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 1998-2007 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 "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 /*
  41  * If a module is configured as dynamic, its header should not
  42  * get included into slapd. While this is a general rule and does
  43  * not have much of an effect in UNIX, this rule should be adhered
  44  * to for Windows, where dynamic object code should not be implicitly
  45  * imported into slapd without appropriate __declspec(dllimport) directives.
  46  */
  47
  48 int                     nBackendInfo = 0;
  49 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  50
  51 int                     nBackendDB = 0;
  52 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  53
  54 static int
  55 backend_init_controls( BackendInfo *bi )
  56 {
  57         if ( bi->bi_controls ) {
  58                 int     i;
  59
  60                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  61                         int     cid;
  62
  63                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  64                                         == LDAP_CONTROL_NOT_FOUND )
  65                         {
  66                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  67                                         assert( 0 );
  68                                 }
  69
  70                                 return -1;
  71                         }
  72
  73                         bi->bi_ctrls[ cid ] = 1;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 int backend_init(void)
  81 {
  82         int rc = -1;
  83         BackendInfo *bi;
  84
  85         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  86                 /* already initialized */
  87                 Debug( LDAP_DEBUG_ANY,
  88                         "backend_init: already initialized\n", 0, 0, 0 );
  89                 return -1;
  90         }
  91
  92         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  93                 assert( bi->bi_init != 0 );
  94
  95                 rc = bi->bi_init( bi );
  96
  97                 if(rc != 0) {
  98                         Debug( LDAP_DEBUG_ANY,
  99                                 "backend_init: initialized for type \"%s\"\n",
 100                                 bi->bi_type, 0, 0 );
 101                         /* destroy those we've already inited */
 102                         for( nBackendInfo--;
 103                                 nBackendInfo >= 0 ;
 104                                 nBackendInfo-- )
 105                         {
 106                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 107                                         slap_binfo[nBackendInfo].bi_destroy(
 108                                                 &slap_binfo[nBackendInfo] );
 109                                 }
 110                         }
 111                         return rc;
 112                 }
 113
 114                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 115         }
 116
 117         if ( nBackendInfo > 0) {
 118                 return 0;
 119         }
 120
 121 #ifdef SLAPD_MODULES
 122         return 0;
 123 #else
 124
 125         Debug( LDAP_DEBUG_ANY,
 126                 "backend_init: failed\n",
 127                 0, 0, 0 );
 128
 129         return rc;
 130 #endif /* SLAPD_MODULES */
 131 }
 132
 133 int backend_add(BackendInfo *aBackendInfo)
 134 {
 135         int rc = 0;
 136
 137         if ( aBackendInfo->bi_init == NULL ) {
 138                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 139                         "backend type \"%s\" does not have the (mandatory)init function\n",
 140                         aBackendInfo->bi_type, 0, 0 );
 141                 return -1;
 142         }
 143
 144         rc = aBackendInfo->bi_init(aBackendInfo);
 145         if ( rc != 0) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_add:  initialization for type \"%s\" failed\n",
 148                         aBackendInfo->bi_type, 0, 0 );
 149                 return rc;
 150         }
 151
 152         (void)backend_init_controls( aBackendInfo );
 153
 154         /* now add the backend type to the Backend Info List */
 155         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 156         nBackendInfo++;
 157         return 0;
 158 }
 159
 160 static int
 161 backend_set_controls( BackendDB *be )
 162 {
 163         BackendInfo     *bi = be->bd_info;
 164
 165         /* back-relay takes care of itself; so may do other */
 166         if ( overlay_is_over( be ) ) {
 167                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 168         }
 169
 170         if ( bi->bi_controls ) {
 171                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 172                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 173                                         sizeof( be->be_ctrls ) );
 174                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 175
 176                 } else {
 177                         int     i;
 178
 179                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 180                                 if ( bi->bi_ctrls[ i ] ) {
 181                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 182                                 }
 183                         }
 184                 }
 185
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* startup a specific backend database */
 192 int backend_startup_one(Backend *be)
 193 {
 194         int             rc = 0;
 195
 196         assert( be != NULL );
 197
 198         be->be_pending_csn_list = (struct be_pcl *)
 199                 ch_calloc( 1, sizeof( struct be_pcl ) );
 200
 201         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 202
 203         Debug( LDAP_DEBUG_TRACE,
 204                 "backend_startup_one: starting \"%s\"\n",
 205                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 206                 0, 0 );
 207
 208         /* set database controls */
 209         (void)backend_set_controls( be );
 210
 211         if ( be->bd_info->bi_db_open ) {
 212                 rc = be->bd_info->bi_db_open( be );
 213                 if ( rc == 0 ) {
 214                         (void)backend_set_controls( be );
 215
 216                 } else {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 219                                 rc, 0, 0 );
 220                 }
 221         }
 222
 223         return rc;
 224 }
 225
 226 int backend_startup(Backend *be)
 227 {
 228         int i;
 229         int rc = 0;
 230         BackendInfo *bi;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "backend_startup: %d databases to startup.\n",
 236                         nBackendDB, 0, 0 );
 237                 return 1;
 238         }
 239
 240         if(be != NULL) {
 241                 if ( be->bd_info->bi_open ) {
 242                         rc = be->bd_info->bi_open( be->bd_info );
 243                         if ( rc != 0 ) {
 244                                 Debug( LDAP_DEBUG_ANY,
 245                                         "backend_startup: bi_open failed!\n",
 246                                         0, 0, 0 );
 247
 248                                 return rc;
 249                         }
 250                 }
 251                 /* append global access controls */
 252                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 253
 254                 return backend_startup_one( be );
 255         }
 256
 257         /* open frontend, if required */
 258         if ( frontendDB->bd_info->bi_db_open ) {
 259                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 260                 if ( rc != 0 ) {
 261                         Debug( LDAP_DEBUG_ANY,
 262                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 263                                 rc, 0, 0 );
 264                         return rc;
 265                 }
 266         }
 267
 268         /* open each backend type */
 269         i = -1;
 270         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 271                 i++;
 272                 if( bi->bi_nDB == 0) {
 273                         /* no database of this type, don't open */
 274                         continue;
 275                 }
 276
 277                 if( bi->bi_open ) {
 278                         rc = bi->bi_open( bi );
 279                         if ( rc != 0 ) {
 280                                 Debug( LDAP_DEBUG_ANY,
 281                                         "backend_startup: bi_open %d (%s) failed!\n",
 282                                         i, bi->bi_type, 0 );
 283                                 return rc;
 284                         }
 285                 }
 286
 287                 (void)backend_init_controls( bi );
 288         }
 289
 290         /* open each backend database */
 291         i = -1;
 292         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 293                 i++;
 294                 if ( be->be_suffix == NULL ) {
 295                         Debug( LDAP_DEBUG_ANY,
 296                                 "backend_startup: warning, database %d (%s) "
 297                                 "has no suffix\n",
 298                                 i, be->bd_info->bi_type, 0 );
 299                 }
 300                 /* append global access controls */
 301                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 302
 303                 rc = backend_startup_one( be );
 304
 305                 if ( rc ) return rc;
 306         }
 307
 308         return rc;
 309 }
 310
 311 int backend_num( Backend *be )
 312 {
 313         int i = 0;
 314         BackendDB *b2;
 315
 316         if( be == NULL ) return -1;
 317
 318         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 319                 if( be == b2 ) return i;
 320                 i++;
 321         }
 322         return -1;
 323 }
 324
 325 int backend_shutdown( Backend *be )
 326 {
 327         int rc = 0;
 328         BackendInfo *bi;
 329
 330         if( be != NULL ) {
 331                 /* shutdown a specific backend database */
 332
 333                 if ( be->bd_info->bi_nDB == 0 ) {
 334                         /* no database of this type, we never opened it */
 335                         return 0;
 336                 }
 337
 338                 if ( be->bd_info->bi_db_close ) {
 339                         be->bd_info->bi_db_close( be );
 340                 }
 341
 342                 if( be->bd_info->bi_close ) {
 343                         be->bd_info->bi_close( be->bd_info );
 344                 }
 345
 346                 return 0;
 347         }
 348
 349         /* close each backend database */
 350         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 351                 if ( be->bd_info->bi_db_close ) {
 352                         be->bd_info->bi_db_close( be );
 353                 }
 354
 355                 if(rc != 0) {
 356                         Debug( LDAP_DEBUG_ANY,
 357                                 "backend_close: bi_db_close %s failed!\n",
 358                                 be->be_type, 0, 0 );
 359                 }
 360         }
 361
 362         /* close each backend type */
 363         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 364                 if( bi->bi_nDB == 0 ) {
 365                         /* no database of this type */
 366                         continue;
 367                 }
 368
 369                 if( bi->bi_close ) {
 370                         bi->bi_close( bi );
 371                 }
 372         }
 373
 374         /* close frontend, if required */
 375         if ( frontendDB->bd_info->bi_db_close ) {
 376                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 377                 if ( rc != 0 ) {
 378                         Debug( LDAP_DEBUG_ANY,
 379                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 380                                 rc, 0, 0 );
 381                 }
 382         }
 383
 384         return 0;
 385 }
 386
 387 /*
 388  * This function is supposed to be the exact counterpart
 389  * of backend_startup_one(), although this one calls bi_db_destroy()
 390  * while backend_startup_one() calls bi_db_open().
 391  *
 392  * Make sure backend_stopdown_one() destroys resources allocated
 393  * by backend_startup_one(); only call backend_destroy_one() when
 394  * all stuff in a BackendDB needs to be destroyed
 395  */
 396 void
 397 backend_stopdown_one( BackendDB *bd )
 398 {
 399         if ( bd->be_pending_csn_list ) {
 400                 struct slap_csn_entry *csne;
 401                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 402                 while ( csne ) {
 403                         struct slap_csn_entry *tmp_csne = csne;
 404
 405                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 406                         ch_free( csne->ce_csn.bv_val );
 407                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 408                         ch_free( tmp_csne );
 409                 }
 410                 ch_free( bd->be_pending_csn_list );
 411         }
 412
 413         if ( bd->bd_info->bi_db_destroy ) {
 414                 bd->bd_info->bi_db_destroy( bd );
 415         }
 416 }
 417
 418 void backend_destroy_one( BackendDB *bd, int dynamic )
 419 {
 420         if ( dynamic ) {
 421                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 422         }
 423
 424         if ( bd->be_syncinfo ) {
 425                 syncinfo_free( bd->be_syncinfo, 1 );
 426         }
 427
 428         backend_stopdown_one( bd );
 429
 430         ber_bvarray_free( bd->be_suffix );
 431         ber_bvarray_free( bd->be_nsuffix );
 432         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 433                 free( bd->be_rootdn.bv_val );
 434         }
 435         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 436                 free( bd->be_rootndn.bv_val );
 437         }
 438         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 439                 free( bd->be_rootpw.bv_val );
 440         }
 441         acl_destroy( bd->be_acl, frontendDB->be_acl );
 442         limits_destroy( bd->be_limits );
 443         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 444                 ch_free( bd->be_update_ndn.bv_val );
 445         }
 446         if ( bd->be_update_refs ) {
 447                 ber_bvarray_free( bd->be_update_refs );
 448         }
 449
 450         if ( dynamic ) {
 451                 free( bd );
 452         }
 453 }
 454
 455 int backend_destroy(void)
 456 {
 457         BackendDB *bd;
 458         BackendInfo *bi;
 459
 460         /* destroy each backend database */
 461         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 462                 backend_destroy_one( bd, 1 );
 463         }
 464
 465         /* destroy each backend type */
 466         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 467                 if( bi->bi_destroy ) {
 468                         bi->bi_destroy( bi );
 469                 }
 470         }
 471
 472         nBackendInfo = 0;
 473         LDAP_STAILQ_INIT(&backendInfo);
 474
 475         /* destroy frontend database */
 476         bd = frontendDB;
 477         if ( bd ) {
 478                 if ( bd->bd_info->bi_db_destroy ) {
 479                         bd->bd_info->bi_db_destroy( bd );
 480                 }
 481                 ber_bvarray_free( bd->be_suffix );
 482                 ber_bvarray_free( bd->be_nsuffix );
 483                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 484                         free( bd->be_rootdn.bv_val );
 485                 }
 486                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 487                         free( bd->be_rootndn.bv_val );
 488                 }
 489                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 490                         free( bd->be_rootpw.bv_val );
 491                 }
 492                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 493         }
 494
 495         return 0;
 496 }
 497
 498 BackendInfo* backend_info(const char *type)
 499 {
 500         BackendInfo *bi;
 501
 502         /* search for the backend type */
 503         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 504                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 505                         return bi;
 506                 }
 507         }
 508
 509         return NULL;
 510 }
 511
 512 void
 513 backend_db_insert(
 514         BackendDB *be,
 515         int idx
 516 )
 517 {
 518         /* If idx < 0, just add to end of list */
 519         if ( idx < 0 ) {
 520                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 521         } else if ( idx == 0 ) {
 522                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 523         } else {
 524                 int i;
 525                 BackendDB *b2;
 526
 527                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 528                 idx--;
 529                 for (i=0; i<idx; i++) {
 530                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 531                 }
 532                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 533         }
 534 }
 535
 536 void
 537 backend_db_move(
 538         BackendDB *be,
 539         int idx
 540 )
 541 {
 542         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 543         backend_db_insert(be, idx);
 544 }
 545
 546 BackendDB *
 547 backend_db_init(
 548     const char  *type,
 549         BackendDB *b0,
 550         int idx )
 551 {
 552         BackendInfo *bi = backend_info(type);
 553         BackendDB *be = b0;
 554         int     rc = 0;
 555
 556         if( bi == NULL ) {
 557                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 558                 return NULL;
 559         }
 560
 561         /* If be is provided, treat it as private. Otherwise allocate
 562          * one and add it to the global list.
 563          */
 564         if ( !be ) {
 565                 be = ch_calloc( 1, sizeof(Backend) );
 566                 /* Just append */
 567                 if ( idx >= nbackends )
 568                         idx = -1;
 569                 nbackends++;
 570                 backend_db_insert( be, idx );
 571         }
 572
 573         be->bd_info = bi;
 574
 575         be->be_def_limit = frontendDB->be_def_limit;
 576         be->be_dfltaccess = frontendDB->be_dfltaccess;
 577
 578         be->be_restrictops = frontendDB->be_restrictops;
 579         be->be_requires = frontendDB->be_requires;
 580         be->be_ssf_set = frontendDB->be_ssf_set;
 581
 582         be->be_pcl_mutexp = &be->be_pcl_mutex;
 583         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 584
 585         /* assign a default depth limit for alias deref */
 586         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 587
 588         if ( bi->bi_db_init ) {
 589                 rc = bi->bi_db_init( be );
 590         }
 591
 592         if ( rc != 0 ) {
 593                 fprintf( stderr, "database init failed (%s)\n", type );
 594                 /* If we created and linked this be, remove it and free it */
 595                 if ( !b0 ) {
 596                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 597                         ch_free( be );
 598                         be = NULL;
 599                         nbackends--;
 600                 }
 601         } else {
 602                 bi->bi_nDB++;
 603         }
 604         return( be );
 605 }
 606
 607 void
 608 be_db_close( void )
 609 {
 610         BackendDB *be;
 611
 612         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 613                 if ( be->bd_info->bi_db_close ) {
 614                         be->bd_info->bi_db_close( be );
 615                 }
 616         }
 617
 618         if ( frontendDB->bd_info->bi_db_close ) {
 619                 frontendDB->bd_info->bi_db_close( frontendDB );
 620         }
 621
 622 }
 623
 624 Backend *
 625 select_backend(
 626         struct berval * dn,
 627         int noSubs )
 628 {
 629         int             j;
 630         ber_len_t       len, dnlen = dn->bv_len;
 631         Backend         *be;
 632
 633         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 634                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 635                         continue;
 636                 }
 637
 638                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 639                 {
 640                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 641                         {
 642                                 continue;
 643                         }
 644
 645                         len = be->be_nsuffix[j].bv_len;
 646
 647                         if ( len > dnlen ) {
 648                                 /* suffix is longer than DN */
 649                                 continue;
 650                         }
 651
 652                         /*
 653                          * input DN is normalized, so the separator check
 654                          * need not look at escaping
 655                          */
 656                         if ( len && len < dnlen &&
 657                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 658                         {
 659                                 continue;
 660                         }
 661
 662                         if ( strcmp( be->be_nsuffix[j].bv_val,
 663                                 &dn->bv_val[dnlen-len] ) == 0 )
 664                         {
 665                                 return be;
 666                         }
 667                 }
 668         }
 669
 670         return be;
 671 }
 672
 673 int
 674 be_issuffix(
 675     Backend *be,
 676     struct berval *bvsuffix )
 677 {
 678         int     i;
 679
 680         if ( be->be_nsuffix == NULL ) {
 681                 return 0;
 682         }
 683
 684         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 685                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 686                         return 1;
 687                 }
 688         }
 689
 690         return 0;
 691 }
 692
 693 int
 694 be_isroot_dn( Backend *be, struct berval *ndn )
 695 {
 696         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 697                 return 0;
 698         }
 699
 700         return dn_match( &be->be_rootndn, ndn );
 701 }
 702
 703 int
 704 be_slurp_update( Operation *op )
 705 {
 706         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 707                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 708 }
 709
 710 int
 711 be_shadow_update( Operation *op )
 712 {
 713         /* This assumes that all internal ops (connid == -1) on a syncrepl
 714          * database are syncrepl operations.
 715          */
 716         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 717                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 718 }
 719
 720 int
 721 be_isupdate_dn( Backend *be, struct berval *ndn )
 722 {
 723         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 724                 return 0;
 725         }
 726
 727         return dn_match( &be->be_update_ndn, ndn );
 728 }
 729
 730 struct berval *
 731 be_root_dn( Backend *be )
 732 {
 733         return &be->be_rootdn;
 734 }
 735
 736 int
 737 be_isroot( Operation *op )
 738 {
 739         return be_isroot_dn( op->o_bd, &op->o_ndn );
 740 }
 741
 742 int
 743 be_isroot_pw( Operation *op )
 744 {
 745         int result;
 746
 747         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 748                 return 0;
 749         }
 750
 751         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 752                 return 0;
 753         }
 754
 755 #ifdef SLAPD_SPASSWD
 756         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 757                 op->o_conn->c_sasl_authctx, NULL );
 758 #endif
 759
 760         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 761
 762 #ifdef SLAPD_SPASSWD
 763         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 764 #endif
 765
 766         return result == 0;
 767 }
 768
 769 int
 770 be_entry_release_rw(
 771         Operation *op,
 772         Entry *e,
 773         int rw )
 774 {
 775         if ( op->o_bd->be_release ) {
 776                 /* free and release entry from backend */
 777                 return op->o_bd->be_release( op, e, rw );
 778         } else {
 779                 /* free entry */
 780                 entry_free( e );
 781                 return 0;
 782         }
 783 }
 784
 785 int
 786 backend_unbind( Operation *op, SlapReply *rs )
 787 {
 788         BackendDB *be;
 789
 790         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 791                 if ( be->be_unbind ) {
 792                         op->o_bd = be;
 793                         be->be_unbind( op, rs );
 794                 }
 795         }
 796
 797         return 0;
 798 }
 799
 800 int
 801 backend_connection_init(
 802         Connection   *conn )
 803 {
 804         BackendDB *be;
 805
 806         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 807                 if ( be->be_connection_init ) {
 808                         be->be_connection_init( be, conn );
 809                 }
 810         }
 811
 812         return 0;
 813 }
 814
 815 int
 816 backend_connection_destroy(
 817         Connection   *conn )
 818 {
 819         BackendDB *be;
 820
 821         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 822                 if ( be->be_connection_destroy ) {
 823                         be->be_connection_destroy( be, conn);
 824                 }
 825         }
 826
 827         return 0;
 828 }
 829
 830 int
 831 backend_check_controls(
 832         Operation *op,
 833         SlapReply *rs )
 834 {
 835         LDAPControl **ctrls = op->o_ctrls;
 836         rs->sr_err = LDAP_SUCCESS;
 837
 838         if( ctrls ) {
 839                 for( ; *ctrls != NULL ; ctrls++ ) {
 840                         int cid;
 841
 842                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 843                         case LDAP_CONTROL_NOT_FOUND:
 844                                 /* unrecognized control */
 845                                 if ( (*ctrls)->ldctl_iscritical ) {
 846                                         /* should not be reachable */
 847                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 848                                                 "unrecognized critical control: %s\n",
 849                                                 (*ctrls)->ldctl_oid, 0, 0 );
 850                                         assert( 0 );
 851                                 } else {
 852                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 853                                                 "unrecognized non-critical control: %s\n",
 854                                                 (*ctrls)->ldctl_oid, 0, 0 );
 855                                 }
 856                                 break;
 857
 858                         case LDAP_COMPARE_FALSE:
 859                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 860                                         /* RFC 4511 allows unavailableCriticalExtension to be
 861                                          * returned when the server is unwilling to perform
 862                                          * an operation extended by a recognized critical
 863                                          * control.
 864                                          */
 865                                         rs->sr_text = "critical control unavailable in context";
 866                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 867                                         goto done;
 868                                 }
 869                                 break;
 870
 871                         case LDAP_COMPARE_TRUE:
 872                                 break;
 873
 874                         default:
 875                                 /* unreachable */
 876                                 Debug( LDAP_DEBUG_ANY,
 877                                         "backend_check_controls: unable to check control: %s\n",
 878                                         (*ctrls)->ldctl_oid, 0, 0 );
 879                                 assert( 0 );
 880
 881                                 rs->sr_text = "unable to check control";
 882                                 rs->sr_err = LDAP_OTHER;
 883                                 goto done;
 884                         }
 885                 }
 886         }
 887
 888 #if 0 /* temporarily removed */
 889         /* check should be generalized */
 890         if( get_relax(op) && !be_isroot(op)) {
 891                 rs->sr_text = "requires manager authorization";
 892                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 893         }
 894 #endif
 895
 896 done:;
 897         return rs->sr_err;
 898 }
 899
 900 int
 901 backend_check_restrictions(
 902         Operation *op,
 903         SlapReply *rs,
 904         struct berval *opdata )
 905 {
 906         slap_mask_t restrictops;
 907         slap_mask_t requires;
 908         slap_mask_t opflag;
 909         slap_mask_t exopflag = 0;
 910         slap_ssf_set_t *ssf;
 911         int updateop = 0;
 912         int starttls = 0;
 913         int session = 0;
 914
 915         if ( op->o_bd ) {
 916                 int     rc = SLAP_CB_CONTINUE;
 917
 918                 if ( op->o_bd->be_chk_controls ) {
 919                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 920                 }
 921
 922                 if ( rc == SLAP_CB_CONTINUE ) {
 923                         rc = backend_check_controls( op, rs );
 924                 }
 925
 926                 if ( rc != LDAP_SUCCESS ) {
 927                         return rs->sr_err;
 928                 }
 929
 930                 restrictops = op->o_bd->be_restrictops;
 931                 requires = op->o_bd->be_requires;
 932                 ssf = &op->o_bd->be_ssf_set;
 933
 934         } else {
 935                 restrictops = frontendDB->be_restrictops;
 936                 requires = frontendDB->be_requires;
 937                 ssf = &frontendDB->be_ssf_set;
 938         }
 939
 940         switch( op->o_tag ) {
 941         case LDAP_REQ_ADD:
 942                 opflag = SLAP_RESTRICT_OP_ADD;
 943                 updateop++;
 944                 break;
 945         case LDAP_REQ_BIND:
 946                 opflag = SLAP_RESTRICT_OP_BIND;
 947                 session++;
 948                 break;
 949         case LDAP_REQ_COMPARE:
 950                 opflag = SLAP_RESTRICT_OP_COMPARE;
 951                 break;
 952         case LDAP_REQ_DELETE:
 953                 updateop++;
 954                 opflag = SLAP_RESTRICT_OP_DELETE;
 955                 break;
 956         case LDAP_REQ_EXTENDED:
 957                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 958
 959                 if( !opdata ) {
 960                         /* treat unspecified as a modify */
 961                         opflag = SLAP_RESTRICT_OP_MODIFY;
 962                         updateop++;
 963                         break;
 964                 }
 965
 966                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 967                         session++;
 968                         starttls++;
 969                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 970                         break;
 971                 }
 972
 973                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 974                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 975                         break;
 976                 }
 977
 978                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 979                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 980                         break;
 981                 }
 982
 983                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 984                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 985                         updateop++;
 986                         break;
 987                 }
 988
 989                 /* treat everything else as a modify */
 990                 opflag = SLAP_RESTRICT_OP_MODIFY;
 991                 updateop++;
 992                 break;
 993
 994         case LDAP_REQ_MODIFY:
 995                 updateop++;
 996                 opflag = SLAP_RESTRICT_OP_MODIFY;
 997                 break;
 998         case LDAP_REQ_RENAME:
 999                 updateop++;
1000                 opflag = SLAP_RESTRICT_OP_RENAME;
1001                 break;
1002         case LDAP_REQ_SEARCH:
1003                 opflag = SLAP_RESTRICT_OP_SEARCH;
1004                 break;
1005         case LDAP_REQ_UNBIND:
1006                 session++;
1007                 opflag = 0;
1008                 break;
1009         default:
1010                 rs->sr_text = "restrict operations internal error";
1011                 rs->sr_err = LDAP_OTHER;
1012                 return rs->sr_err;
1013         }
1014
1015         if ( !starttls ) {
1016                 /* these checks don't apply to StartTLS */
1017
1018                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1019                 if( op->o_transport_ssf < ssf->sss_transport ) {
1020                         rs->sr_text = op->o_transport_ssf
1021                                 ? "stronger transport confidentiality required"
1022                                 : "transport confidentiality required";
1023                         return rs->sr_err;
1024                 }
1025
1026                 if( op->o_tls_ssf < ssf->sss_tls ) {
1027                         rs->sr_text = op->o_tls_ssf
1028                                 ? "stronger TLS confidentiality required"
1029                                 : "TLS confidentiality required";
1030                         return rs->sr_err;
1031                 }
1032
1033
1034                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1035                         /* simple bind specific check */
1036                         if( op->o_ssf < ssf->sss_simple_bind ) {
1037                                 rs->sr_text = op->o_ssf
1038                                         ? "stronger confidentiality required"
1039                                         : "confidentiality required";
1040                                 return rs->sr_err;
1041                         }
1042                 }
1043
1044                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1045                         /* these checks don't apply to SASL bind */
1046
1047                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1048                                 rs->sr_text = op->o_sasl_ssf
1049                                         ? "stronger SASL confidentiality required"
1050                                         : "SASL confidentiality required";
1051                                 return rs->sr_err;
1052                         }
1053
1054                         if( op->o_ssf < ssf->sss_ssf ) {
1055                                 rs->sr_text = op->o_ssf
1056                                         ? "stronger confidentiality required"
1057                                         : "confidentiality required";
1058                                 return rs->sr_err;
1059                         }
1060                 }
1061
1062                 if( updateop ) {
1063                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1064                                 rs->sr_text = op->o_transport_ssf
1065                                         ? "stronger transport confidentiality required for update"
1066                                         : "transport confidentiality required for update";
1067                                 return rs->sr_err;
1068                         }
1069
1070                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1071                                 rs->sr_text = op->o_tls_ssf
1072                                         ? "stronger TLS confidentiality required for update"
1073                                         : "TLS confidentiality required for update";
1074                                 return rs->sr_err;
1075                         }
1076
1077                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1078                                 rs->sr_text = op->o_sasl_ssf
1079                                         ? "stronger SASL confidentiality required for update"
1080                                         : "SASL confidentiality required for update";
1081                                 return rs->sr_err;
1082                         }
1083
1084                         if( op->o_ssf < ssf->sss_update_ssf ) {
1085                                 rs->sr_text = op->o_ssf
1086                                         ? "stronger confidentiality required for update"
1087                                         : "confidentiality required for update";
1088                                 return rs->sr_err;
1089                         }
1090
1091                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1092                                 BER_BVISEMPTY( &op->o_ndn ) )
1093                         {
1094                                 rs->sr_text = "modifications require authentication";
1095                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1096                                 return rs->sr_err;
1097                         }
1098
1099 #ifdef SLAP_X_LISTENER_MOD
1100                         if ( op->o_conn->c_listener &&
1101                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1102                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1103                         {
1104                                 /* no "w" mode means readonly */
1105                                 rs->sr_text = "modifications not allowed on this listener";
1106                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1107                                 return rs->sr_err;
1108                         }
1109 #endif /* SLAP_X_LISTENER_MOD */
1110                 }
1111         }
1112
1113         if ( !session ) {
1114                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1115
1116                 if( requires & SLAP_REQUIRE_STRONG ) {
1117                         /* should check mechanism */
1118                         if( ( op->o_transport_ssf < ssf->sss_transport
1119                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1120                                 || BER_BVISEMPTY( &op->o_dn ) )
1121                         {
1122                                 rs->sr_text = "strong(er) authentication required";
1123                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1124                                 return rs->sr_err;
1125                         }
1126                 }
1127
1128                 if( requires & SLAP_REQUIRE_SASL ) {
1129                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1130                                 rs->sr_text = "SASL authentication required";
1131                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1132                                 return rs->sr_err;
1133                         }
1134                 }
1135
1136                 if( requires & SLAP_REQUIRE_AUTHC ) {
1137                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1138                                 rs->sr_text = "authentication required";
1139                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1140                                 return rs->sr_err;
1141                         }
1142                 }
1143
1144                 if( requires & SLAP_REQUIRE_BIND ) {
1145                         int version;
1146                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1147                         version = op->o_conn->c_protocol;
1148                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1149
1150                         if( !version ) {
1151                                 /* no bind has occurred */
1152                                 rs->sr_text = "BIND required";
1153                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1154                                 return rs->sr_err;
1155                         }
1156                 }
1157
1158                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1159                         if( op->o_protocol < LDAP_VERSION3 ) {
1160                                 /* no bind has occurred */
1161                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1162                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1163                                 return rs->sr_err;
1164                         }
1165                 }
1166
1167 #ifdef SLAP_X_LISTENER_MOD
1168                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1169                         if ( op->o_conn->c_listener &&
1170                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1171                 {
1172                                 /* no "x" mode means bind required */
1173                                 rs->sr_text = "bind required on this listener";
1174                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1175                                 return rs->sr_err;
1176                         }
1177                 }
1178
1179                 if ( !starttls && !updateop ) {
1180                         if ( op->o_conn->c_listener &&
1181                                 !( op->o_conn->c_listener->sl_perms &
1182                                         ( !BER_BVISEMPTY( &op->o_dn )
1183                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1184                         {
1185                                 /* no "r" mode means no read */
1186                                 rs->sr_text = "read not allowed on this listener";
1187                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1188                                 return rs->sr_err;
1189                         }
1190                 }
1191 #endif /* SLAP_X_LISTENER_MOD */
1192
1193         }
1194
1195         if( ( restrictops & opflag )
1196                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1197                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1198                         rs->sr_text = "read operations restricted";
1199                 } else if ( restrictops & exopflag ) {
1200                         rs->sr_text = "extended operation restricted";
1201                 } else {
1202                         rs->sr_text = "operation restricted";
1203                 }
1204                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1205                 return rs->sr_err;
1206         }
1207
1208         rs->sr_err = LDAP_SUCCESS;
1209         return rs->sr_err;
1210 }
1211
1212 int backend_check_referrals( Operation *op, SlapReply *rs )
1213 {
1214         rs->sr_err = LDAP_SUCCESS;
1215
1216         if( op->o_bd->be_chk_referrals ) {
1217                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1218
1219                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1220                         send_ldap_result( op, rs );
1221                 }
1222         }
1223
1224         return rs->sr_err;
1225 }
1226
1227 int
1228 be_entry_get_rw(
1229         Operation *op,
1230         struct berval *ndn,
1231         ObjectClass *oc,
1232         AttributeDescription *at,
1233         int rw,
1234         Entry **e )
1235 {
1236         *e = NULL;
1237
1238         if ( op->o_bd == NULL ) {
1239                 return LDAP_NO_SUCH_OBJECT;
1240         }
1241
1242         if ( op->o_bd->be_fetch ) {
1243                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1244         }
1245
1246         return LDAP_UNWILLING_TO_PERFORM;
1247 }
1248
1249 int
1250 fe_acl_group(
1251         Operation *op,
1252         Entry   *target,
1253         struct berval *gr_ndn,
1254         struct berval *op_ndn,
1255         ObjectClass *group_oc,
1256         AttributeDescription *group_at )
1257 {
1258         Entry *e;
1259         void *o_priv = op->o_private, *e_priv = NULL;
1260         Attribute *a;
1261         int rc;
1262         GroupAssertion *g;
1263         Backend *be = op->o_bd;
1264
1265         op->o_bd = select_backend( gr_ndn, 0 );
1266
1267         for ( g = op->o_groups; g; g = g->ga_next ) {
1268                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1269                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1270                 {
1271                         continue;
1272                 }
1273                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1274                         break;
1275                 }
1276         }
1277
1278         if ( g ) {
1279                 rc = g->ga_res;
1280                 goto done;
1281         }
1282
1283         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1284                 e = target;
1285                 rc = 0;
1286
1287         } else {
1288                 op->o_private = NULL;
1289                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1290                 e_priv = op->o_private;
1291                 op->o_private = o_priv;
1292         }
1293
1294         if ( e ) {
1295                 a = attr_find( e->e_attrs, group_at );
1296                 if ( a ) {
1297                         /* If the attribute is a subtype of labeledURI,
1298                          * treat this as a dynamic group ala groupOfURLs
1299                          */
1300                         if ( is_at_subtype( group_at->ad_type,
1301                                 slap_schema.si_ad_labeledURI->ad_type ) )
1302                         {
1303                                 int i;
1304                                 LDAPURLDesc *ludp;
1305                                 struct berval bv, nbase;
1306                                 Filter *filter;
1307                                 Entry *user = NULL;
1308                                 void *user_priv = NULL;
1309                                 Backend *b2 = op->o_bd;
1310
1311                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1312                                         user = target;
1313                                 }
1314
1315                                 rc = LDAP_COMPARE_FALSE;
1316                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1317                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1318                                                 LDAP_URL_SUCCESS )
1319                                         {
1320                                                 continue;
1321                                         }
1322
1323                                         BER_BVZERO( &nbase );
1324
1325                                         /* host, attrs and extensions parts must be empty */
1326                                         if ( ( ludp->lud_host && *ludp->lud_host )
1327                                                 || ludp->lud_attrs
1328                                                 || ludp->lud_exts )
1329                                         {
1330                                                 goto loopit;
1331                                         }
1332
1333                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1334                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1335                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1336                                         {
1337                                                 goto loopit;
1338                                         }
1339
1340                                         switch ( ludp->lud_scope ) {
1341                                         case LDAP_SCOPE_BASE:
1342                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1343                                                         goto loopit;
1344                                                 }
1345                                                 break;
1346                                         case LDAP_SCOPE_ONELEVEL:
1347                                                 dnParent( op_ndn, &bv );
1348                                                 if ( !dn_match( &nbase, &bv ) ) {
1349                                                         goto loopit;
1350                                                 }
1351                                                 break;
1352                                         case LDAP_SCOPE_SUBTREE:
1353                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1354                                                         goto loopit;
1355                                                 }
1356                                                 break;
1357                                         case LDAP_SCOPE_SUBORDINATE:
1358                                                 if ( dn_match( &nbase, op_ndn ) ||
1359                                                         !dnIsSuffix( op_ndn, &nbase ) )
1360                                                 {
1361                                                         goto loopit;
1362                                                 }
1363                                         }
1364
1365                                         /* NOTE: this could be NULL
1366                                          * if no filter is provided,
1367                                          * or if filter parsing fails.
1368                                          * In the latter case,
1369                                          * we should give up. */
1370                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1371                                                 filter = str2filter_x( op, ludp->lud_filter );
1372                                                 if ( filter == NULL ) {
1373                                                         /* give up... */
1374                                                         rc = LDAP_OTHER;
1375                                                         goto loopit;
1376                                                 }
1377
1378                                                 /* only get user if required
1379                                                  * and not available yet */
1380                                                 if ( user == NULL ) {
1381                                                         int rc2;
1382
1383                                                         op->o_bd = select_backend( op_ndn, 0 );
1384                                                         op->o_private = NULL;
1385                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1386                                                         user_priv = op->o_private;
1387                                                         op->o_private = o_priv;
1388                                                         if ( rc2 != 0 ) {
1389                                                                 /* give up... */
1390                                                                 rc = LDAP_OTHER;
1391                                                                 goto loopit;
1392                                                         }
1393                                                 }
1394
1395                                                 if ( test_filter( NULL, user, filter ) ==
1396                                                         LDAP_COMPARE_TRUE )
1397                                                 {
1398                                                         rc = 0;
1399                                                 }
1400                                                 filter_free_x( op, filter );
1401                                         }
1402 loopit:
1403                                         ldap_free_urldesc( ludp );
1404                                         if ( !BER_BVISNULL( &nbase ) ) {
1405                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1406                                         }
1407                                         if ( rc != LDAP_COMPARE_FALSE ) {
1408                                                 break;
1409                                         }
1410                                 }
1411
1412                                 if ( user != NULL && user != target ) {
1413                                         op->o_private = user_priv;
1414                                         be_entry_release_r( op, user );
1415                                         op->o_private = o_priv;
1416                                 }
1417                                 op->o_bd = b2;
1418
1419                         } else {
1420                                 rc = value_find_ex( group_at,
1421                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1422                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1423                                         a->a_nvals, op_ndn, op->o_tmpmemctx );
1424                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1425                                         rc = LDAP_COMPARE_FALSE;
1426                                 }
1427                         }
1428
1429                 } else {
1430                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1431                 }
1432
1433                 if ( e != target ) {
1434                         op->o_private = e_priv;
1435                         be_entry_release_r( op, e );
1436                         op->o_private = o_priv;
1437                 }
1438
1439         } else {
1440                 rc = LDAP_NO_SUCH_OBJECT;
1441         }
1442
1443         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1444                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1445                         op->o_tmpmemctx );
1446                 g->ga_be = op->o_bd;
1447                 g->ga_oc = group_oc;
1448                 g->ga_at = group_at;
1449                 g->ga_res = rc;
1450                 g->ga_len = gr_ndn->bv_len;
1451                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1452                 g->ga_next = op->o_groups;
1453                 op->o_groups = g;
1454         }
1455
1456 done:
1457         op->o_bd = be;
1458         return rc;
1459 }
1460
1461 int
1462 backend_group(
1463         Operation *op,
1464         Entry   *target,
1465         struct berval *gr_ndn,
1466         struct berval *op_ndn,
1467         ObjectClass *group_oc,
1468         AttributeDescription *group_at )
1469 {
1470         int                     rc;
1471         BackendDB               *be_orig;
1472
1473         if ( op->o_abandon ) {
1474                 return SLAPD_ABANDON;
1475         }
1476
1477         be_orig = op->o_bd;
1478         op->o_bd = frontendDB;
1479         rc = frontendDB->be_group( op, target, gr_ndn,
1480                 op_ndn, group_oc, group_at );
1481         op->o_bd = be_orig;
1482
1483         return rc;
1484 }
1485
1486 int
1487 fe_acl_attribute(
1488         Operation *op,
1489         Entry   *target,
1490         struct berval   *edn,
1491         AttributeDescription *entry_at,
1492         BerVarray *vals,
1493         slap_access_t access )
1494 {
1495         Entry                   *e = NULL;
1496         void                    *o_priv = op->o_private, *e_priv = NULL;
1497         Attribute               *a = NULL;
1498         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1499         AccessControlState      acl_state = ACL_STATE_INIT;
1500         Backend                 *be = op->o_bd;
1501
1502         op->o_bd = select_backend( edn, 0 );
1503
1504         if ( target && dn_match( &target->e_nname, edn ) ) {
1505                 e = target;
1506
1507         } else {
1508                 op->o_private = NULL;
1509                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1510                 e_priv = op->o_private;
1511                 op->o_private = o_priv;
1512         }
1513
1514         if ( e ) {
1515                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1516                         assert( vals == NULL );
1517
1518                         rc = LDAP_SUCCESS;
1519                         if ( op->o_conn && access > ACL_NONE &&
1520                                 access_allowed( op, e, entry_at, NULL,
1521                                                 access, &acl_state ) == 0 )
1522                         {
1523                                 rc = LDAP_INSUFFICIENT_ACCESS;
1524                         }
1525                         goto freeit;
1526                 }
1527
1528                 a = attr_find( e->e_attrs, entry_at );
1529                 if ( a == NULL ) {
1530                         SlapReply       rs = { 0 };
1531                         AttributeName   anlist[ 2 ];
1532
1533                         anlist[ 0 ].an_name = entry_at->ad_cname;
1534                         anlist[ 0 ].an_desc = entry_at;
1535                         BER_BVZERO( &anlist[ 1 ].an_name );
1536                         rs.sr_attrs = anlist;
1537
1538                         /* NOTE: backend_operational() is also called
1539                          * when returning results, so it's supposed
1540                          * to do no harm to entries */
1541                         rs.sr_entry = e;
1542                         rc = backend_operational( op, &rs );
1543                         rs.sr_entry = NULL;
1544
1545                         if ( rc == LDAP_SUCCESS ) {
1546                                 if ( rs.sr_operational_attrs ) {
1547                                         freeattr = 1;
1548                                         a = rs.sr_operational_attrs;
1549
1550                                 } else {
1551                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1552                                 }
1553                         }
1554                 }
1555
1556                 if ( a ) {
1557                         BerVarray v;
1558
1559                         if ( op->o_conn && access > ACL_NONE &&
1560                                 access_allowed( op, e, entry_at, NULL,
1561                                                 access, &acl_state ) == 0 )
1562                         {
1563                                 rc = LDAP_INSUFFICIENT_ACCESS;
1564                                 goto freeit;
1565                         }
1566
1567                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1568                                 ;
1569
1570                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1571                                 op->o_tmpmemctx );
1572                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1573                         {
1574                                 if ( op->o_conn && access > ACL_NONE &&
1575                                         access_allowed( op, e, entry_at,
1576                                                         &a->a_nvals[i],
1577                                                         access,
1578                                                         &acl_state ) == 0 )
1579                                 {
1580                                         continue;
1581                                 }
1582                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1583                                                 op->o_tmpmemctx );
1584                                 if ( !BER_BVISNULL( &v[j] ) ) {
1585                                         j++;
1586                                 }
1587                         }
1588                         if ( j == 0 ) {
1589                                 op->o_tmpfree( v, op->o_tmpmemctx );
1590                                 *vals = NULL;
1591                                 rc = LDAP_INSUFFICIENT_ACCESS;
1592
1593                         } else {
1594                                 BER_BVZERO( &v[j] );
1595                                 *vals = v;
1596                                 rc = LDAP_SUCCESS;
1597                         }
1598                 }
1599 freeit:         if ( e != target ) {
1600                         op->o_private = e_priv;
1601                         be_entry_release_r( op, e );
1602                         op->o_private = o_priv;
1603                 }
1604                 if ( freeattr ) {
1605                         attr_free( a );
1606                 }
1607         }
1608
1609         op->o_bd = be;
1610         return rc;
1611 }
1612
1613 int
1614 backend_attribute(
1615         Operation *op,
1616         Entry   *target,
1617         struct berval   *edn,
1618         AttributeDescription *entry_at,
1619         BerVarray *vals,
1620         slap_access_t access )
1621 {
1622         int                     rc;
1623         BackendDB               *be_orig;
1624
1625         be_orig = op->o_bd;
1626         op->o_bd = frontendDB;
1627         rc = frontendDB->be_attribute( op, target, edn,
1628                 entry_at, vals, access );
1629         op->o_bd = be_orig;
1630
1631         return rc;
1632 }
1633
1634 int
1635 backend_access(
1636         Operation               *op,
1637         Entry                   *target,
1638         struct berval           *edn,
1639         AttributeDescription    *entry_at,
1640         struct berval           *nval,
1641         slap_access_t           access,
1642         slap_mask_t             *mask )
1643 {
1644         Entry           *e = NULL;
1645         void            *o_priv = op->o_private, *e_priv = NULL;
1646         int             rc = LDAP_INSUFFICIENT_ACCESS;
1647         Backend         *be = op->o_bd;
1648
1649         /* pedantic */
1650         assert( op != NULL );
1651         assert( op->o_conn != NULL );
1652         assert( edn != NULL );
1653         assert( access > ACL_NONE );
1654
1655         op->o_bd = select_backend( edn, 0 );
1656
1657         if ( target && dn_match( &target->e_nname, edn ) ) {
1658                 e = target;
1659
1660         } else {
1661                 op->o_private = NULL;
1662                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1663                 e_priv = op->o_private;
1664                 op->o_private = o_priv;
1665         }
1666
1667         if ( e ) {
1668                 Attribute       *a = NULL;
1669                 int             freeattr = 0;
1670
1671                 if ( entry_at == NULL ) {
1672                         entry_at = slap_schema.si_ad_entry;
1673                 }
1674
1675                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1676                 {
1677                         if ( access_allowed_mask( op, e, entry_at,
1678                                         NULL, access, NULL, mask ) == 0 )
1679                         {
1680                                 rc = LDAP_INSUFFICIENT_ACCESS;
1681
1682                         } else {
1683                                 rc = LDAP_SUCCESS;
1684                         }
1685
1686                 } else {
1687                         a = attr_find( e->e_attrs, entry_at );
1688                         if ( a == NULL ) {
1689                                 SlapReply       rs = { 0 };
1690                                 AttributeName   anlist[ 2 ];
1691
1692                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1693                                 anlist[ 0 ].an_desc = entry_at;
1694                                 BER_BVZERO( &anlist[ 1 ].an_name );
1695                                 rs.sr_attrs = anlist;
1696
1697                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1698
1699                                 /* NOTE: backend_operational() is also called
1700                                  * when returning results, so it's supposed
1701                                  * to do no harm to entries */
1702                                 rs.sr_entry = e;
1703                                 rc = backend_operational( op, &rs );
1704                                 rs.sr_entry = NULL;
1705
1706                                 if ( rc == LDAP_SUCCESS ) {
1707                                         if ( rs.sr_operational_attrs ) {
1708                                                 freeattr = 1;
1709                                                 a = rs.sr_operational_attrs;
1710
1711                                         } else {
1712                                                 rc = LDAP_NO_SUCH_OBJECT;
1713                                         }
1714                                 }
1715                         }
1716
1717                         if ( a ) {
1718                                 if ( access_allowed_mask( op, e, entry_at,
1719                                                 nval, access, NULL, mask ) == 0 )
1720                                 {
1721                                         rc = LDAP_INSUFFICIENT_ACCESS;
1722                                         goto freeit;
1723                                 }
1724                                 rc = LDAP_SUCCESS;
1725                         }
1726                 }
1727 freeit:         if ( e != target ) {
1728                         op->o_private = e_priv;
1729                         be_entry_release_r( op, e );
1730                         op->o_private = o_priv;
1731                 }
1732                 if ( freeattr ) {
1733                         attr_free( a );
1734                 }
1735         }
1736
1737         op->o_bd = be;
1738         return rc;
1739 }
1740
1741 int
1742 fe_aux_operational(
1743         Operation *op,
1744         SlapReply *rs )
1745 {
1746         Attribute               **ap;
1747         int                     rc = 0;
1748
1749         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1750                 /* just count them */ ;
1751
1752         /*
1753          * If operational attributes (allegedly) are required,
1754          * and the backend supports specific operational attributes,
1755          * add them to the attribute list
1756          */
1757         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1758                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1759                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1760         {
1761                 *ap = slap_operational_entryDN( rs->sr_entry );
1762                 ap = &(*ap)->a_next;
1763         }
1764
1765         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1766                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1767                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1768         {
1769                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1770                 ap = &(*ap)->a_next;
1771         }
1772
1773         if ( op->o_bd != NULL ) {
1774                 BackendDB               *be_orig = op->o_bd;
1775
1776                 /* Let the overlays have a chance at this */
1777                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1778                 if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1779                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1780                         op->o_bd->be_operational != NULL )
1781                 {
1782                         rc = op->o_bd->be_operational( op, rs );
1783                 }
1784                 op->o_bd = be_orig;
1785         }
1786
1787         return rc;
1788 }
1789
1790 int backend_operational( Operation *op, SlapReply *rs )
1791 {
1792         int rc;
1793         BackendDB *be_orig;
1794
1795         /* Moved this into the frontend so global overlays are called */
1796
1797         be_orig = op->o_bd;
1798         op->o_bd = frontendDB;
1799         rc = frontendDB->be_operational( op, rs );
1800         op->o_bd = be_orig;
1801
1802         return rc;
1803 }
1804