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 Backend *
 589 select_backend(
 590         struct berval * dn,
 591         int manageDSAit,
 592         int noSubs )
 593 {
 594         int             i, j;
 595         ber_len_t       len, dnlen = dn->bv_len;
 596         Backend         *be = NULL;
 597
 598         for ( i = 0; i < nbackends; i++ ) {
 599                 if ( backends[i].be_nsuffix == NULL ) {
 600                         continue;
 601                 }
 602
 603                 for ( j = 0; !BER_BVISNULL( &backends[i].be_nsuffix[j] ); j++ )
 604                 {
 605                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 606                                 && noSubs )
 607                         {
 608                                 continue;
 609                         }
 610
 611                         len = backends[i].be_nsuffix[j].bv_len;
 612
 613                         if ( len > dnlen ) {
 614                                 /* suffix is longer than DN */
 615                                 continue;
 616                         }
 617
 618                         /*
 619                          * input DN is normalized, so the separator check
 620                          * need not look at escaping
 621                          */
 622                         if ( len && len < dnlen &&
 623                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 624                         {
 625                                 continue;
 626                         }
 627
 628                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 629                                 &dn->bv_val[dnlen-len] ) == 0 )
 630                         {
 631                                 if( be == NULL ) {
 632                                         be = &backends[i];
 633
 634                                         if( manageDSAit && len == dnlen &&
 635                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 636                                                 continue;
 637                                         }
 638                                 } else {
 639                                         be = &backends[i];
 640                                 }
 641                                 return be;
 642                         }
 643                 }
 644         }
 645
 646         return be;
 647 }
 648
 649 int
 650 be_issuffix(
 651     Backend *be,
 652     struct berval *bvsuffix )
 653 {
 654         int     i;
 655
 656         if ( be->be_nsuffix == NULL ) {
 657                 return 0;
 658         }
 659
 660         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 661                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 662                         return 1;
 663                 }
 664         }
 665
 666         return 0;
 667 }
 668
 669 int
 670 be_isroot_dn( Backend *be, struct berval *ndn )
 671 {
 672         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 673                 return 0;
 674         }
 675
 676         return dn_match( &be->be_rootndn, ndn );
 677 }
 678
 679 int
 680 be_slurp_update( Operation *op )
 681 {
 682         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 683                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 684 }
 685
 686 int
 687 be_shadow_update( Operation *op )
 688 {
 689         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 690                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 691 }
 692
 693 int
 694 be_isupdate_dn( Backend *be, struct berval *ndn )
 695 {
 696         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 697                 return 0;
 698         }
 699
 700         return dn_match( &be->be_update_ndn, ndn );
 701 }
 702
 703 struct berval *
 704 be_root_dn( Backend *be )
 705 {
 706         return &be->be_rootdn;
 707 }
 708
 709 int
 710 be_isroot( Operation *op )
 711 {
 712         return be_isroot_dn( op->o_bd, &op->o_ndn );
 713 }
 714
 715 int
 716 be_isroot_pw( Operation *op )
 717 {
 718         int result;
 719
 720         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 721                 return 0;
 722         }
 723
 724         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 725                 return 0;
 726         }
 727
 728 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 729         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 730 #ifdef SLAPD_SPASSWD
 731         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 732 #endif
 733 #endif
 734
 735         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 736
 737 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 738 #ifdef SLAPD_SPASSWD
 739         lutil_passwd_sasl_conn = NULL;
 740 #endif
 741         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 742 #endif
 743
 744         return result == 0;
 745 }
 746
 747 int
 748 be_entry_release_rw(
 749         Operation *op,
 750         Entry *e,
 751         int rw )
 752 {
 753         if ( op->o_bd->be_release ) {
 754                 /* free and release entry from backend */
 755                 return op->o_bd->be_release( op, e, rw );
 756         } else {
 757                 /* free entry */
 758                 entry_free( e );
 759                 return 0;
 760         }
 761 }
 762
 763 int
 764 backend_unbind( Operation *op, SlapReply *rs )
 765 {
 766         int             i;
 767
 768         for ( i = 0; i < nbackends; i++ ) {
 769 #if defined( LDAP_SLAPI )
 770                 if ( op->o_pb ) {
 771                         int rc;
 772                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 773                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
 774                         rc = slapi_int_call_plugins( &backends[i],
 775                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 776                         if ( rc < 0 ) {
 777                                 /*
 778                                  * A preoperation plugin failure will abort the
 779                                  * entire operation.
 780                                  */
 781                                 Debug(LDAP_DEBUG_TRACE,
 782                                         "do_bind: Unbind preoperation plugin failed\n",
 783                                         0, 0, 0);
 784                                 return 0;
 785                         }
 786                 }
 787 #endif /* defined( LDAP_SLAPI ) */
 788
 789                 if ( backends[i].be_unbind ) {
 790                         op->o_bd = &backends[i];
 791                         (*backends[i].be_unbind)( op, rs );
 792                 }
 793
 794 #if defined( LDAP_SLAPI )
 795                 if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
 796                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 797                 {
 798                         Debug(LDAP_DEBUG_TRACE,
 799                                 "do_unbind: Unbind postoperation plugins failed\n",
 800                                 0, 0, 0);
 801                 }
 802 #endif /* defined( LDAP_SLAPI ) */
 803         }
 804
 805         return 0;
 806 }
 807
 808 int
 809 backend_connection_init(
 810         Connection   *conn )
 811 {
 812         int     i;
 813
 814         for ( i = 0; i < nbackends; i++ ) {
 815                 if ( backends[i].be_connection_init ) {
 816                         (*backends[i].be_connection_init)( &backends[i], conn);
 817                 }
 818         }
 819
 820         return 0;
 821 }
 822
 823 int
 824 backend_connection_destroy(
 825         Connection   *conn )
 826 {
 827         int     i;
 828
 829         for ( i = 0; i < nbackends; i++ ) {
 830                 if ( backends[i].be_connection_destroy ) {
 831                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 832                 }
 833         }
 834
 835         return 0;
 836 }
 837
 838 static int
 839 backend_check_controls(
 840         Operation *op,
 841         SlapReply *rs )
 842 {
 843         LDAPControl **ctrls = op->o_ctrls;
 844         rs->sr_err = LDAP_SUCCESS;
 845
 846         if( ctrls ) {
 847                 for( ; *ctrls != NULL ; ctrls++ ) {
 848                         /* KLUDGE: ldctl_iscritical munged by controls.c:get_ctrls()
 849                          * to ensure this check is enabled/disabled appropriately.
 850                          */
 851                         if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
 852                                 op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
 853                         {
 854                                 /* Per RFC 2251 (and LDAPBIS discussions), if the control
 855                                  * is recognized and appropriate for the operation (which
 856                                  * we've already verified), then the server should make
 857                                  * use of the control when performing the operation.
 858                                  *
 859                                  * Here we find that operation extended by the control
 860                                  * is not unavailable in a particular context, hence the
 861                                  * return of unwillingToPerform.
 862                                  */
 863                                 rs->sr_text = "control unavailable in context";
 864                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 865                                 break;
 866                         }
 867                 }
 868         }
 869
 870         return rs->sr_err;
 871 }
 872
 873 int
 874 backend_check_restrictions(
 875         Operation *op,
 876         SlapReply *rs,
 877         struct berval *opdata )
 878 {
 879         slap_mask_t restrictops;
 880         slap_mask_t requires;
 881         slap_mask_t opflag;
 882         slap_mask_t exopflag = 0;
 883         slap_ssf_set_t *ssf;
 884         int updateop = 0;
 885         int starttls = 0;
 886         int session = 0;
 887
 888         if( op->o_bd ) {
 889                 if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
 890                         return rs->sr_err;
 891                 }
 892
 893                 restrictops = op->o_bd->be_restrictops;
 894                 requires = op->o_bd->be_requires;
 895                 ssf = &op->o_bd->be_ssf_set;
 896
 897         } else {
 898                 restrictops = frontendDB->be_restrictops;
 899                 requires = frontendDB->be_requires;
 900                 ssf = &frontendDB->be_ssf_set;
 901         }
 902
 903         switch( op->o_tag ) {
 904         case LDAP_REQ_ADD:
 905                 opflag = SLAP_RESTRICT_OP_ADD;
 906                 updateop++;
 907                 break;
 908         case LDAP_REQ_BIND:
 909                 opflag = SLAP_RESTRICT_OP_BIND;
 910                 session++;
 911                 break;
 912         case LDAP_REQ_COMPARE:
 913                 opflag = SLAP_RESTRICT_OP_COMPARE;
 914                 break;
 915         case LDAP_REQ_DELETE:
 916                 updateop++;
 917                 opflag = SLAP_RESTRICT_OP_DELETE;
 918                 break;
 919         case LDAP_REQ_EXTENDED:
 920                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 921
 922                 if( !opdata ) {
 923                         /* treat unspecified as a modify */
 924                         opflag = SLAP_RESTRICT_OP_MODIFY;
 925                         updateop++;
 926                         break;
 927                 }
 928
 929                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 930                         session++;
 931                         starttls++;
 932                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 933                         break;
 934                 }
 935
 936                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 937                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 938                         break;
 939                 }
 940
 941                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 942                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 943                         break;
 944                 }
 945
 946                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 947                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 948                         updateop++;
 949                         break;
 950                 }
 951
 952                 /* treat everything else as a modify */
 953                 opflag = SLAP_RESTRICT_OP_MODIFY;
 954                 updateop++;
 955                 break;
 956
 957         case LDAP_REQ_MODIFY:
 958                 updateop++;
 959                 opflag = SLAP_RESTRICT_OP_MODIFY;
 960                 break;
 961         case LDAP_REQ_RENAME:
 962                 updateop++;
 963                 opflag = SLAP_RESTRICT_OP_RENAME;
 964                 break;
 965         case LDAP_REQ_SEARCH:
 966                 opflag = SLAP_RESTRICT_OP_SEARCH;
 967                 break;
 968         case LDAP_REQ_UNBIND:
 969                 session++;
 970                 opflag = 0;
 971                 break;
 972         default:
 973                 rs->sr_text = "restrict operations internal error";
 974                 rs->sr_err = LDAP_OTHER;
 975                 return rs->sr_err;
 976         }
 977
 978         if ( !starttls ) {
 979                 /* these checks don't apply to StartTLS */
 980
 981                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 982                 if( op->o_transport_ssf < ssf->sss_transport ) {
 983                         rs->sr_text = op->o_transport_ssf
 984                                 ? "stronger transport confidentiality required"
 985                                 : "transport confidentiality required";
 986                         return rs->sr_err;
 987                 }
 988
 989                 if( op->o_tls_ssf < ssf->sss_tls ) {
 990                         rs->sr_text = op->o_tls_ssf
 991                                 ? "stronger TLS confidentiality required"
 992                                 : "TLS confidentiality required";
 993                         return rs->sr_err;
 994                 }
 995
 996
 997                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 998                         /* simple bind specific check */
 999                         if( op->o_ssf < ssf->sss_simple_bind ) {
1000                                 rs->sr_text = op->o_ssf
1001                                         ? "stronger confidentiality required"
1002                                         : "confidentiality required";
1003                                 return rs->sr_err;
1004                         }
1005                 }
1006
1007                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1008                         /* these checks don't apply to SASL bind */
1009
1010                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1011                                 rs->sr_text = op->o_sasl_ssf
1012                                         ? "stronger SASL confidentiality required"
1013                                         : "SASL confidentiality required";
1014                                 return rs->sr_err;
1015                         }
1016
1017                         if( op->o_ssf < ssf->sss_ssf ) {
1018                                 rs->sr_text = op->o_ssf
1019                                         ? "stronger confidentiality required"
1020                                         : "confidentiality required";
1021                                 return rs->sr_err;
1022                         }
1023                 }
1024
1025                 if( updateop ) {
1026                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1027                                 rs->sr_text = op->o_transport_ssf
1028                                         ? "stronger transport confidentiality required for update"
1029                                         : "transport confidentiality required for update";
1030                                 return rs->sr_err;
1031                         }
1032
1033                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1034                                 rs->sr_text = op->o_tls_ssf
1035                                         ? "stronger TLS confidentiality required for update"
1036                                         : "TLS confidentiality required for update";
1037                                 return rs->sr_err;
1038                         }
1039
1040                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1041                                 rs->sr_text = op->o_sasl_ssf
1042                                         ? "stronger SASL confidentiality required for update"
1043                                         : "SASL confidentiality required for update";
1044                                 return rs->sr_err;
1045                         }
1046
1047                         if( op->o_ssf < ssf->sss_update_ssf ) {
1048                                 rs->sr_text = op->o_ssf
1049                                         ? "stronger confidentiality required for update"
1050                                         : "confidentiality required for update";
1051                                 return rs->sr_err;
1052                         }
1053
1054                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1055                                 BER_BVISEMPTY( &op->o_ndn ) )
1056                         {
1057                                 rs->sr_text = "modifications require authentication";
1058                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1059                                 return rs->sr_err;
1060                         }
1061
1062 #ifdef SLAP_X_LISTENER_MOD
1063                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) ? S_IWUSR : S_IWOTH ) ) ) {
1064                                 /* no "w" mode means readonly */
1065                                 rs->sr_text = "modifications not allowed on this listener";
1066                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1067                                 return rs->sr_err;
1068                         }
1069 #endif /* SLAP_X_LISTENER_MOD */
1070                 }
1071         }
1072
1073         if ( !session ) {
1074                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1075
1076                 if( requires & SLAP_REQUIRE_STRONG ) {
1077                         /* should check mechanism */
1078                         if( ( op->o_transport_ssf < ssf->sss_transport
1079                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1080                                 || BER_BVISEMPTY( &op->o_dn ) )
1081                         {
1082                                 rs->sr_text = "strong(er) authentication required";
1083                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1084                                 return rs->sr_err;
1085                         }
1086                 }
1087
1088                 if( requires & SLAP_REQUIRE_SASL ) {
1089                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1090                                 rs->sr_text = "SASL authentication required";
1091                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1092                                 return rs->sr_err;
1093                         }
1094                 }
1095
1096                 if( requires & SLAP_REQUIRE_AUTHC ) {
1097                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1098                                 rs->sr_text = "authentication required";
1099                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1100                                 return rs->sr_err;
1101                         }
1102                 }
1103
1104                 if( requires & SLAP_REQUIRE_BIND ) {
1105                         int version;
1106                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1107                         version = op->o_conn->c_protocol;
1108                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1109
1110                         if( !version ) {
1111                                 /* no bind has occurred */
1112                                 rs->sr_text = "BIND required";
1113                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1114                                 return rs->sr_err;
1115                         }
1116                 }
1117
1118                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1119                         if( op->o_protocol < LDAP_VERSION3 ) {
1120                                 /* no bind has occurred */
1121                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1122                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1123                                 return rs->sr_err;
1124                         }
1125                 }
1126
1127 #ifdef SLAP_X_LISTENER_MOD
1128                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1129                         if ( op->o_conn->c_listener &&
1130                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1131                 {
1132                                 /* no "x" mode means bind required */
1133                                 rs->sr_text = "bind required on this listener";
1134                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1135                                 return rs->sr_err;
1136                         }
1137                 }
1138
1139                 if ( !starttls && !updateop ) {
1140                         if ( op->o_conn->c_listener &&
1141                                 !( op->o_conn->c_listener->sl_perms &
1142                                         ( !BER_BVISEMPTY( &op->o_dn ) ? S_IRUSR : S_IROTH )))
1143                         {
1144                                 /* no "r" mode means no read */
1145                                 rs->sr_text = "read not allowed on this listener";
1146                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1147                                 return rs->sr_err;
1148                         }
1149                 }
1150 #endif /* SLAP_X_LISTENER_MOD */
1151
1152         }
1153
1154         if( ( restrictops & opflag )
1155                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1156                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1157                         rs->sr_text = "read operations restricted";
1158                 } else if ( restrictops & exopflag ) {
1159                         rs->sr_text = "extended operation restricted";
1160                 } else {
1161                         rs->sr_text = "operation restricted";
1162                 }
1163                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1164                 return rs->sr_err;
1165         }
1166
1167         rs->sr_err = LDAP_SUCCESS;
1168         return rs->sr_err;
1169 }
1170
1171 int backend_check_referrals( Operation *op, SlapReply *rs )
1172 {
1173         rs->sr_err = LDAP_SUCCESS;
1174
1175         if( op->o_bd->be_chk_referrals ) {
1176                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1177
1178                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1179                         send_ldap_result( op, rs );
1180                 }
1181         }
1182
1183         return rs->sr_err;
1184 }
1185
1186 int
1187 be_entry_get_rw(
1188         Operation *op,
1189         struct berval *ndn,
1190         ObjectClass *oc,
1191         AttributeDescription *at,
1192         int rw,
1193         Entry **e )
1194 {
1195         int rc;
1196
1197         *e = NULL;
1198
1199         if (op->o_bd == NULL) {
1200                 rc = LDAP_NO_SUCH_OBJECT;
1201         } else if ( op->o_bd->be_fetch ) {
1202                 rc = ( op->o_bd->be_fetch )( op, ndn,
1203                         oc, at, rw, e );
1204         } else {
1205                 rc = LDAP_UNWILLING_TO_PERFORM;
1206         }
1207         return rc;
1208 }
1209
1210 int
1211 backend_group(
1212         Operation *op,
1213         Entry   *target,
1214         struct berval *gr_ndn,
1215         struct berval *op_ndn,
1216         ObjectClass *group_oc,
1217         AttributeDescription *group_at )
1218 {
1219         Entry *e;
1220         Attribute *a;
1221         int rc;
1222         GroupAssertion *g;
1223         Backend *be = op->o_bd;
1224
1225         if ( op->o_abandon ) return SLAPD_ABANDON;
1226
1227         op->o_bd = select_backend( gr_ndn, 0, 0 );
1228
1229         for ( g = op->o_groups; g; g = g->ga_next ) {
1230                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1231                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1232                 {
1233                         continue;
1234                 }
1235                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1236                         break;
1237                 }
1238         }
1239
1240         if ( g ) {
1241                 rc = g->ga_res;
1242                 goto done;
1243         }
1244
1245         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1246                 e = target;
1247                 rc = 0;
1248         } else {
1249                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1250         }
1251         if ( e ) {
1252 #ifdef LDAP_SLAPI
1253                 if ( op->o_pb != NULL ) {
1254                         init_group_pblock( op, target, e, op_ndn, group_at );
1255
1256                         rc = call_group_preop_plugins( op );
1257                         if ( rc == LDAP_SUCCESS ) {
1258                                 goto done;
1259                         }
1260                 }
1261 #endif /* LDAP_SLAPI */
1262
1263                 a = attr_find( e->e_attrs, group_at );
1264                 if ( a ) {
1265                         /* If the attribute is a subtype of labeledURI, treat this as
1266                          * a dynamic group ala groupOfURLs
1267                          */
1268                         if (is_at_subtype( group_at->ad_type,
1269                                 slap_schema.si_ad_labeledURI->ad_type ) )
1270                         {
1271                                 int i;
1272                                 LDAPURLDesc *ludp;
1273                                 struct berval bv, nbase;
1274                                 Filter *filter;
1275                                 Entry *user;
1276                                 Backend *b2 = op->o_bd;
1277
1278                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1279                                         user = target;
1280                                 } else {
1281                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1282                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1283                                 }
1284
1285                                 if ( rc == 0 ) {
1286                                         rc = 1;
1287                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1288                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1289                                                         LDAP_URL_SUCCESS )
1290                                                 {
1291                                                         continue;
1292                                                 }
1293                                                 BER_BVZERO( &nbase );
1294                                                 /* host part must be empty */
1295                                                 /* attrs and extensions parts must be empty */
1296                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1297                                                         ludp->lud_attrs || ludp->lud_exts )
1298                                                 {
1299                                                         goto loopit;
1300                                                 }
1301                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1302                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1303                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1304                                                 {
1305                                                         goto loopit;
1306                                                 }
1307                                                 switch ( ludp->lud_scope ) {
1308                                                 case LDAP_SCOPE_BASE:
1309                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1310                                                                 goto loopit;
1311                                                         }
1312                                                         break;
1313                                                 case LDAP_SCOPE_ONELEVEL:
1314                                                         dnParent( op_ndn, &bv );
1315                                                         if ( !dn_match( &nbase, &bv ) ) {
1316                                                                 goto loopit;
1317                                                         }
1318                                                         break;
1319                                                 case LDAP_SCOPE_SUBTREE:
1320                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1321                                                                 goto loopit;
1322                                                         }
1323                                                         break;
1324 #ifdef LDAP_SCOPE_SUBORDINATE
1325                                                 case LDAP_SCOPE_SUBORDINATE:
1326                                                         if ( dn_match( &nbase, op_ndn ) ||
1327                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1328                                                         {
1329                                                                 goto loopit;
1330                                                         }
1331 #endif
1332                                                 }
1333                                                 filter = str2filter_x( op, ludp->lud_filter );
1334                                                 if ( filter ) {
1335                                                         if ( test_filter( NULL, user, filter ) ==
1336                                                                 LDAP_COMPARE_TRUE )
1337                                                         {
1338                                                                 rc = 0;
1339                                                         }
1340                                                         filter_free_x( op, filter );
1341                                                 }
1342 loopit:
1343                                                 ldap_free_urldesc( ludp );
1344                                                 if ( !BER_BVISNULL( &nbase ) ) {
1345                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1346                                                 }
1347                                                 if ( rc == 0 ) break;
1348                                         }
1349                                         if ( user != target ) {
1350                                                 be_entry_release_r( op, user );
1351                                         }
1352                                 }
1353                                 op->o_bd = b2;
1354                         } else {
1355                                 rc = value_find_ex( group_at,
1356                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1357                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1358                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1359                         }
1360                 } else {
1361                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1362                 }
1363                 if (e != target ) {
1364                         be_entry_release_r( op, e );
1365                 }
1366         } else {
1367                 rc = LDAP_NO_SUCH_OBJECT;
1368         }
1369
1370 #ifdef LDAP_SLAPI
1371         if ( op->o_pb ) call_group_postop_plugins( op );
1372 #endif /* LDAP_SLAPI */
1373
1374         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1375                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1376                         op->o_tmpmemctx );
1377                 g->ga_be = op->o_bd;
1378                 g->ga_oc = group_oc;
1379                 g->ga_at = group_at;
1380                 g->ga_res = rc;
1381                 g->ga_len = gr_ndn->bv_len;
1382                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1383                 g->ga_next = op->o_groups;
1384                 op->o_groups = g;
1385         }
1386 done:
1387         op->o_bd = be;
1388         return rc;
1389 }
1390
1391 #ifdef LDAP_SLAPI
1392 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1393 {
1394         BerVarray v;
1395         int rc;
1396         BerVarray *vals = (BerVarray *)c->cac_private;
1397         Operation *op = NULL;
1398         int i, j;
1399
1400         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1401         if ( op == NULL ) {
1402                 return 1;
1403         }
1404
1405         if ( op->o_conn && access_allowed( op,
1406                 e, a->a_desc, NULL, ACL_AUTH,
1407                 &c->cac_acl_state ) == 0 ) {
1408                 return 1;
1409         }
1410
1411         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) ;
1412
1413         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1414                 op->o_tmpmemctx );
1415         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1416                 if ( op->o_conn && access_allowed( op,
1417                         e, a->a_desc,
1418                         &a->a_nvals[i],
1419                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1420                         continue;
1421                 }
1422                 ber_dupbv_x( &v[j],
1423                         &a->a_nvals[i], op->o_tmpmemctx );
1424                 if ( !BER_BVISNULL( &v[j] ) ) {
1425                         j++;
1426                 }
1427         }
1428
1429         if ( j == 0 ) {
1430                 op->o_tmpfree( v, op->o_tmpmemctx );
1431                 *vals = NULL;
1432                 rc = 1;
1433         } else {
1434                 BER_BVZERO( &v[j] );
1435                 *vals = v;
1436                 rc = 0;
1437         }
1438
1439         return rc;
1440 }
1441 #endif /* LDAP_SLAPI */
1442
1443 int
1444 backend_attribute(
1445         Operation *op,
1446         Entry   *target,
1447         struct berval   *edn,
1448         AttributeDescription *entry_at,
1449         BerVarray *vals,
1450         slap_access_t access )
1451 {
1452         Entry                   *e = NULL;
1453         Attribute               *a = NULL;
1454         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1455         AccessControlState      acl_state = ACL_STATE_INIT;
1456         Backend                 *be = op->o_bd;
1457
1458         op->o_bd = select_backend( edn, 0, 0 );
1459
1460         if ( target && dn_match( &target->e_nname, edn ) ) {
1461                 e = target;
1462
1463         } else {
1464                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1465         }
1466
1467         if ( e ) {
1468                 a = attr_find( e->e_attrs, entry_at );
1469                 if ( a == NULL ) {
1470                         SlapReply       rs = { 0 };
1471                         AttributeName   anlist[ 2 ];
1472
1473                         anlist[ 0 ].an_name = entry_at->ad_cname;
1474                         anlist[ 0 ].an_desc = entry_at;
1475                         BER_BVZERO( &anlist[ 1 ].an_name );
1476                         rs.sr_attrs = anlist;
1477
1478                         rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1479
1480                         rc = backend_operational( op, &rs );
1481
1482                         if ( rc == LDAP_SUCCESS && rs.sr_operational_attrs ) {
1483                                 freeattr = 1;
1484                                 a = rs.sr_operational_attrs;
1485                         }
1486                 }
1487
1488                 if ( a ) {
1489                         BerVarray v;
1490
1491                         if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1492                                 e, entry_at, NULL, access,
1493                                 &acl_state ) == 0 ) {
1494                                 rc = LDAP_INSUFFICIENT_ACCESS;
1495                                 goto freeit;
1496                         }
1497
1498                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1499                                 ;
1500
1501                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1502                                 op->o_tmpmemctx );
1503                         for ( i = 0,j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1504                         {
1505                                 if ( op->o_conn && access > ACL_NONE &&
1506                                                 access_allowed( op, e,
1507                                                         entry_at,
1508                                                         &a->a_nvals[i],
1509                                                         access,
1510                                                         &acl_state ) == 0 )
1511                                 {
1512                                         continue;
1513                                 }
1514                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1515                                                 op->o_tmpmemctx );
1516                                 if ( !BER_BVISNULL( &v[j] ) ) {
1517                                         j++;
1518                                 }
1519                         }
1520                         if ( j == 0 ) {
1521                                 op->o_tmpfree( v, op->o_tmpmemctx );
1522                                 *vals = NULL;
1523                                 rc = LDAP_INSUFFICIENT_ACCESS;
1524
1525                         } else {
1526                                 BER_BVZERO( &v[j] );
1527                                 *vals = v;
1528                                 rc = LDAP_SUCCESS;
1529                         }
1530                 }
1531 #ifdef LDAP_SLAPI
1532                 else if ( op->o_pb ) {
1533                         /* try any computed attributes */
1534                         computed_attr_context   ctx;
1535
1536                         slapi_int_pblock_set_operation( op->o_pb, op );
1537
1538                         ctx.cac_pb = op->o_pb;
1539                         ctx.cac_attrs = NULL;
1540                         ctx.cac_userattrs = 0;
1541                         ctx.cac_opattrs = 0;
1542                         ctx.cac_acl_state = acl_state;
1543                         ctx.cac_private = (void *)vals;
1544
1545                         rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr );
1546                         if ( rc == 1 ) {
1547                                 rc = LDAP_INSUFFICIENT_ACCESS;
1548
1549                         } else {
1550                                 rc = LDAP_SUCCESS;
1551                         }
1552                 }
1553 #endif /* LDAP_SLAPI */
1554 freeit:         if ( e != target ) {
1555                         be_entry_release_r( op, e );
1556                 }
1557                 if ( freeattr ) {
1558                         attr_free( a );
1559                 }
1560         }
1561
1562         op->o_bd = be;
1563         return rc;
1564 }
1565
1566 int backend_operational(
1567         Operation *op,
1568         SlapReply *rs )
1569 {
1570         Attribute       **ap;
1571         int             rc = 0;
1572         BackendDB       *be_orig;
1573
1574         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1575                 /* just count them */ ;
1576
1577         /*
1578          * If operational attributes (allegedly) are required,
1579          * and the backend supports specific operational attributes,
1580          * add them to the attribute list
1581          */
1582         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
1583                 ad_inlist( slap_schema.si_ad_entryDN, op->ors_attrs )))
1584         {
1585                 *ap = slap_operational_entryDN( rs->sr_entry );
1586                 ap = &(*ap)->a_next;
1587         }
1588
1589         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
1590                 ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )))
1591         {
1592                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1593                 ap = &(*ap)->a_next;
1594         }
1595
1596         /* Let the overlays have a chance at this */
1597         be_orig = op->o_bd;
1598         if ( SLAP_ISOVERLAY( be_orig ))
1599                 op->o_bd = select_backend( be_orig->be_nsuffix, 0, 0 );
1600
1601         if (( SLAP_OPATTRS( rs->sr_attr_flags ) || op->ors_attrs ) &&
1602                 op->o_bd && op->o_bd->be_operational != NULL )
1603         {
1604                 Attribute       *a;
1605
1606                 a = rs->sr_operational_attrs;
1607                 rs->sr_operational_attrs = NULL;
1608                 rc = op->o_bd->be_operational( op, rs );
1609                 *ap = rs->sr_operational_attrs;
1610                 if ( a != NULL ) {
1611                         rs->sr_operational_attrs = a;
1612                 }
1613
1614                 for ( ; *ap; ap = &(*ap)->a_next )
1615                         /* just count them */ ;
1616         }
1617         op->o_bd = be_orig;
1618
1619         return rc;
1620 }
1621
1622 #ifdef LDAP_SLAPI
1623 static void init_group_pblock( Operation *op, Entry *target,
1624         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1625 {
1626         slapi_int_pblock_set_operation( op->o_pb, op );
1627
1628         slapi_pblock_set( op->o_pb,
1629                 SLAPI_X_GROUP_ENTRY, (void *)e );
1630         slapi_pblock_set( op->o_pb,
1631                 SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1632         slapi_pblock_set( op->o_pb,
1633                 SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1634         slapi_pblock_set( op->o_pb,
1635                 SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1636 }
1637
1638 static int call_group_preop_plugins( Operation *op )
1639 {
1640         int rc;
1641
1642         rc = slapi_int_call_plugins( op->o_bd,
1643                 SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1644         if ( rc < 0 ) {
1645                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1646                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1647                 {
1648                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1649                 }
1650         } else {
1651                 rc = LDAP_SUCCESS;
1652         }
1653
1654         return rc;
1655 }
1656
1657 static void call_group_postop_plugins( Operation *op )
1658 {
1659         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1660 }
1661 #endif /* LDAP_SLAPI */
1662