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, frontendDB->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, frontendDB->be_acl );
 504         }
 505
 506         return 0;
 507 }
 508
 509 BackendInfo* backend_info(const char *type)
 510 {
 511         BackendInfo *bi;
 512
 513         /* search for the backend type */
 514         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 515                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 516                         return bi;
 517                 }
 518         }
 519
 520         return NULL;
 521 }
 522
 523 void
 524 backend_db_insert(
 525         BackendDB *be,
 526         int idx
 527 )
 528 {
 529         /* If idx < 0, just add to end of list */
 530         if ( idx < 0 ) {
 531                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 532         } else if ( idx == 0 ) {
 533                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 534         } else {
 535                 int i;
 536                 BackendDB *b2;
 537
 538                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 539                 idx--;
 540                 for (i=0; i<idx; i++) {
 541                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 542                 }
 543                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 544         }
 545 }
 546
 547 void
 548 backend_db_move(
 549         BackendDB *be,
 550         int idx
 551 )
 552 {
 553         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 554         backend_db_insert(be, idx);
 555 }
 556
 557 BackendDB *
 558 backend_db_init(
 559     const char  *type,
 560         BackendDB *b0,
 561         int idx,
 562         ConfigReply *cr)
 563 {
 564         BackendInfo *bi = backend_info(type);
 565         BackendDB *be = b0;
 566         int     rc = 0;
 567
 568         if( bi == NULL ) {
 569                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 570                 return NULL;
 571         }
 572
 573         /* If be is provided, treat it as private. Otherwise allocate
 574          * one and add it to the global list.
 575          */
 576         if ( !be ) {
 577                 be = ch_calloc( 1, sizeof(Backend) );
 578                 /* Just append */
 579                 if ( idx >= nbackends )
 580                         idx = -1;
 581                 nbackends++;
 582                 backend_db_insert( be, idx );
 583         }
 584
 585         be->bd_info = bi;
 586         be->bd_self = be;
 587
 588         be->be_def_limit = frontendDB->be_def_limit;
 589         be->be_dfltaccess = frontendDB->be_dfltaccess;
 590
 591         be->be_restrictops = frontendDB->be_restrictops;
 592         be->be_requires = frontendDB->be_requires;
 593         be->be_ssf_set = frontendDB->be_ssf_set;
 594
 595         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 596
 597         /* assign a default depth limit for alias deref */
 598         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 599
 600         if ( bi->bi_db_init ) {
 601                 rc = bi->bi_db_init( be, cr );
 602         }
 603
 604         if ( rc != 0 ) {
 605                 fprintf( stderr, "database init failed (%s)\n", type );
 606                 /* If we created and linked this be, remove it and free it */
 607                 if ( !b0 ) {
 608                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 609                         ch_free( be );
 610                         be = NULL;
 611                         nbackends--;
 612                 }
 613         } else {
 614                 bi->bi_nDB++;
 615         }
 616         return( be );
 617 }
 618
 619 void
 620 be_db_close( void )
 621 {
 622         BackendDB *be;
 623
 624         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 625                 if ( be->bd_info->bi_db_close ) {
 626                         be->bd_info->bi_db_close( be, NULL );
 627                 }
 628         }
 629
 630         if ( frontendDB->bd_info->bi_db_close ) {
 631                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 632         }
 633
 634 }
 635
 636 Backend *
 637 select_backend(
 638         struct berval * dn,
 639         int noSubs )
 640 {
 641         int             j;
 642         ber_len_t       len, dnlen = dn->bv_len;
 643         Backend         *be;
 644
 645         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 646                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 647                         continue;
 648                 }
 649
 650                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 651                 {
 652                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 653                         {
 654                                 continue;
 655                         }
 656
 657                         len = be->be_nsuffix[j].bv_len;
 658
 659                         if ( len > dnlen ) {
 660                                 /* suffix is longer than DN */
 661                                 continue;
 662                         }
 663
 664                         /*
 665                          * input DN is normalized, so the separator check
 666                          * need not look at escaping
 667                          */
 668                         if ( len && len < dnlen &&
 669                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 670                         {
 671                                 continue;
 672                         }
 673
 674                         if ( strcmp( be->be_nsuffix[j].bv_val,
 675                                 &dn->bv_val[dnlen-len] ) == 0 )
 676                         {
 677                                 return be;
 678                         }
 679                 }
 680         }
 681
 682         return be;
 683 }
 684
 685 int
 686 be_issuffix(
 687     Backend *be,
 688     struct berval *bvsuffix )
 689 {
 690         int     i;
 691
 692         if ( be->be_nsuffix == NULL ) {
 693                 return 0;
 694         }
 695
 696         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 697                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 698                         return 1;
 699                 }
 700         }
 701
 702         return 0;
 703 }
 704
 705 int
 706 be_issubordinate(
 707     Backend *be,
 708     struct berval *bvsubordinate )
 709 {
 710         int     i;
 711
 712         if ( be->be_nsuffix == NULL ) {
 713                 return 0;
 714         }
 715
 716         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 717                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 718                         return 1;
 719                 }
 720         }
 721
 722         return 0;
 723 }
 724
 725 int
 726 be_isroot_dn( Backend *be, struct berval *ndn )
 727 {
 728         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 729                 return 0;
 730         }
 731
 732         return dn_match( &be->be_rootndn, ndn );
 733 }
 734
 735 int
 736 be_slurp_update( Operation *op )
 737 {
 738         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 739                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 740 }
 741
 742 int
 743 be_shadow_update( Operation *op )
 744 {
 745         /* This assumes that all internal ops (connid == -1) on a syncrepl
 746          * database are syncrepl operations.
 747          */
 748         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 749                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 750 }
 751
 752 int
 753 be_isupdate_dn( Backend *be, struct berval *ndn )
 754 {
 755         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 756                 return 0;
 757         }
 758
 759         return dn_match( &be->be_update_ndn, ndn );
 760 }
 761
 762 struct berval *
 763 be_root_dn( Backend *be )
 764 {
 765         return &be->be_rootdn;
 766 }
 767
 768 int
 769 be_isroot( Operation *op )
 770 {
 771         return be_isroot_dn( op->o_bd, &op->o_ndn );
 772 }
 773
 774 int
 775 be_isroot_pw( Operation *op )
 776 {
 777         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 778 }
 779
 780 /*
 781  * checks if binding as rootdn
 782  *
 783  * return value:
 784  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 785  *      LDAP_SUCCESS                    if rootdn & rootpw
 786  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 787  *
 788  * if rs != NULL
 789  *      if LDAP_SUCCESS, op->orb_edn is set
 790  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 791  */
 792 int
 793 be_rootdn_bind( Operation *op, SlapReply *rs )
 794 {
 795         int             rc;
 796 #ifdef SLAPD_SPASSWD
 797         void    *old_authctx = NULL;
 798 #endif
 799
 800         assert( op->o_tag == LDAP_REQ_BIND );
 801         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 802
 803         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 804                 return SLAP_CB_CONTINUE;
 805         }
 806
 807         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 808                 /* give the database a chance */
 809                 return SLAP_CB_CONTINUE;
 810         }
 811
 812         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 813                 /* rootdn bind explicitly disallowed */
 814                 rc = LDAP_INVALID_CREDENTIALS;
 815                 if ( rs ) {
 816                         goto send_result;
 817                 }
 818
 819                 return rc;
 820         }
 821
 822 #ifdef SLAPD_SPASSWD
 823         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 824                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 825 #endif
 826
 827         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 828
 829 #ifdef SLAPD_SPASSWD
 830         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 831                 old_authctx, 0, NULL, NULL );
 832 #endif
 833
 834         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 835         if ( rs ) {
 836 send_result:;
 837                 rs->sr_err = rc;
 838
 839                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 840                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 841                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 842
 843                 if ( rc == LDAP_SUCCESS ) {
 844                         /* Set to the pretty rootdn */
 845                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 846
 847                 } else {
 848                         send_ldap_result( op, rs );
 849                 }
 850         }
 851
 852         return rc;
 853 }
 854
 855 int
 856 be_entry_release_rw(
 857         Operation *op,
 858         Entry *e,
 859         int rw )
 860 {
 861         if ( op->o_bd->be_release ) {
 862                 /* free and release entry from backend */
 863                 return op->o_bd->be_release( op, e, rw );
 864         } else {
 865                 /* free entry */
 866                 entry_free( e );
 867                 return 0;
 868         }
 869 }
 870
 871 int
 872 backend_unbind( Operation *op, SlapReply *rs )
 873 {
 874         BackendDB *be;
 875
 876         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 877                 if ( be->be_unbind ) {
 878                         op->o_bd = be;
 879                         be->be_unbind( op, rs );
 880                 }
 881         }
 882
 883         return 0;
 884 }
 885
 886 int
 887 backend_connection_init(
 888         Connection   *conn )
 889 {
 890         BackendDB *be;
 891
 892         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 893                 if ( be->be_connection_init ) {
 894                         be->be_connection_init( be, conn );
 895                 }
 896         }
 897
 898         return 0;
 899 }
 900
 901 int
 902 backend_connection_destroy(
 903         Connection   *conn )
 904 {
 905         BackendDB *be;
 906
 907         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 908                 if ( be->be_connection_destroy ) {
 909                         be->be_connection_destroy( be, conn);
 910                 }
 911         }
 912
 913         return 0;
 914 }
 915
 916 int
 917 backend_check_controls(
 918         Operation *op,
 919         SlapReply *rs )
 920 {
 921         LDAPControl **ctrls = op->o_ctrls;
 922         rs->sr_err = LDAP_SUCCESS;
 923
 924         if( ctrls ) {
 925                 for( ; *ctrls != NULL ; ctrls++ ) {
 926                         int cid;
 927
 928                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 929                         case LDAP_CONTROL_NOT_FOUND:
 930                                 /* unrecognized control */
 931                                 if ( (*ctrls)->ldctl_iscritical ) {
 932                                         /* should not be reachable */
 933                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 934                                                 "unrecognized critical control: %s\n",
 935                                                 (*ctrls)->ldctl_oid, 0, 0 );
 936                                         assert( 0 );
 937                                 } else {
 938                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 939                                                 "unrecognized non-critical control: %s\n",
 940                                                 (*ctrls)->ldctl_oid, 0, 0 );
 941                                 }
 942                                 break;
 943
 944                         case LDAP_COMPARE_FALSE:
 945                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 946 #ifdef SLAP_CONTROL_X_WHATFAILED
 947                                         if ( get_whatFailed( op ) ) {
 948                                                 char *oids[ 2 ] = { (*ctrls)->ldctl_oid, NULL };
 949                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 950                                         }
 951 #endif
 952                                         /* RFC 4511 allows unavailableCriticalExtension to be
 953                                          * returned when the server is unwilling to perform
 954                                          * an operation extended by a recognized critical
 955                                          * control.
 956                                          */
 957                                         rs->sr_text = "critical control unavailable in context";
 958                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 959                                         goto done;
 960                                 }
 961                                 break;
 962
 963                         case LDAP_COMPARE_TRUE:
 964                                 break;
 965
 966                         default:
 967                                 /* unreachable */
 968                                 Debug( LDAP_DEBUG_ANY,
 969                                         "backend_check_controls: unable to check control: %s\n",
 970                                         (*ctrls)->ldctl_oid, 0, 0 );
 971                                 assert( 0 );
 972
 973                                 rs->sr_text = "unable to check control";
 974                                 rs->sr_err = LDAP_OTHER;
 975                                 goto done;
 976                         }
 977                 }
 978         }
 979
 980 #if 0 /* temporarily removed */
 981         /* check should be generalized */
 982         if( get_relax(op) && !be_isroot(op)) {
 983                 rs->sr_text = "requires manager authorization";
 984                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 985         }
 986 #endif
 987
 988 done:;
 989         return rs->sr_err;
 990 }
 991
 992 int
 993 backend_check_restrictions(
 994         Operation *op,
 995         SlapReply *rs,
 996         struct berval *opdata )
 997 {
 998         slap_mask_t restrictops;
 999         slap_mask_t requires;
1000         slap_mask_t opflag;
1001         slap_mask_t exopflag = 0;
1002         slap_ssf_set_t *ssf;
1003         int updateop = 0;
1004         int starttls = 0;
1005         int session = 0;
1006
1007         if ( op->o_bd ) {
1008                 int     rc = SLAP_CB_CONTINUE;
1009
1010                 if ( op->o_bd->be_chk_controls ) {
1011                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1012                 }
1013
1014                 if ( rc == SLAP_CB_CONTINUE ) {
1015                         rc = backend_check_controls( op, rs );
1016                 }
1017
1018                 if ( rc != LDAP_SUCCESS ) {
1019                         return rs->sr_err;
1020                 }
1021
1022                 restrictops = op->o_bd->be_restrictops;
1023                 requires = op->o_bd->be_requires;
1024                 ssf = &op->o_bd->be_ssf_set;
1025
1026         } else {
1027                 restrictops = frontendDB->be_restrictops;
1028                 requires = frontendDB->be_requires;
1029                 ssf = &frontendDB->be_ssf_set;
1030         }
1031
1032         switch( op->o_tag ) {
1033         case LDAP_REQ_ADD:
1034                 opflag = SLAP_RESTRICT_OP_ADD;
1035                 updateop++;
1036                 break;
1037         case LDAP_REQ_BIND:
1038                 opflag = SLAP_RESTRICT_OP_BIND;
1039                 session++;
1040                 break;
1041         case LDAP_REQ_COMPARE:
1042                 opflag = SLAP_RESTRICT_OP_COMPARE;
1043                 break;
1044         case LDAP_REQ_DELETE:
1045                 updateop++;
1046                 opflag = SLAP_RESTRICT_OP_DELETE;
1047                 break;
1048         case LDAP_REQ_EXTENDED:
1049                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1050
1051                 if( !opdata ) {
1052                         /* treat unspecified as a modify */
1053                         opflag = SLAP_RESTRICT_OP_MODIFY;
1054                         updateop++;
1055                         break;
1056                 }
1057
1058                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1059                         session++;
1060                         starttls++;
1061                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1062                         break;
1063                 }
1064
1065                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1066                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1067                         break;
1068                 }
1069
1070                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1071                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1072                         break;
1073                 }
1074
1075                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1076                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1077                         updateop++;
1078                         break;
1079                 }
1080
1081                 /* treat everything else as a modify */
1082                 opflag = SLAP_RESTRICT_OP_MODIFY;
1083                 updateop++;
1084                 break;
1085
1086         case LDAP_REQ_MODIFY:
1087                 updateop++;
1088                 opflag = SLAP_RESTRICT_OP_MODIFY;
1089                 break;
1090         case LDAP_REQ_RENAME:
1091                 updateop++;
1092                 opflag = SLAP_RESTRICT_OP_RENAME;
1093                 break;
1094         case LDAP_REQ_SEARCH:
1095                 opflag = SLAP_RESTRICT_OP_SEARCH;
1096                 break;
1097         case LDAP_REQ_UNBIND:
1098                 session++;
1099                 opflag = 0;
1100                 break;
1101         default:
1102                 rs->sr_text = "restrict operations internal error";
1103                 rs->sr_err = LDAP_OTHER;
1104                 return rs->sr_err;
1105         }
1106
1107         if ( !starttls ) {
1108                 /* these checks don't apply to StartTLS */
1109
1110                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1111                 if( op->o_transport_ssf < ssf->sss_transport ) {
1112                         rs->sr_text = op->o_transport_ssf
1113                                 ? "stronger transport confidentiality required"
1114                                 : "transport confidentiality required";
1115                         return rs->sr_err;
1116                 }
1117
1118                 if( op->o_tls_ssf < ssf->sss_tls ) {
1119                         rs->sr_text = op->o_tls_ssf
1120                                 ? "stronger TLS confidentiality required"
1121                                 : "TLS confidentiality required";
1122                         return rs->sr_err;
1123                 }
1124
1125
1126                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1127                         /* simple bind specific check */
1128                         if( op->o_ssf < ssf->sss_simple_bind ) {
1129                                 rs->sr_text = op->o_ssf
1130                                         ? "stronger confidentiality required"
1131                                         : "confidentiality required";
1132                                 return rs->sr_err;
1133                         }
1134                 }
1135
1136                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1137                         /* these checks don't apply to SASL bind */
1138
1139                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1140                                 rs->sr_text = op->o_sasl_ssf
1141                                         ? "stronger SASL confidentiality required"
1142                                         : "SASL confidentiality required";
1143                                 return rs->sr_err;
1144                         }
1145
1146                         if( op->o_ssf < ssf->sss_ssf ) {
1147                                 rs->sr_text = op->o_ssf
1148                                         ? "stronger confidentiality required"
1149                                         : "confidentiality required";
1150                                 return rs->sr_err;
1151                         }
1152                 }
1153
1154                 if( updateop ) {
1155                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1156                                 rs->sr_text = op->o_transport_ssf
1157                                         ? "stronger transport confidentiality required for update"
1158                                         : "transport confidentiality required for update";
1159                                 return rs->sr_err;
1160                         }
1161
1162                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1163                                 rs->sr_text = op->o_tls_ssf
1164                                         ? "stronger TLS confidentiality required for update"
1165                                         : "TLS confidentiality required for update";
1166                                 return rs->sr_err;
1167                         }
1168
1169                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1170                                 rs->sr_text = op->o_sasl_ssf
1171                                         ? "stronger SASL confidentiality required for update"
1172                                         : "SASL confidentiality required for update";
1173                                 return rs->sr_err;
1174                         }
1175
1176                         if( op->o_ssf < ssf->sss_update_ssf ) {
1177                                 rs->sr_text = op->o_ssf
1178                                         ? "stronger confidentiality required for update"
1179                                         : "confidentiality required for update";
1180                                 return rs->sr_err;
1181                         }
1182
1183                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1184                                 BER_BVISEMPTY( &op->o_ndn ) )
1185                         {
1186                                 rs->sr_text = "modifications require authentication";
1187                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1188                                 return rs->sr_err;
1189                         }
1190
1191 #ifdef SLAP_X_LISTENER_MOD
1192                         if ( op->o_conn->c_listener &&
1193                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1194                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1195                         {
1196                                 /* no "w" mode means readonly */
1197                                 rs->sr_text = "modifications not allowed on this listener";
1198                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1199                                 return rs->sr_err;
1200                         }
1201 #endif /* SLAP_X_LISTENER_MOD */
1202                 }
1203         }
1204
1205         if ( !session ) {
1206                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1207
1208                 if( requires & SLAP_REQUIRE_STRONG ) {
1209                         /* should check mechanism */
1210                         if( ( op->o_transport_ssf < ssf->sss_transport
1211                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1212                                 || BER_BVISEMPTY( &op->o_dn ) )
1213                         {
1214                                 rs->sr_text = "strong(er) authentication required";
1215                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1216                                 return rs->sr_err;
1217                         }
1218                 }
1219
1220                 if( requires & SLAP_REQUIRE_SASL ) {
1221                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1222                                 rs->sr_text = "SASL authentication required";
1223                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1224                                 return rs->sr_err;
1225                         }
1226                 }
1227
1228                 if( requires & SLAP_REQUIRE_AUTHC ) {
1229                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1230                                 rs->sr_text = "authentication required";
1231                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1232                                 return rs->sr_err;
1233                         }
1234                 }
1235
1236                 if( requires & SLAP_REQUIRE_BIND ) {
1237                         int version;
1238                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1239                         version = op->o_conn->c_protocol;
1240                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1241
1242                         if( !version ) {
1243                                 /* no bind has occurred */
1244                                 rs->sr_text = "BIND required";
1245                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1246                                 return rs->sr_err;
1247                         }
1248                 }
1249
1250                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1251                         if( op->o_protocol < LDAP_VERSION3 ) {
1252                                 /* no bind has occurred */
1253                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1254                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1255                                 return rs->sr_err;
1256                         }
1257                 }
1258
1259 #ifdef SLAP_X_LISTENER_MOD
1260                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1261                         if ( op->o_conn->c_listener &&
1262                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1263                 {
1264                                 /* no "x" mode means bind required */
1265                                 rs->sr_text = "bind required on this listener";
1266                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1267                                 return rs->sr_err;
1268                         }
1269                 }
1270
1271                 if ( !starttls && !updateop ) {
1272                         if ( op->o_conn->c_listener &&
1273                                 !( op->o_conn->c_listener->sl_perms &
1274                                         ( !BER_BVISEMPTY( &op->o_dn )
1275                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1276                         {
1277                                 /* no "r" mode means no read */
1278                                 rs->sr_text = "read not allowed on this listener";
1279                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1280                                 return rs->sr_err;
1281                         }
1282                 }
1283 #endif /* SLAP_X_LISTENER_MOD */
1284
1285         }
1286
1287         if( ( restrictops & opflag )
1288                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1289                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1290                         rs->sr_text = "read operations restricted";
1291                 } else if ( restrictops & exopflag ) {
1292                         rs->sr_text = "extended operation restricted";
1293                 } else {
1294                         rs->sr_text = "operation restricted";
1295                 }
1296                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1297                 return rs->sr_err;
1298         }
1299
1300         rs->sr_err = LDAP_SUCCESS;
1301         return rs->sr_err;
1302 }
1303
1304 int backend_check_referrals( Operation *op, SlapReply *rs )
1305 {
1306         rs->sr_err = LDAP_SUCCESS;
1307
1308         if( op->o_bd->be_chk_referrals ) {
1309                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1310
1311                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1312                         send_ldap_result( op, rs );
1313                 }
1314         }
1315
1316         return rs->sr_err;
1317 }
1318
1319 int
1320 be_entry_get_rw(
1321         Operation *op,
1322         struct berval *ndn,
1323         ObjectClass *oc,
1324         AttributeDescription *at,
1325         int rw,
1326         Entry **e )
1327 {
1328         *e = NULL;
1329
1330         if ( op->o_bd == NULL ) {
1331                 return LDAP_NO_SUCH_OBJECT;
1332         }
1333
1334         if ( op->o_bd->be_fetch ) {
1335                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1336         }
1337
1338         return LDAP_UNWILLING_TO_PERFORM;
1339 }
1340
1341 int
1342 fe_acl_group(
1343         Operation *op,
1344         Entry   *target,
1345         struct berval *gr_ndn,
1346         struct berval *op_ndn,
1347         ObjectClass *group_oc,
1348         AttributeDescription *group_at )
1349 {
1350         Entry *e;
1351         void *o_priv = op->o_private, *e_priv = NULL;
1352         Attribute *a;
1353         int rc;
1354         GroupAssertion *g;
1355         Backend *be = op->o_bd;
1356         OpExtra         *oex;
1357
1358         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1359                 if ( oex->oe_key == (void *)backend_group )
1360                         break;
1361         }
1362
1363         if ( oex && ((OpExtraDB *)oex)->oe_db )
1364                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1365
1366         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1367                 op->o_bd = select_backend( gr_ndn, 0 );
1368
1369         for ( g = op->o_groups; g; g = g->ga_next ) {
1370                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1371                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1372                 {
1373                         continue;
1374                 }
1375                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1376                         break;
1377                 }
1378         }
1379
1380         if ( g ) {
1381                 rc = g->ga_res;
1382                 goto done;
1383         }
1384
1385         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1386                 e = target;
1387                 rc = 0;
1388
1389         } else {
1390                 op->o_private = NULL;
1391                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1392                 e_priv = op->o_private;
1393                 op->o_private = o_priv;
1394         }
1395
1396         if ( e ) {
1397                 a = attr_find( e->e_attrs, group_at );
1398                 if ( a ) {
1399                         /* If the attribute is a subtype of labeledURI,
1400                          * treat this as a dynamic group ala groupOfURLs
1401                          */
1402                         if ( is_at_subtype( group_at->ad_type,
1403                                 slap_schema.si_ad_labeledURI->ad_type ) )
1404                         {
1405                                 int i;
1406                                 LDAPURLDesc *ludp;
1407                                 struct berval bv, nbase;
1408                                 Filter *filter;
1409                                 Entry *user = NULL;
1410                                 void *user_priv = NULL;
1411                                 Backend *b2 = op->o_bd;
1412
1413                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1414                                         user = target;
1415                                 }
1416
1417                                 rc = LDAP_COMPARE_FALSE;
1418                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1419                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1420                                                 LDAP_URL_SUCCESS )
1421                                         {
1422                                                 continue;
1423                                         }
1424
1425                                         BER_BVZERO( &nbase );
1426
1427                                         /* host, attrs and extensions parts must be empty */
1428                                         if ( ( ludp->lud_host && *ludp->lud_host )
1429                                                 || ludp->lud_attrs
1430                                                 || ludp->lud_exts )
1431                                         {
1432                                                 goto loopit;
1433                                         }
1434
1435                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1436                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1437                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1438                                         {
1439                                                 goto loopit;
1440                                         }
1441
1442                                         switch ( ludp->lud_scope ) {
1443                                         case LDAP_SCOPE_BASE:
1444                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1445                                                         goto loopit;
1446                                                 }
1447                                                 break;
1448                                         case LDAP_SCOPE_ONELEVEL:
1449                                                 dnParent( op_ndn, &bv );
1450                                                 if ( !dn_match( &nbase, &bv ) ) {
1451                                                         goto loopit;
1452                                                 }
1453                                                 break;
1454                                         case LDAP_SCOPE_SUBTREE:
1455                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1456                                                         goto loopit;
1457                                                 }
1458                                                 break;
1459                                         case LDAP_SCOPE_SUBORDINATE:
1460                                                 if ( dn_match( &nbase, op_ndn ) ||
1461                                                         !dnIsSuffix( op_ndn, &nbase ) )
1462                                                 {
1463                                                         goto loopit;
1464                                                 }
1465                                         }
1466
1467                                         /* NOTE: this could be NULL
1468                                          * if no filter is provided,
1469                                          * or if filter parsing fails.
1470                                          * In the latter case,
1471                                          * we should give up. */
1472                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1473                                                 filter = str2filter_x( op, ludp->lud_filter );
1474                                                 if ( filter == NULL ) {
1475                                                         /* give up... */
1476                                                         rc = LDAP_OTHER;
1477                                                         goto loopit;
1478                                                 }
1479
1480                                                 /* only get user if required
1481                                                  * and not available yet */
1482                                                 if ( user == NULL ) {
1483                                                         int rc2;
1484
1485                                                         op->o_bd = select_backend( op_ndn, 0 );
1486                                                         op->o_private = NULL;
1487                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1488                                                         user_priv = op->o_private;
1489                                                         op->o_private = o_priv;
1490                                                         if ( rc2 != 0 ) {
1491                                                                 /* give up... */
1492                                                                 rc = LDAP_OTHER;
1493                                                                 goto loopit;
1494                                                         }
1495                                                 }
1496
1497                                                 if ( test_filter( NULL, user, filter ) ==
1498                                                         LDAP_COMPARE_TRUE )
1499                                                 {
1500                                                         rc = 0;
1501                                                 }
1502                                                 filter_free_x( op, filter, 1 );
1503                                         }
1504 loopit:
1505                                         ldap_free_urldesc( ludp );
1506                                         if ( !BER_BVISNULL( &nbase ) ) {
1507                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1508                                         }
1509                                         if ( rc != LDAP_COMPARE_FALSE ) {
1510                                                 break;
1511                                         }
1512                                 }
1513
1514                                 if ( user != NULL && user != target ) {
1515                                         op->o_private = user_priv;
1516                                         be_entry_release_r( op, user );
1517                                         op->o_private = o_priv;
1518                                 }
1519                                 op->o_bd = b2;
1520
1521                         } else {
1522                                 rc = attr_valfind( a,
1523                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1524                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1525                                         op_ndn, NULL, op->o_tmpmemctx );
1526                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1527                                         rc = LDAP_COMPARE_FALSE;
1528                                 }
1529                         }
1530
1531                 } else {
1532                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1533                 }
1534
1535                 if ( e != target ) {
1536                         op->o_private = e_priv;
1537                         be_entry_release_r( op, e );
1538                         op->o_private = o_priv;
1539                 }
1540
1541         } else {
1542                 rc = LDAP_NO_SUCH_OBJECT;
1543         }
1544
1545         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1546                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1547                         op->o_tmpmemctx );
1548                 g->ga_be = op->o_bd;
1549                 g->ga_oc = group_oc;
1550                 g->ga_at = group_at;
1551                 g->ga_res = rc;
1552                 g->ga_len = gr_ndn->bv_len;
1553                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1554                 g->ga_next = op->o_groups;
1555                 op->o_groups = g;
1556         }
1557
1558 done:
1559         op->o_bd = be;
1560         return rc;
1561 }
1562
1563 int
1564 backend_group(
1565         Operation *op,
1566         Entry   *target,
1567         struct berval *gr_ndn,
1568         struct berval *op_ndn,
1569         ObjectClass *group_oc,
1570         AttributeDescription *group_at )
1571 {
1572         int                     rc;
1573         BackendDB *be_orig;
1574         OpExtraDB       oex;
1575
1576         if ( op->o_abandon ) {
1577                 return SLAPD_ABANDON;
1578         }
1579
1580         oex.oe_db = op->o_bd;
1581         oex.oe.oe_key = (void *)backend_group;
1582         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1583
1584         be_orig = op->o_bd;
1585         op->o_bd = frontendDB;
1586         rc = frontendDB->be_group( op, target, gr_ndn,
1587                 op_ndn, group_oc, group_at );
1588         op->o_bd = be_orig;
1589         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1590
1591         return rc;
1592 }
1593
1594 int
1595 fe_acl_attribute(
1596         Operation *op,
1597         Entry   *target,
1598         struct berval   *edn,
1599         AttributeDescription *entry_at,
1600         BerVarray *vals,
1601         slap_access_t access )
1602 {
1603         Entry                   *e = NULL;
1604         void                    *o_priv = op->o_private, *e_priv = NULL;
1605         Attribute               *a = NULL;
1606         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1607         AccessControlState      acl_state = ACL_STATE_INIT;
1608         Backend                 *be = op->o_bd;
1609         OpExtra         *oex;
1610
1611         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1612                 if ( oex->oe_key == (void *)backend_attribute )
1613                         break;
1614         }
1615
1616         if ( oex && ((OpExtraDB *)oex)->oe_db )
1617                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1618
1619         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1620                 op->o_bd = select_backend( edn, 0 );
1621
1622         if ( target && dn_match( &target->e_nname, edn ) ) {
1623                 e = target;
1624
1625         } else {
1626                 op->o_private = NULL;
1627                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1628                 e_priv = op->o_private;
1629                 op->o_private = o_priv;
1630         }
1631
1632         if ( e ) {
1633                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1634                         assert( vals == NULL );
1635
1636                         rc = LDAP_SUCCESS;
1637                         if ( op->o_conn && access > ACL_NONE &&
1638                                 access_allowed( op, e, entry_at, NULL,
1639                                                 access, &acl_state ) == 0 )
1640                         {
1641                                 rc = LDAP_INSUFFICIENT_ACCESS;
1642                         }
1643                         goto freeit;
1644                 }
1645
1646                 a = attr_find( e->e_attrs, entry_at );
1647                 if ( a == NULL ) {
1648                         SlapReply       rs = { 0 };
1649                         AttributeName   anlist[ 2 ];
1650
1651                         anlist[ 0 ].an_name = entry_at->ad_cname;
1652                         anlist[ 0 ].an_desc = entry_at;
1653                         BER_BVZERO( &anlist[ 1 ].an_name );
1654                         rs.sr_attrs = anlist;
1655
1656                         /* NOTE: backend_operational() is also called
1657                          * when returning results, so it's supposed
1658                          * to do no harm to entries */
1659                         rs.sr_entry = e;
1660                         rc = backend_operational( op, &rs );
1661                         rs.sr_entry = NULL;
1662
1663                         if ( rc == LDAP_SUCCESS ) {
1664                                 if ( rs.sr_operational_attrs ) {
1665                                         freeattr = 1;
1666                                         a = rs.sr_operational_attrs;
1667
1668                                 } else {
1669                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1670                                 }
1671                         }
1672                 }
1673
1674                 if ( a ) {
1675                         BerVarray v;
1676
1677                         if ( op->o_conn && access > ACL_NONE &&
1678                                 access_allowed( op, e, entry_at, NULL,
1679                                                 access, &acl_state ) == 0 )
1680                         {
1681                                 rc = LDAP_INSUFFICIENT_ACCESS;
1682                                 goto freeit;
1683                         }
1684
1685                         i = a->a_numvals;
1686                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1687                                 op->o_tmpmemctx );
1688                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1689                         {
1690                                 if ( op->o_conn && access > ACL_NONE &&
1691                                         access_allowed( op, e, entry_at,
1692                                                         &a->a_nvals[i],
1693                                                         access,
1694                                                         &acl_state ) == 0 )
1695                                 {
1696                                         continue;
1697                                 }
1698                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1699                                                 op->o_tmpmemctx );
1700                                 if ( !BER_BVISNULL( &v[j] ) ) {
1701                                         j++;
1702                                 }
1703                         }
1704                         if ( j == 0 ) {
1705                                 op->o_tmpfree( v, op->o_tmpmemctx );
1706                                 *vals = NULL;
1707                                 rc = LDAP_INSUFFICIENT_ACCESS;
1708
1709                         } else {
1710                                 BER_BVZERO( &v[j] );
1711                                 *vals = v;
1712                                 rc = LDAP_SUCCESS;
1713                         }
1714                 }
1715 freeit:         if ( e != target ) {
1716                         op->o_private = e_priv;
1717                         be_entry_release_r( op, e );
1718                         op->o_private = o_priv;
1719                 }
1720                 if ( freeattr ) {
1721                         attr_free( a );
1722                 }
1723         }
1724
1725         op->o_bd = be;
1726         return rc;
1727 }
1728
1729 int
1730 backend_attribute(
1731         Operation *op,
1732         Entry   *target,
1733         struct berval   *edn,
1734         AttributeDescription *entry_at,
1735         BerVarray *vals,
1736         slap_access_t access )
1737 {
1738         int                     rc;
1739         BackendDB *be_orig;
1740         OpExtraDB       oex;
1741
1742         oex.oe_db = op->o_bd;
1743         oex.oe.oe_key = (void *)backend_attribute;
1744         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1745
1746         be_orig = op->o_bd;
1747         op->o_bd = frontendDB;
1748         rc = frontendDB->be_attribute( op, target, edn,
1749                 entry_at, vals, access );
1750         op->o_bd = be_orig;
1751         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1752
1753         return rc;
1754 }
1755
1756 int
1757 backend_access(
1758         Operation               *op,
1759         Entry                   *target,
1760         struct berval           *edn,
1761         AttributeDescription    *entry_at,
1762         struct berval           *nval,
1763         slap_access_t           access,
1764         slap_mask_t             *mask )
1765 {
1766         Entry           *e = NULL;
1767         void            *o_priv = op->o_private, *e_priv = NULL;
1768         int             rc = LDAP_INSUFFICIENT_ACCESS;
1769         Backend         *be = op->o_bd;
1770
1771         /* pedantic */
1772         assert( op != NULL );
1773         assert( op->o_conn != NULL );
1774         assert( edn != NULL );
1775         assert( access > ACL_NONE );
1776
1777         if ( !op->o_bd ) {
1778                 op->o_bd = select_backend( edn, 0 );
1779         }
1780
1781         if ( target && dn_match( &target->e_nname, edn ) ) {
1782                 e = target;
1783
1784         } else {
1785                 op->o_private = NULL;
1786                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1787                 e_priv = op->o_private;
1788                 op->o_private = o_priv;
1789         }
1790
1791         if ( e ) {
1792                 Attribute       *a = NULL;
1793                 int             freeattr = 0;
1794
1795                 if ( entry_at == NULL ) {
1796                         entry_at = slap_schema.si_ad_entry;
1797                 }
1798
1799                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1800                 {
1801                         if ( access_allowed_mask( op, e, entry_at,
1802                                         NULL, access, NULL, mask ) == 0 )
1803                         {
1804                                 rc = LDAP_INSUFFICIENT_ACCESS;
1805
1806                         } else {
1807                                 rc = LDAP_SUCCESS;
1808                         }
1809
1810                 } else {
1811                         a = attr_find( e->e_attrs, entry_at );
1812                         if ( a == NULL ) {
1813                                 SlapReply       rs = { 0 };
1814                                 AttributeName   anlist[ 2 ];
1815
1816                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1817                                 anlist[ 0 ].an_desc = entry_at;
1818                                 BER_BVZERO( &anlist[ 1 ].an_name );
1819                                 rs.sr_attrs = anlist;
1820
1821                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1822
1823                                 /* NOTE: backend_operational() is also called
1824                                  * when returning results, so it's supposed
1825                                  * to do no harm to entries */
1826                                 rs.sr_entry = e;
1827                                 rc = backend_operational( op, &rs );
1828                                 rs.sr_entry = NULL;
1829
1830                                 if ( rc == LDAP_SUCCESS ) {
1831                                         if ( rs.sr_operational_attrs ) {
1832                                                 freeattr = 1;
1833                                                 a = rs.sr_operational_attrs;
1834
1835                                         } else {
1836                                                 rc = LDAP_NO_SUCH_OBJECT;
1837                                         }
1838                                 }
1839                         }
1840
1841                         if ( a ) {
1842                                 if ( access_allowed_mask( op, e, entry_at,
1843                                                 nval, access, NULL, mask ) == 0 )
1844                                 {
1845                                         rc = LDAP_INSUFFICIENT_ACCESS;
1846                                         goto freeit;
1847                                 }
1848                                 rc = LDAP_SUCCESS;
1849                         }
1850                 }
1851 freeit:         if ( e != target ) {
1852                         op->o_private = e_priv;
1853                         be_entry_release_r( op, e );
1854                         op->o_private = o_priv;
1855                 }
1856                 if ( freeattr ) {
1857                         attr_free( a );
1858                 }
1859         }
1860
1861         op->o_bd = be;
1862         return rc;
1863 }
1864
1865 int
1866 fe_aux_operational(
1867         Operation *op,
1868         SlapReply *rs )
1869 {
1870         Attribute               **ap;
1871         int                     rc = LDAP_SUCCESS;
1872         BackendDB               *be_orig = op->o_bd;
1873         OpExtra         *oex;
1874
1875         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1876                 if ( oex->oe_key == (void *)backend_operational )
1877                         break;
1878         }
1879
1880         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1881                 /* just count them */ ;
1882
1883         /*
1884          * If operational attributes (allegedly) are required,
1885          * and the backend supports specific operational attributes,
1886          * add them to the attribute list
1887          */
1888         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1889                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1890                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1891         {
1892                 *ap = slap_operational_entryDN( rs->sr_entry );
1893                 ap = &(*ap)->a_next;
1894         }
1895
1896         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1897                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1898                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1899         {
1900                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1901                 ap = &(*ap)->a_next;
1902         }
1903
1904         /* Let the overlays have a chance at this */
1905         if ( oex && ((OpExtraDB *)oex)->oe_db )
1906                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1907
1908         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1909                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1910
1911         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1912                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1913                 op->o_bd->be_operational != NULL )
1914         {
1915                 rc = op->o_bd->be_operational( op, rs );
1916         }
1917         op->o_bd = be_orig;
1918
1919         return rc;
1920 }
1921
1922 int backend_operational( Operation *op, SlapReply *rs )
1923 {
1924         int rc;
1925         BackendDB *be_orig;
1926         OpExtraDB       oex;
1927
1928         oex.oe_db = op->o_bd;
1929         oex.oe.oe_key = (void *)backend_operational;
1930         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1931
1932         /* Moved this into the frontend so global overlays are called */
1933
1934         be_orig = op->o_bd;
1935         op->o_bd = frontendDB;
1936         rc = frontendDB->be_operational( op, rs );
1937         op->o_bd = be_orig;
1938         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1939
1940         return rc;
1941 }
1942