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 *ssf;
1009         int updateop = 0;
1010         int starttls = 0;
1011         int session = 0;
1012
1013         if ( op->o_bd ) {
1014                 int     rc = SLAP_CB_CONTINUE;
1015
1016                 if ( op->o_bd->be_chk_controls ) {
1017                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1018                 }
1019
1020                 if ( rc == SLAP_CB_CONTINUE ) {
1021                         rc = backend_check_controls( op, rs );
1022                 }
1023
1024                 if ( rc != LDAP_SUCCESS ) {
1025                         return rs->sr_err;
1026                 }
1027
1028                 restrictops = op->o_bd->be_restrictops;
1029                 requires = op->o_bd->be_requires;
1030                 ssf = &op->o_bd->be_ssf_set;
1031
1032         } else {
1033                 restrictops = frontendDB->be_restrictops;
1034                 requires = frontendDB->be_requires;
1035                 ssf = &frontendDB->be_ssf_set;
1036         }
1037
1038         switch( op->o_tag ) {
1039         case LDAP_REQ_ADD:
1040                 opflag = SLAP_RESTRICT_OP_ADD;
1041                 updateop++;
1042                 break;
1043         case LDAP_REQ_BIND:
1044                 opflag = SLAP_RESTRICT_OP_BIND;
1045                 session++;
1046                 break;
1047         case LDAP_REQ_COMPARE:
1048                 opflag = SLAP_RESTRICT_OP_COMPARE;
1049                 break;
1050         case LDAP_REQ_DELETE:
1051                 updateop++;
1052                 opflag = SLAP_RESTRICT_OP_DELETE;
1053                 break;
1054         case LDAP_REQ_EXTENDED:
1055                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1056
1057                 if( !opdata ) {
1058                         /* treat unspecified as a modify */
1059                         opflag = SLAP_RESTRICT_OP_MODIFY;
1060                         updateop++;
1061                         break;
1062                 }
1063
1064                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1065                         session++;
1066                         starttls++;
1067                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1068                         break;
1069                 }
1070
1071                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1072                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1073                         break;
1074                 }
1075
1076                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1077                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1078                         break;
1079                 }
1080
1081                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1082                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1083                         updateop++;
1084                         break;
1085                 }
1086
1087                 /* treat everything else as a modify */
1088                 opflag = SLAP_RESTRICT_OP_MODIFY;
1089                 updateop++;
1090                 break;
1091
1092         case LDAP_REQ_MODIFY:
1093                 updateop++;
1094                 opflag = SLAP_RESTRICT_OP_MODIFY;
1095                 break;
1096         case LDAP_REQ_RENAME:
1097                 updateop++;
1098                 opflag = SLAP_RESTRICT_OP_RENAME;
1099                 break;
1100         case LDAP_REQ_SEARCH:
1101                 opflag = SLAP_RESTRICT_OP_SEARCH;
1102                 break;
1103         case LDAP_REQ_UNBIND:
1104                 session++;
1105                 opflag = 0;
1106                 break;
1107         default:
1108                 rs->sr_text = "restrict operations internal error";
1109                 rs->sr_err = LDAP_OTHER;
1110                 return rs->sr_err;
1111         }
1112
1113         if ( !starttls ) {
1114                 /* these checks don't apply to StartTLS */
1115
1116                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1117                 if( op->o_transport_ssf < ssf->sss_transport ) {
1118                         rs->sr_text = op->o_transport_ssf
1119                                 ? "stronger transport confidentiality required"
1120                                 : "transport confidentiality required";
1121                         return rs->sr_err;
1122                 }
1123
1124                 if( op->o_tls_ssf < ssf->sss_tls ) {
1125                         rs->sr_text = op->o_tls_ssf
1126                                 ? "stronger TLS confidentiality required"
1127                                 : "TLS confidentiality required";
1128                         return rs->sr_err;
1129                 }
1130
1131
1132                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1133                         /* simple bind specific check */
1134                         if( op->o_ssf < ssf->sss_simple_bind ) {
1135                                 rs->sr_text = op->o_ssf
1136                                         ? "stronger confidentiality required"
1137                                         : "confidentiality required";
1138                                 return rs->sr_err;
1139                         }
1140                 }
1141
1142                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1143                         /* these checks don't apply to SASL bind */
1144
1145                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1146                                 rs->sr_text = op->o_sasl_ssf
1147                                         ? "stronger SASL confidentiality required"
1148                                         : "SASL confidentiality required";
1149                                 return rs->sr_err;
1150                         }
1151
1152                         if( op->o_ssf < ssf->sss_ssf ) {
1153                                 rs->sr_text = op->o_ssf
1154                                         ? "stronger confidentiality required"
1155                                         : "confidentiality required";
1156                                 return rs->sr_err;
1157                         }
1158                 }
1159
1160                 if( updateop ) {
1161                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1162                                 rs->sr_text = op->o_transport_ssf
1163                                         ? "stronger transport confidentiality required for update"
1164                                         : "transport confidentiality required for update";
1165                                 return rs->sr_err;
1166                         }
1167
1168                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1169                                 rs->sr_text = op->o_tls_ssf
1170                                         ? "stronger TLS confidentiality required for update"
1171                                         : "TLS confidentiality required for update";
1172                                 return rs->sr_err;
1173                         }
1174
1175                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1176                                 rs->sr_text = op->o_sasl_ssf
1177                                         ? "stronger SASL confidentiality required for update"
1178                                         : "SASL confidentiality required for update";
1179                                 return rs->sr_err;
1180                         }
1181
1182                         if( op->o_ssf < ssf->sss_update_ssf ) {
1183                                 rs->sr_text = op->o_ssf
1184                                         ? "stronger confidentiality required for update"
1185                                         : "confidentiality required for update";
1186                                 return rs->sr_err;
1187                         }
1188
1189                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1190                                 BER_BVISEMPTY( &op->o_ndn ) )
1191                         {
1192                                 rs->sr_text = "modifications require authentication";
1193                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1194                                 return rs->sr_err;
1195                         }
1196
1197 #ifdef SLAP_X_LISTENER_MOD
1198                         if ( op->o_conn->c_listener &&
1199                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1200                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1201                         {
1202                                 /* no "w" mode means readonly */
1203                                 rs->sr_text = "modifications not allowed on this listener";
1204                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1205                                 return rs->sr_err;
1206                         }
1207 #endif /* SLAP_X_LISTENER_MOD */
1208                 }
1209         }
1210
1211         if ( !session ) {
1212                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1213
1214                 if( requires & SLAP_REQUIRE_STRONG ) {
1215                         /* should check mechanism */
1216                         if( ( op->o_transport_ssf < ssf->sss_transport
1217                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1218                                 || BER_BVISEMPTY( &op->o_dn ) )
1219                         {
1220                                 rs->sr_text = "strong(er) authentication required";
1221                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1222                                 return rs->sr_err;
1223                         }
1224                 }
1225
1226                 if( requires & SLAP_REQUIRE_SASL ) {
1227                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1228                                 rs->sr_text = "SASL authentication required";
1229                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1230                                 return rs->sr_err;
1231                         }
1232                 }
1233
1234                 if( requires & SLAP_REQUIRE_AUTHC ) {
1235                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1236                                 rs->sr_text = "authentication required";
1237                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1238                                 return rs->sr_err;
1239                         }
1240                 }
1241
1242                 if( requires & SLAP_REQUIRE_BIND ) {
1243                         int version;
1244                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1245                         version = op->o_conn->c_protocol;
1246                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1247
1248                         if( !version ) {
1249                                 /* no bind has occurred */
1250                                 rs->sr_text = "BIND required";
1251                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1252                                 return rs->sr_err;
1253                         }
1254                 }
1255
1256                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1257                         if( op->o_protocol < LDAP_VERSION3 ) {
1258                                 /* no bind has occurred */
1259                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1260                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1261                                 return rs->sr_err;
1262                         }
1263                 }
1264
1265 #ifdef SLAP_X_LISTENER_MOD
1266                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1267                         if ( op->o_conn->c_listener &&
1268                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1269                 {
1270                                 /* no "x" mode means bind required */
1271                                 rs->sr_text = "bind required on this listener";
1272                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1273                                 return rs->sr_err;
1274                         }
1275                 }
1276
1277                 if ( !starttls && !updateop ) {
1278                         if ( op->o_conn->c_listener &&
1279                                 !( op->o_conn->c_listener->sl_perms &
1280                                         ( !BER_BVISEMPTY( &op->o_dn )
1281                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1282                         {
1283                                 /* no "r" mode means no read */
1284                                 rs->sr_text = "read not allowed on this listener";
1285                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1286                                 return rs->sr_err;
1287                         }
1288                 }
1289 #endif /* SLAP_X_LISTENER_MOD */
1290
1291         }
1292
1293         if( ( restrictops & opflag )
1294                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1295                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1296                         rs->sr_text = "read operations restricted";
1297                 } else if ( restrictops & exopflag ) {
1298                         rs->sr_text = "extended operation restricted";
1299                 } else {
1300                         rs->sr_text = "operation restricted";
1301                 }
1302                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1303                 return rs->sr_err;
1304         }
1305
1306         rs->sr_err = LDAP_SUCCESS;
1307         return rs->sr_err;
1308 }
1309
1310 int backend_check_referrals( Operation *op, SlapReply *rs )
1311 {
1312         rs->sr_err = LDAP_SUCCESS;
1313
1314         if( op->o_bd->be_chk_referrals ) {
1315                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1316
1317                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1318                         send_ldap_result( op, rs );
1319                 }
1320         }
1321
1322         return rs->sr_err;
1323 }
1324
1325 int
1326 be_entry_get_rw(
1327         Operation *op,
1328         struct berval *ndn,
1329         ObjectClass *oc,
1330         AttributeDescription *at,
1331         int rw,
1332         Entry **e )
1333 {
1334         *e = NULL;
1335
1336         if ( op->o_bd == NULL ) {
1337                 return LDAP_NO_SUCH_OBJECT;
1338         }
1339
1340         if ( op->o_bd->be_fetch ) {
1341                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1342         }
1343
1344         return LDAP_UNWILLING_TO_PERFORM;
1345 }
1346
1347 int
1348 fe_acl_group(
1349         Operation *op,
1350         Entry   *target,
1351         struct berval *gr_ndn,
1352         struct berval *op_ndn,
1353         ObjectClass *group_oc,
1354         AttributeDescription *group_at )
1355 {
1356         Entry *e;
1357         void *o_priv = op->o_private, *e_priv = NULL;
1358         Attribute *a;
1359         int rc;
1360         GroupAssertion *g;
1361         Backend *be = op->o_bd;
1362         OpExtra         *oex;
1363
1364         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1365                 if ( oex->oe_key == (void *)backend_group )
1366                         break;
1367         }
1368
1369         if ( oex && ((OpExtraDB *)oex)->oe_db )
1370                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1371
1372         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1373                 op->o_bd = select_backend( gr_ndn, 0 );
1374
1375         for ( g = op->o_groups; g; g = g->ga_next ) {
1376                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1377                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1378                 {
1379                         continue;
1380                 }
1381                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1382                         break;
1383                 }
1384         }
1385
1386         if ( g ) {
1387                 rc = g->ga_res;
1388                 goto done;
1389         }
1390
1391         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1392                 e = target;
1393                 rc = 0;
1394
1395         } else {
1396                 op->o_private = NULL;
1397                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1398                 e_priv = op->o_private;
1399                 op->o_private = o_priv;
1400         }
1401
1402         if ( e ) {
1403                 a = attr_find( e->e_attrs, group_at );
1404                 if ( a ) {
1405                         /* If the attribute is a subtype of labeledURI,
1406                          * treat this as a dynamic group ala groupOfURLs
1407                          */
1408                         if ( is_at_subtype( group_at->ad_type,
1409                                 slap_schema.si_ad_labeledURI->ad_type ) )
1410                         {
1411                                 int i;
1412                                 LDAPURLDesc *ludp;
1413                                 struct berval bv, nbase;
1414                                 Filter *filter;
1415                                 Entry *user = NULL;
1416                                 void *user_priv = NULL;
1417                                 Backend *b2 = op->o_bd;
1418
1419                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1420                                         user = target;
1421                                 }
1422
1423                                 rc = LDAP_COMPARE_FALSE;
1424                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1425                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1426                                                 LDAP_URL_SUCCESS )
1427                                         {
1428                                                 continue;
1429                                         }
1430
1431                                         BER_BVZERO( &nbase );
1432
1433                                         /* host, attrs and extensions parts must be empty */
1434                                         if ( ( ludp->lud_host && *ludp->lud_host )
1435                                                 || ludp->lud_attrs
1436                                                 || ludp->lud_exts )
1437                                         {
1438                                                 goto loopit;
1439                                         }
1440
1441                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1442                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1443                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1444                                         {
1445                                                 goto loopit;
1446                                         }
1447
1448                                         switch ( ludp->lud_scope ) {
1449                                         case LDAP_SCOPE_BASE:
1450                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1451                                                         goto loopit;
1452                                                 }
1453                                                 break;
1454                                         case LDAP_SCOPE_ONELEVEL:
1455                                                 dnParent( op_ndn, &bv );
1456                                                 if ( !dn_match( &nbase, &bv ) ) {
1457                                                         goto loopit;
1458                                                 }
1459                                                 break;
1460                                         case LDAP_SCOPE_SUBTREE:
1461                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1462                                                         goto loopit;
1463                                                 }
1464                                                 break;
1465                                         case LDAP_SCOPE_SUBORDINATE:
1466                                                 if ( dn_match( &nbase, op_ndn ) ||
1467                                                         !dnIsSuffix( op_ndn, &nbase ) )
1468                                                 {
1469                                                         goto loopit;
1470                                                 }
1471                                         }
1472
1473                                         /* NOTE: this could be NULL
1474                                          * if no filter is provided,
1475                                          * or if filter parsing fails.
1476                                          * In the latter case,
1477                                          * we should give up. */
1478                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1479                                                 filter = str2filter_x( op, ludp->lud_filter );
1480                                                 if ( filter == NULL ) {
1481                                                         /* give up... */
1482                                                         rc = LDAP_OTHER;
1483                                                         goto loopit;
1484                                                 }
1485
1486                                                 /* only get user if required
1487                                                  * and not available yet */
1488                                                 if ( user == NULL ) {
1489                                                         int rc2;
1490
1491                                                         op->o_bd = select_backend( op_ndn, 0 );
1492                                                         op->o_private = NULL;
1493                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1494                                                         user_priv = op->o_private;
1495                                                         op->o_private = o_priv;
1496                                                         if ( rc2 != 0 ) {
1497                                                                 /* give up... */
1498                                                                 rc = LDAP_OTHER;
1499                                                                 goto loopit;
1500                                                         }
1501                                                 }
1502
1503                                                 if ( test_filter( NULL, user, filter ) ==
1504                                                         LDAP_COMPARE_TRUE )
1505                                                 {
1506                                                         rc = 0;
1507                                                 }
1508                                                 filter_free_x( op, filter, 1 );
1509                                         }
1510 loopit:
1511                                         ldap_free_urldesc( ludp );
1512                                         if ( !BER_BVISNULL( &nbase ) ) {
1513                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1514                                         }
1515                                         if ( rc != LDAP_COMPARE_FALSE ) {
1516                                                 break;
1517                                         }
1518                                 }
1519
1520                                 if ( user != NULL && user != target ) {
1521                                         op->o_private = user_priv;
1522                                         be_entry_release_r( op, user );
1523                                         op->o_private = o_priv;
1524                                 }
1525                                 op->o_bd = b2;
1526
1527                         } else {
1528                                 rc = attr_valfind( a,
1529                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1530                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1531                                         op_ndn, NULL, op->o_tmpmemctx );
1532                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1533                                         rc = LDAP_COMPARE_FALSE;
1534                                 }
1535                         }
1536
1537                 } else {
1538                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1539                 }
1540
1541                 if ( e != target ) {
1542                         op->o_private = e_priv;
1543                         be_entry_release_r( op, e );
1544                         op->o_private = o_priv;
1545                 }
1546
1547         } else {
1548                 rc = LDAP_NO_SUCH_OBJECT;
1549         }
1550
1551         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1552                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1553                         op->o_tmpmemctx );
1554                 g->ga_be = op->o_bd;
1555                 g->ga_oc = group_oc;
1556                 g->ga_at = group_at;
1557                 g->ga_res = rc;
1558                 g->ga_len = gr_ndn->bv_len;
1559                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1560                 g->ga_next = op->o_groups;
1561                 op->o_groups = g;
1562         }
1563
1564 done:
1565         op->o_bd = be;
1566         return rc;
1567 }
1568
1569 int
1570 backend_group(
1571         Operation *op,
1572         Entry   *target,
1573         struct berval *gr_ndn,
1574         struct berval *op_ndn,
1575         ObjectClass *group_oc,
1576         AttributeDescription *group_at )
1577 {
1578         int                     rc;
1579         BackendDB *be_orig;
1580         OpExtraDB       oex;
1581
1582         if ( op->o_abandon ) {
1583                 return SLAPD_ABANDON;
1584         }
1585
1586         oex.oe_db = op->o_bd;
1587         oex.oe.oe_key = (void *)backend_group;
1588         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1589
1590         be_orig = op->o_bd;
1591         op->o_bd = frontendDB;
1592         rc = frontendDB->be_group( op, target, gr_ndn,
1593                 op_ndn, group_oc, group_at );
1594         op->o_bd = be_orig;
1595         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1596
1597         return rc;
1598 }
1599
1600 int
1601 fe_acl_attribute(
1602         Operation *op,
1603         Entry   *target,
1604         struct berval   *edn,
1605         AttributeDescription *entry_at,
1606         BerVarray *vals,
1607         slap_access_t access )
1608 {
1609         Entry                   *e = NULL;
1610         void                    *o_priv = op->o_private, *e_priv = NULL;
1611         Attribute               *a = NULL;
1612         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1613         AccessControlState      acl_state = ACL_STATE_INIT;
1614         Backend                 *be = op->o_bd;
1615         OpExtra         *oex;
1616
1617         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1618                 if ( oex->oe_key == (void *)backend_attribute )
1619                         break;
1620         }
1621
1622         if ( oex && ((OpExtraDB *)oex)->oe_db )
1623                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1624
1625         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1626                 op->o_bd = select_backend( edn, 0 );
1627
1628         if ( target && dn_match( &target->e_nname, edn ) ) {
1629                 e = target;
1630
1631         } else {
1632                 op->o_private = NULL;
1633                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1634                 e_priv = op->o_private;
1635                 op->o_private = o_priv;
1636         }
1637
1638         if ( e ) {
1639                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1640                         assert( vals == NULL );
1641
1642                         rc = LDAP_SUCCESS;
1643                         if ( op->o_conn && access > ACL_NONE &&
1644                                 access_allowed( op, e, entry_at, NULL,
1645                                                 access, &acl_state ) == 0 )
1646                         {
1647                                 rc = LDAP_INSUFFICIENT_ACCESS;
1648                         }
1649                         goto freeit;
1650                 }
1651
1652                 a = attr_find( e->e_attrs, entry_at );
1653                 if ( a == NULL ) {
1654                         SlapReply       rs = { 0 };
1655                         AttributeName   anlist[ 2 ];
1656
1657                         anlist[ 0 ].an_name = entry_at->ad_cname;
1658                         anlist[ 0 ].an_desc = entry_at;
1659                         BER_BVZERO( &anlist[ 1 ].an_name );
1660                         rs.sr_attrs = anlist;
1661
1662                         /* NOTE: backend_operational() is also called
1663                          * when returning results, so it's supposed
1664                          * to do no harm to entries */
1665                         rs.sr_entry = e;
1666                         rc = backend_operational( op, &rs );
1667                         rs.sr_entry = NULL;
1668
1669                         if ( rc == LDAP_SUCCESS ) {
1670                                 if ( rs.sr_operational_attrs ) {
1671                                         freeattr = 1;
1672                                         a = rs.sr_operational_attrs;
1673
1674                                 } else {
1675                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1676                                 }
1677                         }
1678                 }
1679
1680                 if ( a ) {
1681                         BerVarray v;
1682
1683                         if ( op->o_conn && access > ACL_NONE &&
1684                                 access_allowed( op, e, entry_at, NULL,
1685                                                 access, &acl_state ) == 0 )
1686                         {
1687                                 rc = LDAP_INSUFFICIENT_ACCESS;
1688                                 goto freeit;
1689                         }
1690
1691                         i = a->a_numvals;
1692                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1693                                 op->o_tmpmemctx );
1694                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1695                         {
1696                                 if ( op->o_conn && access > ACL_NONE &&
1697                                         access_allowed( op, e, entry_at,
1698                                                         &a->a_nvals[i],
1699                                                         access,
1700                                                         &acl_state ) == 0 )
1701                                 {
1702                                         continue;
1703                                 }
1704                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1705                                                 op->o_tmpmemctx );
1706                                 if ( !BER_BVISNULL( &v[j] ) ) {
1707                                         j++;
1708                                 }
1709                         }
1710                         if ( j == 0 ) {
1711                                 op->o_tmpfree( v, op->o_tmpmemctx );
1712                                 *vals = NULL;
1713                                 rc = LDAP_INSUFFICIENT_ACCESS;
1714
1715                         } else {
1716                                 BER_BVZERO( &v[j] );
1717                                 *vals = v;
1718                                 rc = LDAP_SUCCESS;
1719                         }
1720                 }
1721 freeit:         if ( e != target ) {
1722                         op->o_private = e_priv;
1723                         be_entry_release_r( op, e );
1724                         op->o_private = o_priv;
1725                 }
1726                 if ( freeattr ) {
1727                         attr_free( a );
1728                 }
1729         }
1730
1731         op->o_bd = be;
1732         return rc;
1733 }
1734
1735 int
1736 backend_attribute(
1737         Operation *op,
1738         Entry   *target,
1739         struct berval   *edn,
1740         AttributeDescription *entry_at,
1741         BerVarray *vals,
1742         slap_access_t access )
1743 {
1744         int                     rc;
1745         BackendDB *be_orig;
1746         OpExtraDB       oex;
1747
1748         oex.oe_db = op->o_bd;
1749         oex.oe.oe_key = (void *)backend_attribute;
1750         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1751
1752         be_orig = op->o_bd;
1753         op->o_bd = frontendDB;
1754         rc = frontendDB->be_attribute( op, target, edn,
1755                 entry_at, vals, access );
1756         op->o_bd = be_orig;
1757         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1758
1759         return rc;
1760 }
1761
1762 int
1763 backend_access(
1764         Operation               *op,
1765         Entry                   *target,
1766         struct berval           *edn,
1767         AttributeDescription    *entry_at,
1768         struct berval           *nval,
1769         slap_access_t           access,
1770         slap_mask_t             *mask )
1771 {
1772         Entry           *e = NULL;
1773         void            *o_priv = op->o_private, *e_priv = NULL;
1774         int             rc = LDAP_INSUFFICIENT_ACCESS;
1775         Backend         *be = op->o_bd;
1776
1777         /* pedantic */
1778         assert( op != NULL );
1779         assert( op->o_conn != NULL );
1780         assert( edn != NULL );
1781         assert( access > ACL_NONE );
1782
1783         if ( !op->o_bd ) {
1784                 op->o_bd = select_backend( edn, 0 );
1785         }
1786
1787         if ( target && dn_match( &target->e_nname, edn ) ) {
1788                 e = target;
1789
1790         } else {
1791                 op->o_private = NULL;
1792                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1793                 e_priv = op->o_private;
1794                 op->o_private = o_priv;
1795         }
1796
1797         if ( e ) {
1798                 Attribute       *a = NULL;
1799                 int             freeattr = 0;
1800
1801                 if ( entry_at == NULL ) {
1802                         entry_at = slap_schema.si_ad_entry;
1803                 }
1804
1805                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1806                 {
1807                         if ( access_allowed_mask( op, e, entry_at,
1808                                         NULL, access, NULL, mask ) == 0 )
1809                         {
1810                                 rc = LDAP_INSUFFICIENT_ACCESS;
1811
1812                         } else {
1813                                 rc = LDAP_SUCCESS;
1814                         }
1815
1816                 } else {
1817                         a = attr_find( e->e_attrs, entry_at );
1818                         if ( a == NULL ) {
1819                                 SlapReply       rs = { 0 };
1820                                 AttributeName   anlist[ 2 ];
1821
1822                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1823                                 anlist[ 0 ].an_desc = entry_at;
1824                                 BER_BVZERO( &anlist[ 1 ].an_name );
1825                                 rs.sr_attrs = anlist;
1826
1827                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1828
1829                                 /* NOTE: backend_operational() is also called
1830                                  * when returning results, so it's supposed
1831                                  * to do no harm to entries */
1832                                 rs.sr_entry = e;
1833                                 rc = backend_operational( op, &rs );
1834                                 rs.sr_entry = NULL;
1835
1836                                 if ( rc == LDAP_SUCCESS ) {
1837                                         if ( rs.sr_operational_attrs ) {
1838                                                 freeattr = 1;
1839                                                 a = rs.sr_operational_attrs;
1840
1841                                         } else {
1842                                                 rc = LDAP_NO_SUCH_OBJECT;
1843                                         }
1844                                 }
1845                         }
1846
1847                         if ( a ) {
1848                                 if ( access_allowed_mask( op, e, entry_at,
1849                                                 nval, access, NULL, mask ) == 0 )
1850                                 {
1851                                         rc = LDAP_INSUFFICIENT_ACCESS;
1852                                         goto freeit;
1853                                 }
1854                                 rc = LDAP_SUCCESS;
1855                         }
1856                 }
1857 freeit:         if ( e != target ) {
1858                         op->o_private = e_priv;
1859                         be_entry_release_r( op, e );
1860                         op->o_private = o_priv;
1861                 }
1862                 if ( freeattr ) {
1863                         attr_free( a );
1864                 }
1865         }
1866
1867         op->o_bd = be;
1868         return rc;
1869 }
1870
1871 int
1872 fe_aux_operational(
1873         Operation *op,
1874         SlapReply *rs )
1875 {
1876         Attribute               **ap;
1877         int                     rc = LDAP_SUCCESS;
1878         BackendDB               *be_orig = op->o_bd;
1879         OpExtra         *oex;
1880
1881         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1882                 if ( oex->oe_key == (void *)backend_operational )
1883                         break;
1884         }
1885
1886         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1887                 /* just count them */ ;
1888
1889         /*
1890          * If operational attributes (allegedly) are required,
1891          * and the backend supports specific operational attributes,
1892          * add them to the attribute list
1893          */
1894         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1895                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1896                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1897         {
1898                 *ap = slap_operational_entryDN( rs->sr_entry );
1899                 ap = &(*ap)->a_next;
1900         }
1901
1902         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1903                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1904                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1905         {
1906                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1907                 ap = &(*ap)->a_next;
1908         }
1909
1910         /* Let the overlays have a chance at this */
1911         if ( oex && ((OpExtraDB *)oex)->oe_db )
1912                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1913
1914         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1915                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1916
1917         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1918                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1919                 op->o_bd->be_operational != NULL )
1920         {
1921                 rc = op->o_bd->be_operational( op, rs );
1922         }
1923         op->o_bd = be_orig;
1924
1925         return rc;
1926 }
1927
1928 int backend_operational( Operation *op, SlapReply *rs )
1929 {
1930         int rc;
1931         BackendDB *be_orig;
1932         OpExtraDB       oex;
1933
1934         oex.oe_db = op->o_bd;
1935         oex.oe.oe_key = (void *)backend_operational;
1936         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1937
1938         /* Moved this into the frontend so global overlays are called */
1939
1940         be_orig = op->o_bd;
1941         op->o_bd = frontendDB;
1942         rc = frontendDB->be_operational( op, rs );
1943         op->o_bd = be_orig;
1944         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1945
1946         return rc;
1947 }
1948