source4/lib/ldb/common/ldb_modules.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Simo Sorce  2004-2008
   5
   6      ** NOTE! The following LGPL license applies to the ldb
   7      ** library. This does NOT imply that all of Samba is released
   8      ** under the LGPL
   9
  10    This library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 3 of the License, or (at your option) any later version.
  14
  15    This library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 /*
  25  *  Name: ldb
  26  *
  27  *  Component: ldb modules core
  28  *
  29  *  Description: core modules routines
  30  *
  31  *  Author: Simo Sorce
  32  */
  33
  34 #include "ldb_includes.h"
  35
  36 #if (_SAMBA_BUILD_ >= 4)
  37 #include "includes.h"
  38 #endif
  39
  40 #define LDB_MODULE_PREFIX       "modules:"
  41 #define LDB_MODULE_PREFIX_LEN   8
  42
  43 void ldb_set_modules_dir(struct ldb_context *ldb, const char *path)
  44 {
  45         talloc_free(ldb->modules_dir);
  46         ldb->modules_dir = talloc_strdup(ldb, path);
  47 }
  48
  49 static char *ldb_modules_strdup_no_spaces(TALLOC_CTX *mem_ctx, const char *string)
  50 {
  51         int i, len;
  52         char *trimmed;
  53
  54         trimmed = talloc_strdup(mem_ctx, string);
  55         if (!trimmed) {
  56                 return NULL;
  57         }
  58
  59         len = strlen(trimmed);
  60         for (i = 0; trimmed[i] != '\0'; i++) {
  61                 switch (trimmed[i]) {
  62                 case ' ':
  63                 case '\t':
  64                 case '\n':
  65                         memmove(&trimmed[i], &trimmed[i + 1], len -i -1);
  66                         break;
  67                 }
  68         }
  69
  70         return trimmed;
  71 }
  72
  73
  74 /* modules are called in inverse order on the stack.
  75    Lets place them as an admin would think the right order is.
  76    Modules order is important */
  77 const char **ldb_modules_list_from_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const char *string)
  78 {
  79         char **modules = NULL;
  80         const char **m;
  81         char *modstr, *p;
  82         int i;
  83
  84         /* spaces not admitted */
  85         modstr = ldb_modules_strdup_no_spaces(mem_ctx, string);
  86         if ( ! modstr) {
  87                 ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_strdup_no_spaces()\n");
  88                 return NULL;
  89         }
  90
  91         modules = talloc_realloc(mem_ctx, modules, char *, 2);
  92         if ( ! modules ) {
  93                 ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_list_from_string()\n");
  94                 talloc_free(modstr);
  95                 return NULL;
  96         }
  97         talloc_steal(modules, modstr);
  98
  99         i = 0;
 100         /* The str*r*chr walks backwards:  This is how we get the inverse order mentioned above */
 101         while ((p = strrchr(modstr, ',')) != NULL) {
 102                 *p = '\0';
 103                 p++;
 104                 modules[i] = p;
 105
 106                 i++;
 107                 modules = talloc_realloc(mem_ctx, modules, char *, i + 2);
 108                 if ( ! modules ) {
 109                         ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_list_from_string()\n");
 110                         return NULL;
 111                 }
 112
 113         }
 114         modules[i] = modstr;
 115
 116         modules[i + 1] = NULL;
 117
 118         m = (const char **)modules;
 119
 120         return m;
 121 }
 122
 123 static struct backends_list_entry {
 124         struct ldb_backend_ops *ops;
 125         struct backends_list_entry *prev, *next;
 126 } *ldb_backends = NULL;
 127
 128 static struct ops_list_entry {
 129         const struct ldb_module_ops *ops;
 130         struct ops_list_entry *next;
 131 } *registered_modules = NULL;
 132
 133 static const struct ldb_builtins {
 134         const struct ldb_backend_ops *backend_ops;
 135         const struct ldb_module_ops *module_ops;
 136 } builtins[];
 137
 138 static ldb_connect_fn ldb_find_backend(const char *url)
 139 {
 140         struct backends_list_entry *backend;
 141         int i;
 142
 143         for (i = 0; builtins[i].backend_ops || builtins[i].module_ops; i++) {
 144                 if (builtins[i].backend_ops == NULL) continue;
 145
 146                 if (strncmp(builtins[i].backend_ops->name, url,
 147                             strlen(builtins[i].backend_ops->name)) == 0) {
 148                         return builtins[i].backend_ops->connect_fn;
 149                 }
 150         }
 151
 152         for (backend = ldb_backends; backend; backend = backend->next) {
 153                 if (strncmp(backend->ops->name, url,
 154                             strlen(backend->ops->name)) == 0) {
 155                         return backend->ops->connect_fn;
 156                 }
 157         }
 158
 159         return NULL;
 160 }
 161
 162 /*
 163  register a new ldb backend
 164 */
 165 int ldb_register_backend(const char *url_prefix, ldb_connect_fn connectfn)
 166 {
 167         struct ldb_backend_ops *backend;
 168         struct backends_list_entry *entry;
 169
 170         backend = talloc(talloc_autofree_context(), struct ldb_backend_ops);
 171         if (!backend) return LDB_ERR_OPERATIONS_ERROR;
 172
 173         entry = talloc(talloc_autofree_context(), struct backends_list_entry);
 174         if (!entry) {
 175                 talloc_free(backend);
 176                 return LDB_ERR_OPERATIONS_ERROR;
 177         }
 178
 179         if (ldb_find_backend(url_prefix)) {
 180                 return LDB_SUCCESS;
 181         }
 182
 183         /* Maybe check for duplicity here later on? */
 184
 185         backend->name = talloc_strdup(backend, url_prefix);
 186         backend->connect_fn = connectfn;
 187         entry->ops = backend;
 188         DLIST_ADD(ldb_backends, entry);
 189
 190         return LDB_SUCCESS;
 191 }
 192
 193 /*
 194    Return the ldb module form of a database.
 195    The URL can either be one of the following forms
 196    ldb://path
 197    ldapi://path
 198
 199    flags is made up of LDB_FLG_*
 200
 201    the options are passed uninterpreted to the backend, and are
 202    backend specific.
 203
 204    This allows modules to get at only the backend module, for example where a
 205    module may wish to direct certain requests at a particular backend.
 206 */
 207 int ldb_connect_backend(struct ldb_context *ldb,
 208                         const char *url,
 209                         const char *options[],
 210                         struct ldb_module **backend_module)
 211 {
 212         int ret;
 213         char *backend;
 214         ldb_connect_fn fn;
 215
 216         if (strchr(url, ':') != NULL) {
 217                 backend = talloc_strndup(ldb, url, strchr(url, ':')-url);
 218         } else {
 219                 /* Default to tdb */
 220                 backend = talloc_strdup(ldb, "tdb");
 221         }
 222
 223         fn = ldb_find_backend(backend);
 224
 225         if (fn == NULL) {
 226                 struct ldb_backend_ops *ops;
 227                 char *symbol_name = talloc_asprintf(ldb, "ldb_%s_backend_ops", backend);
 228                 if (symbol_name == NULL) {
 229                         return LDB_ERR_OPERATIONS_ERROR;
 230                 }
 231                 ops = ldb_dso_load_symbol(ldb, backend, symbol_name);
 232                 if (ops != NULL) {
 233                         fn = ops->connect_fn;
 234                 }
 235                 talloc_free(symbol_name);
 236         }
 237
 238         talloc_free(backend);
 239
 240         if (fn == NULL) {
 241                 ldb_debug(ldb, LDB_DEBUG_FATAL,
 242                           "Unable to find backend for '%s'\n", url);
 243                 return LDB_ERR_OTHER;
 244         }
 245
 246         ret = fn(ldb, url, ldb->flags, options, backend_module);
 247
 248         if (ret != LDB_SUCCESS) {
 249                 ldb_debug(ldb, LDB_DEBUG_ERROR,
 250                           "Failed to connect to '%s'\n", url);
 251                 return ret;
 252         }
 253         return ret;
 254 }
 255
 256 static const struct ldb_module_ops *ldb_find_module_ops(const char *name)
 257 {
 258         struct ops_list_entry *e;
 259         int i;
 260
 261         for (i = 0; builtins[i].backend_ops || builtins[i].module_ops; i++) {
 262                 if (builtins[i].module_ops == NULL) continue;
 263
 264                 if (strcmp(builtins[i].module_ops->name, name) == 0)
 265                         return builtins[i].module_ops;
 266         }
 267
 268         for (e = registered_modules; e; e = e->next) {
 269                 if (strcmp(e->ops->name, name) == 0)
 270                         return e->ops;
 271         }
 272
 273         return NULL;
 274 }
 275
 276
 277 int ldb_register_module(const struct ldb_module_ops *ops)
 278 {
 279         struct ops_list_entry *entry = talloc(talloc_autofree_context(), struct ops_list_entry);
 280
 281         if (ldb_find_module_ops(ops->name) != NULL)
 282                 return -1;
 283
 284         if (entry == NULL)
 285                 return -1;
 286
 287         entry->ops = ops;
 288         entry->next = registered_modules;
 289         registered_modules = entry;
 290
 291         return 0;
 292 }
 293
 294 void *ldb_dso_load_symbol(struct ldb_context *ldb, const char *name,
 295                             const char *symbol)
 296 {
 297         char *path;
 298         void *handle;
 299         void *sym;
 300
 301         if (ldb->modules_dir == NULL)
 302                 return NULL;
 303
 304         path = talloc_asprintf(ldb, "%s/%s.%s", ldb->modules_dir, name,
 305                                SHLIBEXT);
 306
 307         ldb_debug(ldb, LDB_DEBUG_TRACE, "trying to load %s from %s\n", name, path);
 308
 309         handle = dlopen(path, RTLD_NOW);
 310         if (handle == NULL) {
 311                 ldb_debug(ldb, LDB_DEBUG_WARNING, "unable to load %s from %s: %s\n", name, path, dlerror());
 312                 return NULL;
 313         }
 314
 315         sym = (int (*)(void))dlsym(handle, symbol);
 316
 317         if (sym == NULL) {
 318                 ldb_debug(ldb, LDB_DEBUG_ERROR, "no symbol `%s' found in %s: %s\n", symbol, path, dlerror());
 319                 return NULL;
 320         }
 321
 322         talloc_free(path);
 323
 324         return sym;
 325 }
 326
 327 int ldb_load_modules_list(struct ldb_context *ldb, const char **module_list, struct ldb_module *backend, struct ldb_module **out)
 328 {
 329         struct ldb_module *module;
 330         int i;
 331
 332         module = backend;
 333
 334         for (i = 0; module_list[i] != NULL; i++) {
 335                 struct ldb_module *current;
 336                 const struct ldb_module_ops *ops;
 337
 338                 ops = ldb_find_module_ops(module_list[i]);
 339                 if (ops == NULL) {
 340                         char *symbol_name = talloc_asprintf(ldb, "ldb_%s_module_ops",
 341                                                                                                 module_list[i]);
 342                         if (symbol_name == NULL) {
 343                                 return LDB_ERR_OPERATIONS_ERROR;
 344                         }
 345                         ops = ldb_dso_load_symbol(ldb, module_list[i], symbol_name);
 346                         talloc_free(symbol_name);
 347                 }
 348
 349                 if (ops == NULL) {
 350                         ldb_debug(ldb, LDB_DEBUG_WARNING, "WARNING: Module [%s] not found\n",
 351                                   module_list[i]);
 352                         continue;
 353                 }
 354
 355                 current = talloc_zero(ldb, struct ldb_module);
 356                 if (current == NULL) {
 357                         return LDB_ERR_OPERATIONS_ERROR;
 358                 }
 359                 talloc_set_name(current, "ldb_module: %s", module_list[i]);
 360
 361                 current->ldb = ldb;
 362                 current->ops = ops;
 363
 364                 DLIST_ADD(module, current);
 365         }
 366         *out = module;
 367         return LDB_SUCCESS;
 368 }
 369
 370 int ldb_init_module_chain(struct ldb_context *ldb, struct ldb_module *module)
 371 {
 372         while (module && module->ops->init_context == NULL)
 373                 module = module->next;
 374
 375         /* init is different in that it is not an error if modules
 376          * do not require initialization */
 377
 378         if (module) {
 379                 int ret = module->ops->init_context(module);
 380                 if (ret != LDB_SUCCESS) {
 381                         ldb_debug(ldb, LDB_DEBUG_FATAL, "module %s initialization failed\n", module->ops->name);
 382                         return ret;
 383                 }
 384         }
 385
 386         return LDB_SUCCESS;
 387 }
 388
 389 int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 390 {
 391         const char **modules = NULL;
 392         int i;
 393         int ret;
 394         TALLOC_CTX *mem_ctx = talloc_new(ldb);
 395         if (!mem_ctx) {
 396                 return LDB_ERR_OPERATIONS_ERROR;
 397         }
 398
 399         /* find out which modules we are requested to activate */
 400
 401         /* check if we have a custom module list passd as ldb option */
 402         if (options) {
 403                 for (i = 0; options[i] != NULL; i++) {
 404                         if (strncmp(options[i], LDB_MODULE_PREFIX, LDB_MODULE_PREFIX_LEN) == 0) {
 405                                 modules = ldb_modules_list_from_string(ldb, mem_ctx, &options[i][LDB_MODULE_PREFIX_LEN]);
 406                         }
 407                 }
 408         }
 409
 410         /* if not overloaded by options and the backend is not ldap try to load the modules list from ldb */
 411         if ((modules == NULL) && (strcmp("ldap", ldb->modules->ops->name) != 0)) {
 412                 const char * const attrs[] = { "@LIST" , NULL};
 413                 struct ldb_result *res = NULL;
 414                 struct ldb_dn *mods_dn;
 415
 416                 mods_dn = ldb_dn_new(mem_ctx, ldb, "@MODULES");
 417                 if (mods_dn == NULL) {
 418                         talloc_free(mem_ctx);
 419                         return -1;
 420                 }
 421
 422                 ret = ldb_search(ldb, mods_dn, &res, mods_dn, LDB_SCOPE_BASE, attrs, "@LIST=*");
 423
 424                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 425                         ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db");
 426                 } else if (ret != LDB_SUCCESS) {
 427                         ldb_debug(ldb, LDB_DEBUG_FATAL, "ldb error (%s) occurred searching for modules, bailing out\n", ldb_errstring(ldb));
 428                         talloc_free(mem_ctx);
 429                         return ret;
 430                 } else {
 431                         const char *module_list;
 432                         if (res->count == 0) {
 433                                 ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db");
 434                         } else if (res->count > 1) {
 435                                 ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found (%d), bailing out\n", res->count);
 436                                 talloc_free(mem_ctx);
 437                                 return -1;
 438                         } else {
 439                                 module_list = ldb_msg_find_attr_as_string(res->msgs[0], "@LIST", NULL);
 440                                 if (!module_list) {
 441                                         ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db");
 442                                 }
 443                                 modules = ldb_modules_list_from_string(ldb, mem_ctx,
 444                                                                module_list);
 445                         }
 446                 }
 447
 448                 talloc_free(mods_dn);
 449         }
 450
 451         if (modules != NULL) {
 452                 ret = ldb_load_modules_list(ldb, modules, ldb->modules, &ldb->modules);
 453                 if (ret != LDB_SUCCESS) {
 454                         talloc_free(mem_ctx);
 455                         return ret;
 456                 }
 457         } else {
 458                 ldb_debug(ldb, LDB_DEBUG_TRACE, "No modules specified for this database");
 459         }
 460
 461         ret = ldb_init_module_chain(ldb, ldb->modules);
 462         talloc_free(mem_ctx);
 463         return ret;
 464 }
 465
 466 /*
 467   by using this we allow ldb modules to only implement the functions they care about,
 468   which makes writing a module simpler, and makes it more likely to keep working
 469   when ldb is extended
 470 */
 471 #define FIND_OP(module, op) do { \
 472         struct ldb_context *ldb = module->ldb; \
 473         module = module->next; \
 474         while (module && module->ops->op == NULL) module = module->next; \
 475         if (module == NULL) { \
 476                 ldb_asprintf_errstring(ldb, "Unable to find backend operation for " #op ); \
 477                 return LDB_ERR_OPERATIONS_ERROR;        \
 478         }                                               \
 479 } while (0)
 480
 481
 482 /*
 483    helper functions to call the next module in chain
 484 */
 485
 486 int ldb_next_request(struct ldb_module *module, struct ldb_request *request)
 487 {
 488         int ret;
 489
 490         if (request->callback == NULL) {
 491                 ldb_set_errstring(module->ldb, "Requests MUST define callbacks");
 492                 return LDB_ERR_UNWILLING_TO_PERFORM;
 493         }
 494
 495         switch (request->operation) {
 496         case LDB_SEARCH:
 497                 FIND_OP(module, search);
 498                 ret = module->ops->search(module, request);
 499                 break;
 500         case LDB_ADD:
 501                 FIND_OP(module, add);
 502                 ret = module->ops->add(module, request);
 503                 break;
 504         case LDB_MODIFY:
 505                 FIND_OP(module, modify);
 506                 ret = module->ops->modify(module, request);
 507                 break;
 508         case LDB_DELETE:
 509                 FIND_OP(module, del);
 510                 ret = module->ops->del(module, request);
 511                 break;
 512         case LDB_RENAME:
 513                 FIND_OP(module, rename);
 514                 ret = module->ops->rename(module, request);
 515                 break;
 516         case LDB_EXTENDED:
 517                 FIND_OP(module, extended);
 518                 ret = module->ops->extended(module, request);
 519                 break;
 520         case LDB_SEQUENCE_NUMBER:
 521                 FIND_OP(module, sequence_number);
 522                 ret = module->ops->sequence_number(module, request);
 523                 break;
 524         default:
 525                 FIND_OP(module, request);
 526                 ret = module->ops->request(module, request);
 527                 break;
 528         }
 529         if (ret == LDB_SUCCESS) {
 530                 return ret;
 531         }
 532         if (!ldb_errstring(module->ldb)) {
 533                 /* Set a default error string, to place the blame somewhere */
 534                 ldb_asprintf_errstring(module->ldb, "error in module %s: %s (%d)", module->ops->name, ldb_strerror(ret), ret);
 535         }
 536         return ret;
 537 }
 538
 539 int ldb_next_init(struct ldb_module *module)
 540 {
 541         module = module->next;
 542
 543         return ldb_init_module_chain(module->ldb, module);
 544 }
 545
 546 int ldb_next_start_trans(struct ldb_module *module)
 547 {
 548         FIND_OP(module, start_transaction);
 549         return module->ops->start_transaction(module);
 550 }
 551
 552 int ldb_next_end_trans(struct ldb_module *module)
 553 {
 554         FIND_OP(module, end_transaction);
 555         return module->ops->end_transaction(module);
 556 }
 557
 558 int ldb_next_del_trans(struct ldb_module *module)
 559 {
 560         FIND_OP(module, del_transaction);
 561         return module->ops->del_transaction(module);
 562 }
 563
 564 struct ldb_handle *ldb_handle_new(TALLOC_CTX *mem_ctx, struct ldb_context *ldb)
 565 {
 566         struct ldb_handle *h;
 567
 568         h = talloc_zero(mem_ctx, struct ldb_handle);
 569         if (h == NULL) {
 570                 ldb_set_errstring(ldb, "Out of Memory");
 571                 return NULL;
 572         }
 573
 574         h->status = LDB_SUCCESS;
 575         h->state = LDB_ASYNC_INIT;
 576         h->ldb = ldb;
 577
 578         return h;
 579 }
 580
 581 /* calls the request callback to send an entry
 582  *
 583  * params:
 584  *      req: the original request passed to your module
 585  *      msg: reply message (must be a talloc pointer, and it will be stolen
 586  *           on the ldb_reply that is sent to the callback)
 587  */
 588
 589 int ldb_module_send_entry(struct ldb_request *req,
 590                           struct ldb_message *msg)
 591 {
 592         struct ldb_reply *ares;
 593
 594         ares = talloc_zero(req, struct ldb_reply);
 595         if (!ares) {
 596                 ldb_oom(req->handle->ldb);
 597                 req->callback(req, NULL);
 598                 return LDB_ERR_OPERATIONS_ERROR;
 599         }
 600         ares->type = LDB_REPLY_ENTRY;
 601         ares->message = talloc_steal(ares, msg);
 602         ares->error = LDB_SUCCESS;
 603
 604         return req->callback(req, ares);
 605 }
 606
 607 /* calls the request callback to send an referrals
 608  *
 609  * params:
 610  *      req: the original request passed to your module
 611  *      ref: referral string (must be a talloc pointeri, steal)
 612  */
 613
 614 int ldb_module_send_referral(struct ldb_request *req,
 615                                            char *ref)
 616 {
 617         struct ldb_reply *ares;
 618
 619         ares = talloc_zero(req, struct ldb_reply);
 620         if (!ares) {
 621                 ldb_oom(req->handle->ldb);
 622                 req->callback(req, NULL);
 623                 return LDB_ERR_OPERATIONS_ERROR;
 624         }
 625         ares->type = LDB_REPLY_REFERRAL;
 626         ares->referral = talloc_steal(ares, ref);
 627         ares->error = LDB_SUCCESS;
 628
 629         return req->callback(req, ares);
 630 }
 631
 632 /* calls the original request callback
 633  *
 634  * params:
 635  *      req:   the original request passed to your module
 636  *      ctrls: controls to send in the reply (must be a talloc pointer, steal)
 637  *      response: results for extended request (steal)
 638  *      error: LDB_SUCCESS for a succesful return
 639  *             any other ldb error otherwise
 640  */
 641 int ldb_module_done(struct ldb_request *req,
 642                     struct ldb_control **ctrls,
 643                     struct ldb_extended *response,
 644                     int error)
 645 {
 646         struct ldb_reply *ares;
 647
 648         ares = talloc_zero(req, struct ldb_reply);
 649         if (!ares) {
 650                 ldb_oom(req->handle->ldb);
 651                 req->callback(req, NULL);
 652                 return LDB_ERR_OPERATIONS_ERROR;
 653         }
 654         ares->type = LDB_REPLY_DONE;
 655         ares->controls = talloc_steal(ares, ctrls);
 656         ares->response = talloc_steal(ares, response);
 657         ares->error = error;
 658
 659         req->callback(req, ares);
 660         return error;
 661 }
 662
 663 /* to be used *only* in modules init functions.
 664  * this function i synchronous and will register
 665  * the requested OID in the rootdse module if present
 666  * otherwise it will return an error */
 667 int ldb_mod_register_control(struct ldb_module *module, const char *oid)
 668 {
 669         struct ldb_request *req;
 670         int ret;
 671
 672         req = talloc_zero(module, struct ldb_request);
 673         if (req == NULL) {
 674                 return LDB_ERR_OPERATIONS_ERROR;
 675         }
 676
 677         req->operation = LDB_REQ_REGISTER_CONTROL;
 678         req->op.reg_control.oid = oid;
 679         req->callback = ldb_op_default_callback;
 680
 681         ldb_set_timeout(module->ldb, req, 0);
 682
 683         req->handle = ldb_handle_new(req, module->ldb);
 684         if (req->handle == NULL) {
 685                 return LDB_ERR_OPERATIONS_ERROR;
 686         }
 687
 688         ret = ldb_request(module->ldb, req);
 689         if (ret == LDB_SUCCESS) {
 690                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
 691         }
 692         talloc_free(req);
 693
 694         return ret;
 695 }
 696
 697 #ifndef STATIC_LIBLDB_MODULES
 698
 699 #ifdef HAVE_LDB_LDAP
 700 #define LDAP_BACKEND LDB_BACKEND(ldap), LDB_BACKEND(ldapi), LDB_BACKEND(ldaps),
 701 #else
 702 #define LDAP_BACKEND
 703 #endif
 704
 705 #ifdef HAVE_LDB_SQLITE3
 706 #define SQLITE3_BACKEND LDB_BACKEND(sqlite3),
 707 #else
 708 #define SQLITE3_BACKEND
 709 #endif
 710
 711 #define STATIC_LIBLDB_MODULES \
 712         LDB_BACKEND(tdb),       \
 713         LDAP_BACKEND    \
 714         SQLITE3_BACKEND \
 715         LDB_MODULE(operational),        \
 716         LDB_MODULE(rdn_name),   \
 717         LDB_MODULE(paged_results),      \
 718         LDB_MODULE(server_sort),                \
 719         LDB_MODULE(asq), \
 720         NULL
 721 #endif
 722
 723 /*
 724  * this is a bit hacked, as STATIC_LIBLDB_MODULES contains ','
 725  * between the elements and we want to autogenerate the
 726  * extern struct declarations, so we do some hacks and let the
 727  * ',' appear in an unused function prototype.
 728  */
 729 #undef NULL
 730 #define NULL LDB_MODULE(NULL),
 731
 732 #define LDB_BACKEND(name) \
 733         int); \
 734         extern const struct ldb_backend_ops ldb_ ## name ## _backend_ops;\
 735         extern void ldb_noop ## name (int
 736 #define LDB_MODULE(name) \
 737         int); \
 738         extern const struct ldb_module_ops ldb_ ## name ## _module_ops;\
 739         extern void ldb_noop ## name (int
 740
 741 extern void ldb_start_noop(int,
 742 STATIC_LIBLDB_MODULES
 743 int);
 744
 745 #undef NULL
 746 #define NULL { \
 747         .backend_ops = (void *)0, \
 748         .module_ops = (void *)0 \
 749 }
 750
 751 #undef LDB_BACKEND
 752 #define LDB_BACKEND(name) { \
 753         .backend_ops = &ldb_ ## name ## _backend_ops, \
 754         .module_ops = (void *)0 \
 755 }
 756 #undef LDB_MODULE
 757 #define LDB_MODULE(name) { \
 758         .backend_ops = (void *)0, \
 759         .module_ops = &ldb_ ## name ## _module_ops \
 760 }
 761
 762 static const struct ldb_builtins builtins[] = {
 763         STATIC_LIBLDB_MODULES
 764 };