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 1998-2009 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
 265                 return backend_startup_one( be, &cr );
 266         }
 267
 268         /* open frontend, if required */
 269         if ( frontendDB->bd_info->bi_db_open ) {
 270                 rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr );
 271                 if ( rc != 0 ) {
 272                         Debug( LDAP_DEBUG_ANY,
 273                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 274                                 rc, 0, 0 );
 275                         return rc;
 276                 }
 277         }
 278
 279         /* open each backend type */
 280         i = -1;
 281         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 282                 i++;
 283                 if( bi->bi_nDB == 0) {
 284                         /* no database of this type, don't open */
 285                         continue;
 286                 }
 287
 288                 if( bi->bi_open ) {
 289                         rc = bi->bi_open( bi );
 290                         if ( rc != 0 ) {
 291                                 Debug( LDAP_DEBUG_ANY,
 292                                         "backend_startup: bi_open %d (%s) failed!\n",
 293                                         i, bi->bi_type, 0 );
 294                                 return rc;
 295                         }
 296                 }
 297
 298                 (void)backend_init_controls( bi );
 299         }
 300
 301         /* open each backend database */
 302         i = -1;
 303         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 304                 i++;
 305                 if ( be->be_suffix == NULL ) {
 306                         Debug( LDAP_DEBUG_ANY,
 307                                 "backend_startup: warning, database %d (%s) "
 308                                 "has no suffix\n",
 309                                 i, be->bd_info->bi_type, 0 );
 310                 }
 311
 312                 rc = backend_startup_one( be, &cr );
 313
 314                 if ( rc ) return rc;
 315         }
 316
 317         return rc;
 318 }
 319
 320 int backend_num( Backend *be )
 321 {
 322         int i = 0;
 323         BackendDB *b2;
 324
 325         if( be == NULL ) return -1;
 326
 327         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 328                 if( be == b2 ) return i;
 329                 i++;
 330         }
 331         return -1;
 332 }
 333
 334 int backend_shutdown( Backend *be )
 335 {
 336         int rc = 0;
 337         BackendInfo *bi;
 338
 339         if( be != NULL ) {
 340                 /* shutdown a specific backend database */
 341
 342                 if ( be->bd_info->bi_nDB == 0 ) {
 343                         /* no database of this type, we never opened it */
 344                         return 0;
 345                 }
 346
 347                 if ( be->bd_info->bi_db_close ) {
 348                         rc = be->bd_info->bi_db_close( be, NULL );
 349                         if ( rc ) return rc;
 350                 }
 351
 352                 if( be->bd_info->bi_close ) {
 353                         rc = be->bd_info->bi_close( be->bd_info );
 354                         if ( rc ) return rc;
 355                 }
 356
 357                 return 0;
 358         }
 359
 360         /* close each backend database */
 361         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 362                 if ( be->bd_info->bi_db_close ) {
 363                         be->bd_info->bi_db_close( be, NULL );
 364                 }
 365
 366                 if(rc != 0) {
 367                         Debug( LDAP_DEBUG_ANY,
 368                                 "backend_close: bi_db_close %s failed!\n",
 369                                 be->be_type, 0, 0 );
 370                 }
 371         }
 372
 373         /* close each backend type */
 374         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 375                 if( bi->bi_nDB == 0 ) {
 376                         /* no database of this type */
 377                         continue;
 378                 }
 379
 380                 if( bi->bi_close ) {
 381                         bi->bi_close( bi );
 382                 }
 383         }
 384
 385         /* close frontend, if required */
 386         if ( frontendDB->bd_info->bi_db_close ) {
 387                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 388                 if ( rc != 0 ) {
 389                         Debug( LDAP_DEBUG_ANY,
 390                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 391                                 rc, 0, 0 );
 392                 }
 393         }
 394
 395         return 0;
 396 }
 397
 398 /*
 399  * This function is supposed to be the exact counterpart
 400  * of backend_startup_one(), although this one calls bi_db_destroy()
 401  * while backend_startup_one() calls bi_db_open().
 402  *
 403  * Make sure backend_stopdown_one() destroys resources allocated
 404  * by backend_startup_one(); only call backend_destroy_one() when
 405  * all stuff in a BackendDB needs to be destroyed
 406  */
 407 void
 408 backend_stopdown_one( BackendDB *bd )
 409 {
 410         if ( bd->be_pending_csn_list ) {
 411                 struct slap_csn_entry *csne;
 412                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 413                 while ( csne ) {
 414                         struct slap_csn_entry *tmp_csne = csne;
 415
 416                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 417                         ch_free( csne->ce_csn.bv_val );
 418                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 419                         ch_free( tmp_csne );
 420                 }
 421                 ch_free( bd->be_pending_csn_list );
 422         }
 423
 424         if ( bd->bd_info->bi_db_destroy ) {
 425                 bd->bd_info->bi_db_destroy( bd, NULL );
 426         }
 427 }
 428
 429 void backend_destroy_one( BackendDB *bd, int dynamic )
 430 {
 431         if ( dynamic ) {
 432                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 433         }
 434
 435         if ( bd->be_syncinfo ) {
 436                 syncinfo_free( bd->be_syncinfo, 1 );
 437         }
 438
 439         backend_stopdown_one( bd );
 440
 441         ber_bvarray_free( bd->be_suffix );
 442         ber_bvarray_free( bd->be_nsuffix );
 443         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 444                 free( bd->be_rootdn.bv_val );
 445         }
 446         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 447                 free( bd->be_rootndn.bv_val );
 448         }
 449         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 450                 free( bd->be_rootpw.bv_val );
 451         }
 452         acl_destroy( bd->be_acl );
 453         limits_destroy( bd->be_limits );
 454         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 455                 ch_free( bd->be_update_ndn.bv_val );
 456         }
 457         if ( bd->be_update_refs ) {
 458                 ber_bvarray_free( bd->be_update_refs );
 459         }
 460
 461         if ( dynamic ) {
 462                 free( bd );
 463         }
 464 }
 465
 466 int backend_destroy(void)
 467 {
 468         BackendDB *bd;
 469         BackendInfo *bi;
 470
 471         /* destroy each backend database */
 472         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 473                 backend_destroy_one( bd, 1 );
 474         }
 475
 476         /* destroy each backend type */
 477         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 478                 if( bi->bi_destroy ) {
 479                         bi->bi_destroy( bi );
 480                 }
 481         }
 482
 483         nBackendInfo = 0;
 484         LDAP_STAILQ_INIT(&backendInfo);
 485
 486         /* destroy frontend database */
 487         bd = frontendDB;
 488         if ( bd ) {
 489                 if ( bd->bd_info->bi_db_destroy ) {
 490                         bd->bd_info->bi_db_destroy( bd, NULL );
 491                 }
 492                 ber_bvarray_free( bd->be_suffix );
 493                 ber_bvarray_free( bd->be_nsuffix );
 494                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 495                         free( bd->be_rootdn.bv_val );
 496                 }
 497                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 498                         free( bd->be_rootndn.bv_val );
 499                 }
 500                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 501                         free( bd->be_rootpw.bv_val );
 502                 }
 503                 acl_destroy( bd->be_acl );
 504                 frontendDB = NULL;
 505         }
 506
 507         return 0;
 508 }
 509
 510 BackendInfo* backend_info(const char *type)
 511 {
 512         BackendInfo *bi;
 513
 514         /* search for the backend type */
 515         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 516                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 517                         return bi;
 518                 }
 519         }
 520
 521         return NULL;
 522 }
 523
 524 void
 525 backend_db_insert(
 526         BackendDB *be,
 527         int idx
 528 )
 529 {
 530         /* If idx < 0, just add to end of list */
 531         if ( idx < 0 ) {
 532                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 533         } else if ( idx == 0 ) {
 534                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 535         } else {
 536                 int i;
 537                 BackendDB *b2;
 538
 539                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 540                 idx--;
 541                 for (i=0; i<idx; i++) {
 542                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 543                 }
 544                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 545         }
 546 }
 547
 548 void
 549 backend_db_move(
 550         BackendDB *be,
 551         int idx
 552 )
 553 {
 554         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 555         backend_db_insert(be, idx);
 556 }
 557
 558 BackendDB *
 559 backend_db_init(
 560     const char  *type,
 561         BackendDB *b0,
 562         int idx,
 563         ConfigReply *cr)
 564 {
 565         BackendInfo *bi = backend_info(type);
 566         BackendDB *be = b0;
 567         int     rc = 0;
 568
 569         if( bi == NULL ) {
 570                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 571                 return NULL;
 572         }
 573
 574         /* If be is provided, treat it as private. Otherwise allocate
 575          * one and add it to the global list.
 576          */
 577         if ( !be ) {
 578                 be = ch_calloc( 1, sizeof(Backend) );
 579                 /* Just append */
 580                 if ( idx >= nbackends )
 581                         idx = -1;
 582                 nbackends++;
 583                 backend_db_insert( be, idx );
 584         }
 585
 586         be->bd_info = bi;
 587         be->bd_self = be;
 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         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 597
 598         /* assign a default depth limit for alias deref */
 599         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 600
 601         if ( bi->bi_db_init ) {
 602                 rc = bi->bi_db_init( be, cr );
 603         }
 604
 605         if ( rc != 0 ) {
 606                 fprintf( stderr, "database init failed (%s)\n", type );
 607                 /* If we created and linked this be, remove it and free it */
 608                 if ( !b0 ) {
 609                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 610                         ch_free( be );
 611                         be = NULL;
 612                         nbackends--;
 613                 }
 614         } else {
 615                 if ( !bi->bi_nDB ) {
 616                         backend_init_controls( bi );
 617                 }
 618                 bi->bi_nDB++;
 619         }
 620         return( be );
 621 }
 622
 623 void
 624 be_db_close( void )
 625 {
 626         BackendDB *be;
 627
 628         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 629                 if ( be->bd_info->bi_db_close ) {
 630                         be->bd_info->bi_db_close( be, NULL );
 631                 }
 632         }
 633
 634         if ( frontendDB->bd_info->bi_db_close ) {
 635                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 636         }
 637
 638 }
 639
 640 Backend *
 641 select_backend(
 642         struct berval * dn,
 643         int noSubs )
 644 {
 645         int             j;
 646         ber_len_t       len, dnlen = dn->bv_len;
 647         Backend         *be;
 648
 649         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 650                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 651                         continue;
 652                 }
 653
 654                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 655                 {
 656                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 657                         {
 658                                 continue;
 659                         }
 660
 661                         len = be->be_nsuffix[j].bv_len;
 662
 663                         if ( len > dnlen ) {
 664                                 /* suffix is longer than DN */
 665                                 continue;
 666                         }
 667
 668                         /*
 669                          * input DN is normalized, so the separator check
 670                          * need not look at escaping
 671                          */
 672                         if ( len && len < dnlen &&
 673                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 674                         {
 675                                 continue;
 676                         }
 677
 678                         if ( strcmp( be->be_nsuffix[j].bv_val,
 679                                 &dn->bv_val[dnlen-len] ) == 0 )
 680                         {
 681                                 return be;
 682                         }
 683                 }
 684         }
 685
 686         return be;
 687 }
 688
 689 int
 690 be_issuffix(
 691     Backend *be,
 692     struct berval *bvsuffix )
 693 {
 694         int     i;
 695
 696         if ( be->be_nsuffix == NULL ) {
 697                 return 0;
 698         }
 699
 700         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 701                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 702                         return 1;
 703                 }
 704         }
 705
 706         return 0;
 707 }
 708
 709 int
 710 be_issubordinate(
 711     Backend *be,
 712     struct berval *bvsubordinate )
 713 {
 714         int     i;
 715
 716         if ( be->be_nsuffix == NULL ) {
 717                 return 0;
 718         }
 719
 720         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 721                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 722                         return 1;
 723                 }
 724         }
 725
 726         return 0;
 727 }
 728
 729 int
 730 be_isroot_dn( Backend *be, struct berval *ndn )
 731 {
 732         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 733                 return 0;
 734         }
 735
 736         return dn_match( &be->be_rootndn, ndn );
 737 }
 738
 739 int
 740 be_slurp_update( Operation *op )
 741 {
 742         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 743                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 744 }
 745
 746 int
 747 be_shadow_update( Operation *op )
 748 {
 749         /* This assumes that all internal ops (connid == -1) on a syncrepl
 750          * database are syncrepl operations.
 751          */
 752         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 753                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 754 }
 755
 756 int
 757 be_isupdate_dn( Backend *be, struct berval *ndn )
 758 {
 759         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 760                 return 0;
 761         }
 762
 763         return dn_match( &be->be_update_ndn, ndn );
 764 }
 765
 766 struct berval *
 767 be_root_dn( Backend *be )
 768 {
 769         return &be->be_rootdn;
 770 }
 771
 772 int
 773 be_isroot( Operation *op )
 774 {
 775         return be_isroot_dn( op->o_bd, &op->o_ndn );
 776 }
 777
 778 int
 779 be_isroot_pw( Operation *op )
 780 {
 781         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 782 }
 783
 784 /*
 785  * checks if binding as rootdn
 786  *
 787  * return value:
 788  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 789  *      LDAP_SUCCESS                    if rootdn & rootpw
 790  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 791  *
 792  * if rs != NULL
 793  *      if LDAP_SUCCESS, op->orb_edn is set
 794  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 795  */
 796 int
 797 be_rootdn_bind( Operation *op, SlapReply *rs )
 798 {
 799         int             rc;
 800 #ifdef SLAPD_SPASSWD
 801         void    *old_authctx = NULL;
 802 #endif
 803
 804         assert( op->o_tag == LDAP_REQ_BIND );
 805         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 806
 807         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 808                 return SLAP_CB_CONTINUE;
 809         }
 810
 811         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 812                 /* give the database a chance */
 813                 return SLAP_CB_CONTINUE;
 814         }
 815
 816         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 817                 /* rootdn bind explicitly disallowed */
 818                 rc = LDAP_INVALID_CREDENTIALS;
 819                 if ( rs ) {
 820                         goto send_result;
 821                 }
 822
 823                 return rc;
 824         }
 825
 826 #ifdef SLAPD_SPASSWD
 827         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 828                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 829 #endif
 830
 831         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 832
 833 #ifdef SLAPD_SPASSWD
 834         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 835                 old_authctx, 0, NULL, NULL );
 836 #endif
 837
 838         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 839         if ( rs ) {
 840 send_result:;
 841                 rs->sr_err = rc;
 842
 843                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 844                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 845                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 846
 847                 if ( rc == LDAP_SUCCESS ) {
 848                         /* Set to the pretty rootdn */
 849                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 850
 851                 } else {
 852                         send_ldap_result( op, rs );
 853                 }
 854         }
 855
 856         return rc;
 857 }
 858
 859 int
 860 be_entry_release_rw(
 861         Operation *op,
 862         Entry *e,
 863         int rw )
 864 {
 865         if ( op->o_bd->be_release ) {
 866                 /* free and release entry from backend */
 867                 return op->o_bd->be_release( op, e, rw );
 868         } else {
 869                 /* free entry */
 870                 entry_free( e );
 871                 return 0;
 872         }
 873 }
 874
 875 int
 876 backend_unbind( Operation *op, SlapReply *rs )
 877 {
 878         BackendDB *be;
 879
 880         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 881                 if ( be->be_unbind ) {
 882                         op->o_bd = be;
 883                         be->be_unbind( op, rs );
 884                 }
 885         }
 886
 887         return 0;
 888 }
 889
 890 int
 891 backend_connection_init(
 892         Connection   *conn )
 893 {
 894         BackendDB *be;
 895
 896         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 897                 if ( be->be_connection_init ) {
 898                         be->be_connection_init( be, conn );
 899                 }
 900         }
 901
 902         return 0;
 903 }
 904
 905 int
 906 backend_connection_destroy(
 907         Connection   *conn )
 908 {
 909         BackendDB *be;
 910
 911         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 912                 if ( be->be_connection_destroy ) {
 913                         be->be_connection_destroy( be, conn);
 914                 }
 915         }
 916
 917         return 0;
 918 }
 919
 920 int
 921 backend_check_controls(
 922         Operation *op,
 923         SlapReply *rs )
 924 {
 925         LDAPControl **ctrls = op->o_ctrls;
 926         rs->sr_err = LDAP_SUCCESS;
 927
 928         if( ctrls ) {
 929                 for( ; *ctrls != NULL ; ctrls++ ) {
 930                         int cid;
 931
 932                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 933                         case LDAP_CONTROL_NOT_FOUND:
 934                                 /* unrecognized control */
 935                                 if ( (*ctrls)->ldctl_iscritical ) {
 936                                         /* should not be reachable */
 937                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 938                                                 "unrecognized critical control: %s\n",
 939                                                 (*ctrls)->ldctl_oid, 0, 0 );
 940                                         assert( 0 );
 941                                 } else {
 942                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 943                                                 "unrecognized non-critical control: %s\n",
 944                                                 (*ctrls)->ldctl_oid, 0, 0 );
 945                                 }
 946                                 break;
 947
 948                         case LDAP_COMPARE_FALSE:
 949                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 950 #ifdef SLAP_CONTROL_X_WHATFAILED
 951                                         if ( get_whatFailed( op ) ) {
 952                                                 char *oids[ 2 ];
 953                                                 oids[ 0 ] = (*ctrls)->ldctl_oid;
 954                                                 oids[ 1 ] = NULL;
 955                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 956                                         }
 957 #endif
 958                                         /* RFC 4511 allows unavailableCriticalExtension to be
 959                                          * returned when the server is unwilling to perform
 960                                          * an operation extended by a recognized critical
 961                                          * control.
 962                                          */
 963                                         rs->sr_text = "critical control unavailable in context";
 964                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 965                                         goto done;
 966                                 }
 967                                 break;
 968
 969                         case LDAP_COMPARE_TRUE:
 970                                 break;
 971
 972                         default:
 973                                 /* unreachable */
 974                                 Debug( LDAP_DEBUG_ANY,
 975                                         "backend_check_controls: unable to check control: %s\n",
 976                                         (*ctrls)->ldctl_oid, 0, 0 );
 977                                 assert( 0 );
 978
 979                                 rs->sr_text = "unable to check control";
 980                                 rs->sr_err = LDAP_OTHER;
 981                                 goto done;
 982                         }
 983                 }
 984         }
 985
 986 #if 0 /* temporarily removed */
 987         /* check should be generalized */
 988         if( get_relax(op) && !be_isroot(op)) {
 989                 rs->sr_text = "requires manager authorization";
 990                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 991         }
 992 #endif
 993
 994 done:;
 995         return rs->sr_err;
 996 }
 997
 998 int
 999 backend_check_restrictions(
1000         Operation *op,
1001         SlapReply *rs,
1002         struct berval *opdata )
1003 {
1004         slap_mask_t restrictops;
1005         slap_mask_t requires;
1006         slap_mask_t opflag;
1007         slap_mask_t exopflag = 0;
1008         slap_ssf_set_t ssfs, *ssf;
1009         int updateop = 0;
1010         int starttls = 0;
1011         int session = 0;
1012
1013         restrictops = frontendDB->be_restrictops;
1014         requires = frontendDB->be_requires;
1015         ssfs = frontendDB->be_ssf_set;
1016         ssf = &ssfs;
1017
1018         if ( op->o_bd ) {
1019                 slap_ssf_t *fssf, *bssf;
1020                 int     rc = SLAP_CB_CONTINUE, i;
1021
1022                 if ( op->o_bd->be_chk_controls ) {
1023                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1024                 }
1025
1026                 if ( rc == SLAP_CB_CONTINUE ) {
1027                         rc = backend_check_controls( op, rs );
1028                 }
1029
1030                 if ( rc != LDAP_SUCCESS ) {
1031                         return rs->sr_err;
1032                 }
1033
1034                 restrictops |= op->o_bd->be_restrictops;
1035                 requires |= op->o_bd->be_requires;
1036                 bssf = &op->o_bd->be_ssf_set.sss_ssf;
1037                 fssf = &ssfs.sss_ssf;
1038                 for ( i=0; i<sizeof(ssfs)/sizeof(slap_ssf_t); i++ ) {
1039                         if ( bssf[i] ) fssf[i] = bssf[i];
1040                 }
1041         }
1042
1043         switch( op->o_tag ) {
1044         case LDAP_REQ_ADD:
1045                 opflag = SLAP_RESTRICT_OP_ADD;
1046                 updateop++;
1047                 break;
1048         case LDAP_REQ_BIND:
1049                 opflag = SLAP_RESTRICT_OP_BIND;
1050                 session++;
1051                 break;
1052         case LDAP_REQ_COMPARE:
1053                 opflag = SLAP_RESTRICT_OP_COMPARE;
1054                 break;
1055         case LDAP_REQ_DELETE:
1056                 updateop++;
1057                 opflag = SLAP_RESTRICT_OP_DELETE;
1058                 break;
1059         case LDAP_REQ_EXTENDED:
1060                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1061
1062                 if( !opdata ) {
1063                         /* treat unspecified as a modify */
1064                         opflag = SLAP_RESTRICT_OP_MODIFY;
1065                         updateop++;
1066                         break;
1067                 }
1068
1069                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1070                         session++;
1071                         starttls++;
1072                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1073                         break;
1074                 }
1075
1076                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1077                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1078                         break;
1079                 }
1080
1081                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1082                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1083                         break;
1084                 }
1085
1086                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1087                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1088                         updateop++;
1089                         break;
1090                 }
1091
1092                 /* treat everything else as a modify */
1093                 opflag = SLAP_RESTRICT_OP_MODIFY;
1094                 updateop++;
1095                 break;
1096
1097         case LDAP_REQ_MODIFY:
1098                 updateop++;
1099                 opflag = SLAP_RESTRICT_OP_MODIFY;
1100                 break;
1101         case LDAP_REQ_RENAME:
1102                 updateop++;
1103                 opflag = SLAP_RESTRICT_OP_RENAME;
1104                 break;
1105         case LDAP_REQ_SEARCH:
1106                 opflag = SLAP_RESTRICT_OP_SEARCH;
1107                 break;
1108         case LDAP_REQ_UNBIND:
1109                 session++;
1110                 opflag = 0;
1111                 break;
1112         default:
1113                 rs->sr_text = "restrict operations internal error";
1114                 rs->sr_err = LDAP_OTHER;
1115                 return rs->sr_err;
1116         }
1117
1118         if ( !starttls ) {
1119                 /* these checks don't apply to StartTLS */
1120
1121                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1122                 if( op->o_transport_ssf < ssf->sss_transport ) {
1123                         rs->sr_text = op->o_transport_ssf
1124                                 ? "stronger transport confidentiality required"
1125                                 : "transport confidentiality required";
1126                         return rs->sr_err;
1127                 }
1128
1129                 if( op->o_tls_ssf < ssf->sss_tls ) {
1130                         rs->sr_text = op->o_tls_ssf
1131                                 ? "stronger TLS confidentiality required"
1132                                 : "TLS confidentiality required";
1133                         return rs->sr_err;
1134                 }
1135
1136
1137                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1138                         /* simple bind specific check */
1139                         if( op->o_ssf < ssf->sss_simple_bind ) {
1140                                 rs->sr_text = op->o_ssf
1141                                         ? "stronger confidentiality required"
1142                                         : "confidentiality required";
1143                                 return rs->sr_err;
1144                         }
1145                 }
1146
1147                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1148                         /* these checks don't apply to SASL bind */
1149
1150                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1151                                 rs->sr_text = op->o_sasl_ssf
1152                                         ? "stronger SASL confidentiality required"
1153                                         : "SASL confidentiality required";
1154                                 return rs->sr_err;
1155                         }
1156
1157                         if( op->o_ssf < ssf->sss_ssf ) {
1158                                 rs->sr_text = op->o_ssf
1159                                         ? "stronger confidentiality required"
1160                                         : "confidentiality required";
1161                                 return rs->sr_err;
1162                         }
1163                 }
1164
1165                 if( updateop ) {
1166                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1167                                 rs->sr_text = op->o_transport_ssf
1168                                         ? "stronger transport confidentiality required for update"
1169                                         : "transport confidentiality required for update";
1170                                 return rs->sr_err;
1171                         }
1172
1173                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1174                                 rs->sr_text = op->o_tls_ssf
1175                                         ? "stronger TLS confidentiality required for update"
1176                                         : "TLS confidentiality required for update";
1177                                 return rs->sr_err;
1178                         }
1179
1180                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1181                                 rs->sr_text = op->o_sasl_ssf
1182                                         ? "stronger SASL confidentiality required for update"
1183                                         : "SASL confidentiality required for update";
1184                                 return rs->sr_err;
1185                         }
1186
1187                         if( op->o_ssf < ssf->sss_update_ssf ) {
1188                                 rs->sr_text = op->o_ssf
1189                                         ? "stronger confidentiality required for update"
1190                                         : "confidentiality required for update";
1191                                 return rs->sr_err;
1192                         }
1193
1194                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1195                                 BER_BVISEMPTY( &op->o_ndn ) )
1196                         {
1197                                 rs->sr_text = "modifications require authentication";
1198                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1199                                 return rs->sr_err;
1200                         }
1201
1202 #ifdef SLAP_X_LISTENER_MOD
1203                         if ( op->o_conn->c_listener &&
1204                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1205                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1206                         {
1207                                 /* no "w" mode means readonly */
1208                                 rs->sr_text = "modifications not allowed on this listener";
1209                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1210                                 return rs->sr_err;
1211                         }
1212 #endif /* SLAP_X_LISTENER_MOD */
1213                 }
1214         }
1215
1216         if ( !session ) {
1217                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1218
1219                 if( requires & SLAP_REQUIRE_STRONG ) {
1220                         /* should check mechanism */
1221                         if( ( op->o_transport_ssf < ssf->sss_transport
1222                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1223                                 || BER_BVISEMPTY( &op->o_dn ) )
1224                         {
1225                                 rs->sr_text = "strong(er) authentication required";
1226                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1227                                 return rs->sr_err;
1228                         }
1229                 }
1230
1231                 if( requires & SLAP_REQUIRE_SASL ) {
1232                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1233                                 rs->sr_text = "SASL authentication required";
1234                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1235                                 return rs->sr_err;
1236                         }
1237                 }
1238
1239                 if( requires & SLAP_REQUIRE_AUTHC ) {
1240                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1241                                 rs->sr_text = "authentication required";
1242                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1243                                 return rs->sr_err;
1244                         }
1245                 }
1246
1247                 if( requires & SLAP_REQUIRE_BIND ) {
1248                         int version;
1249                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1250                         version = op->o_conn->c_protocol;
1251                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1252
1253                         if( !version ) {
1254                                 /* no bind has occurred */
1255                                 rs->sr_text = "BIND required";
1256                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1257                                 return rs->sr_err;
1258                         }
1259                 }
1260
1261                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1262                         if( op->o_protocol < LDAP_VERSION3 ) {
1263                                 /* no bind has occurred */
1264                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1265                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1266                                 return rs->sr_err;
1267                         }
1268                 }
1269
1270 #ifdef SLAP_X_LISTENER_MOD
1271                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1272                         if ( op->o_conn->c_listener &&
1273                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1274                 {
1275                                 /* no "x" mode means bind required */
1276                                 rs->sr_text = "bind required on this listener";
1277                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1278                                 return rs->sr_err;
1279                         }
1280                 }
1281
1282                 if ( !starttls && !updateop ) {
1283                         if ( op->o_conn->c_listener &&
1284                                 !( op->o_conn->c_listener->sl_perms &
1285                                         ( !BER_BVISEMPTY( &op->o_dn )
1286                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1287                         {
1288                                 /* no "r" mode means no read */
1289                                 rs->sr_text = "read not allowed on this listener";
1290                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1291                                 return rs->sr_err;
1292                         }
1293                 }
1294 #endif /* SLAP_X_LISTENER_MOD */
1295
1296         }
1297
1298         if( ( restrictops & opflag )
1299                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1300                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1301                         rs->sr_text = "read operations restricted";
1302                 } else if ( restrictops & exopflag ) {
1303                         rs->sr_text = "extended operation restricted";
1304                 } else {
1305                         rs->sr_text = "operation restricted";
1306                 }
1307                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1308                 return rs->sr_err;
1309         }
1310
1311         rs->sr_err = LDAP_SUCCESS;
1312         return rs->sr_err;
1313 }
1314
1315 int backend_check_referrals( Operation *op, SlapReply *rs )
1316 {
1317         rs->sr_err = LDAP_SUCCESS;
1318
1319         if( op->o_bd->be_chk_referrals ) {
1320                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1321
1322                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1323                         send_ldap_result( op, rs );
1324                 }
1325         }
1326
1327         return rs->sr_err;
1328 }
1329
1330 int
1331 be_entry_get_rw(
1332         Operation *op,
1333         struct berval *ndn,
1334         ObjectClass *oc,
1335         AttributeDescription *at,
1336         int rw,
1337         Entry **e )
1338 {
1339         *e = NULL;
1340
1341         if ( op->o_bd == NULL ) {
1342                 return LDAP_NO_SUCH_OBJECT;
1343         }
1344
1345         if ( op->o_bd->be_fetch ) {
1346                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1347         }
1348
1349         return LDAP_UNWILLING_TO_PERFORM;
1350 }
1351
1352 int
1353 fe_acl_group(
1354         Operation *op,
1355         Entry   *target,
1356         struct berval *gr_ndn,
1357         struct berval *op_ndn,
1358         ObjectClass *group_oc,
1359         AttributeDescription *group_at )
1360 {
1361         Entry *e;
1362         void *o_priv = op->o_private, *e_priv = NULL;
1363         Attribute *a;
1364         int rc;
1365         GroupAssertion *g;
1366         Backend *be = op->o_bd;
1367         OpExtra         *oex;
1368
1369         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1370                 if ( oex->oe_key == (void *)backend_group )
1371                         break;
1372         }
1373
1374         if ( oex && ((OpExtraDB *)oex)->oe_db )
1375                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1376
1377         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1378                 op->o_bd = select_backend( gr_ndn, 0 );
1379
1380         for ( g = op->o_groups; g; g = g->ga_next ) {
1381                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1382                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1383                 {
1384                         continue;
1385                 }
1386                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1387                         break;
1388                 }
1389         }
1390
1391         if ( g ) {
1392                 rc = g->ga_res;
1393                 goto done;
1394         }
1395
1396         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1397                 e = target;
1398                 rc = 0;
1399
1400         } else {
1401                 op->o_private = NULL;
1402                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1403                 e_priv = op->o_private;
1404                 op->o_private = o_priv;
1405         }
1406
1407         if ( e ) {
1408                 a = attr_find( e->e_attrs, group_at );
1409                 if ( a ) {
1410                         /* If the attribute is a subtype of labeledURI,
1411                          * treat this as a dynamic group ala groupOfURLs
1412                          */
1413                         if ( is_at_subtype( group_at->ad_type,
1414                                 slap_schema.si_ad_labeledURI->ad_type ) )
1415                         {
1416                                 int i;
1417                                 LDAPURLDesc *ludp;
1418                                 struct berval bv, nbase;
1419                                 Filter *filter;
1420                                 Entry *user = NULL;
1421                                 void *user_priv = NULL;
1422                                 Backend *b2 = op->o_bd;
1423
1424                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1425                                         user = target;
1426                                 }
1427
1428                                 rc = LDAP_COMPARE_FALSE;
1429                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1430                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1431                                                 LDAP_URL_SUCCESS )
1432                                         {
1433                                                 continue;
1434                                         }
1435
1436                                         BER_BVZERO( &nbase );
1437
1438                                         /* host, attrs and extensions parts must be empty */
1439                                         if ( ( ludp->lud_host && *ludp->lud_host )
1440                                                 || ludp->lud_attrs
1441                                                 || ludp->lud_exts )
1442                                         {
1443                                                 goto loopit;
1444                                         }
1445
1446                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1447                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1448                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1449                                         {
1450                                                 goto loopit;
1451                                         }
1452
1453                                         switch ( ludp->lud_scope ) {
1454                                         case LDAP_SCOPE_BASE:
1455                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1456                                                         goto loopit;
1457                                                 }
1458                                                 break;
1459                                         case LDAP_SCOPE_ONELEVEL:
1460                                                 dnParent( op_ndn, &bv );
1461                                                 if ( !dn_match( &nbase, &bv ) ) {
1462                                                         goto loopit;
1463                                                 }
1464                                                 break;
1465                                         case LDAP_SCOPE_SUBTREE:
1466                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1467                                                         goto loopit;
1468                                                 }
1469                                                 break;
1470                                         case LDAP_SCOPE_SUBORDINATE:
1471                                                 if ( dn_match( &nbase, op_ndn ) ||
1472                                                         !dnIsSuffix( op_ndn, &nbase ) )
1473                                                 {
1474                                                         goto loopit;
1475                                                 }
1476                                         }
1477
1478                                         /* NOTE: this could be NULL
1479                                          * if no filter is provided,
1480                                          * or if filter parsing fails.
1481                                          * In the latter case,
1482                                          * we should give up. */
1483                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1484                                                 filter = str2filter_x( op, ludp->lud_filter );
1485                                                 if ( filter == NULL ) {
1486                                                         /* give up... */
1487                                                         rc = LDAP_OTHER;
1488                                                         goto loopit;
1489                                                 }
1490
1491                                                 /* only get user if required
1492                                                  * and not available yet */
1493                                                 if ( user == NULL ) {
1494                                                         int rc2;
1495
1496                                                         op->o_bd = select_backend( op_ndn, 0 );
1497                                                         op->o_private = NULL;
1498                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1499                                                         user_priv = op->o_private;
1500                                                         op->o_private = o_priv;
1501                                                         if ( rc2 != 0 ) {
1502                                                                 /* give up... */
1503                                                                 rc = LDAP_OTHER;
1504                                                                 goto loopit;
1505                                                         }
1506                                                 }
1507
1508                                                 if ( test_filter( NULL, user, filter ) ==
1509                                                         LDAP_COMPARE_TRUE )
1510                                                 {
1511                                                         rc = 0;
1512                                                 }
1513                                                 filter_free_x( op, filter, 1 );
1514                                         }
1515 loopit:
1516                                         ldap_free_urldesc( ludp );
1517                                         if ( !BER_BVISNULL( &nbase ) ) {
1518                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1519                                         }
1520                                         if ( rc != LDAP_COMPARE_FALSE ) {
1521                                                 break;
1522                                         }
1523                                 }
1524
1525                                 if ( user != NULL && user != target ) {
1526                                         op->o_private = user_priv;
1527                                         be_entry_release_r( op, user );
1528                                         op->o_private = o_priv;
1529                                 }
1530                                 op->o_bd = b2;
1531
1532                         } else {
1533                                 rc = attr_valfind( a,
1534                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1535                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1536                                         op_ndn, NULL, op->o_tmpmemctx );
1537                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1538                                         rc = LDAP_COMPARE_FALSE;
1539                                 }
1540                         }
1541
1542                 } else {
1543                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1544                 }
1545
1546                 if ( e != target ) {
1547                         op->o_private = e_priv;
1548                         be_entry_release_r( op, e );
1549                         op->o_private = o_priv;
1550                 }
1551
1552         } else {
1553                 rc = LDAP_NO_SUCH_OBJECT;
1554         }
1555
1556         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1557                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1558                         op->o_tmpmemctx );
1559                 g->ga_be = op->o_bd;
1560                 g->ga_oc = group_oc;
1561                 g->ga_at = group_at;
1562                 g->ga_res = rc;
1563                 g->ga_len = gr_ndn->bv_len;
1564                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1565                 g->ga_next = op->o_groups;
1566                 op->o_groups = g;
1567         }
1568
1569 done:
1570         op->o_bd = be;
1571         return rc;
1572 }
1573
1574 int
1575 backend_group(
1576         Operation *op,
1577         Entry   *target,
1578         struct berval *gr_ndn,
1579         struct berval *op_ndn,
1580         ObjectClass *group_oc,
1581         AttributeDescription *group_at )
1582 {
1583         int                     rc;
1584         BackendDB *be_orig;
1585         OpExtraDB       oex;
1586
1587         if ( op->o_abandon ) {
1588                 return SLAPD_ABANDON;
1589         }
1590
1591         oex.oe_db = op->o_bd;
1592         oex.oe.oe_key = (void *)backend_group;
1593         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1594
1595         be_orig = op->o_bd;
1596         op->o_bd = frontendDB;
1597         rc = frontendDB->be_group( op, target, gr_ndn,
1598                 op_ndn, group_oc, group_at );
1599         op->o_bd = be_orig;
1600         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1601
1602         return rc;
1603 }
1604
1605 int
1606 fe_acl_attribute(
1607         Operation *op,
1608         Entry   *target,
1609         struct berval   *edn,
1610         AttributeDescription *entry_at,
1611         BerVarray *vals,
1612         slap_access_t access )
1613 {
1614         Entry                   *e = NULL;
1615         void                    *o_priv = op->o_private, *e_priv = NULL;
1616         Attribute               *a = NULL;
1617         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1618         AccessControlState      acl_state = ACL_STATE_INIT;
1619         Backend                 *be = op->o_bd;
1620         OpExtra         *oex;
1621
1622         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1623                 if ( oex->oe_key == (void *)backend_attribute )
1624                         break;
1625         }
1626
1627         if ( oex && ((OpExtraDB *)oex)->oe_db )
1628                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1629
1630         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1631                 op->o_bd = select_backend( edn, 0 );
1632
1633         if ( target && dn_match( &target->e_nname, edn ) ) {
1634                 e = target;
1635
1636         } else {
1637                 op->o_private = NULL;
1638                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1639                 e_priv = op->o_private;
1640                 op->o_private = o_priv;
1641         }
1642
1643         if ( e ) {
1644                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1645                         assert( vals == NULL );
1646
1647                         rc = LDAP_SUCCESS;
1648                         if ( op->o_conn && access > ACL_NONE &&
1649                                 access_allowed( op, e, entry_at, NULL,
1650                                                 access, &acl_state ) == 0 )
1651                         {
1652                                 rc = LDAP_INSUFFICIENT_ACCESS;
1653                         }
1654                         goto freeit;
1655                 }
1656
1657                 a = attr_find( e->e_attrs, entry_at );
1658                 if ( a == NULL ) {
1659                         SlapReply       rs = { 0 };
1660                         AttributeName   anlist[ 2 ];
1661
1662                         anlist[ 0 ].an_name = entry_at->ad_cname;
1663                         anlist[ 0 ].an_desc = entry_at;
1664                         BER_BVZERO( &anlist[ 1 ].an_name );
1665                         rs.sr_attrs = anlist;
1666
1667                         /* NOTE: backend_operational() is also called
1668                          * when returning results, so it's supposed
1669                          * to do no harm to entries */
1670                         rs.sr_entry = e;
1671                         rc = backend_operational( op, &rs );
1672                         rs.sr_entry = NULL;
1673
1674                         if ( rc == LDAP_SUCCESS ) {
1675                                 if ( rs.sr_operational_attrs ) {
1676                                         freeattr = 1;
1677                                         a = rs.sr_operational_attrs;
1678
1679                                 } else {
1680                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1681                                 }
1682                         }
1683                 }
1684
1685                 if ( a ) {
1686                         BerVarray v;
1687
1688                         if ( op->o_conn && access > ACL_NONE &&
1689                                 access_allowed( op, e, entry_at, NULL,
1690                                                 access, &acl_state ) == 0 )
1691                         {
1692                                 rc = LDAP_INSUFFICIENT_ACCESS;
1693                                 goto freeit;
1694                         }
1695
1696                         i = a->a_numvals;
1697                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1698                                 op->o_tmpmemctx );
1699                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1700                         {
1701                                 if ( op->o_conn && access > ACL_NONE &&
1702                                         access_allowed( op, e, entry_at,
1703                                                         &a->a_nvals[i],
1704                                                         access,
1705                                                         &acl_state ) == 0 )
1706                                 {
1707                                         continue;
1708                                 }
1709                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1710                                                 op->o_tmpmemctx );
1711                                 if ( !BER_BVISNULL( &v[j] ) ) {
1712                                         j++;
1713                                 }
1714                         }
1715                         if ( j == 0 ) {
1716                                 op->o_tmpfree( v, op->o_tmpmemctx );
1717                                 *vals = NULL;
1718                                 rc = LDAP_INSUFFICIENT_ACCESS;
1719
1720                         } else {
1721                                 BER_BVZERO( &v[j] );
1722                                 *vals = v;
1723                                 rc = LDAP_SUCCESS;
1724                         }
1725                 }
1726 freeit:         if ( e != target ) {
1727                         op->o_private = e_priv;
1728                         be_entry_release_r( op, e );
1729                         op->o_private = o_priv;
1730                 }
1731                 if ( freeattr ) {
1732                         attr_free( a );
1733                 }
1734         }
1735
1736         op->o_bd = be;
1737         return rc;
1738 }
1739
1740 int
1741 backend_attribute(
1742         Operation *op,
1743         Entry   *target,
1744         struct berval   *edn,
1745         AttributeDescription *entry_at,
1746         BerVarray *vals,
1747         slap_access_t access )
1748 {
1749         int                     rc;
1750         BackendDB *be_orig;
1751         OpExtraDB       oex;
1752
1753         oex.oe_db = op->o_bd;
1754         oex.oe.oe_key = (void *)backend_attribute;
1755         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1756
1757         be_orig = op->o_bd;
1758         op->o_bd = frontendDB;
1759         rc = frontendDB->be_attribute( op, target, edn,
1760                 entry_at, vals, access );
1761         op->o_bd = be_orig;
1762         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1763
1764         return rc;
1765 }
1766
1767 int
1768 backend_access(
1769         Operation               *op,
1770         Entry                   *target,
1771         struct berval           *edn,
1772         AttributeDescription    *entry_at,
1773         struct berval           *nval,
1774         slap_access_t           access,
1775         slap_mask_t             *mask )
1776 {
1777         Entry           *e = NULL;
1778         void            *o_priv = op->o_private, *e_priv = NULL;
1779         int             rc = LDAP_INSUFFICIENT_ACCESS;
1780         Backend         *be = op->o_bd;
1781
1782         /* pedantic */
1783         assert( op != NULL );
1784         assert( op->o_conn != NULL );
1785         assert( edn != NULL );
1786         assert( access > ACL_NONE );
1787
1788         if ( !op->o_bd ) {
1789                 op->o_bd = select_backend( edn, 0 );
1790         }
1791
1792         if ( target && dn_match( &target->e_nname, edn ) ) {
1793                 e = target;
1794
1795         } else {
1796                 op->o_private = NULL;
1797                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1798                 e_priv = op->o_private;
1799                 op->o_private = o_priv;
1800         }
1801
1802         if ( e ) {
1803                 Attribute       *a = NULL;
1804                 int             freeattr = 0;
1805
1806                 if ( entry_at == NULL ) {
1807                         entry_at = slap_schema.si_ad_entry;
1808                 }
1809
1810                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1811                 {
1812                         if ( access_allowed_mask( op, e, entry_at,
1813                                         NULL, access, NULL, mask ) == 0 )
1814                         {
1815                                 rc = LDAP_INSUFFICIENT_ACCESS;
1816
1817                         } else {
1818                                 rc = LDAP_SUCCESS;
1819                         }
1820
1821                 } else {
1822                         a = attr_find( e->e_attrs, entry_at );
1823                         if ( a == NULL ) {
1824                                 SlapReply       rs = { 0 };
1825                                 AttributeName   anlist[ 2 ];
1826
1827                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1828                                 anlist[ 0 ].an_desc = entry_at;
1829                                 BER_BVZERO( &anlist[ 1 ].an_name );
1830                                 rs.sr_attrs = anlist;
1831
1832                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1833
1834                                 /* NOTE: backend_operational() is also called
1835                                  * when returning results, so it's supposed
1836                                  * to do no harm to entries */
1837                                 rs.sr_entry = e;
1838                                 rc = backend_operational( op, &rs );
1839                                 rs.sr_entry = NULL;
1840
1841                                 if ( rc == LDAP_SUCCESS ) {
1842                                         if ( rs.sr_operational_attrs ) {
1843                                                 freeattr = 1;
1844                                                 a = rs.sr_operational_attrs;
1845
1846                                         } else {
1847                                                 rc = LDAP_NO_SUCH_OBJECT;
1848                                         }
1849                                 }
1850                         }
1851
1852                         if ( a ) {
1853                                 if ( access_allowed_mask( op, e, entry_at,
1854                                                 nval, access, NULL, mask ) == 0 )
1855                                 {
1856                                         rc = LDAP_INSUFFICIENT_ACCESS;
1857                                         goto freeit;
1858                                 }
1859                                 rc = LDAP_SUCCESS;
1860                         }
1861                 }
1862 freeit:         if ( e != target ) {
1863                         op->o_private = e_priv;
1864                         be_entry_release_r( op, e );
1865                         op->o_private = o_priv;
1866                 }
1867                 if ( freeattr ) {
1868                         attr_free( a );
1869                 }
1870         }
1871
1872         op->o_bd = be;
1873         return rc;
1874 }
1875
1876 int
1877 fe_aux_operational(
1878         Operation *op,
1879         SlapReply *rs )
1880 {
1881         Attribute               **ap;
1882         int                     rc = LDAP_SUCCESS;
1883         BackendDB               *be_orig = op->o_bd;
1884         OpExtra         *oex;
1885
1886         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1887                 if ( oex->oe_key == (void *)backend_operational )
1888                         break;
1889         }
1890
1891         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1892                 /* just count them */ ;
1893
1894         /*
1895          * If operational attributes (allegedly) are required,
1896          * and the backend supports specific operational attributes,
1897          * add them to the attribute list
1898          */
1899         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1900                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1901                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1902         {
1903                 *ap = slap_operational_entryDN( rs->sr_entry );
1904                 ap = &(*ap)->a_next;
1905         }
1906
1907         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1908                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1909                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1910         {
1911                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1912                 ap = &(*ap)->a_next;
1913         }
1914
1915         /* Let the overlays have a chance at this */
1916         if ( oex && ((OpExtraDB *)oex)->oe_db )
1917                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1918
1919         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1920                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1921
1922         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1923                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1924                 op->o_bd->be_operational != NULL )
1925         {
1926                 rc = op->o_bd->be_operational( op, rs );
1927         }
1928         op->o_bd = be_orig;
1929
1930         return rc;
1931 }
1932
1933 int backend_operational( Operation *op, SlapReply *rs )
1934 {
1935         int rc;
1936         BackendDB *be_orig;
1937         OpExtraDB       oex;
1938
1939         oex.oe_db = op->o_bd;
1940         oex.oe.oe_key = (void *)backend_operational;
1941         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1942
1943         /* Moved this into the frontend so global overlays are called */
1944
1945         be_orig = op->o_bd;
1946         op->o_bd = frontendDB;
1947         rc = frontendDB->be_operational( op, rs );
1948         op->o_bd = be_orig;
1949         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1950
1951         return rc;
1952 }
1953