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 1998-2013 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                         char *type = be->bd_info->bi_type;
 230                         char *suffix = "(null)";
 231
 232                         if ( overlay_is_over( be ) ) {
 233                                 slap_overinfo   *oi = (slap_overinfo *)be->bd_info->bi_private;
 234                                 type = oi->oi_orig->bi_type;
 235                         }
 236
 237                         if ( be->be_suffix != NULL && !BER_BVISNULL( &be->be_suffix[0] ) ) {
 238                                 suffix = be->be_suffix[0].bv_val;
 239                         }
 240
 241                         Debug( LDAP_DEBUG_ANY,
 242                                 "backend_startup_one (type=%s, suffix=\"%s\"): "
 243                                 "bi_db_open failed! (%d)\n",
 244                                 type, suffix, rc );
 245                 }
 246         }
 247
 248         return rc;
 249 }
 250
 251 int backend_startup(Backend *be)
 252 {
 253         int i;
 254         int rc = 0;
 255         BackendInfo *bi;
 256         ConfigReply cr={0, ""};
 257
 258         if( ! ( nBackendDB > 0 ) ) {
 259                 /* no databases */
 260                 Debug( LDAP_DEBUG_ANY,
 261                         "backend_startup: %d databases to startup.\n",
 262                         nBackendDB, 0, 0 );
 263                 return 1;
 264         }
 265
 266         if(be != NULL) {
 267                 /* silent noop if disabled */
 268                 if ( SLAP_DBDISABLED( be ))
 269                         return 0;
 270                 if ( be->bd_info->bi_open ) {
 271                         rc = be->bd_info->bi_open( be->bd_info );
 272                         if ( rc != 0 ) {
 273                                 Debug( LDAP_DEBUG_ANY,
 274                                         "backend_startup: bi_open failed!\n",
 275                                         0, 0, 0 );
 276
 277                                 return rc;
 278                         }
 279                 }
 280
 281                 return backend_startup_one( be, &cr );
 282         }
 283
 284         /* open frontend, if required */
 285         if ( frontendDB->bd_info->bi_db_open ) {
 286                 rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr );
 287                 if ( rc != 0 ) {
 288                         Debug( LDAP_DEBUG_ANY,
 289                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 290                                 rc, 0, 0 );
 291                         return rc;
 292                 }
 293         }
 294
 295         /* open each backend type */
 296         i = -1;
 297         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 298                 i++;
 299                 if( bi->bi_nDB == 0) {
 300                         /* no database of this type, don't open */
 301                         continue;
 302                 }
 303
 304                 if( bi->bi_open ) {
 305                         rc = bi->bi_open( bi );
 306                         if ( rc != 0 ) {
 307                                 Debug( LDAP_DEBUG_ANY,
 308                                         "backend_startup: bi_open %d (%s) failed!\n",
 309                                         i, bi->bi_type, 0 );
 310                                 return rc;
 311                         }
 312                 }
 313
 314                 (void)backend_init_controls( bi );
 315         }
 316
 317         /* open each backend database */
 318         i = -1;
 319         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 320                 i++;
 321                 if ( SLAP_DBDISABLED( be ))
 322                         continue;
 323                 if ( be->be_suffix == NULL ) {
 324                         Debug( LDAP_DEBUG_ANY,
 325                                 "backend_startup: warning, database %d (%s) "
 326                                 "has no suffix\n",
 327                                 i, be->bd_info->bi_type, 0 );
 328                 }
 329
 330                 rc = backend_startup_one( be, &cr );
 331
 332                 if ( rc ) return rc;
 333         }
 334
 335         return rc;
 336 }
 337
 338 int backend_num( Backend *be )
 339 {
 340         int i = 0;
 341         BackendDB *b2;
 342
 343         if( be == NULL ) return -1;
 344
 345         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 346                 if( be == b2 ) return i;
 347                 i++;
 348         }
 349         return -1;
 350 }
 351
 352 int backend_shutdown( Backend *be )
 353 {
 354         int rc = 0;
 355         BackendInfo *bi;
 356
 357         if( be != NULL ) {
 358                 /* shutdown a specific backend database */
 359
 360                 if ( be->bd_info->bi_nDB == 0 ) {
 361                         /* no database of this type, we never opened it */
 362                         return 0;
 363                 }
 364
 365                 if ( be->bd_info->bi_db_close ) {
 366                         rc = be->bd_info->bi_db_close( be, NULL );
 367                         if ( rc ) return rc;
 368                 }
 369
 370                 if( be->bd_info->bi_close ) {
 371                         rc = be->bd_info->bi_close( be->bd_info );
 372                         if ( rc ) return rc;
 373                 }
 374
 375                 return 0;
 376         }
 377
 378         /* close each backend database */
 379         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 380                 if ( SLAP_DBDISABLED( be ))
 381                         continue;
 382                 if ( be->bd_info->bi_db_close ) {
 383                         be->bd_info->bi_db_close( be, NULL );
 384                 }
 385
 386                 if(rc != 0) {
 387                         Debug( LDAP_DEBUG_ANY,
 388                                 "backend_close: bi_db_close %s failed!\n",
 389                                 be->be_type, 0, 0 );
 390                 }
 391         }
 392
 393         /* close each backend type */
 394         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 395                 if( bi->bi_nDB == 0 ) {
 396                         /* no database of this type */
 397                         continue;
 398                 }
 399
 400                 if( bi->bi_close ) {
 401                         bi->bi_close( bi );
 402                 }
 403         }
 404
 405         /* close frontend, if required */
 406         if ( frontendDB->bd_info->bi_db_close ) {
 407                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 408                 if ( rc != 0 ) {
 409                         Debug( LDAP_DEBUG_ANY,
 410                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 411                                 rc, 0, 0 );
 412                 }
 413         }
 414
 415         return 0;
 416 }
 417
 418 /*
 419  * This function is supposed to be the exact counterpart
 420  * of backend_startup_one(), although this one calls bi_db_destroy()
 421  * while backend_startup_one() calls bi_db_open().
 422  *
 423  * Make sure backend_stopdown_one() destroys resources allocated
 424  * by backend_startup_one(); only call backend_destroy_one() when
 425  * all stuff in a BackendDB needs to be destroyed
 426  */
 427 void
 428 backend_stopdown_one( BackendDB *bd )
 429 {
 430         if ( bd->be_pending_csn_list ) {
 431                 struct slap_csn_entry *csne;
 432                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 433                 while ( csne ) {
 434                         struct slap_csn_entry *tmp_csne = csne;
 435
 436                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 437                         ch_free( csne->ce_csn.bv_val );
 438                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 439                         ch_free( tmp_csne );
 440                 }
 441                 ch_free( bd->be_pending_csn_list );
 442         }
 443
 444         if ( bd->bd_info->bi_db_destroy ) {
 445                 bd->bd_info->bi_db_destroy( bd, NULL );
 446         }
 447 }
 448
 449 void backend_destroy_one( BackendDB *bd, int dynamic )
 450 {
 451         if ( dynamic ) {
 452                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 453         }
 454
 455         if ( bd->be_syncinfo ) {
 456                 syncinfo_free( bd->be_syncinfo, 1 );
 457         }
 458
 459         backend_stopdown_one( bd );
 460
 461         ber_bvarray_free( bd->be_suffix );
 462         ber_bvarray_free( bd->be_nsuffix );
 463         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 464                 free( bd->be_rootdn.bv_val );
 465         }
 466         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 467                 free( bd->be_rootndn.bv_val );
 468         }
 469         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 470                 free( bd->be_rootpw.bv_val );
 471         }
 472         acl_destroy( bd->be_acl );
 473         limits_destroy( bd->be_limits );
 474         if ( bd->be_extra_anlist ) {
 475                 anlist_free( bd->be_extra_anlist, 1, NULL );
 476         }
 477         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 478                 ch_free( bd->be_update_ndn.bv_val );
 479         }
 480         if ( bd->be_update_refs ) {
 481                 ber_bvarray_free( bd->be_update_refs );
 482         }
 483
 484         ldap_pvt_thread_mutex_destroy( &bd->be_pcl_mutex );
 485
 486         if ( dynamic ) {
 487                 free( bd );
 488         }
 489 }
 490
 491 int backend_destroy(void)
 492 {
 493         BackendDB *bd;
 494         BackendInfo *bi;
 495
 496         /* destroy each backend database */
 497         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 498                 backend_destroy_one( bd, 1 );
 499         }
 500
 501         /* destroy each backend type */
 502         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 503                 if( bi->bi_destroy ) {
 504                         bi->bi_destroy( bi );
 505                 }
 506         }
 507
 508         nBackendInfo = 0;
 509         LDAP_STAILQ_INIT(&backendInfo);
 510
 511         /* destroy frontend database */
 512         bd = frontendDB;
 513         if ( bd ) {
 514                 if ( bd->bd_info->bi_db_destroy ) {
 515                         bd->bd_info->bi_db_destroy( bd, NULL );
 516                 }
 517                 ber_bvarray_free( bd->be_suffix );
 518                 ber_bvarray_free( bd->be_nsuffix );
 519                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 520                         free( bd->be_rootdn.bv_val );
 521                 }
 522                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 523                         free( bd->be_rootndn.bv_val );
 524                 }
 525                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 526                         free( bd->be_rootpw.bv_val );
 527                 }
 528                 acl_destroy( bd->be_acl );
 529                 frontendDB = NULL;
 530         }
 531
 532         return 0;
 533 }
 534
 535 BackendInfo* backend_info(const char *type)
 536 {
 537         BackendInfo *bi;
 538
 539         /* search for the backend type */
 540         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 541                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 542                         return bi;
 543                 }
 544         }
 545
 546         return NULL;
 547 }
 548
 549 void
 550 backend_db_insert(
 551         BackendDB *be,
 552         int idx
 553 )
 554 {
 555         /* If idx < 0, just add to end of list */
 556         if ( idx < 0 ) {
 557                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 558         } else if ( idx == 0 ) {
 559                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 560         } else {
 561                 int i;
 562                 BackendDB *b2;
 563
 564                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 565                 idx--;
 566                 for (i=0; i<idx; i++) {
 567                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 568                 }
 569                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 570         }
 571 }
 572
 573 void
 574 backend_db_move(
 575         BackendDB *be,
 576         int idx
 577 )
 578 {
 579         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 580         backend_db_insert(be, idx);
 581 }
 582
 583 BackendDB *
 584 backend_db_init(
 585     const char  *type,
 586         BackendDB *b0,
 587         int idx,
 588         ConfigReply *cr)
 589 {
 590         BackendInfo *bi = backend_info(type);
 591         BackendDB *be = b0;
 592         int     rc = 0;
 593
 594         if( bi == NULL ) {
 595                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 596                 return NULL;
 597         }
 598
 599         /* If be is provided, treat it as private. Otherwise allocate
 600          * one and add it to the global list.
 601          */
 602         if ( !be ) {
 603                 be = ch_calloc( 1, sizeof(Backend) );
 604                 /* Just append */
 605                 if ( idx >= nbackends )
 606                         idx = -1;
 607                 nbackends++;
 608                 backend_db_insert( be, idx );
 609         }
 610
 611         be->bd_info = bi;
 612         be->bd_self = be;
 613
 614         be->be_def_limit = frontendDB->be_def_limit;
 615         be->be_dfltaccess = frontendDB->be_dfltaccess;
 616
 617         be->be_restrictops = frontendDB->be_restrictops;
 618         be->be_requires = frontendDB->be_requires;
 619         be->be_ssf_set = frontendDB->be_ssf_set;
 620
 621         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 622
 623         /* assign a default depth limit for alias deref */
 624         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 625
 626         if ( bi->bi_db_init ) {
 627                 rc = bi->bi_db_init( be, cr );
 628         }
 629
 630         if ( rc != 0 ) {
 631                 fprintf( stderr, "database init failed (%s)\n", type );
 632                 /* If we created and linked this be, remove it and free it */
 633                 if ( !b0 ) {
 634                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 635                         ldap_pvt_thread_mutex_destroy( &be->be_pcl_mutex );
 636                         ch_free( be );
 637                         be = NULL;
 638                         nbackends--;
 639                 }
 640         } else {
 641                 if ( !bi->bi_nDB ) {
 642                         backend_init_controls( bi );
 643                 }
 644                 bi->bi_nDB++;
 645         }
 646         return( be );
 647 }
 648
 649 void
 650 be_db_close( void )
 651 {
 652         BackendDB *be;
 653
 654         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 655                 if ( be->bd_info->bi_db_close ) {
 656                         be->bd_info->bi_db_close( be, NULL );
 657                 }
 658         }
 659
 660         if ( frontendDB->bd_info->bi_db_close ) {
 661                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 662         }
 663
 664 }
 665
 666 Backend *
 667 select_backend(
 668         struct berval * dn,
 669         int noSubs )
 670 {
 671         int             j;
 672         ber_len_t       len, dnlen = dn->bv_len;
 673         Backend         *be;
 674
 675         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 676                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be ) || SLAP_DBDISABLED( be )) {
 677                         continue;
 678                 }
 679
 680                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 681                 {
 682                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 683                         {
 684                                 continue;
 685                         }
 686
 687                         len = be->be_nsuffix[j].bv_len;
 688
 689                         if ( len > dnlen ) {
 690                                 /* suffix is longer than DN */
 691                                 continue;
 692                         }
 693
 694                         /*
 695                          * input DN is normalized, so the separator check
 696                          * need not look at escaping
 697                          */
 698                         if ( len && len < dnlen &&
 699                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 700                         {
 701                                 continue;
 702                         }
 703
 704                         if ( strcmp( be->be_nsuffix[j].bv_val,
 705                                 &dn->bv_val[dnlen-len] ) == 0 )
 706                         {
 707                                 return be;
 708                         }
 709                 }
 710         }
 711
 712         return be;
 713 }
 714
 715 int
 716 be_issuffix(
 717     Backend *be,
 718     struct berval *bvsuffix )
 719 {
 720         int     i;
 721
 722         if ( be->be_nsuffix == NULL ) {
 723                 return 0;
 724         }
 725
 726         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 727                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 728                         return 1;
 729                 }
 730         }
 731
 732         return 0;
 733 }
 734
 735 int
 736 be_issubordinate(
 737     Backend *be,
 738     struct berval *bvsubordinate )
 739 {
 740         int     i;
 741
 742         if ( be->be_nsuffix == NULL ) {
 743                 return 0;
 744         }
 745
 746         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 747                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 748                         return 1;
 749                 }
 750         }
 751
 752         return 0;
 753 }
 754
 755 int
 756 be_isroot_dn( Backend *be, struct berval *ndn )
 757 {
 758         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 759                 return 0;
 760         }
 761
 762         return dn_match( &be->be_rootndn, ndn );
 763 }
 764
 765 int
 766 be_slurp_update( Operation *op )
 767 {
 768         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 769                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 770 }
 771
 772 int
 773 be_shadow_update( Operation *op )
 774 {
 775         /* This assumes that all internal ops (connid <= -1000) on a syncrepl
 776          * database are syncrepl operations.
 777          */
 778         return ( ( SLAP_SYNC_SHADOW( op->o_bd ) && SLAPD_SYNC_IS_SYNCCONN( op->o_connid ) ) ||
 779                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 780 }
 781
 782 int
 783 be_isupdate_dn( Backend *be, struct berval *ndn )
 784 {
 785         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 786                 return 0;
 787         }
 788
 789         return dn_match( &be->be_update_ndn, ndn );
 790 }
 791
 792 struct berval *
 793 be_root_dn( Backend *be )
 794 {
 795         return &be->be_rootdn;
 796 }
 797
 798 int
 799 be_isroot( Operation *op )
 800 {
 801         return be_isroot_dn( op->o_bd, &op->o_ndn );
 802 }
 803
 804 int
 805 be_isroot_pw( Operation *op )
 806 {
 807         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 808 }
 809
 810 /*
 811  * checks if binding as rootdn
 812  *
 813  * return value:
 814  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 815  *      LDAP_SUCCESS                    if rootdn & rootpw
 816  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 817  *
 818  * if rs != NULL
 819  *      if LDAP_SUCCESS, op->orb_edn is set
 820  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 821  */
 822 int
 823 be_rootdn_bind( Operation *op, SlapReply *rs )
 824 {
 825         int             rc;
 826 #ifdef SLAPD_SPASSWD
 827         void    *old_authctx = NULL;
 828 #endif
 829
 830         assert( op->o_tag == LDAP_REQ_BIND );
 831         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 832
 833         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 834                 return SLAP_CB_CONTINUE;
 835         }
 836
 837         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 838                 /* give the database a chance */
 839                 return SLAP_CB_CONTINUE;
 840         }
 841
 842         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 843                 /* rootdn bind explicitly disallowed */
 844                 rc = LDAP_INVALID_CREDENTIALS;
 845                 if ( rs ) {
 846                         goto send_result;
 847                 }
 848
 849                 return rc;
 850         }
 851
 852 #ifdef SLAPD_SPASSWD
 853         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 854                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 855 #endif
 856
 857         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 858
 859 #ifdef SLAPD_SPASSWD
 860         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 861                 old_authctx, 0, NULL, NULL );
 862 #endif
 863
 864         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 865         if ( rs ) {
 866 send_result:;
 867                 rs->sr_err = rc;
 868
 869                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 870                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 871                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 872
 873                 if ( rc == LDAP_SUCCESS ) {
 874                         /* Set to the pretty rootdn */
 875                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 876
 877                 } else {
 878                         send_ldap_result( op, rs );
 879                 }
 880         }
 881
 882         return rc;
 883 }
 884
 885 int
 886 be_entry_release_rw(
 887         Operation *op,
 888         Entry *e,
 889         int rw )
 890 {
 891         if ( op->o_bd->be_release ) {
 892                 /* free and release entry from backend */
 893                 return op->o_bd->be_release( op, e, rw );
 894         } else {
 895                 /* free entry */
 896                 entry_free( e );
 897                 return 0;
 898         }
 899 }
 900
 901 int
 902 backend_unbind( Operation *op, SlapReply *rs )
 903 {
 904         BackendDB *be;
 905
 906         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 907                 if ( be->be_unbind ) {
 908                         op->o_bd = be;
 909                         be->be_unbind( op, rs );
 910                 }
 911         }
 912
 913         return 0;
 914 }
 915
 916 int
 917 backend_connection_init(
 918         Connection   *conn )
 919 {
 920         BackendDB *be;
 921
 922         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 923                 if ( be->be_connection_init ) {
 924                         be->be_connection_init( be, conn );
 925                 }
 926         }
 927
 928         return 0;
 929 }
 930
 931 int
 932 backend_connection_destroy(
 933         Connection   *conn )
 934 {
 935         BackendDB *be;
 936
 937         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 938                 if ( be->be_connection_destroy ) {
 939                         be->be_connection_destroy( be, conn);
 940                 }
 941         }
 942
 943         return 0;
 944 }
 945
 946 int
 947 backend_check_controls(
 948         Operation *op,
 949         SlapReply *rs )
 950 {
 951         LDAPControl **ctrls = op->o_ctrls;
 952         rs->sr_err = LDAP_SUCCESS;
 953
 954         if( ctrls ) {
 955                 for( ; *ctrls != NULL ; ctrls++ ) {
 956                         int cid;
 957
 958                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 959                         case LDAP_CONTROL_NOT_FOUND:
 960                                 /* unrecognized control */
 961                                 if ( (*ctrls)->ldctl_iscritical ) {
 962                                         /* should not be reachable */
 963                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 964                                                 "unrecognized critical control: %s\n",
 965                                                 (*ctrls)->ldctl_oid, 0, 0 );
 966                                         assert( 0 );
 967                                 } else {
 968                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 969                                                 "unrecognized non-critical control: %s\n",
 970                                                 (*ctrls)->ldctl_oid, 0, 0 );
 971                                 }
 972                                 break;
 973
 974                         case LDAP_COMPARE_FALSE:
 975                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 976 #ifdef SLAP_CONTROL_X_WHATFAILED
 977                                         if ( get_whatFailed( op ) ) {
 978                                                 char *oids[ 2 ];
 979                                                 oids[ 0 ] = (*ctrls)->ldctl_oid;
 980                                                 oids[ 1 ] = NULL;
 981                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 982                                         }
 983 #endif
 984                                         /* RFC 4511 allows unavailableCriticalExtension to be
 985                                          * returned when the server is unwilling to perform
 986                                          * an operation extended by a recognized critical
 987                                          * control.
 988                                          */
 989                                         rs->sr_text = "critical control unavailable in context";
 990                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 991                                         goto done;
 992                                 }
 993                                 break;
 994
 995                         case LDAP_COMPARE_TRUE:
 996                                 break;
 997
 998                         default:
 999                                 /* unreachable */
1000                                 Debug( LDAP_DEBUG_ANY,
1001                                         "backend_check_controls: unable to check control: %s\n",
1002                                         (*ctrls)->ldctl_oid, 0, 0 );
1003                                 assert( 0 );
1004
1005                                 rs->sr_text = "unable to check control";
1006                                 rs->sr_err = LDAP_OTHER;
1007                                 goto done;
1008                         }
1009                 }
1010         }
1011
1012 #if 0 /* temporarily removed */
1013         /* check should be generalized */
1014         if( get_relax(op) && !be_isroot(op)) {
1015                 rs->sr_text = "requires manager authorization";
1016                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1017         }
1018 #endif
1019
1020 done:;
1021         return rs->sr_err;
1022 }
1023
1024 int
1025 backend_check_restrictions(
1026         Operation *op,
1027         SlapReply *rs,
1028         struct berval *opdata )
1029 {
1030         slap_mask_t restrictops;
1031         slap_mask_t requires;
1032         slap_mask_t opflag;
1033         slap_mask_t exopflag = 0;
1034         slap_ssf_set_t ssfs, *ssf;
1035         int updateop = 0;
1036         int starttls = 0;
1037         int session = 0;
1038
1039         restrictops = frontendDB->be_restrictops;
1040         requires = frontendDB->be_requires;
1041         ssfs = frontendDB->be_ssf_set;
1042         ssf = &ssfs;
1043
1044         if ( op->o_bd ) {
1045                 slap_ssf_t *fssf, *bssf;
1046                 int     rc = SLAP_CB_CONTINUE, i;
1047
1048                 if ( op->o_bd->be_chk_controls ) {
1049                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1050                 }
1051
1052                 if ( rc == SLAP_CB_CONTINUE ) {
1053                         rc = backend_check_controls( op, rs );
1054                 }
1055
1056                 if ( rc != LDAP_SUCCESS ) {
1057                         return rs->sr_err;
1058                 }
1059
1060                 restrictops |= op->o_bd->be_restrictops;
1061                 requires |= op->o_bd->be_requires;
1062                 bssf = &op->o_bd->be_ssf_set.sss_ssf;
1063                 fssf = &ssfs.sss_ssf;
1064                 for ( i=0; i < (int)(sizeof(ssfs)/sizeof(slap_ssf_t)); i++ ) {
1065                         if ( bssf[i] ) fssf[i] = bssf[i];
1066                 }
1067         }
1068
1069         switch( op->o_tag ) {
1070         case LDAP_REQ_ADD:
1071                 opflag = SLAP_RESTRICT_OP_ADD;
1072                 updateop++;
1073                 break;
1074         case LDAP_REQ_BIND:
1075                 opflag = SLAP_RESTRICT_OP_BIND;
1076                 session++;
1077                 break;
1078         case LDAP_REQ_COMPARE:
1079                 opflag = SLAP_RESTRICT_OP_COMPARE;
1080                 break;
1081         case LDAP_REQ_DELETE:
1082                 updateop++;
1083                 opflag = SLAP_RESTRICT_OP_DELETE;
1084                 break;
1085         case LDAP_REQ_EXTENDED:
1086                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1087
1088                 if( !opdata ) {
1089                         /* treat unspecified as a modify */
1090                         opflag = SLAP_RESTRICT_OP_MODIFY;
1091                         updateop++;
1092                         break;
1093                 }
1094
1095                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1096                         session++;
1097                         starttls++;
1098                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1099                         break;
1100                 }
1101
1102                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1103                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1104                         break;
1105                 }
1106
1107                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1108                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1109                         break;
1110                 }
1111
1112                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1113                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1114                         updateop++;
1115                         break;
1116                 }
1117
1118                 /* treat everything else as a modify */
1119                 opflag = SLAP_RESTRICT_OP_MODIFY;
1120                 updateop++;
1121                 break;
1122
1123         case LDAP_REQ_MODIFY:
1124                 updateop++;
1125                 opflag = SLAP_RESTRICT_OP_MODIFY;
1126                 break;
1127         case LDAP_REQ_RENAME:
1128                 updateop++;
1129                 opflag = SLAP_RESTRICT_OP_RENAME;
1130                 break;
1131         case LDAP_REQ_SEARCH:
1132                 opflag = SLAP_RESTRICT_OP_SEARCH;
1133                 break;
1134         case LDAP_REQ_UNBIND:
1135                 session++;
1136                 opflag = 0;
1137                 break;
1138         default:
1139                 rs->sr_text = "restrict operations internal error";
1140                 rs->sr_err = LDAP_OTHER;
1141                 return rs->sr_err;
1142         }
1143
1144         if ( !starttls ) {
1145                 /* these checks don't apply to StartTLS */
1146
1147                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1148                 if( op->o_transport_ssf < ssf->sss_transport ) {
1149                         rs->sr_text = op->o_transport_ssf
1150                                 ? "stronger transport confidentiality required"
1151                                 : "transport confidentiality required";
1152                         return rs->sr_err;
1153                 }
1154
1155                 if( op->o_tls_ssf < ssf->sss_tls ) {
1156                         rs->sr_text = op->o_tls_ssf
1157                                 ? "stronger TLS confidentiality required"
1158                                 : "TLS confidentiality required";
1159                         return rs->sr_err;
1160                 }
1161
1162
1163                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1164                         /* simple bind specific check */
1165                         if( op->o_ssf < ssf->sss_simple_bind ) {
1166                                 rs->sr_text = op->o_ssf
1167                                         ? "stronger confidentiality required"
1168                                         : "confidentiality required";
1169                                 return rs->sr_err;
1170                         }
1171                 }
1172
1173                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1174                         /* these checks don't apply to SASL bind */
1175
1176                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1177                                 rs->sr_text = op->o_sasl_ssf
1178                                         ? "stronger SASL confidentiality required"
1179                                         : "SASL confidentiality required";
1180                                 return rs->sr_err;
1181                         }
1182
1183                         if( op->o_ssf < ssf->sss_ssf ) {
1184                                 rs->sr_text = op->o_ssf
1185                                         ? "stronger confidentiality required"
1186                                         : "confidentiality required";
1187                                 return rs->sr_err;
1188                         }
1189                 }
1190
1191                 if( updateop ) {
1192                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1193                                 rs->sr_text = op->o_transport_ssf
1194                                         ? "stronger transport confidentiality required for update"
1195                                         : "transport confidentiality required for update";
1196                                 return rs->sr_err;
1197                         }
1198
1199                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1200                                 rs->sr_text = op->o_tls_ssf
1201                                         ? "stronger TLS confidentiality required for update"
1202                                         : "TLS confidentiality required for update";
1203                                 return rs->sr_err;
1204                         }
1205
1206                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1207                                 rs->sr_text = op->o_sasl_ssf
1208                                         ? "stronger SASL confidentiality required for update"
1209                                         : "SASL confidentiality required for update";
1210                                 return rs->sr_err;
1211                         }
1212
1213                         if( op->o_ssf < ssf->sss_update_ssf ) {
1214                                 rs->sr_text = op->o_ssf
1215                                         ? "stronger confidentiality required for update"
1216                                         : "confidentiality required for update";
1217                                 return rs->sr_err;
1218                         }
1219
1220                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1221                                 BER_BVISEMPTY( &op->o_ndn ) )
1222                         {
1223                                 rs->sr_text = "modifications require authentication";
1224                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1225                                 return rs->sr_err;
1226                         }
1227
1228 #ifdef SLAP_X_LISTENER_MOD
1229                         if ( op->o_conn->c_listener &&
1230                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1231                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1232                         {
1233                                 /* no "w" mode means readonly */
1234                                 rs->sr_text = "modifications not allowed on this listener";
1235                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1236                                 return rs->sr_err;
1237                         }
1238 #endif /* SLAP_X_LISTENER_MOD */
1239                 }
1240         }
1241
1242         if ( !session ) {
1243                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1244
1245                 if( requires & SLAP_REQUIRE_STRONG ) {
1246                         /* should check mechanism */
1247                         if( ( op->o_transport_ssf < ssf->sss_transport
1248                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1249                                 || BER_BVISEMPTY( &op->o_dn ) )
1250                         {
1251                                 rs->sr_text = "strong(er) authentication required";
1252                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1253                                 return rs->sr_err;
1254                         }
1255                 }
1256
1257                 if( requires & SLAP_REQUIRE_SASL ) {
1258                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1259                                 rs->sr_text = "SASL authentication required";
1260                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1261                                 return rs->sr_err;
1262                         }
1263                 }
1264
1265                 if( requires & SLAP_REQUIRE_AUTHC ) {
1266                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1267                                 rs->sr_text = "authentication required";
1268                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1269                                 return rs->sr_err;
1270                         }
1271                 }
1272
1273                 if( requires & SLAP_REQUIRE_BIND ) {
1274                         int version;
1275                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1276                         version = op->o_conn->c_protocol;
1277                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1278
1279                         if( !version ) {
1280                                 /* no bind has occurred */
1281                                 rs->sr_text = "BIND required";
1282                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1283                                 return rs->sr_err;
1284                         }
1285                 }
1286
1287                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1288                         if( op->o_protocol < LDAP_VERSION3 ) {
1289                                 /* no bind has occurred */
1290                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1291                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1292                                 return rs->sr_err;
1293                         }
1294                 }
1295
1296 #ifdef SLAP_X_LISTENER_MOD
1297                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1298                         if ( op->o_conn->c_listener &&
1299                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1300                 {
1301                                 /* no "x" mode means bind required */
1302                                 rs->sr_text = "bind required on this listener";
1303                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1304                                 return rs->sr_err;
1305                         }
1306                 }
1307
1308                 if ( !starttls && !updateop ) {
1309                         if ( op->o_conn->c_listener &&
1310                                 !( op->o_conn->c_listener->sl_perms &
1311                                         ( !BER_BVISEMPTY( &op->o_dn )
1312                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1313                         {
1314                                 /* no "r" mode means no read */
1315                                 rs->sr_text = "read not allowed on this listener";
1316                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1317                                 return rs->sr_err;
1318                         }
1319                 }
1320 #endif /* SLAP_X_LISTENER_MOD */
1321
1322         }
1323
1324         if( ( restrictops & opflag )
1325                         || ( exopflag && ( restrictops & exopflag ) )
1326                         || (( restrictops & SLAP_RESTRICT_READONLY ) && updateop )) {
1327                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1328                         rs->sr_text = "read operations restricted";
1329                 } else if ( restrictops & exopflag ) {
1330                         rs->sr_text = "extended operation restricted";
1331                 } else {
1332                         rs->sr_text = "operation restricted";
1333                 }
1334                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1335                 return rs->sr_err;
1336         }
1337
1338         rs->sr_err = LDAP_SUCCESS;
1339         return rs->sr_err;
1340 }
1341
1342 int backend_check_referrals( Operation *op, SlapReply *rs )
1343 {
1344         rs->sr_err = LDAP_SUCCESS;
1345
1346         if( op->o_bd->be_chk_referrals ) {
1347                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1348
1349                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1350                         send_ldap_result( op, rs );
1351                 }
1352         }
1353
1354         return rs->sr_err;
1355 }
1356
1357 int
1358 be_entry_get_rw(
1359         Operation *op,
1360         struct berval *ndn,
1361         ObjectClass *oc,
1362         AttributeDescription *at,
1363         int rw,
1364         Entry **e )
1365 {
1366         *e = NULL;
1367
1368         if ( op->o_bd == NULL ) {
1369                 return LDAP_NO_SUCH_OBJECT;
1370         }
1371
1372         if ( op->o_bd->be_fetch ) {
1373                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1374         }
1375
1376         return LDAP_UNWILLING_TO_PERFORM;
1377 }
1378
1379 int
1380 fe_acl_group(
1381         Operation *op,
1382         Entry   *target,
1383         struct berval *gr_ndn,
1384         struct berval *op_ndn,
1385         ObjectClass *group_oc,
1386         AttributeDescription *group_at )
1387 {
1388         Entry *e;
1389         void *o_priv = op->o_private, *e_priv = NULL;
1390         Attribute *a;
1391         int rc;
1392         GroupAssertion *g;
1393         Backend *be = op->o_bd;
1394         OpExtra         *oex;
1395
1396         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1397                 if ( oex->oe_key == (void *)backend_group )
1398                         break;
1399         }
1400
1401         if ( oex && ((OpExtraDB *)oex)->oe_db )
1402                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1403
1404         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1405                 op->o_bd = select_backend( gr_ndn, 0 );
1406
1407         for ( g = op->o_groups; g; g = g->ga_next ) {
1408                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1409                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1410                 {
1411                         continue;
1412                 }
1413                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1414                         break;
1415                 }
1416         }
1417
1418         if ( g ) {
1419                 rc = g->ga_res;
1420                 goto done;
1421         }
1422
1423         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1424                 e = target;
1425                 rc = 0;
1426
1427         } else {
1428                 op->o_private = NULL;
1429                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1430                 e_priv = op->o_private;
1431                 op->o_private = o_priv;
1432         }
1433
1434         if ( e ) {
1435                 a = attr_find( e->e_attrs, group_at );
1436                 if ( a ) {
1437                         /* If the attribute is a subtype of labeledURI,
1438                          * treat this as a dynamic group ala groupOfURLs
1439                          */
1440                         if ( is_at_subtype( group_at->ad_type,
1441                                 slap_schema.si_ad_labeledURI->ad_type ) )
1442                         {
1443                                 int i;
1444                                 LDAPURLDesc *ludp;
1445                                 struct berval bv, nbase;
1446                                 Filter *filter;
1447                                 Entry *user = NULL;
1448                                 void *user_priv = NULL;
1449                                 Backend *b2 = op->o_bd;
1450
1451                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1452                                         user = target;
1453                                 }
1454
1455                                 rc = LDAP_COMPARE_FALSE;
1456                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1457                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1458                                                 LDAP_URL_SUCCESS )
1459                                         {
1460                                                 continue;
1461                                         }
1462
1463                                         BER_BVZERO( &nbase );
1464
1465                                         /* host, attrs and extensions parts must be empty */
1466                                         if ( ( ludp->lud_host && *ludp->lud_host )
1467                                                 || ludp->lud_attrs
1468                                                 || ludp->lud_exts )
1469                                         {
1470                                                 goto loopit;
1471                                         }
1472
1473                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1474                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1475                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1476                                         {
1477                                                 goto loopit;
1478                                         }
1479
1480                                         switch ( ludp->lud_scope ) {
1481                                         case LDAP_SCOPE_BASE:
1482                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1483                                                         goto loopit;
1484                                                 }
1485                                                 break;
1486                                         case LDAP_SCOPE_ONELEVEL:
1487                                                 dnParent( op_ndn, &bv );
1488                                                 if ( !dn_match( &nbase, &bv ) ) {
1489                                                         goto loopit;
1490                                                 }
1491                                                 break;
1492                                         case LDAP_SCOPE_SUBTREE:
1493                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1494                                                         goto loopit;
1495                                                 }
1496                                                 break;
1497                                         case LDAP_SCOPE_SUBORDINATE:
1498                                                 if ( dn_match( &nbase, op_ndn ) ||
1499                                                         !dnIsSuffix( op_ndn, &nbase ) )
1500                                                 {
1501                                                         goto loopit;
1502                                                 }
1503                                         }
1504
1505                                         /* NOTE: this could be NULL
1506                                          * if no filter is provided,
1507                                          * or if filter parsing fails.
1508                                          * In the latter case,
1509                                          * we should give up. */
1510                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1511                                                 filter = str2filter_x( op, ludp->lud_filter );
1512                                                 if ( filter == NULL ) {
1513                                                         /* give up... */
1514                                                         rc = LDAP_OTHER;
1515                                                         goto loopit;
1516                                                 }
1517
1518                                                 /* only get user if required
1519                                                  * and not available yet */
1520                                                 if ( user == NULL ) {
1521                                                         int rc2;
1522
1523                                                         op->o_bd = select_backend( op_ndn, 0 );
1524                                                         op->o_private = NULL;
1525                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1526                                                         user_priv = op->o_private;
1527                                                         op->o_private = o_priv;
1528                                                         if ( rc2 != 0 ) {
1529                                                                 /* give up... */
1530                                                                 rc = LDAP_OTHER;
1531                                                                 goto loopit;
1532                                                         }
1533                                                 }
1534
1535                                                 if ( test_filter( NULL, user, filter ) ==
1536                                                         LDAP_COMPARE_TRUE )
1537                                                 {
1538                                                         rc = 0;
1539                                                 }
1540                                                 filter_free_x( op, filter, 1 );
1541                                         }
1542 loopit:
1543                                         ldap_free_urldesc( ludp );
1544                                         if ( !BER_BVISNULL( &nbase ) ) {
1545                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1546                                         }
1547                                         if ( rc != LDAP_COMPARE_FALSE ) {
1548                                                 break;
1549                                         }
1550                                 }
1551
1552                                 if ( user != NULL && user != target ) {
1553                                         op->o_private = user_priv;
1554                                         be_entry_release_r( op, user );
1555                                         op->o_private = o_priv;
1556                                 }
1557                                 op->o_bd = b2;
1558
1559                         } else {
1560                                 rc = attr_valfind( a,
1561                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1562                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1563                                         op_ndn, NULL, op->o_tmpmemctx );
1564                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1565                                         rc = LDAP_COMPARE_FALSE;
1566                                 }
1567                         }
1568
1569                 } else {
1570                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1571                 }
1572
1573                 if ( e != target ) {
1574                         op->o_private = e_priv;
1575                         be_entry_release_r( op, e );
1576                         op->o_private = o_priv;
1577                 }
1578
1579         } else {
1580                 rc = LDAP_NO_SUCH_OBJECT;
1581         }
1582
1583         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1584                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1585                         op->o_tmpmemctx );
1586                 g->ga_be = op->o_bd;
1587                 g->ga_oc = group_oc;
1588                 g->ga_at = group_at;
1589                 g->ga_res = rc;
1590                 g->ga_len = gr_ndn->bv_len;
1591                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1592                 g->ga_next = op->o_groups;
1593                 op->o_groups = g;
1594         }
1595
1596 done:
1597         op->o_bd = be;
1598         return rc;
1599 }
1600
1601 int
1602 backend_group(
1603         Operation *op,
1604         Entry   *target,
1605         struct berval *gr_ndn,
1606         struct berval *op_ndn,
1607         ObjectClass *group_oc,
1608         AttributeDescription *group_at )
1609 {
1610         int                     rc;
1611         BackendDB *be_orig;
1612         OpExtraDB       oex;
1613
1614         if ( op->o_abandon ) {
1615                 return SLAPD_ABANDON;
1616         }
1617
1618         oex.oe_db = op->o_bd;
1619         oex.oe.oe_key = (void *)backend_group;
1620         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1621
1622         be_orig = op->o_bd;
1623         op->o_bd = frontendDB;
1624         rc = frontendDB->be_group( op, target, gr_ndn,
1625                 op_ndn, group_oc, group_at );
1626         op->o_bd = be_orig;
1627         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1628
1629         return rc;
1630 }
1631
1632 int
1633 fe_acl_attribute(
1634         Operation *op,
1635         Entry   *target,
1636         struct berval   *edn,
1637         AttributeDescription *entry_at,
1638         BerVarray *vals,
1639         slap_access_t access )
1640 {
1641         Entry                   *e = NULL;
1642         void                    *o_priv = op->o_private, *e_priv = NULL;
1643         Attribute               *a = NULL;
1644         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1645         AccessControlState      acl_state = ACL_STATE_INIT;
1646         Backend                 *be = op->o_bd;
1647         OpExtra         *oex;
1648
1649         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1650                 if ( oex->oe_key == (void *)backend_attribute )
1651                         break;
1652         }
1653
1654         if ( oex && ((OpExtraDB *)oex)->oe_db )
1655                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1656
1657         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1658                 op->o_bd = select_backend( edn, 0 );
1659
1660         if ( target && dn_match( &target->e_nname, edn ) ) {
1661                 e = target;
1662
1663         } else {
1664                 op->o_private = NULL;
1665                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1666                 e_priv = op->o_private;
1667                 op->o_private = o_priv;
1668         }
1669
1670         if ( e ) {
1671                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1672                         assert( vals == NULL );
1673
1674                         rc = LDAP_SUCCESS;
1675                         if ( op->o_conn && access > ACL_NONE &&
1676                                 access_allowed( op, e, entry_at, NULL,
1677                                                 access, &acl_state ) == 0 )
1678                         {
1679                                 rc = LDAP_INSUFFICIENT_ACCESS;
1680                         }
1681                         goto freeit;
1682                 }
1683
1684                 a = attr_find( e->e_attrs, entry_at );
1685                 if ( a == NULL ) {
1686                         SlapReply       rs = { REP_SEARCH };
1687                         AttributeName   anlist[ 2 ];
1688
1689                         anlist[ 0 ].an_name = entry_at->ad_cname;
1690                         anlist[ 0 ].an_desc = entry_at;
1691                         BER_BVZERO( &anlist[ 1 ].an_name );
1692                         rs.sr_attrs = anlist;
1693
1694                         /* NOTE: backend_operational() is also called
1695                          * when returning results, so it's supposed
1696                          * to do no harm to entries */
1697                         rs.sr_entry = e;
1698                         rc = backend_operational( op, &rs );
1699
1700                         if ( rc == LDAP_SUCCESS ) {
1701                                 if ( rs.sr_operational_attrs ) {
1702                                         freeattr = 1;
1703                                         a = rs.sr_operational_attrs;
1704
1705                                 } else {
1706                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1707                                 }
1708                         }
1709                 }
1710
1711                 if ( a ) {
1712                         BerVarray v;
1713
1714                         if ( op->o_conn && access > ACL_NONE &&
1715                                 access_allowed( op, e, entry_at, NULL,
1716                                                 access, &acl_state ) == 0 )
1717                         {
1718                                 rc = LDAP_INSUFFICIENT_ACCESS;
1719                                 goto freeit;
1720                         }
1721
1722                         i = a->a_numvals;
1723                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1724                                 op->o_tmpmemctx );
1725                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1726                         {
1727                                 if ( op->o_conn && access > ACL_NONE &&
1728                                         access_allowed( op, e, entry_at,
1729                                                         &a->a_nvals[i],
1730                                                         access,
1731                                                         &acl_state ) == 0 )
1732                                 {
1733                                         continue;
1734                                 }
1735                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1736                                                 op->o_tmpmemctx );
1737                                 if ( !BER_BVISNULL( &v[j] ) ) {
1738                                         j++;
1739                                 }
1740                         }
1741                         if ( j == 0 ) {
1742                                 op->o_tmpfree( v, op->o_tmpmemctx );
1743                                 *vals = NULL;
1744                                 rc = LDAP_INSUFFICIENT_ACCESS;
1745
1746                         } else {
1747                                 BER_BVZERO( &v[j] );
1748                                 *vals = v;
1749                                 rc = LDAP_SUCCESS;
1750                         }
1751                 }
1752 freeit:         if ( e != target ) {
1753                         op->o_private = e_priv;
1754                         be_entry_release_r( op, e );
1755                         op->o_private = o_priv;
1756                 }
1757                 if ( freeattr ) {
1758                         attr_free( a );
1759                 }
1760         }
1761
1762         op->o_bd = be;
1763         return rc;
1764 }
1765
1766 int
1767 backend_attribute(
1768         Operation *op,
1769         Entry   *target,
1770         struct berval   *edn,
1771         AttributeDescription *entry_at,
1772         BerVarray *vals,
1773         slap_access_t access )
1774 {
1775         int                     rc;
1776         BackendDB *be_orig;
1777         OpExtraDB       oex;
1778
1779         oex.oe_db = op->o_bd;
1780         oex.oe.oe_key = (void *)backend_attribute;
1781         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1782
1783         be_orig = op->o_bd;
1784         op->o_bd = frontendDB;
1785         rc = frontendDB->be_attribute( op, target, edn,
1786                 entry_at, vals, access );
1787         op->o_bd = be_orig;
1788         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1789
1790         return rc;
1791 }
1792
1793 int
1794 backend_access(
1795         Operation               *op,
1796         Entry                   *target,
1797         struct berval           *edn,
1798         AttributeDescription    *entry_at,
1799         struct berval           *nval,
1800         slap_access_t           access,
1801         slap_mask_t             *mask )
1802 {
1803         Entry           *e = NULL;
1804         void            *o_priv, *e_priv = NULL;
1805         int             rc = LDAP_INSUFFICIENT_ACCESS;
1806         Backend         *be;
1807
1808         /* pedantic */
1809         assert( op != NULL );
1810         assert( op->o_conn != NULL );
1811         assert( edn != NULL );
1812         assert( access > ACL_NONE );
1813
1814         be = op->o_bd;
1815         o_priv = op->o_private;
1816
1817         if ( !op->o_bd ) {
1818                 op->o_bd = select_backend( edn, 0 );
1819         }
1820
1821         if ( target && dn_match( &target->e_nname, edn ) ) {
1822                 e = target;
1823
1824         } else {
1825                 op->o_private = NULL;
1826                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1827                 e_priv = op->o_private;
1828                 op->o_private = o_priv;
1829         }
1830
1831         if ( e ) {
1832                 Attribute       *a = NULL;
1833                 int             freeattr = 0;
1834
1835                 if ( entry_at == NULL ) {
1836                         entry_at = slap_schema.si_ad_entry;
1837                 }
1838
1839                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1840                 {
1841                         if ( access_allowed_mask( op, e, entry_at,
1842                                         NULL, access, NULL, mask ) == 0 )
1843                         {
1844                                 rc = LDAP_INSUFFICIENT_ACCESS;
1845
1846                         } else {
1847                                 rc = LDAP_SUCCESS;
1848                         }
1849
1850                 } else {
1851                         a = attr_find( e->e_attrs, entry_at );
1852                         if ( a == NULL ) {
1853                                 SlapReply       rs = { REP_SEARCH };
1854                                 AttributeName   anlist[ 2 ];
1855
1856                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1857                                 anlist[ 0 ].an_desc = entry_at;
1858                                 BER_BVZERO( &anlist[ 1 ].an_name );
1859                                 rs.sr_attrs = anlist;
1860
1861                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1862
1863                                 /* NOTE: backend_operational() is also called
1864                                  * when returning results, so it's supposed
1865                                  * to do no harm to entries */
1866                                 rs.sr_entry = e;
1867                                 rc = backend_operational( op, &rs );
1868
1869                                 if ( rc == LDAP_SUCCESS ) {
1870                                         if ( rs.sr_operational_attrs ) {
1871                                                 freeattr = 1;
1872                                                 a = rs.sr_operational_attrs;
1873
1874                                         } else {
1875                                                 rc = LDAP_NO_SUCH_OBJECT;
1876                                         }
1877                                 }
1878                         }
1879
1880                         if ( a ) {
1881                                 if ( access_allowed_mask( op, e, entry_at,
1882                                                 nval, access, NULL, mask ) == 0 )
1883                                 {
1884                                         rc = LDAP_INSUFFICIENT_ACCESS;
1885                                         goto freeit;
1886                                 }
1887                                 rc = LDAP_SUCCESS;
1888                         }
1889                 }
1890 freeit:         if ( e != target ) {
1891                         op->o_private = e_priv;
1892                         be_entry_release_r( op, e );
1893                         op->o_private = o_priv;
1894                 }
1895                 if ( freeattr ) {
1896                         attr_free( a );
1897                 }
1898         }
1899
1900         op->o_bd = be;
1901         return rc;
1902 }
1903
1904 int
1905 fe_aux_operational(
1906         Operation *op,
1907         SlapReply *rs )
1908 {
1909         Attribute               **ap;
1910         int                     rc = LDAP_SUCCESS;
1911         BackendDB               *be_orig = op->o_bd;
1912         OpExtra         *oex;
1913
1914         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1915                 if ( oex->oe_key == (void *)backend_operational )
1916                         break;
1917         }
1918
1919         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1920                 /* just count them */ ;
1921
1922         /*
1923          * If operational attributes (allegedly) are required,
1924          * and the backend supports specific operational attributes,
1925          * add them to the attribute list
1926          */
1927         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1928                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1929                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1930         {
1931                 *ap = slap_operational_entryDN( rs->sr_entry );
1932                 ap = &(*ap)->a_next;
1933         }
1934
1935         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1936                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1937                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1938         {
1939                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1940                 ap = &(*ap)->a_next;
1941         }
1942
1943         /* Let the overlays have a chance at this */
1944         if ( oex && ((OpExtraDB *)oex)->oe_db )
1945                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1946
1947         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1948                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1949
1950         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1951                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1952                 op->o_bd->be_operational != NULL )
1953         {
1954                 rc = op->o_bd->be_operational( op, rs );
1955         }
1956         op->o_bd = be_orig;
1957
1958         return rc;
1959 }
1960
1961 int backend_operational( Operation *op, SlapReply *rs )
1962 {
1963         int rc;
1964         BackendDB *be_orig;
1965         OpExtraDB       oex;
1966
1967         oex.oe_db = op->o_bd;
1968         oex.oe.oe_key = (void *)backend_operational;
1969         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1970
1971         /* Moved this into the frontend so global overlays are called */
1972
1973         be_orig = op->o_bd;
1974         op->o_bd = frontendDB;
1975         rc = frontendDB->be_operational( op, rs );
1976         op->o_bd = be_orig;
1977         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1978
1979         return rc;
1980 }
1981
1982 /* helper that calls the bi_tool_entry_first_x() variant with default args;
1983  * use to initialize a backend's bi_tool_entry_first() when appropriate
1984  */
1985 ID
1986 backend_tool_entry_first( BackendDB *be )
1987 {
1988         return be->bd_info->bi_tool_entry_first_x( be,
1989                 NULL, LDAP_SCOPE_DEFAULT, NULL );
1990 }