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
 169         assert(be);
 170
 171         be->be_pending_csn_list = (struct be_pcl *)
 172                 ch_calloc( 1, sizeof( struct be_pcl ));
 173
 174         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 175
 176         Debug( LDAP_DEBUG_TRACE,
 177                 "backend_startup: starting \"%s\"\n",
 178                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 179                 0, 0 );
 180         if ( be->bd_info->bi_db_open ) {
 181                 rc = be->bd_info->bi_db_open( be );
 182                 if ( rc != 0 ) {
 183                         Debug( LDAP_DEBUG_ANY,
 184                                 "backend_startup: bi_db_open failed! (%d)\n",
 185                                 rc, 0, 0 );
 186                 }
 187         }
 188         return rc;
 189 }
 190
 191 int backend_startup(Backend *be)
 192 {
 193         int i;
 194         int rc = 0;
 195
 196         if( ! ( nBackendDB > 0 ) ) {
 197                 /* no databases */
 198                 Debug( LDAP_DEBUG_ANY,
 199                         "backend_startup: %d databases to startup.\n",
 200                         nBackendDB, 0, 0 );
 201                 return 1;
 202         }
 203
 204         if(be != NULL) {
 205                 if ( be->bd_info->bi_open ) {
 206                         rc = be->bd_info->bi_open( be->bd_info );
 207                         if ( rc != 0 ) {
 208                                 Debug( LDAP_DEBUG_ANY,
 209                                         "backend_startup: bi_open failed!\n",
 210                                         0, 0, 0 );
 211
 212                                 return rc;
 213                         }
 214                 }
 215
 216                 return backend_startup_one( be );
 217         }
 218
 219         /* open frontend, if required */
 220         if ( frontendDB->bd_info->bi_db_open ) {
 221                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 222                 if ( rc != 0 ) {
 223                         Debug( LDAP_DEBUG_ANY,
 224                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 225                                 rc, 0, 0 );
 226                         return rc;
 227                 }
 228         }
 229
 230         /* open each backend type */
 231         for( i = 0; i < nBackendInfo; i++ ) {
 232                 if( backendInfo[i].bi_nDB == 0) {
 233                         /* no database of this type, don't open */
 234                         continue;
 235                 }
 236
 237                 if( backendInfo[i].bi_open ) {
 238                         rc = backendInfo[i].bi_open(
 239                                 &backendInfo[i] );
 240                         if ( rc != 0 ) {
 241                                 Debug( LDAP_DEBUG_ANY,
 242                                         "backend_startup: bi_open %d failed!\n",
 243                                         i, 0, 0 );
 244                                 return rc;
 245                         }
 246                 }
 247         }
 248
 249         ldap_pvt_thread_mutex_init( &slapd_rq.rq_mutex );
 250         LDAP_STAILQ_INIT( &slapd_rq.task_list );
 251         LDAP_STAILQ_INIT( &slapd_rq.run_list );
 252
 253         /* open each backend database */
 254         for( i = 0; i < nBackendDB; i++ ) {
 255                 if ( backendDB[i].be_suffix == NULL ) {
 256                         Debug( LDAP_DEBUG_ANY,
 257                                 "backend_startup: warning, database %d (%s) "
 258                                 "has no suffix\n",
 259                                 i, backendDB[i].bd_info->bi_type, 0 );
 260                 }
 261                 /* append global access controls */
 262                 acl_append( &backendDB[i].be_acl, frontendDB->be_acl );
 263
 264                 rc = backend_startup_one( &backendDB[i] );
 265
 266                 if ( rc ) return rc;
 267
 268
 269                 if ( backendDB[i].be_syncinfo ) {
 270                         syncinfo_t *si;
 271
 272                         if ( !( backendDB[i].be_search && backendDB[i].be_add &&
 273                                 backendDB[i].be_modify && backendDB[i].be_delete )) {
 274                                 Debug( LDAP_DEBUG_ANY,
 275                                         "backend_startup: database(%d) does not support "
 276                                         "operations required for syncrepl", i, 0, 0 );
 277                                 continue;
 278                         }
 279
 280                         {
 281                                 si = backendDB[i].be_syncinfo;
 282                                 si->si_be = &backendDB[i];
 283                                 init_syncrepl( si );
 284                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 285                                 ldap_pvt_runqueue_insert( &slapd_rq,
 286                                                 si->si_interval, do_syncrepl, (void *) si );
 287                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 288                         }
 289                 }
 290         }
 291
 292         return rc;
 293 }
 294
 295 int backend_num( Backend *be )
 296 {
 297         int i;
 298
 299         if( be == NULL ) return -1;
 300
 301         for( i = 0; i < nBackendDB; i++ ) {
 302                 if( be == &backendDB[i] ) return i;
 303         }
 304         return -1;
 305 }
 306
 307 int backend_shutdown( Backend *be )
 308 {
 309         int i;
 310         int rc = 0;
 311
 312         if( be != NULL ) {
 313                 /* shutdown a specific backend database */
 314
 315                 if ( be->bd_info->bi_nDB == 0 ) {
 316                         /* no database of this type, we never opened it */
 317                         return 0;
 318                 }
 319
 320                 if ( be->bd_info->bi_db_close ) {
 321                         be->bd_info->bi_db_close( be );
 322                 }
 323
 324                 if( be->bd_info->bi_close ) {
 325                         be->bd_info->bi_close( be->bd_info );
 326                 }
 327
 328                 return 0;
 329         }
 330
 331         /* close each backend database */
 332         for( i = 0; i < nBackendDB; i++ ) {
 333                 if ( backendDB[i].bd_info->bi_db_close ) {
 334                         backendDB[i].bd_info->bi_db_close(
 335                                 &backendDB[i] );
 336                 }
 337
 338                 if(rc != 0) {
 339                         Debug( LDAP_DEBUG_ANY,
 340                                 "backend_close: bi_db_close %s failed!\n",
 341                                 backendDB[i].be_type, 0, 0 );
 342                 }
 343         }
 344
 345         /* close each backend type */
 346         for( i = 0; i < nBackendInfo; i++ ) {
 347                 if( backendInfo[i].bi_nDB == 0 ) {
 348                         /* no database of this type */
 349                         continue;
 350                 }
 351
 352                 if( backendInfo[i].bi_close ) {
 353                         backendInfo[i].bi_close(
 354                                 &backendInfo[i] );
 355                 }
 356         }
 357
 358         /* close frontend, if required */
 359         if ( frontendDB->bd_info->bi_db_close ) {
 360                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 361                 if ( rc != 0 ) {
 362                         Debug( LDAP_DEBUG_ANY,
 363                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 364                                 rc, 0, 0 );
 365                 }
 366         }
 367
 368         return 0;
 369 }
 370
 371 int backend_destroy(void)
 372 {
 373         int i;
 374         BackendDB *bd;
 375         struct slap_csn_entry *csne;
 376
 377         ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
 378
 379         /* destroy each backend database */
 380         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 381
 382                 if ( bd->be_syncinfo ) {
 383                         syncinfo_free( bd->be_syncinfo );
 384                 }
 385
 386                 if ( bd->be_pending_csn_list ) {
 387                         csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 388                         while ( csne ) {
 389                                 struct slap_csn_entry *tmp_csne = csne;
 390
 391                                 LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 392                                 ch_free( csne->ce_csn.bv_val );
 393                                 csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 394                                 ch_free( tmp_csne );
 395                         }
 396                 }
 397
 398                 if ( bd->bd_info->bi_db_destroy ) {
 399                         bd->bd_info->bi_db_destroy( bd );
 400                 }
 401                 ber_bvarray_free( bd->be_suffix );
 402                 ber_bvarray_free( bd->be_nsuffix );
 403                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 404                         free( bd->be_rootdn.bv_val );
 405                 }
 406                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 407                         free( bd->be_rootndn.bv_val );
 408                 }
 409                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 410                         free( bd->be_rootpw.bv_val );
 411                 }
 412                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 413         }
 414         free( backendDB );
 415
 416         /* destroy each backend type */
 417         for( i = 0; i < nBackendInfo; i++ ) {
 418                 if( backendInfo[i].bi_destroy ) {
 419                         backendInfo[i].bi_destroy(
 420                                 &backendInfo[i] );
 421                 }
 422         }
 423
 424 #ifdef SLAPD_MODULES
 425         if (backendInfo != slap_binfo) {
 426            free(backendInfo);
 427         }
 428 #endif /* SLAPD_MODULES */
 429
 430         nBackendInfo = 0;
 431         backendInfo = NULL;
 432
 433         /* destroy frontend database */
 434         bd = frontendDB;
 435         if ( bd ) {
 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         }
 452
 453         return 0;
 454 }
 455
 456 BackendInfo* backend_info(const char *type)
 457 {
 458         int i;
 459
 460         /* search for the backend type */
 461         for( i = 0; i < nBackendInfo; i++ ) {
 462                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 463                         return &backendInfo[i];
 464                 }
 465         }
 466
 467         return NULL;
 468 }
 469
 470
 471 BackendDB *
 472 backend_db_init(
 473     const char  *type )
 474 {
 475         Backend *be;
 476         BackendInfo *bi = backend_info(type);
 477         int     rc = 0;
 478
 479         if( bi == NULL ) {
 480                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 481                 return NULL;
 482         }
 483
 484         be = backendDB;
 485
 486         backendDB = (BackendDB *) ch_realloc(
 487                         (char *) backendDB,
 488                     (nBackendDB + 1) * sizeof(Backend) );
 489
 490         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 491
 492         /* did realloc move our table? if so, fix up dependent pointers */
 493         if ( be != backendDB ) {
 494                 int i;
 495                 for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
 496                         be->be_pcl_mutexp = &be->be_pcl_mutex;
 497                 }
 498         }
 499
 500         be = &backends[nbackends++];
 501
 502         be->bd_info = bi;
 503         be->be_def_limit = frontendDB->be_def_limit;
 504         be->be_dfltaccess = frontendDB->be_dfltaccess;
 505
 506         be->be_restrictops = frontendDB->be_restrictops;
 507         be->be_requires = frontendDB->be_requires;
 508         be->be_ssf_set = frontendDB->be_ssf_set;
 509
 510         be->be_pcl_mutexp = &be->be_pcl_mutex;
 511         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 512
 513         /* assign a default depth limit for alias deref */
 514         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 515
 516         if(bi->bi_db_init) {
 517                 rc = bi->bi_db_init( be );
 518         }
 519
 520         if(rc != 0) {
 521                 fprintf( stderr, "database init failed (%s)\n", type );
 522                 nbackends--;
 523                 return NULL;
 524         }
 525
 526         bi->bi_nDB++;
 527         return( be );
 528 }
 529
 530 void
 531 be_db_close( void )
 532 {
 533         int     i;
 534
 535         for ( i = 0; i < nbackends; i++ ) {
 536                 if ( backends[i].bd_info->bi_db_close ) {
 537                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 538                 }
 539         }
 540
 541         if ( frontendDB->bd_info->bi_db_close ) {
 542                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 543         }
 544 }
 545
 546 Backend *
 547 select_backend(
 548         struct berval * dn,
 549         int manageDSAit,
 550         int noSubs )
 551 {
 552         int             i, j;
 553         ber_len_t       len, dnlen = dn->bv_len;
 554         Backend         *be = NULL;
 555
 556         for ( i = 0; i < nbackends; i++ ) {
 557                 if ( backends[i].be_nsuffix == NULL ) {
 558                         continue;
 559                 }
 560
 561                 for ( j = 0; !BER_BVISNULL( &backends[i].be_nsuffix[j] ); j++ )
 562                 {
 563                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 564                                 && noSubs )
 565                         {
 566                                 continue;
 567                         }
 568
 569                         len = backends[i].be_nsuffix[j].bv_len;
 570
 571                         if ( len > dnlen ) {
 572                                 /* suffix is longer than DN */
 573                                 continue;
 574                         }
 575
 576                         /*
 577                          * input DN is normalized, so the separator check
 578                          * need not look at escaping
 579                          */
 580                         if ( len && len < dnlen &&
 581                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 582                         {
 583                                 continue;
 584                         }
 585
 586                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 587                                 &dn->bv_val[dnlen-len] ) == 0 )
 588                         {
 589                                 if( be == NULL ) {
 590                                         be = &backends[i];
 591
 592                                         if( manageDSAit && len == dnlen &&
 593                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 594                                                 continue;
 595                                         }
 596                                 } else {
 597                                         be = &backends[i];
 598                                 }
 599                                 return be;
 600                         }
 601                 }
 602         }
 603
 604         return be;
 605 }
 606
 607 int
 608 be_issuffix(
 609     Backend *be,
 610     struct berval *bvsuffix )
 611 {
 612         int     i;
 613
 614         if ( be->be_nsuffix == NULL ) {
 615                 return 0;
 616         }
 617
 618         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 619                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 620                         return 1;
 621                 }
 622         }
 623
 624         return 0;
 625 }
 626
 627 int
 628 be_isroot_dn( Backend *be, struct berval *ndn )
 629 {
 630         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 631                 return 0;
 632         }
 633
 634         return dn_match( &be->be_rootndn, ndn );
 635 }
 636
 637 int
 638 be_slurp_update( Operation *op )
 639 {
 640         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 641                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 642 }
 643
 644 int
 645 be_shadow_update( Operation *op )
 646 {
 647         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 648                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 649 }
 650
 651 int
 652 be_isupdate_dn( Backend *be, struct berval *ndn )
 653 {
 654         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 655                 return 0;
 656         }
 657
 658         return dn_match( &be->be_update_ndn, ndn );
 659 }
 660
 661 struct berval *
 662 be_root_dn( Backend *be )
 663 {
 664         return &be->be_rootdn;
 665 }
 666
 667 int
 668 be_isroot( Operation *op )
 669 {
 670         return be_isroot_dn( op->o_bd, &op->o_ndn );
 671 }
 672
 673 int
 674 be_isroot_pw( Operation *op )
 675 {
 676         int result;
 677
 678         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 679                 return 0;
 680         }
 681
 682         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 683                 return 0;
 684         }
 685
 686 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 687         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 688 #ifdef SLAPD_SPASSWD
 689         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 690 #endif
 691 #endif
 692
 693         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 694
 695 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 696 #ifdef SLAPD_SPASSWD
 697         lutil_passwd_sasl_conn = NULL;
 698 #endif
 699         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 700 #endif
 701
 702         return result == 0;
 703 }
 704
 705 int
 706 be_entry_release_rw(
 707         Operation *op,
 708         Entry *e,
 709         int rw )
 710 {
 711         if ( op->o_bd->be_release ) {
 712                 /* free and release entry from backend */
 713                 return op->o_bd->be_release( op, e, rw );
 714         } else {
 715                 /* free entry */
 716                 entry_free( e );
 717                 return 0;
 718         }
 719 }
 720
 721 int
 722 backend_unbind( Operation *op, SlapReply *rs )
 723 {
 724         int             i;
 725
 726         for ( i = 0; i < nbackends; i++ ) {
 727 #if defined( LDAP_SLAPI )
 728                 if ( op->o_pb ) {
 729                         int rc;
 730                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 731                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
 732                         rc = slapi_int_call_plugins( &backends[i],
 733                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 734                         if ( rc < 0 ) {
 735                                 /*
 736                                  * A preoperation plugin failure will abort the
 737                                  * entire operation.
 738                                  */
 739                                 Debug(LDAP_DEBUG_TRACE,
 740                                         "do_bind: Unbind preoperation plugin failed\n",
 741                                         0, 0, 0);
 742                                 return 0;
 743                         }
 744                 }
 745 #endif /* defined( LDAP_SLAPI ) */
 746
 747                 if ( backends[i].be_unbind ) {
 748                         op->o_bd = &backends[i];
 749                         (*backends[i].be_unbind)( op, rs );
 750                 }
 751
 752 #if defined( LDAP_SLAPI )
 753                 if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
 754                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 755                 {
 756                         Debug(LDAP_DEBUG_TRACE,
 757                                 "do_unbind: Unbind postoperation plugins failed\n",
 758                                 0, 0, 0);
 759                 }
 760 #endif /* defined( LDAP_SLAPI ) */
 761         }
 762
 763         return 0;
 764 }
 765
 766 int
 767 backend_connection_init(
 768         Connection   *conn )
 769 {
 770         int     i;
 771
 772         for ( i = 0; i < nbackends; i++ ) {
 773                 if ( backends[i].be_connection_init ) {
 774                         (*backends[i].be_connection_init)( &backends[i], conn);
 775                 }
 776         }
 777
 778         return 0;
 779 }
 780
 781 int
 782 backend_connection_destroy(
 783         Connection   *conn )
 784 {
 785         int     i;
 786
 787         for ( i = 0; i < nbackends; i++ ) {
 788                 if ( backends[i].be_connection_destroy ) {
 789                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 790                 }
 791         }
 792
 793         return 0;
 794 }
 795
 796 static int
 797 backend_check_controls(
 798         Operation *op,
 799         SlapReply *rs )
 800 {
 801         LDAPControl **ctrls = op->o_ctrls;
 802         rs->sr_err = LDAP_SUCCESS;
 803
 804         if( ctrls ) {
 805                 for( ; *ctrls != NULL ; ctrls++ ) {
 806                         /* KLUDGE: ldctl_iscritical munged by controls.c:get_ctrls()
 807                          * to ensure this check is enabled/disabled appropriately.
 808                          */
 809                         if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
 810                                 op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
 811                         {
 812                                 /* Per RFC 2251 (and LDAPBIS discussions), if the control
 813                                  * is recognized and appropriate for the operation (which
 814                                  * we've already verified), then the server should make
 815                                  * use of the control when performing the operation.
 816                                  *
 817                                  * Here we find that operation extended by the control
 818                                  * is not unavailable in a particular context, hence the
 819                                  * return of unwillingToPerform.
 820                                  */
 821                                 rs->sr_text = "control unavailable in context";
 822                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 823                                 break;
 824                         }
 825                 }
 826         }
 827
 828         return rs->sr_err;
 829 }
 830
 831 int
 832 backend_check_restrictions(
 833         Operation *op,
 834         SlapReply *rs,
 835         struct berval *opdata )
 836 {
 837         slap_mask_t restrictops;
 838         slap_mask_t requires;
 839         slap_mask_t opflag;
 840         slap_mask_t exopflag = 0;
 841         slap_ssf_set_t *ssf;
 842         int updateop = 0;
 843         int starttls = 0;
 844         int session = 0;
 845
 846         if( op->o_bd ) {
 847                 if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
 848                         return rs->sr_err;
 849                 }
 850
 851                 restrictops = op->o_bd->be_restrictops;
 852                 requires = op->o_bd->be_requires;
 853                 ssf = &op->o_bd->be_ssf_set;
 854
 855         } else {
 856                 restrictops = frontendDB->be_restrictops;
 857                 requires = frontendDB->be_requires;
 858                 ssf = &frontendDB->be_ssf_set;
 859         }
 860
 861         switch( op->o_tag ) {
 862         case LDAP_REQ_ADD:
 863                 opflag = SLAP_RESTRICT_OP_ADD;
 864                 updateop++;
 865                 break;
 866         case LDAP_REQ_BIND:
 867                 opflag = SLAP_RESTRICT_OP_BIND;
 868                 session++;
 869                 break;
 870         case LDAP_REQ_COMPARE:
 871                 opflag = SLAP_RESTRICT_OP_COMPARE;
 872                 break;
 873         case LDAP_REQ_DELETE:
 874                 updateop++;
 875                 opflag = SLAP_RESTRICT_OP_DELETE;
 876                 break;
 877         case LDAP_REQ_EXTENDED:
 878                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 879
 880                 if( !opdata ) {
 881                         /* treat unspecified as a modify */
 882                         opflag = SLAP_RESTRICT_OP_MODIFY;
 883                         updateop++;
 884                         break;
 885                 }
 886
 887                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 888                         session++;
 889                         starttls++;
 890                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 891                         break;
 892                 }
 893
 894                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 895                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 896                         break;
 897                 }
 898
 899                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 900                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 901                         break;
 902                 }
 903
 904                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 905                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 906                         updateop++;
 907                         break;
 908                 }
 909
 910                 /* treat everything else as a modify */
 911                 opflag = SLAP_RESTRICT_OP_MODIFY;
 912                 updateop++;
 913                 break;
 914
 915         case LDAP_REQ_MODIFY:
 916                 updateop++;
 917                 opflag = SLAP_RESTRICT_OP_MODIFY;
 918                 break;
 919         case LDAP_REQ_RENAME:
 920                 updateop++;
 921                 opflag = SLAP_RESTRICT_OP_RENAME;
 922                 break;
 923         case LDAP_REQ_SEARCH:
 924                 opflag = SLAP_RESTRICT_OP_SEARCH;
 925                 break;
 926         case LDAP_REQ_UNBIND:
 927                 session++;
 928                 opflag = 0;
 929                 break;
 930         default:
 931                 rs->sr_text = "restrict operations internal error";
 932                 rs->sr_err = LDAP_OTHER;
 933                 return rs->sr_err;
 934         }
 935
 936         if ( !starttls ) {
 937                 /* these checks don't apply to StartTLS */
 938
 939                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 940                 if( op->o_transport_ssf < ssf->sss_transport ) {
 941                         rs->sr_text = op->o_transport_ssf
 942                                 ? "stronger transport confidentiality required"
 943                                 : "transport confidentiality required";
 944                         return rs->sr_err;
 945                 }
 946
 947                 if( op->o_tls_ssf < ssf->sss_tls ) {
 948                         rs->sr_text = op->o_tls_ssf
 949                                 ? "stronger TLS confidentiality required"
 950                                 : "TLS confidentiality required";
 951                         return rs->sr_err;
 952                 }
 953
 954
 955                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 956                         /* simple bind specific check */
 957                         if( op->o_ssf < ssf->sss_simple_bind ) {
 958                                 rs->sr_text = op->o_ssf
 959                                         ? "stronger confidentiality required"
 960                                         : "confidentiality required";
 961                                 return rs->sr_err;
 962                         }
 963                 }
 964
 965                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 966                         /* these checks don't apply to SASL bind */
 967
 968                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 969                                 rs->sr_text = op->o_sasl_ssf
 970                                         ? "stronger SASL confidentiality required"
 971                                         : "SASL confidentiality required";
 972                                 return rs->sr_err;
 973                         }
 974
 975                         if( op->o_ssf < ssf->sss_ssf ) {
 976                                 rs->sr_text = op->o_ssf
 977                                         ? "stronger confidentiality required"
 978                                         : "confidentiality required";
 979                                 return rs->sr_err;
 980                         }
 981                 }
 982
 983                 if( updateop ) {
 984                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 985                                 rs->sr_text = op->o_transport_ssf
 986                                         ? "stronger transport confidentiality required for update"
 987                                         : "transport confidentiality required for update";
 988                                 return rs->sr_err;
 989                         }
 990
 991                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 992                                 rs->sr_text = op->o_tls_ssf
 993                                         ? "stronger TLS confidentiality required for update"
 994                                         : "TLS confidentiality required for update";
 995                                 return rs->sr_err;
 996                         }
 997
 998                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 999                                 rs->sr_text = op->o_sasl_ssf
1000                                         ? "stronger SASL confidentiality required for update"
1001                                         : "SASL confidentiality required for update";
1002                                 return rs->sr_err;
1003                         }
1004
1005                         if( op->o_ssf < ssf->sss_update_ssf ) {
1006                                 rs->sr_text = op->o_ssf
1007                                         ? "stronger confidentiality required for update"
1008                                         : "confidentiality required for update";
1009                                 return rs->sr_err;
1010                         }
1011
1012                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1013                                 BER_BVISEMPTY( &op->o_ndn ) )
1014                         {
1015                                 rs->sr_text = "modifications require authentication";
1016                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1017                                 return rs->sr_err;
1018                         }
1019
1020 #ifdef SLAP_X_LISTENER_MOD
1021                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) ? S_IWUSR : S_IWOTH ) ) ) {
1022                                 /* no "w" mode means readonly */
1023                                 rs->sr_text = "modifications not allowed on this listener";
1024                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1025                                 return rs->sr_err;
1026                         }
1027 #endif /* SLAP_X_LISTENER_MOD */
1028                 }
1029         }
1030
1031         if ( !session ) {
1032                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1033
1034                 if( requires & SLAP_REQUIRE_STRONG ) {
1035                         /* should check mechanism */
1036                         if( ( op->o_transport_ssf < ssf->sss_transport
1037                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1038                                 || BER_BVISEMPTY( &op->o_dn ) )
1039                         {
1040                                 rs->sr_text = "strong(er) authentication required";
1041                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1042                                 return rs->sr_err;
1043                         }
1044                 }
1045
1046                 if( requires & SLAP_REQUIRE_SASL ) {
1047                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1048                                 rs->sr_text = "SASL authentication required";
1049                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1050                                 return rs->sr_err;
1051                         }
1052                 }
1053
1054                 if( requires & SLAP_REQUIRE_AUTHC ) {
1055                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1056                                 rs->sr_text = "authentication required";
1057                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1058                                 return rs->sr_err;
1059                         }
1060                 }
1061
1062                 if( requires & SLAP_REQUIRE_BIND ) {
1063                         int version;
1064                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1065                         version = op->o_conn->c_protocol;
1066                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1067
1068                         if( !version ) {
1069                                 /* no bind has occurred */
1070                                 rs->sr_text = "BIND required";
1071                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1072                                 return rs->sr_err;
1073                         }
1074                 }
1075
1076                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1077                         if( op->o_protocol < LDAP_VERSION3 ) {
1078                                 /* no bind has occurred */
1079                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1080                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1081                                 return rs->sr_err;
1082                         }
1083                 }
1084
1085 #ifdef SLAP_X_LISTENER_MOD
1086                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1087                         if ( op->o_conn->c_listener &&
1088                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1089                 {
1090                                 /* no "x" mode means bind required */
1091                                 rs->sr_text = "bind required on this listener";
1092                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1093                                 return rs->sr_err;
1094                         }
1095                 }
1096
1097                 if ( !starttls && !updateop ) {
1098                         if ( op->o_conn->c_listener &&
1099                                 !( op->o_conn->c_listener->sl_perms &
1100                                         ( !BER_BVISEMPTY( &op->o_dn ) ? S_IRUSR : S_IROTH )))
1101                         {
1102                                 /* no "r" mode means no read */
1103                                 rs->sr_text = "read not allowed on this listener";
1104                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1105                                 return rs->sr_err;
1106                         }
1107                 }
1108 #endif /* SLAP_X_LISTENER_MOD */
1109
1110         }
1111
1112         if( ( restrictops & opflag )
1113                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1114                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1115                         rs->sr_text = "read operations restricted";
1116                 } else if ( restrictops & exopflag ) {
1117                         rs->sr_text = "extended operation restricted";
1118                 } else {
1119                         rs->sr_text = "operation restricted";
1120                 }
1121                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1122                 return rs->sr_err;
1123         }
1124
1125         rs->sr_err = LDAP_SUCCESS;
1126         return rs->sr_err;
1127 }
1128
1129 int backend_check_referrals( Operation *op, SlapReply *rs )
1130 {
1131         rs->sr_err = LDAP_SUCCESS;
1132
1133         if( op->o_bd->be_chk_referrals ) {
1134                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1135
1136                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1137                         send_ldap_result( op, rs );
1138                 }
1139         }
1140
1141         return rs->sr_err;
1142 }
1143
1144 int
1145 be_entry_get_rw(
1146         Operation *op,
1147         struct berval *ndn,
1148         ObjectClass *oc,
1149         AttributeDescription *at,
1150         int rw,
1151         Entry **e )
1152 {
1153         int rc;
1154
1155         *e = NULL;
1156
1157         if (op->o_bd == NULL) {
1158                 rc = LDAP_NO_SUCH_OBJECT;
1159         } else if ( op->o_bd->be_fetch ) {
1160                 rc = ( op->o_bd->be_fetch )( op, ndn,
1161                         oc, at, rw, e );
1162         } else {
1163                 rc = LDAP_UNWILLING_TO_PERFORM;
1164         }
1165         return rc;
1166 }
1167
1168 int
1169 backend_group(
1170         Operation *op,
1171         Entry   *target,
1172         struct berval *gr_ndn,
1173         struct berval *op_ndn,
1174         ObjectClass *group_oc,
1175         AttributeDescription *group_at )
1176 {
1177         Entry *e;
1178         Attribute *a;
1179         int rc;
1180         GroupAssertion *g;
1181         Backend *be = op->o_bd;
1182
1183         if ( op->o_abandon ) return SLAPD_ABANDON;
1184
1185         op->o_bd = select_backend( gr_ndn, 0, 0 );
1186
1187         for ( g = op->o_groups; g; g = g->ga_next ) {
1188                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1189                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1190                 {
1191                         continue;
1192                 }
1193                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1194                         break;
1195                 }
1196         }
1197
1198         if ( g ) {
1199                 rc = g->ga_res;
1200                 goto done;
1201         }
1202
1203         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1204                 e = target;
1205                 rc = 0;
1206         } else {
1207                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1208         }
1209         if ( e ) {
1210 #ifdef LDAP_SLAPI
1211                 if ( op->o_pb != NULL ) {
1212                         init_group_pblock( op, target, e, op_ndn, group_at );
1213
1214                         rc = call_group_preop_plugins( op );
1215                         if ( rc == LDAP_SUCCESS ) {
1216                                 goto done;
1217                         }
1218                 }
1219 #endif /* LDAP_SLAPI */
1220
1221                 a = attr_find( e->e_attrs, group_at );
1222                 if ( a ) {
1223                         /* If the attribute is a subtype of labeledURI, treat this as
1224                          * a dynamic group ala groupOfURLs
1225                          */
1226                         if (is_at_subtype( group_at->ad_type,
1227                                 slap_schema.si_ad_labeledURI->ad_type ) )
1228                         {
1229                                 int i;
1230                                 LDAPURLDesc *ludp;
1231                                 struct berval bv, nbase;
1232                                 Filter *filter;
1233                                 Entry *user;
1234                                 Backend *b2 = op->o_bd;
1235
1236                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1237                                         user = target;
1238                                 } else {
1239                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1240                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1241                                 }
1242
1243                                 if ( rc == 0 ) {
1244                                         rc = 1;
1245                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1246                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1247                                                         LDAP_URL_SUCCESS )
1248                                                 {
1249                                                         continue;
1250                                                 }
1251                                                 BER_BVZERO( &nbase );
1252                                                 /* host part must be empty */
1253                                                 /* attrs and extensions parts must be empty */
1254                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1255                                                         ludp->lud_attrs || ludp->lud_exts )
1256                                                 {
1257                                                         goto loopit;
1258                                                 }
1259                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1260                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1261                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1262                                                 {
1263                                                         goto loopit;
1264                                                 }
1265                                                 switch ( ludp->lud_scope ) {
1266                                                 case LDAP_SCOPE_BASE:
1267                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1268                                                                 goto loopit;
1269                                                         }
1270                                                         break;
1271                                                 case LDAP_SCOPE_ONELEVEL:
1272                                                         dnParent( op_ndn, &bv );
1273                                                         if ( !dn_match( &nbase, &bv ) ) {
1274                                                                 goto loopit;
1275                                                         }
1276                                                         break;
1277                                                 case LDAP_SCOPE_SUBTREE:
1278                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1279                                                                 goto loopit;
1280                                                         }
1281                                                         break;
1282 #ifdef LDAP_SCOPE_SUBORDINATE
1283                                                 case LDAP_SCOPE_SUBORDINATE:
1284                                                         if ( dn_match( &nbase, op_ndn ) ||
1285                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1286                                                         {
1287                                                                 goto loopit;
1288                                                         }
1289 #endif
1290                                                 }
1291                                                 filter = str2filter_x( op, ludp->lud_filter );
1292                                                 if ( filter ) {
1293                                                         if ( test_filter( NULL, user, filter ) ==
1294                                                                 LDAP_COMPARE_TRUE )
1295                                                         {
1296                                                                 rc = 0;
1297                                                         }
1298                                                         filter_free_x( op, filter );
1299                                                 }
1300 loopit:
1301                                                 ldap_free_urldesc( ludp );
1302                                                 if ( !BER_BVISNULL( &nbase ) ) {
1303                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1304                                                 }
1305                                                 if ( rc == 0 ) break;
1306                                         }
1307                                         if ( user != target ) {
1308                                                 be_entry_release_r( op, user );
1309                                         }
1310                                 }
1311                                 op->o_bd = b2;
1312                         } else {
1313                                 rc = value_find_ex( group_at,
1314                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1315                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1316                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1317                         }
1318                 } else {
1319                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1320                 }
1321                 if (e != target ) {
1322                         be_entry_release_r( op, e );
1323                 }
1324         } else {
1325                 rc = LDAP_NO_SUCH_OBJECT;
1326         }
1327
1328 #ifdef LDAP_SLAPI
1329         if ( op->o_pb ) call_group_postop_plugins( op );
1330 #endif /* LDAP_SLAPI */
1331
1332         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1333                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1334                         op->o_tmpmemctx );
1335                 g->ga_be = op->o_bd;
1336                 g->ga_oc = group_oc;
1337                 g->ga_at = group_at;
1338                 g->ga_res = rc;
1339                 g->ga_len = gr_ndn->bv_len;
1340                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1341                 g->ga_next = op->o_groups;
1342                 op->o_groups = g;
1343         }
1344 done:
1345         op->o_bd = be;
1346         return rc;
1347 }
1348
1349 #ifdef LDAP_SLAPI
1350 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1351 {
1352         BerVarray v;
1353         int rc;
1354         BerVarray *vals = (BerVarray *)c->cac_private;
1355         Operation *op = NULL;
1356         int i, j;
1357
1358         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1359         if ( op == NULL ) {
1360                 return 1;
1361         }
1362
1363         if ( op->o_conn && access_allowed( op,
1364                 e, a->a_desc, NULL, ACL_AUTH,
1365                 &c->cac_acl_state ) == 0 ) {
1366                 return 1;
1367         }
1368
1369         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) ;
1370
1371         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1372                 op->o_tmpmemctx );
1373         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1374                 if ( op->o_conn && access_allowed( op,
1375                         e, a->a_desc,
1376                         &a->a_nvals[i],
1377                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1378                         continue;
1379                 }
1380                 ber_dupbv_x( &v[j],
1381                         &a->a_nvals[i], op->o_tmpmemctx );
1382                 if ( !BER_BVISNULL( &v[j] ) ) {
1383                         j++;
1384                 }
1385         }
1386
1387         if ( j == 0 ) {
1388                 op->o_tmpfree( v, op->o_tmpmemctx );
1389                 *vals = NULL;
1390                 rc = 1;
1391         } else {
1392                 BER_BVZERO( &v[j] );
1393                 *vals = v;
1394                 rc = 0;
1395         }
1396
1397         return rc;
1398 }
1399 #endif /* LDAP_SLAPI */
1400
1401 int
1402 backend_attribute(
1403         Operation *op,
1404         Entry   *target,
1405         struct berval   *edn,
1406         AttributeDescription *entry_at,
1407         BerVarray *vals,
1408         slap_access_t access )
1409 {
1410         Entry                   *e = NULL;
1411         Attribute               *a = NULL;
1412         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1413         AccessControlState      acl_state = ACL_STATE_INIT;
1414         Backend                 *be = op->o_bd;
1415
1416         op->o_bd = select_backend( edn, 0, 0 );
1417
1418         if ( target && dn_match( &target->e_nname, edn ) ) {
1419                 e = target;
1420
1421         } else {
1422                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1423         }
1424
1425         if ( e ) {
1426                 a = attr_find( e->e_attrs, entry_at );
1427                 if ( a == NULL ) {
1428                         SlapReply       rs = { 0 };
1429                         AttributeName   anlist[ 2 ];
1430
1431                         anlist[ 0 ].an_name = entry_at->ad_cname;
1432                         anlist[ 0 ].an_desc = entry_at;
1433                         BER_BVZERO( &anlist[ 1 ].an_name );
1434                         rs.sr_attrs = anlist;
1435
1436                         rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1437
1438                         rc = backend_operational( op, &rs );
1439
1440                         if ( rc == LDAP_SUCCESS && rs.sr_operational_attrs ) {
1441                                 freeattr = 1;
1442                                 a = rs.sr_operational_attrs;
1443                         }
1444                 }
1445
1446                 if ( a ) {
1447                         BerVarray v;
1448
1449                         if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1450                                 e, entry_at, NULL, access,
1451                                 &acl_state ) == 0 ) {
1452                                 rc = LDAP_INSUFFICIENT_ACCESS;
1453                                 goto freeit;
1454                         }
1455
1456                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1457                                 ;
1458
1459                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1460                                 op->o_tmpmemctx );
1461                         for ( i = 0,j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1462                         {
1463                                 if ( op->o_conn && access > ACL_NONE &&
1464                                                 access_allowed( op, e,
1465                                                         entry_at,
1466                                                         &a->a_nvals[i],
1467                                                         access,
1468                                                         &acl_state ) == 0 )
1469                                 {
1470                                         continue;
1471                                 }
1472                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1473                                                 op->o_tmpmemctx );
1474                                 if ( !BER_BVISNULL( &v[j] ) ) {
1475                                         j++;
1476                                 }
1477                         }
1478                         if ( j == 0 ) {
1479                                 op->o_tmpfree( v, op->o_tmpmemctx );
1480                                 *vals = NULL;
1481                                 rc = LDAP_INSUFFICIENT_ACCESS;
1482
1483                         } else {
1484                                 BER_BVZERO( &v[j] );
1485                                 *vals = v;
1486                                 rc = LDAP_SUCCESS;
1487                         }
1488                 }
1489 #ifdef LDAP_SLAPI
1490                 else if ( op->o_pb ) {
1491                         /* try any computed attributes */
1492                         computed_attr_context   ctx;
1493
1494                         slapi_int_pblock_set_operation( op->o_pb, op );
1495
1496                         ctx.cac_pb = op->o_pb;
1497                         ctx.cac_attrs = NULL;
1498                         ctx.cac_userattrs = 0;
1499                         ctx.cac_opattrs = 0;
1500                         ctx.cac_acl_state = acl_state;
1501                         ctx.cac_private = (void *)vals;
1502
1503                         rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr );
1504                         if ( rc == 1 ) {
1505                                 rc = LDAP_INSUFFICIENT_ACCESS;
1506
1507                         } else {
1508                                 rc = LDAP_SUCCESS;
1509                         }
1510                 }
1511 #endif /* LDAP_SLAPI */
1512 freeit:         if ( e != target ) {
1513                         be_entry_release_r( op, e );
1514                 }
1515                 if ( freeattr ) {
1516                         attr_free( a );
1517                 }
1518         }
1519
1520         op->o_bd = be;
1521         return rc;
1522 }
1523
1524 int backend_operational(
1525         Operation *op,
1526         SlapReply *rs )
1527 {
1528         Attribute       **ap;
1529         int             rc = 0;
1530         BackendDB       *be_orig;
1531
1532         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1533                 /* just count them */ ;
1534
1535         /*
1536          * If operational attributes (allegedly) are required,
1537          * and the backend supports specific operational attributes,
1538          * add them to the attribute list
1539          */
1540         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
1541                 ad_inlist( slap_schema.si_ad_entryDN, op->ors_attrs )))
1542         {
1543                 *ap = slap_operational_entryDN( rs->sr_entry );
1544                 ap = &(*ap)->a_next;
1545         }
1546
1547         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
1548                 ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )))
1549         {
1550                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1551                 ap = &(*ap)->a_next;
1552         }
1553
1554         /* Let the overlays have a chance at this */
1555         be_orig = op->o_bd;
1556         if ( SLAP_ISOVERLAY( be_orig ))
1557                 op->o_bd = select_backend( be_orig->be_nsuffix, 0, 0 );
1558
1559         if (( SLAP_OPATTRS( rs->sr_attr_flags ) || op->ors_attrs ) &&
1560                 op->o_bd && op->o_bd->be_operational != NULL )
1561         {
1562                 Attribute       *a;
1563
1564                 a = rs->sr_operational_attrs;
1565                 rs->sr_operational_attrs = NULL;
1566                 rc = op->o_bd->be_operational( op, rs );
1567                 *ap = rs->sr_operational_attrs;
1568                 if ( a != NULL ) {
1569                         rs->sr_operational_attrs = a;
1570                 }
1571
1572                 for ( ; *ap; ap = &(*ap)->a_next )
1573                         /* just count them */ ;
1574         }
1575         op->o_bd = be_orig;
1576
1577         return rc;
1578 }
1579
1580 #ifdef LDAP_SLAPI
1581 static void init_group_pblock( Operation *op, Entry *target,
1582         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1583 {
1584         slapi_int_pblock_set_operation( op->o_pb, op );
1585
1586         slapi_pblock_set( op->o_pb,
1587                 SLAPI_X_GROUP_ENTRY, (void *)e );
1588         slapi_pblock_set( op->o_pb,
1589                 SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1590         slapi_pblock_set( op->o_pb,
1591                 SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1592         slapi_pblock_set( op->o_pb,
1593                 SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1594 }
1595
1596 static int call_group_preop_plugins( Operation *op )
1597 {
1598         int rc;
1599
1600         rc = slapi_int_call_plugins( op->o_bd,
1601                 SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1602         if ( rc < 0 ) {
1603                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1604                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1605                 {
1606                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1607                 }
1608         } else {
1609                 rc = LDAP_SUCCESS;
1610         }
1611
1612         return rc;
1613 }
1614
1615 static void call_group_postop_plugins( Operation *op )
1616 {
1617         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1618 }
1619 #endif /* LDAP_SLAPI */
1620