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