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

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 #include "ldap_rq.h"
  41
  42 #ifdef LDAP_SLAPI
  43 #include "slapi/slapi.h"
  44
  45 static void init_group_pblock( Operation *op, Entry *target,
  46         Entry *e, struct berval *op_ndn, AttributeDescription *group_at );
  47 static int call_group_preop_plugins( Operation *op );
  48 static void call_group_postop_plugins( Operation *op );
  49 #endif /* LDAP_SLAPI */
  50
  51 /*
  52  * If a module is configured as dynamic, its header should not
  53  * get included into slapd. While this is a general rule and does
  54  * not have much of an effect in UNIX, this rule should be adhered
  55  * to for Windows, where dynamic object code should not be implicitly
  56  * imported into slapd without appropriate __declspec(dllimport) directives.
  57  */
  58
  59 int                     nBackendInfo = 0;
  60 BackendInfo             *backendInfo = NULL;
  61
  62 int                     nBackendDB = 0;
  63 BackendDB               *backendDB = NULL;
  64
  65 ldap_pvt_thread_pool_t  syncrepl_pool;
  66 int                     syncrepl_pool_max = SLAP_MAX_SYNCREPL_THREADS;
  67
  68 int backend_init(void)
  69 {
  70         int rc = -1;
  71
  72         ldap_pvt_thread_pool_init( &syncrepl_pool, syncrepl_pool_max, 0 );
  73
  74         if((nBackendInfo != 0) || (backendInfo != NULL)) {
  75                 /* already initialized */
  76                 Debug( LDAP_DEBUG_ANY,
  77                         "backend_init: already initialized\n", 0, 0, 0 );
  78                 return -1;
  79         }
  80
  81         for( ;
  82                 slap_binfo[nBackendInfo].bi_type != NULL;
  83                 nBackendInfo++ )
  84         {
  85                 assert( slap_binfo[nBackendInfo].bi_init );
  86
  87                 rc = slap_binfo[nBackendInfo].bi_init( &slap_binfo[nBackendInfo] );
  88
  89                 if(rc != 0) {
  90                         Debug( LDAP_DEBUG_ANY,
  91                                 "backend_init: initialized for type \"%s\"\n",
  92                                 slap_binfo[nBackendInfo].bi_type, 0, 0 );
  93                         /* destroy those we've already inited */
  94                         for( nBackendInfo--;
  95                                 nBackendInfo >= 0 ;
  96                                 nBackendInfo-- )
  97                         {
  98                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
  99                                         slap_binfo[nBackendInfo].bi_destroy(
 100                                                 &slap_binfo[nBackendInfo] );
 101                                 }
 102                         }
 103                         return rc;
 104                 }
 105         }
 106
 107         if ( nBackendInfo > 0) {
 108                 backendInfo = slap_binfo;
 109                 return 0;
 110         }
 111
 112 #ifdef SLAPD_MODULES
 113         return 0;
 114 #else
 115
 116         Debug( LDAP_DEBUG_ANY,
 117                 "backend_init: failed\n",
 118                 0, 0, 0 );
 119
 120         return rc;
 121 #endif /* SLAPD_MODULES */
 122 }
 123
 124 int backend_add(BackendInfo *aBackendInfo)
 125 {
 126         int rc = 0;
 127
 128         if ( aBackendInfo->bi_init == NULL ) {
 129                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 130                         "backend type \"%s\" does not have the (mandatory)init function\n",
 131                         aBackendInfo->bi_type, 0, 0 );
 132                 return -1;
 133         }
 134
 135    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 136                 Debug( LDAP_DEBUG_ANY,
 137                         "backend_add:  initialization for type \"%s\" failed\n",
 138                         aBackendInfo->bi_type, 0, 0 );
 139                 return rc;
 140    }
 141
 142         /* now add the backend type to the Backend Info List */
 143         {
 144                 BackendInfo *newBackendInfo = 0;
 145
 146                 /* if backendInfo == slap_binfo no deallocation of old backendInfo */
 147                 if (backendInfo == slap_binfo) {
 148                         newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 149                         AC_MEMCPY(newBackendInfo, backendInfo,
 150                                 sizeof(BackendInfo) * nBackendInfo);
 151                 } else {
 152                         newBackendInfo = ch_realloc(backendInfo,
 153                                 sizeof(BackendInfo) * (nBackendInfo + 1));
 154                 }
 155
 156                 AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 157                         sizeof(BackendInfo));
 158                 backendInfo = newBackendInfo;
 159                 nBackendInfo++;
 160                 return 0;
 161         }
 162 }
 163
 164 /* startup a specific backend database */
 165 int backend_startup_one(Backend *be)
 166 {
 167         int             rc = 0;
 168         BackendInfo     *bi = be->bd_info;
 169
 170         assert(be);
 171
 172         be->be_pending_csn_list = (struct be_pcl *)
 173                 ch_calloc( 1, sizeof( struct be_pcl ));
 174
 175         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 176
 177         /* back-relay takes care of itself; so may do other */
 178         if ( be->be_controls == NULL ) {
 179                 if ( overlay_is_over( be ) ) {
 180                         bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 181                 }
 182
 183                 if ( bi->bi_controls ) {
 184                         be->be_controls = ldap_charray_dup( bi->bi_controls );
 185                 }
 186         }
 187
 188         Debug( LDAP_DEBUG_TRACE,
 189                 "backend_startup: starting \"%s\"\n",
 190                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 191                 0, 0 );
 192         if ( be->bd_info->bi_db_open ) {
 193                 rc = be->bd_info->bi_db_open( be );
 194                 if ( rc != 0 ) {
 195                         Debug( LDAP_DEBUG_ANY,
 196                                 "backend_startup: bi_db_open failed! (%d)\n",
 197                                 rc, 0, 0 );
 198                 }
 199         }
 200
 201         /* back-relay takes care of itself; so may do other */
 202         bi = be->bd_info;
 203         if ( overlay_is_over( be ) ) {
 204                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 205         }
 206
 207         if ( bi->bi_controls ) {
 208                 if ( be->be_controls == NULL ) {
 209                         be->be_controls = ldap_charray_dup( bi->bi_controls );
 210
 211                 } else {
 212                         int     i;
 213
 214                         /* maybe not efficient, but it's startup and few dozens of controls... */
 215                         for ( i = 0; bi->bi_controls[ i ]; i++ ) {
 216                                 if ( !ldap_charray_inlist( be->be_controls, bi->bi_controls[ i ] ) ) {
 217                                         rc = ldap_charray_add( &be->be_controls, bi->bi_controls[ i ] );
 218                                         if ( rc != 0 ) {
 219                                                 break;
 220                                         }
 221                                 }
 222                         }
 223                 }
 224         }
 225
 226         return rc;
 227 }
 228
 229 int backend_startup(Backend *be)
 230 {
 231         int i;
 232         int rc = 0;
 233
 234         if( ! ( nBackendDB > 0 ) ) {
 235                 /* no databases */
 236                 Debug( LDAP_DEBUG_ANY,
 237                         "backend_startup: %d databases to startup.\n",
 238                         nBackendDB, 0, 0 );
 239                 return 1;
 240         }
 241
 242         if(be != NULL) {
 243                 if ( be->bd_info->bi_open ) {
 244                         rc = be->bd_info->bi_open( be->bd_info );
 245                         if ( rc != 0 ) {
 246                                 Debug( LDAP_DEBUG_ANY,
 247                                         "backend_startup: bi_open failed!\n",
 248                                         0, 0, 0 );
 249
 250                                 return rc;
 251                         }
 252                 }
 253
 254                 return backend_startup_one( be );
 255         }
 256
 257         /* open frontend, if required */
 258         if ( frontendDB->bd_info->bi_db_open ) {
 259                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 260                 if ( rc != 0 ) {
 261                         Debug( LDAP_DEBUG_ANY,
 262                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 263                                 rc, 0, 0 );
 264                         return rc;
 265                 }
 266         }
 267
 268         /* open each backend type */
 269         for( i = 0; i < nBackendInfo; i++ ) {
 270                 if( backendInfo[i].bi_nDB == 0) {
 271                         /* no database of this type, don't open */
 272                         continue;
 273                 }
 274
 275                 if( backendInfo[i].bi_open ) {
 276                         rc = backendInfo[i].bi_open(
 277                                 &backendInfo[i] );
 278                         if ( rc != 0 ) {
 279                                 Debug( LDAP_DEBUG_ANY,
 280                                         "backend_startup: bi_open %d failed!\n",
 281                                         i, 0, 0 );
 282                                 return rc;
 283                         }
 284                 }
 285         }
 286
 287         ldap_pvt_thread_mutex_init( &slapd_rq.rq_mutex );
 288         LDAP_STAILQ_INIT( &slapd_rq.task_list );
 289         LDAP_STAILQ_INIT( &slapd_rq.run_list );
 290
 291         /* open each backend database */
 292         for( i = 0; i < nBackendDB; i++ ) {
 293                 if ( backendDB[i].be_suffix == NULL ) {
 294                         Debug( LDAP_DEBUG_ANY,
 295                                 "backend_startup: warning, database %d (%s) "
 296                                 "has no suffix\n",
 297                                 i, backendDB[i].bd_info->bi_type, 0 );
 298                 }
 299                 /* append global access controls */
 300                 acl_append( &backendDB[i].be_acl, frontendDB->be_acl );
 301
 302                 rc = backend_startup_one( &backendDB[i] );
 303
 304                 if ( rc ) return rc;
 305
 306
 307                 if ( backendDB[i].be_syncinfo ) {
 308                         syncinfo_t *si;
 309
 310                         if ( !( backendDB[i].be_search && backendDB[i].be_add &&
 311                                 backendDB[i].be_modify && backendDB[i].be_delete )) {
 312                                 Debug( LDAP_DEBUG_ANY,
 313                                         "backend_startup: database(%d) does not support "
 314                                         "operations required for syncrepl", i, 0, 0 );
 315                                 continue;
 316                         }
 317
 318                         {
 319                                 si = backendDB[i].be_syncinfo;
 320                                 si->si_be = &backendDB[i];
 321                                 init_syncrepl( si );
 322                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 323                                 ldap_pvt_runqueue_insert( &slapd_rq,
 324                                                 si->si_interval, do_syncrepl, (void *) si );
 325                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 326                         }
 327                 }
 328         }
 329
 330         return rc;
 331 }
 332
 333 int backend_num( Backend *be )
 334 {
 335         int i;
 336
 337         if( be == NULL ) return -1;
 338
 339         for( i = 0; i < nBackendDB; i++ ) {
 340                 if( be == &backendDB[i] ) return i;
 341         }
 342         return -1;
 343 }
 344
 345 int backend_shutdown( Backend *be )
 346 {
 347         int i;
 348         int rc = 0;
 349
 350         if( be != NULL ) {
 351                 /* shutdown a specific backend database */
 352
 353                 if ( be->bd_info->bi_nDB == 0 ) {
 354                         /* no database of this type, we never opened it */
 355                         return 0;
 356                 }
 357
 358                 if ( be->bd_info->bi_db_close ) {
 359                         be->bd_info->bi_db_close( be );
 360                 }
 361
 362                 if( be->bd_info->bi_close ) {
 363                         be->bd_info->bi_close( be->bd_info );
 364                 }
 365
 366                 return 0;
 367         }
 368
 369         /* close each backend database */
 370         for( i = 0; i < nBackendDB; i++ ) {
 371                 if ( backendDB[i].bd_info->bi_db_close ) {
 372                         backendDB[i].bd_info->bi_db_close(
 373                                 &backendDB[i] );
 374                 }
 375
 376                 if(rc != 0) {
 377                         Debug( LDAP_DEBUG_ANY,
 378                                 "backend_close: bi_db_close %s failed!\n",
 379                                 backendDB[i].be_type, 0, 0 );
 380                 }
 381         }
 382
 383         /* close each backend type */
 384         for( i = 0; i < nBackendInfo; i++ ) {
 385                 if( backendInfo[i].bi_nDB == 0 ) {
 386                         /* no database of this type */
 387                         continue;
 388                 }
 389
 390                 if( backendInfo[i].bi_close ) {
 391                         backendInfo[i].bi_close(
 392                                 &backendInfo[i] );
 393                 }
 394         }
 395
 396         /* close frontend, if required */
 397         if ( frontendDB->bd_info->bi_db_close ) {
 398                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 399                 if ( rc != 0 ) {
 400                         Debug( LDAP_DEBUG_ANY,
 401                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 402                                 rc, 0, 0 );
 403                 }
 404         }
 405
 406         return 0;
 407 }
 408
 409 int backend_destroy(void)
 410 {
 411         int i;
 412         BackendDB *bd;
 413         struct slap_csn_entry *csne;
 414
 415         ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
 416
 417         /* destroy each backend database */
 418         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 419
 420                 if ( bd->be_syncinfo ) {
 421                         syncinfo_free( bd->be_syncinfo );
 422                 }
 423
 424                 if ( bd->be_pending_csn_list ) {
 425                         csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 426                         while ( csne ) {
 427                                 struct slap_csn_entry *tmp_csne = csne;
 428
 429                                 LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 430                                 ch_free( csne->ce_csn.bv_val );
 431                                 csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 432                                 ch_free( tmp_csne );
 433                         }
 434                 }
 435
 436                 if ( bd->bd_info->bi_db_destroy ) {
 437                         bd->bd_info->bi_db_destroy( bd );
 438                 }
 439                 ber_bvarray_free( bd->be_suffix );
 440                 ber_bvarray_free( bd->be_nsuffix );
 441                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 442                         free( bd->be_rootdn.bv_val );
 443                 }
 444                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 445                         free( bd->be_rootndn.bv_val );
 446                 }
 447                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 448                         free( bd->be_rootpw.bv_val );
 449                 }
 450                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 451                 if ( bd->be_controls ) {
 452                         ldap_charray_free( bd->be_controls );
 453                 }
 454         }
 455         free( backendDB );
 456
 457         /* destroy each backend type */
 458         for( i = 0; i < nBackendInfo; i++ ) {
 459                 if( backendInfo[i].bi_destroy ) {
 460                         backendInfo[i].bi_destroy(
 461                                 &backendInfo[i] );
 462                 }
 463         }
 464
 465 #ifdef SLAPD_MODULES
 466         if (backendInfo != slap_binfo) {
 467            free(backendInfo);
 468         }
 469 #endif /* SLAPD_MODULES */
 470
 471         nBackendInfo = 0;
 472         backendInfo = NULL;
 473
 474         /* destroy frontend database */
 475         bd = frontendDB;
 476         if ( bd ) {
 477                 if ( bd->bd_info->bi_db_destroy ) {
 478                         bd->bd_info->bi_db_destroy( bd );
 479                 }
 480                 ber_bvarray_free( bd->be_suffix );
 481                 ber_bvarray_free( bd->be_nsuffix );
 482                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 483                         free( bd->be_rootdn.bv_val );
 484                 }
 485                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 486                         free( bd->be_rootndn.bv_val );
 487                 }
 488                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 489                         free( bd->be_rootpw.bv_val );
 490                 }
 491                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 492         }
 493
 494         return 0;
 495 }
 496
 497 BackendInfo* backend_info(const char *type)
 498 {
 499         int i;
 500
 501         /* search for the backend type */
 502         for( i = 0; i < nBackendInfo; i++ ) {
 503                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 504                         return &backendInfo[i];
 505                 }
 506         }
 507
 508         return NULL;
 509 }
 510
 511
 512 BackendDB *
 513 backend_db_init(
 514     const char  *type )
 515 {
 516         Backend *be;
 517         BackendInfo *bi = backend_info(type);
 518         int     rc = 0;
 519
 520         if( bi == NULL ) {
 521                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 522                 return NULL;
 523         }
 524
 525         be = backendDB;
 526
 527         backendDB = (BackendDB *) ch_realloc(
 528                         (char *) backendDB,
 529                     (nBackendDB + 1) * sizeof(Backend) );
 530
 531         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 532
 533         /* did realloc move our table? if so, fix up dependent pointers */
 534         if ( be != backendDB ) {
 535                 int i;
 536                 for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
 537                         be->be_pcl_mutexp = &be->be_pcl_mutex;
 538                 }
 539         }
 540
 541         be = &backends[nbackends++];
 542
 543         be->bd_info = bi;
 544
 545         be->be_def_limit = frontendDB->be_def_limit;
 546         be->be_dfltaccess = frontendDB->be_dfltaccess;
 547
 548         be->be_restrictops = frontendDB->be_restrictops;
 549         be->be_requires = frontendDB->be_requires;
 550         be->be_ssf_set = frontendDB->be_ssf_set;
 551
 552         be->be_pcl_mutexp = &be->be_pcl_mutex;
 553         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 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         if ( frontendDB->bd_info->bi_db_close ) {
 584                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 585         }
 586
 587 }
 588
 589 Backend *
 590 select_backend(
 591         struct berval * dn,
 592         int manageDSAit,
 593         int noSubs )
 594 {
 595         int             i, j;
 596         ber_len_t       len, dnlen = dn->bv_len;
 597         Backend         *be = NULL;
 598
 599         for ( i = 0; i < nbackends; i++ ) {
 600                 if ( backends[i].be_nsuffix == NULL ) {
 601                         continue;
 602                 }
 603
 604                 for ( j = 0; !BER_BVISNULL( &backends[i].be_nsuffix[j] ); j++ )
 605                 {
 606                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 607                                 && noSubs )
 608                         {
 609                                 continue;
 610                         }
 611
 612                         len = backends[i].be_nsuffix[j].bv_len;
 613
 614                         if ( len > dnlen ) {
 615                                 /* suffix is longer than DN */
 616                                 continue;
 617                         }
 618
 619                         /*
 620                          * input DN is normalized, so the separator check
 621                          * need not look at escaping
 622                          */
 623                         if ( len && len < dnlen &&
 624                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 625                         {
 626                                 continue;
 627                         }
 628
 629                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 630                                 &dn->bv_val[dnlen-len] ) == 0 )
 631                         {
 632                                 if( be == NULL ) {
 633                                         be = &backends[i];
 634
 635                                         if( manageDSAit && len == dnlen &&
 636                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 637                                                 continue;
 638                                         }
 639                                 } else {
 640                                         be = &backends[i];
 641                                 }
 642                                 return be;
 643                         }
 644                 }
 645         }
 646
 647         return be;
 648 }
 649
 650 int
 651 be_issuffix(
 652     Backend *be,
 653     struct berval *bvsuffix )
 654 {
 655         int     i;
 656
 657         if ( be->be_nsuffix == NULL ) {
 658                 return 0;
 659         }
 660
 661         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 662                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 663                         return 1;
 664                 }
 665         }
 666
 667         return 0;
 668 }
 669
 670 int
 671 be_isroot_dn( Backend *be, struct berval *ndn )
 672 {
 673         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 674                 return 0;
 675         }
 676
 677         return dn_match( &be->be_rootndn, ndn );
 678 }
 679
 680 int
 681 be_slurp_update( Operation *op )
 682 {
 683         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 684                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 685 }
 686
 687 int
 688 be_shadow_update( Operation *op )
 689 {
 690         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 691                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 692 }
 693
 694 int
 695 be_isupdate_dn( Backend *be, struct berval *ndn )
 696 {
 697         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 698                 return 0;
 699         }
 700
 701         return dn_match( &be->be_update_ndn, ndn );
 702 }
 703
 704 struct berval *
 705 be_root_dn( Backend *be )
 706 {
 707         return &be->be_rootdn;
 708 }
 709
 710 int
 711 be_isroot( Operation *op )
 712 {
 713         return be_isroot_dn( op->o_bd, &op->o_ndn );
 714 }
 715
 716 int
 717 be_isroot_pw( Operation *op )
 718 {
 719         int result;
 720
 721         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 722                 return 0;
 723         }
 724
 725         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 726                 return 0;
 727         }
 728
 729 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 730         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 731 #ifdef SLAPD_SPASSWD
 732         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 733 #endif
 734 #endif
 735
 736         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 737
 738 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 739 #ifdef SLAPD_SPASSWD
 740         lutil_passwd_sasl_conn = NULL;
 741 #endif
 742         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 743 #endif
 744
 745         return result == 0;
 746 }
 747
 748 int
 749 be_entry_release_rw(
 750         Operation *op,
 751         Entry *e,
 752         int rw )
 753 {
 754         if ( op->o_bd->be_release ) {
 755                 /* free and release entry from backend */
 756                 return op->o_bd->be_release( op, e, rw );
 757         } else {
 758                 /* free entry */
 759                 entry_free( e );
 760                 return 0;
 761         }
 762 }
 763
 764 int
 765 backend_unbind( Operation *op, SlapReply *rs )
 766 {
 767         int             i;
 768
 769         for ( i = 0; i < nbackends; i++ ) {
 770 #if defined( LDAP_SLAPI )
 771                 if ( op->o_pb ) {
 772                         int rc;
 773                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 774                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
 775                         rc = slapi_int_call_plugins( &backends[i],
 776                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 777                         if ( rc < 0 ) {
 778                                 /*
 779                                  * A preoperation plugin failure will abort the
 780                                  * entire operation.
 781                                  */
 782                                 Debug(LDAP_DEBUG_TRACE,
 783                                         "do_bind: Unbind preoperation plugin failed\n",
 784                                         0, 0, 0);
 785                                 return 0;
 786                         }
 787                 }
 788 #endif /* defined( LDAP_SLAPI ) */
 789
 790                 if ( backends[i].be_unbind ) {
 791                         op->o_bd = &backends[i];
 792                         (*backends[i].be_unbind)( op, rs );
 793                 }
 794
 795 #if defined( LDAP_SLAPI )
 796                 if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
 797                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 798                 {
 799                         Debug(LDAP_DEBUG_TRACE,
 800                                 "do_unbind: Unbind postoperation plugins failed\n",
 801                                 0, 0, 0);
 802                 }
 803 #endif /* defined( LDAP_SLAPI ) */
 804         }
 805
 806         return 0;
 807 }
 808
 809 int
 810 backend_connection_init(
 811         Connection   *conn )
 812 {
 813         int     i;
 814
 815         for ( i = 0; i < nbackends; i++ ) {
 816                 if ( backends[i].be_connection_init ) {
 817                         (*backends[i].be_connection_init)( &backends[i], conn);
 818                 }
 819         }
 820
 821         return 0;
 822 }
 823
 824 int
 825 backend_connection_destroy(
 826         Connection   *conn )
 827 {
 828         int     i;
 829
 830         for ( i = 0; i < nbackends; i++ ) {
 831                 if ( backends[i].be_connection_destroy ) {
 832                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 833                 }
 834         }
 835
 836         return 0;
 837 }
 838
 839 static int
 840 backend_check_controls(
 841         Operation *op,
 842         SlapReply *rs )
 843 {
 844         LDAPControl **ctrls = op->o_ctrls;
 845         rs->sr_err = LDAP_SUCCESS;
 846
 847         if( ctrls ) {
 848                 for( ; *ctrls != NULL ; ctrls++ ) {
 849                         int cid;
 850                         if( slap_find_control_id( (*ctrls)->ldctl_oid, &cid ) ==
 851                                 LDAP_CONTROL_NOT_FOUND )
 852                         {
 853                                 /* unrecognized control */
 854                                 if ( (*ctrls)->ldctl_iscritical ) {
 855                                         /* should not be reachable */
 856                                         Debug( LDAP_DEBUG_ANY,
 857                                                 "backend_check_controls: unrecognized control: %s\n",
 858                                                 (*ctrls)->ldctl_oid, 0, 0 );
 859                                         assert( 0 );
 860                                 }
 861
 862                         } else if ( !slap_global_control( op, (*ctrls)->ldctl_oid ) &&
 863                                 !ldap_charray_inlist( op->o_bd->be_controls,
 864                                         (*ctrls)->ldctl_oid ) )
 865                         {
 866                                 /* Per RFC 2251 (and LDAPBIS discussions), if the control
 867                                  * is recognized and appropriate for the operation (which
 868                                  * we've already verified), then the server should make
 869                                  * use of the control when performing the operation.
 870                                  *
 871                                  * Here we find that operation extended by the control
 872                                  * is not unavailable in a particular context, hence the
 873                                  * return of unwillingToPerform.
 874                                  */
 875                                 rs->sr_text = "control unavailable in context";
 876                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 877                                 break;
 878                         }
 879                 }
 880         }
 881
 882         return rs->sr_err;
 883 }
 884
 885 int
 886 backend_check_restrictions(
 887         Operation *op,
 888         SlapReply *rs,
 889         struct berval *opdata )
 890 {
 891         slap_mask_t restrictops;
 892         slap_mask_t requires;
 893         slap_mask_t opflag;
 894         slap_mask_t exopflag = 0;
 895         slap_ssf_set_t *ssf;
 896         int updateop = 0;
 897         int starttls = 0;
 898         int session = 0;
 899
 900         if( op->o_bd ) {
 901                 if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
 902                         return rs->sr_err;
 903                 }
 904
 905                 restrictops = op->o_bd->be_restrictops;
 906                 requires = op->o_bd->be_requires;
 907                 ssf = &op->o_bd->be_ssf_set;
 908
 909         } else {
 910                 restrictops = frontendDB->be_restrictops;
 911                 requires = frontendDB->be_requires;
 912                 ssf = &frontendDB->be_ssf_set;
 913         }
 914
 915         switch( op->o_tag ) {
 916         case LDAP_REQ_ADD:
 917                 opflag = SLAP_RESTRICT_OP_ADD;
 918                 updateop++;
 919                 break;
 920         case LDAP_REQ_BIND:
 921                 opflag = SLAP_RESTRICT_OP_BIND;
 922                 session++;
 923                 break;
 924         case LDAP_REQ_COMPARE:
 925                 opflag = SLAP_RESTRICT_OP_COMPARE;
 926                 break;
 927         case LDAP_REQ_DELETE:
 928                 updateop++;
 929                 opflag = SLAP_RESTRICT_OP_DELETE;
 930                 break;
 931         case LDAP_REQ_EXTENDED:
 932                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 933
 934                 if( !opdata ) {
 935                         /* treat unspecified as a modify */
 936                         opflag = SLAP_RESTRICT_OP_MODIFY;
 937                         updateop++;
 938                         break;
 939                 }
 940
 941                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 942                         session++;
 943                         starttls++;
 944                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 945                         break;
 946                 }
 947
 948                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 949                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 950                         break;
 951                 }
 952
 953                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 954                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 955                         break;
 956                 }
 957
 958                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 959                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 960                         updateop++;
 961                         break;
 962                 }
 963
 964                 /* treat everything else as a modify */
 965                 opflag = SLAP_RESTRICT_OP_MODIFY;
 966                 updateop++;
 967                 break;
 968
 969         case LDAP_REQ_MODIFY:
 970                 updateop++;
 971                 opflag = SLAP_RESTRICT_OP_MODIFY;
 972                 break;
 973         case LDAP_REQ_RENAME:
 974                 updateop++;
 975                 opflag = SLAP_RESTRICT_OP_RENAME;
 976                 break;
 977         case LDAP_REQ_SEARCH:
 978                 opflag = SLAP_RESTRICT_OP_SEARCH;
 979                 break;
 980         case LDAP_REQ_UNBIND:
 981                 session++;
 982                 opflag = 0;
 983                 break;
 984         default:
 985                 rs->sr_text = "restrict operations internal error";
 986                 rs->sr_err = LDAP_OTHER;
 987                 return rs->sr_err;
 988         }
 989
 990         if ( !starttls ) {
 991                 /* these checks don't apply to StartTLS */
 992
 993                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 994                 if( op->o_transport_ssf < ssf->sss_transport ) {
 995                         rs->sr_text = op->o_transport_ssf
 996                                 ? "stronger transport confidentiality required"
 997                                 : "transport confidentiality required";
 998                         return rs->sr_err;
 999                 }
1000
1001                 if( op->o_tls_ssf < ssf->sss_tls ) {
1002                         rs->sr_text = op->o_tls_ssf
1003                                 ? "stronger TLS confidentiality required"
1004                                 : "TLS confidentiality required";
1005                         return rs->sr_err;
1006                 }
1007
1008
1009                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1010                         /* simple bind specific check */
1011                         if( op->o_ssf < ssf->sss_simple_bind ) {
1012                                 rs->sr_text = op->o_ssf
1013                                         ? "stronger confidentiality required"
1014                                         : "confidentiality required";
1015                                 return rs->sr_err;
1016                         }
1017                 }
1018
1019                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1020                         /* these checks don't apply to SASL bind */
1021
1022                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1023                                 rs->sr_text = op->o_sasl_ssf
1024                                         ? "stronger SASL confidentiality required"
1025                                         : "SASL confidentiality required";
1026                                 return rs->sr_err;
1027                         }
1028
1029                         if( op->o_ssf < ssf->sss_ssf ) {
1030                                 rs->sr_text = op->o_ssf
1031                                         ? "stronger confidentiality required"
1032                                         : "confidentiality required";
1033                                 return rs->sr_err;
1034                         }
1035                 }
1036
1037                 if( updateop ) {
1038                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1039                                 rs->sr_text = op->o_transport_ssf
1040                                         ? "stronger transport confidentiality required for update"
1041                                         : "transport confidentiality required for update";
1042                                 return rs->sr_err;
1043                         }
1044
1045                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1046                                 rs->sr_text = op->o_tls_ssf
1047                                         ? "stronger TLS confidentiality required for update"
1048                                         : "TLS confidentiality required for update";
1049                                 return rs->sr_err;
1050                         }
1051
1052                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1053                                 rs->sr_text = op->o_sasl_ssf
1054                                         ? "stronger SASL confidentiality required for update"
1055                                         : "SASL confidentiality required for update";
1056                                 return rs->sr_err;
1057                         }
1058
1059                         if( op->o_ssf < ssf->sss_update_ssf ) {
1060                                 rs->sr_text = op->o_ssf
1061                                         ? "stronger confidentiality required for update"
1062                                         : "confidentiality required for update";
1063                                 return rs->sr_err;
1064                         }
1065
1066                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1067                                 BER_BVISEMPTY( &op->o_ndn ) )
1068                         {
1069                                 rs->sr_text = "modifications require authentication";
1070                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1071                                 return rs->sr_err;
1072                         }
1073
1074 #ifdef SLAP_X_LISTENER_MOD
1075                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) ? S_IWUSR : S_IWOTH ) ) ) {
1076                                 /* no "w" mode means readonly */
1077                                 rs->sr_text = "modifications not allowed on this listener";
1078                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1079                                 return rs->sr_err;
1080                         }
1081 #endif /* SLAP_X_LISTENER_MOD */
1082                 }
1083         }
1084
1085         if ( !session ) {
1086                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1087
1088                 if( requires & SLAP_REQUIRE_STRONG ) {
1089                         /* should check mechanism */
1090                         if( ( op->o_transport_ssf < ssf->sss_transport
1091                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1092                                 || BER_BVISEMPTY( &op->o_dn ) )
1093                         {
1094                                 rs->sr_text = "strong(er) authentication required";
1095                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1096                                 return rs->sr_err;
1097                         }
1098                 }
1099
1100                 if( requires & SLAP_REQUIRE_SASL ) {
1101                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1102                                 rs->sr_text = "SASL authentication required";
1103                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1104                                 return rs->sr_err;
1105                         }
1106                 }
1107
1108                 if( requires & SLAP_REQUIRE_AUTHC ) {
1109                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1110                                 rs->sr_text = "authentication required";
1111                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1112                                 return rs->sr_err;
1113                         }
1114                 }
1115
1116                 if( requires & SLAP_REQUIRE_BIND ) {
1117                         int version;
1118                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1119                         version = op->o_conn->c_protocol;
1120                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1121
1122                         if( !version ) {
1123                                 /* no bind has occurred */
1124                                 rs->sr_text = "BIND required";
1125                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1126                                 return rs->sr_err;
1127                         }
1128                 }
1129
1130                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1131                         if( op->o_protocol < LDAP_VERSION3 ) {
1132                                 /* no bind has occurred */
1133                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1134                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1135                                 return rs->sr_err;
1136                         }
1137                 }
1138
1139 #ifdef SLAP_X_LISTENER_MOD
1140                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1141                         if ( op->o_conn->c_listener &&
1142                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1143                 {
1144                                 /* no "x" mode means bind required */
1145                                 rs->sr_text = "bind required on this listener";
1146                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1147                                 return rs->sr_err;
1148                         }
1149                 }
1150
1151                 if ( !starttls && !updateop ) {
1152                         if ( op->o_conn->c_listener &&
1153                                 !( op->o_conn->c_listener->sl_perms &
1154                                         ( !BER_BVISEMPTY( &op->o_dn ) ? S_IRUSR : S_IROTH )))
1155                         {
1156                                 /* no "r" mode means no read */
1157                                 rs->sr_text = "read not allowed on this listener";
1158                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1159                                 return rs->sr_err;
1160                         }
1161                 }
1162 #endif /* SLAP_X_LISTENER_MOD */
1163
1164         }
1165
1166         if( ( restrictops & opflag )
1167                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1168                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1169                         rs->sr_text = "read operations restricted";
1170                 } else if ( restrictops & exopflag ) {
1171                         rs->sr_text = "extended operation restricted";
1172                 } else {
1173                         rs->sr_text = "operation restricted";
1174                 }
1175                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1176                 return rs->sr_err;
1177         }
1178
1179         rs->sr_err = LDAP_SUCCESS;
1180         return rs->sr_err;
1181 }
1182
1183 int backend_check_referrals( Operation *op, SlapReply *rs )
1184 {
1185         rs->sr_err = LDAP_SUCCESS;
1186
1187         if( op->o_bd->be_chk_referrals ) {
1188                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1189
1190                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1191                         send_ldap_result( op, rs );
1192                 }
1193         }
1194
1195         return rs->sr_err;
1196 }
1197
1198 int
1199 be_entry_get_rw(
1200         Operation *op,
1201         struct berval *ndn,
1202         ObjectClass *oc,
1203         AttributeDescription *at,
1204         int rw,
1205         Entry **e )
1206 {
1207         int rc;
1208
1209         *e = NULL;
1210
1211         if (op->o_bd == NULL) {
1212                 rc = LDAP_NO_SUCH_OBJECT;
1213         } else if ( op->o_bd->be_fetch ) {
1214                 rc = ( op->o_bd->be_fetch )( op, ndn,
1215                         oc, at, rw, e );
1216         } else {
1217                 rc = LDAP_UNWILLING_TO_PERFORM;
1218         }
1219         return rc;
1220 }
1221
1222 int
1223 backend_group(
1224         Operation *op,
1225         Entry   *target,
1226         struct berval *gr_ndn,
1227         struct berval *op_ndn,
1228         ObjectClass *group_oc,
1229         AttributeDescription *group_at )
1230 {
1231         Entry *e;
1232         Attribute *a;
1233         int rc;
1234         GroupAssertion *g;
1235         Backend *be = op->o_bd;
1236
1237         if ( op->o_abandon ) return SLAPD_ABANDON;
1238
1239         op->o_bd = select_backend( gr_ndn, 0, 0 );
1240
1241         for ( g = op->o_groups; g; g = g->ga_next ) {
1242                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1243                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1244                 {
1245                         continue;
1246                 }
1247                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1248                         break;
1249                 }
1250         }
1251
1252         if ( g ) {
1253                 rc = g->ga_res;
1254                 goto done;
1255         }
1256
1257         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1258                 e = target;
1259                 rc = 0;
1260         } else {
1261                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1262         }
1263         if ( e ) {
1264 #ifdef LDAP_SLAPI
1265                 if ( op->o_pb != NULL ) {
1266                         init_group_pblock( op, target, e, op_ndn, group_at );
1267
1268                         rc = call_group_preop_plugins( op );
1269                         if ( rc == LDAP_SUCCESS ) {
1270                                 goto done;
1271                         }
1272                 }
1273 #endif /* LDAP_SLAPI */
1274
1275                 a = attr_find( e->e_attrs, group_at );
1276                 if ( a ) {
1277                         /* If the attribute is a subtype of labeledURI, treat this as
1278                          * a dynamic group ala groupOfURLs
1279                          */
1280                         if (is_at_subtype( group_at->ad_type,
1281                                 slap_schema.si_ad_labeledURI->ad_type ) )
1282                         {
1283                                 int i;
1284                                 LDAPURLDesc *ludp;
1285                                 struct berval bv, nbase;
1286                                 Filter *filter;
1287                                 Entry *user;
1288                                 Backend *b2 = op->o_bd;
1289
1290                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1291                                         user = target;
1292                                 } else {
1293                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1294                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1295                                 }
1296
1297                                 if ( rc == 0 ) {
1298                                         rc = 1;
1299                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1300                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1301                                                         LDAP_URL_SUCCESS )
1302                                                 {
1303                                                         continue;
1304                                                 }
1305                                                 BER_BVZERO( &nbase );
1306                                                 /* host part must be empty */
1307                                                 /* attrs and extensions parts must be empty */
1308                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1309                                                         ludp->lud_attrs || ludp->lud_exts )
1310                                                 {
1311                                                         goto loopit;
1312                                                 }
1313                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1314                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1315                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1316                                                 {
1317                                                         goto loopit;
1318                                                 }
1319                                                 switch ( ludp->lud_scope ) {
1320                                                 case LDAP_SCOPE_BASE:
1321                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1322                                                                 goto loopit;
1323                                                         }
1324                                                         break;
1325                                                 case LDAP_SCOPE_ONELEVEL:
1326                                                         dnParent( op_ndn, &bv );
1327                                                         if ( !dn_match( &nbase, &bv ) ) {
1328                                                                 goto loopit;
1329                                                         }
1330                                                         break;
1331                                                 case LDAP_SCOPE_SUBTREE:
1332                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1333                                                                 goto loopit;
1334                                                         }
1335                                                         break;
1336 #ifdef LDAP_SCOPE_SUBORDINATE
1337                                                 case LDAP_SCOPE_SUBORDINATE:
1338                                                         if ( dn_match( &nbase, op_ndn ) ||
1339                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1340                                                         {
1341                                                                 goto loopit;
1342                                                         }
1343 #endif
1344                                                 }
1345                                                 filter = str2filter_x( op, ludp->lud_filter );
1346                                                 if ( filter ) {
1347                                                         if ( test_filter( NULL, user, filter ) ==
1348                                                                 LDAP_COMPARE_TRUE )
1349                                                         {
1350                                                                 rc = 0;
1351                                                         }
1352                                                         filter_free_x( op, filter );
1353                                                 }
1354 loopit:
1355                                                 ldap_free_urldesc( ludp );
1356                                                 if ( !BER_BVISNULL( &nbase ) ) {
1357                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1358                                                 }
1359                                                 if ( rc == 0 ) break;
1360                                         }
1361                                         if ( user != target ) {
1362                                                 be_entry_release_r( op, user );
1363                                         }
1364                                 }
1365                                 op->o_bd = b2;
1366                         } else {
1367                                 rc = value_find_ex( group_at,
1368                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1369                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1370                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1371                         }
1372                 } else {
1373                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1374                 }
1375                 if (e != target ) {
1376                         be_entry_release_r( op, e );
1377                 }
1378         } else {
1379                 rc = LDAP_NO_SUCH_OBJECT;
1380         }
1381
1382 #ifdef LDAP_SLAPI
1383         if ( op->o_pb ) call_group_postop_plugins( op );
1384 #endif /* LDAP_SLAPI */
1385
1386         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1387                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1388                         op->o_tmpmemctx );
1389                 g->ga_be = op->o_bd;
1390                 g->ga_oc = group_oc;
1391                 g->ga_at = group_at;
1392                 g->ga_res = rc;
1393                 g->ga_len = gr_ndn->bv_len;
1394                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1395                 g->ga_next = op->o_groups;
1396                 op->o_groups = g;
1397         }
1398 done:
1399         op->o_bd = be;
1400         return rc;
1401 }
1402
1403 #ifdef LDAP_SLAPI
1404 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1405 {
1406         BerVarray v;
1407         int rc;
1408         BerVarray *vals = (BerVarray *)c->cac_private;
1409         Operation *op = NULL;
1410         int i, j;
1411
1412         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1413         if ( op == NULL ) {
1414                 return 1;
1415         }
1416
1417         if ( op->o_conn && access_allowed( op,
1418                 e, a->a_desc, NULL, ACL_AUTH,
1419                 &c->cac_acl_state ) == 0 ) {
1420                 return 1;
1421         }
1422
1423         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) ;
1424
1425         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1426                 op->o_tmpmemctx );
1427         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1428                 if ( op->o_conn && access_allowed( op,
1429                         e, a->a_desc,
1430                         &a->a_nvals[i],
1431                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1432                         continue;
1433                 }
1434                 ber_dupbv_x( &v[j],
1435                         &a->a_nvals[i], op->o_tmpmemctx );
1436                 if ( !BER_BVISNULL( &v[j] ) ) {
1437                         j++;
1438                 }
1439         }
1440
1441         if ( j == 0 ) {
1442                 op->o_tmpfree( v, op->o_tmpmemctx );
1443                 *vals = NULL;
1444                 rc = 1;
1445         } else {
1446                 BER_BVZERO( &v[j] );
1447                 *vals = v;
1448                 rc = 0;
1449         }
1450
1451         return rc;
1452 }
1453 #endif /* LDAP_SLAPI */
1454
1455 int
1456 backend_attribute(
1457         Operation *op,
1458         Entry   *target,
1459         struct berval   *edn,
1460         AttributeDescription *entry_at,
1461         BerVarray *vals,
1462         slap_access_t access )
1463 {
1464         Entry                   *e = NULL;
1465         Attribute               *a = NULL;
1466         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1467         AccessControlState      acl_state = ACL_STATE_INIT;
1468         Backend                 *be = op->o_bd;
1469
1470         op->o_bd = select_backend( edn, 0, 0 );
1471
1472         if ( target && dn_match( &target->e_nname, edn ) ) {
1473                 e = target;
1474
1475         } else {
1476                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1477         }
1478
1479         if ( e ) {
1480                 a = attr_find( e->e_attrs, entry_at );
1481                 if ( a == NULL ) {
1482                         SlapReply       rs = { 0 };
1483                         AttributeName   anlist[ 2 ];
1484
1485                         anlist[ 0 ].an_name = entry_at->ad_cname;
1486                         anlist[ 0 ].an_desc = entry_at;
1487                         BER_BVZERO( &anlist[ 1 ].an_name );
1488                         rs.sr_attrs = anlist;
1489
1490                         /* NOTE: backend_operational() is also called
1491                          * when returning results, so it's supposed
1492                          * to do no harm to entries */
1493                         rs.sr_entry = e;
1494                         rc = backend_operational( op, &rs );
1495                         rs.sr_entry = NULL;
1496
1497                         if ( rc == LDAP_SUCCESS ) {
1498                                 if ( rs.sr_operational_attrs ) {
1499                                         freeattr = 1;
1500                                         a = rs.sr_operational_attrs;
1501
1502                                 } else {
1503                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1504                                 }
1505                         }
1506                 }
1507
1508                 if ( a ) {
1509                         BerVarray v;
1510
1511                         if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1512                                 e, entry_at, NULL, access,
1513                                 &acl_state ) == 0 ) {
1514                                 rc = LDAP_INSUFFICIENT_ACCESS;
1515                                 goto freeit;
1516                         }
1517
1518                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1519                                 ;
1520
1521                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1522                                 op->o_tmpmemctx );
1523                         for ( i = 0,j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1524                         {
1525                                 if ( op->o_conn && access > ACL_NONE &&
1526                                                 access_allowed( op, e,
1527                                                         entry_at,
1528                                                         &a->a_nvals[i],
1529                                                         access,
1530                                                         &acl_state ) == 0 )
1531                                 {
1532                                         continue;
1533                                 }
1534                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1535                                                 op->o_tmpmemctx );
1536                                 if ( !BER_BVISNULL( &v[j] ) ) {
1537                                         j++;
1538                                 }
1539                         }
1540                         if ( j == 0 ) {
1541                                 op->o_tmpfree( v, op->o_tmpmemctx );
1542                                 *vals = NULL;
1543                                 rc = LDAP_INSUFFICIENT_ACCESS;
1544
1545                         } else {
1546                                 BER_BVZERO( &v[j] );
1547                                 *vals = v;
1548                                 rc = LDAP_SUCCESS;
1549                         }
1550                 }
1551 #ifdef LDAP_SLAPI
1552                 else if ( op->o_pb ) {
1553                         /* try any computed attributes */
1554                         computed_attr_context   ctx;
1555
1556                         slapi_int_pblock_set_operation( op->o_pb, op );
1557
1558                         ctx.cac_pb = op->o_pb;
1559                         ctx.cac_attrs = NULL;
1560                         ctx.cac_userattrs = 0;
1561                         ctx.cac_opattrs = 0;
1562                         ctx.cac_acl_state = acl_state;
1563                         ctx.cac_private = (void *)vals;
1564
1565                         rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr );
1566                         if ( rc == 1 ) {
1567                                 rc = LDAP_INSUFFICIENT_ACCESS;
1568
1569                         } else {
1570                                 rc = LDAP_SUCCESS;
1571                         }
1572                 }
1573 #endif /* LDAP_SLAPI */
1574 freeit:         if ( e != target ) {
1575                         be_entry_release_r( op, e );
1576                 }
1577                 if ( freeattr ) {
1578                         attr_free( a );
1579                 }
1580         }
1581
1582         op->o_bd = be;
1583         return rc;
1584 }
1585
1586 #ifdef LDAP_SLAPI
1587 static int backend_compute_output_attr_access(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1588 {
1589         struct berval   *nval = (struct berval *)c->cac_private;
1590         Operation       *op = NULL;
1591
1592         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1593         if ( op == NULL ) {
1594                 return 1;
1595         }
1596
1597         return access_allowed( op, e, a->a_desc, nval, ACL_AUTH, NULL ) == 0;
1598 }
1599 #endif /* LDAP_SLAPI */
1600
1601 int
1602 backend_access(
1603         Operation               *op,
1604         Entry                   *target,
1605         struct berval           *edn,
1606         AttributeDescription    *entry_at,
1607         struct berval           *nval,
1608         slap_access_t           access,
1609         slap_mask_t             *mask )
1610 {
1611         Entry           *e = NULL;
1612         int             rc = LDAP_INSUFFICIENT_ACCESS;
1613         Backend         *be = op->o_bd;
1614
1615         /* pedantic */
1616         assert( op );
1617         assert( op->o_conn );
1618         assert( edn );
1619         assert( access > ACL_NONE );
1620
1621         op->o_bd = select_backend( edn, 0, 0 );
1622
1623         if ( target && dn_match( &target->e_nname, edn ) ) {
1624                 e = target;
1625
1626         } else {
1627                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1628         }
1629
1630         if ( e ) {
1631                 Attribute       *a = NULL;
1632                 int             freeattr = 0;
1633
1634                 if ( entry_at == NULL ) {
1635                         entry_at = slap_schema.si_ad_entry;
1636                 }
1637
1638                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1639                 {
1640                         if ( access_allowed_mask( op, e, entry_at,
1641                                         NULL, access, NULL, mask ) == 0 )
1642                         {
1643                                 rc = LDAP_INSUFFICIENT_ACCESS;
1644
1645                         } else {
1646                                 rc = LDAP_SUCCESS;
1647                         }
1648
1649                 } else {
1650                         a = attr_find( e->e_attrs, entry_at );
1651                         if ( a == NULL ) {
1652                                 SlapReply       rs = { 0 };
1653                                 AttributeName   anlist[ 2 ];
1654
1655                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1656                                 anlist[ 0 ].an_desc = entry_at;
1657                                 BER_BVZERO( &anlist[ 1 ].an_name );
1658                                 rs.sr_attrs = anlist;
1659
1660                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1661
1662                                 /* NOTE: backend_operational() is also called
1663                                  * when returning results, so it's supposed
1664                                  * to do no harm to entries */
1665                                 rs.sr_entry = e;
1666                                 rc = backend_operational( op, &rs );
1667                                 rs.sr_entry = NULL;
1668
1669                                 if ( rc == LDAP_SUCCESS ) {
1670                                         if ( rs.sr_operational_attrs ) {
1671                                                 freeattr = 1;
1672                                                 a = rs.sr_operational_attrs;
1673
1674                                         } else {
1675                                                 rc = LDAP_NO_SUCH_OBJECT;
1676                                         }
1677                                 }
1678                         }
1679
1680                         if ( a ) {
1681                                 if ( access_allowed_mask( op, e, entry_at,
1682                                                 nval, access, NULL, mask ) == 0 )
1683                                 {
1684                                         rc = LDAP_INSUFFICIENT_ACCESS;
1685                                         goto freeit;
1686                                 }
1687                                 rc = LDAP_SUCCESS;
1688                         }
1689 #ifdef LDAP_SLAPI
1690                         else if ( op->o_pb ) {
1691                                 /* try any computed attributes */
1692                                 computed_attr_context   ctx;
1693
1694                                 slapi_int_pblock_set_operation( op->o_pb, op );
1695
1696                                 ctx.cac_pb = op->o_pb;
1697                                 ctx.cac_attrs = NULL;
1698                                 ctx.cac_userattrs = 0;
1699                                 ctx.cac_opattrs = 0;
1700                                 ctx.cac_private = (void *)nval;
1701
1702                                 rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr_access );
1703                                 if ( rc == 1 ) {
1704                                         rc = LDAP_INSUFFICIENT_ACCESS;
1705
1706                                 } else {
1707                                         rc = LDAP_SUCCESS;
1708                                 }
1709                         }
1710 #endif /* LDAP_SLAPI */
1711                 }
1712 freeit:         if ( e != target ) {
1713                         be_entry_release_r( op, e );
1714                 }
1715                 if ( freeattr ) {
1716                         attr_free( a );
1717                 }
1718         }
1719
1720         op->o_bd = be;
1721         return rc;
1722 }
1723
1724 int backend_operational(
1725         Operation *op,
1726         SlapReply *rs )
1727 {
1728         Attribute       **ap;
1729         int             rc = 0;
1730         BackendDB       *be_orig;
1731
1732         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1733                 /* just count them */ ;
1734
1735         /*
1736          * If operational attributes (allegedly) are required,
1737          * and the backend supports specific operational attributes,
1738          * add them to the attribute list
1739          */
1740         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1741                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs )))
1742         {
1743                 *ap = slap_operational_entryDN( rs->sr_entry );
1744                 ap = &(*ap)->a_next;
1745         }
1746
1747         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1748                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs )))
1749         {
1750                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1751                 ap = &(*ap)->a_next;
1752         }
1753
1754         /* Let the overlays have a chance at this */
1755         be_orig = op->o_bd;
1756         if ( SLAP_ISOVERLAY( be_orig ))
1757                 op->o_bd = select_backend( be_orig->be_nsuffix, 0, 0 );
1758
1759         if (( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1760                 op->o_bd && op->o_bd->be_operational != NULL )
1761         {
1762                 Attribute       *a;
1763
1764                 a = rs->sr_operational_attrs;
1765                 rs->sr_operational_attrs = NULL;
1766                 rc = op->o_bd->be_operational( op, rs );
1767                 *ap = rs->sr_operational_attrs;
1768                 if ( a != NULL ) {
1769                         rs->sr_operational_attrs = a;
1770                 }
1771
1772                 for ( ; *ap; ap = &(*ap)->a_next )
1773                         /* just count them */ ;
1774         }
1775         op->o_bd = be_orig;
1776
1777         return rc;
1778 }
1779
1780 #ifdef LDAP_SLAPI
1781 static void init_group_pblock( Operation *op, Entry *target,
1782         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1783 {
1784         slapi_int_pblock_set_operation( op->o_pb, op );
1785
1786         slapi_pblock_set( op->o_pb,
1787                 SLAPI_X_GROUP_ENTRY, (void *)e );
1788         slapi_pblock_set( op->o_pb,
1789                 SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1790         slapi_pblock_set( op->o_pb,
1791                 SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1792         slapi_pblock_set( op->o_pb,
1793                 SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1794 }
1795
1796 static int call_group_preop_plugins( Operation *op )
1797 {
1798         int rc;
1799
1800         rc = slapi_int_call_plugins( op->o_bd,
1801                 SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1802         if ( rc < 0 ) {
1803                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1804                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1805                 {
1806                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1807                 }
1808         } else {
1809                 rc = LDAP_SUCCESS;
1810         }
1811
1812         return rc;
1813 }
1814
1815 static void call_group_postop_plugins( Operation *op )
1816 {
1817         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1818 }
1819 #endif /* LDAP_SLAPI */
1820