequest.attributes = discard_const_p(char *, req->op.search.attrs),
 478
 479         msg->controls = req->controls;
 480
 481         return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
 482 }
 483
 484 /*
 485   add a record
 486 */
 487 static int ildb_add(struct ldb_module *module, struct ldb_request *req)
 488 {
 489         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 490         struct ldap_message *msg;
 491         struct ldap_mod **mods;
 492         int i,n;
 493
 494         req->handle = NULL;
 495
 496         /* ignore ltdb specials */
 497         if (ldb_dn_is_special(req->op.add.message->dn)) {
 498                 return ildb_request_noop(module, req);
 499         }
 500
 501         msg = new_ldap_message(ildb->ldap);
 502         if (msg == NULL) {
 503                 return LDB_ERR_OPERATIONS_ERROR;
 504         }
 505
 506         msg->type = LDAP_TAG_AddRequest;
 507
 508         msg->r.AddRequest.dn = ldb_dn_linearize(msg, req->op.add.message->dn);
 509         if (msg->r.AddRequest.dn == NULL) {
 510                 talloc_free(msg);
 511                 return LDB_ERR_INVALID_DN_SYNTAX;
 512         }
 513
 514         mods = ildb_msg_to_mods(msg, &n, req->op.add.message, 0);
 515         if (mods == NULL) {
 516                 talloc_free(msg);
 517                 return LDB_ERR_OPERATIONS_ERROR;
 518         }
 519
 520         msg->r.AddRequest.num_attributes = n;
 521         msg->r.AddRequest.attributes = talloc_array(msg, struct ldb_message_element, n);
 522         if (msg->r.AddRequest.attributes == NULL) {
 523                 talloc_free(msg);
 524                 return LDB_ERR_OPERATIONS_ERROR;
 525         }
 526
 527         for (i = 0; i < n; i++) {
 528                 msg->r.AddRequest.attributes[i] = mods[i]->attrib;
 529         }
 530
 531         return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
 532 }
 533
 534 /*
 535   modify a record
 536 */
 537 static int ildb_modify(struct ldb_module *module, struct ldb_request *req)
 538 {
 539         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 540         struct ldap_message *msg;
 541         struct ldap_mod **mods;
 542         int i,n;
 543
 544         req->handle = NULL;
 545
 546         /* ignore ltdb specials */
 547         if (ldb_dn_is_special(req->op.mod.message->dn)) {
 548                 return ildb_request_noop(module, req);
 549         }
 550
 551         msg = new_ldap_message(ildb->ldap);
 552         if (msg == NULL) {
 553                 return LDB_ERR_OPERATIONS_ERROR;
 554         }
 555
 556         msg->type = LDAP_TAG_ModifyRequest;
 557
 558         msg->r.ModifyRequest.dn = ldb_dn_linearize(msg, req->op.mod.message->dn);
 559         if (msg->r.ModifyRequest.dn == NULL) {
 560                 talloc_free(msg);
 561                 return LDB_ERR_INVALID_DN_SYNTAX;
 562         }
 563
 564         mods = ildb_msg_to_mods(msg, &n, req->op.mod.message, 1);
 565         if (mods == NULL) {
 566                 talloc_free(msg);
 567                 return LDB_ERR_OPERATIONS_ERROR;
 568         }
 569
 570         msg->r.ModifyRequest.num_mods = n;
 571         msg->r.ModifyRequest.mods = talloc_array(msg, struct ldap_mod, n);
 572         if (msg->r.ModifyRequest.mods == NULL) {
 573                 talloc_free(msg);
 574                 return LDB_ERR_OPERATIONS_ERROR;
 575         }
 576
 577         for (i = 0; i < n; i++) {
 578                 msg->r.ModifyRequest.mods[i] = *mods[i];
 579         }
 580
 581         return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
 582 }
 583
 584 /*
 585   delete a record
 586 */
 587 static int ildb_delete(struct ldb_module *module, struct ldb_request *req)
 588 {
 589         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 590         struct ldap_message *msg;
 591
 592         req->handle = NULL;
 593
 594         /* ignore ltdb specials */
 595         if (ldb_dn_is_special(req->op.del.dn)) {
 596                 return ildb_request_noop(module, req);
 597         }
 598
 599         msg = new_ldap_message(ildb->ldap);
 600         if (msg == NULL) {
 601                 return LDB_ERR_OPERATIONS_ERROR;
 602         }
 603
 604         msg->type = LDAP_TAG_DelRequest;
 605
 606         msg->r.DelRequest.dn = ldb_dn_linearize(msg, req->op.del.dn);
 607         if (msg->r.DelRequest.dn == NULL) {
 608                 talloc_free(msg);
 609                 return LDB_ERR_INVALID_DN_SYNTAX;
 610         }
 611
 612         return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
 613 }
 614
 615 /*
 616   rename a record
 617 */
 618 static int ildb_rename(struct ldb_module *module, struct ldb_request *req)
 619 {
 620         struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
 621         struct ldap_message *msg;
 622
 623         req->handle = NULL;
 624
 625         /* ignore ltdb specials */
 626         if (ldb_dn_is_special(req->op.rename.olddn) || ldb_dn_is_special(req->op.rename.newdn)) {
 627                 return ildb_request_noop(module, req);
 628         }
 629
 630         msg = new_ldap_message(ildb->ldap);
 631         if (msg == NULL) {
 632                 return LDB_ERR_OPERATIONS_ERROR;
 633         }
 634
 635         msg->type = LDAP_TAG_ModifyDNRequest;
 636         msg->r.ModifyDNRequest.dn = ldb_dn_linearize(msg, req->op.rename.olddn);
 637         if (msg->r.ModifyDNRequest.dn == NULL) {
 638                 talloc_free(msg);
 639                 return LDB_ERR_INVALID_DN_SYNTAX;
 640         }
 641
 642         msg->r.ModifyDNRequest.newrdn =
 643                 talloc_asprintf(msg, "%s=%s",
 644                                 ldb_dn_get_rdn_name(req->op.rename.newdn),
 645                                 ldb_dn_escape_value(msg, *ldb_dn_get_rdn_val(req->op.rename.newdn)));
 646         if (msg->r.ModifyDNRequest.newrdn == NULL) {
 647                 talloc_free(msg);
 648                 return LDB_ERR_OPERATIONS_ERROR;
 649         }
 650
 651         msg->r.ModifyDNRequest.newsuperior =
 652                 ldb_dn_linearize(msg,
 653                                  ldb_dn_get_parent(msg, req->op.rename.newdn));
 654         if (msg->r.ModifyDNRequest.newsuperior == NULL) {
 655                 talloc_free(msg);
 656                 return LDB_ERR_INVALID_DN_SYNTAX;
 657         }
 658
 659         msg->r.ModifyDNRequest.deleteolddn = True;
 660
 661         return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
 662 }
 663
 664 static int ildb_start_trans(struct ldb_module *module)
 665 {
 666         /* TODO implement a local locking mechanism here */
 667
 668         return LDB_SUCCESS;
 669 }
 670
 671 static int ildb_end_trans(struct ldb_module *module)
 672 {
 673         /* TODO implement a local transaction mechanism here */
 674
 675         return LDB_SUCCESS;
 676 }
 677
 678 static int ildb_del_trans(struct ldb_module *module)
 679 {
 680         /* TODO implement a local locking mechanism here */
 681
 682         return LDB_SUCCESS;
 683 }
 684
 685 static int ildb_request(struct ldb_module *module, struct ldb_request *req)
 686 {
 687         return LDB_ERR_OPERATIONS_ERROR;
 688 }
 689
 690 static int ildb_wait(struct ldb_handle *handle, enum ldb_wait_type type)
 691 {
 692         struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
 693
 694         if (handle->state == LDB_ASYNC_DONE) {
 695                 return handle->status;
 696         }
 697
 698         if (!ac) {
 699                 return LDB_ERR_OPERATIONS_ERROR;
 700         }
 701
 702         handle->state = LDB_ASYNC_INIT;
 703
 704         switch(type) {
 705         case LDB_WAIT_NONE:
 706                 if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
 707                         return LDB_ERR_OTHER;
 708                 }
 709                 break;
 710         case LDB_WAIT_ALL:
 711                 while (handle->status == LDB_SUCCESS && handle->state != LDB_ASYNC_DONE) {
 712                         if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
 713                                 return LDB_ERR_OTHER;
 714                         }
 715                 }
 716                 break;
 717         default:
 718                 return LDB_ERR_OPERATIONS_ERROR;
 719         }
 720
 721         return handle->status;
 722 }
 723
 724 static const struct ldb_module_ops ildb_ops = {
 725         .name              = "ldap",
 726         .search            = ildb_search,
 727         .add               = ildb_add,
 728         .modify            = ildb_modify,
 729         .del               = ildb_delete,
 730         .rename            = ildb_rename,
 731         .request           = ildb_request,
 732         .start_transaction = ildb_start_trans,
 733         .end_transaction   = ildb_end_trans,
 734         .del_transaction   = ildb_del_trans,
 735         .wait              = ildb_wait
 736 };
 737
 738 /*
 739   connect to the database
 740 */
 741 static int ildb_connect(struct ldb_context *ldb, const char *url,
 742                         unsigned int flags, const char *options[],
 743                         struct ldb_module **module)
 744 {
 745         struct ildb_private *ildb = NULL;
 746         NTSTATUS status;
 747         struct cli_credentials *creds;
 748
 749         ildb = talloc(ldb, struct ildb_private);
 750         if (!ildb) {
 751                 ldb_oom(ldb);
 752                 goto failed;
 753         }
 754
 755         ildb->ldb     = ldb;
 756
 757         ildb->ldap = ldap4_new_connection(ildb, ldb_get_opaque(ldb, "EventContext"));
 758         if (!ildb->ldap) {
 759                 ldb_oom(ldb);
 760                 goto failed;
 761         }
 762
 763         if (flags & LDB_FLG_RECONNECT) {
 764                 ldap_set_reconn_params(ildb->ldap, 10);
 765         }
 766
 767         status = ldap_connect(ildb->ldap, url);
 768         if (!NT_STATUS_IS_OK(status)) {
 769                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to connect to ldap URL '%s' - %s\n",
 770                           url, ldap_errstr(ildb->ldap, status));
 771                 goto failed;
 772         }
 773
 774
 775         *module = talloc(ldb, struct ldb_module);
 776         if (!module) {
 777                 ldb_oom(ldb);
 778                 talloc_free(ildb);
 779                 return -1;
 780         }
 781         talloc_set_name_const(*module, "ldb_ildap backend");
 782         (*module)->ldb = ldb;
 783         (*module)->prev = (*module)->next = NULL;
 784         (*module)->private_data = ildb;
 785         (*module)->ops = &ildb_ops;
 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, status));
 804                                 goto failed;
 805                         }
 806                 } else {
 807                         status = ldap_bind_sasl(ildb->ldap, creds);
 808                         if (!NT_STATUS_IS_OK(status)) {
 809                                 ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s\n",
 810                                           ldap_errstr(ildb->ldap, status));
 811                                 goto failed;
 812                         }
 813                 }
 814         }
 815
 816         return 0;
 817
 818 failed:
 819         talloc_free(ildb);
 820         return -1;
 821 }
 822
 823 int ldb_ildap_init(void)
 824 {
 825         return ldb_register_backend("ldap", ildb_connect) +
 826                    ldb_register_backend("ldapi", ildb_connect) +
 827                    ldb_register_backend("ldaps", ildb_connect);
 828 }