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 static int
  66 backend_init_controls( BackendInfo *bi )
  67 {
  68         if ( bi->bi_controls ) {
  69                 int     i;
  70
  71                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  72                         int     cid;
  73
  74                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  75                                         == LDAP_CONTROL_NOT_FOUND )
  76                         {
  77                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  78                                         assert( 0 );
  79                                 }
  80
  81                                 return -1;
  82                         }
  83
  84                         bi->bi_ctrls[ cid ] = 1;
  85                 }
  86         }
  87
  88         return 0;
  89 }
  90
  91 int backend_init(void)
  92 {
  93         int rc = -1;
  94
  95         if((nBackendInfo != 0) || (backendInfo != NULL)) {
  96                 /* already initialized */
  97                 Debug( LDAP_DEBUG_ANY,
  98                         "backend_init: already initialized\n", 0, 0, 0 );
  99                 return -1;
 100         }
 101
 102         for( ;
 103                 slap_binfo[nBackendInfo].bi_type != NULL;
 104                 nBackendInfo++ )
 105         {
 106                 assert( slap_binfo[nBackendInfo].bi_init );
 107
 108                 rc = slap_binfo[nBackendInfo].bi_init( &slap_binfo[nBackendInfo] );
 109
 110                 if(rc != 0) {
 111                         Debug( LDAP_DEBUG_ANY,
 112                                 "backend_init: initialized for type \"%s\"\n",
 113                                 slap_binfo[nBackendInfo].bi_type, 0, 0 );
 114                         /* destroy those we've already inited */
 115                         for( nBackendInfo--;
 116                                 nBackendInfo >= 0 ;
 117                                 nBackendInfo-- )
 118                         {
 119                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 120                                         slap_binfo[nBackendInfo].bi_destroy(
 121                                                 &slap_binfo[nBackendInfo] );
 122                                 }
 123                         }
 124                         return rc;
 125                 }
 126         }
 127
 128         if ( nBackendInfo > 0) {
 129                 backendInfo = slap_binfo;
 130                 return 0;
 131         }
 132
 133 #ifdef SLAPD_MODULES
 134         return 0;
 135 #else
 136
 137         Debug( LDAP_DEBUG_ANY,
 138                 "backend_init: failed\n",
 139                 0, 0, 0 );
 140
 141         return rc;
 142 #endif /* SLAPD_MODULES */
 143 }
 144
 145 int backend_add(BackendInfo *aBackendInfo)
 146 {
 147         int rc = 0;
 148
 149         if ( aBackendInfo->bi_init == NULL ) {
 150                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 151                         "backend type \"%s\" does not have the (mandatory)init function\n",
 152                         aBackendInfo->bi_type, 0, 0 );
 153                 return -1;
 154         }
 155
 156         rc = aBackendInfo->bi_init(aBackendInfo);
 157         if ( rc != 0) {
 158                 Debug( LDAP_DEBUG_ANY,
 159                         "backend_add:  initialization for type \"%s\" failed\n",
 160                         aBackendInfo->bi_type, 0, 0 );
 161                 return rc;
 162         }
 163
 164         (void)backend_init_controls( aBackendInfo );
 165
 166         /* now add the backend type to the Backend Info List */
 167         {
 168                 BackendInfo *newBackendInfo = 0;
 169
 170                 /* if backendInfo == slap_binfo no deallocation of old backendInfo */
 171                 if (backendInfo == slap_binfo) {
 172                         newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 173                         AC_MEMCPY(newBackendInfo, backendInfo,
 174                                 sizeof(BackendInfo) * nBackendInfo);
 175                 } else {
 176                         newBackendInfo = ch_realloc(backendInfo,
 177                                 sizeof(BackendInfo) * (nBackendInfo + 1));
 178                 }
 179
 180                 AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 181                         sizeof(BackendInfo));
 182                 backendInfo = newBackendInfo;
 183                 nBackendInfo++;
 184                 return 0;
 185         }
 186 }
 187
 188 static int
 189 backend_set_controls( BackendDB *be )
 190 {
 191         BackendInfo     *bi = be->bd_info;
 192
 193         /* back-relay takes care of itself; so may do other */
 194         if ( overlay_is_over( be ) ) {
 195                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 196         }
 197
 198         if ( bi->bi_controls ) {
 199                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 200                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 201                                         sizeof( be->be_ctrls ) );
 202                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 203
 204                 } else {
 205                         int     i;
 206
 207                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 208                                 if ( bi->bi_ctrls[ i ] ) {
 209                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 210                                 }
 211                         }
 212                 }
 213
 214         }
 215
 216         return 0;
 217 }
 218
 219 /* startup a specific backend database */
 220 int backend_startup_one(Backend *be)
 221 {
 222         int             rc = 0;
 223
 224         assert( be );
 225
 226         be->be_pending_csn_list = (struct be_pcl *)
 227                 ch_calloc( 1, sizeof( struct be_pcl ));
 228
 229         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 230
 231         Debug( LDAP_DEBUG_TRACE,
 232                 "backend_startup_one: starting \"%s\"\n",
 233                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 234                 0, 0 );
 235
 236         /* set database controls */
 237         (void)backend_set_controls( be );
 238
 239         if ( be->bd_info->bi_db_open ) {
 240                 rc = be->bd_info->bi_db_open( be );
 241                 if ( rc == 0 ) {
 242                         (void)backend_set_controls( be );
 243
 244                 } else {
 245                         Debug( LDAP_DEBUG_ANY,
 246                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 247                                 rc, 0, 0 );
 248                 }
 249         }
 250
 251         return rc;
 252 }
 253
 254 int backend_startup(Backend *be)
 255 {
 256         int i;
 257         int rc = 0;
 258
 259         if( ! ( nBackendDB > 0 ) ) {
 260                 /* no databases */
 261                 Debug( LDAP_DEBUG_ANY,
 262                         "backend_startup: %d databases to startup.\n",
 263                         nBackendDB, 0, 0 );
 264                 return 1;
 265         }
 266
 267         if(be != NULL) {
 268                 if ( be->bd_info->bi_open ) {
 269                         rc = be->bd_info->bi_open( be->bd_info );
 270                         if ( rc != 0 ) {
 271                                 Debug( LDAP_DEBUG_ANY,
 272                                         "backend_startup: bi_open failed!\n",
 273                                         0, 0, 0 );
 274
 275                                 return rc;
 276                         }
 277                 }
 278
 279                 return backend_startup_one( be );
 280         }
 281
 282         /* open frontend, if required */
 283         if ( frontendDB->bd_info->bi_db_open ) {
 284                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 285                 if ( rc != 0 ) {
 286                         Debug( LDAP_DEBUG_ANY,
 287                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 288                                 rc, 0, 0 );
 289                         return rc;
 290                 }
 291         }
 292
 293         /* open each backend type */
 294         for( i = 0; i < nBackendInfo; i++ ) {
 295                 if( backendInfo[i].bi_nDB == 0) {
 296                         /* no database of this type, don't open */
 297                         continue;
 298                 }
 299
 300                 if( backendInfo[i].bi_open ) {
 301                         rc = backendInfo[i].bi_open( &backendInfo[i] );
 302                         if ( rc != 0 ) {
 303                                 Debug( LDAP_DEBUG_ANY,
 304                                         "backend_startup: bi_open %d failed!\n",
 305                                         i, 0, 0 );
 306                                 return rc;
 307                         }
 308                 }
 309
 310                 (void)backend_init_controls( &backendInfo[i] );
 311         }
 312
 313         ldap_pvt_thread_mutex_init( &slapd_rq.rq_mutex );
 314         LDAP_STAILQ_INIT( &slapd_rq.task_list );
 315         LDAP_STAILQ_INIT( &slapd_rq.run_list );
 316
 317         /* open each backend database */
 318         for( i = 0; i < nBackendDB; i++ ) {
 319                 if ( backendDB[i].be_suffix == NULL ) {
 320                         Debug( LDAP_DEBUG_ANY,
 321                                 "backend_startup: warning, database %d (%s) "
 322                                 "has no suffix\n",
 323                                 i, backendDB[i].bd_info->bi_type, 0 );
 324                 }
 325                 /* append global access controls */
 326                 acl_append( &backendDB[i].be_acl, frontendDB->be_acl );
 327
 328                 rc = backend_startup_one( &backendDB[i] );
 329
 330                 if ( rc ) return rc;
 331
 332
 333                 if ( backendDB[i].be_syncinfo ) {
 334                         syncinfo_t *si;
 335
 336                         if ( !( backendDB[i].be_search && backendDB[i].be_add &&
 337                                 backendDB[i].be_modify && backendDB[i].be_delete )) {
 338                                 Debug( LDAP_DEBUG_ANY,
 339                                         "backend_startup: database(%d) does not support "
 340                                         "operations required for syncrepl", i, 0, 0 );
 341                                 continue;
 342                         }
 343
 344                         {
 345                                 si = backendDB[i].be_syncinfo;
 346                                 si->si_be = &backendDB[i];
 347                                 init_syncrepl( si );
 348                                 ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
 349                                 ldap_pvt_runqueue_insert( &slapd_rq,
 350                                                 si->si_interval, do_syncrepl, (void *) si );
 351                                 ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
 352                         }
 353                 }
 354         }
 355
 356         return rc;
 357 }
 358
 359 int backend_num( Backend *be )
 360 {
 361         int i;
 362
 363         if( be == NULL ) return -1;
 364
 365         for( i = 0; i < nBackendDB; i++ ) {
 366                 if( be == &backendDB[i] ) return i;
 367         }
 368         return -1;
 369 }
 370
 371 int backend_shutdown( Backend *be )
 372 {
 373         int i;
 374         int rc = 0;
 375
 376         if( be != NULL ) {
 377                 /* shutdown a specific backend database */
 378
 379                 if ( be->bd_info->bi_nDB == 0 ) {
 380                         /* no database of this type, we never opened it */
 381                         return 0;
 382                 }
 383
 384                 if ( be->bd_info->bi_db_close ) {
 385                         be->bd_info->bi_db_close( be );
 386                 }
 387
 388                 if( be->bd_info->bi_close ) {
 389                         be->bd_info->bi_close( be->bd_info );
 390                 }
 391
 392                 return 0;
 393         }
 394
 395         /* close each backend database */
 396         for( i = 0; i < nBackendDB; i++ ) {
 397                 if ( backendDB[i].bd_info->bi_db_close ) {
 398                         backendDB[i].bd_info->bi_db_close(
 399                                 &backendDB[i] );
 400                 }
 401
 402                 if(rc != 0) {
 403                         Debug( LDAP_DEBUG_ANY,
 404                                 "backend_close: bi_db_close %s failed!\n",
 405                                 backendDB[i].be_type, 0, 0 );
 406                 }
 407         }
 408
 409         /* close each backend type */
 410         for( i = 0; i < nBackendInfo; i++ ) {
 411                 if( backendInfo[i].bi_nDB == 0 ) {
 412                         /* no database of this type */
 413                         continue;
 414                 }
 415
 416                 if( backendInfo[i].bi_close ) {
 417                         backendInfo[i].bi_close(
 418                                 &backendInfo[i] );
 419                 }
 420         }
 421
 422         /* close frontend, if required */
 423         if ( frontendDB->bd_info->bi_db_close ) {
 424                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 425                 if ( rc != 0 ) {
 426                         Debug( LDAP_DEBUG_ANY,
 427                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 428                                 rc, 0, 0 );
 429                 }
 430         }
 431
 432         return 0;
 433 }
 434
 435 int backend_destroy(void)
 436 {
 437         int i;
 438         BackendDB *bd;
 439         struct slap_csn_entry *csne;
 440
 441         /* destroy each backend database */
 442         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 443
 444                 if ( bd->be_syncinfo ) {
 445                         syncinfo_free( bd->be_syncinfo );
 446                 }
 447
 448                 if ( bd->be_pending_csn_list ) {
 449                         csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 450                         while ( csne ) {
 451                                 struct slap_csn_entry *tmp_csne = csne;
 452
 453                                 LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 454                                 ch_free( csne->ce_csn.bv_val );
 455                                 csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 456                                 ch_free( tmp_csne );
 457                         }
 458                 }
 459
 460                 if ( bd->bd_info->bi_db_destroy ) {
 461                         bd->bd_info->bi_db_destroy( bd );
 462                 }
 463                 ber_bvarray_free( bd->be_suffix );
 464                 ber_bvarray_free( bd->be_nsuffix );
 465                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 466                         free( bd->be_rootdn.bv_val );
 467                 }
 468                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 469                         free( bd->be_rootndn.bv_val );
 470                 }
 471                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 472                         free( bd->be_rootpw.bv_val );
 473                 }
 474                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 475         }
 476         free( backendDB );
 477
 478         /* destroy each backend type */
 479         for( i = 0; i < nBackendInfo; i++ ) {
 480                 if( backendInfo[i].bi_destroy ) {
 481                         backendInfo[i].bi_destroy(
 482                                 &backendInfo[i] );
 483                 }
 484         }
 485
 486 #ifdef SLAPD_MODULES
 487         if (backendInfo != slap_binfo) {
 488            free(backendInfo);
 489         }
 490 #endif /* SLAPD_MODULES */
 491
 492         nBackendInfo = 0;
 493         backendInfo = NULL;
 494
 495         /* destroy frontend database */
 496         bd = frontendDB;
 497         if ( bd ) {
 498                 if ( bd->bd_info->bi_db_destroy ) {
 499                         bd->bd_info->bi_db_destroy( bd );
 500                 }
 501                 ber_bvarray_free( bd->be_suffix );
 502                 ber_bvarray_free( bd->be_nsuffix );
 503                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 504                         free( bd->be_rootdn.bv_val );
 505                 }
 506                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 507                         free( bd->be_rootndn.bv_val );
 508                 }
 509                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 510                         free( bd->be_rootpw.bv_val );
 511                 }
 512                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 513         }
 514
 515         return 0;
 516 }
 517
 518 BackendInfo* backend_info(const char *type)
 519 {
 520         int i;
 521
 522         /* search for the backend type */
 523         for( i = 0; i < nBackendInfo; i++ ) {
 524                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 525                         return &backendInfo[i];
 526                 }
 527         }
 528
 529         return NULL;
 530 }
 531
 532
 533 BackendDB *
 534 backend_db_init(
 535     const char  *type )
 536 {
 537         Backend *be;
 538         BackendInfo *bi = backend_info(type);
 539         int     rc = 0;
 540
 541         if( bi == NULL ) {
 542                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 543                 return NULL;
 544         }
 545
 546         be = backendDB;
 547
 548         backendDB = (BackendDB *) ch_realloc(
 549                         (char *) backendDB,
 550                     (nBackendDB + 1) * sizeof(Backend) );
 551
 552         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 553
 554         /* did realloc move our table? if so, fix up dependent pointers */
 555         if ( be != backendDB ) {
 556                 int i;
 557                 for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
 558                         be->be_pcl_mutexp = &be->be_pcl_mutex;
 559                 }
 560         }
 561
 562         be = &backends[nbackends++];
 563
 564         be->bd_info = bi;
 565
 566         be->be_def_limit = frontendDB->be_def_limit;
 567         be->be_dfltaccess = frontendDB->be_dfltaccess;
 568
 569         be->be_restrictops = frontendDB->be_restrictops;
 570         be->be_requires = frontendDB->be_requires;
 571         be->be_ssf_set = frontendDB->be_ssf_set;
 572
 573         be->be_pcl_mutexp = &be->be_pcl_mutex;
 574         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 575
 576         /* assign a default depth limit for alias deref */
 577         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 578
 579         if ( bi->bi_db_init ) {
 580                 rc = bi->bi_db_init( be );
 581         }
 582
 583         if ( rc != 0 ) {
 584                 fprintf( stderr, "database init failed (%s)\n", type );
 585                 nbackends--;
 586                 return NULL;
 587         }
 588
 589         bi->bi_nDB++;
 590         return( be );
 591 }
 592
 593 void
 594 be_db_close( void )
 595 {
 596         int     i;
 597
 598         for ( i = 0; i < nbackends; i++ ) {
 599                 if ( backends[i].bd_info->bi_db_close ) {
 600                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 601                 }
 602         }
 603
 604         if ( frontendDB->bd_info->bi_db_close ) {
 605                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 606         }
 607
 608 }
 609
 610 Backend *
 611 select_backend(
 612         struct berval * dn,
 613         int manageDSAit,
 614         int noSubs )
 615 {
 616         int             i, j;
 617         ber_len_t       len, dnlen = dn->bv_len;
 618         Backend         *be = NULL;
 619
 620         for ( i = 0; i < nbackends; i++ ) {
 621                 if ( backends[i].be_nsuffix == NULL ) {
 622                         continue;
 623                 }
 624
 625                 for ( j = 0; !BER_BVISNULL( &backends[i].be_nsuffix[j] ); j++ )
 626                 {
 627                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 628                                 && noSubs )
 629                         {
 630                                 continue;
 631                         }
 632
 633                         len = backends[i].be_nsuffix[j].bv_len;
 634
 635                         if ( len > dnlen ) {
 636                                 /* suffix is longer than DN */
 637                                 continue;
 638                         }
 639
 640                         /*
 641                          * input DN is normalized, so the separator check
 642                          * need not look at escaping
 643                          */
 644                         if ( len && len < dnlen &&
 645                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 646                         {
 647                                 continue;
 648                         }
 649
 650                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 651                                 &dn->bv_val[dnlen-len] ) == 0 )
 652                         {
 653                                 if( be == NULL ) {
 654                                         be = &backends[i];
 655
 656                                         if( manageDSAit && len == dnlen &&
 657                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 658                                                 continue;
 659                                         }
 660                                 } else {
 661                                         be = &backends[i];
 662                                 }
 663                                 return be;
 664                         }
 665                 }
 666         }
 667
 668         return be;
 669 }
 670
 671 int
 672 be_issuffix(
 673     Backend *be,
 674     struct berval *bvsuffix )
 675 {
 676         int     i;
 677
 678         if ( be->be_nsuffix == NULL ) {
 679                 return 0;
 680         }
 681
 682         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 683                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 684                         return 1;
 685                 }
 686         }
 687
 688         return 0;
 689 }
 690
 691 int
 692 be_isroot_dn( Backend *be, struct berval *ndn )
 693 {
 694         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 695                 return 0;
 696         }
 697
 698         return dn_match( &be->be_rootndn, ndn );
 699 }
 700
 701 int
 702 be_slurp_update( Operation *op )
 703 {
 704         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 705                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 706 }
 707
 708 int
 709 be_shadow_update( Operation *op )
 710 {
 711         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 712                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 713 }
 714
 715 int
 716 be_isupdate_dn( Backend *be, struct berval *ndn )
 717 {
 718         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 719                 return 0;
 720         }
 721
 722         return dn_match( &be->be_update_ndn, ndn );
 723 }
 724
 725 struct berval *
 726 be_root_dn( Backend *be )
 727 {
 728         return &be->be_rootdn;
 729 }
 730
 731 int
 732 be_isroot( Operation *op )
 733 {
 734         return be_isroot_dn( op->o_bd, &op->o_ndn );
 735 }
 736
 737 int
 738 be_isroot_pw( Operation *op )
 739 {
 740         int result;
 741
 742         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 743                 return 0;
 744         }
 745
 746         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 747                 return 0;
 748         }
 749
 750 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 751         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 752 #ifdef SLAPD_SPASSWD
 753         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 754 #endif
 755 #endif
 756
 757         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 758
 759 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 760 #ifdef SLAPD_SPASSWD
 761         lutil_passwd_sasl_conn = NULL;
 762 #endif
 763         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 764 #endif
 765
 766         return result == 0;
 767 }
 768
 769 int
 770 be_entry_release_rw(
 771         Operation *op,
 772         Entry *e,
 773         int rw )
 774 {
 775         if ( op->o_bd->be_release ) {
 776                 /* free and release entry from backend */
 777                 return op->o_bd->be_release( op, e, rw );
 778         } else {
 779                 /* free entry */
 780                 entry_free( e );
 781                 return 0;
 782         }
 783 }
 784
 785 int
 786 backend_unbind( Operation *op, SlapReply *rs )
 787 {
 788         int             i;
 789
 790         for ( i = 0; i < nbackends; i++ ) {
 791 #if defined( LDAP_SLAPI )
 792                 if ( op->o_pb ) {
 793                         int rc;
 794                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 795                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
 796                         rc = slapi_int_call_plugins( &backends[i],
 797                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 798                         if ( rc < 0 ) {
 799                                 /*
 800                                  * A preoperation plugin failure will abort the
 801                                  * entire operation.
 802                                  */
 803                                 Debug(LDAP_DEBUG_TRACE,
 804                                         "do_bind: Unbind preoperation plugin failed\n",
 805                                         0, 0, 0);
 806                                 return 0;
 807                         }
 808                 }
 809 #endif /* defined( LDAP_SLAPI ) */
 810
 811                 if ( backends[i].be_unbind ) {
 812                         op->o_bd = &backends[i];
 813                         (*backends[i].be_unbind)( op, rs );
 814                 }
 815
 816 #if defined( LDAP_SLAPI )
 817                 if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
 818                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 819                 {
 820                         Debug(LDAP_DEBUG_TRACE,
 821                                 "do_unbind: Unbind postoperation plugins failed\n",
 822                                 0, 0, 0);
 823                 }
 824 #endif /* defined( LDAP_SLAPI ) */
 825         }
 826
 827         return 0;
 828 }
 829
 830 int
 831 backend_connection_init(
 832         Connection   *conn )
 833 {
 834         int     i;
 835
 836         for ( i = 0; i < nbackends; i++ ) {
 837                 if ( backends[i].be_connection_init ) {
 838                         (*backends[i].be_connection_init)( &backends[i], conn);
 839                 }
 840         }
 841
 842         return 0;
 843 }
 844
 845 int
 846 backend_connection_destroy(
 847         Connection   *conn )
 848 {
 849         int     i;
 850
 851         for ( i = 0; i < nbackends; i++ ) {
 852                 if ( backends[i].be_connection_destroy ) {
 853                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 854                 }
 855         }
 856
 857         return 0;
 858 }
 859
 860 int
 861 backend_check_controls(
 862         Operation *op,
 863         SlapReply *rs )
 864 {
 865         LDAPControl **ctrls = op->o_ctrls;
 866         rs->sr_err = LDAP_SUCCESS;
 867
 868         if( ctrls ) {
 869                 for( ; *ctrls != NULL ; ctrls++ ) {
 870                         int cid;
 871
 872                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 873                         case LDAP_CONTROL_NOT_FOUND:
 874                                 /* unrecognized control */
 875                                 if ( (*ctrls)->ldctl_iscritical ) {
 876                                         /* should not be reachable */
 877                                         Debug( LDAP_DEBUG_ANY,
 878                                                 "backend_check_controls: unrecognized control: %s\n",
 879                                                 (*ctrls)->ldctl_oid, 0, 0 );
 880                                         assert( 0 );
 881                                 }
 882                                 break;
 883
 884                         case LDAP_COMPARE_FALSE:
 885                                 if ( !op->o_bd->be_ctrls[ cid ] )
 886                                 {
 887                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 888                                          * is recognized and appropriate for the operation (which
 889                                          * we've already verified), then the server should make
 890                                          * use of the control when performing the operation.
 891                                          *
 892                                          * Here we find that operation extended by the control
 893                                          * is not unavailable in a particular context, hence the
 894                                          * return of unwillingToPerform.
 895                                          */
 896                                         rs->sr_text = "control unavailable in context";
 897                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 898                                         goto done;
 899                                 }
 900                                 break;
 901
 902                         case LDAP_COMPARE_TRUE:
 903                                 break;
 904
 905                         default:
 906                                 /* unreachable */
 907                                 rs->sr_text = "unable to check control";
 908                                 rs->sr_err = LDAP_OTHER;
 909                                 goto done;
 910                         }
 911                 }
 912         }
 913
 914 done:;
 915         return rs->sr_err;
 916 }
 917
 918 int
 919 backend_check_restrictions(
 920         Operation *op,
 921         SlapReply *rs,
 922         struct berval *opdata )
 923 {
 924         slap_mask_t restrictops;
 925         slap_mask_t requires;
 926         slap_mask_t opflag;
 927         slap_mask_t exopflag = 0;
 928         slap_ssf_set_t *ssf;
 929         int updateop = 0;
 930         int starttls = 0;
 931         int session = 0;
 932
 933         if ( op->o_bd ) {
 934                 int     rc = SLAP_CB_CONTINUE;
 935
 936                 if ( op->o_bd->be_chk_controls ) {
 937                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 938                 }
 939
 940                 if ( rc == SLAP_CB_CONTINUE ) {
 941                         rc = backend_check_controls( op, rs );
 942                 }
 943
 944                 if ( rc != LDAP_SUCCESS ) {
 945                         return rs->sr_err;
 946                 }
 947
 948                 restrictops = op->o_bd->be_restrictops;
 949                 requires = op->o_bd->be_requires;
 950                 ssf = &op->o_bd->be_ssf_set;
 951
 952         } else {
 953                 restrictops = frontendDB->be_restrictops;
 954                 requires = frontendDB->be_requires;
 955                 ssf = &frontendDB->be_ssf_set;
 956         }
 957
 958         switch( op->o_tag ) {
 959         case LDAP_REQ_ADD:
 960                 opflag = SLAP_RESTRICT_OP_ADD;
 961                 updateop++;
 962                 break;
 963         case LDAP_REQ_BIND:
 964                 opflag = SLAP_RESTRICT_OP_BIND;
 965                 session++;
 966                 break;
 967         case LDAP_REQ_COMPARE:
 968                 opflag = SLAP_RESTRICT_OP_COMPARE;
 969                 break;
 970         case LDAP_REQ_DELETE:
 971                 updateop++;
 972                 opflag = SLAP_RESTRICT_OP_DELETE;
 973                 break;
 974         case LDAP_REQ_EXTENDED:
 975                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 976
 977                 if( !opdata ) {
 978                         /* treat unspecified as a modify */
 979                         opflag = SLAP_RESTRICT_OP_MODIFY;
 980                         updateop++;
 981                         break;
 982                 }
 983
 984                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 985                         session++;
 986                         starttls++;
 987                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 988                         break;
 989                 }
 990
 991                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 992                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 993                         break;
 994                 }
 995
 996                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 997                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 998                         break;
 999                 }
1000
1001                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1002                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1003                         updateop++;
1004                         break;
1005                 }
1006
1007                 /* treat everything else as a modify */
1008                 opflag = SLAP_RESTRICT_OP_MODIFY;
1009                 updateop++;
1010                 break;
1011
1012         case LDAP_REQ_MODIFY:
1013                 updateop++;
1014                 opflag = SLAP_RESTRICT_OP_MODIFY;
1015                 break;
1016         case LDAP_REQ_RENAME:
1017                 updateop++;
1018                 opflag = SLAP_RESTRICT_OP_RENAME;
1019                 break;
1020         case LDAP_REQ_SEARCH:
1021                 opflag = SLAP_RESTRICT_OP_SEARCH;
1022                 break;
1023         case LDAP_REQ_UNBIND:
1024                 session++;
1025                 opflag = 0;
1026                 break;
1027         default:
1028                 rs->sr_text = "restrict operations internal error";
1029                 rs->sr_err = LDAP_OTHER;
1030                 return rs->sr_err;
1031         }
1032
1033         if ( !starttls ) {
1034                 /* these checks don't apply to StartTLS */
1035
1036                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1037                 if( op->o_transport_ssf < ssf->sss_transport ) {
1038                         rs->sr_text = op->o_transport_ssf
1039                                 ? "stronger transport confidentiality required"
1040                                 : "transport confidentiality required";
1041                         return rs->sr_err;
1042                 }
1043
1044                 if( op->o_tls_ssf < ssf->sss_tls ) {
1045                         rs->sr_text = op->o_tls_ssf
1046                                 ? "stronger TLS confidentiality required"
1047                                 : "TLS confidentiality required";
1048                         return rs->sr_err;
1049                 }
1050
1051
1052                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1053                         /* simple bind specific check */
1054                         if( op->o_ssf < ssf->sss_simple_bind ) {
1055                                 rs->sr_text = op->o_ssf
1056                                         ? "stronger confidentiality required"
1057                                         : "confidentiality required";
1058                                 return rs->sr_err;
1059                         }
1060                 }
1061
1062                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1063                         /* these checks don't apply to SASL bind */
1064
1065                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1066                                 rs->sr_text = op->o_sasl_ssf
1067                                         ? "stronger SASL confidentiality required"
1068                                         : "SASL confidentiality required";
1069                                 return rs->sr_err;
1070                         }
1071
1072                         if( op->o_ssf < ssf->sss_ssf ) {
1073                                 rs->sr_text = op->o_ssf
1074                                         ? "stronger confidentiality required"
1075                                         : "confidentiality required";
1076                                 return rs->sr_err;
1077                         }
1078                 }
1079
1080                 if( updateop ) {
1081                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1082                                 rs->sr_text = op->o_transport_ssf
1083                                         ? "stronger transport confidentiality required for update"
1084                                         : "transport confidentiality required for update";
1085                                 return rs->sr_err;
1086                         }
1087
1088                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1089                                 rs->sr_text = op->o_tls_ssf
1090                                         ? "stronger TLS confidentiality required for update"
1091                                         : "TLS confidentiality required for update";
1092                                 return rs->sr_err;
1093                         }
1094
1095                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1096                                 rs->sr_text = op->o_sasl_ssf
1097                                         ? "stronger SASL confidentiality required for update"
1098                                         : "SASL confidentiality required for update";
1099                                 return rs->sr_err;
1100                         }
1101
1102                         if( op->o_ssf < ssf->sss_update_ssf ) {
1103                                 rs->sr_text = op->o_ssf
1104                                         ? "stronger confidentiality required for update"
1105                                         : "confidentiality required for update";
1106                                 return rs->sr_err;
1107                         }
1108
1109                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1110                                 BER_BVISEMPTY( &op->o_ndn ) )
1111                         {
1112                                 rs->sr_text = "modifications require authentication";
1113                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1114                                 return rs->sr_err;
1115                         }
1116
1117 #ifdef SLAP_X_LISTENER_MOD
1118                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) ? S_IWUSR : S_IWOTH ) ) ) {
1119                                 /* no "w" mode means readonly */
1120                                 rs->sr_text = "modifications not allowed on this listener";
1121                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1122                                 return rs->sr_err;
1123                         }
1124 #endif /* SLAP_X_LISTENER_MOD */
1125                 }
1126         }
1127
1128         if ( !session ) {
1129                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1130
1131                 if( requires & SLAP_REQUIRE_STRONG ) {
1132                         /* should check mechanism */
1133                         if( ( op->o_transport_ssf < ssf->sss_transport
1134                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1135                                 || BER_BVISEMPTY( &op->o_dn ) )
1136                         {
1137                                 rs->sr_text = "strong(er) authentication required";
1138                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1139                                 return rs->sr_err;
1140                         }
1141                 }
1142
1143                 if( requires & SLAP_REQUIRE_SASL ) {
1144                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1145                                 rs->sr_text = "SASL authentication required";
1146                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1147                                 return rs->sr_err;
1148                         }
1149                 }
1150
1151                 if( requires & SLAP_REQUIRE_AUTHC ) {
1152                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1153                                 rs->sr_text = "authentication required";
1154                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1155                                 return rs->sr_err;
1156                         }
1157                 }
1158
1159                 if( requires & SLAP_REQUIRE_BIND ) {
1160                         int version;
1161                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1162                         version = op->o_conn->c_protocol;
1163                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1164
1165                         if( !version ) {
1166                                 /* no bind has occurred */
1167                                 rs->sr_text = "BIND required";
1168                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1169                                 return rs->sr_err;
1170                         }
1171                 }
1172
1173                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1174                         if( op->o_protocol < LDAP_VERSION3 ) {
1175                                 /* no bind has occurred */
1176                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1177                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1178                                 return rs->sr_err;
1179                         }
1180                 }
1181
1182 #ifdef SLAP_X_LISTENER_MOD
1183                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1184                         if ( op->o_conn->c_listener &&
1185                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1186                 {
1187                                 /* no "x" mode means bind required */
1188                                 rs->sr_text = "bind required on this listener";
1189                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1190                                 return rs->sr_err;
1191                         }
1192                 }
1193
1194                 if ( !starttls && !updateop ) {
1195                         if ( op->o_conn->c_listener &&
1196                                 !( op->o_conn->c_listener->sl_perms &
1197                                         ( !BER_BVISEMPTY( &op->o_dn ) ? S_IRUSR : S_IROTH )))
1198                         {
1199                                 /* no "r" mode means no read */
1200                                 rs->sr_text = "read not allowed on this listener";
1201                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1202                                 return rs->sr_err;
1203                         }
1204                 }
1205 #endif /* SLAP_X_LISTENER_MOD */
1206
1207         }
1208
1209         if( ( restrictops & opflag )
1210                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1211                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1212                         rs->sr_text = "read operations restricted";
1213                 } else if ( restrictops & exopflag ) {
1214                         rs->sr_text = "extended operation restricted";
1215                 } else {
1216                         rs->sr_text = "operation restricted";
1217                 }
1218                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1219                 return rs->sr_err;
1220         }
1221
1222         rs->sr_err = LDAP_SUCCESS;
1223         return rs->sr_err;
1224 }
1225
1226 int backend_check_referrals( Operation *op, SlapReply *rs )
1227 {
1228         rs->sr_err = LDAP_SUCCESS;
1229
1230         if( op->o_bd->be_chk_referrals ) {
1231                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1232
1233                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1234                         send_ldap_result( op, rs );
1235                 }
1236         }
1237
1238         return rs->sr_err;
1239 }
1240
1241 int
1242 be_entry_get_rw(
1243         Operation *op,
1244         struct berval *ndn,
1245         ObjectClass *oc,
1246         AttributeDescription *at,
1247         int rw,
1248         Entry **e )
1249 {
1250         int rc;
1251
1252         *e = NULL;
1253
1254         if (op->o_bd == NULL) {
1255                 rc = LDAP_NO_SUCH_OBJECT;
1256         } else if ( op->o_bd->be_fetch ) {
1257                 rc = ( op->o_bd->be_fetch )( op, ndn,
1258                         oc, at, rw, e );
1259         } else {
1260                 rc = LDAP_UNWILLING_TO_PERFORM;
1261         }
1262         return rc;
1263 }
1264
1265 int
1266 backend_group(
1267         Operation *op,
1268         Entry   *target,
1269         struct berval *gr_ndn,
1270         struct berval *op_ndn,
1271         ObjectClass *group_oc,
1272         AttributeDescription *group_at )
1273 {
1274         Entry *e;
1275         Attribute *a;
1276         int rc;
1277         GroupAssertion *g;
1278         Backend *be = op->o_bd;
1279
1280         if ( op->o_abandon ) return SLAPD_ABANDON;
1281
1282         op->o_bd = select_backend( gr_ndn, 0, 0 );
1283
1284         for ( g = op->o_groups; g; g = g->ga_next ) {
1285                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1286                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1287                 {
1288                         continue;
1289                 }
1290                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1291                         break;
1292                 }
1293         }
1294
1295         if ( g ) {
1296                 rc = g->ga_res;
1297                 goto done;
1298         }
1299
1300         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1301                 e = target;
1302                 rc = 0;
1303         } else {
1304                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1305         }
1306         if ( e ) {
1307 #ifdef LDAP_SLAPI
1308                 if ( op->o_pb != NULL ) {
1309                         init_group_pblock( op, target, e, op_ndn, group_at );
1310
1311                         rc = call_group_preop_plugins( op );
1312                         if ( rc == LDAP_SUCCESS ) {
1313                                 goto done;
1314                         }
1315                 }
1316 #endif /* LDAP_SLAPI */
1317
1318                 a = attr_find( e->e_attrs, group_at );
1319                 if ( a ) {
1320                         /* If the attribute is a subtype of labeledURI, treat this as
1321                          * a dynamic group ala groupOfURLs
1322                          */
1323                         if (is_at_subtype( group_at->ad_type,
1324                                 slap_schema.si_ad_labeledURI->ad_type ) )
1325                         {
1326                                 int i;
1327                                 LDAPURLDesc *ludp;
1328                                 struct berval bv, nbase;
1329                                 Filter *filter;
1330                                 Entry *user;
1331                                 Backend *b2 = op->o_bd;
1332
1333                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1334                                         user = target;
1335                                 } else {
1336                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1337                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1338                                 }
1339
1340                                 if ( rc == 0 ) {
1341                                         rc = 1;
1342                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1343                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1344                                                         LDAP_URL_SUCCESS )
1345                                                 {
1346                                                         continue;
1347                                                 }
1348                                                 BER_BVZERO( &nbase );
1349                                                 /* host part must be empty */
1350                                                 /* attrs and extensions parts must be empty */
1351                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1352                                                         ludp->lud_attrs || ludp->lud_exts )
1353                                                 {
1354                                                         goto loopit;
1355                                                 }
1356                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1357                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1358                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1359                                                 {
1360                                                         goto loopit;
1361                                                 }
1362                                                 switch ( ludp->lud_scope ) {
1363                                                 case LDAP_SCOPE_BASE:
1364                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1365                                                                 goto loopit;
1366                                                         }
1367                                                         break;
1368                                                 case LDAP_SCOPE_ONELEVEL:
1369                                                         dnParent( op_ndn, &bv );
1370                                                         if ( !dn_match( &nbase, &bv ) ) {
1371                                                                 goto loopit;
1372                                                         }
1373                                                         break;
1374                                                 case LDAP_SCOPE_SUBTREE:
1375                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1376                                                                 goto loopit;
1377                                                         }
1378                                                         break;
1379 #ifdef LDAP_SCOPE_SUBORDINATE
1380                                                 case LDAP_SCOPE_SUBORDINATE:
1381                                                         if ( dn_match( &nbase, op_ndn ) ||
1382                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1383                                                         {
1384                                                                 goto loopit;
1385                                                         }
1386 #endif
1387                                                 }
1388                                                 filter = str2filter_x( op, ludp->lud_filter );
1389                                                 if ( filter ) {
1390                                                         if ( test_filter( NULL, user, filter ) ==
1391                                                                 LDAP_COMPARE_TRUE )
1392                                                         {
1393                                                                 rc = 0;
1394                                                         }
1395                                                         filter_free_x( op, filter );
1396                                                 }
1397 loopit:
1398                                                 ldap_free_urldesc( ludp );
1399                                                 if ( !BER_BVISNULL( &nbase ) ) {
1400                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1401                                                 }
1402                                                 if ( rc == 0 ) break;
1403                                         }
1404                                         if ( user != target ) {
1405                                                 be_entry_release_r( op, user );
1406                                         }
1407                                 }
1408                                 op->o_bd = b2;
1409                         } else {
1410                                 rc = value_find_ex( group_at,
1411                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1412                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1413                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1414                         }
1415                 } else {
1416                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1417                 }
1418                 if (e != target ) {
1419                         be_entry_release_r( op, e );
1420                 }
1421         } else {
1422                 rc = LDAP_NO_SUCH_OBJECT;
1423         }
1424
1425 #ifdef LDAP_SLAPI
1426         if ( op->o_pb ) call_group_postop_plugins( op );
1427 #endif /* LDAP_SLAPI */
1428
1429         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1430                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1431                         op->o_tmpmemctx );
1432                 g->ga_be = op->o_bd;
1433                 g->ga_oc = group_oc;
1434                 g->ga_at = group_at;
1435                 g->ga_res = rc;
1436                 g->ga_len = gr_ndn->bv_len;
1437                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1438                 g->ga_next = op->o_groups;
1439                 op->o_groups = g;
1440         }
1441 done:
1442         op->o_bd = be;
1443         return rc;
1444 }
1445
1446 #ifdef LDAP_SLAPI
1447 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1448 {
1449         BerVarray v;
1450         int rc;
1451         BerVarray *vals = (BerVarray *)c->cac_private;
1452         Operation *op = NULL;
1453         int i, j;
1454
1455         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1456         if ( op == NULL ) {
1457                 return 1;
1458         }
1459
1460         if ( op->o_conn && access_allowed( op,
1461                 e, a->a_desc, NULL, ACL_AUTH,
1462                 &c->cac_acl_state ) == 0 ) {
1463                 return 1;
1464         }
1465
1466         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) ;
1467
1468         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1469                 op->o_tmpmemctx );
1470         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1471                 if ( op->o_conn && access_allowed( op,
1472                         e, a->a_desc,
1473                         &a->a_nvals[i],
1474                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1475                         continue;
1476                 }
1477                 ber_dupbv_x( &v[j],
1478                         &a->a_nvals[i], op->o_tmpmemctx );
1479                 if ( !BER_BVISNULL( &v[j] ) ) {
1480                         j++;
1481                 }
1482         }
1483
1484         if ( j == 0 ) {
1485                 op->o_tmpfree( v, op->o_tmpmemctx );
1486                 *vals = NULL;
1487                 rc = 1;
1488         } else {
1489                 BER_BVZERO( &v[j] );
1490                 *vals = v;
1491                 rc = 0;
1492         }
1493
1494         return rc;
1495 }
1496 #endif /* LDAP_SLAPI */
1497
1498 int
1499 backend_attribute(
1500         Operation *op,
1501         Entry   *target,
1502         struct berval   *edn,
1503         AttributeDescription *entry_at,
1504         BerVarray *vals,
1505         slap_access_t access )
1506 {
1507         Entry                   *e = NULL;
1508         Attribute               *a = NULL;
1509         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1510         AccessControlState      acl_state = ACL_STATE_INIT;
1511         Backend                 *be = op->o_bd;
1512
1513         op->o_bd = select_backend( edn, 0, 0 );
1514
1515         if ( target && dn_match( &target->e_nname, edn ) ) {
1516                 e = target;
1517
1518         } else {
1519                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1520         }
1521
1522         if ( e ) {
1523                 a = attr_find( e->e_attrs, entry_at );
1524                 if ( a == NULL ) {
1525                         SlapReply       rs = { 0 };
1526                         AttributeName   anlist[ 2 ];
1527
1528                         anlist[ 0 ].an_name = entry_at->ad_cname;
1529                         anlist[ 0 ].an_desc = entry_at;
1530                         BER_BVZERO( &anlist[ 1 ].an_name );
1531                         rs.sr_attrs = anlist;
1532
1533                         /* NOTE: backend_operational() is also called
1534                          * when returning results, so it's supposed
1535                          * to do no harm to entries */
1536                         rs.sr_entry = e;
1537                         rc = backend_operational( op, &rs );
1538                         rs.sr_entry = NULL;
1539
1540                         if ( rc == LDAP_SUCCESS ) {
1541                                 if ( rs.sr_operational_attrs ) {
1542                                         freeattr = 1;
1543                                         a = rs.sr_operational_attrs;
1544
1545                                 } else {
1546                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1547                                 }
1548                         }
1549                 }
1550
1551                 if ( a ) {
1552                         BerVarray v;
1553
1554                         if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1555                                 e, entry_at, NULL, access,
1556                                 &acl_state ) == 0 ) {
1557                                 rc = LDAP_INSUFFICIENT_ACCESS;
1558                                 goto freeit;
1559                         }
1560
1561                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1562                                 ;
1563
1564                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1565                                 op->o_tmpmemctx );
1566                         for ( i = 0,j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1567                         {
1568                                 if ( op->o_conn && access > ACL_NONE &&
1569                                                 access_allowed( op, e,
1570                                                         entry_at,
1571                                                         &a->a_nvals[i],
1572                                                         access,
1573                                                         &acl_state ) == 0 )
1574                                 {
1575                                         continue;
1576                                 }
1577                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1578                                                 op->o_tmpmemctx );
1579                                 if ( !BER_BVISNULL( &v[j] ) ) {
1580                                         j++;
1581                                 }
1582                         }
1583                         if ( j == 0 ) {
1584                                 op->o_tmpfree( v, op->o_tmpmemctx );
1585                                 *vals = NULL;
1586                                 rc = LDAP_INSUFFICIENT_ACCESS;
1587
1588                         } else {
1589                                 BER_BVZERO( &v[j] );
1590                                 *vals = v;
1591                                 rc = LDAP_SUCCESS;
1592                         }
1593                 }
1594 #ifdef LDAP_SLAPI
1595                 else if ( op->o_pb ) {
1596                         /* try any computed attributes */
1597                         computed_attr_context   ctx;
1598
1599                         slapi_int_pblock_set_operation( op->o_pb, op );
1600
1601                         ctx.cac_pb = op->o_pb;
1602                         ctx.cac_attrs = NULL;
1603                         ctx.cac_userattrs = 0;
1604                         ctx.cac_opattrs = 0;
1605                         ctx.cac_acl_state = acl_state;
1606                         ctx.cac_private = (void *)vals;
1607
1608                         rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr );
1609                         if ( rc == 1 ) {
1610                                 rc = LDAP_INSUFFICIENT_ACCESS;
1611
1612                         } else {
1613                                 rc = LDAP_SUCCESS;
1614                         }
1615                 }
1616 #endif /* LDAP_SLAPI */
1617 freeit:         if ( e != target ) {
1618                         be_entry_release_r( op, e );
1619                 }
1620                 if ( freeattr ) {
1621                         attr_free( a );
1622                 }
1623         }
1624
1625         op->o_bd = be;
1626         return rc;
1627 }
1628
1629 #ifdef LDAP_SLAPI
1630 static int backend_compute_output_attr_access(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1631 {
1632         struct berval   *nval = (struct berval *)c->cac_private;
1633         Operation       *op = NULL;
1634
1635         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1636         if ( op == NULL ) {
1637                 return 1;
1638         }
1639
1640         return access_allowed( op, e, a->a_desc, nval, ACL_AUTH, NULL ) == 0;
1641 }
1642 #endif /* LDAP_SLAPI */
1643
1644 int
1645 backend_access(
1646         Operation               *op,
1647         Entry                   *target,
1648         struct berval           *edn,
1649         AttributeDescription    *entry_at,
1650         struct berval           *nval,
1651         slap_access_t           access,
1652         slap_mask_t             *mask )
1653 {
1654         Entry           *e = NULL;
1655         int             rc = LDAP_INSUFFICIENT_ACCESS;
1656         Backend         *be = op->o_bd;
1657
1658         /* pedantic */
1659         assert( op );
1660         assert( op->o_conn );
1661         assert( edn );
1662         assert( access > ACL_NONE );
1663
1664         op->o_bd = select_backend( edn, 0, 0 );
1665
1666         if ( target && dn_match( &target->e_nname, edn ) ) {
1667                 e = target;
1668
1669         } else {
1670                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1671         }
1672
1673         if ( e ) {
1674                 Attribute       *a = NULL;
1675                 int             freeattr = 0;
1676
1677                 if ( entry_at == NULL ) {
1678                         entry_at = slap_schema.si_ad_entry;
1679                 }
1680
1681                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1682                 {
1683                         if ( access_allowed_mask( op, e, entry_at,
1684                                         NULL, access, NULL, mask ) == 0 )
1685                         {
1686                                 rc = LDAP_INSUFFICIENT_ACCESS;
1687
1688                         } else {
1689                                 rc = LDAP_SUCCESS;
1690                         }
1691
1692                 } else {
1693                         a = attr_find( e->e_attrs, entry_at );
1694                         if ( a == NULL ) {
1695                                 SlapReply       rs = { 0 };
1696                                 AttributeName   anlist[ 2 ];
1697
1698                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1699                                 anlist[ 0 ].an_desc = entry_at;
1700                                 BER_BVZERO( &anlist[ 1 ].an_name );
1701                                 rs.sr_attrs = anlist;
1702
1703                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1704
1705                                 /* NOTE: backend_operational() is also called
1706                                  * when returning results, so it's supposed
1707                                  * to do no harm to entries */
1708                                 rs.sr_entry = e;
1709                                 rc = backend_operational( op, &rs );
1710                                 rs.sr_entry = NULL;
1711
1712                                 if ( rc == LDAP_SUCCESS ) {
1713                                         if ( rs.sr_operational_attrs ) {
1714                                                 freeattr = 1;
1715                                                 a = rs.sr_operational_attrs;
1716
1717                                         } else {
1718                                                 rc = LDAP_NO_SUCH_OBJECT;
1719                                         }
1720                                 }
1721                         }
1722
1723                         if ( a ) {
1724                                 if ( access_allowed_mask( op, e, entry_at,
1725                                                 nval, access, NULL, mask ) == 0 )
1726                                 {
1727                                         rc = LDAP_INSUFFICIENT_ACCESS;
1728                                         goto freeit;
1729                                 }
1730                                 rc = LDAP_SUCCESS;
1731                         }
1732 #ifdef LDAP_SLAPI
1733                         else if ( op->o_pb ) {
1734                                 /* try any computed attributes */
1735                                 computed_attr_context   ctx;
1736
1737                                 slapi_int_pblock_set_operation( op->o_pb, op );
1738
1739                                 ctx.cac_pb = op->o_pb;
1740                                 ctx.cac_attrs = NULL;
1741                                 ctx.cac_userattrs = 0;
1742                                 ctx.cac_opattrs = 0;
1743                                 ctx.cac_private = (void *)nval;
1744
1745                                 rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr_access );
1746                                 if ( rc == 1 ) {
1747                                         rc = LDAP_INSUFFICIENT_ACCESS;
1748
1749                                 } else {
1750                                         rc = LDAP_SUCCESS;
1751                                 }
1752                         }
1753 #endif /* LDAP_SLAPI */
1754                 }
1755 freeit:         if ( e != target ) {
1756                         be_entry_release_r( op, e );
1757                 }
1758                 if ( freeattr ) {
1759                         attr_free( a );
1760                 }
1761         }
1762
1763         op->o_bd = be;
1764         return rc;
1765 }
1766
1767 int backend_operational(
1768         Operation *op,
1769         SlapReply *rs )
1770 {
1771         Attribute       **ap;
1772         int             rc = 0;
1773         BackendDB       *be_orig;
1774
1775         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1776                 /* just count them */ ;
1777
1778         /*
1779          * If operational attributes (allegedly) are required,
1780          * and the backend supports specific operational attributes,
1781          * add them to the attribute list
1782          */
1783         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1784                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs )))
1785         {
1786                 *ap = slap_operational_entryDN( rs->sr_entry );
1787                 ap = &(*ap)->a_next;
1788         }
1789
1790         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1791                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs )))
1792         {
1793                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1794                 ap = &(*ap)->a_next;
1795         }
1796
1797         /* Let the overlays have a chance at this */
1798         be_orig = op->o_bd;
1799         if ( SLAP_ISOVERLAY( be_orig ))
1800                 op->o_bd = select_backend( be_orig->be_nsuffix, 0, 0 );
1801
1802         if (( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1803                 op->o_bd && op->o_bd->be_operational != NULL )
1804         {
1805                 rc = op->o_bd->be_operational( op, rs );
1806         }
1807         op->o_bd = be_orig;
1808
1809         return rc;
1810 }
1811
1812 #ifdef LDAP_SLAPI
1813 static void init_group_pblock( Operation *op, Entry *target,
1814         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1815 {
1816         slapi_int_pblock_set_operation( op->o_pb, op );
1817
1818         slapi_pblock_set( op->o_pb,
1819                 SLAPI_X_GROUP_ENTRY, (void *)e );
1820         slapi_pblock_set( op->o_pb,
1821                 SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1822         slapi_pblock_set( op->o_pb,
1823                 SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1824         slapi_pblock_set( op->o_pb,
1825                 SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1826 }
1827
1828 static int call_group_preop_plugins( Operation *op )
1829 {
1830         int rc;
1831
1832         rc = slapi_int_call_plugins( op->o_bd,
1833                 SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1834         if ( rc < 0 ) {
1835                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1836                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1837                 {
1838                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1839                 }
1840         } else {
1841                 rc = LDAP_SUCCESS;
1842         }
1843
1844         return rc;
1845 }
1846
1847 static void call_group_postop_plugins( Operation *op )
1848 {
1849         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1850 }
1851 #endif /* LDAP_SLAPI */
1852