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

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "config.h"
  38 #include "lutil.h"
  39 #include "lber_pvt.h"
  40
  41 /*
  42  * If a module is configured as dynamic, its header should not
  43  * get included into slapd. While this is a general rule and does
  44  * not have much of an effect in UNIX, this rule should be adhered
  45  * to for Windows, where dynamic object code should not be implicitly
  46  * imported into slapd without appropriate __declspec(dllimport) directives.
  47  */
  48
  49 int                     nBackendInfo = 0;
  50 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  51
  52 int                     nBackendDB = 0;
  53 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  54
  55 static int
  56 backend_init_controls( BackendInfo *bi )
  57 {
  58         if ( bi->bi_controls ) {
  59                 int     i;
  60
  61                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  62                         int     cid;
  63
  64                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  65                                         == LDAP_CONTROL_NOT_FOUND )
  66                         {
  67                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  68                                         assert( 0 );
  69                                 }
  70
  71                                 return -1;
  72                         }
  73
  74                         bi->bi_ctrls[ cid ] = 1;
  75                 }
  76         }
  77
  78         return 0;
  79 }
  80
  81 int backend_init(void)
  82 {
  83         int rc = -1;
  84         BackendInfo *bi;
  85
  86         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  87                 /* already initialized */
  88                 Debug( LDAP_DEBUG_ANY,
  89                         "backend_init: already initialized\n", 0, 0, 0 );
  90                 return -1;
  91         }
  92
  93         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  94                 assert( bi->bi_init != 0 );
  95
  96                 rc = bi->bi_init( bi );
  97
  98                 if(rc != 0) {
  99                         Debug( LDAP_DEBUG_ANY,
 100                                 "backend_init: initialized for type \"%s\"\n",
 101                                 bi->bi_type, 0, 0 );
 102                         /* destroy those we've already inited */
 103                         for( nBackendInfo--;
 104                                 nBackendInfo >= 0 ;
 105                                 nBackendInfo-- )
 106                         {
 107                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 108                                         slap_binfo[nBackendInfo].bi_destroy(
 109                                                 &slap_binfo[nBackendInfo] );
 110                                 }
 111                         }
 112                         return rc;
 113                 }
 114
 115                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 116         }
 117
 118         if ( nBackendInfo > 0) {
 119                 return 0;
 120         }
 121
 122 #ifdef SLAPD_MODULES
 123         return 0;
 124 #else
 125
 126         Debug( LDAP_DEBUG_ANY,
 127                 "backend_init: failed\n",
 128                 0, 0, 0 );
 129
 130         return rc;
 131 #endif /* SLAPD_MODULES */
 132 }
 133
 134 int backend_add(BackendInfo *aBackendInfo)
 135 {
 136         int rc = 0;
 137
 138         if ( aBackendInfo->bi_init == NULL ) {
 139                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 140                         "backend type \"%s\" does not have the (mandatory)init function\n",
 141                         aBackendInfo->bi_type, 0, 0 );
 142                 return -1;
 143         }
 144
 145         rc = aBackendInfo->bi_init(aBackendInfo);
 146         if ( rc != 0) {
 147                 Debug( LDAP_DEBUG_ANY,
 148                         "backend_add:  initialization for type \"%s\" failed\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return rc;
 151         }
 152
 153         (void)backend_init_controls( aBackendInfo );
 154
 155         /* now add the backend type to the Backend Info List */
 156         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 157         nBackendInfo++;
 158         return 0;
 159 }
 160
 161 static int
 162 backend_set_controls( BackendDB *be )
 163 {
 164         BackendInfo     *bi = be->bd_info;
 165
 166         /* back-relay takes care of itself; so may do other */
 167         if ( overlay_is_over( be ) ) {
 168                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 169         }
 170
 171         if ( bi->bi_controls ) {
 172                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 173                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 174                                         sizeof( be->be_ctrls ) );
 175                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 176
 177                 } else {
 178                         int     i;
 179
 180                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 181                                 if ( bi->bi_ctrls[ i ] ) {
 182                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 183                                 }
 184                         }
 185                 }
 186
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* startup a specific backend database */
 193 int backend_startup_one(Backend *be, ConfigReply *cr)
 194 {
 195         int             rc = 0;
 196
 197         assert( be != NULL );
 198
 199         be->be_pending_csn_list = (struct be_pcl *)
 200                 ch_calloc( 1, sizeof( struct be_pcl ) );
 201
 202         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 203
 204         Debug( LDAP_DEBUG_TRACE,
 205                 "backend_startup_one: starting \"%s\"\n",
 206                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 207                 0, 0 );
 208
 209         /* set database controls */
 210         (void)backend_set_controls( be );
 211
 212 #if 0
 213         if ( !BER_BVISEMPTY( &be->be_rootndn )
 214                 && select_backend( &be->be_rootndn, 0 ) == be
 215                 && BER_BVISNULL( &be->be_rootpw ) )
 216         {
 217                 /* warning: if rootdn entry is created,
 218                  * it can take rootdn privileges;
 219                  * set empty rootpw to prevent */
 220         }
 221 #endif
 222
 223         if ( be->bd_info->bi_db_open ) {
 224                 rc = be->bd_info->bi_db_open( be, cr );
 225                 if ( rc == 0 ) {
 226                         (void)backend_set_controls( be );
 227
 228                 } else {
 229                         Debug( LDAP_DEBUG_ANY,
 230                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 231                                 rc, 0, 0 );
 232                 }
 233         }
 234
 235         return rc;
 236 }
 237
 238 int backend_startup(Backend *be)
 239 {
 240         int i;
 241         int rc = 0;
 242         BackendInfo *bi;
 243         ConfigReply cr={0, ""};
 244
 245         if( ! ( nBackendDB > 0 ) ) {
 246                 /* no databases */
 247                 Debug( LDAP_DEBUG_ANY,
 248                         "backend_startup: %d databases to startup.\n",
 249                         nBackendDB, 0, 0 );
 250                 return 1;
 251         }
 252
 253         if(be != NULL) {
 254                 if ( be->bd_info->bi_open ) {
 255                         rc = be->bd_info->bi_open( be->bd_info );
 256                         if ( rc != 0 ) {
 257                                 Debug( LDAP_DEBUG_ANY,
 258                                         "backend_startup: bi_open failed!\n",
 259                                         0, 0, 0 );
 260
 261                                 return rc;
 262                         }
 263                 }
 264
 265                 return backend_startup_one( be, &cr );
 266         }
 267
 268         /* open frontend, if required */
 269         if ( frontendDB->bd_info->bi_db_open ) {
 270                 rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr );
 271                 if ( rc != 0 ) {
 272                         Debug( LDAP_DEBUG_ANY,
 273                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 274                                 rc, 0, 0 );
 275                         return rc;
 276                 }
 277         }
 278
 279         /* open each backend type */
 280         i = -1;
 281         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 282                 i++;
 283                 if( bi->bi_nDB == 0) {
 284                         /* no database of this type, don't open */
 285                         continue;
 286                 }
 287
 288                 if( bi->bi_open ) {
 289                         rc = bi->bi_open( bi );
 290                         if ( rc != 0 ) {
 291                                 Debug( LDAP_DEBUG_ANY,
 292                                         "backend_startup: bi_open %d (%s) failed!\n",
 293                                         i, bi->bi_type, 0 );
 294                                 return rc;
 295                         }
 296                 }
 297
 298                 (void)backend_init_controls( bi );
 299         }
 300
 301         /* open each backend database */
 302         i = -1;
 303         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 304                 i++;
 305                 if ( be->be_suffix == NULL ) {
 306                         Debug( LDAP_DEBUG_ANY,
 307                                 "backend_startup: warning, database %d (%s) "
 308                                 "has no suffix\n",
 309                                 i, be->bd_info->bi_type, 0 );
 310                 }
 311
 312                 rc = backend_startup_one( be, &cr );
 313
 314                 if ( rc ) return rc;
 315         }
 316
 317         return rc;
 318 }
 319
 320 int backend_num( Backend *be )
 321 {
 322         int i = 0;
 323         BackendDB *b2;
 324
 325         if( be == NULL ) return -1;
 326
 327         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 328                 if( be == b2 ) return i;
 329                 i++;
 330         }
 331         return -1;
 332 }
 333
 334 int backend_shutdown( Backend *be )
 335 {
 336         int rc = 0;
 337         BackendInfo *bi;
 338
 339         if( be != NULL ) {
 340                 /* shutdown a specific backend database */
 341
 342                 if ( be->bd_info->bi_nDB == 0 ) {
 343                         /* no database of this type, we never opened it */
 344                         return 0;
 345                 }
 346
 347                 if ( be->bd_info->bi_db_close ) {
 348                         rc = be->bd_info->bi_db_close( be, NULL );
 349                         if ( rc ) return rc;
 350                 }
 351
 352                 if( be->bd_info->bi_close ) {
 353                         rc = be->bd_info->bi_close( be->bd_info );
 354                         if ( rc ) return rc;
 355                 }
 356
 357                 return 0;
 358         }
 359
 360         /* close each backend database */
 361         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 362                 if ( be->bd_info->bi_db_close ) {
 363                         be->bd_info->bi_db_close( be, NULL );
 364                 }
 365
 366                 if(rc != 0) {
 367                         Debug( LDAP_DEBUG_ANY,
 368                                 "backend_close: bi_db_close %s failed!\n",
 369                                 be->be_type, 0, 0 );
 370                 }
 371         }
 372
 373         /* close each backend type */
 374         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 375                 if( bi->bi_nDB == 0 ) {
 376                         /* no database of this type */
 377                         continue;
 378                 }
 379
 380                 if( bi->bi_close ) {
 381                         bi->bi_close( bi );
 382                 }
 383         }
 384
 385         /* close frontend, if required */
 386         if ( frontendDB->bd_info->bi_db_close ) {
 387                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 388                 if ( rc != 0 ) {
 389                         Debug( LDAP_DEBUG_ANY,
 390                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 391                                 rc, 0, 0 );
 392                 }
 393         }
 394
 395         return 0;
 396 }
 397
 398 /*
 399  * This function is supposed to be the exact counterpart
 400  * of backend_startup_one(), although this one calls bi_db_destroy()
 401  * while backend_startup_one() calls bi_db_open().
 402  *
 403  * Make sure backend_stopdown_one() destroys resources allocated
 404  * by backend_startup_one(); only call backend_destroy_one() when
 405  * all stuff in a BackendDB needs to be destroyed
 406  */
 407 void
 408 backend_stopdown_one( BackendDB *bd )
 409 {
 410         if ( bd->be_pending_csn_list ) {
 411                 struct slap_csn_entry *csne;
 412                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 413                 while ( csne ) {
 414                         struct slap_csn_entry *tmp_csne = csne;
 415
 416                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 417                         ch_free( csne->ce_csn.bv_val );
 418                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 419                         ch_free( tmp_csne );
 420                 }
 421                 ch_free( bd->be_pending_csn_list );
 422         }
 423
 424         if ( bd->bd_info->bi_db_destroy ) {
 425                 bd->bd_info->bi_db_destroy( bd, NULL );
 426         }
 427 }
 428
 429 void backend_destroy_one( BackendDB *bd, int dynamic )
 430 {
 431         if ( dynamic ) {
 432                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 433         }
 434
 435         if ( bd->be_syncinfo ) {
 436                 syncinfo_free( bd->be_syncinfo, 1 );
 437         }
 438
 439         backend_stopdown_one( bd );
 440
 441         ber_bvarray_free( bd->be_suffix );
 442         ber_bvarray_free( bd->be_nsuffix );
 443         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 444                 free( bd->be_rootdn.bv_val );
 445         }
 446         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 447                 free( bd->be_rootndn.bv_val );
 448         }
 449         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 450                 free( bd->be_rootpw.bv_val );
 451         }
 452         acl_destroy( bd->be_acl );
 453         limits_destroy( bd->be_limits );
 454         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 455                 ch_free( bd->be_update_ndn.bv_val );
 456         }
 457         if ( bd->be_update_refs ) {
 458                 ber_bvarray_free( bd->be_update_refs );
 459         }
 460
 461         if ( dynamic ) {
 462                 free( bd );
 463         }
 464 }
 465
 466 int backend_destroy(void)
 467 {
 468         BackendDB *bd;
 469         BackendInfo *bi;
 470
 471         /* destroy each backend database */
 472         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 473                 backend_destroy_one( bd, 1 );
 474         }
 475
 476         /* destroy each backend type */
 477         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 478                 if( bi->bi_destroy ) {
 479                         bi->bi_destroy( bi );
 480                 }
 481         }
 482
 483         nBackendInfo = 0;
 484         LDAP_STAILQ_INIT(&backendInfo);
 485
 486         /* destroy frontend database */
 487         bd = frontendDB;
 488         if ( bd ) {
 489                 if ( bd->bd_info->bi_db_destroy ) {
 490                         bd->bd_info->bi_db_destroy( bd, NULL );
 491                 }
 492                 ber_bvarray_free( bd->be_suffix );
 493                 ber_bvarray_free( bd->be_nsuffix );
 494                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 495                         free( bd->be_rootdn.bv_val );
 496                 }
 497                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 498                         free( bd->be_rootndn.bv_val );
 499                 }
 500                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 501                         free( bd->be_rootpw.bv_val );
 502                 }
 503                 acl_destroy( bd->be_acl );
 504                 frontendDB = NULL;
 505         }
 506
 507         return 0;
 508 }
 509
 510 BackendInfo* backend_info(const char *type)
 511 {
 512         BackendInfo *bi;
 513
 514         /* search for the backend type */
 515         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 516                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 517                         return bi;
 518                 }
 519         }
 520
 521         return NULL;
 522 }
 523
 524 void
 525 backend_db_insert(
 526         BackendDB *be,
 527         int idx
 528 )
 529 {
 530         /* If idx < 0, just add to end of list */
 531         if ( idx < 0 ) {
 532                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 533         } else if ( idx == 0 ) {
 534                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 535         } else {
 536                 int i;
 537                 BackendDB *b2;
 538
 539                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 540                 idx--;
 541                 for (i=0; i<idx; i++) {
 542                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 543                 }
 544                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 545         }
 546 }
 547
 548 void
 549 backend_db_move(
 550         BackendDB *be,
 551         int idx
 552 )
 553 {
 554         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 555         backend_db_insert(be, idx);
 556 }
 557
 558 BackendDB *
 559 backend_db_init(
 560     const char  *type,
 561         BackendDB *b0,
 562         int idx,
 563         ConfigReply *cr)
 564 {
 565         BackendInfo *bi = backend_info(type);
 566         BackendDB *be = b0;
 567         int     rc = 0;
 568
 569         if( bi == NULL ) {
 570                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 571                 return NULL;
 572         }
 573
 574         /* If be is provided, treat it as private. Otherwise allocate
 575          * one and add it to the global list.
 576          */
 577         if ( !be ) {
 578                 be = ch_calloc( 1, sizeof(Backend) );
 579                 /* Just append */
 580                 if ( idx >= nbackends )
 581                         idx = -1;
 582                 nbackends++;
 583                 backend_db_insert( be, idx );
 584         }
 585
 586         be->bd_info = bi;
 587         be->bd_self = be;
 588
 589         be->be_def_limit = frontendDB->be_def_limit;
 590         be->be_dfltaccess = frontendDB->be_dfltaccess;
 591
 592         be->be_restrictops = frontendDB->be_restrictops;
 593         be->be_requires = frontendDB->be_requires;
 594         be->be_ssf_set = frontendDB->be_ssf_set;
 595
 596         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 597
 598         /* assign a default depth limit for alias deref */
 599         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 600
 601         if ( bi->bi_db_init ) {
 602                 rc = bi->bi_db_init( be, cr );
 603         }
 604
 605         if ( rc != 0 ) {
 606                 fprintf( stderr, "database init failed (%s)\n", type );
 607                 /* If we created and linked this be, remove it and free it */
 608                 if ( !b0 ) {
 609                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 610                         ch_free( be );
 611                         be = NULL;
 612                         nbackends--;
 613                 }
 614         } else {
 615                 bi->bi_nDB++;
 616         }
 617         return( be );
 618 }
 619
 620 void
 621 be_db_close( void )
 622 {
 623         BackendDB *be;
 624
 625         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 626                 if ( be->bd_info->bi_db_close ) {
 627                         be->bd_info->bi_db_close( be, NULL );
 628                 }
 629         }
 630
 631         if ( frontendDB->bd_info->bi_db_close ) {
 632                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 633         }
 634
 635 }
 636
 637 Backend *
 638 select_backend(
 639         struct berval * dn,
 640         int noSubs )
 641 {
 642         int             j;
 643         ber_len_t       len, dnlen = dn->bv_len;
 644         Backend         *be;
 645
 646         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 647                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 648                         continue;
 649                 }
 650
 651                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 652                 {
 653                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 654                         {
 655                                 continue;
 656                         }
 657
 658                         len = be->be_nsuffix[j].bv_len;
 659
 660                         if ( len > dnlen ) {
 661                                 /* suffix is longer than DN */
 662                                 continue;
 663                         }
 664
 665                         /*
 666                          * input DN is normalized, so the separator check
 667                          * need not look at escaping
 668                          */
 669                         if ( len && len < dnlen &&
 670                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 671                         {
 672                                 continue;
 673                         }
 674
 675                         if ( strcmp( be->be_nsuffix[j].bv_val,
 676                                 &dn->bv_val[dnlen-len] ) == 0 )
 677                         {
 678                                 return be;
 679                         }
 680                 }
 681         }
 682
 683         return be;
 684 }
 685
 686 int
 687 be_issuffix(
 688     Backend *be,
 689     struct berval *bvsuffix )
 690 {
 691         int     i;
 692
 693         if ( be->be_nsuffix == NULL ) {
 694                 return 0;
 695         }
 696
 697         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 698                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 699                         return 1;
 700                 }
 701         }
 702
 703         return 0;
 704 }
 705
 706 int
 707 be_issubordinate(
 708     Backend *be,
 709     struct berval *bvsubordinate )
 710 {
 711         int     i;
 712
 713         if ( be->be_nsuffix == NULL ) {
 714                 return 0;
 715         }
 716
 717         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 718                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 719                         return 1;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 int
 727 be_isroot_dn( Backend *be, struct berval *ndn )
 728 {
 729         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 730                 return 0;
 731         }
 732
 733         return dn_match( &be->be_rootndn, ndn );
 734 }
 735
 736 int
 737 be_slurp_update( Operation *op )
 738 {
 739         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 740                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 741 }
 742
 743 int
 744 be_shadow_update( Operation *op )
 745 {
 746         /* This assumes that all internal ops (connid == -1) on a syncrepl
 747          * database are syncrepl operations.
 748          */
 749         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 750                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 751 }
 752
 753 int
 754 be_isupdate_dn( Backend *be, struct berval *ndn )
 755 {
 756         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 757                 return 0;
 758         }
 759
 760         return dn_match( &be->be_update_ndn, ndn );
 761 }
 762
 763 struct berval *
 764 be_root_dn( Backend *be )
 765 {
 766         return &be->be_rootdn;
 767 }
 768
 769 int
 770 be_isroot( Operation *op )
 771 {
 772         return be_isroot_dn( op->o_bd, &op->o_ndn );
 773 }
 774
 775 int
 776 be_isroot_pw( Operation *op )
 777 {
 778         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 779 }
 780
 781 /*
 782  * checks if binding as rootdn
 783  *
 784  * return value:
 785  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 786  *      LDAP_SUCCESS                    if rootdn & rootpw
 787  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 788  *
 789  * if rs != NULL
 790  *      if LDAP_SUCCESS, op->orb_edn is set
 791  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 792  */
 793 int
 794 be_rootdn_bind( Operation *op, SlapReply *rs )
 795 {
 796         int             rc;
 797 #ifdef SLAPD_SPASSWD
 798         void    *old_authctx = NULL;
 799 #endif
 800
 801         assert( op->o_tag == LDAP_REQ_BIND );
 802         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 803
 804         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 805                 return SLAP_CB_CONTINUE;
 806         }
 807
 808         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 809                 /* give the database a chance */
 810                 return SLAP_CB_CONTINUE;
 811         }
 812
 813         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 814                 /* rootdn bind explicitly disallowed */
 815                 rc = LDAP_INVALID_CREDENTIALS;
 816                 if ( rs ) {
 817                         goto send_result;
 818                 }
 819
 820                 return rc;
 821         }
 822
 823 #ifdef SLAPD_SPASSWD
 824         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 825                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 826 #endif
 827
 828         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 829
 830 #ifdef SLAPD_SPASSWD
 831         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 832                 old_authctx, 0, NULL, NULL );
 833 #endif
 834
 835         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 836         if ( rs ) {
 837 send_result:;
 838                 rs->sr_err = rc;
 839
 840                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 841                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 842                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 843
 844                 if ( rc == LDAP_SUCCESS ) {
 845                         /* Set to the pretty rootdn */
 846                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 847
 848                 } else {
 849                         send_ldap_result( op, rs );
 850                 }
 851         }
 852
 853         return rc;
 854 }
 855
 856 int
 857 be_entry_release_rw(
 858         Operation *op,
 859         Entry *e,
 860         int rw )
 861 {
 862         if ( op->o_bd->be_release ) {
 863                 /* free and release entry from backend */
 864                 return op->o_bd->be_release( op, e, rw );
 865         } else {
 866                 /* free entry */
 867                 entry_free( e );
 868                 return 0;
 869         }
 870 }
 871
 872 int
 873 backend_unbind( Operation *op, SlapReply *rs )
 874 {
 875         BackendDB *be;
 876
 877         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 878                 if ( be->be_unbind ) {
 879                         op->o_bd = be;
 880                         be->be_unbind( op, rs );
 881                 }
 882         }
 883
 884         return 0;
 885 }
 886
 887 int
 888 backend_connection_init(
 889         Connection   *conn )
 890 {
 891         BackendDB *be;
 892
 893         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 894                 if ( be->be_connection_init ) {
 895                         be->be_connection_init( be, conn );
 896                 }
 897         }
 898
 899         return 0;
 900 }
 901
 902 int
 903 backend_connection_destroy(
 904         Connection   *conn )
 905 {
 906         BackendDB *be;
 907
 908         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 909                 if ( be->be_connection_destroy ) {
 910                         be->be_connection_destroy( be, conn);
 911                 }
 912         }
 913
 914         return 0;
 915 }
 916
 917 int
 918 backend_check_controls(
 919         Operation *op,
 920         SlapReply *rs )
 921 {
 922         LDAPControl **ctrls = op->o_ctrls;
 923         rs->sr_err = LDAP_SUCCESS;
 924
 925         if( ctrls ) {
 926                 for( ; *ctrls != NULL ; ctrls++ ) {
 927                         int cid;
 928
 929                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 930                         case LDAP_CONTROL_NOT_FOUND:
 931                                 /* unrecognized control */
 932                                 if ( (*ctrls)->ldctl_iscritical ) {
 933                                         /* should not be reachable */
 934                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 935                                                 "unrecognized critical control: %s\n",
 936                                                 (*ctrls)->ldctl_oid, 0, 0 );
 937                                         assert( 0 );
 938                                 } else {
 939                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 940                                                 "unrecognized non-critical control: %s\n",
 941                                                 (*ctrls)->ldctl_oid, 0, 0 );
 942                                 }
 943                                 break;
 944
 945                         case LDAP_COMPARE_FALSE:
 946                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 947 #ifdef SLAP_CONTROL_X_WHATFAILED
 948                                         if ( get_whatFailed( op ) ) {
 949                                                 char *oids[ 2 ] = { (*ctrls)->ldctl_oid, NULL };
 950                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 951                                         }
 952 #endif
 953                                         /* RFC 4511 allows unavailableCriticalExtension to be
 954                                          * returned when the server is unwilling to perform
 955                                          * an operation extended by a recognized critical
 956                                          * control.
 957                                          */
 958                                         rs->sr_text = "critical control unavailable in context";
 959                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 960                                         goto done;
 961                                 }
 962                                 break;
 963
 964                         case LDAP_COMPARE_TRUE:
 965                                 break;
 966
 967                         default:
 968                                 /* unreachable */
 969                                 Debug( LDAP_DEBUG_ANY,
 970                                         "backend_check_controls: unable to check control: %s\n",
 971                                         (*ctrls)->ldctl_oid, 0, 0 );
 972                                 assert( 0 );
 973
 974                                 rs->sr_text = "unable to check control";
 975                                 rs->sr_err = LDAP_OTHER;
 976                                 goto done;
 977                         }
 978                 }
 979         }
 980
 981 #if 0 /* temporarily removed */
 982         /* check should be generalized */
 983         if( get_relax(op) && !be_isroot(op)) {
 984                 rs->sr_text = "requires manager authorization";
 985                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 986         }
 987 #endif
 988
 989 done:;
 990         return rs->sr_err;
 991 }
 992
 993 int
 994 backend_check_restrictions(
 995         Operation *op,
 996         SlapReply *rs,
 997         struct berval *opdata )
 998 {
 999         slap_mask_t restrictops;
1000         slap_mask_t requires;
1001         slap_mask_t opflag;
1002         slap_mask_t exopflag = 0;
1003         slap_ssf_set_t *ssf;
1004         int updateop = 0;
1005         int starttls = 0;
1006         int session = 0;
1007
1008         if ( op->o_bd ) {
1009                 int     rc = SLAP_CB_CONTINUE;
1010
1011                 if ( op->o_bd->be_chk_controls ) {
1012                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1013                 }
1014
1015                 if ( rc == SLAP_CB_CONTINUE ) {
1016                         rc = backend_check_controls( op, rs );
1017                 }
1018
1019                 if ( rc != LDAP_SUCCESS ) {
1020                         return rs->sr_err;
1021                 }
1022
1023                 restrictops = op->o_bd->be_restrictops;
1024                 requires = op->o_bd->be_requires;
1025                 ssf = &op->o_bd->be_ssf_set;
1026
1027         } else {
1028                 restrictops = frontendDB->be_restrictops;
1029                 requires = frontendDB->be_requires;
1030                 ssf = &frontendDB->be_ssf_set;
1031         }
1032
1033         switch( op->o_tag ) {
1034         case LDAP_REQ_ADD:
1035                 opflag = SLAP_RESTRICT_OP_ADD;
1036                 updateop++;
1037                 break;
1038         case LDAP_REQ_BIND:
1039                 opflag = SLAP_RESTRICT_OP_BIND;
1040                 session++;
1041                 break;
1042         case LDAP_REQ_COMPARE:
1043                 opflag = SLAP_RESTRICT_OP_COMPARE;
1044                 break;
1045         case LDAP_REQ_DELETE:
1046                 updateop++;
1047                 opflag = SLAP_RESTRICT_OP_DELETE;
1048                 break;
1049         case LDAP_REQ_EXTENDED:
1050                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1051
1052                 if( !opdata ) {
1053                         /* treat unspecified as a modify */
1054                         opflag = SLAP_RESTRICT_OP_MODIFY;
1055                         updateop++;
1056                         break;
1057                 }
1058
1059                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1060                         session++;
1061                         starttls++;
1062                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1063                         break;
1064                 }
1065
1066                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1067                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1068                         break;
1069                 }
1070
1071                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1072                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1073                         break;
1074                 }
1075
1076                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1077                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1078                         updateop++;
1079                         break;
1080                 }
1081
1082                 /* treat everything else as a modify */
1083                 opflag = SLAP_RESTRICT_OP_MODIFY;
1084                 updateop++;
1085                 break;
1086
1087         case LDAP_REQ_MODIFY:
1088                 updateop++;
1089                 opflag = SLAP_RESTRICT_OP_MODIFY;
1090                 break;
1091         case LDAP_REQ_RENAME:
1092                 updateop++;
1093                 opflag = SLAP_RESTRICT_OP_RENAME;
1094                 break;
1095         case LDAP_REQ_SEARCH:
1096                 opflag = SLAP_RESTRICT_OP_SEARCH;
1097                 break;
1098         case LDAP_REQ_UNBIND:
1099                 session++;
1100                 opflag = 0;
1101                 break;
1102         default:
1103                 rs->sr_text = "restrict operations internal error";
1104                 rs->sr_err = LDAP_OTHER;
1105                 return rs->sr_err;
1106         }
1107
1108         if ( !starttls ) {
1109                 /* these checks don't apply to StartTLS */
1110
1111                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1112                 if( op->o_transport_ssf < ssf->sss_transport ) {
1113                         rs->sr_text = op->o_transport_ssf
1114                                 ? "stronger transport confidentiality required"
1115                                 : "transport confidentiality required";
1116                         return rs->sr_err;
1117                 }
1118
1119                 if( op->o_tls_ssf < ssf->sss_tls ) {
1120                         rs->sr_text = op->o_tls_ssf
1121                                 ? "stronger TLS confidentiality required"
1122                                 : "TLS confidentiality required";
1123                         return rs->sr_err;
1124                 }
1125
1126
1127                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1128                         /* simple bind specific check */
1129                         if( op->o_ssf < ssf->sss_simple_bind ) {
1130                                 rs->sr_text = op->o_ssf
1131                                         ? "stronger confidentiality required"
1132                                         : "confidentiality required";
1133                                 return rs->sr_err;
1134                         }
1135                 }
1136
1137                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1138                         /* these checks don't apply to SASL bind */
1139
1140                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1141                                 rs->sr_text = op->o_sasl_ssf
1142                                         ? "stronger SASL confidentiality required"
1143                                         : "SASL confidentiality required";
1144                                 return rs->sr_err;
1145                         }
1146
1147                         if( op->o_ssf < ssf->sss_ssf ) {
1148                                 rs->sr_text = op->o_ssf
1149                                         ? "stronger confidentiality required"
1150                                         : "confidentiality required";
1151                                 return rs->sr_err;
1152                         }
1153                 }
1154
1155                 if( updateop ) {
1156                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1157                                 rs->sr_text = op->o_transport_ssf
1158                                         ? "stronger transport confidentiality required for update"
1159                                         : "transport confidentiality required for update";
1160                                 return rs->sr_err;
1161                         }
1162
1163                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1164                                 rs->sr_text = op->o_tls_ssf
1165                                         ? "stronger TLS confidentiality required for update"
1166                                         : "TLS confidentiality required for update";
1167                                 return rs->sr_err;
1168                         }
1169
1170                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1171                                 rs->sr_text = op->o_sasl_ssf
1172                                         ? "stronger SASL confidentiality required for update"
1173                                         : "SASL confidentiality required for update";
1174                                 return rs->sr_err;
1175                         }
1176
1177                         if( op->o_ssf < ssf->sss_update_ssf ) {
1178                                 rs->sr_text = op->o_ssf
1179                                         ? "stronger confidentiality required for update"
1180                                         : "confidentiality required for update";
1181                                 return rs->sr_err;
1182                         }
1183
1184                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1185                                 BER_BVISEMPTY( &op->o_ndn ) )
1186                         {
1187                                 rs->sr_text = "modifications require authentication";
1188                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1189                                 return rs->sr_err;
1190                         }
1191
1192 #ifdef SLAP_X_LISTENER_MOD
1193                         if ( op->o_conn->c_listener &&
1194                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1195                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1196                         {
1197                                 /* no "w" mode means readonly */
1198                                 rs->sr_text = "modifications not allowed on this listener";
1199                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1200                                 return rs->sr_err;
1201                         }
1202 #endif /* SLAP_X_LISTENER_MOD */
1203                 }
1204         }
1205
1206         if ( !session ) {
1207                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1208
1209                 if( requires & SLAP_REQUIRE_STRONG ) {
1210                         /* should check mechanism */
1211                         if( ( op->o_transport_ssf < ssf->sss_transport
1212                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1213                                 || BER_BVISEMPTY( &op->o_dn ) )
1214                         {
1215                                 rs->sr_text = "strong(er) authentication required";
1216                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1217                                 return rs->sr_err;
1218                         }
1219                 }
1220
1221                 if( requires & SLAP_REQUIRE_SASL ) {
1222                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1223                                 rs->sr_text = "SASL authentication required";
1224                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1225                                 return rs->sr_err;
1226                         }
1227                 }
1228
1229                 if( requires & SLAP_REQUIRE_AUTHC ) {
1230                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1231                                 rs->sr_text = "authentication required";
1232                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1233                                 return rs->sr_err;
1234                         }
1235                 }
1236
1237                 if( requires & SLAP_REQUIRE_BIND ) {
1238                         int version;
1239                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1240                         version = op->o_conn->c_protocol;
1241                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1242
1243                         if( !version ) {
1244                                 /* no bind has occurred */
1245                                 rs->sr_text = "BIND required";
1246                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1247                                 return rs->sr_err;
1248                         }
1249                 }
1250
1251                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1252                         if( op->o_protocol < LDAP_VERSION3 ) {
1253                                 /* no bind has occurred */
1254                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1255                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1256                                 return rs->sr_err;
1257                         }
1258                 }
1259
1260 #ifdef SLAP_X_LISTENER_MOD
1261                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1262                         if ( op->o_conn->c_listener &&
1263                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1264                 {
1265                                 /* no "x" mode means bind required */
1266                                 rs->sr_text = "bind required on this listener";
1267                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1268                                 return rs->sr_err;
1269                         }
1270                 }
1271
1272                 if ( !starttls && !updateop ) {
1273                         if ( op->o_conn->c_listener &&
1274                                 !( op->o_conn->c_listener->sl_perms &
1275                                         ( !BER_BVISEMPTY( &op->o_dn )
1276                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1277                         {
1278                                 /* no "r" mode means no read */
1279                                 rs->sr_text = "read not allowed on this listener";
1280                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1281                                 return rs->sr_err;
1282                         }
1283                 }
1284 #endif /* SLAP_X_LISTENER_MOD */
1285
1286         }
1287
1288         if( ( restrictops & opflag )
1289                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1290                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1291                         rs->sr_text = "read operations restricted";
1292                 } else if ( restrictops & exopflag ) {
1293                         rs->sr_text = "extended operation restricted";
1294                 } else {
1295                         rs->sr_text = "operation restricted";
1296                 }
1297                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1298                 return rs->sr_err;
1299         }
1300
1301         rs->sr_err = LDAP_SUCCESS;
1302         return rs->sr_err;
1303 }
1304
1305 int backend_check_referrals( Operation *op, SlapReply *rs )
1306 {
1307         rs->sr_err = LDAP_SUCCESS;
1308
1309         if( op->o_bd->be_chk_referrals ) {
1310                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1311
1312                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1313                         send_ldap_result( op, rs );
1314                 }
1315         }
1316
1317         return rs->sr_err;
1318 }
1319
1320 int
1321 be_entry_get_rw(
1322         Operation *op,
1323         struct berval *ndn,
1324         ObjectClass *oc,
1325         AttributeDescription *at,
1326         int rw,
1327         Entry **e )
1328 {
1329         *e = NULL;
1330
1331         if ( op->o_bd == NULL ) {
1332                 return LDAP_NO_SUCH_OBJECT;
1333         }
1334
1335         if ( op->o_bd->be_fetch ) {
1336                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1337         }
1338
1339         return LDAP_UNWILLING_TO_PERFORM;
1340 }
1341
1342 int
1343 fe_acl_group(
1344         Operation *op,
1345         Entry   *target,
1346         struct berval *gr_ndn,
1347         struct berval *op_ndn,
1348         ObjectClass *group_oc,
1349         AttributeDescription *group_at )
1350 {
1351         Entry *e;
1352         void *o_priv = op->o_private, *e_priv = NULL;
1353         Attribute *a;
1354         int rc;
1355         GroupAssertion *g;
1356         Backend *be = op->o_bd;
1357         OpExtra         *oex;
1358
1359         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1360                 if ( oex->oe_key == (void *)backend_group )
1361                         break;
1362         }
1363
1364         if ( oex && ((OpExtraDB *)oex)->oe_db )
1365                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1366
1367         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1368                 op->o_bd = select_backend( gr_ndn, 0 );
1369
1370         for ( g = op->o_groups; g; g = g->ga_next ) {
1371                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1372                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1373                 {
1374                         continue;
1375                 }
1376                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1377                         break;
1378                 }
1379         }
1380
1381         if ( g ) {
1382                 rc = g->ga_res;
1383                 goto done;
1384         }
1385
1386         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1387                 e = target;
1388                 rc = 0;
1389
1390         } else {
1391                 op->o_private = NULL;
1392                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1393                 e_priv = op->o_private;
1394                 op->o_private = o_priv;
1395         }
1396
1397         if ( e ) {
1398                 a = attr_find( e->e_attrs, group_at );
1399                 if ( a ) {
1400                         /* If the attribute is a subtype of labeledURI,
1401                          * treat this as a dynamic group ala groupOfURLs
1402                          */
1403                         if ( is_at_subtype( group_at->ad_type,
1404                                 slap_schema.si_ad_labeledURI->ad_type ) )
1405                         {
1406                                 int i;
1407                                 LDAPURLDesc *ludp;
1408                                 struct berval bv, nbase;
1409                                 Filter *filter;
1410                                 Entry *user = NULL;
1411                                 void *user_priv = NULL;
1412                                 Backend *b2 = op->o_bd;
1413
1414                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1415                                         user = target;
1416                                 }
1417
1418                                 rc = LDAP_COMPARE_FALSE;
1419                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1420                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1421                                                 LDAP_URL_SUCCESS )
1422                                         {
1423                                                 continue;
1424                                         }
1425
1426                                         BER_BVZERO( &nbase );
1427
1428                                         /* host, attrs and extensions parts must be empty */
1429                                         if ( ( ludp->lud_host && *ludp->lud_host )
1430                                                 || ludp->lud_attrs
1431                                                 || ludp->lud_exts )
1432                                         {
1433                                                 goto loopit;
1434                                         }
1435
1436                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1437                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1438                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1439                                         {
1440                                                 goto loopit;
1441                                         }
1442
1443                                         switch ( ludp->lud_scope ) {
1444                                         case LDAP_SCOPE_BASE:
1445                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1446                                                         goto loopit;
1447                                                 }
1448                                                 break;
1449                                         case LDAP_SCOPE_ONELEVEL:
1450                                                 dnParent( op_ndn, &bv );
1451                                                 if ( !dn_match( &nbase, &bv ) ) {
1452                                                         goto loopit;
1453                                                 }
1454                                                 break;
1455                                         case LDAP_SCOPE_SUBTREE:
1456                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1457                                                         goto loopit;
1458                                                 }
1459                                                 break;
1460                                         case LDAP_SCOPE_SUBORDINATE:
1461                                                 if ( dn_match( &nbase, op_ndn ) ||
1462                                                         !dnIsSuffix( op_ndn, &nbase ) )
1463                                                 {
1464                                                         goto loopit;
1465                                                 }
1466                                         }
1467
1468                                         /* NOTE: this could be NULL
1469                                          * if no filter is provided,
1470                                          * or if filter parsing fails.
1471                                          * In the latter case,
1472                                          * we should give up. */
1473                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1474                                                 filter = str2filter_x( op, ludp->lud_filter );
1475                                                 if ( filter == NULL ) {
1476                                                         /* give up... */
1477                                                         rc = LDAP_OTHER;
1478                                                         goto loopit;
1479                                                 }
1480
1481                                                 /* only get user if required
1482                                                  * and not available yet */
1483                                                 if ( user == NULL ) {
1484                                                         int rc2;
1485
1486                                                         op->o_bd = select_backend( op_ndn, 0 );
1487                                                         op->o_private = NULL;
1488                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1489                                                         user_priv = op->o_private;
1490                                                         op->o_private = o_priv;
1491                                                         if ( rc2 != 0 ) {
1492                                                                 /* give up... */
1493                                                                 rc = LDAP_OTHER;
1494                                                                 goto loopit;
1495                                                         }
1496                                                 }
1497
1498                                                 if ( test_filter( NULL, user, filter ) ==
1499                                                         LDAP_COMPARE_TRUE )
1500                                                 {
1501                                                         rc = 0;
1502                                                 }
1503                                                 filter_free_x( op, filter, 1 );
1504                                         }
1505 loopit:
1506                                         ldap_free_urldesc( ludp );
1507                                         if ( !BER_BVISNULL( &nbase ) ) {
1508                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1509                                         }
1510                                         if ( rc != LDAP_COMPARE_FALSE ) {
1511                                                 break;
1512                                         }
1513                                 }
1514
1515                                 if ( user != NULL && user != target ) {
1516                                         op->o_private = user_priv;
1517                                         be_entry_release_r( op, user );
1518                                         op->o_private = o_priv;
1519                                 }
1520                                 op->o_bd = b2;
1521
1522                         } else {
1523                                 rc = attr_valfind( a,
1524                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1525                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1526                                         op_ndn, NULL, op->o_tmpmemctx );
1527                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1528                                         rc = LDAP_COMPARE_FALSE;
1529                                 }
1530                         }
1531
1532                 } else {
1533                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1534                 }
1535
1536                 if ( e != target ) {
1537                         op->o_private = e_priv;
1538                         be_entry_release_r( op, e );
1539                         op->o_private = o_priv;
1540                 }
1541
1542         } else {
1543                 rc = LDAP_NO_SUCH_OBJECT;
1544         }
1545
1546         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1547                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1548                         op->o_tmpmemctx );
1549                 g->ga_be = op->o_bd;
1550                 g->ga_oc = group_oc;
1551                 g->ga_at = group_at;
1552                 g->ga_res = rc;
1553                 g->ga_len = gr_ndn->bv_len;
1554                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1555                 g->ga_next = op->o_groups;
1556                 op->o_groups = g;
1557         }
1558
1559 done:
1560         op->o_bd = be;
1561         return rc;
1562 }
1563
1564 int
1565 backend_group(
1566         Operation *op,
1567         Entry   *target,
1568         struct berval *gr_ndn,
1569         struct berval *op_ndn,
1570         ObjectClass *group_oc,
1571         AttributeDescription *group_at )
1572 {
1573         int                     rc;
1574         BackendDB *be_orig;
1575         OpExtraDB       oex;
1576
1577         if ( op->o_abandon ) {
1578                 return SLAPD_ABANDON;
1579         }
1580
1581         oex.oe_db = op->o_bd;
1582         oex.oe.oe_key = (void *)backend_group;
1583         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1584
1585         be_orig = op->o_bd;
1586         op->o_bd = frontendDB;
1587         rc = frontendDB->be_group( op, target, gr_ndn,
1588                 op_ndn, group_oc, group_at );
1589         op->o_bd = be_orig;
1590         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1591
1592         return rc;
1593 }
1594
1595 int
1596 fe_acl_attribute(
1597         Operation *op,
1598         Entry   *target,
1599         struct berval   *edn,
1600         AttributeDescription *entry_at,
1601         BerVarray *vals,
1602         slap_access_t access )
1603 {
1604         Entry                   *e = NULL;
1605         void                    *o_priv = op->o_private, *e_priv = NULL;
1606         Attribute               *a = NULL;
1607         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1608         AccessControlState      acl_state = ACL_STATE_INIT;
1609         Backend                 *be = op->o_bd;
1610         OpExtra         *oex;
1611
1612         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1613                 if ( oex->oe_key == (void *)backend_attribute )
1614                         break;
1615         }
1616
1617         if ( oex && ((OpExtraDB *)oex)->oe_db )
1618                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1619
1620         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1621                 op->o_bd = select_backend( edn, 0 );
1622
1623         if ( target && dn_match( &target->e_nname, edn ) ) {
1624                 e = target;
1625
1626         } else {
1627                 op->o_private = NULL;
1628                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1629                 e_priv = op->o_private;
1630                 op->o_private = o_priv;
1631         }
1632
1633         if ( e ) {
1634                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1635                         assert( vals == NULL );
1636
1637                         rc = LDAP_SUCCESS;
1638                         if ( op->o_conn && access > ACL_NONE &&
1639                                 access_allowed( op, e, entry_at, NULL,
1640                                                 access, &acl_state ) == 0 )
1641                         {
1642                                 rc = LDAP_INSUFFICIENT_ACCESS;
1643                         }
1644                         goto freeit;
1645                 }
1646
1647                 a = attr_find( e->e_attrs, entry_at );
1648                 if ( a == NULL ) {
1649                         SlapReply       rs = { 0 };
1650                         AttributeName   anlist[ 2 ];
1651
1652                         anlist[ 0 ].an_name = entry_at->ad_cname;
1653                         anlist[ 0 ].an_desc = entry_at;
1654                         BER_BVZERO( &anlist[ 1 ].an_name );
1655                         rs.sr_attrs = anlist;
1656
1657                         /* NOTE: backend_operational() is also called
1658                          * when returning results, so it's supposed
1659                          * to do no harm to entries */
1660                         rs.sr_entry = e;
1661                         rc = backend_operational( op, &rs );
1662                         rs.sr_entry = NULL;
1663
1664                         if ( rc == LDAP_SUCCESS ) {
1665                                 if ( rs.sr_operational_attrs ) {
1666                                         freeattr = 1;
1667                                         a = rs.sr_operational_attrs;
1668
1669                                 } else {
1670                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1671                                 }
1672                         }
1673                 }
1674
1675                 if ( a ) {
1676                         BerVarray v;
1677
1678                         if ( op->o_conn && access > ACL_NONE &&
1679                                 access_allowed( op, e, entry_at, NULL,
1680                                                 access, &acl_state ) == 0 )
1681                         {
1682                                 rc = LDAP_INSUFFICIENT_ACCESS;
1683                                 goto freeit;
1684                         }
1685
1686                         i = a->a_numvals;
1687                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1688                                 op->o_tmpmemctx );
1689                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1690                         {
1691                                 if ( op->o_conn && access > ACL_NONE &&
1692                                         access_allowed( op, e, entry_at,
1693                                                         &a->a_nvals[i],
1694                                                         access,
1695                                                         &acl_state ) == 0 )
1696                                 {
1697                                         continue;
1698                                 }
1699                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1700                                                 op->o_tmpmemctx );
1701                                 if ( !BER_BVISNULL( &v[j] ) ) {
1702                                         j++;
1703                                 }
1704                         }
1705                         if ( j == 0 ) {
1706                                 op->o_tmpfree( v, op->o_tmpmemctx );
1707                                 *vals = NULL;
1708                                 rc = LDAP_INSUFFICIENT_ACCESS;
1709
1710                         } else {
1711                                 BER_BVZERO( &v[j] );
1712                                 *vals = v;
1713                                 rc = LDAP_SUCCESS;
1714                         }
1715                 }
1716 freeit:         if ( e != target ) {
1717                         op->o_private = e_priv;
1718                         be_entry_release_r( op, e );
1719                         op->o_private = o_priv;
1720                 }
1721                 if ( freeattr ) {
1722                         attr_free( a );
1723                 }
1724         }
1725
1726         op->o_bd = be;
1727         return rc;
1728 }
1729
1730 int
1731 backend_attribute(
1732         Operation *op,
1733         Entry   *target,
1734         struct berval   *edn,
1735         AttributeDescription *entry_at,
1736         BerVarray *vals,
1737         slap_access_t access )
1738 {
1739         int                     rc;
1740         BackendDB *be_orig;
1741         OpExtraDB       oex;
1742
1743         oex.oe_db = op->o_bd;
1744         oex.oe.oe_key = (void *)backend_attribute;
1745         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1746
1747         be_orig = op->o_bd;
1748         op->o_bd = frontendDB;
1749         rc = frontendDB->be_attribute( op, target, edn,
1750                 entry_at, vals, access );
1751         op->o_bd = be_orig;
1752         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1753
1754         return rc;
1755 }
1756
1757 int
1758 backend_access(
1759         Operation               *op,
1760         Entry                   *target,
1761         struct berval           *edn,
1762         AttributeDescription    *entry_at,
1763         struct berval           *nval,
1764         slap_access_t           access,
1765         slap_mask_t             *mask )
1766 {
1767         Entry           *e = NULL;
1768         void            *o_priv = op->o_private, *e_priv = NULL;
1769         int             rc = LDAP_INSUFFICIENT_ACCESS;
1770         Backend         *be = op->o_bd;
1771
1772         /* pedantic */
1773         assert( op != NULL );
1774         assert( op->o_conn != NULL );
1775         assert( edn != NULL );
1776         assert( access > ACL_NONE );
1777
1778         if ( !op->o_bd ) {
1779                 op->o_bd = select_backend( edn, 0 );
1780         }
1781
1782         if ( target && dn_match( &target->e_nname, edn ) ) {
1783                 e = target;
1784
1785         } else {
1786                 op->o_private = NULL;
1787                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1788                 e_priv = op->o_private;
1789                 op->o_private = o_priv;
1790         }
1791
1792         if ( e ) {
1793                 Attribute       *a = NULL;
1794                 int             freeattr = 0;
1795
1796                 if ( entry_at == NULL ) {
1797                         entry_at = slap_schema.si_ad_entry;
1798                 }
1799
1800                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1801                 {
1802                         if ( access_allowed_mask( op, e, entry_at,
1803                                         NULL, access, NULL, mask ) == 0 )
1804                         {
1805                                 rc = LDAP_INSUFFICIENT_ACCESS;
1806
1807                         } else {
1808                                 rc = LDAP_SUCCESS;
1809                         }
1810
1811                 } else {
1812                         a = attr_find( e->e_attrs, entry_at );
1813                         if ( a == NULL ) {
1814                                 SlapReply       rs = { 0 };
1815                                 AttributeName   anlist[ 2 ];
1816
1817                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1818                                 anlist[ 0 ].an_desc = entry_at;
1819                                 BER_BVZERO( &anlist[ 1 ].an_name );
1820                                 rs.sr_attrs = anlist;
1821
1822                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1823
1824                                 /* NOTE: backend_operational() is also called
1825                                  * when returning results, so it's supposed
1826                                  * to do no harm to entries */
1827                                 rs.sr_entry = e;
1828                                 rc = backend_operational( op, &rs );
1829                                 rs.sr_entry = NULL;
1830
1831                                 if ( rc == LDAP_SUCCESS ) {
1832                                         if ( rs.sr_operational_attrs ) {
1833                                                 freeattr = 1;
1834                                                 a = rs.sr_operational_attrs;
1835
1836                                         } else {
1837                                                 rc = LDAP_NO_SUCH_OBJECT;
1838                                         }
1839                                 }
1840                         }
1841
1842                         if ( a ) {
1843                                 if ( access_allowed_mask( op, e, entry_at,
1844                                                 nval, access, NULL, mask ) == 0 )
1845                                 {
1846                                         rc = LDAP_INSUFFICIENT_ACCESS;
1847                                         goto freeit;
1848                                 }
1849                                 rc = LDAP_SUCCESS;
1850                         }
1851                 }
1852 freeit:         if ( e != target ) {
1853                         op->o_private = e_priv;
1854                         be_entry_release_r( op, e );
1855                         op->o_private = o_priv;
1856                 }
1857                 if ( freeattr ) {
1858                         attr_free( a );
1859                 }
1860         }
1861
1862         op->o_bd = be;
1863         return rc;
1864 }
1865
1866 int
1867 fe_aux_operational(
1868         Operation *op,
1869         SlapReply *rs )
1870 {
1871         Attribute               **ap;
1872         int                     rc = LDAP_SUCCESS;
1873         BackendDB               *be_orig = op->o_bd;
1874         OpExtra         *oex;
1875
1876         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1877                 if ( oex->oe_key == (void *)backend_operational )
1878                         break;
1879         }
1880
1881         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1882                 /* just count them */ ;
1883
1884         /*
1885          * If operational attributes (allegedly) are required,
1886          * and the backend supports specific operational attributes,
1887          * add them to the attribute list
1888          */
1889         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1890                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1891                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1892         {
1893                 *ap = slap_operational_entryDN( rs->sr_entry );
1894                 ap = &(*ap)->a_next;
1895         }
1896
1897         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1898                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1899                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1900         {
1901                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1902                 ap = &(*ap)->a_next;
1903         }
1904
1905         /* Let the overlays have a chance at this */
1906         if ( oex && ((OpExtraDB *)oex)->oe_db )
1907                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1908
1909         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1910                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1911
1912         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1913                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1914                 op->o_bd->be_operational != NULL )
1915         {
1916                 rc = op->o_bd->be_operational( op, rs );
1917         }
1918         op->o_bd = be_orig;
1919
1920         return rc;
1921 }
1922
1923 int backend_operational( Operation *op, SlapReply *rs )
1924 {
1925         int rc;
1926         BackendDB *be_orig;
1927         OpExtraDB       oex;
1928
1929         oex.oe_db = op->o_bd;
1930         oex.oe.oe_key = (void *)backend_operational;
1931         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1932
1933         /* Moved this into the frontend so global overlays are called */
1934
1935         be_orig = op->o_bd;
1936         op->o_bd = frontendDB;
1937         rc = frontendDB->be_operational( op, rs );
1938         op->o_bd = be_orig;
1939         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1940
1941         return rc;
1942 }
1943