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 1998-2007 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
 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
 799         assert( op->o_tag == LDAP_REQ_BIND );
 800         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 801
 802         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 803                 return SLAP_CB_CONTINUE;
 804         }
 805
 806         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 807                 /* give the database a chance */
 808                 return SLAP_CB_CONTINUE;
 809         }
 810
 811         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 812                 /* rootdn bind explicitly disallowed */
 813                 rc = LDAP_INVALID_CREDENTIALS;
 814                 if ( rs ) {
 815                         goto send_result;
 816                 }
 817
 818                 return rc;
 819         }
 820
 821 #ifdef SLAPD_SPASSWD
 822         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 823                 op->o_conn->c_sasl_authctx, NULL );
 824 #endif
 825
 826         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 827
 828 #ifdef SLAPD_SPASSWD
 829         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 830 #endif
 831
 832         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 833         if ( rs ) {
 834 send_result:;
 835                 rs->sr_err = rc;
 836
 837                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 838                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 839                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 840
 841                 if ( rc == LDAP_SUCCESS ) {
 842                         /* Set to the pretty rootdn */
 843                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 844
 845                 } else {
 846                         send_ldap_result( op, rs );
 847                 }
 848         }
 849
 850         return rc;
 851 }
 852
 853 int
 854 be_entry_release_rw(
 855         Operation *op,
 856         Entry *e,
 857         int rw )
 858 {
 859         if ( op->o_bd->be_release ) {
 860                 /* free and release entry from backend */
 861                 return op->o_bd->be_release( op, e, rw );
 862         } else {
 863                 /* free entry */
 864                 entry_free( e );
 865                 return 0;
 866         }
 867 }
 868
 869 int
 870 backend_unbind( Operation *op, SlapReply *rs )
 871 {
 872         BackendDB *be;
 873
 874         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 875                 if ( be->be_unbind ) {
 876                         op->o_bd = be;
 877                         be->be_unbind( op, rs );
 878                 }
 879         }
 880
 881         return 0;
 882 }
 883
 884 int
 885 backend_connection_init(
 886         Connection   *conn )
 887 {
 888         BackendDB *be;
 889
 890         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 891                 if ( be->be_connection_init ) {
 892                         be->be_connection_init( be, conn );
 893                 }
 894         }
 895
 896         return 0;
 897 }
 898
 899 int
 900 backend_connection_destroy(
 901         Connection   *conn )
 902 {
 903         BackendDB *be;
 904
 905         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 906                 if ( be->be_connection_destroy ) {
 907                         be->be_connection_destroy( be, conn);
 908                 }
 909         }
 910
 911         return 0;
 912 }
 913
 914 int
 915 backend_check_controls(
 916         Operation *op,
 917         SlapReply *rs )
 918 {
 919         LDAPControl **ctrls = op->o_ctrls;
 920         rs->sr_err = LDAP_SUCCESS;
 921
 922         if( ctrls ) {
 923                 for( ; *ctrls != NULL ; ctrls++ ) {
 924                         int cid;
 925
 926                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 927                         case LDAP_CONTROL_NOT_FOUND:
 928                                 /* unrecognized control */
 929                                 if ( (*ctrls)->ldctl_iscritical ) {
 930                                         /* should not be reachable */
 931                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 932                                                 "unrecognized critical control: %s\n",
 933                                                 (*ctrls)->ldctl_oid, 0, 0 );
 934                                         assert( 0 );
 935                                 } else {
 936                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 937                                                 "unrecognized non-critical control: %s\n",
 938                                                 (*ctrls)->ldctl_oid, 0, 0 );
 939                                 }
 940                                 break;
 941
 942                         case LDAP_COMPARE_FALSE:
 943                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 944                                         /* RFC 4511 allows unavailableCriticalExtension to be
 945                                          * returned when the server is unwilling to perform
 946                                          * an operation extended by a recognized critical
 947                                          * control.
 948                                          */
 949                                         rs->sr_text = "critical control unavailable in context";
 950                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 951                                         goto done;
 952                                 }
 953                                 break;
 954
 955                         case LDAP_COMPARE_TRUE:
 956                                 break;
 957
 958                         default:
 959                                 /* unreachable */
 960                                 Debug( LDAP_DEBUG_ANY,
 961                                         "backend_check_controls: unable to check control: %s\n",
 962                                         (*ctrls)->ldctl_oid, 0, 0 );
 963                                 assert( 0 );
 964
 965                                 rs->sr_text = "unable to check control";
 966                                 rs->sr_err = LDAP_OTHER;
 967                                 goto done;
 968                         }
 969                 }
 970         }
 971
 972 #if 0 /* temporarily removed */
 973         /* check should be generalized */
 974         if( get_relax(op) && !be_isroot(op)) {
 975                 rs->sr_text = "requires manager authorization";
 976                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 977         }
 978 #endif
 979
 980 done:;
 981         return rs->sr_err;
 982 }
 983
 984 int
 985 backend_check_restrictions(
 986         Operation *op,
 987         SlapReply *rs,
 988         struct berval *opdata )
 989 {
 990         slap_mask_t restrictops;
 991         slap_mask_t requires;
 992         slap_mask_t opflag;
 993         slap_mask_t exopflag = 0;
 994         slap_ssf_set_t *ssf;
 995         int updateop = 0;
 996         int starttls = 0;
 997         int session = 0;
 998
 999         if ( op->o_bd ) {
1000                 int     rc = SLAP_CB_CONTINUE;
1001
1002                 if ( op->o_bd->be_chk_controls ) {
1003                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1004                 }
1005
1006                 if ( rc == SLAP_CB_CONTINUE ) {
1007                         rc = backend_check_controls( op, rs );
1008                 }
1009
1010                 if ( rc != LDAP_SUCCESS ) {
1011                         return rs->sr_err;
1012                 }
1013
1014                 restrictops = op->o_bd->be_restrictops;
1015                 requires = op->o_bd->be_requires;
1016                 ssf = &op->o_bd->be_ssf_set;
1017
1018         } else {
1019                 restrictops = frontendDB->be_restrictops;
1020                 requires = frontendDB->be_requires;
1021                 ssf = &frontendDB->be_ssf_set;
1022         }
1023
1024         switch( op->o_tag ) {
1025         case LDAP_REQ_ADD:
1026                 opflag = SLAP_RESTRICT_OP_ADD;
1027                 updateop++;
1028                 break;
1029         case LDAP_REQ_BIND:
1030                 opflag = SLAP_RESTRICT_OP_BIND;
1031                 session++;
1032                 break;
1033         case LDAP_REQ_COMPARE:
1034                 opflag = SLAP_RESTRICT_OP_COMPARE;
1035                 break;
1036         case LDAP_REQ_DELETE:
1037                 updateop++;
1038                 opflag = SLAP_RESTRICT_OP_DELETE;
1039                 break;
1040         case LDAP_REQ_EXTENDED:
1041                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1042
1043                 if( !opdata ) {
1044                         /* treat unspecified as a modify */
1045                         opflag = SLAP_RESTRICT_OP_MODIFY;
1046                         updateop++;
1047                         break;
1048                 }
1049
1050                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1051                         session++;
1052                         starttls++;
1053                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1054                         break;
1055                 }
1056
1057                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1058                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1059                         break;
1060                 }
1061
1062                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1063                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1064                         break;
1065                 }
1066
1067                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1068                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1069                         updateop++;
1070                         break;
1071                 }
1072
1073                 /* treat everything else as a modify */
1074                 opflag = SLAP_RESTRICT_OP_MODIFY;
1075                 updateop++;
1076                 break;
1077
1078         case LDAP_REQ_MODIFY:
1079                 updateop++;
1080                 opflag = SLAP_RESTRICT_OP_MODIFY;
1081                 break;
1082         case LDAP_REQ_RENAME:
1083                 updateop++;
1084                 opflag = SLAP_RESTRICT_OP_RENAME;
1085                 break;
1086         case LDAP_REQ_SEARCH:
1087                 opflag = SLAP_RESTRICT_OP_SEARCH;
1088                 break;
1089         case LDAP_REQ_UNBIND:
1090                 session++;
1091                 opflag = 0;
1092                 break;
1093         default:
1094                 rs->sr_text = "restrict operations internal error";
1095                 rs->sr_err = LDAP_OTHER;
1096                 return rs->sr_err;
1097         }
1098
1099         if ( !starttls ) {
1100                 /* these checks don't apply to StartTLS */
1101
1102                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1103                 if( op->o_transport_ssf < ssf->sss_transport ) {
1104                         rs->sr_text = op->o_transport_ssf
1105                                 ? "stronger transport confidentiality required"
1106                                 : "transport confidentiality required";
1107                         return rs->sr_err;
1108                 }
1109
1110                 if( op->o_tls_ssf < ssf->sss_tls ) {
1111                         rs->sr_text = op->o_tls_ssf
1112                                 ? "stronger TLS confidentiality required"
1113                                 : "TLS confidentiality required";
1114                         return rs->sr_err;
1115                 }
1116
1117
1118                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1119                         /* simple bind specific check */
1120                         if( op->o_ssf < ssf->sss_simple_bind ) {
1121                                 rs->sr_text = op->o_ssf
1122                                         ? "stronger confidentiality required"
1123                                         : "confidentiality required";
1124                                 return rs->sr_err;
1125                         }
1126                 }
1127
1128                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1129                         /* these checks don't apply to SASL bind */
1130
1131                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1132                                 rs->sr_text = op->o_sasl_ssf
1133                                         ? "stronger SASL confidentiality required"
1134                                         : "SASL confidentiality required";
1135                                 return rs->sr_err;
1136                         }
1137
1138                         if( op->o_ssf < ssf->sss_ssf ) {
1139                                 rs->sr_text = op->o_ssf
1140                                         ? "stronger confidentiality required"
1141                                         : "confidentiality required";
1142                                 return rs->sr_err;
1143                         }
1144                 }
1145
1146                 if( updateop ) {
1147                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1148                                 rs->sr_text = op->o_transport_ssf
1149                                         ? "stronger transport confidentiality required for update"
1150                                         : "transport confidentiality required for update";
1151                                 return rs->sr_err;
1152                         }
1153
1154                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1155                                 rs->sr_text = op->o_tls_ssf
1156                                         ? "stronger TLS confidentiality required for update"
1157                                         : "TLS confidentiality required for update";
1158                                 return rs->sr_err;
1159                         }
1160
1161                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1162                                 rs->sr_text = op->o_sasl_ssf
1163                                         ? "stronger SASL confidentiality required for update"
1164                                         : "SASL confidentiality required for update";
1165                                 return rs->sr_err;
1166                         }
1167
1168                         if( op->o_ssf < ssf->sss_update_ssf ) {
1169                                 rs->sr_text = op->o_ssf
1170                                         ? "stronger confidentiality required for update"
1171                                         : "confidentiality required for update";
1172                                 return rs->sr_err;
1173                         }
1174
1175                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1176                                 BER_BVISEMPTY( &op->o_ndn ) )
1177                         {
1178                                 rs->sr_text = "modifications require authentication";
1179                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1180                                 return rs->sr_err;
1181                         }
1182
1183 #ifdef SLAP_X_LISTENER_MOD
1184                         if ( op->o_conn->c_listener &&
1185                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1186                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1187                         {
1188                                 /* no "w" mode means readonly */
1189                                 rs->sr_text = "modifications not allowed on this listener";
1190                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1191                                 return rs->sr_err;
1192                         }
1193 #endif /* SLAP_X_LISTENER_MOD */
1194                 }
1195         }
1196
1197         if ( !session ) {
1198                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1199
1200                 if( requires & SLAP_REQUIRE_STRONG ) {
1201                         /* should check mechanism */
1202                         if( ( op->o_transport_ssf < ssf->sss_transport
1203                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1204                                 || BER_BVISEMPTY( &op->o_dn ) )
1205                         {
1206                                 rs->sr_text = "strong(er) authentication required";
1207                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1208                                 return rs->sr_err;
1209                         }
1210                 }
1211
1212                 if( requires & SLAP_REQUIRE_SASL ) {
1213                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1214                                 rs->sr_text = "SASL authentication required";
1215                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1216                                 return rs->sr_err;
1217                         }
1218                 }
1219
1220                 if( requires & SLAP_REQUIRE_AUTHC ) {
1221                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1222                                 rs->sr_text = "authentication required";
1223                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1224                                 return rs->sr_err;
1225                         }
1226                 }
1227
1228                 if( requires & SLAP_REQUIRE_BIND ) {
1229                         int version;
1230                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1231                         version = op->o_conn->c_protocol;
1232                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1233
1234                         if( !version ) {
1235                                 /* no bind has occurred */
1236                                 rs->sr_text = "BIND required";
1237                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1238                                 return rs->sr_err;
1239                         }
1240                 }
1241
1242                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1243                         if( op->o_protocol < LDAP_VERSION3 ) {
1244                                 /* no bind has occurred */
1245                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1246                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1247                                 return rs->sr_err;
1248                         }
1249                 }
1250
1251 #ifdef SLAP_X_LISTENER_MOD
1252                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1253                         if ( op->o_conn->c_listener &&
1254                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1255                 {
1256                                 /* no "x" mode means bind required */
1257                                 rs->sr_text = "bind required on this listener";
1258                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1259                                 return rs->sr_err;
1260                         }
1261                 }
1262
1263                 if ( !starttls && !updateop ) {
1264                         if ( op->o_conn->c_listener &&
1265                                 !( op->o_conn->c_listener->sl_perms &
1266                                         ( !BER_BVISEMPTY( &op->o_dn )
1267                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1268                         {
1269                                 /* no "r" mode means no read */
1270                                 rs->sr_text = "read not allowed on this listener";
1271                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1272                                 return rs->sr_err;
1273                         }
1274                 }
1275 #endif /* SLAP_X_LISTENER_MOD */
1276
1277         }
1278
1279         if( ( restrictops & opflag )
1280                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1281                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1282                         rs->sr_text = "read operations restricted";
1283                 } else if ( restrictops & exopflag ) {
1284                         rs->sr_text = "extended operation restricted";
1285                 } else {
1286                         rs->sr_text = "operation restricted";
1287                 }
1288                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1289                 return rs->sr_err;
1290         }
1291
1292         rs->sr_err = LDAP_SUCCESS;
1293         return rs->sr_err;
1294 }
1295
1296 int backend_check_referrals( Operation *op, SlapReply *rs )
1297 {
1298         rs->sr_err = LDAP_SUCCESS;
1299
1300         if( op->o_bd->be_chk_referrals ) {
1301                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1302
1303                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1304                         send_ldap_result( op, rs );
1305                 }
1306         }
1307
1308         return rs->sr_err;
1309 }
1310
1311 int
1312 be_entry_get_rw(
1313         Operation *op,
1314         struct berval *ndn,
1315         ObjectClass *oc,
1316         AttributeDescription *at,
1317         int rw,
1318         Entry **e )
1319 {
1320         *e = NULL;
1321
1322         if ( op->o_bd == NULL ) {
1323                 return LDAP_NO_SUCH_OBJECT;
1324         }
1325
1326         if ( op->o_bd->be_fetch ) {
1327                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1328         }
1329
1330         return LDAP_UNWILLING_TO_PERFORM;
1331 }
1332
1333 int
1334 fe_acl_group(
1335         Operation *op,
1336         Entry   *target,
1337         struct berval *gr_ndn,
1338         struct berval *op_ndn,
1339         ObjectClass *group_oc,
1340         AttributeDescription *group_at )
1341 {
1342         Entry *e;
1343         void *o_priv = op->o_private, *e_priv = NULL;
1344         Attribute *a;
1345         int rc;
1346         GroupAssertion *g;
1347         Backend *be = op->o_bd;
1348
1349         op->o_bd = select_backend( gr_ndn, 0 );
1350
1351         for ( g = op->o_groups; g; g = g->ga_next ) {
1352                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1353                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1354                 {
1355                         continue;
1356                 }
1357                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1358                         break;
1359                 }
1360         }
1361
1362         if ( g ) {
1363                 rc = g->ga_res;
1364                 goto done;
1365         }
1366
1367         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1368                 e = target;
1369                 rc = 0;
1370
1371         } else {
1372                 op->o_private = NULL;
1373                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1374                 e_priv = op->o_private;
1375                 op->o_private = o_priv;
1376         }
1377
1378         if ( e ) {
1379                 a = attr_find( e->e_attrs, group_at );
1380                 if ( a ) {
1381                         /* If the attribute is a subtype of labeledURI,
1382                          * treat this as a dynamic group ala groupOfURLs
1383                          */
1384                         if ( is_at_subtype( group_at->ad_type,
1385                                 slap_schema.si_ad_labeledURI->ad_type ) )
1386                         {
1387                                 int i;
1388                                 LDAPURLDesc *ludp;
1389                                 struct berval bv, nbase;
1390                                 Filter *filter;
1391                                 Entry *user = NULL;
1392                                 void *user_priv = NULL;
1393                                 Backend *b2 = op->o_bd;
1394
1395                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1396                                         user = target;
1397                                 }
1398
1399                                 rc = LDAP_COMPARE_FALSE;
1400                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1401                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1402                                                 LDAP_URL_SUCCESS )
1403                                         {
1404                                                 continue;
1405                                         }
1406
1407                                         BER_BVZERO( &nbase );
1408
1409                                         /* host, attrs and extensions parts must be empty */
1410                                         if ( ( ludp->lud_host && *ludp->lud_host )
1411                                                 || ludp->lud_attrs
1412                                                 || ludp->lud_exts )
1413                                         {
1414                                                 goto loopit;
1415                                         }
1416
1417                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1418                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1419                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1420                                         {
1421                                                 goto loopit;
1422                                         }
1423
1424                                         switch ( ludp->lud_scope ) {
1425                                         case LDAP_SCOPE_BASE:
1426                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1427                                                         goto loopit;
1428                                                 }
1429                                                 break;
1430                                         case LDAP_SCOPE_ONELEVEL:
1431                                                 dnParent( op_ndn, &bv );
1432                                                 if ( !dn_match( &nbase, &bv ) ) {
1433                                                         goto loopit;
1434                                                 }
1435                                                 break;
1436                                         case LDAP_SCOPE_SUBTREE:
1437                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1438                                                         goto loopit;
1439                                                 }
1440                                                 break;
1441                                         case LDAP_SCOPE_SUBORDINATE:
1442                                                 if ( dn_match( &nbase, op_ndn ) ||
1443                                                         !dnIsSuffix( op_ndn, &nbase ) )
1444                                                 {
1445                                                         goto loopit;
1446                                                 }
1447                                         }
1448
1449                                         /* NOTE: this could be NULL
1450                                          * if no filter is provided,
1451                                          * or if filter parsing fails.
1452                                          * In the latter case,
1453                                          * we should give up. */
1454                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1455                                                 filter = str2filter_x( op, ludp->lud_filter );
1456                                                 if ( filter == NULL ) {
1457                                                         /* give up... */
1458                                                         rc = LDAP_OTHER;
1459                                                         goto loopit;
1460                                                 }
1461
1462                                                 /* only get user if required
1463                                                  * and not available yet */
1464                                                 if ( user == NULL ) {
1465                                                         int rc2;
1466
1467                                                         op->o_bd = select_backend( op_ndn, 0 );
1468                                                         op->o_private = NULL;
1469                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1470                                                         user_priv = op->o_private;
1471                                                         op->o_private = o_priv;
1472                                                         if ( rc2 != 0 ) {
1473                                                                 /* give up... */
1474                                                                 rc = LDAP_OTHER;
1475                                                                 goto loopit;
1476                                                         }
1477                                                 }
1478
1479                                                 if ( test_filter( NULL, user, filter ) ==
1480                                                         LDAP_COMPARE_TRUE )
1481                                                 {
1482                                                         rc = 0;
1483                                                 }
1484                                                 filter_free_x( op, filter );
1485                                         }
1486 loopit:
1487                                         ldap_free_urldesc( ludp );
1488                                         if ( !BER_BVISNULL( &nbase ) ) {
1489                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1490                                         }
1491                                         if ( rc != LDAP_COMPARE_FALSE ) {
1492                                                 break;
1493                                         }
1494                                 }
1495
1496                                 if ( user != NULL && user != target ) {
1497                                         op->o_private = user_priv;
1498                                         be_entry_release_r( op, user );
1499                                         op->o_private = o_priv;
1500                                 }
1501                                 op->o_bd = b2;
1502
1503                         } else {
1504                                 rc = value_find_ex( group_at,
1505                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1506                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1507                                         a->a_nvals, op_ndn, op->o_tmpmemctx );
1508                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1509                                         rc = LDAP_COMPARE_FALSE;
1510                                 }
1511                         }
1512
1513                 } else {
1514                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1515                 }
1516
1517                 if ( e != target ) {
1518                         op->o_private = e_priv;
1519                         be_entry_release_r( op, e );
1520                         op->o_private = o_priv;
1521                 }
1522
1523         } else {
1524                 rc = LDAP_NO_SUCH_OBJECT;
1525         }
1526
1527         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1528                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1529                         op->o_tmpmemctx );
1530                 g->ga_be = op->o_bd;
1531                 g->ga_oc = group_oc;
1532                 g->ga_at = group_at;
1533                 g->ga_res = rc;
1534                 g->ga_len = gr_ndn->bv_len;
1535                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1536                 g->ga_next = op->o_groups;
1537                 op->o_groups = g;
1538         }
1539
1540 done:
1541         op->o_bd = be;
1542         return rc;
1543 }
1544
1545 int
1546 backend_group(
1547         Operation *op,
1548         Entry   *target,
1549         struct berval *gr_ndn,
1550         struct berval *op_ndn,
1551         ObjectClass *group_oc,
1552         AttributeDescription *group_at )
1553 {
1554         int                     rc;
1555         BackendDB               *be_orig;
1556
1557         if ( op->o_abandon ) {
1558                 return SLAPD_ABANDON;
1559         }
1560
1561         be_orig = op->o_bd;
1562         op->o_bd = frontendDB;
1563         rc = frontendDB->be_group( op, target, gr_ndn,
1564                 op_ndn, group_oc, group_at );
1565         op->o_bd = be_orig;
1566
1567         return rc;
1568 }
1569
1570 int
1571 fe_acl_attribute(
1572         Operation *op,
1573         Entry   *target,
1574         struct berval   *edn,
1575         AttributeDescription *entry_at,
1576         BerVarray *vals,
1577         slap_access_t access )
1578 {
1579         Entry                   *e = NULL;
1580         void                    *o_priv = op->o_private, *e_priv = NULL;
1581         Attribute               *a = NULL;
1582         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1583         AccessControlState      acl_state = ACL_STATE_INIT;
1584         Backend                 *be = op->o_bd;
1585
1586         op->o_bd = select_backend( edn, 0 );
1587
1588         if ( target && dn_match( &target->e_nname, edn ) ) {
1589                 e = target;
1590
1591         } else {
1592                 op->o_private = NULL;
1593                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1594                 e_priv = op->o_private;
1595                 op->o_private = o_priv;
1596         }
1597
1598         if ( e ) {
1599                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1600                         assert( vals == NULL );
1601
1602                         rc = LDAP_SUCCESS;
1603                         if ( op->o_conn && access > ACL_NONE &&
1604                                 access_allowed( op, e, entry_at, NULL,
1605                                                 access, &acl_state ) == 0 )
1606                         {
1607                                 rc = LDAP_INSUFFICIENT_ACCESS;
1608                         }
1609                         goto freeit;
1610                 }
1611
1612                 a = attr_find( e->e_attrs, entry_at );
1613                 if ( a == NULL ) {
1614                         SlapReply       rs = { 0 };
1615                         AttributeName   anlist[ 2 ];
1616
1617                         anlist[ 0 ].an_name = entry_at->ad_cname;
1618                         anlist[ 0 ].an_desc = entry_at;
1619                         BER_BVZERO( &anlist[ 1 ].an_name );
1620                         rs.sr_attrs = anlist;
1621
1622                         /* NOTE: backend_operational() is also called
1623                          * when returning results, so it's supposed
1624                          * to do no harm to entries */
1625                         rs.sr_entry = e;
1626                         rc = backend_operational( op, &rs );
1627                         rs.sr_entry = NULL;
1628
1629                         if ( rc == LDAP_SUCCESS ) {
1630                                 if ( rs.sr_operational_attrs ) {
1631                                         freeattr = 1;
1632                                         a = rs.sr_operational_attrs;
1633
1634                                 } else {
1635                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1636                                 }
1637                         }
1638                 }
1639
1640                 if ( a ) {
1641                         BerVarray v;
1642
1643                         if ( op->o_conn && access > ACL_NONE &&
1644                                 access_allowed( op, e, entry_at, NULL,
1645                                                 access, &acl_state ) == 0 )
1646                         {
1647                                 rc = LDAP_INSUFFICIENT_ACCESS;
1648                                 goto freeit;
1649                         }
1650
1651                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1652                                 ;
1653
1654                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1655                                 op->o_tmpmemctx );
1656                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1657                         {
1658                                 if ( op->o_conn && access > ACL_NONE &&
1659                                         access_allowed( op, e, entry_at,
1660                                                         &a->a_nvals[i],
1661                                                         access,
1662                                                         &acl_state ) == 0 )
1663                                 {
1664                                         continue;
1665                                 }
1666                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1667                                                 op->o_tmpmemctx );
1668                                 if ( !BER_BVISNULL( &v[j] ) ) {
1669                                         j++;
1670                                 }
1671                         }
1672                         if ( j == 0 ) {
1673                                 op->o_tmpfree( v, op->o_tmpmemctx );
1674                                 *vals = NULL;
1675                                 rc = LDAP_INSUFFICIENT_ACCESS;
1676
1677                         } else {
1678                                 BER_BVZERO( &v[j] );
1679                                 *vals = v;
1680                                 rc = LDAP_SUCCESS;
1681                         }
1682                 }
1683 freeit:         if ( e != target ) {
1684                         op->o_private = e_priv;
1685                         be_entry_release_r( op, e );
1686                         op->o_private = o_priv;
1687                 }
1688                 if ( freeattr ) {
1689                         attr_free( a );
1690                 }
1691         }
1692
1693         op->o_bd = be;
1694         return rc;
1695 }
1696
1697 int
1698 backend_attribute(
1699         Operation *op,
1700         Entry   *target,
1701         struct berval   *edn,
1702         AttributeDescription *entry_at,
1703         BerVarray *vals,
1704         slap_access_t access )
1705 {
1706         int                     rc;
1707         BackendDB               *be_orig;
1708
1709         be_orig = op->o_bd;
1710         op->o_bd = frontendDB;
1711         rc = frontendDB->be_attribute( op, target, edn,
1712                 entry_at, vals, access );
1713         op->o_bd = be_orig;
1714
1715         return rc;
1716 }
1717
1718 int
1719 backend_access(
1720         Operation               *op,
1721         Entry                   *target,
1722         struct berval           *edn,
1723         AttributeDescription    *entry_at,
1724         struct berval           *nval,
1725         slap_access_t           access,
1726         slap_mask_t             *mask )
1727 {
1728         Entry           *e = NULL;
1729         void            *o_priv = op->o_private, *e_priv = NULL;
1730         int             rc = LDAP_INSUFFICIENT_ACCESS;
1731         Backend         *be = op->o_bd;
1732
1733         /* pedantic */
1734         assert( op != NULL );
1735         assert( op->o_conn != NULL );
1736         assert( edn != NULL );
1737         assert( access > ACL_NONE );
1738
1739         op->o_bd = select_backend( edn, 0 );
1740
1741         if ( target && dn_match( &target->e_nname, edn ) ) {
1742                 e = target;
1743
1744         } else {
1745                 op->o_private = NULL;
1746                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1747                 e_priv = op->o_private;
1748                 op->o_private = o_priv;
1749         }
1750
1751         if ( e ) {
1752                 Attribute       *a = NULL;
1753                 int             freeattr = 0;
1754
1755                 if ( entry_at == NULL ) {
1756                         entry_at = slap_schema.si_ad_entry;
1757                 }
1758
1759                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1760                 {
1761                         if ( access_allowed_mask( op, e, entry_at,
1762                                         NULL, access, NULL, mask ) == 0 )
1763                         {
1764                                 rc = LDAP_INSUFFICIENT_ACCESS;
1765
1766                         } else {
1767                                 rc = LDAP_SUCCESS;
1768                         }
1769
1770                 } else {
1771                         a = attr_find( e->e_attrs, entry_at );
1772                         if ( a == NULL ) {
1773                                 SlapReply       rs = { 0 };
1774                                 AttributeName   anlist[ 2 ];
1775
1776                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1777                                 anlist[ 0 ].an_desc = entry_at;
1778                                 BER_BVZERO( &anlist[ 1 ].an_name );
1779                                 rs.sr_attrs = anlist;
1780
1781                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1782
1783                                 /* NOTE: backend_operational() is also called
1784                                  * when returning results, so it's supposed
1785                                  * to do no harm to entries */
1786                                 rs.sr_entry = e;
1787                                 rc = backend_operational( op, &rs );
1788                                 rs.sr_entry = NULL;
1789
1790                                 if ( rc == LDAP_SUCCESS ) {
1791                                         if ( rs.sr_operational_attrs ) {
1792                                                 freeattr = 1;
1793                                                 a = rs.sr_operational_attrs;
1794
1795                                         } else {
1796                                                 rc = LDAP_NO_SUCH_OBJECT;
1797                                         }
1798                                 }
1799                         }
1800
1801                         if ( a ) {
1802                                 if ( access_allowed_mask( op, e, entry_at,
1803                                                 nval, access, NULL, mask ) == 0 )
1804                                 {
1805                                         rc = LDAP_INSUFFICIENT_ACCESS;
1806                                         goto freeit;
1807                                 }
1808                                 rc = LDAP_SUCCESS;
1809                         }
1810                 }
1811 freeit:         if ( e != target ) {
1812                         op->o_private = e_priv;
1813                         be_entry_release_r( op, e );
1814                         op->o_private = o_priv;
1815                 }
1816                 if ( freeattr ) {
1817                         attr_free( a );
1818                 }
1819         }
1820
1821         op->o_bd = be;
1822         return rc;
1823 }
1824
1825 int
1826 fe_aux_operational(
1827         Operation *op,
1828         SlapReply *rs )
1829 {
1830         Attribute               **ap;
1831         int                     rc = 0;
1832
1833         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1834                 /* just count them */ ;
1835
1836         /*
1837          * If operational attributes (allegedly) are required,
1838          * and the backend supports specific operational attributes,
1839          * add them to the attribute list
1840          */
1841         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1842                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1843                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1844         {
1845                 *ap = slap_operational_entryDN( rs->sr_entry );
1846                 ap = &(*ap)->a_next;
1847         }
1848
1849         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1850                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1851                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1852         {
1853                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1854                 ap = &(*ap)->a_next;
1855         }
1856
1857         if ( op->o_bd != NULL ) {
1858                 BackendDB               *be_orig = op->o_bd;
1859
1860                 /* Let the overlays have a chance at this */
1861                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1862                 if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1863                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1864                         op->o_bd->be_operational != NULL )
1865                 {
1866                         rc = op->o_bd->be_operational( op, rs );
1867                 }
1868                 op->o_bd = be_orig;
1869         }
1870
1871         return rc;
1872 }
1873
1874 int backend_operational( Operation *op, SlapReply *rs )
1875 {
1876         int rc;
1877         BackendDB *be_orig;
1878
1879         /* Moved this into the frontend so global overlays are called */
1880
1881         be_orig = op->o_bd;
1882         op->o_bd = frontendDB;
1883         rc = frontendDB->be_operational( op, rs );
1884         op->o_bd = be_orig;
1885
1886         return rc;
1887 }
1888