git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /* backend.c - routines for dealing with back-end databases */
   7
   8
   9 #include "portable.h"
  10
  11 #include <stdio.h>
  12
  13 #include <ac/string.h>
  14 #include <ac/socket.h>
  15 #include <sys/stat.h>
  16
  17 #include "slap.h"
  18 #include "lutil.h"
  19 #include "lber_pvt.h"
  20
  21 #include "ldap_rq.h"
  22
  23 #ifdef LDAP_SLAPI
  24 #include "slapi.h"
  25 #endif
  26
  27 /*
  28  * If a module is configured as dynamic, its header should not
  29  * get included into slapd. While this is a general rule and does
  30  * not have much of an effect in UNIX, this rule should be adhered
  31  * to for Windows, where dynamic object code should not be implicitly
  32  * imported into slapd without appropriate __declspec(dllimport) directives.
  33  */
  34
  35 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  36 #include "back-bdb/external.h"
  37 #endif
  38 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  39 #include "back-dnssrv/external.h"
  40 #endif
  41 #if defined(SLAPD_HDB) && !defined(SLAPD_HDB_DYNAMIC)
  42 #include "back-hdb/external.h"
  43 #endif
  44 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  45 #include "back-ldap/external.h"
  46 #endif
  47 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  48 #include "back-ldbm/external.h"
  49 #endif
  50 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  51 #include "back-meta/external.h"
  52 #endif
  53 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  54 #include "back-monitor/external.h"
  55 #endif
  56 #if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
  57 #include "back-null/external.h"
  58 #endif
  59 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  60 #include "back-passwd/external.h"
  61 #endif
  62 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  63 #include "back-perl/external.h"
  64 #endif
  65 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  66 #include "back-shell/external.h"
  67 #endif
  68 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  69 #include "back-tcl/external.h"
  70 #endif
  71 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  72 #include "back-sql/external.h"
  73 #endif
  74 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
  75 #include "private/external.h"
  76 #endif
  77
  78 static BackendInfo binfo[] = {
  79 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  80         {"bdb", bdb_initialize},
  81 #endif
  82 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  83         {"dnssrv",      dnssrv_back_initialize},
  84 #endif
  85 #if defined(SLAPD_HDB) && !defined(SLAPD_HDB_DYNAMIC)
  86         {"hdb", hdb_initialize},
  87 #endif
  88 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  89         {"ldap",        ldap_back_initialize},
  90 #endif
  91 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  92         {"ldbm",        ldbm_back_initialize},
  93 #endif
  94 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  95         {"meta",        meta_back_initialize},
  96 #endif
  97 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  98         {"monitor",     monitor_back_initialize},
  99 #endif
 100 #if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
 101         {"null",        null_back_initialize},
 102 #endif
 103 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
 104         {"passwd",      passwd_back_initialize},
 105 #endif
 106 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
 107         {"perl",        perl_back_initialize},
 108 #endif
 109 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
 110         {"shell",       shell_back_initialize},
 111 #endif
 112 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
 113         {"tcl",         tcl_back_initialize},
 114 #endif
 115 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
 116         {"sql",         sql_back_initialize},
 117 #endif
 118         /* for any private backend */
 119 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
 120         {"private",     private_back_initialize},
 121 #endif
 122         {NULL}
 123 };
 124
 125 int                     nBackendInfo = 0;
 126 BackendInfo     *backendInfo = NULL;
 127
 128 int                     nBackendDB = 0;
 129 BackendDB       *backendDB = NULL;
 130
 131 ldap_pvt_thread_pool_t  syncrepl_pool;
 132 int                     syncrepl_pool_max = SLAP_MAX_SYNCREPL_THREADS;
 133
 134 int backend_init(void)
 135 {
 136         int rc = -1;
 137
 138         ldap_pvt_thread_pool_init( &syncrepl_pool, syncrepl_pool_max, 0 );
 139
 140         if((nBackendInfo != 0) || (backendInfo != NULL)) {
 141                 /* already initialized */
 142 #ifdef NEW_LOGGING
 143                 LDAP_LOG( BACKEND, ERR,
 144                         "backend_init:  backend already initialized\n", 0, 0, 0 );
 145 #else
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_init: already initialized.\n", 0, 0, 0 );
 148 #endif
 149                 return -1;
 150         }
 151
 152         for( ;
 153                 binfo[nBackendInfo].bi_type != NULL;
 154                 nBackendInfo++ )
 155         {
 156                 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 157
 158                 if(rc != 0) {
 159 #ifdef NEW_LOGGING
 160                         LDAP_LOG( BACKEND, INFO,
 161                                 "backend_init:  initialized for type \"%s\"\n",
 162                                 binfo[nBackendInfo].bi_type, 0, 0 );
 163 #else
 164                         Debug( LDAP_DEBUG_ANY,
 165                                 "backend_init: initialized for type \"%s\"\n",
 166                                 binfo[nBackendInfo].bi_type, 0, 0 );
 167 #endif
 168                         /* destroy those we've already inited */
 169                         for( nBackendInfo--;
 170                                 nBackendInfo >= 0 ;
 171                                 nBackendInfo-- )
 172                         {
 173                                 if ( binfo[nBackendInfo].bi_destroy ) {
 174                                         binfo[nBackendInfo].bi_destroy(
 175                                                 &binfo[nBackendInfo] );
 176                                 }
 177                         }
 178                         return rc;
 179                 }
 180         }
 181
 182         if ( nBackendInfo > 0) {
 183                 backendInfo = binfo;
 184                 return 0;
 185         }
 186
 187 #ifdef SLAPD_MODULES
 188         return 0;
 189 #else
 190
 191 #ifdef NEW_LOGGING
 192         LDAP_LOG( BACKEND, ERR, "backend_init: failed\n", 0, 0, 0 );
 193 #else
 194         Debug( LDAP_DEBUG_ANY,
 195                 "backend_init: failed\n",
 196                 0, 0, 0 );
 197 #endif
 198
 199         return rc;
 200 #endif /* SLAPD_MODULES */
 201 }
 202
 203 int backend_add(BackendInfo *aBackendInfo)
 204 {
 205    int rc = 0;
 206
 207    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 208 #ifdef NEW_LOGGING
 209         LDAP_LOG( BACKEND, ERR,
 210                   "backend_add:  initialization for type \"%s\" failed\n",
 211                   aBackendInfo->bi_type, 0, 0 );
 212 #else
 213       Debug( LDAP_DEBUG_ANY,
 214              "backend_add: initialization for type \"%s\" failed\n",
 215              aBackendInfo->bi_type, 0, 0 );
 216 #endif
 217       return rc;
 218    }
 219
 220    /* now add the backend type to the Backend Info List */
 221    {
 222       BackendInfo *newBackendInfo = 0;
 223
 224       /* if backendInfo == binfo no deallocation of old backendInfo */
 225       if (backendInfo == binfo) {
 226          newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 227          AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) *
 228                 nBackendInfo);
 229       } else {
 230          newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
 231                                      (nBackendInfo + 1));
 232       }
 233       AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 234              sizeof(BackendInfo));
 235       backendInfo = newBackendInfo;
 236       nBackendInfo++;
 237
 238       return 0;
 239    }
 240 }
 241
 242 int backend_startup(Backend *be)
 243 {
 244         int i;
 245         int rc = 0;
 246
 247         init_syncrepl();
 248
 249         if( ! ( nBackendDB > 0 ) ) {
 250                 /* no databases */
 251 #ifdef NEW_LOGGING
 252                 LDAP_LOG( BACKEND, INFO,
 253                         "backend_startup: %d databases to startup. \n", nBackendDB, 0, 0 );
 254 #else
 255                 Debug( LDAP_DEBUG_ANY,
 256                         "backend_startup: %d databases to startup.\n",
 257                         nBackendDB, 0, 0 );
 258 #endif
 259                 return 1;
 260         }
 261
 262         if(be != NULL) {
 263                 /* startup a specific backend database */
 264
 265                 LDAP_TAILQ_INIT( &be->be_pending_csn_list );
 266
 267 #ifdef NEW_LOGGING
 268                 LDAP_LOG( BACKEND, DETAIL1, "backend_startup:  starting \"%s\"\n",
 269                            be->be_suffix[0].bv_val, 0, 0 );
 270 #else
 271                 Debug( LDAP_DEBUG_TRACE,
 272                         "backend_startup: starting \"%s\"\n",
 273                         be->be_suffix[0].bv_val, 0, 0 );
 274 #endif
 275
 276                 if ( be->bd_info->bi_open ) {
 277                         rc = be->bd_info->bi_open( be->bd_info );
 278                         if ( rc != 0 ) {
 279 #ifdef NEW_LOGGING
 280                                 LDAP_LOG( BACKEND, CRIT, "backend_startup: bi_open failed!\n", 0, 0, 0 );
 281 #else
 282                                 Debug( LDAP_DEBUG_ANY,
 283                                         "backend_startup: bi_open failed!\n",
 284                                         0, 0, 0 );
 285 #endif
 286
 287                                 return rc;
 288                         }
 289                 }
 290
 291                 if ( be->bd_info->bi_db_open ) {
 292                         rc = be->bd_info->bi_db_open( be );
 293                         if ( rc != 0 ) {
 294 #ifdef NEW_LOGGING
 295                                 LDAP_LOG( BACKEND, CRIT,
 296                                         "backend_startup: bi_db_open failed! (%d)\n", rc, 0, 0 );
 297 #else
 298                                 Debug( LDAP_DEBUG_ANY,
 299                                         "backend_startup: bi_db_open failed! (%d)\n",
 300                                         rc, 0, 0 );
 301 #endif
 302                                 return rc;
 303                         }
 304                 }
 305
 306                 return rc;
 307         }
 308
 309         /* open each backend type */
 310         for( i = 0; i < nBackendInfo; i++ ) {
 311                 if( backendInfo[i].bi_nDB == 0) {
 312                         /* no database of this type, don't open */
 313                         continue;
 314                 }
 315
 316                 if( backendInfo[i].bi_open ) {
 317                         rc = backendInfo[i].bi_open(
 318                                 &backendInfo[i] );
 319                         if ( rc != 0 ) {
 320 #ifdef NEW_LOGGING
 321                                 LDAP_LOG( BACKEND, CRIT,
 322                                         "backend_startup: bi_open %d failed!\n", i, 0, 0 );
 323 #else
 324                                 Debug( LDAP_DEBUG_ANY,
 325                                         "backend_startup: bi_open %d failed!\n",
 326                                         i, 0, 0 );
 327 #endif
 328                                 return rc;
 329                         }
 330                 }
 331         }
 332
 333         ldap_pvt_thread_mutex_init( &syncrepl_rq.rq_mutex );
 334         LDAP_STAILQ_INIT( &syncrepl_rq.task_list );
 335         LDAP_STAILQ_INIT( &syncrepl_rq.run_list );
 336
 337         /* open each backend database */
 338         for( i = 0; i < nBackendDB; i++ ) {
 339                 if ( backendDB[i].be_update_ndn.bv_val && (
 340                         !backendDB[i].be_update_refs &&
 341                         !backendDB[i].syncinfo &&
 342                         !default_referral ) ) {
 343 #ifdef NEW_LOGGING
 344                         LDAP_LOG( BACKEND, CRIT,
 345                                 "backend_startup: slave \"%s\" updateref missing\n",
 346                                 backendDB[i].be_suffix[0].bv_val, 0, 0 );
 347
 348 #else
 349                         Debug( LDAP_DEBUG_ANY,
 350                                 "backend_startup: slave \"%s\" updateref missing\n",
 351                                 backendDB[i].be_suffix[0].bv_val, 0, 0 );
 352 #endif
 353                         return -1;
 354                 }
 355
 356                 /* append global access controls */
 357                 acl_append( &backendDB[i].be_acl, global_acl );
 358
 359                 LDAP_TAILQ_INIT( &backendDB[i].be_pending_csn_list );
 360
 361                 if ( backendDB[i].bd_info->bi_db_open ) {
 362                         rc = backendDB[i].bd_info->bi_db_open(
 363                                 &backendDB[i] );
 364                         if ( rc != 0 ) {
 365 #ifdef NEW_LOGGING
 366                                 LDAP_LOG( BACKEND, CRIT,
 367                                         "backend_startup: bi_db_open(%d) failed! (%d)\n", i, rc, 0 );
 368 #else
 369                                 Debug( LDAP_DEBUG_ANY,
 370                                         "backend_startup: bi_db_open(%d) failed! (%d)\n",
 371                                         i, rc, 0 );
 372 #endif
 373                                 return rc;
 374                         }
 375                 }
 376
 377                 if ( backendDB[i].syncinfo != NULL ) {
 378                         syncinfo_t *si = ( syncinfo_t * ) backendDB[i].syncinfo;
 379                         si->be = &backendDB[i];
 380                         ldap_pvt_thread_mutex_lock( &syncrepl_rq.rq_mutex );
 381                         ldap_pvt_runqueue_insert( &syncrepl_rq, si->interval,
 382                                                         do_syncrepl, (void *) backendDB[i].syncinfo );
 383                         ldap_pvt_thread_mutex_unlock( &syncrepl_rq.rq_mutex );
 384                 }
 385         }
 386
 387         return rc;
 388 }
 389
 390 int backend_num( Backend *be )
 391 {
 392         int i;
 393
 394         if( be == NULL ) return -1;
 395
 396         for( i = 0; i < nBackendDB; i++ ) {
 397                 if( be == &backendDB[i] ) return i;
 398         }
 399         return -1;
 400 }
 401
 402 int backend_shutdown( Backend *be )
 403 {
 404         int i;
 405         int rc = 0;
 406
 407         if( be != NULL ) {
 408                 /* shutdown a specific backend database */
 409
 410                 if ( be->bd_info->bi_nDB == 0 ) {
 411                         /* no database of this type, we never opened it */
 412                         return 0;
 413                 }
 414
 415                 if ( be->bd_info->bi_db_close ) {
 416                         be->bd_info->bi_db_close( be );
 417                 }
 418
 419                 if( be->bd_info->bi_close ) {
 420                         be->bd_info->bi_close( be->bd_info );
 421                 }
 422
 423                 return 0;
 424         }
 425
 426         /* close each backend database */
 427         for( i = 0; i < nBackendDB; i++ ) {
 428                 if ( backendDB[i].bd_info->bi_db_close ) {
 429                         backendDB[i].bd_info->bi_db_close(
 430                                 &backendDB[i] );
 431                 }
 432
 433                 if(rc != 0) {
 434 #ifdef NEW_LOGGING
 435                         LDAP_LOG( BACKEND, NOTICE,
 436                                 "backend_shutdown: bi_close %s failed!\n",
 437                                 backendDB[i].be_type, 0, 0 );
 438 #else
 439                         Debug( LDAP_DEBUG_ANY,
 440                                 "backend_close: bi_close %s failed!\n",
 441                                 backendDB[i].be_type, 0, 0 );
 442 #endif
 443                 }
 444         }
 445
 446         /* close each backend type */
 447         for( i = 0; i < nBackendInfo; i++ ) {
 448                 if( backendInfo[i].bi_nDB == 0 ) {
 449                         /* no database of this type */
 450                         continue;
 451                 }
 452
 453                 if( backendInfo[i].bi_close ) {
 454                         backendInfo[i].bi_close(
 455                                 &backendInfo[i] );
 456                 }
 457         }
 458
 459         return 0;
 460 }
 461
 462 int backend_destroy(void)
 463 {
 464         int i;
 465         BackendDB *bd;
 466
 467         ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
 468
 469         /* destroy each backend database */
 470         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 471                 if ( bd->bd_info->bi_db_destroy ) {
 472                         bd->bd_info->bi_db_destroy( bd );
 473                 }
 474                 ber_bvarray_free( bd->be_suffix );
 475                 ber_bvarray_free( bd->be_nsuffix );
 476                 if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 477                 if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 478                 if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 479                 acl_destroy( bd->be_acl, global_acl );
 480         }
 481         free( backendDB );
 482
 483         /* destroy each backend type */
 484         for( i = 0; i < nBackendInfo; i++ ) {
 485                 if( backendInfo[i].bi_destroy ) {
 486                         backendInfo[i].bi_destroy(
 487                                 &backendInfo[i] );
 488                 }
 489         }
 490
 491 #ifdef SLAPD_MODULES
 492         if (backendInfo != binfo) {
 493            free(backendInfo);
 494         }
 495 #endif /* SLAPD_MODULES */
 496
 497         nBackendInfo = 0;
 498         backendInfo = NULL;
 499
 500         return 0;
 501 }
 502
 503 BackendInfo* backend_info(const char *type)
 504 {
 505         int i;
 506
 507         /* search for the backend type */
 508         for( i = 0; i < nBackendInfo; i++ ) {
 509                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 510                         return &backendInfo[i];
 511                 }
 512         }
 513
 514         return NULL;
 515 }
 516
 517
 518 BackendDB *
 519 backend_db_init(
 520     const char  *type
 521 )
 522 {
 523         Backend *be;
 524         BackendInfo *bi = backend_info(type);
 525         int     rc = 0;
 526
 527         if( bi == NULL ) {
 528                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 529                 return NULL;
 530         }
 531
 532         backendDB = (BackendDB *) ch_realloc(
 533                         (char *) backendDB,
 534                     (nBackendDB + 1) * sizeof(Backend) );
 535
 536         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 537
 538         be = &backends[nbackends++];
 539
 540         be->bd_info = bi;
 541         be->be_def_limit = deflimit;
 542         be->be_dfltaccess = global_default_access;
 543
 544         be->be_restrictops = global_restrictops;
 545         be->be_requires = global_requires;
 546         be->be_ssf_set = global_ssf_set;
 547
 548         be->be_context_csn.bv_len = 0;
 549         be->be_context_csn.bv_val = NULL;
 550         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 551         ldap_pvt_thread_mutex_init( &be->be_context_csn_mutex );
 552
 553         be->syncinfo = NULL;
 554
 555         /* assign a default depth limit for alias deref */
 556         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 557
 558         if(bi->bi_db_init) {
 559                 rc = bi->bi_db_init( be );
 560         }
 561
 562         if(rc != 0) {
 563                 fprintf( stderr, "database init failed (%s)\n", type );
 564                 nbackends--;
 565                 return NULL;
 566         }
 567
 568         bi->bi_nDB++;
 569         return( be );
 570 }
 571
 572 void
 573 be_db_close( void )
 574 {
 575         int     i;
 576
 577         for ( i = 0; i < nbackends; i++ ) {
 578                 if ( backends[i].bd_info->bi_db_close ) {
 579                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 580                 }
 581         }
 582 }
 583
 584 Backend *
 585 select_backend(
 586         struct berval * dn,
 587         int manageDSAit,
 588         int noSubs )
 589 {
 590         int     i, j;
 591         ber_len_t len, dnlen = dn->bv_len;
 592         Backend *be = NULL;
 593
 594         for ( i = 0; i < nbackends; i++ ) {
 595                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 596                     backends[i].be_nsuffix[j].bv_val != NULL; j++ )
 597                 {
 598                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 599                                 && noSubs )
 600                         {
 601                                 continue;
 602                         }
 603
 604                         len = backends[i].be_nsuffix[j].bv_len;
 605
 606                         if ( len > dnlen ) {
 607                                 /* suffix is longer than DN */
 608                                 continue;
 609                         }
 610
 611                         /*
 612                          * input DN is normalized, so the separator check
 613                          * need not look at escaping
 614                          */
 615                         if ( len && len < dnlen &&
 616                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 617                         {
 618                                 continue;
 619                         }
 620
 621                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 622                                 &dn->bv_val[dnlen-len] ) == 0 )
 623                         {
 624                                 if( be == NULL ) {
 625                                         be = &backends[i];
 626
 627                                         if( manageDSAit && len == dnlen ) {
 628                                                 continue;
 629                                         }
 630                                 } else {
 631                                         be = &backends[i];
 632                                 }
 633                                 return be;
 634                         }
 635                 }
 636         }
 637
 638         return be;
 639 }
 640
 641 int
 642 be_issuffix(
 643     Backend     *be,
 644     struct berval       *bvsuffix
 645 )
 646 {
 647         int     i;
 648
 649         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL; i++ ) {
 650                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 651                         return( 1 );
 652                 }
 653         }
 654
 655         return( 0 );
 656 }
 657
 658 int
 659 be_isroot( Backend *be, struct berval *ndn )
 660 {
 661         if ( !ndn->bv_len ) {
 662                 return( 0 );
 663         }
 664
 665         if ( !be->be_rootndn.bv_len ) {
 666                 return( 0 );
 667         }
 668
 669         return dn_match( &be->be_rootndn, ndn );
 670 }
 671
 672 int
 673 be_isupdate( Backend *be, struct berval *ndn )
 674 {
 675         if ( !ndn->bv_len ) {
 676                 return( 0 );
 677         }
 678
 679         if ( !be->be_update_ndn.bv_len ) {
 680                 return( 0 );
 681         }
 682
 683         return dn_match( &be->be_update_ndn, ndn );
 684 }
 685
 686 struct berval *
 687 be_root_dn( Backend *be )
 688 {
 689         return &be->be_rootdn;
 690 }
 691
 692 int
 693 be_isroot_pw( Operation *op )
 694 {
 695         int result;
 696         char *errmsg;
 697
 698         if ( ! be_isroot( op->o_bd, &op->o_req_ndn ) ) {
 699                 return 0;
 700         }
 701
 702         if( op->o_bd->be_rootpw.bv_len == 0 ) {
 703                 return 0;
 704         }
 705
 706 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 707         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 708 #ifdef SLAPD_SPASSWD
 709         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 710 #endif
 711 #endif
 712
 713         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 714
 715 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 716 #ifdef SLAPD_SPASSWD
 717         lutil_passwd_sasl_conn = NULL;
 718 #endif
 719         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 720 #endif
 721
 722         return result == 0;
 723 }
 724
 725 int
 726 be_entry_release_rw(
 727         Operation *op,
 728         Entry *e,
 729         int rw )
 730 {
 731         if ( op->o_bd->be_release ) {
 732                 /* free and release entry from backend */
 733                 return op->o_bd->be_release( op, e, rw );
 734         } else {
 735                 /* free entry */
 736                 entry_free( e );
 737                 return 0;
 738         }
 739 }
 740
 741 int
 742 backend_unbind( Operation *op, SlapReply *rs )
 743 {
 744         int             i;
 745 #if defined( LDAP_SLAPI )
 746         Slapi_PBlock *pb = op->o_pb;
 747
 748         int     rc;
 749         slapi_x_pblock_set_operation( pb, op );
 750 #endif /* defined( LDAP_SLAPI ) */
 751
 752         for ( i = 0; i < nbackends; i++ ) {
 753 #if defined( LDAP_SLAPI )
 754                 slapi_pblock_set( pb, SLAPI_BACKEND, (void *)&backends[i] );
 755                 rc = doPluginFNs( &backends[i], SLAPI_PLUGIN_PRE_UNBIND_FN,
 756                                 (Slapi_PBlock *)pb );
 757                 if ( rc < 0 ) {
 758                         /*
 759                          * A preoperation plugin failure will abort the
 760                          * entire operation.
 761                          */
 762 #ifdef NEW_LOGGING
 763                         LDAP_LOG( OPERATION, INFO, "do_bind: Unbind preoperation plugin "
 764                                         "failed\n", 0, 0, 0);
 765 #else
 766                         Debug(LDAP_DEBUG_TRACE, "do_bind: Unbind preoperation plugin "
 767                                         "failed.\n", 0, 0, 0);
 768 #endif
 769                         return 0;
 770                 }
 771 #endif /* defined( LDAP_SLAPI ) */
 772
 773                 if ( backends[i].be_unbind ) {
 774                         op->o_bd = &backends[i];
 775                         (*backends[i].be_unbind)( op, rs );
 776                 }
 777
 778 #if defined( LDAP_SLAPI )
 779                 if ( doPluginFNs( &backends[i], SLAPI_PLUGIN_POST_UNBIND_FN,
 780                                 (Slapi_PBlock *)pb ) < 0 ) {
 781 #ifdef NEW_LOGGING
 782                         LDAP_LOG( OPERATION, INFO, "do_unbind: Unbind postoperation plugins "
 783                                         "failed\n", 0, 0, 0);
 784 #else
 785                         Debug(LDAP_DEBUG_TRACE, "do_unbind: Unbind postoperation plugins "
 786                                         "failed.\n", 0, 0, 0);
 787 #endif
 788                 }
 789 #endif /* defined( LDAP_SLAPI ) */
 790         }
 791
 792         return 0;
 793 }
 794
 795 int
 796 backend_connection_init(
 797         Connection   *conn
 798 )
 799 {
 800         int     i;
 801
 802         for ( i = 0; i < nbackends; i++ ) {
 803                 if ( backends[i].be_connection_init ) {
 804                         (*backends[i].be_connection_init)( &backends[i], conn);
 805                 }
 806         }
 807
 808         return 0;
 809 }
 810
 811 int
 812 backend_connection_destroy(
 813         Connection   *conn
 814 )
 815 {
 816         int     i;
 817
 818         for ( i = 0; i < nbackends; i++ ) {
 819                 if ( backends[i].be_connection_destroy ) {
 820                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 821                 }
 822         }
 823
 824         return 0;
 825 }
 826
 827 static int
 828 backend_check_controls(
 829         Operation *op,
 830         SlapReply *rs )
 831 {
 832         LDAPControl **ctrls = op->o_ctrls;
 833         rs->sr_err = LDAP_SUCCESS;
 834
 835         if( ctrls ) {
 836                 for( ; *ctrls != NULL ; ctrls++ ) {
 837                         if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
 838                                 op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
 839                         {
 840                                 rs->sr_text = "control unavailable in context";
 841                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 842                                 break;
 843                         }
 844                 }
 845         }
 846
 847         return rs->sr_err;
 848 }
 849
 850 int
 851 backend_check_restrictions(
 852         Operation *op,
 853         SlapReply *rs,
 854         struct berval *opdata )
 855 {
 856         slap_mask_t restrictops;
 857         slap_mask_t requires;
 858         slap_mask_t opflag;
 859         slap_ssf_set_t *ssf;
 860         int updateop = 0;
 861         int starttls = 0;
 862         int session = 0;
 863
 864         if( op->o_bd ) {
 865                 if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
 866                         return rs->sr_err;
 867                 }
 868
 869                 restrictops = op->o_bd->be_restrictops;
 870                 requires = op->o_bd->be_requires;
 871                 ssf = &op->o_bd->be_ssf_set;
 872
 873         } else {
 874                 restrictops = global_restrictops;
 875                 requires = global_requires;
 876                 ssf = &global_ssf_set;
 877         }
 878
 879         switch( op->o_tag ) {
 880         case LDAP_REQ_ADD:
 881                 opflag = SLAP_RESTRICT_OP_ADD;
 882                 updateop++;
 883                 break;
 884         case LDAP_REQ_BIND:
 885                 opflag = SLAP_RESTRICT_OP_BIND;
 886                 session++;
 887                 break;
 888         case LDAP_REQ_COMPARE:
 889                 opflag = SLAP_RESTRICT_OP_COMPARE;
 890                 break;
 891         case LDAP_REQ_DELETE:
 892                 updateop++;
 893                 opflag = SLAP_RESTRICT_OP_DELETE;
 894                 break;
 895         case LDAP_REQ_EXTENDED:
 896                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 897
 898                 if( !opdata ) {
 899                         /* treat unspecified as a modify */
 900                         opflag = SLAP_RESTRICT_OP_MODIFY;
 901                         updateop++;
 902                         break;
 903                 }
 904
 905                 {
 906                         if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 907                                 session++;
 908                                 starttls++;
 909                                 break;
 910                         }
 911                 }
 912
 913                 {
 914                         if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 915                                 break;
 916                         }
 917                 }
 918
 919 #ifdef LDAP_EXOP_X_CANCEL
 920                 {
 921                         if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 922                                 break;
 923                         }
 924                 }
 925 #endif
 926
 927                 /* treat everything else as a modify */
 928                 opflag = SLAP_RESTRICT_OP_MODIFY;
 929                 updateop++;
 930                 break;
 931
 932         case LDAP_REQ_MODIFY:
 933                 updateop++;
 934                 opflag = SLAP_RESTRICT_OP_MODIFY;
 935                 break;
 936         case LDAP_REQ_RENAME:
 937                 updateop++;
 938                 opflag = SLAP_RESTRICT_OP_RENAME;
 939                 break;
 940         case LDAP_REQ_SEARCH:
 941                 opflag = SLAP_RESTRICT_OP_SEARCH;
 942                 break;
 943         case LDAP_REQ_UNBIND:
 944                 session++;
 945                 opflag = 0;
 946                 break;
 947         default:
 948                 rs->sr_text = "restrict operations internal error";
 949                 rs->sr_err = LDAP_OTHER;
 950                 return rs->sr_err;
 951         }
 952
 953         if ( !starttls ) {
 954                 /* these checks don't apply to StartTLS */
 955
 956                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 957                 if( op->o_transport_ssf < ssf->sss_transport ) {
 958                         rs->sr_text = "transport confidentiality required";
 959                         return rs->sr_err;
 960                 }
 961
 962                 if( op->o_tls_ssf < ssf->sss_tls ) {
 963                         rs->sr_text = "TLS confidentiality required";
 964                         return rs->sr_err;
 965                 }
 966
 967
 968                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 969                         /* simple bind specific check */
 970                         if( op->o_ssf < ssf->sss_simple_bind ) {
 971                                 rs->sr_text = "confidentiality required";
 972                                 return rs->sr_err;
 973                         }
 974                 }
 975
 976                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 977                         /* these checks don't apply to SASL bind */
 978
 979                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 980                                 rs->sr_text = "SASL confidentiality required";
 981                                 return rs->sr_err;
 982                         }
 983
 984                         if( op->o_ssf < ssf->sss_ssf ) {
 985                                 rs->sr_text = "confidentiality required";
 986                                 return rs->sr_err;
 987                         }
 988                 }
 989
 990                 if( updateop ) {
 991                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 992                                 rs->sr_text = "transport update confidentiality required";
 993                                 return rs->sr_err;
 994                         }
 995
 996                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 997                                 rs->sr_text = "TLS update confidentiality required";
 998                                 return rs->sr_err;
 999                         }
1000
1001                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1002                                 rs->sr_text = "SASL update confidentiality required";
1003                                 return rs->sr_err;
1004                         }
1005
1006                         if( op->o_ssf < ssf->sss_update_ssf ) {
1007                                 rs->sr_text = "update confidentiality required";
1008                                 return rs->sr_err;
1009                         }
1010
1011                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1012                                 op->o_ndn.bv_len == 0 )
1013                         {
1014                                 rs->sr_text = "modifications require authentication";
1015                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1016                                 return rs->sr_err;
1017                         }
1018
1019 #ifdef SLAP_X_LISTENER_MOD
1020                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( op->o_ndn.bv_len > 0 ? S_IWUSR : S_IWOTH ) ) ) {
1021                                 /* no "w" mode means readonly */
1022                                 rs->sr_text = "modifications not allowed on this listener";
1023                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1024                                 return rs->sr_err;
1025                         }
1026 #endif /* SLAP_X_LISTENER_MOD */
1027                 }
1028         }
1029
1030         if ( !session ) {
1031                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1032
1033                 if( requires & SLAP_REQUIRE_STRONG ) {
1034                         /* should check mechanism */
1035                         if( ( op->o_transport_ssf < ssf->sss_transport
1036                                 && op->o_authmech.bv_len == 0 ) || op->o_dn.bv_len == 0 )
1037                         {
1038                                 rs->sr_text = "strong authentication required";
1039                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1040                                 return rs->sr_err;
1041                         }
1042                 }
1043
1044                 if( requires & SLAP_REQUIRE_SASL ) {
1045                         if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 ) {
1046                                 rs->sr_text = "SASL authentication required";
1047                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1048                                 return rs->sr_err;
1049                         }
1050                 }
1051
1052                 if( requires & SLAP_REQUIRE_AUTHC ) {
1053                         if( op->o_dn.bv_len == 0 ) {
1054                                 rs->sr_text = "authentication required";
1055                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1056                                 return rs->sr_err;
1057                         }
1058                 }
1059
1060                 if( requires & SLAP_REQUIRE_BIND ) {
1061                         int version;
1062                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1063                         version = op->o_conn->c_protocol;
1064                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1065
1066                         if( !version ) {
1067                                 /* no bind has occurred */
1068                                 rs->sr_text = "BIND required";
1069                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1070                                 return rs->sr_err;
1071                         }
1072                 }
1073
1074                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1075                         if( op->o_protocol < LDAP_VERSION3 ) {
1076                                 /* no bind has occurred */
1077                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1078                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1079                                 return rs->sr_err;
1080                         }
1081                 }
1082
1083 #ifdef SLAP_X_LISTENER_MOD
1084                 if ( !starttls && op->o_dn.bv_len == 0 ) {
1085                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & S_IXOTH ) ) {
1086                                 /* no "x" mode means bind required */
1087                                 rs->sr_text = "bind required on this listener";
1088                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1089                                 return rs->sr_err;
1090                         }
1091                 }
1092
1093                 if ( !starttls && !updateop ) {
1094                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( op->o_dn.bv_len > 0 ? S_IRUSR : S_IROTH ) ) ) {
1095                                 /* no "r" mode means no read */
1096                                 rs->sr_text = "read not allowed on this listener";
1097                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1098                                 return rs->sr_err;
1099                         }
1100                 }
1101 #endif /* SLAP_X_LISTENER_MOD */
1102
1103         }
1104
1105         if( restrictops & opflag ) {
1106                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
1107                         rs->sr_text = "read operations restricted";
1108                 } else {
1109                         rs->sr_text = "operation restricted";
1110                 }
1111                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1112                 return rs->sr_err;
1113         }
1114
1115         rs->sr_err = LDAP_SUCCESS;
1116         return rs->sr_err;
1117 }
1118
1119 int backend_check_referrals( Operation *op, SlapReply *rs )
1120 {
1121         rs->sr_err = LDAP_SUCCESS;
1122
1123         if( op->o_bd->be_chk_referrals ) {
1124                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1125
1126                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1127                         send_ldap_result( op, rs );
1128                 }
1129         }
1130
1131         return rs->sr_err;
1132 }
1133
1134 int
1135 be_entry_get_rw(
1136         Operation *op,
1137         struct berval *ndn,
1138         ObjectClass *oc,
1139         AttributeDescription *at,
1140         int rw,
1141         Entry **e )
1142 {
1143         int rc;
1144
1145         *e = NULL;
1146
1147         if (op->o_bd == NULL) {
1148                 rc = LDAP_NO_SUCH_OBJECT;
1149         } else if ( op->o_bd->be_fetch ) {
1150                 rc = ( op->o_bd->be_fetch )( op, ndn,
1151                         oc, at, rw, e );
1152         } else {
1153                 rc = LDAP_UNWILLING_TO_PERFORM;
1154         }
1155         return rc;
1156 }
1157
1158 int
1159 backend_group(
1160         Operation *op,
1161         Entry   *target,
1162         struct berval *gr_ndn,
1163         struct berval *op_ndn,
1164         ObjectClass *group_oc,
1165         AttributeDescription *group_at
1166 )
1167 {
1168         Entry *e;
1169         Attribute *a;
1170         int rc;
1171         GroupAssertion *g;
1172         Backend *be = op->o_bd;
1173
1174         if ( op->o_abandon ) return SLAPD_ABANDON;
1175
1176         op->o_bd = select_backend( gr_ndn, 0, 0 );
1177
1178         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1179
1180         for (g = op->o_conn->c_groups; g; g=g->ga_next) {
1181                 if (g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1182                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
1183                         continue;
1184                 if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
1185                         break;
1186         }
1187
1188         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1189
1190         if (g) {
1191                 rc = g->ga_res;
1192                 goto done;
1193         }
1194
1195         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1196                 e = target;
1197         } else {
1198                 rc = be_entry_get_rw(op, gr_ndn, group_oc, group_at, 0, &e );
1199         }
1200         if ( e ) {
1201                 a = attr_find( e->e_attrs, group_at );
1202                 if ( a ) {
1203                         /* If the attribute is a subtype of labeledURI, treat this as
1204                          * a dynamic group ala groupOfURLs
1205                          */
1206                         if (is_at_subtype( group_at->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
1207                                 int i;
1208                                 LDAPURLDesc *ludp;
1209                                 struct berval bv, nbase;
1210                                 Filter *filter;
1211                                 Entry *user;
1212                                 Backend *b2 = op->o_bd;
1213
1214                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1215                                         user = target;
1216                                 } else {
1217                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1218                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1219                                 }
1220
1221                                 if ( rc == 0 ) {
1222                                         rc = 1;
1223                                         for (i=0; a->a_vals[i].bv_val; i++) {
1224                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) != LDAP_SUCCESS )
1225                                                         continue;
1226                                                 nbase.bv_val = NULL;
1227                                                 /* host part must be empty */
1228                                                 /* attrs and extensions parts must be empty */
1229                                                 if (( ludp->lud_host && *ludp->lud_host )
1230                                                         || ludp->lud_attrs || ludp->lud_exts )
1231                                                         goto loopit;
1232                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1233                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase, op->o_tmpmemctx ) != LDAP_SUCCESS )
1234                                                         goto loopit;
1235                                                 switch(ludp->lud_scope) {
1236                                                 case LDAP_SCOPE_BASE:
1237                                                         if ( !dn_match(&nbase, op_ndn)) goto loopit;
1238                                                         break;
1239                                                 case LDAP_SCOPE_ONELEVEL:
1240                                                         dnParent(op_ndn, &bv );
1241                                                         if ( !dn_match(&nbase, &bv)) goto loopit;
1242                                                         break;
1243                                                 case LDAP_SCOPE_SUBTREE:
1244                                                         if ( !dnIsSuffix(op_ndn, &nbase)) goto loopit;
1245                                                         break;
1246                                                 }
1247                                                 filter = str2filter_x( op, ludp->lud_filter );
1248                                                 if ( filter ) {
1249                                                         if ( test_filter( NULL, user, filter ) == LDAP_COMPARE_TRUE )
1250                                                         {
1251                                                                 rc = 0;
1252                                                         }
1253                                                         filter_free_x( op, filter );
1254                                                 }
1255         loopit:
1256                                                 ldap_free_urldesc( ludp );
1257                                                 if ( nbase.bv_val ) {
1258                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1259                                                 }
1260                                                 if ( rc == 0 ) break;
1261                                         }
1262                                         if ( user != target ) {
1263                                                 be_entry_release_r( op, user );
1264                                         }
1265                                 }
1266                                 op->o_bd = b2;
1267                         } else {
1268                                 rc = value_find_ex( group_at,
1269                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1270                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1271                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1272                         }
1273                 } else {
1274                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1275                 }
1276                 if (e != target ) {
1277                         be_entry_release_r( op, e );
1278                 }
1279         } else {
1280                 rc = LDAP_NO_SUCH_OBJECT;
1281         }
1282
1283         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1284                 g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
1285                 g->ga_be = op->o_bd;
1286                 g->ga_oc = group_oc;
1287                 g->ga_at = group_at;
1288                 g->ga_res = rc;
1289                 g->ga_len = gr_ndn->bv_len;
1290                 strcpy(g->ga_ndn, gr_ndn->bv_val);
1291                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1292                 g->ga_next = op->o_conn->c_groups;
1293                 op->o_conn->c_groups = g;
1294                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1295         }
1296 done:
1297         op->o_bd = be;
1298         return rc;
1299 }
1300
1301 int
1302 backend_attribute(
1303         Operation *op,
1304         Entry   *target,
1305         struct berval   *edn,
1306         AttributeDescription *entry_at,
1307         BerVarray *vals
1308 )
1309 {
1310         Entry *e;
1311         Attribute *a;
1312         int i, j, rc = LDAP_SUCCESS;
1313         AccessControlState acl_state = ACL_STATE_INIT;
1314         Backend *be = op->o_bd;
1315
1316         op->o_bd = select_backend( edn, 0, 0 );
1317
1318         if ( target && dn_match( &target->e_nname, edn ) ) {
1319                 e = target;
1320         } else {
1321                 rc = be_entry_get_rw(op, edn, NULL, entry_at, 0, &e );
1322         }
1323
1324         if ( e ) {
1325                 a = attr_find( e->e_attrs, entry_at );
1326                 if ( a ) {
1327                         BerVarray v;
1328
1329                         if ( op->o_conn && access_allowed( op,
1330                                 e, entry_at, NULL, ACL_AUTH,
1331                                 &acl_state ) == 0 ) {
1332                                 rc = LDAP_INSUFFICIENT_ACCESS;
1333                                 goto freeit;
1334                         }
1335
1336                         for ( i=0; a->a_vals[i].bv_val; i++ ) ;
1337
1338                         v = op->o_tmpalloc( sizeof(struct berval) * (i+1), op->o_tmpmemctx );
1339                         for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
1340                                 if ( op->o_conn && access_allowed( op,
1341                                         e, entry_at,
1342                                         &a->a_nvals[i],
1343                                         ACL_AUTH, &acl_state ) == 0 ) {
1344                                         continue;
1345                                 }
1346                                 ber_dupbv_x( &v[j],
1347                                         &a->a_nvals[i], op->o_tmpmemctx );
1348                                 if (v[j].bv_val ) j++;
1349                         }
1350                         if (j == 0) {
1351                                 op->o_tmpfree( v, op->o_tmpmemctx );
1352                                 *vals = NULL;
1353                                 rc = LDAP_INSUFFICIENT_ACCESS;
1354                         } else {
1355                                 v[j].bv_val = NULL;
1356                                 v[j].bv_len = 0;
1357                                 *vals = v;
1358                                 rc = LDAP_SUCCESS;
1359                         }
1360                 }
1361 freeit:         if (e != target ) {
1362                         be_entry_release_r( op, e );
1363                 }
1364         }
1365
1366         op->o_bd = be;
1367         return rc;
1368 }
1369
1370 Attribute *backend_operational(
1371         Operation *op,
1372         SlapReply *rs,
1373         int opattrs     )
1374 {
1375         Attribute *a = NULL, **ap = &a;
1376
1377         /*
1378          * If operational attributes (allegedly) are required,
1379          * and the backend supports specific operational attributes,
1380          * add them to the attribute list
1381          */
1382         if ( opattrs || ( op->ors_attrs &&
1383                 ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )) ) {
1384                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1385                 ap = &(*ap)->a_next;
1386         }
1387
1388         if ( ( opattrs || op->ors_attrs ) && op->o_bd && op->o_bd->be_operational != NULL ) {
1389                 ( void )op->o_bd->be_operational( op, rs, opattrs, ap );
1390         }
1391
1392         return a;
1393 }
1394