src/openldap.c

   1 /**
   2  * collectd - src/openldap.c
   3  * Copyright (C) 2011       Kimo Rosenbaum
   4  * Copyright (C) 2014-2015  Marc Fournier
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *   Kimo Rosenbaum <kimor79 at yahoo.com>
  26  *   Marc Fournier <marc.fournier at camptocamp.com>
  27  **/
  28
  29 #include "collectd.h"
  30
  31 #include "common.h"
  32 #include "plugin.h"
  33
  34 #if defined(__APPLE__)
  35 #pragma clang diagnostic push
  36 #pragma clang diagnostic warning "-Wdeprecated-declarations"
  37 #endif
  38
  39 #include <lber.h>
  40 #include <ldap.h>
  41
  42 struct cldap_s /* {{{ */
  43 {
  44         char *name;
  45
  46         char *binddn;
  47         char *password;
  48         char *cacert;
  49         char *host;
  50         int   state;
  51         _Bool starttls;
  52         int   timeout;
  53         char *url;
  54         _Bool verifyhost;
  55         int   version;
  56
  57         LDAP *ld;
  58 };
  59 typedef struct cldap_s cldap_t; /* }}} */
  60
  61 static cldap_t **databases   = NULL;
  62 static size_t  databases_num = 0;
  63
  64 static void cldap_free (cldap_t *st) /* {{{ */
  65 {
  66         if (st == NULL)
  67                 return;
  68
  69         sfree (st->binddn);
  70         sfree (st->password);
  71         sfree (st->cacert);
  72         sfree (st->host);
  73         sfree (st->name);
  74         sfree (st->url);
  75         if (st->ld)
  76                 ldap_memfree (st->ld);
  77         sfree (st);
  78 } /* }}} void cldap_free */
  79
  80 /* initialize ldap for each host */
  81 static int cldap_init_host (cldap_t *st) /* {{{ */
  82 {
  83         LDAP *ld;
  84         int rc;
  85
  86         if (st->state && st->ld)
  87         {
  88                 DEBUG ("openldap plugin: Already connected to %s", st->url);
  89                 return (0);
  90         }
  91
  92         rc = ldap_initialize (&ld, st->url);
  93         if (rc != LDAP_SUCCESS)
  94         {
  95                 ERROR ("openldap plugin: ldap_initialize failed: %s",
  96                         ldap_err2string (rc));
  97                 st->state = 0;
  98                 ldap_unbind_ext_s (ld, NULL, NULL);
  99                 return (-1);
 100         }
 101
 102         st->ld = ld;
 103
 104         ldap_set_option (st->ld, LDAP_OPT_PROTOCOL_VERSION, &st->version);
 105
 106         ldap_set_option (st->ld, LDAP_OPT_TIMEOUT,
 107                 &(const struct timeval){st->timeout, 0});
 108
 109         ldap_set_option (st->ld, LDAP_OPT_RESTART, LDAP_OPT_ON);
 110
 111         if (st->cacert != NULL)
 112                 ldap_set_option (st->ld, LDAP_OPT_X_TLS_CACERTFILE, st->cacert);
 113
 114         if (st->verifyhost == 0)
 115         {
 116                 int never = LDAP_OPT_X_TLS_NEVER;
 117                 ldap_set_option (st->ld, LDAP_OPT_X_TLS_REQUIRE_CERT, &never);
 118         }
 119
 120         if (st->starttls != 0)
 121         {
 122                 rc = ldap_start_tls_s (ld, NULL, NULL);
 123                 if (rc != LDAP_SUCCESS)
 124                 {
 125                         ERROR ("openldap plugin: Failed to start tls on %s: %s",
 126                                         st->url, ldap_err2string (rc));
 127                         st->state = 0;
 128                         ldap_unbind_ext_s (st->ld, NULL, NULL);
 129                         return (-1);
 130                 }
 131         }
 132
 133         struct berval cred;
 134         if (st->password != NULL)
 135         {
 136                 cred.bv_val = st->password;
 137                 cred.bv_len = strlen (st->password);
 138         }
 139         else
 140         {
 141                 cred.bv_val = "";
 142                 cred.bv_len = 0;
 143         }
 144
 145         rc = ldap_sasl_bind_s (st->ld, st->binddn, LDAP_SASL_SIMPLE, &cred,
 146                         NULL, NULL, NULL);
 147         if (rc != LDAP_SUCCESS)
 148         {
 149                 ERROR ("openldap plugin: Failed to bind to %s: %s",
 150                                 st->url, ldap_err2string (rc));
 151                 st->state = 0;
 152                 ldap_unbind_ext_s (st->ld, NULL, NULL);
 153                 return (-1);
 154         }
 155         else
 156         {
 157                 DEBUG ("openldap plugin: Successfully connected to %s",
 158                                 st->url);
 159                 st->state = 1;
 160                 return (0);
 161         }
 162 } /* }}} static cldap_init_host */
 163
 164 static void cldap_submit_value (const char *type, const char *type_instance, /* {{{ */
 165                 value_t value, cldap_t *st)
 166 {
 167         value_list_t vl = VALUE_LIST_INIT;
 168
 169         vl.values     = &value;
 170         vl.values_len = 1;
 171
 172         if ((st->host == NULL)
 173                         || (strcmp ("", st->host) == 0)
 174                         || (strcmp ("localhost", st->host) == 0))
 175                 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 176         else
 177                 sstrncpy (vl.host, st->host, sizeof (vl.host));
 178
 179         sstrncpy (vl.plugin, "openldap", sizeof (vl.plugin));
 180         if (st->name != NULL)
 181                 sstrncpy (vl.plugin_instance, st->name,
 182                                 sizeof (vl.plugin_instance));
 183
 184         sstrncpy (vl.type, type, sizeof (vl.type));
 185         if (type_instance != NULL)
 186                 sstrncpy (vl.type_instance, type_instance,
 187                                 sizeof (vl.type_instance));
 188
 189         plugin_dispatch_values (&vl);
 190 } /* }}} void cldap_submit_value */
 191
 192 static void cldap_submit_derive (const char *type, const char *type_instance, /* {{{ */
 193                 derive_t d, cldap_t *st)
 194 {
 195         value_t v;
 196         v.derive = d;
 197         cldap_submit_value (type, type_instance, v, st);
 198 } /* }}} void cldap_submit_derive */
 199
 200 static void cldap_submit_gauge (const char *type, const char *type_instance, /* {{{ */
 201                 gauge_t g, cldap_t *st)
 202 {
 203         value_t v;
 204         v.gauge = g;
 205         cldap_submit_value (type, type_instance, v, st);
 206 } /* }}} void cldap_submit_gauge */
 207
 208 static int cldap_read_host (user_data_t *ud) /* {{{ */
 209 {
 210         cldap_t *st;
 211         LDAPMessage *result;
 212         char *dn;
 213         int rc;
 214         int status;
 215
 216         char *attrs[9] = { "monitorCounter",
 217                                 "monitorOpCompleted",
 218                                 "monitorOpInitiated",
 219                                 "monitoredInfo",
 220                                 "olmBDBEntryCache",
 221                                 "olmBDBDNCache",
 222                                 "olmBDBIDLCache",
 223                                 "namingContexts",
 224                                 NULL };
 225
 226         if ((ud == NULL) || (ud->data == NULL))
 227         {
 228                 ERROR ("openldap plugin: cldap_read_host: Invalid user data.");
 229                 return (-1);
 230         }
 231
 232         st = (cldap_t *) ud->data;
 233
 234         status = cldap_init_host (st);
 235         if (status != 0)
 236                 return (-1);
 237
 238         rc = ldap_search_ext_s (st->ld, "cn=Monitor", LDAP_SCOPE_SUBTREE,
 239                 "(|(!(cn=* *))(cn=Database*))", attrs, 0,
 240                 NULL, NULL, NULL, 0, &result);
 241
 242         if (rc != LDAP_SUCCESS)
 243         {
 244                 ERROR ("openldap plugin: Failed to execute search: %s",
 245                                 ldap_err2string (rc));
 246                 ldap_msgfree (result);
 247                 st->state = 0;
 248                 ldap_unbind_ext_s (st->ld, NULL, NULL);
 249                 return (-1);
 250         }
 251
 252         for (LDAPMessage *e = ldap_first_entry (st->ld, result); e != NULL;
 253                 e = ldap_next_entry (st->ld, e))
 254         {
 255                 if ((dn = ldap_get_dn (st->ld, e)) != NULL)
 256                 {
 257                         unsigned long long counter = 0;
 258                         unsigned long long opc = 0;
 259                         unsigned long long opi = 0;
 260                         unsigned long long info = 0;
 261
 262                         struct berval counter_data;
 263                         struct berval opc_data;
 264                         struct berval opi_data;
 265                         struct berval info_data;
 266                         struct berval olmbdb_data;
 267                         struct berval nc_data;
 268
 269                         struct berval **counter_list;
 270                         struct berval **opc_list;
 271                         struct berval **opi_list;
 272                         struct berval **info_list;
 273                         struct berval **olmbdb_list;
 274                         struct berval **nc_list;
 275
 276                         if ((counter_list = ldap_get_values_len (st->ld, e,
 277                                 "monitorCounter")) != NULL)
 278                         {
 279                                 counter_data = *counter_list[0];
 280                                 counter = atoll (counter_data.bv_val);
 281                         }
 282
 283                         if ((opc_list = ldap_get_values_len (st->ld, e,
 284                                 "monitorOpCompleted")) != NULL)
 285                         {
 286                                 opc_data = *opc_list[0];
 287                                 opc = atoll (opc_data.bv_val);
 288                         }
 289
 290                         if ((opi_list = ldap_get_values_len (st->ld, e,
 291                                 "monitorOpInitiated")) != NULL)
 292                         {
 293                                 opi_data = *opi_list[0];
 294                                 opi = atoll (opi_data.bv_val);
 295                         }
 296
 297                         if ((info_list = ldap_get_values_len (st->ld, e,
 298                                 "monitoredInfo")) != NULL)
 299                         {
 300                                 info_data = *info_list[0];
 301                                 info = atoll (info_data.bv_val);
 302                         }
 303
 304                         if (strcmp (dn, "cn=Total,cn=Connections,cn=Monitor")
 305                                         == 0)
 306                         {
 307                                 cldap_submit_derive ("total_connections", NULL,
 308                                         counter, st);
 309                         }
 310                         else if (strcmp (dn,
 311                                         "cn=Current,cn=Connections,cn=Monitor")
 312                                         == 0)
 313                         {
 314                                 cldap_submit_gauge ("current_connections", NULL,
 315                                         counter, st);
 316                         }
 317                         else if (strcmp (dn,
 318                                         "cn=Operations,cn=Monitor") == 0)
 319                         {
 320                                 cldap_submit_derive ("operations",
 321                                         "completed", opc, st);
 322                                 cldap_submit_derive ("operations",
 323                                         "initiated", opi, st);
 324                         }
 325                         else if (strcmp (dn,
 326                                         "cn=Bind,cn=Operations,cn=Monitor")
 327                                         == 0)
 328                         {
 329                                 cldap_submit_derive ("operations",
 330                                         "bind-completed", opc, st);
 331                                 cldap_submit_derive ("operations",
 332                                         "bind-initiated", opi, st);
 333                         }
 334                         else if (strcmp (dn,
 335                                         "cn=UnBind,cn=Operations,cn=Monitor")
 336                                         == 0)
 337                         {
 338                                 cldap_submit_derive ("operations",
 339                                         "unbind-completed", opc, st);
 340                                 cldap_submit_derive ("operations",
 341                                         "unbind-initiated", opi, st);
 342                         }
 343                         else if (strcmp (dn,
 344                                         "cn=Search,cn=Operations,cn=Monitor")
 345                                         == 0)
 346                         {
 347                                 cldap_submit_derive ("operations",
 348                                         "search-completed", opc, st);
 349                                 cldap_submit_derive ("operations",
 350                                         "search-initiated", opi, st);
 351                         }
 352                         else if (strcmp (dn,
 353                                         "cn=Compare,cn=Operations,cn=Monitor")
 354                                         == 0)
 355                         {
 356                                 cldap_submit_derive ("operations",
 357                                         "compare-completed", opc, st);
 358                                 cldap_submit_derive ("operations",
 359                                         "compare-initiated", opi, st);
 360                         }
 361                         else if (strcmp (dn,
 362                                         "cn=Modify,cn=Operations,cn=Monitor")
 363                                         == 0)
 364                         {
 365                                 cldap_submit_derive ("operations",
 366                                         "modify-completed", opc, st);
 367                                 cldap_submit_derive ("operations",
 368                                         "modify-initiated", opi, st);
 369                         }
 370                         else if (strcmp (dn,
 371                                         "cn=Modrdn,cn=Operations,cn=Monitor")
 372                                         == 0)
 373                         {
 374                                 cldap_submit_derive ("operations",
 375                                         "modrdn-completed", opc, st);
 376                                 cldap_submit_derive ("operations",
 377                                         "modrdn-initiated", opi, st);
 378                         }
 379                         else if (strcmp (dn,
 380                                         "cn=Add,cn=Operations,cn=Monitor")
 381                                         == 0)
 382                         {
 383                                 cldap_submit_derive ("operations",
 384                                         "add-completed", opc, st);
 385                                 cldap_submit_derive ("operations",
 386                                         "add-initiated", opi, st);
 387                         }
 388                         else if (strcmp (dn,
 389                                         "cn=Delete,cn=Operations,cn=Monitor")
 390                                         == 0)
 391                         {
 392                                 cldap_submit_derive ("operations",
 393                                         "delete-completed", opc, st);
 394                                 cldap_submit_derive ("operations",
 395                                         "delete-initiated", opi, st);
 396                         }
 397                         else if (strcmp (dn,
 398                                         "cn=Abandon,cn=Operations,cn=Monitor")
 399                                         == 0)
 400                         {
 401                                 cldap_submit_derive ("operations",
 402                                         "abandon-completed", opc, st);
 403                                 cldap_submit_derive ("operations",
 404                                         "abandon-initiated", opi, st);
 405                         }
 406                         else if (strcmp (dn,
 407                                         "cn=Extended,cn=Operations,cn=Monitor")
 408                                         == 0)
 409                         {
 410                                 cldap_submit_derive ("operations",
 411                                         "extended-completed", opc, st);
 412                                 cldap_submit_derive ("operations",
 413                                         "extended-initiated", opi, st);
 414                         }
 415                         else if ((strncmp (dn, "cn=Database", 11) == 0)
 416                                 && ((nc_list = ldap_get_values_len
 417                                                 (st->ld, e, "namingContexts")) != NULL))
 418                         {
 419                                 nc_data = *nc_list[0];
 420                                 char typeinst[DATA_MAX_NAME_LEN];
 421
 422                                 if ((olmbdb_list = ldap_get_values_len (st->ld, e,
 423                                         "olmBDBEntryCache")) != NULL)
 424                                 {
 425                                         olmbdb_data = *olmbdb_list[0];
 426                                         ssnprintf (typeinst, sizeof (typeinst),
 427                                                 "bdbentrycache-%s", nc_data.bv_val);
 428                                         cldap_submit_gauge ("cache_size", typeinst,
 429                                                 atoll (olmbdb_data.bv_val), st);
 430                                         ldap_value_free_len (olmbdb_list);
 431                                 }
 432
 433                                 if ((olmbdb_list = ldap_get_values_len (st->ld, e,
 434                                         "olmBDBDNCache")) != NULL)
 435                                 {
 436                                         olmbdb_data = *olmbdb_list[0];
 437                                         ssnprintf (typeinst, sizeof (typeinst),
 438                                                 "bdbdncache-%s", nc_data.bv_val);
 439                                         cldap_submit_gauge ("cache_size", typeinst,
 440                                                 atoll (olmbdb_data.bv_val), st);
 441                                         ldap_value_free_len (olmbdb_list);
 442                                 }
 443
 444                                 if ((olmbdb_list = ldap_get_values_len (st->ld, e,
 445                                         "olmBDBIDLCache")) != NULL)
 446                                 {
 447                                         olmbdb_data = *olmbdb_list[0];
 448                                         ssnprintf (typeinst, sizeof (typeinst),
 449                                                 "bdbidlcache-%s", nc_data.bv_val);
 450                                         cldap_submit_gauge ("cache_size", typeinst,
 451                                                 atoll (olmbdb_data.bv_val), st);
 452                                         ldap_value_free_len (olmbdb_list);
 453                                 }
 454
 455                                 ldap_value_free_len (nc_list);
 456                         }
 457                         else if (strcmp (dn,
 458                                         "cn=Bytes,cn=Statistics,cn=Monitor")
 459                                         == 0)
 460                         {
 461                                 cldap_submit_derive ("derive", "statistics-bytes",
 462                                         counter, st);
 463                         }
 464                         else if (strcmp (dn,
 465                                         "cn=PDU,cn=Statistics,cn=Monitor")
 466                                         == 0)
 467                         {
 468                                 cldap_submit_derive ("derive", "statistics-pdu",
 469                                         counter, st);
 470                         }
 471                         else if (strcmp (dn,
 472                                         "cn=Entries,cn=Statistics,cn=Monitor")
 473                                         == 0)
 474                         {
 475                                 cldap_submit_derive ("derive", "statistics-entries",
 476                                         counter, st);
 477                         }
 478                         else if (strcmp (dn,
 479                                         "cn=Referrals,cn=Statistics,cn=Monitor")
 480                                         == 0)
 481                         {
 482                                 cldap_submit_derive ("derive", "statistics-referrals",
 483                                         counter, st);
 484                         }
 485                         else if (strcmp (dn,
 486                                         "cn=Open,cn=Threads,cn=Monitor")
 487                                         == 0)
 488                         {
 489                                 cldap_submit_gauge ("threads", "threads-open",
 490                                         info, st);
 491                         }
 492                         else if (strcmp (dn,
 493                                         "cn=Starting,cn=Threads,cn=Monitor")
 494                                         == 0)
 495                         {
 496                                 cldap_submit_gauge ("threads", "threads-starting",
 497                                         info, st);
 498                         }
 499                         else if (strcmp (dn,
 500                                         "cn=Active,cn=Threads,cn=Monitor")
 501                                         == 0)
 502                         {
 503                                 cldap_submit_gauge ("threads", "threads-active",
 504                                         info, st);
 505                         }
 506                         else if (strcmp (dn,
 507                                         "cn=Pending,cn=Threads,cn=Monitor")
 508                                         == 0)
 509                         {
 510                                 cldap_submit_gauge ("threads", "threads-pending",
 511                                         info, st);
 512                         }
 513                         else if (strcmp (dn,
 514                                         "cn=Backload,cn=Threads,cn=Monitor")
 515                                         == 0)
 516                         {
 517                                 cldap_submit_gauge ("threads", "threads-backload",
 518                                         info, st);
 519                         }
 520                         else if (strcmp (dn,
 521                                         "cn=Read,cn=Waiters,cn=Monitor")
 522                                         == 0)
 523                         {
 524                                 cldap_submit_derive ("derive", "waiters-read",
 525                                         counter, st);
 526                         }
 527                         else if (strcmp (dn,
 528                                         "cn=Write,cn=Waiters,cn=Monitor")
 529                                         == 0)
 530                         {
 531                                 cldap_submit_derive ("derive", "waiters-write",
 532                                         counter, st);
 533                         }
 534
 535                         ldap_value_free_len (counter_list);
 536                         ldap_value_free_len (opc_list);
 537                         ldap_value_free_len (opi_list);
 538                         ldap_value_free_len (info_list);
 539                 }
 540
 541                 ldap_memfree (dn);
 542         }
 543
 544         ldap_msgfree (result);
 545         return (0);
 546 } /* }}} int cldap_read_host */
 547
 548 /* Configuration handling functions {{{
 549  *
 550  * <Plugin ldap>
 551  *   <Instance "plugin_instance1">
 552  *     URL "ldap://localhost"
 553  *     ...
 554  *   </Instance>
 555  * </Plugin>
 556  */
 557
 558 static int cldap_config_add (oconfig_item_t *ci) /* {{{ */
 559 {
 560         cldap_t *st;
 561         int status;
 562
 563         st = calloc (1, sizeof (*st));
 564         if (st == NULL)
 565         {
 566                 ERROR ("openldap plugin: calloc failed.");
 567                 return (-1);
 568         }
 569
 570         status = cf_util_get_string (ci, &st->name);
 571         if (status != 0)
 572         {
 573                 sfree (st);
 574                 return (status);
 575         }
 576
 577         st->starttls = 0;
 578         st->timeout = (long) (CDTIME_T_TO_MS(plugin_get_interval()) / 1000);
 579         st->verifyhost = 1;
 580         st->version = LDAP_VERSION3;
 581
 582         for (int i = 0; i < ci->children_num; i++)
 583         {
 584                 oconfig_item_t *child = ci->children + i;
 585
 586                 if (strcasecmp ("BindDN", child->key) == 0)
 587                         status = cf_util_get_string (child, &st->binddn);
 588                 else if (strcasecmp ("Password", child->key) == 0)
 589                         status = cf_util_get_string (child, &st->password);
 590                 else if (strcasecmp ("CACert", child->key) == 0)
 591                         status = cf_util_get_string (child, &st->cacert);
 592                 else if (strcasecmp ("StartTLS", child->key) == 0)
 593                         status = cf_util_get_boolean (child, &st->starttls);
 594                 else if (strcasecmp ("Timeout", child->key) == 0)
 595                         status = cf_util_get_int (child, &st->timeout);
 596                 else if (strcasecmp ("URL", child->key) == 0)
 597                         status = cf_util_get_string (child, &st->url);
 598                 else if (strcasecmp ("VerifyHost", child->key) == 0)
 599                         status = cf_util_get_boolean (child, &st->verifyhost);
 600                 else if (strcasecmp ("Version", child->key) == 0)
 601                         status = cf_util_get_int (child, &st->version);
 602                 else
 603                 {
 604                         WARNING ("openldap plugin: Option `%s' not allowed here.",
 605                                         child->key);
 606                         status = -1;
 607                 }
 608
 609                 if (status != 0)
 610                         break;
 611         }
 612
 613         /* Check if struct is complete.. */
 614         if ((status == 0) && (st->url == NULL))
 615         {
 616                 ERROR ("openldap plugin: Instance `%s': "
 617                                 "No URL has been configured.",
 618                                 st->name);
 619                 status = -1;
 620         }
 621
 622         /* Check if URL is valid */
 623         if ((status == 0) && (st->url != NULL))
 624         {
 625                 LDAPURLDesc *ludpp;
 626
 627                 if (ldap_url_parse (st->url, &ludpp) != 0)
 628                 {
 629                         ERROR ("openldap plugin: Instance `%s': "
 630                                 "Invalid URL: `%s'",
 631                                 st->name, st->url);
 632                         status = -1;
 633                 }
 634
 635                 if ((status == 0) && (ludpp->lud_host != NULL))
 636                         st->host = strdup (ludpp->lud_host);
 637
 638                 ldap_free_urldesc (ludpp);
 639         }
 640
 641         if (status == 0)
 642         {
 643                 cldap_t **temp;
 644
 645                 temp = (cldap_t **) realloc (databases,
 646                         sizeof (*databases) * (databases_num + 1));
 647
 648                 if (temp == NULL)
 649                 {
 650                         ERROR ("openldap plugin: realloc failed");
 651                         status = -1;
 652                 }
 653                 else
 654                 {
 655                         char callback_name[3*DATA_MAX_NAME_LEN] = { 0 };
 656
 657                         databases = temp;
 658                         databases[databases_num] = st;
 659                         databases_num++;
 660
 661                         ssnprintf (callback_name, sizeof (callback_name),
 662                                         "openldap/%s/%s",
 663                                         (st->host != NULL) ? st->host : hostname_g,
 664                                         (st->name != NULL) ? st->name : "default");
 665
 666                         status = plugin_register_complex_read (/* group = */ NULL,
 667                                         /* name      = */ callback_name,
 668                                         /* callback  = */ cldap_read_host,
 669                                         /* interval  = */ 0,
 670                                         &(user_data_t) {
 671                                                 .data = st,
 672                                         });
 673                 }
 674         }
 675
 676         if (status != 0)
 677         {
 678                 cldap_free (st);
 679                 return (-1);
 680         }
 681
 682         return (0);
 683 } /* }}} int cldap_config_add */
 684
 685 static int cldap_config (oconfig_item_t *ci) /* {{{ */
 686 {
 687         int status = 0;
 688
 689         for (int i = 0; i < ci->children_num; i++)
 690         {
 691                 oconfig_item_t *child = ci->children + i;
 692
 693                 if (strcasecmp ("Instance", child->key) == 0)
 694                         cldap_config_add (child);
 695                 else
 696                         WARNING ("openldap plugin: The configuration option "
 697                                         "\"%s\" is not allowed here. Did you "
 698                                         "forget to add an <Instance /> block "
 699                                         "around the configuration?",
 700                                         child->key);
 701         } /* for (ci->children) */
 702
 703         return (status);
 704 } /* }}} int cldap_config */
 705
 706 /* }}} End of configuration handling functions */
 707
 708 static int cldap_init (void) /* {{{ */
 709 {
 710         /* Initialize LDAP library while still single-threaded as recommended in
 711          * ldap_initialize(3) */
 712         int debug_level;
 713         ldap_get_option (NULL, LDAP_OPT_DEBUG_LEVEL, &debug_level);
 714         return (0);
 715 } /* }}} int cldap_init */
 716
 717 static int cldap_shutdown (void) /* {{{ */
 718 {
 719         for (size_t i = 0; i < databases_num; i++)
 720                 if (databases[i]->ld != NULL)
 721                         ldap_unbind_ext_s (databases[i]->ld, NULL, NULL);
 722         sfree (databases);
 723         databases_num = 0;
 724
 725         return (0);
 726 } /* }}} int cldap_shutdown */
 727
 728 void module_register (void) /* {{{ */
 729 {
 730         plugin_register_complex_config ("openldap", cldap_config);
 731         plugin_register_init ("openldap", cldap_init);
 732         plugin_register_shutdown ("openldap", cldap_shutdown);
 733 } /* }}} void module_register */
 734
 735 #if defined(__APPLE__)
 736 #pragma clang diagnostic pop
 737 #endif