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 1998-2008 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 "config.h"
  38 #include "lutil.h"
  39 #include "lber_pvt.h"
  40
  41 /*
  42  * If a module is configured as dynamic, its header should not
  43  * get included into slapd. While this is a general rule and does
  44  * not have much of an effect in UNIX, this rule should be adhered
  45  * to for Windows, where dynamic object code should not be implicitly
  46  * imported into slapd without appropriate __declspec(dllimport) directives.
  47  */
  48
  49 int                     nBackendInfo = 0;
  50 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  51
  52 int                     nBackendDB = 0;
  53 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  54
  55 static int
  56 backend_init_controls( BackendInfo *bi )
  57 {
  58         if ( bi->bi_controls ) {
  59                 int     i;
  60
  61                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  62                         int     cid;
  63
  64                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  65                                         == LDAP_CONTROL_NOT_FOUND )
  66                         {
  67                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  68                                         assert( 0 );
  69                                 }
  70
  71                                 return -1;
  72                         }
  73
  74                         bi->bi_ctrls[ cid ] = 1;
  75                 }
  76         }
  77
  78         return 0;
  79 }
  80
  81 int backend_init(void)
  82 {
  83         int rc = -1;
  84         BackendInfo *bi;
  85
  86         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  87                 /* already initialized */
  88                 Debug( LDAP_DEBUG_ANY,
  89                         "backend_init: already initialized\n", 0, 0, 0 );
  90                 return -1;
  91         }
  92
  93         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  94                 assert( bi->bi_init != 0 );
  95
  96                 rc = bi->bi_init( bi );
  97
  98                 if(rc != 0) {
  99                         Debug( LDAP_DEBUG_ANY,
 100                                 "backend_init: initialized for type \"%s\"\n",
 101                                 bi->bi_type, 0, 0 );
 102                         /* destroy those we've already inited */
 103                         for( nBackendInfo--;
 104                                 nBackendInfo >= 0 ;
 105                                 nBackendInfo-- )
 106                         {
 107                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 108                                         slap_binfo[nBackendInfo].bi_destroy(
 109                                                 &slap_binfo[nBackendInfo] );
 110                                 }
 111                         }
 112                         return rc;
 113                 }
 114
 115                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 116         }
 117
 118         if ( nBackendInfo > 0) {
 119                 return 0;
 120         }
 121
 122 #ifdef SLAPD_MODULES
 123         return 0;
 124 #else
 125
 126         Debug( LDAP_DEBUG_ANY,
 127                 "backend_init: failed\n",
 128                 0, 0, 0 );
 129
 130         return rc;
 131 #endif /* SLAPD_MODULES */
 132 }
 133
 134 int backend_add(BackendInfo *aBackendInfo)
 135 {
 136         int rc = 0;
 137
 138         if ( aBackendInfo->bi_init == NULL ) {
 139                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 140                         "backend type \"%s\" does not have the (mandatory)init function\n",
 141                         aBackendInfo->bi_type, 0, 0 );
 142                 return -1;
 143         }
 144
 145         rc = aBackendInfo->bi_init(aBackendInfo);
 146         if ( rc != 0) {
 147                 Debug( LDAP_DEBUG_ANY,
 148                         "backend_add:  initialization for type \"%s\" failed\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return rc;
 151         }
 152
 153         (void)backend_init_controls( aBackendInfo );
 154
 155         /* now add the backend type to the Backend Info List */
 156         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 157         nBackendInfo++;
 158         return 0;
 159 }
 160
 161 static int
 162 backend_set_controls( BackendDB *be )
 163 {
 164         BackendInfo     *bi = be->bd_info;
 165
 166         /* back-relay takes care of itself; so may do other */
 167         if ( overlay_is_over( be ) ) {
 168                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 169         }
 170
 171         if ( bi->bi_controls ) {
 172                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 173                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 174                                         sizeof( be->be_ctrls ) );
 175                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 176
 177                 } else {
 178                         int     i;
 179
 180                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 181                                 if ( bi->bi_ctrls[ i ] ) {
 182                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 183                                 }
 184                         }
 185                 }
 186
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* startup a specific backend database */
 193 int backend_startup_one(Backend *be, ConfigReply *cr)
 194 {
 195         int             rc = 0;
 196
 197         assert( be != NULL );
 198
 199         be->be_pending_csn_list = (struct be_pcl *)
 200                 ch_calloc( 1, sizeof( struct be_pcl ) );
 201
 202         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 203
 204         Debug( LDAP_DEBUG_TRACE,
 205                 "backend_startup_one: starting \"%s\"\n",
 206                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 207                 0, 0 );
 208
 209         /* set database controls */
 210         (void)backend_set_controls( be );
 211
 212 #if 0
 213         if ( !BER_BVISEMPTY( &be->be_rootndn )
 214                 && select_backend( &be->be_rootndn, 0 ) == be
 215                 && BER_BVISNULL( &be->be_rootpw ) )
 216         {
 217                 /* warning: if rootdn entry is created,
 218                  * it can take rootdn privileges;
 219                  * set empty rootpw to prevent */
 220         }
 221 #endif
 222
 223         if ( be->bd_info->bi_db_open ) {
 224                 rc = be->bd_info->bi_db_open( be, cr );
 225                 if ( rc == 0 ) {
 226                         (void)backend_set_controls( be );
 227
 228                 } else {
 229                         Debug( LDAP_DEBUG_ANY,
 230                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 231                                 rc, 0, 0 );
 232                 }
 233         }
 234
 235         return rc;
 236 }
 237
 238 int backend_startup(Backend *be)
 239 {
 240         int i;
 241         int rc = 0;
 242         BackendInfo *bi;
 243         ConfigReply cr={0, ""};
 244
 245         if( ! ( nBackendDB > 0 ) ) {
 246                 /* no databases */
 247                 Debug( LDAP_DEBUG_ANY,
 248                         "backend_startup: %d databases to startup.\n",
 249                         nBackendDB, 0, 0 );
 250                 return 1;
 251         }
 252
 253         if(be != NULL) {
 254                 if ( be->bd_info->bi_open ) {
 255                         rc = be->bd_info->bi_open( be->bd_info );
 256                         if ( rc != 0 ) {
 257                                 Debug( LDAP_DEBUG_ANY,
 258                                         "backend_startup: bi_open failed!\n",
 259                                         0, 0, 0 );
 260
 261                                 return rc;
 262                         }
 263                 }
 264                 /* append global access controls */
 265                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 266
 267                 return backend_startup_one( be, &cr );
 268         }
 269
 270         /* open frontend, if required */
 271         if ( frontendDB->bd_info->bi_db_open ) {
 272                 rc = frontendDB->bd_info->bi_db_open( frontendDB, NULL );
 273                 if ( rc != 0 ) {
 274                         Debug( LDAP_DEBUG_ANY,
 275                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 276                                 rc, 0, 0 );
 277                         return rc;
 278                 }
 279         }
 280
 281         /* open each backend type */
 282         i = -1;
 283         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 284                 i++;
 285                 if( bi->bi_nDB == 0) {
 286                         /* no database of this type, don't open */
 287                         continue;
 288                 }
 289
 290                 if( bi->bi_open ) {
 291                         rc = bi->bi_open( bi );
 292                         if ( rc != 0 ) {
 293                                 Debug( LDAP_DEBUG_ANY,
 294                                         "backend_startup: bi_open %d (%s) failed!\n",
 295                                         i, bi->bi_type, 0 );
 296                                 return rc;
 297                         }
 298                 }
 299
 300                 (void)backend_init_controls( bi );
 301         }
 302
 303         /* open each backend database */
 304         i = -1;
 305         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 306                 i++;
 307                 if ( be->be_suffix == NULL ) {
 308                         Debug( LDAP_DEBUG_ANY,
 309                                 "backend_startup: warning, database %d (%s) "
 310                                 "has no suffix\n",
 311                                 i, be->bd_info->bi_type, 0 );
 312                 }
 313                 /* append global access controls */
 314                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 315
 316                 rc = backend_startup_one( be, &cr );
 317
 318                 if ( rc ) return rc;
 319         }
 320
 321         return rc;
 322 }
 323
 324 int backend_num( Backend *be )
 325 {
 326         int i = 0;
 327         BackendDB *b2;
 328
 329         if( be == NULL ) return -1;
 330
 331         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 332                 if( be == b2 ) return i;
 333                 i++;
 334         }
 335         return -1;
 336 }
 337
 338 int backend_shutdown( Backend *be )
 339 {
 340         int rc = 0;
 341         BackendInfo *bi;
 342
 343         if( be != NULL ) {
 344                 /* shutdown a specific backend database */
 345
 346                 if ( be->bd_info->bi_nDB == 0 ) {
 347                         /* no database of this type, we never opened it */
 348                         return 0;
 349                 }
 350
 351                 if ( be->bd_info->bi_db_close ) {
 352                         be->bd_info->bi_db_close( be, NULL );
 353                 }
 354
 355                 if( be->bd_info->bi_close ) {
 356                         be->bd_info->bi_close( be->bd_info );
 357                 }
 358
 359                 return 0;
 360         }
 361
 362         /* close each backend database */
 363         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 364                 if ( be->bd_info->bi_db_close ) {
 365                         be->bd_info->bi_db_close( be, NULL );
 366                 }
 367
 368                 if(rc != 0) {
 369                         Debug( LDAP_DEBUG_ANY,
 370                                 "backend_close: bi_db_close %s failed!\n",
 371                                 be->be_type, 0, 0 );
 372                 }
 373         }
 374
 375         /* close each backend type */
 376         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 377                 if( bi->bi_nDB == 0 ) {
 378                         /* no database of this type */
 379                         continue;
 380                 }
 381
 382                 if( bi->bi_close ) {
 383                         bi->bi_close( bi );
 384                 }
 385         }
 386
 387         /* close frontend, if required */
 388         if ( frontendDB->bd_info->bi_db_close ) {
 389                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 390                 if ( rc != 0 ) {
 391                         Debug( LDAP_DEBUG_ANY,
 392                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 393                                 rc, 0, 0 );
 394                 }
 395         }
 396
 397         return 0;
 398 }
 399
 400 /*
 401  * This function is supposed to be the exact counterpart
 402  * of backend_startup_one(), although this one calls bi_db_destroy()
 403  * while backend_startup_one() calls bi_db_open().
 404  *
 405  * Make sure backend_stopdown_one() destroys resources allocated
 406  * by backend_startup_one(); only call backend_destroy_one() when
 407  * all stuff in a BackendDB needs to be destroyed
 408  */
 409 void
 410 backend_stopdown_one( BackendDB *bd )
 411 {
 412         if ( bd->be_pending_csn_list ) {
 413                 struct slap_csn_entry *csne;
 414                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 415                 while ( csne ) {
 416                         struct slap_csn_entry *tmp_csne = csne;
 417
 418                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 419                         ch_free( csne->ce_csn.bv_val );
 420                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 421                         ch_free( tmp_csne );
 422                 }
 423                 ch_free( bd->be_pending_csn_list );
 424         }
 425
 426         if ( bd->bd_info->bi_db_destroy ) {
 427                 bd->bd_info->bi_db_destroy( bd, NULL );
 428         }
 429 }
 430
 431 void backend_destroy_one( BackendDB *bd, int dynamic )
 432 {
 433         if ( dynamic ) {
 434                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 435         }
 436
 437         if ( bd->be_syncinfo ) {
 438                 syncinfo_free( bd->be_syncinfo, 1 );
 439         }
 440
 441         backend_stopdown_one( bd );
 442
 443         ber_bvarray_free( bd->be_suffix );
 444         ber_bvarray_free( bd->be_nsuffix );
 445         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 446                 free( bd->be_rootdn.bv_val );
 447         }
 448         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 449                 free( bd->be_rootndn.bv_val );
 450         }
 451         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 452                 free( bd->be_rootpw.bv_val );
 453         }
 454         acl_destroy( bd->be_acl, frontendDB->be_acl );
 455         limits_destroy( bd->be_limits );
 456         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 457                 ch_free( bd->be_update_ndn.bv_val );
 458         }
 459         if ( bd->be_update_refs ) {
 460                 ber_bvarray_free( bd->be_update_refs );
 461         }
 462
 463         if ( dynamic ) {
 464                 free( bd );
 465         }
 466 }
 467
 468 int backend_destroy(void)
 469 {
 470         BackendDB *bd;
 471         BackendInfo *bi;
 472
 473         /* destroy each backend database */
 474         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 475                 backend_destroy_one( bd, 1 );
 476         }
 477
 478         /* destroy each backend type */
 479         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 480                 if( bi->bi_destroy ) {
 481                         bi->bi_destroy( bi );
 482                 }
 483         }
 484
 485         nBackendInfo = 0;
 486         LDAP_STAILQ_INIT(&backendInfo);
 487
 488         /* destroy frontend database */
 489         bd = frontendDB;
 490         if ( bd ) {
 491                 if ( bd->bd_info->bi_db_destroy ) {
 492                         bd->bd_info->bi_db_destroy( bd, NULL );
 493                 }
 494                 ber_bvarray_free( bd->be_suffix );
 495                 ber_bvarray_free( bd->be_nsuffix );
 496                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 497                         free( bd->be_rootdn.bv_val );
 498                 }
 499                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 500                         free( bd->be_rootndn.bv_val );
 501                 }
 502                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 503                         free( bd->be_rootpw.bv_val );
 504                 }
 505                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 506         }
 507
 508         return 0;
 509 }
 510
 511 BackendInfo* backend_info(const char *type)
 512 {
 513         BackendInfo *bi;
 514
 515         /* search for the backend type */
 516         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 517                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 518                         return bi;
 519                 }
 520         }
 521
 522         return NULL;
 523 }
 524
 525 void
 526 backend_db_insert(
 527         BackendDB *be,
 528         int idx
 529 )
 530 {
 531         /* If idx < 0, just add to end of list */
 532         if ( idx < 0 ) {
 533                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 534         } else if ( idx == 0 ) {
 535                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 536         } else {
 537                 int i;
 538                 BackendDB *b2;
 539
 540                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 541                 idx--;
 542                 for (i=0; i<idx; i++) {
 543                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 544                 }
 545                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 546         }
 547 }
 548
 549 void
 550 backend_db_move(
 551         BackendDB *be,
 552         int idx
 553 )
 554 {
 555         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 556         backend_db_insert(be, idx);
 557 }
 558
 559 BackendDB *
 560 backend_db_init(
 561     const char  *type,
 562         BackendDB *b0,
 563         int idx,
 564         ConfigReply *cr)
 565 {
 566         BackendInfo *bi = backend_info(type);
 567         BackendDB *be = b0;
 568         int     rc = 0;
 569
 570         if( bi == NULL ) {
 571                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 572                 return NULL;
 573         }
 574
 575         /* If be is provided, treat it as private. Otherwise allocate
 576          * one and add it to the global list.
 577          */
 578         if ( !be ) {
 579                 be = ch_calloc( 1, sizeof(Backend) );
 580                 /* Just append */
 581                 if ( idx >= nbackends )
 582                         idx = -1;
 583                 nbackends++;
 584                 backend_db_insert( be, idx );
 585         }
 586
 587         be->bd_info = bi;
 588
 589         be->be_def_limit = frontendDB->be_def_limit;
 590         be->be_dfltaccess = frontendDB->be_dfltaccess;
 591
 592         be->be_restrictops = frontendDB->be_restrictops;
 593         be->be_requires = frontendDB->be_requires;
 594         be->be_ssf_set = frontendDB->be_ssf_set;
 595
 596         be->be_pcl_mutexp = &be->be_pcl_mutex;
 597         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 598
 599         /* assign a default depth limit for alias deref */
 600         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 601
 602         if ( bi->bi_db_init ) {
 603                 rc = bi->bi_db_init( be, cr );
 604         }
 605
 606         if ( rc != 0 ) {
 607                 fprintf( stderr, "database init failed (%s)\n", type );
 608                 /* If we created and linked this be, remove it and free it */
 609                 if ( !b0 ) {
 610                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 611                         ch_free( be );
 612                         be = NULL;
 613                         nbackends--;
 614                 }
 615         } else {
 616                 bi->bi_nDB++;
 617         }
 618         return( be );
 619 }
 620
 621 void
 622 be_db_close( void )
 623 {
 624         BackendDB *be;
 625
 626         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 627                 if ( be->bd_info->bi_db_close ) {
 628                         be->bd_info->bi_db_close( be, NULL );
 629                 }
 630         }
 631
 632         if ( frontendDB->bd_info->bi_db_close ) {
 633                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 634         }
 635
 636 }
 637
 638 Backend *
 639 select_backend(
 640         struct berval * dn,
 641         int noSubs )
 642 {
 643         int             j;
 644         ber_len_t       len, dnlen = dn->bv_len;
 645         Backend         *be;
 646
 647         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 648                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 649                         continue;
 650                 }
 651
 652                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 653                 {
 654                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 655                         {
 656                                 continue;
 657                         }
 658
 659                         len = be->be_nsuffix[j].bv_len;
 660
 661                         if ( len > dnlen ) {
 662                                 /* suffix is longer than DN */
 663                                 continue;
 664                         }
 665
 666                         /*
 667                          * input DN is normalized, so the separator check
 668                          * need not look at escaping
 669                          */
 670                         if ( len && len < dnlen &&
 671                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 672                         {
 673                                 continue;
 674                         }
 675
 676                         if ( strcmp( be->be_nsuffix[j].bv_val,
 677                                 &dn->bv_val[dnlen-len] ) == 0 )
 678                         {
 679                                 return be;
 680                         }
 681                 }
 682         }
 683
 684         return be;
 685 }
 686
 687 int
 688 be_issuffix(
 689     Backend *be,
 690     struct berval *bvsuffix )
 691 {
 692         int     i;
 693
 694         if ( be->be_nsuffix == NULL ) {
 695                 return 0;
 696         }
 697
 698         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 699                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 700                         return 1;
 701                 }
 702         }
 703
 704         return 0;
 705 }
 706
 707 int
 708 be_issubordinate(
 709     Backend *be,
 710     struct berval *bvsubordinate )
 711 {
 712         int     i;
 713
 714         if ( be->be_nsuffix == NULL ) {
 715                 return 0;
 716         }
 717
 718         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 719                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 720                         return 1;
 721                 }
 722         }
 723
 724         return 0;
 725 }
 726
 727 int
 728 be_isroot_dn( Backend *be, struct berval *ndn )
 729 {
 730         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 731                 return 0;
 732         }
 733
 734         return dn_match( &be->be_rootndn, ndn );
 735 }
 736
 737 int
 738 be_slurp_update( Operation *op )
 739 {
 740         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 741                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 742 }
 743
 744 int
 745 be_shadow_update( Operation *op )
 746 {
 747         /* This assumes that all internal ops (connid == -1) on a syncrepl
 748          * database are syncrepl operations.
 749          */
 750         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 751                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 752 }
 753
 754 int
 755 be_isupdate_dn( Backend *be, struct berval *ndn )
 756 {
 757         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 758                 return 0;
 759         }
 760
 761         return dn_match( &be->be_update_ndn, ndn );
 762 }
 763
 764 struct berval *
 765 be_root_dn( Backend *be )
 766 {
 767         return &be->be_rootdn;
 768 }
 769
 770 int
 771 be_isroot( Operation *op )
 772 {
 773         return be_isroot_dn( op->o_bd, &op->o_ndn );
 774 }
 775
 776 int
 777 be_isroot_pw( Operation *op )
 778 {
 779         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 780 }
 781
 782 /*
 783  * checks if binding as rootdn
 784  *
 785  * return value:
 786  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 787  *      LDAP_SUCCESS                    if rootdn & rootpw
 788  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 789  *
 790  * if rs != NULL
 791  *      if LDAP_SUCCESS, op->orb_edn is set
 792  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 793  */
 794 int
 795 be_rootdn_bind( Operation *op, SlapReply *rs )
 796 {
 797         int             rc;
 798 #ifdef SLAPD_SPASSWD
 799         void    *old_authctx = NULL;
 800 #endif
 801
 802         assert( op->o_tag == LDAP_REQ_BIND );
 803         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 804
 805         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 806                 return SLAP_CB_CONTINUE;
 807         }
 808
 809         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 810                 /* give the database a chance */
 811                 return SLAP_CB_CONTINUE;
 812         }
 813
 814         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 815                 /* rootdn bind explicitly disallowed */
 816                 rc = LDAP_INVALID_CREDENTIALS;
 817                 if ( rs ) {
 818                         goto send_result;
 819                 }
 820
 821                 return rc;
 822         }
 823
 824 #ifdef SLAPD_SPASSWD
 825         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 826                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 827 #endif
 828
 829         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 830
 831 #ifdef SLAPD_SPASSWD
 832         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 833                 old_authctx, 0, NULL, NULL );
 834 #endif
 835
 836         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 837         if ( rs ) {
 838 send_result:;
 839                 rs->sr_err = rc;
 840
 841                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 842                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 843                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 844
 845                 if ( rc == LDAP_SUCCESS ) {
 846                         /* Set to the pretty rootdn */
 847                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 848
 849                 } else {
 850                         send_ldap_result( op, rs );
 851                 }
 852         }
 853
 854         return rc;
 855 }
 856
 857 int
 858 be_entry_release_rw(
 859         Operation *op,
 860         Entry *e,
 861         int rw )
 862 {
 863         if ( op->o_bd->be_release ) {
 864                 /* free and release entry from backend */
 865                 return op->o_bd->be_release( op, e, rw );
 866         } else {
 867                 /* free entry */
 868                 entry_free( e );
 869                 return 0;
 870         }
 871 }
 872
 873 int
 874 backend_unbind( Operation *op, SlapReply *rs )
 875 {
 876         BackendDB *be;
 877
 878         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 879                 if ( be->be_unbind ) {
 880                         op->o_bd = be;
 881                         be->be_unbind( op, rs );
 882                 }
 883         }
 884
 885         return 0;
 886 }
 887
 888 int
 889 backend_connection_init(
 890         Connection   *conn )
 891 {
 892         BackendDB *be;
 893
 894         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 895                 if ( be->be_connection_init ) {
 896                         be->be_connection_init( be, conn );
 897                 }
 898         }
 899
 900         return 0;
 901 }
 902
 903 int
 904 backend_connection_destroy(
 905         Connection   *conn )
 906 {
 907         BackendDB *be;
 908
 909         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 910                 if ( be->be_connection_destroy ) {
 911                         be->be_connection_destroy( be, conn);
 912                 }
 913         }
 914
 915         return 0;
 916 }
 917
 918 int
 919 backend_check_controls(
 920         Operation *op,
 921         SlapReply *rs )
 922 {
 923         LDAPControl **ctrls = op->o_ctrls;
 924         rs->sr_err = LDAP_SUCCESS;
 925
 926         if( ctrls ) {
 927                 for( ; *ctrls != NULL ; ctrls++ ) {
 928                         int cid;
 929
 930                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 931                         case LDAP_CONTROL_NOT_FOUND:
 932                                 /* unrecognized control */
 933                                 if ( (*ctrls)->ldctl_iscritical ) {
 934                                         /* should not be reachable */
 935                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 936                                                 "unrecognized critical control: %s\n",
 937                                                 (*ctrls)->ldctl_oid, 0, 0 );
 938                                         assert( 0 );
 939                                 } else {
 940                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 941                                                 "unrecognized non-critical control: %s\n",
 942                                                 (*ctrls)->ldctl_oid, 0, 0 );
 943                                 }
 944                                 break;
 945
 946                         case LDAP_COMPARE_FALSE:
 947                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 948                                         /* RFC 4511 allows unavailableCriticalExtension to be
 949                                          * returned when the server is unwilling to perform
 950                                          * an operation extended by a recognized critical
 951                                          * control.
 952                                          */
 953                                         rs->sr_text = "critical control unavailable in context";
 954                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 955                                         goto done;
 956                                 }
 957                                 break;
 958
 959                         case LDAP_COMPARE_TRUE:
 960                                 break;
 961
 962                         default:
 963                                 /* unreachable */
 964                                 Debug( LDAP_DEBUG_ANY,
 965                                         "backend_check_controls: unable to check control: %s\n",
 966                                         (*ctrls)->ldctl_oid, 0, 0 );
 967                                 assert( 0 );
 968
 969                                 rs->sr_text = "unable to check control";
 970                                 rs->sr_err = LDAP_OTHER;
 971                                 goto done;
 972                         }
 973                 }
 974         }
 975
 976 #if 0 /* temporarily removed */
 977         /* check should be generalized */
 978         if( get_relax(op) && !be_isroot(op)) {
 979                 rs->sr_text = "requires manager authorization";
 980                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 981         }
 982 #endif
 983
 984 done:;
 985         return rs->sr_err;
 986 }
 987
 988 int
 989 backend_check_restrictions(
 990         Operation *op,
 991         SlapReply *rs,
 992         struct berval *opdata )
 993 {
 994         slap_mask_t restrictops;
 995         slap_mask_t requires;
 996         slap_mask_t opflag;
 997         slap_mask_t exopflag = 0;
 998         slap_ssf_set_t *ssf;
 999         int updateop = 0;
1000         int starttls = 0;
1001         int session = 0;
1002
1003         if ( op->o_bd ) {
1004                 int     rc = SLAP_CB_CONTINUE;
1005
1006                 if ( op->o_bd->be_chk_controls ) {
1007                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1008                 }
1009
1010                 if ( rc == SLAP_CB_CONTINUE ) {
1011                         rc = backend_check_controls( op, rs );
1012                 }
1013
1014                 if ( rc != LDAP_SUCCESS ) {
1015                         return rs->sr_err;
1016                 }
1017
1018                 restrictops = op->o_bd->be_restrictops;
1019                 requires = op->o_bd->be_requires;
1020                 ssf = &op->o_bd->be_ssf_set;
1021
1022         } else {
1023                 restrictops = frontendDB->be_restrictops;
1024                 requires = frontendDB->be_requires;
1025                 ssf = &frontendDB->be_ssf_set;
1026         }
1027
1028         switch( op->o_tag ) {
1029         case LDAP_REQ_ADD:
1030                 opflag = SLAP_RESTRICT_OP_ADD;
1031                 updateop++;
1032                 break;
1033         case LDAP_REQ_BIND:
1034                 opflag = SLAP_RESTRICT_OP_BIND;
1035                 session++;
1036                 break;
1037         case LDAP_REQ_COMPARE:
1038                 opflag = SLAP_RESTRICT_OP_COMPARE;
1039                 break;
1040         case LDAP_REQ_DELETE:
1041                 updateop++;
1042                 opflag = SLAP_RESTRICT_OP_DELETE;
1043                 break;
1044         case LDAP_REQ_EXTENDED:
1045                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1046
1047                 if( !opdata ) {
1048                         /* treat unspecified as a modify */
1049                         opflag = SLAP_RESTRICT_OP_MODIFY;
1050                         updateop++;
1051                         break;
1052                 }
1053
1054                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1055                         session++;
1056                         starttls++;
1057                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1058                         break;
1059                 }
1060
1061                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1062                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1063                         break;
1064                 }
1065
1066                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1067                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1068                         break;
1069                 }
1070
1071                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1072                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1073                         updateop++;
1074                         break;
1075                 }
1076
1077                 /* treat everything else as a modify */
1078                 opflag = SLAP_RESTRICT_OP_MODIFY;
1079                 updateop++;
1080                 break;
1081
1082         case LDAP_REQ_MODIFY:
1083                 updateop++;
1084                 opflag = SLAP_RESTRICT_OP_MODIFY;
1085                 break;
1086         case LDAP_REQ_RENAME:
1087                 updateop++;
1088                 opflag = SLAP_RESTRICT_OP_RENAME;
1089                 break;
1090         case LDAP_REQ_SEARCH:
1091                 opflag = SLAP_RESTRICT_OP_SEARCH;
1092                 break;
1093         case LDAP_REQ_UNBIND:
1094                 session++;
1095                 opflag = 0;
1096                 break;
1097         default:
1098                 rs->sr_text = "restrict operations internal error";
1099                 rs->sr_err = LDAP_OTHER;
1100                 return rs->sr_err;
1101         }
1102
1103         if ( !starttls ) {
1104                 /* these checks don't apply to StartTLS */
1105
1106                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1107                 if( op->o_transport_ssf < ssf->sss_transport ) {
1108                         rs->sr_text = op->o_transport_ssf
1109                                 ? "stronger transport confidentiality required"
1110                                 : "transport confidentiality required";
1111                         return rs->sr_err;
1112                 }
1113
1114                 if( op->o_tls_ssf < ssf->sss_tls ) {
1115                         rs->sr_text = op->o_tls_ssf
1116                                 ? "stronger TLS confidentiality required"
1117                                 : "TLS confidentiality required";
1118                         return rs->sr_err;
1119                 }
1120
1121
1122                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1123                         /* simple bind specific check */
1124                         if( op->o_ssf < ssf->sss_simple_bind ) {
1125                                 rs->sr_text = op->o_ssf
1126                                         ? "stronger confidentiality required"
1127                                         : "confidentiality required";
1128                                 return rs->sr_err;
1129                         }
1130                 }
1131
1132                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1133                         /* these checks don't apply to SASL bind */
1134
1135                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1136                                 rs->sr_text = op->o_sasl_ssf
1137                                         ? "stronger SASL confidentiality required"
1138                                         : "SASL confidentiality required";
1139                                 return rs->sr_err;
1140                         }
1141
1142                         if( op->o_ssf < ssf->sss_ssf ) {
1143                                 rs->sr_text = op->o_ssf
1144                                         ? "stronger confidentiality required"
1145                                         : "confidentiality required";
1146                                 return rs->sr_err;
1147                         }
1148                 }
1149
1150                 if( updateop ) {
1151                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1152                                 rs->sr_text = op->o_transport_ssf
1153                                         ? "stronger transport confidentiality required for update"
1154                                         : "transport confidentiality required for update";
1155                                 return rs->sr_err;
1156                         }
1157
1158                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1159                                 rs->sr_text = op->o_tls_ssf
1160                                         ? "stronger TLS confidentiality required for update"
1161                                         : "TLS confidentiality required for update";
1162                                 return rs->sr_err;
1163                         }
1164
1165                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1166                                 rs->sr_text = op->o_sasl_ssf
1167                                         ? "stronger SASL confidentiality required for update"
1168                                         : "SASL confidentiality required for update";
1169                                 return rs->sr_err;
1170                         }
1171
1172                         if( op->o_ssf < ssf->sss_update_ssf ) {
1173                                 rs->sr_text = op->o_ssf
1174                                         ? "stronger confidentiality required for update"
1175                                         : "confidentiality required for update";
1176                                 return rs->sr_err;
1177                         }
1178
1179                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1180                                 BER_BVISEMPTY( &op->o_ndn ) )
1181                         {
1182                                 rs->sr_text = "modifications require authentication";
1183                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1184                                 return rs->sr_err;
1185                         }
1186
1187 #ifdef SLAP_X_LISTENER_MOD
1188                         if ( op->o_conn->c_listener &&
1189                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1190                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1191                         {
1192                                 /* no "w" mode means readonly */
1193                                 rs->sr_text = "modifications not allowed on this listener";
1194                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1195                                 return rs->sr_err;
1196                         }
1197 #endif /* SLAP_X_LISTENER_MOD */
1198                 }
1199         }
1200
1201         if ( !session ) {
1202                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1203
1204                 if( requires & SLAP_REQUIRE_STRONG ) {
1205                         /* should check mechanism */
1206                         if( ( op->o_transport_ssf < ssf->sss_transport
1207                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1208                                 || BER_BVISEMPTY( &op->o_dn ) )
1209                         {
1210                                 rs->sr_text = "strong(er) authentication required";
1211                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1212                                 return rs->sr_err;
1213                         }
1214                 }
1215
1216                 if( requires & SLAP_REQUIRE_SASL ) {
1217                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1218                                 rs->sr_text = "SASL authentication required";
1219                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1220                                 return rs->sr_err;
1221                         }
1222                 }
1223
1224                 if( requires & SLAP_REQUIRE_AUTHC ) {
1225                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1226                                 rs->sr_text = "authentication required";
1227                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1228                                 return rs->sr_err;
1229                         }
1230                 }
1231
1232                 if( requires & SLAP_REQUIRE_BIND ) {
1233                         int version;
1234                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1235                         version = op->o_conn->c_protocol;
1236                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1237
1238                         if( !version ) {
1239                                 /* no bind has occurred */
1240                                 rs->sr_text = "BIND required";
1241                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1242                                 return rs->sr_err;
1243                         }
1244                 }
1245
1246                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1247                         if( op->o_protocol < LDAP_VERSION3 ) {
1248                                 /* no bind has occurred */
1249                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1250                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1251                                 return rs->sr_err;
1252                         }
1253                 }
1254
1255 #ifdef SLAP_X_LISTENER_MOD
1256                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1257                         if ( op->o_conn->c_listener &&
1258                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1259                 {
1260                                 /* no "x" mode means bind required */
1261                                 rs->sr_text = "bind required on this listener";
1262                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1263                                 return rs->sr_err;
1264                         }
1265                 }
1266
1267                 if ( !starttls && !updateop ) {
1268                         if ( op->o_conn->c_listener &&
1269                                 !( op->o_conn->c_listener->sl_perms &
1270                                         ( !BER_BVISEMPTY( &op->o_dn )
1271                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1272                         {
1273                                 /* no "r" mode means no read */
1274                                 rs->sr_text = "read not allowed on this listener";
1275                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1276                                 return rs->sr_err;
1277                         }
1278                 }
1279 #endif /* SLAP_X_LISTENER_MOD */
1280
1281         }
1282
1283         if( ( restrictops & opflag )
1284                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1285                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1286                         rs->sr_text = "read operations restricted";
1287                 } else if ( restrictops & exopflag ) {
1288                         rs->sr_text = "extended operation restricted";
1289                 } else {
1290                         rs->sr_text = "operation restricted";
1291                 }
1292                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1293                 return rs->sr_err;
1294         }
1295
1296         rs->sr_err = LDAP_SUCCESS;
1297         return rs->sr_err;
1298 }
1299
1300 int backend_check_referrals( Operation *op, SlapReply *rs )
1301 {
1302         rs->sr_err = LDAP_SUCCESS;
1303
1304         if( op->o_bd->be_chk_referrals ) {
1305                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1306
1307                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1308                         send_ldap_result( op, rs );
1309                 }
1310         }
1311
1312         return rs->sr_err;
1313 }
1314
1315 int
1316 be_entry_get_rw(
1317         Operation *op,
1318         struct berval *ndn,
1319         ObjectClass *oc,
1320         AttributeDescription *at,
1321         int rw,
1322         Entry **e )
1323 {
1324         *e = NULL;
1325
1326         if ( op->o_bd == NULL ) {
1327                 return LDAP_NO_SUCH_OBJECT;
1328         }
1329
1330         if ( op->o_bd->be_fetch ) {
1331                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1332         }
1333
1334         return LDAP_UNWILLING_TO_PERFORM;
1335 }
1336
1337 int
1338 fe_acl_group(
1339         Operation *op,
1340         Entry   *target,
1341         struct berval *gr_ndn,
1342         struct berval *op_ndn,
1343         ObjectClass *group_oc,
1344         AttributeDescription *group_at )
1345 {
1346         Entry *e;
1347         void *o_priv = op->o_private, *e_priv = NULL;
1348         Attribute *a;
1349         int rc;
1350         GroupAssertion *g;
1351         Backend *be = op->o_bd;
1352
1353         op->o_bd = select_backend( gr_ndn, 0 );
1354
1355         for ( g = op->o_groups; g; g = g->ga_next ) {
1356                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1357                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1358                 {
1359                         continue;
1360                 }
1361                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1362                         break;
1363                 }
1364         }
1365
1366         if ( g ) {
1367                 rc = g->ga_res;
1368                 goto done;
1369         }
1370
1371         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1372                 e = target;
1373                 rc = 0;
1374
1375         } else {
1376                 op->o_private = NULL;
1377                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1378                 e_priv = op->o_private;
1379                 op->o_private = o_priv;
1380         }
1381
1382         if ( e ) {
1383                 a = attr_find( e->e_attrs, group_at );
1384                 if ( a ) {
1385                         /* If the attribute is a subtype of labeledURI,
1386                          * treat this as a dynamic group ala groupOfURLs
1387                          */
1388                         if ( is_at_subtype( group_at->ad_type,
1389                                 slap_schema.si_ad_labeledURI->ad_type ) )
1390                         {
1391                                 int i;
1392                                 LDAPURLDesc *ludp;
1393                                 struct berval bv, nbase;
1394                                 Filter *filter;
1395                                 Entry *user = NULL;
1396                                 void *user_priv = NULL;
1397                                 Backend *b2 = op->o_bd;
1398
1399                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1400                                         user = target;
1401                                 }
1402
1403                                 rc = LDAP_COMPARE_FALSE;
1404                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1405                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1406                                                 LDAP_URL_SUCCESS )
1407                                         {
1408                                                 continue;
1409                                         }
1410
1411                                         BER_BVZERO( &nbase );
1412
1413                                         /* host, attrs and extensions parts must be empty */
1414                                         if ( ( ludp->lud_host && *ludp->lud_host )
1415                                                 || ludp->lud_attrs
1416                                                 || ludp->lud_exts )
1417                                         {
1418                                                 goto loopit;
1419                                         }
1420
1421                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1422                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1423                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1424                                         {
1425                                                 goto loopit;
1426                                         }
1427
1428                                         switch ( ludp->lud_scope ) {
1429                                         case LDAP_SCOPE_BASE:
1430                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1431                                                         goto loopit;
1432                                                 }
1433                                                 break;
1434                                         case LDAP_SCOPE_ONELEVEL:
1435                                                 dnParent( op_ndn, &bv );
1436                                                 if ( !dn_match( &nbase, &bv ) ) {
1437                                                         goto loopit;
1438                                                 }
1439                                                 break;
1440                                         case LDAP_SCOPE_SUBTREE:
1441                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1442                                                         goto loopit;
1443                                                 }
1444                                                 break;
1445                                         case LDAP_SCOPE_SUBORDINATE:
1446                                                 if ( dn_match( &nbase, op_ndn ) ||
1447                                                         !dnIsSuffix( op_ndn, &nbase ) )
1448                                                 {
1449                                                         goto loopit;
1450                                                 }
1451                                         }
1452
1453                                         /* NOTE: this could be NULL
1454                                          * if no filter is provided,
1455                                          * or if filter parsing fails.
1456                                          * In the latter case,
1457                                          * we should give up. */
1458                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1459                                                 filter = str2filter_x( op, ludp->lud_filter );
1460                                                 if ( filter == NULL ) {
1461                                                         /* give up... */
1462                                                         rc = LDAP_OTHER;
1463                                                         goto loopit;
1464                                                 }
1465
1466                                                 /* only get user if required
1467                                                  * and not available yet */
1468                                                 if ( user == NULL ) {
1469                                                         int rc2;
1470
1471                                                         op->o_bd = select_backend( op_ndn, 0 );
1472                                                         op->o_private = NULL;
1473                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1474                                                         user_priv = op->o_private;
1475                                                         op->o_private = o_priv;
1476                                                         if ( rc2 != 0 ) {
1477                                                                 /* give up... */
1478                                                                 rc = LDAP_OTHER;
1479                                                                 goto loopit;
1480                                                         }
1481                                                 }
1482
1483                                                 if ( test_filter( NULL, user, filter ) ==
1484                                                         LDAP_COMPARE_TRUE )
1485                                                 {
1486                                                         rc = 0;
1487                                                 }
1488                                                 filter_free_x( op, filter );
1489                                         }
1490 loopit:
1491                                         ldap_free_urldesc( ludp );
1492                                         if ( !BER_BVISNULL( &nbase ) ) {
1493                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1494                                         }
1495                                         if ( rc != LDAP_COMPARE_FALSE ) {
1496                                                 break;
1497                                         }
1498                                 }
1499
1500                                 if ( user != NULL && user != target ) {
1501                                         op->o_private = user_priv;
1502                                         be_entry_release_r( op, user );
1503                                         op->o_private = o_priv;
1504                                 }
1505                                 op->o_bd = b2;
1506
1507                         } else {
1508                                 rc = attr_valfind( a,
1509                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1510                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1511                                         op_ndn, NULL, op->o_tmpmemctx );
1512                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1513                                         rc = LDAP_COMPARE_FALSE;
1514                                 }
1515                         }
1516
1517                 } else {
1518                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1519                 }
1520
1521                 if ( e != target ) {
1522                         op->o_private = e_priv;
1523                         be_entry_release_r( op, e );
1524                         op->o_private = o_priv;
1525                 }
1526
1527         } else {
1528                 rc = LDAP_NO_SUCH_OBJECT;
1529         }
1530
1531         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1532                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1533                         op->o_tmpmemctx );
1534                 g->ga_be = op->o_bd;
1535                 g->ga_oc = group_oc;
1536                 g->ga_at = group_at;
1537                 g->ga_res = rc;
1538                 g->ga_len = gr_ndn->bv_len;
1539                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1540                 g->ga_next = op->o_groups;
1541                 op->o_groups = g;
1542         }
1543
1544 done:
1545         op->o_bd = be;
1546         return rc;
1547 }
1548
1549 int
1550 backend_group(
1551         Operation *op,
1552         Entry   *target,
1553         struct berval *gr_ndn,
1554         struct berval *op_ndn,
1555         ObjectClass *group_oc,
1556         AttributeDescription *group_at )
1557 {
1558         int                     rc;
1559         BackendDB               *be_orig;
1560
1561         if ( op->o_abandon ) {
1562                 return SLAPD_ABANDON;
1563         }
1564
1565         be_orig = op->o_bd;
1566         op->o_bd = frontendDB;
1567         rc = frontendDB->be_group( op, target, gr_ndn,
1568                 op_ndn, group_oc, group_at );
1569         op->o_bd = be_orig;
1570
1571         return rc;
1572 }
1573
1574 int
1575 fe_acl_attribute(
1576         Operation *op,
1577         Entry   *target,
1578         struct berval   *edn,
1579         AttributeDescription *entry_at,
1580         BerVarray *vals,
1581         slap_access_t access )
1582 {
1583         Entry                   *e = NULL;
1584         void                    *o_priv = op->o_private, *e_priv = NULL;
1585         Attribute               *a = NULL;
1586         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1587         AccessControlState      acl_state = ACL_STATE_INIT;
1588         Backend                 *be = op->o_bd;
1589
1590         op->o_bd = select_backend( edn, 0 );
1591
1592         if ( target && dn_match( &target->e_nname, edn ) ) {
1593                 e = target;
1594
1595         } else {
1596                 op->o_private = NULL;
1597                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1598                 e_priv = op->o_private;
1599                 op->o_private = o_priv;
1600         }
1601
1602         if ( e ) {
1603                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1604                         assert( vals == NULL );
1605
1606                         rc = LDAP_SUCCESS;
1607                         if ( op->o_conn && access > ACL_NONE &&
1608                                 access_allowed( op, e, entry_at, NULL,
1609                                                 access, &acl_state ) == 0 )
1610                         {
1611                                 rc = LDAP_INSUFFICIENT_ACCESS;
1612                         }
1613                         goto freeit;
1614                 }
1615
1616                 a = attr_find( e->e_attrs, entry_at );
1617                 if ( a == NULL ) {
1618                         SlapReply       rs = { 0 };
1619                         AttributeName   anlist[ 2 ];
1620
1621                         anlist[ 0 ].an_name = entry_at->ad_cname;
1622                         anlist[ 0 ].an_desc = entry_at;
1623                         BER_BVZERO( &anlist[ 1 ].an_name );
1624                         rs.sr_attrs = anlist;
1625
1626                         /* NOTE: backend_operational() is also called
1627                          * when returning results, so it's supposed
1628                          * to do no harm to entries */
1629                         rs.sr_entry = e;
1630                         rc = backend_operational( op, &rs );
1631                         rs.sr_entry = NULL;
1632
1633                         if ( rc == LDAP_SUCCESS ) {
1634                                 if ( rs.sr_operational_attrs ) {
1635                                         freeattr = 1;
1636                                         a = rs.sr_operational_attrs;
1637
1638                                 } else {
1639                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1640                                 }
1641                         }
1642                 }
1643
1644                 if ( a ) {
1645                         BerVarray v;
1646
1647                         if ( op->o_conn && access > ACL_NONE &&
1648                                 access_allowed( op, e, entry_at, NULL,
1649                                                 access, &acl_state ) == 0 )
1650                         {
1651                                 rc = LDAP_INSUFFICIENT_ACCESS;
1652                                 goto freeit;
1653                         }
1654
1655                         i = a->a_numvals;
1656                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1657                                 op->o_tmpmemctx );
1658                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1659                         {
1660                                 if ( op->o_conn && access > ACL_NONE &&
1661                                         access_allowed( op, e, entry_at,
1662                                                         &a->a_nvals[i],
1663                                                         access,
1664                                                         &acl_state ) == 0 )
1665                                 {
1666                                         continue;
1667                                 }
1668                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1669                                                 op->o_tmpmemctx );
1670                                 if ( !BER_BVISNULL( &v[j] ) ) {
1671                                         j++;
1672                                 }
1673                         }
1674                         if ( j == 0 ) {
1675                                 op->o_tmpfree( v, op->o_tmpmemctx );
1676                                 *vals = NULL;
1677                                 rc = LDAP_INSUFFICIENT_ACCESS;
1678
1679                         } else {
1680                                 BER_BVZERO( &v[j] );
1681                                 *vals = v;
1682                                 rc = LDAP_SUCCESS;
1683                         }
1684                 }
1685 freeit:         if ( e != target ) {
1686                         op->o_private = e_priv;
1687                         be_entry_release_r( op, e );
1688                         op->o_private = o_priv;
1689                 }
1690                 if ( freeattr ) {
1691                         attr_free( a );
1692                 }
1693         }
1694
1695         op->o_bd = be;
1696         return rc;
1697 }
1698
1699 int
1700 backend_attribute(
1701         Operation *op,
1702         Entry   *target,
1703         struct berval   *edn,
1704         AttributeDescription *entry_at,
1705         BerVarray *vals,
1706         slap_access_t access )
1707 {
1708         int                     rc;
1709         BackendDB               *be_orig;
1710
1711         be_orig = op->o_bd;
1712         op->o_bd = frontendDB;
1713         rc = frontendDB->be_attribute( op, target, edn,
1714                 entry_at, vals, access );
1715         op->o_bd = be_orig;
1716
1717         return rc;
1718 }
1719
1720 int
1721 backend_access(
1722         Operation               *op,
1723         Entry                   *target,
1724         struct berval           *edn,
1725         AttributeDescription    *entry_at,
1726         struct berval           *nval,
1727         slap_access_t           access,
1728         slap_mask_t             *mask )
1729 {
1730         Entry           *e = NULL;
1731         void            *o_priv = op->o_private, *e_priv = NULL;
1732         int             rc = LDAP_INSUFFICIENT_ACCESS;
1733         Backend         *be = op->o_bd;
1734
1735         /* pedantic */
1736         assert( op != NULL );
1737         assert( op->o_conn != NULL );
1738         assert( edn != NULL );
1739         assert( access > ACL_NONE );
1740
1741         op->o_bd = select_backend( edn, 0 );
1742
1743         if ( target && dn_match( &target->e_nname, edn ) ) {
1744                 e = target;
1745
1746         } else {
1747                 op->o_private = NULL;
1748                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1749                 e_priv = op->o_private;
1750                 op->o_private = o_priv;
1751         }
1752
1753         if ( e ) {
1754                 Attribute       *a = NULL;
1755                 int             freeattr = 0;
1756
1757                 if ( entry_at == NULL ) {
1758                         entry_at = slap_schema.si_ad_entry;
1759                 }
1760
1761                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1762                 {
1763                         if ( access_allowed_mask( op, e, entry_at,
1764                                         NULL, access, NULL, mask ) == 0 )
1765                         {
1766                                 rc = LDAP_INSUFFICIENT_ACCESS;
1767
1768                         } else {
1769                                 rc = LDAP_SUCCESS;
1770                         }
1771
1772                 } else {
1773                         a = attr_find( e->e_attrs, entry_at );
1774                         if ( a == NULL ) {
1775                                 SlapReply       rs = { 0 };
1776                                 AttributeName   anlist[ 2 ];
1777
1778                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1779                                 anlist[ 0 ].an_desc = entry_at;
1780                                 BER_BVZERO( &anlist[ 1 ].an_name );
1781                                 rs.sr_attrs = anlist;
1782
1783                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1784
1785                                 /* NOTE: backend_operational() is also called
1786                                  * when returning results, so it's supposed
1787                                  * to do no harm to entries */
1788                                 rs.sr_entry = e;
1789                                 rc = backend_operational( op, &rs );
1790                                 rs.sr_entry = NULL;
1791
1792                                 if ( rc == LDAP_SUCCESS ) {
1793                                         if ( rs.sr_operational_attrs ) {
1794                                                 freeattr = 1;
1795                                                 a = rs.sr_operational_attrs;
1796
1797                                         } else {
1798                                                 rc = LDAP_NO_SUCH_OBJECT;
1799                                         }
1800                                 }
1801                         }
1802
1803                         if ( a ) {
1804                                 if ( access_allowed_mask( op, e, entry_at,
1805                                                 nval, access, NULL, mask ) == 0 )
1806                                 {
1807                                         rc = LDAP_INSUFFICIENT_ACCESS;
1808                                         goto freeit;
1809                                 }
1810                                 rc = LDAP_SUCCESS;
1811                         }
1812                 }
1813 freeit:         if ( e != target ) {
1814                         op->o_private = e_priv;
1815                         be_entry_release_r( op, e );
1816                         op->o_private = o_priv;
1817                 }
1818                 if ( freeattr ) {
1819                         attr_free( a );
1820                 }
1821         }
1822
1823         op->o_bd = be;
1824         return rc;
1825 }
1826
1827 int
1828 fe_aux_operational(
1829         Operation *op,
1830         SlapReply *rs )
1831 {
1832         Attribute               **ap;
1833         int                     rc = 0;
1834
1835         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1836                 /* just count them */ ;
1837
1838         /*
1839          * If operational attributes (allegedly) are required,
1840          * and the backend supports specific operational attributes,
1841          * add them to the attribute list
1842          */
1843         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1844                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1845                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1846         {
1847                 *ap = slap_operational_entryDN( rs->sr_entry );
1848                 ap = &(*ap)->a_next;
1849         }
1850
1851         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1852                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1853                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1854         {
1855                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1856                 ap = &(*ap)->a_next;
1857         }
1858
1859         if ( op->o_bd != NULL ) {
1860                 BackendDB               *be_orig = op->o_bd;
1861
1862                 /* Let the overlays have a chance at this */
1863                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1864                 if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1865                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1866                         op->o_bd->be_operational != NULL )
1867                 {
1868                         rc = op->o_bd->be_operational( op, rs );
1869                 }
1870                 op->o_bd = be_orig;
1871         }
1872
1873         return rc;
1874 }
1875
1876 int backend_operational( Operation *op, SlapReply *rs )
1877 {
1878         int rc;
1879         BackendDB *be_orig;
1880
1881         /* Moved this into the frontend so global overlays are called */
1882
1883         be_orig = op->o_bd;
1884         op->o_bd = frontendDB;
1885         rc = frontendDB->be_operational( op, rs );
1886         op->o_bd = be_orig;
1887
1888         return rc;
1889 }
1890