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 /*
  41  * If a module is configured as dynamic, its header should not
  42  * get included into slapd. While this is a general rule and does
  43  * not have much of an effect in UNIX, this rule should be adhered
  44  * to for Windows, where dynamic object code should not be implicitly
  45  * imported into slapd without appropriate __declspec(dllimport) directives.
  46  */
  47
  48 int                     nBackendInfo = 0;
  49 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  50
  51 int                     nBackendDB = 0;
  52 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  53
  54 static int
  55 backend_init_controls( BackendInfo *bi )
  56 {
  57         if ( bi->bi_controls ) {
  58                 int     i;
  59
  60                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  61                         int     cid;
  62
  63                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  64                                         == LDAP_CONTROL_NOT_FOUND )
  65                         {
  66                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  67                                         assert( 0 );
  68                                 }
  69
  70                                 return -1;
  71                         }
  72
  73                         bi->bi_ctrls[ cid ] = 1;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 int backend_init(void)
  81 {
  82         int rc = -1;
  83         BackendInfo *bi;
  84
  85         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  86                 /* already initialized */
  87                 Debug( LDAP_DEBUG_ANY,
  88                         "backend_init: already initialized\n", 0, 0, 0 );
  89                 return -1;
  90         }
  91
  92         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  93                 assert( bi->bi_init != 0 );
  94
  95                 rc = bi->bi_init( bi );
  96
  97                 if(rc != 0) {
  98                         Debug( LDAP_DEBUG_ANY,
  99                                 "backend_init: initialized for type \"%s\"\n",
 100                                 bi->bi_type, 0, 0 );
 101                         /* destroy those we've already inited */
 102                         for( nBackendInfo--;
 103                                 nBackendInfo >= 0 ;
 104                                 nBackendInfo-- )
 105                         {
 106                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 107                                         slap_binfo[nBackendInfo].bi_destroy(
 108                                                 &slap_binfo[nBackendInfo] );
 109                                 }
 110                         }
 111                         return rc;
 112                 }
 113
 114                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 115         }
 116
 117         if ( nBackendInfo > 0) {
 118                 return 0;
 119         }
 120
 121 #ifdef SLAPD_MODULES
 122         return 0;
 123 #else
 124
 125         Debug( LDAP_DEBUG_ANY,
 126                 "backend_init: failed\n",
 127                 0, 0, 0 );
 128
 129         return rc;
 130 #endif /* SLAPD_MODULES */
 131 }
 132
 133 int backend_add(BackendInfo *aBackendInfo)
 134 {
 135         int rc = 0;
 136
 137         if ( aBackendInfo->bi_init == NULL ) {
 138                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 139                         "backend type \"%s\" does not have the (mandatory)init function\n",
 140                         aBackendInfo->bi_type, 0, 0 );
 141                 return -1;
 142         }
 143
 144         rc = aBackendInfo->bi_init(aBackendInfo);
 145         if ( rc != 0) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_add:  initialization for type \"%s\" failed\n",
 148                         aBackendInfo->bi_type, 0, 0 );
 149                 return rc;
 150         }
 151
 152         (void)backend_init_controls( aBackendInfo );
 153
 154         /* now add the backend type to the Backend Info List */
 155         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 156         nBackendInfo++;
 157         return 0;
 158 }
 159
 160 static int
 161 backend_set_controls( BackendDB *be )
 162 {
 163         BackendInfo     *bi = be->bd_info;
 164
 165         /* back-relay takes care of itself; so may do other */
 166         if ( overlay_is_over( be ) ) {
 167                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 168         }
 169
 170         if ( bi->bi_controls ) {
 171                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 172                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 173                                         sizeof( be->be_ctrls ) );
 174                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 175
 176                 } else {
 177                         int     i;
 178
 179                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 180                                 if ( bi->bi_ctrls[ i ] ) {
 181                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 182                                 }
 183                         }
 184                 }
 185
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* startup a specific backend database */
 192 int backend_startup_one(Backend *be)
 193 {
 194         int             rc = 0;
 195
 196         assert( be != NULL );
 197
 198         be->be_pending_csn_list = (struct be_pcl *)
 199                 ch_calloc( 1, sizeof( struct be_pcl ) );
 200
 201         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 202
 203         Debug( LDAP_DEBUG_TRACE,
 204                 "backend_startup_one: starting \"%s\"\n",
 205                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 206                 0, 0 );
 207
 208         /* set database controls */
 209         (void)backend_set_controls( be );
 210
 211         if ( be->bd_info->bi_db_open ) {
 212                 rc = be->bd_info->bi_db_open( be );
 213                 if ( rc == 0 ) {
 214                         (void)backend_set_controls( be );
 215
 216                 } else {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 219                                 rc, 0, 0 );
 220                 }
 221         }
 222
 223         return rc;
 224 }
 225
 226 int backend_startup(Backend *be)
 227 {
 228         int i;
 229         int rc = 0;
 230         BackendInfo *bi;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "backend_startup: %d databases to startup.\n",
 236                         nBackendDB, 0, 0 );
 237                 return 1;
 238         }
 239
 240         if(be != NULL) {
 241                 if ( be->bd_info->bi_open ) {
 242                         rc = be->bd_info->bi_open( be->bd_info );
 243                         if ( rc != 0 ) {
 244                                 Debug( LDAP_DEBUG_ANY,
 245                                         "backend_startup: bi_open failed!\n",
 246                                         0, 0, 0 );
 247
 248                                 return rc;
 249                         }
 250                 }
 251
 252                 return backend_startup_one( be );
 253         }
 254
 255         /* open frontend, if required */
 256         if ( frontendDB->bd_info->bi_db_open ) {
 257                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 258                 if ( rc != 0 ) {
 259                         Debug( LDAP_DEBUG_ANY,
 260                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 261                                 rc, 0, 0 );
 262                         return rc;
 263                 }
 264         }
 265
 266         /* open each backend type */
 267         i = -1;
 268         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 269                 i++;
 270                 if( bi->bi_nDB == 0) {
 271                         /* no database of this type, don't open */
 272                         continue;
 273                 }
 274
 275                 if( bi->bi_open ) {
 276                         rc = bi->bi_open( bi );
 277                         if ( rc != 0 ) {
 278                                 Debug( LDAP_DEBUG_ANY,
 279                                         "backend_startup: bi_open %d (%s) failed!\n",
 280                                         i, bi->bi_type, 0 );
 281                                 return rc;
 282                         }
 283                 }
 284
 285                 (void)backend_init_controls( bi );
 286         }
 287
 288         /* open each backend database */
 289         i = -1;
 290         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 291                 i++;
 292                 if ( be->be_suffix == NULL ) {
 293                         Debug( LDAP_DEBUG_ANY,
 294                                 "backend_startup: warning, database %d (%s) "
 295                                 "has no suffix\n",
 296                                 i, be->bd_info->bi_type, 0 );
 297                 }
 298                 /* append global access controls */
 299                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 300
 301                 rc = backend_startup_one( be );
 302
 303                 if ( rc ) return rc;
 304         }
 305
 306         return rc;
 307 }
 308
 309 int backend_num( Backend *be )
 310 {
 311         int i = 0;
 312         BackendDB *b2;
 313
 314         if( be == NULL ) return -1;
 315
 316         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 317                 if( be == b2 ) return i;
 318                 i++;
 319         }
 320         return -1;
 321 }
 322
 323 int backend_shutdown( Backend *be )
 324 {
 325         int rc = 0;
 326         BackendInfo *bi;
 327
 328         if( be != NULL ) {
 329                 /* shutdown a specific backend database */
 330
 331                 if ( be->bd_info->bi_nDB == 0 ) {
 332                         /* no database of this type, we never opened it */
 333                         return 0;
 334                 }
 335
 336                 if ( be->bd_info->bi_db_close ) {
 337                         be->bd_info->bi_db_close( be );
 338                 }
 339
 340                 if( be->bd_info->bi_close ) {
 341                         be->bd_info->bi_close( be->bd_info );
 342                 }
 343
 344                 return 0;
 345         }
 346
 347         /* close each backend database */
 348         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 349                 if ( be->bd_info->bi_db_close ) {
 350                         be->bd_info->bi_db_close( be );
 351                 }
 352
 353                 if(rc != 0) {
 354                         Debug( LDAP_DEBUG_ANY,
 355                                 "backend_close: bi_db_close %s failed!\n",
 356                                 be->be_type, 0, 0 );
 357                 }
 358         }
 359
 360         /* close each backend type */
 361         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 362                 if( bi->bi_nDB == 0 ) {
 363                         /* no database of this type */
 364                         continue;
 365                 }
 366
 367                 if( bi->bi_close ) {
 368                         bi->bi_close( bi );
 369                 }
 370         }
 371
 372         /* close frontend, if required */
 373         if ( frontendDB->bd_info->bi_db_close ) {
 374                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 375                 if ( rc != 0 ) {
 376                         Debug( LDAP_DEBUG_ANY,
 377                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 378                                 rc, 0, 0 );
 379                 }
 380         }
 381
 382         return 0;
 383 }
 384
 385 void backend_destroy_one( BackendDB *bd, int dynamic )
 386 {
 387         if ( dynamic ) {
 388                 LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 389         }
 390
 391         if ( bd->be_syncinfo ) {
 392                 syncinfo_free( bd->be_syncinfo );
 393         }
 394
 395         if ( bd->be_pending_csn_list ) {
 396                 struct slap_csn_entry *csne;
 397                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 398                 while ( csne ) {
 399                         struct slap_csn_entry *tmp_csne = csne;
 400
 401                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 402                         ch_free( csne->ce_csn.bv_val );
 403                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 404                         ch_free( tmp_csne );
 405                 }
 406                 ch_free( bd->be_pending_csn_list );
 407         }
 408
 409         if ( bd->bd_info->bi_db_destroy ) {
 410                 bd->bd_info->bi_db_destroy( bd );
 411         }
 412         ber_bvarray_free( bd->be_suffix );
 413         ber_bvarray_free( bd->be_nsuffix );
 414         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 415                 free( bd->be_rootdn.bv_val );
 416         }
 417         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 418                 free( bd->be_rootndn.bv_val );
 419         }
 420         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 421                 free( bd->be_rootpw.bv_val );
 422         }
 423         acl_destroy( bd->be_acl, frontendDB->be_acl );
 424         limits_destroy( bd->be_limits );
 425         if ( bd->be_replogfile ) {
 426                 ch_free( bd->be_replogfile );
 427         }
 428         destroy_replica_info( bd );
 429         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 430                 ch_free( bd->be_update_ndn.bv_val );
 431         }
 432         if ( bd->be_update_refs ) {
 433                 ber_bvarray_free( bd->be_update_refs );
 434         }
 435
 436         if ( dynamic ) {
 437                 free( bd );
 438         }
 439 }
 440
 441 int backend_destroy(void)
 442 {
 443         BackendDB *bd;
 444         BackendInfo *bi;
 445
 446         /* destroy each backend database */
 447         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 448                 backend_destroy_one( bd, 1 );
 449         }
 450
 451         /* destroy each backend type */
 452         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 453                 if( bi->bi_destroy ) {
 454                         bi->bi_destroy( bi );
 455                 }
 456         }
 457
 458         nBackendInfo = 0;
 459         LDAP_STAILQ_INIT(&backendInfo);
 460
 461         /* destroy frontend database */
 462         bd = frontendDB;
 463         if ( bd ) {
 464                 if ( bd->bd_info->bi_db_destroy ) {
 465                         bd->bd_info->bi_db_destroy( bd );
 466                 }
 467                 ber_bvarray_free( bd->be_suffix );
 468                 ber_bvarray_free( bd->be_nsuffix );
 469                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 470                         free( bd->be_rootdn.bv_val );
 471                 }
 472                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 473                         free( bd->be_rootndn.bv_val );
 474                 }
 475                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 476                         free( bd->be_rootpw.bv_val );
 477                 }
 478                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 479
 480                 if ( bd->be_replogfile != NULL ) {
 481                         free( bd->be_replogfile );
 482                 }
 483                 assert( bd->be_replica == NULL );
 484         }
 485
 486         return 0;
 487 }
 488
 489 BackendInfo* backend_info(const char *type)
 490 {
 491         BackendInfo *bi;
 492
 493         /* search for the backend type */
 494         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 495                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 496                         return bi;
 497                 }
 498         }
 499
 500         return NULL;
 501 }
 502
 503
 504 BackendDB *
 505 backend_db_init(
 506     const char  *type )
 507 {
 508         Backend *be;
 509         BackendInfo *bi = backend_info(type);
 510         int     rc = 0;
 511
 512         if( bi == NULL ) {
 513                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 514                 return NULL;
 515         }
 516
 517         be = ch_calloc( 1, sizeof(Backend) );
 518         nbackends++;
 519         LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 520
 521         be->bd_info = bi;
 522
 523         be->be_def_limit = frontendDB->be_def_limit;
 524         be->be_dfltaccess = frontendDB->be_dfltaccess;
 525
 526         be->be_restrictops = frontendDB->be_restrictops;
 527         be->be_requires = frontendDB->be_requires;
 528         be->be_ssf_set = frontendDB->be_ssf_set;
 529
 530         be->be_pcl_mutexp = &be->be_pcl_mutex;
 531         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 532
 533         /* assign a default depth limit for alias deref */
 534         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 535
 536         if ( bi->bi_db_init ) {
 537                 rc = bi->bi_db_init( be );
 538         }
 539
 540         if ( rc != 0 ) {
 541                 fprintf( stderr, "database init failed (%s)\n", type );
 542                 nbackends--;
 543                 return NULL;
 544         }
 545
 546         bi->bi_nDB++;
 547         return( be );
 548 }
 549
 550 void
 551 be_db_close( void )
 552 {
 553         BackendDB *be;
 554
 555         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 556                 if ( be->bd_info->bi_db_close ) {
 557                         be->bd_info->bi_db_close( be );
 558                 }
 559         }
 560
 561         if ( frontendDB->bd_info->bi_db_close ) {
 562                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 563         }
 564
 565 }
 566
 567 Backend *
 568 select_backend(
 569         struct berval * dn,
 570         int manageDSAit,
 571         int noSubs )
 572 {
 573         int             j;
 574         ber_len_t       len, dnlen = dn->bv_len;
 575         Backend         *be, *b2 = NULL;
 576
 577         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 578                 if ( be->be_nsuffix == NULL ) {
 579                         continue;
 580                 }
 581
 582                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 583                 {
 584                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 585                         {
 586                                 continue;
 587                         }
 588
 589                         len = be->be_nsuffix[j].bv_len;
 590
 591                         if ( len > dnlen ) {
 592                                 /* suffix is longer than DN */
 593                                 continue;
 594                         }
 595
 596                         /*
 597                          * input DN is normalized, so the separator check
 598                          * need not look at escaping
 599                          */
 600                         if ( len && len < dnlen &&
 601                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 602                         {
 603                                 continue;
 604                         }
 605
 606                         if ( strcmp( be->be_nsuffix[j].bv_val,
 607                                 &dn->bv_val[dnlen-len] ) == 0 )
 608                         {
 609                                 if( b2 == NULL ) {
 610                                         b2 = be;
 611
 612                                         if( manageDSAit && len == dnlen &&
 613                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 614                                                 continue;
 615                                         }
 616                                 } else {
 617                                         /* If any parts of the tree are glued, use the first
 618                                          * match regardless of manageDSAit. Otherwise use the
 619                                          * last match.
 620                                          */
 621                                         if( !( SLAP_DBFLAGS( be ) & ( SLAP_DBFLAG_GLUE_INSTANCE |
 622                                                 SLAP_DBFLAG_GLUE_SUBORDINATE )))
 623                                                 b2 = be;
 624                                 }
 625                                 return b2;
 626                         }
 627                 }
 628         }
 629
 630         return b2;
 631 }
 632
 633 int
 634 be_issuffix(
 635     Backend *be,
 636     struct berval *bvsuffix )
 637 {
 638         int     i;
 639
 640         if ( be->be_nsuffix == NULL ) {
 641                 return 0;
 642         }
 643
 644         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 645                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 646                         return 1;
 647                 }
 648         }
 649
 650         return 0;
 651 }
 652
 653 int
 654 be_isroot_dn( Backend *be, struct berval *ndn )
 655 {
 656         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 657                 return 0;
 658         }
 659
 660         return dn_match( &be->be_rootndn, ndn );
 661 }
 662
 663 int
 664 be_slurp_update( Operation *op )
 665 {
 666         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 667                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 668 }
 669
 670 int
 671 be_shadow_update( Operation *op )
 672 {
 673         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 674                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 675 }
 676
 677 int
 678 be_isupdate_dn( Backend *be, struct berval *ndn )
 679 {
 680         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 681                 return 0;
 682         }
 683
 684         return dn_match( &be->be_update_ndn, ndn );
 685 }
 686
 687 struct berval *
 688 be_root_dn( Backend *be )
 689 {
 690         return &be->be_rootdn;
 691 }
 692
 693 int
 694 be_isroot( Operation *op )
 695 {
 696         return be_isroot_dn( op->o_bd, &op->o_ndn );
 697 }
 698
 699 int
 700 be_isroot_pw( Operation *op )
 701 {
 702         int result;
 703
 704         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 705                 return 0;
 706         }
 707
 708         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 709                 return 0;
 710         }
 711
 712 #ifdef SLAPD_SPASSWD
 713         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 714                 op->o_conn->c_sasl_authctx, NULL );
 715 #endif
 716
 717         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 718
 719 #ifdef SLAPD_SPASSWD
 720         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 721 #endif
 722
 723         return result == 0;
 724 }
 725
 726 int
 727 be_entry_release_rw(
 728         Operation *op,
 729         Entry *e,
 730         int rw )
 731 {
 732         if ( op->o_bd->be_release ) {
 733                 /* free and release entry from backend */
 734                 return op->o_bd->be_release( op, e, rw );
 735         } else {
 736                 /* free entry */
 737                 entry_free( e );
 738                 return 0;
 739         }
 740 }
 741
 742 int
 743 backend_unbind( Operation *op, SlapReply *rs )
 744 {
 745         BackendDB *be;
 746
 747         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 748                 if ( be->be_unbind ) {
 749                         op->o_bd = be;
 750                         be->be_unbind( op, rs );
 751                 }
 752         }
 753
 754         return 0;
 755 }
 756
 757 int
 758 backend_connection_init(
 759         Connection   *conn )
 760 {
 761         BackendDB *be;
 762
 763         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 764                 if ( be->be_connection_init ) {
 765                         be->be_connection_init( be, conn );
 766                 }
 767         }
 768
 769         return 0;
 770 }
 771
 772 int
 773 backend_connection_destroy(
 774         Connection   *conn )
 775 {
 776         BackendDB *be;
 777
 778         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 779                 if ( be->be_connection_destroy ) {
 780                         be->be_connection_destroy( be, conn);
 781                 }
 782         }
 783
 784         return 0;
 785 }
 786
 787 int
 788 backend_check_controls(
 789         Operation *op,
 790         SlapReply *rs )
 791 {
 792         LDAPControl **ctrls = op->o_ctrls;
 793         rs->sr_err = LDAP_SUCCESS;
 794
 795         if( ctrls ) {
 796                 for( ; *ctrls != NULL ; ctrls++ ) {
 797                         int cid;
 798
 799                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 800                         case LDAP_CONTROL_NOT_FOUND:
 801                                 /* unrecognized control */
 802                                 if ( (*ctrls)->ldctl_iscritical ) {
 803                                         /* should not be reachable */
 804                                         Debug( LDAP_DEBUG_ANY,
 805                                                 "backend_check_controls: unrecognized control: %s\n",
 806                                                 (*ctrls)->ldctl_oid, 0, 0 );
 807                                         assert( 0 );
 808                                 }
 809                                 break;
 810
 811                         case LDAP_COMPARE_FALSE:
 812                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 813                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 814                                          * is recognized and appropriate for the operation (which
 815                                          * we've already verified), then the server should make
 816                                          * use of the control when performing the operation.
 817                                          *
 818                                          * Here we find that operation extended by the control
 819                                          * is unavailable in a particular context, and the control
 820                                          * is marked Critical, hence the return of
 821                                          * unwillingToPerform.
 822                                          */
 823                                         rs->sr_text = "critical control unavailable in context";
 824                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 825                                         goto done;
 826                                 }
 827                                 break;
 828
 829                         case LDAP_COMPARE_TRUE:
 830                                 break;
 831
 832                         default:
 833                                 /* unreachable */
 834                                 Debug( LDAP_DEBUG_ANY,
 835                                         "backend_check_controls: unable to check control: %s\n",
 836                                         (*ctrls)->ldctl_oid, 0, 0 );
 837                                 assert( 0 );
 838
 839                                 rs->sr_text = "unable to check control";
 840                                 rs->sr_err = LDAP_OTHER;
 841                                 goto done;
 842                         }
 843                 }
 844         }
 845
 846         /* temporarily removed */
 847 #if 0
 848         /* check should be generalized */
 849         if( get_manageDIT(op) && !be_isroot(op)) {
 850                 rs->sr_text = "requires manager authorization";
 851                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 852         }
 853 #endif
 854
 855 done:;
 856         return rs->sr_err;
 857 }
 858
 859 int
 860 backend_check_restrictions(
 861         Operation *op,
 862         SlapReply *rs,
 863         struct berval *opdata )
 864 {
 865         slap_mask_t restrictops;
 866         slap_mask_t requires;
 867         slap_mask_t opflag;
 868         slap_mask_t exopflag = 0;
 869         slap_ssf_set_t *ssf;
 870         int updateop = 0;
 871         int starttls = 0;
 872         int session = 0;
 873
 874         if ( op->o_bd ) {
 875                 int     rc = SLAP_CB_CONTINUE;
 876
 877                 if ( op->o_bd->be_chk_controls ) {
 878                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 879                 }
 880
 881                 if ( rc == SLAP_CB_CONTINUE ) {
 882                         rc = backend_check_controls( op, rs );
 883                 }
 884
 885                 if ( rc != LDAP_SUCCESS ) {
 886                         return rs->sr_err;
 887                 }
 888
 889                 restrictops = op->o_bd->be_restrictops;
 890                 requires = op->o_bd->be_requires;
 891                 ssf = &op->o_bd->be_ssf_set;
 892
 893         } else {
 894                 restrictops = frontendDB->be_restrictops;
 895                 requires = frontendDB->be_requires;
 896                 ssf = &frontendDB->be_ssf_set;
 897         }
 898
 899         switch( op->o_tag ) {
 900         case LDAP_REQ_ADD:
 901                 opflag = SLAP_RESTRICT_OP_ADD;
 902                 updateop++;
 903                 break;
 904         case LDAP_REQ_BIND:
 905                 opflag = SLAP_RESTRICT_OP_BIND;
 906                 session++;
 907                 break;
 908         case LDAP_REQ_COMPARE:
 909                 opflag = SLAP_RESTRICT_OP_COMPARE;
 910                 break;
 911         case LDAP_REQ_DELETE:
 912                 updateop++;
 913                 opflag = SLAP_RESTRICT_OP_DELETE;
 914                 break;
 915         case LDAP_REQ_EXTENDED:
 916                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 917
 918                 if( !opdata ) {
 919                         /* treat unspecified as a modify */
 920                         opflag = SLAP_RESTRICT_OP_MODIFY;
 921                         updateop++;
 922                         break;
 923                 }
 924
 925                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 926                         session++;
 927                         starttls++;
 928                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 929                         break;
 930                 }
 931
 932                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 933                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 934                         break;
 935                 }
 936
 937                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 938                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 939                         break;
 940                 }
 941
 942                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 943                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 944                         updateop++;
 945                         break;
 946                 }
 947
 948                 /* treat everything else as a modify */
 949                 opflag = SLAP_RESTRICT_OP_MODIFY;
 950                 updateop++;
 951                 break;
 952
 953         case LDAP_REQ_MODIFY:
 954                 updateop++;
 955                 opflag = SLAP_RESTRICT_OP_MODIFY;
 956                 break;
 957         case LDAP_REQ_RENAME:
 958                 updateop++;
 959                 opflag = SLAP_RESTRICT_OP_RENAME;
 960                 break;
 961         case LDAP_REQ_SEARCH:
 962                 opflag = SLAP_RESTRICT_OP_SEARCH;
 963                 break;
 964         case LDAP_REQ_UNBIND:
 965                 session++;
 966                 opflag = 0;
 967                 break;
 968         default:
 969                 rs->sr_text = "restrict operations internal error";
 970                 rs->sr_err = LDAP_OTHER;
 971                 return rs->sr_err;
 972         }
 973
 974         if ( !starttls ) {
 975                 /* these checks don't apply to StartTLS */
 976
 977                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 978                 if( op->o_transport_ssf < ssf->sss_transport ) {
 979                         rs->sr_text = op->o_transport_ssf
 980                                 ? "stronger transport confidentiality required"
 981                                 : "transport confidentiality required";
 982                         return rs->sr_err;
 983                 }
 984
 985                 if( op->o_tls_ssf < ssf->sss_tls ) {
 986                         rs->sr_text = op->o_tls_ssf
 987                                 ? "stronger TLS confidentiality required"
 988                                 : "TLS confidentiality required";
 989                         return rs->sr_err;
 990                 }
 991
 992
 993                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 994                         /* simple bind specific check */
 995                         if( op->o_ssf < ssf->sss_simple_bind ) {
 996                                 rs->sr_text = op->o_ssf
 997                                         ? "stronger confidentiality required"
 998                                         : "confidentiality required";
 999                                 return rs->sr_err;
1000                         }
1001                 }
1002
1003                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1004                         /* these checks don't apply to SASL bind */
1005
1006                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1007                                 rs->sr_text = op->o_sasl_ssf
1008                                         ? "stronger SASL confidentiality required"
1009                                         : "SASL confidentiality required";
1010                                 return rs->sr_err;
1011                         }
1012
1013                         if( op->o_ssf < ssf->sss_ssf ) {
1014                                 rs->sr_text = op->o_ssf
1015                                         ? "stronger confidentiality required"
1016                                         : "confidentiality required";
1017                                 return rs->sr_err;
1018                         }
1019                 }
1020
1021                 if( updateop ) {
1022                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1023                                 rs->sr_text = op->o_transport_ssf
1024                                         ? "stronger transport confidentiality required for update"
1025                                         : "transport confidentiality required for update";
1026                                 return rs->sr_err;
1027                         }
1028
1029                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1030                                 rs->sr_text = op->o_tls_ssf
1031                                         ? "stronger TLS confidentiality required for update"
1032                                         : "TLS confidentiality required for update";
1033                                 return rs->sr_err;
1034                         }
1035
1036                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1037                                 rs->sr_text = op->o_sasl_ssf
1038                                         ? "stronger SASL confidentiality required for update"
1039                                         : "SASL confidentiality required for update";
1040                                 return rs->sr_err;
1041                         }
1042
1043                         if( op->o_ssf < ssf->sss_update_ssf ) {
1044                                 rs->sr_text = op->o_ssf
1045                                         ? "stronger confidentiality required for update"
1046                                         : "confidentiality required for update";
1047                                 return rs->sr_err;
1048                         }
1049
1050                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1051                                 BER_BVISEMPTY( &op->o_ndn ) )
1052                         {
1053                                 rs->sr_text = "modifications require authentication";
1054                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1055                                 return rs->sr_err;
1056                         }
1057
1058 #ifdef SLAP_X_LISTENER_MOD
1059                         if ( op->o_conn->c_listener &&
1060                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1061                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1062                         {
1063                                 /* no "w" mode means readonly */
1064                                 rs->sr_text = "modifications not allowed on this listener";
1065                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1066                                 return rs->sr_err;
1067                         }
1068 #endif /* SLAP_X_LISTENER_MOD */
1069                 }
1070         }
1071
1072         if ( !session ) {
1073                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1074
1075                 if( requires & SLAP_REQUIRE_STRONG ) {
1076                         /* should check mechanism */
1077                         if( ( op->o_transport_ssf < ssf->sss_transport
1078                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1079                                 || BER_BVISEMPTY( &op->o_dn ) )
1080                         {
1081                                 rs->sr_text = "strong(er) authentication required";
1082                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1083                                 return rs->sr_err;
1084                         }
1085                 }
1086
1087                 if( requires & SLAP_REQUIRE_SASL ) {
1088                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1089                                 rs->sr_text = "SASL authentication required";
1090                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1091                                 return rs->sr_err;
1092                         }
1093                 }
1094
1095                 if( requires & SLAP_REQUIRE_AUTHC ) {
1096                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1097                                 rs->sr_text = "authentication required";
1098                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1099                                 return rs->sr_err;
1100                         }
1101                 }
1102
1103                 if( requires & SLAP_REQUIRE_BIND ) {
1104                         int version;
1105                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1106                         version = op->o_conn->c_protocol;
1107                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1108
1109                         if( !version ) {
1110                                 /* no bind has occurred */
1111                                 rs->sr_text = "BIND required";
1112                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1113                                 return rs->sr_err;
1114                         }
1115                 }
1116
1117                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1118                         if( op->o_protocol < LDAP_VERSION3 ) {
1119                                 /* no bind has occurred */
1120                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1121                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1122                                 return rs->sr_err;
1123                         }
1124                 }
1125
1126 #ifdef SLAP_X_LISTENER_MOD
1127                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1128                         if ( op->o_conn->c_listener &&
1129                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1130                 {
1131                                 /* no "x" mode means bind required */
1132                                 rs->sr_text = "bind required on this listener";
1133                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1134                                 return rs->sr_err;
1135                         }
1136                 }
1137
1138                 if ( !starttls && !updateop ) {
1139                         if ( op->o_conn->c_listener &&
1140                                 !( op->o_conn->c_listener->sl_perms &
1141                                         ( !BER_BVISEMPTY( &op->o_dn )
1142                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1143                         {
1144                                 /* no "r" mode means no read */
1145                                 rs->sr_text = "read not allowed on this listener";
1146                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1147                                 return rs->sr_err;
1148                         }
1149                 }
1150 #endif /* SLAP_X_LISTENER_MOD */
1151
1152         }
1153
1154         if( ( restrictops & opflag )
1155                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1156                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1157                         rs->sr_text = "read operations restricted";
1158                 } else if ( restrictops & exopflag ) {
1159                         rs->sr_text = "extended operation restricted";
1160                 } else {
1161                         rs->sr_text = "operation restricted";
1162                 }
1163                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1164                 return rs->sr_err;
1165         }
1166
1167         rs->sr_err = LDAP_SUCCESS;
1168         return rs->sr_err;
1169 }
1170
1171 int backend_check_referrals( Operation *op, SlapReply *rs )
1172 {
1173         rs->sr_err = LDAP_SUCCESS;
1174
1175         if( op->o_bd->be_chk_referrals ) {
1176                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1177
1178                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1179                         send_ldap_result( op, rs );
1180                 }
1181         }
1182
1183         return rs->sr_err;
1184 }
1185
1186 int
1187 be_entry_get_rw(
1188         Operation *op,
1189         struct berval *ndn,
1190         ObjectClass *oc,
1191         AttributeDescription *at,
1192         int rw,
1193         Entry **e )
1194 {
1195         *e = NULL;
1196
1197         if ( op->o_bd == NULL ) {
1198                 return LDAP_NO_SUCH_OBJECT;
1199         }
1200
1201         if ( op->o_bd->be_fetch ) {
1202                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1203         }
1204
1205         return LDAP_UNWILLING_TO_PERFORM;
1206 }
1207
1208 int
1209 fe_acl_group(
1210         Operation *op,
1211         Entry   *target,
1212         struct berval *gr_ndn,
1213         struct berval *op_ndn,
1214         ObjectClass *group_oc,
1215         AttributeDescription *group_at )
1216 {
1217         Entry *e;
1218         Attribute *a;
1219         int rc;
1220         GroupAssertion *g;
1221         Backend *be = op->o_bd;
1222
1223         op->o_bd = select_backend( gr_ndn, 0, 0 );
1224
1225         for ( g = op->o_groups; g; g = g->ga_next ) {
1226                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1227                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1228                 {
1229                         continue;
1230                 }
1231                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1232                         break;
1233                 }
1234         }
1235
1236         if ( g ) {
1237                 rc = g->ga_res;
1238                 goto done;
1239         }
1240
1241         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1242                 e = target;
1243                 rc = 0;
1244         } else {
1245                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1246         }
1247         if ( e ) {
1248                 a = attr_find( e->e_attrs, group_at );
1249                 if ( a ) {
1250                         /* If the attribute is a subtype of labeledURI, treat this as
1251                          * a dynamic group ala groupOfURLs
1252                          */
1253                         if (is_at_subtype( group_at->ad_type,
1254                                 slap_schema.si_ad_labeledURI->ad_type ) )
1255                         {
1256                                 int i;
1257                                 LDAPURLDesc *ludp;
1258                                 struct berval bv, nbase;
1259                                 Filter *filter;
1260                                 Entry *user;
1261                                 Backend *b2 = op->o_bd;
1262
1263                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1264                                         user = target;
1265                                 } else {
1266                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1267                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1268                                 }
1269
1270                                 if ( rc == 0 ) {
1271                                         rc = LDAP_COMPARE_FALSE;
1272                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1273                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1274                                                         LDAP_URL_SUCCESS )
1275                                                 {
1276                                                         continue;
1277                                                 }
1278                                                 BER_BVZERO( &nbase );
1279                                                 /* host part must be empty */
1280                                                 /* attrs and extensions parts must be empty */
1281                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1282                                                         ludp->lud_attrs || ludp->lud_exts )
1283                                                 {
1284                                                         goto loopit;
1285                                                 }
1286                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1287                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1288                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1289                                                 {
1290                                                         goto loopit;
1291                                                 }
1292                                                 switch ( ludp->lud_scope ) {
1293                                                 case LDAP_SCOPE_BASE:
1294                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1295                                                                 goto loopit;
1296                                                         }
1297                                                         break;
1298                                                 case LDAP_SCOPE_ONELEVEL:
1299                                                         dnParent( op_ndn, &bv );
1300                                                         if ( !dn_match( &nbase, &bv ) ) {
1301                                                                 goto loopit;
1302                                                         }
1303                                                         break;
1304                                                 case LDAP_SCOPE_SUBTREE:
1305                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1306                                                                 goto loopit;
1307                                                         }
1308                                                         break;
1309 #ifdef LDAP_SCOPE_SUBORDINATE
1310                                                 case LDAP_SCOPE_SUBORDINATE:
1311                                                         if ( dn_match( &nbase, op_ndn ) ||
1312                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1313                                                         {
1314                                                                 goto loopit;
1315                                                         }
1316 #endif
1317                                                 }
1318                                                 filter = str2filter_x( op, ludp->lud_filter );
1319                                                 if ( filter ) {
1320                                                         if ( test_filter( NULL, user, filter ) ==
1321                                                                 LDAP_COMPARE_TRUE )
1322                                                         {
1323                                                                 rc = 0;
1324                                                         }
1325                                                         filter_free_x( op, filter );
1326                                                 }
1327 loopit:
1328                                                 ldap_free_urldesc( ludp );
1329                                                 if ( !BER_BVISNULL( &nbase ) ) {
1330                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1331                                                 }
1332                                                 if ( rc == 0 ) break;
1333                                         }
1334                                         if ( user != target ) {
1335                                                 be_entry_release_r( op, user );
1336                                         }
1337                                 }
1338                                 op->o_bd = b2;
1339                         } else {
1340                                 rc = value_find_ex( group_at,
1341                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1342                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1343                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1344                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1345                                         rc = LDAP_COMPARE_FALSE;
1346                         }
1347                 } else {
1348                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1349                 }
1350                 if (e != target ) {
1351                         be_entry_release_r( op, e );
1352                 }
1353         } else {
1354                 rc = LDAP_NO_SUCH_OBJECT;
1355         }
1356
1357         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1358                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1359                         op->o_tmpmemctx );
1360                 g->ga_be = op->o_bd;
1361                 g->ga_oc = group_oc;
1362                 g->ga_at = group_at;
1363                 g->ga_res = rc;
1364                 g->ga_len = gr_ndn->bv_len;
1365                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1366                 g->ga_next = op->o_groups;
1367                 op->o_groups = g;
1368         }
1369 done:
1370         op->o_bd = be;
1371         return rc;
1372 }
1373
1374 int
1375 backend_group(
1376         Operation *op,
1377         Entry   *target,
1378         struct berval *gr_ndn,
1379         struct berval *op_ndn,
1380         ObjectClass *group_oc,
1381         AttributeDescription *group_at )
1382 {
1383         int                     rc;
1384         BackendDB               *be_orig;
1385
1386         if ( op->o_abandon ) {
1387                 return SLAPD_ABANDON;
1388         }
1389
1390         be_orig = op->o_bd;
1391         op->o_bd = frontendDB;
1392 #ifdef SLAP_OVERLAY_ACCESS
1393         rc = frontendDB->be_group( op, target, gr_ndn,
1394                 op_ndn, group_oc, group_at );
1395 #else /* ! SLAP_OVERLAY_ACCESS */
1396         rc = fe_acl_group( op, target, gr_ndn,
1397                 op_ndn, group_oc, group_at );
1398 #endif /* ! SLAP_OVERLAY_ACCESS */
1399         op->o_bd = be_orig;
1400
1401         return rc;
1402 }
1403
1404 int
1405 fe_acl_attribute(
1406         Operation *op,
1407         Entry   *target,
1408         struct berval   *edn,
1409         AttributeDescription *entry_at,
1410         BerVarray *vals,
1411         slap_access_t access )
1412 {
1413         Entry                   *e = NULL;
1414         Attribute               *a = NULL;
1415         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1416         AccessControlState      acl_state = ACL_STATE_INIT;
1417         Backend                 *be = op->o_bd;
1418
1419         op->o_bd = select_backend( edn, 0, 0 );
1420
1421         if ( target && dn_match( &target->e_nname, edn ) ) {
1422                 e = target;
1423
1424         } else {
1425                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1426         }
1427
1428         if ( e ) {
1429                 a = attr_find( e->e_attrs, entry_at );
1430                 if ( a == NULL ) {
1431                         SlapReply       rs = { 0 };
1432                         AttributeName   anlist[ 2 ];
1433
1434                         anlist[ 0 ].an_name = entry_at->ad_cname;
1435                         anlist[ 0 ].an_desc = entry_at;
1436                         BER_BVZERO( &anlist[ 1 ].an_name );
1437                         rs.sr_attrs = anlist;
1438
1439                         /* NOTE: backend_operational() is also called
1440                          * when returning results, so it's supposed
1441                          * to do no harm to entries */
1442                         rs.sr_entry = e;
1443                         rc = backend_operational( op, &rs );
1444                         rs.sr_entry = NULL;
1445
1446                         if ( rc == LDAP_SUCCESS ) {
1447                                 if ( rs.sr_operational_attrs ) {
1448                                         freeattr = 1;
1449                                         a = rs.sr_operational_attrs;
1450
1451                                 } else {
1452                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1453                                 }
1454                         }
1455                 }
1456
1457                 if ( a ) {
1458                         BerVarray v;
1459
1460                         if ( op->o_conn && access > ACL_NONE &&
1461                                 access_allowed( op, e, entry_at, NULL,
1462                                                 access, &acl_state ) == 0 )
1463                         {
1464                                 rc = LDAP_INSUFFICIENT_ACCESS;
1465                                 goto freeit;
1466                         }
1467
1468                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1469                                 ;
1470
1471                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1472                                 op->o_tmpmemctx );
1473                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1474                         {
1475                                 if ( op->o_conn && access > ACL_NONE &&
1476                                         access_allowed( op, e, entry_at,
1477                                                         &a->a_nvals[i],
1478                                                         access,
1479                                                         &acl_state ) == 0 )
1480                                 {
1481                                         continue;
1482                                 }
1483                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1484                                                 op->o_tmpmemctx );
1485                                 if ( !BER_BVISNULL( &v[j] ) ) {
1486                                         j++;
1487                                 }
1488                         }
1489                         if ( j == 0 ) {
1490                                 op->o_tmpfree( v, op->o_tmpmemctx );
1491                                 *vals = NULL;
1492                                 rc = LDAP_INSUFFICIENT_ACCESS;
1493
1494                         } else {
1495                                 BER_BVZERO( &v[j] );
1496                                 *vals = v;
1497                                 rc = LDAP_SUCCESS;
1498                         }
1499                 }
1500 freeit:         if ( e != target ) {
1501                         be_entry_release_r( op, e );
1502                 }
1503                 if ( freeattr ) {
1504                         attr_free( a );
1505                 }
1506         }
1507
1508         op->o_bd = be;
1509         return rc;
1510 }
1511
1512 int
1513 backend_attribute(
1514         Operation *op,
1515         Entry   *target,
1516         struct berval   *edn,
1517         AttributeDescription *entry_at,
1518         BerVarray *vals,
1519         slap_access_t access )
1520 {
1521         int                     rc;
1522         BackendDB               *be_orig;
1523
1524         be_orig = op->o_bd;
1525         op->o_bd = frontendDB;
1526 #ifdef SLAP_OVERLAY_ACCESS
1527         rc = frontendDB->be_attribute( op, target, edn,
1528                 entry_at, vals, access );
1529 #else /* !SLAP_OVERLAY_ACCESS */
1530         rc = fe_acl_attribute( op, target, edn,
1531                 entry_at, vals, access );
1532 #endif /* !SLAP_OVERLAY_ACCESS */
1533         op->o_bd = be_orig;
1534
1535         return rc;
1536 }
1537
1538 int
1539 backend_access(
1540         Operation               *op,
1541         Entry                   *target,
1542         struct berval           *edn,
1543         AttributeDescription    *entry_at,
1544         struct berval           *nval,
1545         slap_access_t           access,
1546         slap_mask_t             *mask )
1547 {
1548         Entry           *e = NULL;
1549         int             rc = LDAP_INSUFFICIENT_ACCESS;
1550         Backend         *be = op->o_bd;
1551
1552         /* pedantic */
1553         assert( op != NULL );
1554         assert( op->o_conn != NULL );
1555         assert( edn != NULL );
1556         assert( access > ACL_NONE );
1557
1558         op->o_bd = select_backend( edn, 0, 0 );
1559
1560         if ( target && dn_match( &target->e_nname, edn ) ) {
1561                 e = target;
1562
1563         } else {
1564                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1565         }
1566
1567         if ( e ) {
1568                 Attribute       *a = NULL;
1569                 int             freeattr = 0;
1570
1571                 if ( entry_at == NULL ) {
1572                         entry_at = slap_schema.si_ad_entry;
1573                 }
1574
1575                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1576                 {
1577                         if ( access_allowed_mask( op, e, entry_at,
1578                                         NULL, access, NULL, mask ) == 0 )
1579                         {
1580                                 rc = LDAP_INSUFFICIENT_ACCESS;
1581
1582                         } else {
1583                                 rc = LDAP_SUCCESS;
1584                         }
1585
1586                 } else {
1587                         a = attr_find( e->e_attrs, entry_at );
1588                         if ( a == NULL ) {
1589                                 SlapReply       rs = { 0 };
1590                                 AttributeName   anlist[ 2 ];
1591
1592                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1593                                 anlist[ 0 ].an_desc = entry_at;
1594                                 BER_BVZERO( &anlist[ 1 ].an_name );
1595                                 rs.sr_attrs = anlist;
1596
1597                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1598
1599                                 /* NOTE: backend_operational() is also called
1600                                  * when returning results, so it's supposed
1601                                  * to do no harm to entries */
1602                                 rs.sr_entry = e;
1603                                 rc = backend_operational( op, &rs );
1604                                 rs.sr_entry = NULL;
1605
1606                                 if ( rc == LDAP_SUCCESS ) {
1607                                         if ( rs.sr_operational_attrs ) {
1608                                                 freeattr = 1;
1609                                                 a = rs.sr_operational_attrs;
1610
1611                                         } else {
1612                                                 rc = LDAP_NO_SUCH_OBJECT;
1613                                         }
1614                                 }
1615                         }
1616
1617                         if ( a ) {
1618                                 if ( access_allowed_mask( op, e, entry_at,
1619                                                 nval, access, NULL, mask ) == 0 )
1620                                 {
1621                                         rc = LDAP_INSUFFICIENT_ACCESS;
1622                                         goto freeit;
1623                                 }
1624                                 rc = LDAP_SUCCESS;
1625                         }
1626                 }
1627 freeit:         if ( e != target ) {
1628                         be_entry_release_r( op, e );
1629                 }
1630                 if ( freeattr ) {
1631                         attr_free( a );
1632                 }
1633         }
1634
1635         op->o_bd = be;
1636         return rc;
1637 }
1638
1639 int
1640 fe_aux_operational(
1641         Operation *op,
1642         SlapReply *rs )
1643 {
1644         Attribute               **ap;
1645         int                     rc = 0;
1646         BackendDB               *be_orig;
1647
1648         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1649                 /* just count them */ ;
1650
1651         /*
1652          * If operational attributes (allegedly) are required,
1653          * and the backend supports specific operational attributes,
1654          * add them to the attribute list
1655          */
1656         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1657                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) )
1658         {
1659                 *ap = slap_operational_entryDN( rs->sr_entry );
1660                 ap = &(*ap)->a_next;
1661         }
1662
1663         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1664                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) )
1665         {
1666                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1667                 ap = &(*ap)->a_next;
1668         }
1669
1670         if ( op->o_bd != NULL )
1671         {
1672                 /* Let the overlays have a chance at this */
1673                 be_orig = op->o_bd;
1674                 op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
1675                 if ( !be_match( op->o_bd, frontendDB ) &&
1676                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1677                         op->o_bd != NULL && op->o_bd->be_operational != NULL )
1678                 {
1679                         rc = op->o_bd->be_operational( op, rs );
1680                 }
1681                 op->o_bd = be_orig;
1682         }
1683
1684         return rc;
1685 }
1686
1687 int backend_operational( Operation *op, SlapReply *rs )
1688 {
1689         int rc;
1690         BackendDB *be_orig;
1691
1692         /* Moved this into the frontend so global overlays are called */
1693
1694         be_orig = op->o_bd;
1695         op->o_bd = frontendDB;
1696         rc = frontendDB->be_operational( op, rs );
1697         op->o_bd = be_orig;
1698
1699         return rc;
1700 }
1701