git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "config.h"
  38 #include "lutil.h"
  39 #include "lber_pvt.h"
  40
  41 /*
  42  * If a module is configured as dynamic, its header should not
  43  * get included into slapd. While this is a general rule and does
  44  * not have much of an effect in UNIX, this rule should be adhered
  45  * to for Windows, where dynamic object code should not be implicitly
  46  * imported into slapd without appropriate __declspec(dllimport) directives.
  47  */
  48
  49 int                     nBackendInfo = 0;
  50 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  51
  52 int                     nBackendDB = 0;
  53 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  54
  55 static int
  56 backend_init_controls( BackendInfo *bi )
  57 {
  58         if ( bi->bi_controls ) {
  59                 int     i;
  60
  61                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  62                         int     cid;
  63
  64                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  65                                         == LDAP_CONTROL_NOT_FOUND )
  66                         {
  67                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  68                                         assert( 0 );
  69                                 }
  70
  71                                 return -1;
  72                         }
  73
  74                         bi->bi_ctrls[ cid ] = 1;
  75                 }
  76         }
  77
  78         return 0;
  79 }
  80
  81 int backend_init(void)
  82 {
  83         int rc = -1;
  84         BackendInfo *bi;
  85
  86         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  87                 /* already initialized */
  88                 Debug( LDAP_DEBUG_ANY,
  89                         "backend_init: already initialized\n", 0, 0, 0 );
  90                 return -1;
  91         }
  92
  93         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  94                 assert( bi->bi_init != 0 );
  95
  96                 rc = bi->bi_init( bi );
  97
  98                 if(rc != 0) {
  99                         Debug( LDAP_DEBUG_ANY,
 100                                 "backend_init: initialized for type \"%s\"\n",
 101                                 bi->bi_type, 0, 0 );
 102                         /* destroy those we've already inited */
 103                         for( nBackendInfo--;
 104                                 nBackendInfo >= 0 ;
 105                                 nBackendInfo-- )
 106                         {
 107                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 108                                         slap_binfo[nBackendInfo].bi_destroy(
 109                                                 &slap_binfo[nBackendInfo] );
 110                                 }
 111                         }
 112                         return rc;
 113                 }
 114
 115                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 116         }
 117
 118         if ( nBackendInfo > 0) {
 119                 return 0;
 120         }
 121
 122 #ifdef SLAPD_MODULES
 123         return 0;
 124 #else
 125
 126         Debug( LDAP_DEBUG_ANY,
 127                 "backend_init: failed\n",
 128                 0, 0, 0 );
 129
 130         return rc;
 131 #endif /* SLAPD_MODULES */
 132 }
 133
 134 int backend_add(BackendInfo *aBackendInfo)
 135 {
 136         int rc = 0;
 137
 138         if ( aBackendInfo->bi_init == NULL ) {
 139                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 140                         "backend type \"%s\" does not have the (mandatory)init function\n",
 141                         aBackendInfo->bi_type, 0, 0 );
 142                 return -1;
 143         }
 144
 145         rc = aBackendInfo->bi_init(aBackendInfo);
 146         if ( rc != 0) {
 147                 Debug( LDAP_DEBUG_ANY,
 148                         "backend_add:  initialization for type \"%s\" failed\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return rc;
 151         }
 152
 153         (void)backend_init_controls( aBackendInfo );
 154
 155         /* now add the backend type to the Backend Info List */
 156         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 157         nBackendInfo++;
 158         return 0;
 159 }
 160
 161 static int
 162 backend_set_controls( BackendDB *be )
 163 {
 164         BackendInfo     *bi = be->bd_info;
 165
 166         /* back-relay takes care of itself; so may do other */
 167         if ( overlay_is_over( be ) ) {
 168                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 169         }
 170
 171         if ( bi->bi_controls ) {
 172                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 173                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 174                                         sizeof( be->be_ctrls ) );
 175                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 176
 177                 } else {
 178                         int     i;
 179
 180                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 181                                 if ( bi->bi_ctrls[ i ] ) {
 182                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 183                                 }
 184                         }
 185                 }
 186
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* startup a specific backend database */
 193 int backend_startup_one(Backend *be, ConfigReply *cr)
 194 {
 195         int             rc = 0;
 196
 197         assert( be != NULL );
 198
 199         be->be_pending_csn_list = (struct be_pcl *)
 200                 ch_calloc( 1, sizeof( struct be_pcl ) );
 201
 202         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 203
 204         Debug( LDAP_DEBUG_TRACE,
 205                 "backend_startup_one: starting \"%s\"\n",
 206                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 207                 0, 0 );
 208
 209         /* set database controls */
 210         (void)backend_set_controls( be );
 211
 212 #if 0
 213         if ( !BER_BVISEMPTY( &be->be_rootndn )
 214                 && select_backend( &be->be_rootndn, 0 ) == be
 215                 && BER_BVISNULL( &be->be_rootpw ) )
 216         {
 217                 /* warning: if rootdn entry is created,
 218                  * it can take rootdn privileges;
 219                  * set empty rootpw to prevent */
 220         }
 221 #endif
 222
 223         if ( be->bd_info->bi_db_open ) {
 224                 rc = be->bd_info->bi_db_open( be, cr );
 225                 if ( rc == 0 ) {
 226                         (void)backend_set_controls( be );
 227
 228                 } else {
 229                         Debug( LDAP_DEBUG_ANY,
 230                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 231                                 rc, 0, 0 );
 232                 }
 233         }
 234
 235         return rc;
 236 }
 237
 238 int backend_startup(Backend *be)
 239 {
 240         int i;
 241         int rc = 0;
 242         BackendInfo *bi;
 243         ConfigReply cr={0, ""};
 244
 245         if( ! ( nBackendDB > 0 ) ) {
 246                 /* no databases */
 247                 Debug( LDAP_DEBUG_ANY,
 248                         "backend_startup: %d databases to startup.\n",
 249                         nBackendDB, 0, 0 );
 250                 return 1;
 251         }
 252
 253         if(be != NULL) {
 254                 if ( be->bd_info->bi_open ) {
 255                         rc = be->bd_info->bi_open( be->bd_info );
 256                         if ( rc != 0 ) {
 257                                 Debug( LDAP_DEBUG_ANY,
 258                                         "backend_startup: bi_open failed!\n",
 259                                         0, 0, 0 );
 260
 261                                 return rc;
 262                         }
 263                 }
 264
 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                 bi->bi_nDB++;
 616         }
 617         return( be );
 618 }
 619
 620 void
 621 be_db_close( void )
 622 {
 623         BackendDB *be;
 624
 625         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 626                 if ( be->bd_info->bi_db_close ) {
 627                         be->bd_info->bi_db_close( be, NULL );
 628                 }
 629         }
 630
 631         if ( frontendDB->bd_info->bi_db_close ) {
 632                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 633         }
 634
 635 }
 636
 637 Backend *
 638 select_backend(
 639         struct berval * dn,
 640         int noSubs )
 641 {
 642         int             j;
 643         ber_len_t       len, dnlen = dn->bv_len;
 644         Backend         *be;
 645
 646         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 647                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 648                         continue;
 649                 }
 650
 651                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 652                 {
 653                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 654                         {
 655                                 continue;
 656                         }
 657
 658                         len = be->be_nsuffix[j].bv_len;
 659
 660                         if ( len > dnlen ) {
 661                                 /* suffix is longer than DN */
 662                                 continue;
 663                         }
 664
 665                         /*
 666                          * input DN is normalized, so the separator check
 667                          * need not look at escaping
 668                          */
 669                         if ( len && len < dnlen &&
 670                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 671                         {
 672                                 continue;
 673                         }
 674
 675                         if ( strcmp( be->be_nsuffix[j].bv_val,
 676                                 &dn->bv_val[dnlen-len] ) == 0 )
 677                         {
 678                                 return be;
 679                         }
 680                 }
 681         }
 682
 683         return be;
 684 }
 685
 686 int
 687 be_issuffix(
 688     Backend *be,
 689     struct berval *bvsuffix )
 690 {
 691         int     i;
 692
 693         if ( be->be_nsuffix == NULL ) {
 694                 return 0;
 695         }
 696
 697         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 698                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 699                         return 1;
 700                 }
 701         }
 702
 703         return 0;
 704 }
 705
 706 int
 707 be_issubordinate(
 708     Backend *be,
 709     struct berval *bvsubordinate )
 710 {
 711         int     i;
 712
 713         if ( be->be_nsuffix == NULL ) {
 714                 return 0;
 715         }
 716
 717         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 718                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 719                         return 1;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 int
 727 be_isroot_dn( Backend *be, struct berval *ndn )
 728 {
 729         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 730                 return 0;
 731         }
 732
 733         return dn_match( &be->be_rootndn, ndn );
 734 }
 735
 736 int
 737 be_slurp_update( Operation *op )
 738 {
 739         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 740                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 741 }
 742
 743 int
 744 be_shadow_update( Operation *op )
 745 {
 746         /* This assumes that all internal ops (connid == -1) on a syncrepl
 747          * database are syncrepl operations.
 748          */
 749         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 750                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 751 }
 752
 753 int
 754 be_isupdate_dn( Backend *be, struct berval *ndn )
 755 {
 756         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 757                 return 0;
 758         }
 759
 760         return dn_match( &be->be_update_ndn, ndn );
 761 }
 762
 763 struct berval *
 764 be_root_dn( Backend *be )
 765 {
 766         return &be->be_rootdn;
 767 }
 768
 769 int
 770 be_isroot( Operation *op )
 771 {
 772         return be_isroot_dn( op->o_bd, &op->o_ndn );
 773 }
 774
 775 int
 776 be_isroot_pw( Operation *op )
 777 {
 778         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 779 }
 780
 781 /*
 782  * checks if binding as rootdn
 783  *
 784  * return value:
 785  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 786  *      LDAP_SUCCESS                    if rootdn & rootpw
 787  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 788  *
 789  * if rs != NULL
 790  *      if LDAP_SUCCESS, op->orb_edn is set
 791  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 792  */
 793 int
 794 be_rootdn_bind( Operation *op, SlapReply *rs )
 795 {
 796         int             rc;
 797 #ifdef SLAPD_SPASSWD
 798         void    *old_authctx = NULL;
 799 #endif
 800
 801         assert( op->o_tag == LDAP_REQ_BIND );
 802         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 803
 804         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 805                 return SLAP_CB_CONTINUE;
 806         }
 807
 808         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 809                 /* give the database a chance */
 810                 return SLAP_CB_CONTINUE;
 811         }
 812
 813         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 814                 /* rootdn bind explicitly disallowed */
 815                 rc = LDAP_INVALID_CREDENTIALS;
 816                 if ( rs ) {
 817                         goto send_result;
 818                 }
 819
 820                 return rc;
 821         }
 822
 823 #ifdef SLAPD_SPASSWD
 824         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 825                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 826 #endif
 827
 828         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 829
 830 #ifdef SLAPD_SPASSWD
 831         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 832                 old_authctx, 0, NULL, NULL );
 833 #endif
 834
 835         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 836         if ( rs ) {
 837 send_result:;
 838                 rs->sr_err = rc;
 839
 840                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 841                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 842                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 843
 844                 if ( rc == LDAP_SUCCESS ) {
 845                         /* Set to the pretty rootdn */
 846                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 847
 848                 } else {
 849                         send_ldap_result( op, rs );
 850                 }
 851         }
 852
 853         return rc;
 854 }
 855
 856 int
 857 be_entry_release_rw(
 858         Operation *op,
 859         Entry *e,
 860         int rw )
 861 {
 862         if ( op->o_bd->be_release ) {
 863                 /* free and release entry from backend */
 864                 return op->o_bd->be_release( op, e, rw );
 865         } else {
 866                 /* free entry */
 867                 entry_free( e );
 868                 return 0;
 869         }
 870 }
 871
 872 int
 873 backend_unbind( Operation *op, SlapReply *rs )
 874 {
 875         BackendDB *be;
 876
 877         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 878                 if ( be->be_unbind ) {
 879                         op->o_bd = be;
 880                         be->be_unbind( op, rs );
 881                 }
 882         }
 883
 884         return 0;
 885 }
 886
 887 int
 888 backend_connection_init(
 889         Connection   *conn )
 890 {
 891         BackendDB *be;
 892
 893         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 894                 if ( be->be_connection_init ) {
 895                         be->be_connection_init( be, conn );
 896                 }
 897         }
 898
 899         return 0;
 900 }
 901
 902 int
 903 backend_connection_destroy(
 904         Connection   *conn )
 905 {
 906         BackendDB *be;
 907
 908         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 909                 if ( be->be_connection_destroy ) {
 910                         be->be_connection_destroy( be, conn);
 911                 }
 912         }
 913
 914         return 0;
 915 }
 916
 917 int
 918 backend_check_controls(
 919         Operation *op,
 920         SlapReply *rs )
 921 {
 922         LDAPControl **ctrls = op->o_ctrls;
 923         rs->sr_err = LDAP_SUCCESS;
 924
 925         if( ctrls ) {
 926                 for( ; *ctrls != NULL ; ctrls++ ) {
 927                         int cid;
 928
 929                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 930                         case LDAP_CONTROL_NOT_FOUND:
 931                                 /* unrecognized control */
 932                                 if ( (*ctrls)->ldctl_iscritical ) {
 933                                         /* should not be reachable */
 934                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 935                                                 "unrecognized critical control: %s\n",
 936                                                 (*ctrls)->ldctl_oid, 0, 0 );
 937                                         assert( 0 );
 938                                 } else {
 939                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 940                                                 "unrecognized non-critical control: %s\n",
 941                                                 (*ctrls)->ldctl_oid, 0, 0 );
 942                                 }
 943                                 break;
 944
 945                         case LDAP_COMPARE_FALSE:
 946                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 947 #ifdef SLAP_CONTROL_X_WHATFAILED
 948                                         if ( get_whatFailed( op ) ) {
 949                                                 char *oids[ 2 ];
 950                                                 oids[ 0 ] = (*ctrls)->ldctl_oid;
 951                                                 oids[ 1 ] = NULL;
 952                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 953                                         }
 954 #endif
 955                                         /* RFC 4511 allows unavailableCriticalExtension to be
 956                                          * returned when the server is unwilling to perform
 957                                          * an operation extended by a recognized critical
 958                                          * control.
 959                                          */
 960                                         rs->sr_text = "critical control unavailable in context";
 961                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 962                                         goto done;
 963                                 }
 964                                 break;
 965
 966                         case LDAP_COMPARE_TRUE:
 967                                 break;
 968
 969                         default:
 970                                 /* unreachable */
 971                                 Debug( LDAP_DEBUG_ANY,
 972                                         "backend_check_controls: unable to check control: %s\n",
 973                                         (*ctrls)->ldctl_oid, 0, 0 );
 974                                 assert( 0 );
 975
 976                                 rs->sr_text = "unable to check control";
 977                                 rs->sr_err = LDAP_OTHER;
 978                                 goto done;
 979                         }
 980                 }
 981         }
 982
 983 #if 0 /* temporarily removed */
 984         /* check should be generalized */
 985         if( get_relax(op) && !be_isroot(op)) {
 986                 rs->sr_text = "requires manager authorization";
 987                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 988         }
 989 #endif
 990
 991 done:;
 992         return rs->sr_err;
 993 }
 994
 995 int
 996 backend_check_restrictions(
 997         Operation *op,
 998         SlapReply *rs,
 999         struct berval *opdata )
1000 {
1001         slap_mask_t restrictops;
1002         slap_mask_t requires;
1003         slap_mask_t opflag;
1004         slap_mask_t exopflag = 0;
1005         slap_ssf_set_t *ssf;
1006         int updateop = 0;
1007         int starttls = 0;
1008         int session = 0;
1009
1010         if ( op->o_bd ) {
1011                 int     rc = SLAP_CB_CONTINUE;
1012
1013                 if ( op->o_bd->be_chk_controls ) {
1014                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1015                 }
1016
1017                 if ( rc == SLAP_CB_CONTINUE ) {
1018                         rc = backend_check_controls( op, rs );
1019                 }
1020
1021                 if ( rc != LDAP_SUCCESS ) {
1022                         return rs->sr_err;
1023                 }
1024
1025                 restrictops = op->o_bd->be_restrictops;
1026                 requires = op->o_bd->be_requires;
1027                 ssf = &op->o_bd->be_ssf_set;
1028
1029         } else {
1030                 restrictops = frontendDB->be_restrictops;
1031                 requires = frontendDB->be_requires;
1032                 ssf = &frontendDB->be_ssf_set;
1033         }
1034
1035         switch( op->o_tag ) {
1036         case LDAP_REQ_ADD:
1037                 opflag = SLAP_RESTRICT_OP_ADD;
1038                 updateop++;
1039                 break;
1040         case LDAP_REQ_BIND:
1041                 opflag = SLAP_RESTRICT_OP_BIND;
1042                 session++;
1043                 break;
1044         case LDAP_REQ_COMPARE:
1045                 opflag = SLAP_RESTRICT_OP_COMPARE;
1046                 break;
1047         case LDAP_REQ_DELETE:
1048                 updateop++;
1049                 opflag = SLAP_RESTRICT_OP_DELETE;
1050                 break;
1051         case LDAP_REQ_EXTENDED:
1052                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1053
1054                 if( !opdata ) {
1055                         /* treat unspecified as a modify */
1056                         opflag = SLAP_RESTRICT_OP_MODIFY;
1057                         updateop++;
1058                         break;
1059                 }
1060
1061                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1062                         session++;
1063                         starttls++;
1064                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1065                         break;
1066                 }
1067
1068                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1069                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1070                         break;
1071                 }
1072
1073                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1074                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1075                         break;
1076                 }
1077
1078                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1079                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1080                         updateop++;
1081                         break;
1082                 }
1083
1084                 /* treat everything else as a modify */
1085                 opflag = SLAP_RESTRICT_OP_MODIFY;
1086                 updateop++;
1087                 break;
1088
1089         case LDAP_REQ_MODIFY:
1090                 updateop++;
1091                 opflag = SLAP_RESTRICT_OP_MODIFY;
1092                 break;
1093         case LDAP_REQ_RENAME:
1094                 updateop++;
1095                 opflag = SLAP_RESTRICT_OP_RENAME;
1096                 break;
1097         case LDAP_REQ_SEARCH:
1098                 opflag = SLAP_RESTRICT_OP_SEARCH;
1099                 break;
1100         case LDAP_REQ_UNBIND:
1101                 session++;
1102                 opflag = 0;
1103                 break;
1104         default:
1105                 rs->sr_text = "restrict operations internal error";
1106                 rs->sr_err = LDAP_OTHER;
1107                 return rs->sr_err;
1108         }
1109
1110         if ( !starttls ) {
1111                 /* these checks don't apply to StartTLS */
1112
1113                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1114                 if( op->o_transport_ssf < ssf->sss_transport ) {
1115                         rs->sr_text = op->o_transport_ssf
1116                                 ? "stronger transport confidentiality required"
1117                                 : "transport confidentiality required";
1118                         return rs->sr_err;
1119                 }
1120
1121                 if( op->o_tls_ssf < ssf->sss_tls ) {
1122                         rs->sr_text = op->o_tls_ssf
1123                                 ? "stronger TLS confidentiality required"
1124                                 : "TLS confidentiality required";
1125                         return rs->sr_err;
1126                 }
1127
1128
1129                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1130                         /* simple bind specific check */
1131                         if( op->o_ssf < ssf->sss_simple_bind ) {
1132                                 rs->sr_text = op->o_ssf
1133                                         ? "stronger confidentiality required"
1134                                         : "confidentiality required";
1135                                 return rs->sr_err;
1136                         }
1137                 }
1138
1139                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1140                         /* these checks don't apply to SASL bind */
1141
1142                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1143                                 rs->sr_text = op->o_sasl_ssf
1144                                         ? "stronger SASL confidentiality required"
1145                                         : "SASL confidentiality required";
1146                                 return rs->sr_err;
1147                         }
1148
1149                         if( op->o_ssf < ssf->sss_ssf ) {
1150                                 rs->sr_text = op->o_ssf
1151                                         ? "stronger confidentiality required"
1152                                         : "confidentiality required";
1153                                 return rs->sr_err;
1154                         }
1155                 }
1156
1157                 if( updateop ) {
1158                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1159                                 rs->sr_text = op->o_transport_ssf
1160                                         ? "stronger transport confidentiality required for update"
1161                                         : "transport confidentiality required for update";
1162                                 return rs->sr_err;
1163                         }
1164
1165                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1166                                 rs->sr_text = op->o_tls_ssf
1167                                         ? "stronger TLS confidentiality required for update"
1168                                         : "TLS confidentiality required for update";
1169                                 return rs->sr_err;
1170                         }
1171
1172                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1173                                 rs->sr_text = op->o_sasl_ssf
1174                                         ? "stronger SASL confidentiality required for update"
1175                                         : "SASL confidentiality required for update";
1176                                 return rs->sr_err;
1177                         }
1178
1179                         if( op->o_ssf < ssf->sss_update_ssf ) {
1180                                 rs->sr_text = op->o_ssf
1181                                         ? "stronger confidentiality required for update"
1182                                         : "confidentiality required for update";
1183                                 return rs->sr_err;
1184                         }
1185
1186                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1187                                 BER_BVISEMPTY( &op->o_ndn ) )
1188                         {
1189                                 rs->sr_text = "modifications require authentication";
1190                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1191                                 return rs->sr_err;
1192                         }
1193
1194 #ifdef SLAP_X_LISTENER_MOD
1195                         if ( op->o_conn->c_listener &&
1196                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1197                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1198                         {
1199                                 /* no "w" mode means readonly */
1200                                 rs->sr_text = "modifications not allowed on this listener";
1201                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1202                                 return rs->sr_err;
1203                         }
1204 #endif /* SLAP_X_LISTENER_MOD */
1205                 }
1206         }
1207
1208         if ( !session ) {
1209                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1210
1211                 if( requires & SLAP_REQUIRE_STRONG ) {
1212                         /* should check mechanism */
1213                         if( ( op->o_transport_ssf < ssf->sss_transport
1214                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1215                                 || BER_BVISEMPTY( &op->o_dn ) )
1216                         {
1217                                 rs->sr_text = "strong(er) authentication required";
1218                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1219                                 return rs->sr_err;
1220                         }
1221                 }
1222
1223                 if( requires & SLAP_REQUIRE_SASL ) {
1224                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1225                                 rs->sr_text = "SASL authentication required";
1226                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1227                                 return rs->sr_err;
1228                         }
1229                 }
1230
1231                 if( requires & SLAP_REQUIRE_AUTHC ) {
1232                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1233                                 rs->sr_text = "authentication required";
1234                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1235                                 return rs->sr_err;
1236                         }
1237                 }
1238
1239                 if( requires & SLAP_REQUIRE_BIND ) {
1240                         int version;
1241                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1242                         version = op->o_conn->c_protocol;
1243                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1244
1245                         if( !version ) {
1246                                 /* no bind has occurred */
1247                                 rs->sr_text = "BIND required";
1248                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1249                                 return rs->sr_err;
1250                         }
1251                 }
1252
1253                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1254                         if( op->o_protocol < LDAP_VERSION3 ) {
1255                                 /* no bind has occurred */
1256                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1257                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1258                                 return rs->sr_err;
1259                         }
1260                 }
1261
1262 #ifdef SLAP_X_LISTENER_MOD
1263                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1264                         if ( op->o_conn->c_listener &&
1265                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1266                 {
1267                                 /* no "x" mode means bind required */
1268                                 rs->sr_text = "bind required on this listener";
1269                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1270                                 return rs->sr_err;
1271                         }
1272                 }
1273
1274                 if ( !starttls && !updateop ) {
1275                         if ( op->o_conn->c_listener &&
1276                                 !( op->o_conn->c_listener->sl_perms &
1277                                         ( !BER_BVISEMPTY( &op->o_dn )
1278                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1279                         {
1280                                 /* no "r" mode means no read */
1281                                 rs->sr_text = "read not allowed on this listener";
1282                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1283                                 return rs->sr_err;
1284                         }
1285                 }
1286 #endif /* SLAP_X_LISTENER_MOD */
1287
1288         }
1289
1290         if( ( restrictops & opflag )
1291                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1292                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1293                         rs->sr_text = "read operations restricted";
1294                 } else if ( restrictops & exopflag ) {
1295                         rs->sr_text = "extended operation restricted";
1296                 } else {
1297                         rs->sr_text = "operation restricted";
1298                 }
1299                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1300                 return rs->sr_err;
1301         }
1302
1303         rs->sr_err = LDAP_SUCCESS;
1304         return rs->sr_err;
1305 }
1306
1307 int backend_check_referrals( Operation *op, SlapReply *rs )
1308 {
1309         rs->sr_err = LDAP_SUCCESS;
1310
1311         if( op->o_bd->be_chk_referrals ) {
1312                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1313
1314                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1315                         send_ldap_result( op, rs );
1316                 }
1317         }
1318
1319         return rs->sr_err;
1320 }
1321
1322 int
1323 be_entry_get_rw(
1324         Operation *op,
1325         struct berval *ndn,
1326         ObjectClass *oc,
1327         AttributeDescription *at,
1328         int rw,
1329         Entry **e )
1330 {
1331         *e = NULL;
1332
1333         if ( op->o_bd == NULL ) {
1334                 return LDAP_NO_SUCH_OBJECT;
1335         }
1336
1337         if ( op->o_bd->be_fetch ) {
1338                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1339         }
1340
1341         return LDAP_UNWILLING_TO_PERFORM;
1342 }
1343
1344 int
1345 fe_acl_group(
1346         Operation *op,
1347         Entry   *target,
1348         struct berval *gr_ndn,
1349         struct berval *op_ndn,
1350         ObjectClass *group_oc,
1351         AttributeDescription *group_at )
1352 {
1353         Entry *e;
1354         void *o_priv = op->o_private, *e_priv = NULL;
1355         Attribute *a;
1356         int rc;
1357         GroupAssertion *g;
1358         Backend *be = op->o_bd;
1359         OpExtra         *oex;
1360
1361         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1362                 if ( oex->oe_key == (void *)backend_group )
1363                         break;
1364         }
1365
1366         if ( oex && ((OpExtraDB *)oex)->oe_db )
1367                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1368
1369         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1370                 op->o_bd = select_backend( gr_ndn, 0 );
1371
1372         for ( g = op->o_groups; g; g = g->ga_next ) {
1373                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1374                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1375                 {
1376                         continue;
1377                 }
1378                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1379                         break;
1380                 }
1381         }
1382
1383         if ( g ) {
1384                 rc = g->ga_res;
1385                 goto done;
1386         }
1387
1388         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1389                 e = target;
1390                 rc = 0;
1391
1392         } else {
1393                 op->o_private = NULL;
1394                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1395                 e_priv = op->o_private;
1396                 op->o_private = o_priv;
1397         }
1398
1399         if ( e ) {
1400                 a = attr_find( e->e_attrs, group_at );
1401                 if ( a ) {
1402                         /* If the attribute is a subtype of labeledURI,
1403                          * treat this as a dynamic group ala groupOfURLs
1404                          */
1405                         if ( is_at_subtype( group_at->ad_type,
1406                                 slap_schema.si_ad_labeledURI->ad_type ) )
1407                         {
1408                                 int i;
1409                                 LDAPURLDesc *ludp;
1410                                 struct berval bv, nbase;
1411                                 Filter *filter;
1412                                 Entry *user = NULL;
1413                                 void *user_priv = NULL;
1414                                 Backend *b2 = op->o_bd;
1415
1416                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1417                                         user = target;
1418                                 }
1419
1420                                 rc = LDAP_COMPARE_FALSE;
1421                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1422                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1423                                                 LDAP_URL_SUCCESS )
1424                                         {
1425                                                 continue;
1426                                         }
1427
1428                                         BER_BVZERO( &nbase );
1429
1430                                         /* host, attrs and extensions parts must be empty */
1431                                         if ( ( ludp->lud_host && *ludp->lud_host )
1432                                                 || ludp->lud_attrs
1433                                                 || ludp->lud_exts )
1434                                         {
1435                                                 goto loopit;
1436                                         }
1437
1438                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1439                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1440                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1441                                         {
1442                                                 goto loopit;
1443                                         }
1444
1445                                         switch ( ludp->lud_scope ) {
1446                                         case LDAP_SCOPE_BASE:
1447                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1448                                                         goto loopit;
1449                                                 }
1450                                                 break;
1451                                         case LDAP_SCOPE_ONELEVEL:
1452                                                 dnParent( op_ndn, &bv );
1453                                                 if ( !dn_match( &nbase, &bv ) ) {
1454                                                         goto loopit;
1455                                                 }
1456                                                 break;
1457                                         case LDAP_SCOPE_SUBTREE:
1458                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1459                                                         goto loopit;
1460                                                 }
1461                                                 break;
1462                                         case LDAP_SCOPE_SUBORDINATE:
1463                                                 if ( dn_match( &nbase, op_ndn ) ||
1464                                                         !dnIsSuffix( op_ndn, &nbase ) )
1465                                                 {
1466                                                         goto loopit;
1467                                                 }
1468                                         }
1469
1470                                         /* NOTE: this could be NULL
1471                                          * if no filter is provided,
1472                                          * or if filter parsing fails.
1473                                          * In the latter case,
1474                                          * we should give up. */
1475                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1476                                                 filter = str2filter_x( op, ludp->lud_filter );
1477                                                 if ( filter == NULL ) {
1478                                                         /* give up... */
1479                                                         rc = LDAP_OTHER;
1480                                                         goto loopit;
1481                                                 }
1482
1483                                                 /* only get user if required
1484                                                  * and not available yet */
1485                                                 if ( user == NULL ) {
1486                                                         int rc2;
1487
1488                                                         op->o_bd = select_backend( op_ndn, 0 );
1489                                                         op->o_private = NULL;
1490                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1491                                                         user_priv = op->o_private;
1492                                                         op->o_private = o_priv;
1493                                                         if ( rc2 != 0 ) {
1494                                                                 /* give up... */
1495                                                                 rc = LDAP_OTHER;
1496                                                                 goto loopit;
1497                                                         }
1498                                                 }
1499
1500                                                 if ( test_filter( NULL, user, filter ) ==
1501                                                         LDAP_COMPARE_TRUE )
1502                                                 {
1503                                                         rc = 0;
1504                                                 }
1505                                                 filter_free_x( op, filter, 1 );
1506                                         }
1507 loopit:
1508                                         ldap_free_urldesc( ludp );
1509                                         if ( !BER_BVISNULL( &nbase ) ) {
1510                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1511                                         }
1512                                         if ( rc != LDAP_COMPARE_FALSE ) {
1513                                                 break;
1514                                         }
1515                                 }
1516
1517                                 if ( user != NULL && user != target ) {
1518                                         op->o_private = user_priv;
1519                                         be_entry_release_r( op, user );
1520                                         op->o_private = o_priv;
1521                                 }
1522                                 op->o_bd = b2;
1523
1524                         } else {
1525                                 rc = attr_valfind( a,
1526                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1527                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1528                                         op_ndn, NULL, op->o_tmpmemctx );
1529                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1530                                         rc = LDAP_COMPARE_FALSE;
1531                                 }
1532                         }
1533
1534                 } else {
1535                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1536                 }
1537
1538                 if ( e != target ) {
1539                         op->o_private = e_priv;
1540                         be_entry_release_r( op, e );
1541                         op->o_private = o_priv;
1542                 }
1543
1544         } else {
1545                 rc = LDAP_NO_SUCH_OBJECT;
1546         }
1547
1548         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1549                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1550                         op->o_tmpmemctx );
1551                 g->ga_be = op->o_bd;
1552                 g->ga_oc = group_oc;
1553                 g->ga_at = group_at;
1554                 g->ga_res = rc;
1555                 g->ga_len = gr_ndn->bv_len;
1556                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1557                 g->ga_next = op->o_groups;
1558                 op->o_groups = g;
1559         }
1560
1561 done:
1562         op->o_bd = be;
1563         return rc;
1564 }
1565
1566 int
1567 backend_group(
1568         Operation *op,
1569         Entry   *target,
1570         struct berval *gr_ndn,
1571         struct berval *op_ndn,
1572         ObjectClass *group_oc,
1573         AttributeDescription *group_at )
1574 {
1575         int                     rc;
1576         BackendDB *be_orig;
1577         OpExtraDB       oex;
1578
1579         if ( op->o_abandon ) {
1580                 return SLAPD_ABANDON;
1581         }
1582
1583         oex.oe_db = op->o_bd;
1584         oex.oe.oe_key = (void *)backend_group;
1585         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1586
1587         be_orig = op->o_bd;
1588         op->o_bd = frontendDB;
1589         rc = frontendDB->be_group( op, target, gr_ndn,
1590                 op_ndn, group_oc, group_at );
1591         op->o_bd = be_orig;
1592         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1593
1594         return rc;
1595 }
1596
1597 int
1598 fe_acl_attribute(
1599         Operation *op,
1600         Entry   *target,
1601         struct berval   *edn,
1602         AttributeDescription *entry_at,
1603         BerVarray *vals,
1604         slap_access_t access )
1605 {
1606         Entry                   *e = NULL;
1607         void                    *o_priv = op->o_private, *e_priv = NULL;
1608         Attribute               *a = NULL;
1609         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1610         AccessControlState      acl_state = ACL_STATE_INIT;
1611         Backend                 *be = op->o_bd;
1612         OpExtra         *oex;
1613
1614         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1615                 if ( oex->oe_key == (void *)backend_attribute )
1616                         break;
1617         }
1618
1619         if ( oex && ((OpExtraDB *)oex)->oe_db )
1620                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1621
1622         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1623                 op->o_bd = select_backend( edn, 0 );
1624
1625         if ( target && dn_match( &target->e_nname, edn ) ) {
1626                 e = target;
1627
1628         } else {
1629                 op->o_private = NULL;
1630                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1631                 e_priv = op->o_private;
1632                 op->o_private = o_priv;
1633         }
1634
1635         if ( e ) {
1636                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1637                         assert( vals == NULL );
1638
1639                         rc = LDAP_SUCCESS;
1640                         if ( op->o_conn && access > ACL_NONE &&
1641                                 access_allowed( op, e, entry_at, NULL,
1642                                                 access, &acl_state ) == 0 )
1643                         {
1644                                 rc = LDAP_INSUFFICIENT_ACCESS;
1645                         }
1646                         goto freeit;
1647                 }
1648
1649                 a = attr_find( e->e_attrs, entry_at );
1650                 if ( a == NULL ) {
1651                         SlapReply       rs = { 0 };
1652                         AttributeName   anlist[ 2 ];
1653
1654                         anlist[ 0 ].an_name = entry_at->ad_cname;
1655                         anlist[ 0 ].an_desc = entry_at;
1656                         BER_BVZERO( &anlist[ 1 ].an_name );
1657                         rs.sr_attrs = anlist;
1658
1659                         /* NOTE: backend_operational() is also called
1660                          * when returning results, so it's supposed
1661                          * to do no harm to entries */
1662                         rs.sr_entry = e;
1663                         rc = backend_operational( op, &rs );
1664                         rs.sr_entry = NULL;
1665
1666                         if ( rc == LDAP_SUCCESS ) {
1667                                 if ( rs.sr_operational_attrs ) {
1668                                         freeattr = 1;
1669                                         a = rs.sr_operational_attrs;
1670
1671                                 } else {
1672                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1673                                 }
1674                         }
1675                 }
1676
1677                 if ( a ) {
1678                         BerVarray v;
1679
1680                         if ( op->o_conn && access > ACL_NONE &&
1681                                 access_allowed( op, e, entry_at, NULL,
1682                                                 access, &acl_state ) == 0 )
1683                         {
1684                                 rc = LDAP_INSUFFICIENT_ACCESS;
1685                                 goto freeit;
1686                         }
1687
1688                         i = a->a_numvals;
1689                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1690                                 op->o_tmpmemctx );
1691                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1692                         {
1693                                 if ( op->o_conn && access > ACL_NONE &&
1694                                         access_allowed( op, e, entry_at,
1695                                                         &a->a_nvals[i],
1696                                                         access,
1697                                                         &acl_state ) == 0 )
1698                                 {
1699                                         continue;
1700                                 }
1701                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1702                                                 op->o_tmpmemctx );
1703                                 if ( !BER_BVISNULL( &v[j] ) ) {
1704                                         j++;
1705                                 }
1706                         }
1707                         if ( j == 0 ) {
1708                                 op->o_tmpfree( v, op->o_tmpmemctx );
1709                                 *vals = NULL;
1710                                 rc = LDAP_INSUFFICIENT_ACCESS;
1711
1712                         } else {
1713                                 BER_BVZERO( &v[j] );
1714                                 *vals = v;
1715                                 rc = LDAP_SUCCESS;
1716                         }
1717                 }
1718 freeit:         if ( e != target ) {
1719                         op->o_private = e_priv;
1720                         be_entry_release_r( op, e );
1721                         op->o_private = o_priv;
1722                 }
1723                 if ( freeattr ) {
1724                         attr_free( a );
1725                 }
1726         }
1727
1728         op->o_bd = be;
1729         return rc;
1730 }
1731
1732 int
1733 backend_attribute(
1734         Operation *op,
1735         Entry   *target,
1736         struct berval   *edn,
1737         AttributeDescription *entry_at,
1738         BerVarray *vals,
1739         slap_access_t access )
1740 {
1741         int                     rc;
1742         BackendDB *be_orig;
1743         OpExtraDB       oex;
1744
1745         oex.oe_db = op->o_bd;
1746         oex.oe.oe_key = (void *)backend_attribute;
1747         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1748
1749         be_orig = op->o_bd;
1750         op->o_bd = frontendDB;
1751         rc = frontendDB->be_attribute( op, target, edn,
1752                 entry_at, vals, access );
1753         op->o_bd = be_orig;
1754         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1755
1756         return rc;
1757 }
1758
1759 int
1760 backend_access(
1761         Operation               *op,
1762         Entry                   *target,
1763         struct berval           *edn,
1764         AttributeDescription    *entry_at,
1765         struct berval           *nval,
1766         slap_access_t           access,
1767         slap_mask_t             *mask )
1768 {
1769         Entry           *e = NULL;
1770         void            *o_priv = op->o_private, *e_priv = NULL;
1771         int             rc = LDAP_INSUFFICIENT_ACCESS;
1772         Backend         *be = op->o_bd;
1773
1774         /* pedantic */
1775         assert( op != NULL );
1776         assert( op->o_conn != NULL );
1777         assert( edn != NULL );
1778         assert( access > ACL_NONE );
1779
1780         if ( !op->o_bd ) {
1781                 op->o_bd = select_backend( edn, 0 );
1782         }
1783
1784         if ( target && dn_match( &target->e_nname, edn ) ) {
1785                 e = target;
1786
1787         } else {
1788                 op->o_private = NULL;
1789                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1790                 e_priv = op->o_private;
1791                 op->o_private = o_priv;
1792         }
1793
1794         if ( e ) {
1795                 Attribute       *a = NULL;
1796                 int             freeattr = 0;
1797
1798                 if ( entry_at == NULL ) {
1799                         entry_at = slap_schema.si_ad_entry;
1800                 }
1801
1802                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1803                 {
1804                         if ( access_allowed_mask( op, e, entry_at,
1805                                         NULL, access, NULL, mask ) == 0 )
1806                         {
1807                                 rc = LDAP_INSUFFICIENT_ACCESS;
1808
1809                         } else {
1810                                 rc = LDAP_SUCCESS;
1811                         }
1812
1813                 } else {
1814                         a = attr_find( e->e_attrs, entry_at );
1815                         if ( a == NULL ) {
1816                                 SlapReply       rs = { 0 };
1817                                 AttributeName   anlist[ 2 ];
1818
1819                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1820                                 anlist[ 0 ].an_desc = entry_at;
1821                                 BER_BVZERO( &anlist[ 1 ].an_name );
1822                                 rs.sr_attrs = anlist;
1823
1824                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1825
1826                                 /* NOTE: backend_operational() is also called
1827                                  * when returning results, so it's supposed
1828                                  * to do no harm to entries */
1829                                 rs.sr_entry = e;
1830                                 rc = backend_operational( op, &rs );
1831                                 rs.sr_entry = NULL;
1832
1833                                 if ( rc == LDAP_SUCCESS ) {
1834                                         if ( rs.sr_operational_attrs ) {
1835                                                 freeattr = 1;
1836                                                 a = rs.sr_operational_attrs;
1837
1838                                         } else {
1839                                                 rc = LDAP_NO_SUCH_OBJECT;
1840                                         }
1841                                 }
1842                         }
1843
1844                         if ( a ) {
1845                                 if ( access_allowed_mask( op, e, entry_at,
1846                                                 nval, access, NULL, mask ) == 0 )
1847                                 {
1848                                         rc = LDAP_INSUFFICIENT_ACCESS;
1849                                         goto freeit;
1850                                 }
1851                                 rc = LDAP_SUCCESS;
1852                         }
1853                 }
1854 freeit:         if ( e != target ) {
1855                         op->o_private = e_priv;
1856                         be_entry_release_r( op, e );
1857                         op->o_private = o_priv;
1858                 }
1859                 if ( freeattr ) {
1860                         attr_free( a );
1861                 }
1862         }
1863
1864         op->o_bd = be;
1865         return rc;
1866 }
1867
1868 int
1869 fe_aux_operational(
1870         Operation *op,
1871         SlapReply *rs )
1872 {
1873         Attribute               **ap;
1874         int                     rc = LDAP_SUCCESS;
1875         BackendDB               *be_orig = op->o_bd;
1876         OpExtra         *oex;
1877
1878         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1879                 if ( oex->oe_key == (void *)backend_operational )
1880                         break;
1881         }
1882
1883         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1884                 /* just count them */ ;
1885
1886         /*
1887          * If operational attributes (allegedly) are required,
1888          * and the backend supports specific operational attributes,
1889          * add them to the attribute list
1890          */
1891         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1892                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1893                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1894         {
1895                 *ap = slap_operational_entryDN( rs->sr_entry );
1896                 ap = &(*ap)->a_next;
1897         }
1898
1899         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1900                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1901                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1902         {
1903                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1904                 ap = &(*ap)->a_next;
1905         }
1906
1907         /* Let the overlays have a chance at this */
1908         if ( oex && ((OpExtraDB *)oex)->oe_db )
1909                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1910
1911         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1912                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1913
1914         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1915                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1916                 op->o_bd->be_operational != NULL )
1917         {
1918                 rc = op->o_bd->be_operational( op, rs );
1919         }
1920         op->o_bd = be_orig;
1921
1922         return rc;
1923 }
1924
1925 int backend_operational( Operation *op, SlapReply *rs )
1926 {
1927         int rc;
1928         BackendDB *be_orig;
1929         OpExtraDB       oex;
1930
1931         oex.oe_db = op->o_bd;
1932         oex.oe.oe_key = (void *)backend_operational;
1933         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1934
1935         /* Moved this into the frontend so global overlays are called */
1936
1937         be_orig = op->o_bd;
1938         op->o_bd = frontendDB;
1939         rc = frontendDB->be_operational( op, rs );
1940         op->o_bd = be_orig;
1941         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1942
1943         return rc;
1944 }
1945