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 1998-2005 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
 252                 return backend_startup_one( be );
 253         }
 254
 255         /* open frontend, if required */
 256         if ( frontendDB->bd_info->bi_db_open ) {
 257                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 258                 if ( rc != 0 ) {
 259                         Debug( LDAP_DEBUG_ANY,
 260                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 261                                 rc, 0, 0 );
 262                         return rc;
 263                 }
 264         }
 265
 266         /* open each backend type */
 267         i = -1;
 268         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 269                 i++;
 270                 if( bi->bi_nDB == 0) {
 271                         /* no database of this type, don't open */
 272                         continue;
 273                 }
 274
 275                 if( bi->bi_open ) {
 276                         rc = bi->bi_open( bi );
 277                         if ( rc != 0 ) {
 278                                 Debug( LDAP_DEBUG_ANY,
 279                                         "backend_startup: bi_open %d (%s) failed!\n",
 280                                         i, bi->bi_type, 0 );
 281                                 return rc;
 282                         }
 283                 }
 284
 285                 (void)backend_init_controls( bi );
 286         }
 287
 288         /* open each backend database */
 289         i = -1;
 290         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 291                 i++;
 292                 if ( be->be_suffix == NULL ) {
 293                         Debug( LDAP_DEBUG_ANY,
 294                                 "backend_startup: warning, database %d (%s) "
 295                                 "has no suffix\n",
 296                                 i, be->bd_info->bi_type, 0 );
 297                 }
 298                 /* append global access controls */
 299                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 300
 301                 rc = backend_startup_one( be );
 302
 303                 if ( rc ) return rc;
 304         }
 305
 306         return rc;
 307 }
 308
 309 int backend_num( Backend *be )
 310 {
 311         int i = 0;
 312         BackendDB *b2;
 313
 314         if( be == NULL ) return -1;
 315
 316         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 317                 if( be == b2 ) return i;
 318                 i++;
 319         }
 320         return -1;
 321 }
 322
 323 int backend_shutdown( Backend *be )
 324 {
 325         int rc = 0;
 326         BackendInfo *bi;
 327
 328         if( be != NULL ) {
 329                 /* shutdown a specific backend database */
 330
 331                 if ( be->bd_info->bi_nDB == 0 ) {
 332                         /* no database of this type, we never opened it */
 333                         return 0;
 334                 }
 335
 336                 if ( be->bd_info->bi_db_close ) {
 337                         be->bd_info->bi_db_close( be );
 338                 }
 339
 340                 if( be->bd_info->bi_close ) {
 341                         be->bd_info->bi_close( be->bd_info );
 342                 }
 343
 344                 return 0;
 345         }
 346
 347         /* close each backend database */
 348         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 349                 if ( be->bd_info->bi_db_close ) {
 350                         be->bd_info->bi_db_close( be );
 351                 }
 352
 353                 if(rc != 0) {
 354                         Debug( LDAP_DEBUG_ANY,
 355                                 "backend_close: bi_db_close %s failed!\n",
 356                                 be->be_type, 0, 0 );
 357                 }
 358         }
 359
 360         /* close each backend type */
 361         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 362                 if( bi->bi_nDB == 0 ) {
 363                         /* no database of this type */
 364                         continue;
 365                 }
 366
 367                 if( bi->bi_close ) {
 368                         bi->bi_close( bi );
 369                 }
 370         }
 371
 372         /* close frontend, if required */
 373         if ( frontendDB->bd_info->bi_db_close ) {
 374                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 375                 if ( rc != 0 ) {
 376                         Debug( LDAP_DEBUG_ANY,
 377                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 378                                 rc, 0, 0 );
 379                 }
 380         }
 381
 382         return 0;
 383 }
 384
 385 void backend_destroy_one( BackendDB *bd, int dynamic )
 386 {
 387         if ( dynamic ) {
 388                 LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 389         }
 390
 391         if ( bd->be_syncinfo ) {
 392                 syncinfo_free( bd->be_syncinfo );
 393         }
 394
 395         if ( bd->be_pending_csn_list ) {
 396                 struct slap_csn_entry *csne;
 397                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 398                 while ( csne ) {
 399                         struct slap_csn_entry *tmp_csne = csne;
 400
 401                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 402                         ch_free( csne->ce_csn.bv_val );
 403                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 404                         ch_free( tmp_csne );
 405                 }
 406                 ch_free( bd->be_pending_csn_list );
 407         }
 408
 409         if ( bd->bd_info->bi_db_destroy ) {
 410                 bd->bd_info->bi_db_destroy( bd );
 411         }
 412         ber_bvarray_free( bd->be_suffix );
 413         ber_bvarray_free( bd->be_nsuffix );
 414         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 415                 free( bd->be_rootdn.bv_val );
 416         }
 417         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 418                 free( bd->be_rootndn.bv_val );
 419         }
 420         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 421                 free( bd->be_rootpw.bv_val );
 422         }
 423         acl_destroy( bd->be_acl, frontendDB->be_acl );
 424         if ( dynamic ) {
 425                 free( bd );
 426         }
 427 }
 428
 429 int backend_destroy(void)
 430 {
 431         BackendDB *bd;
 432         BackendInfo *bi;
 433
 434         /* destroy each backend database */
 435         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 436                 backend_destroy_one( bd, 1 );
 437         }
 438
 439         /* destroy each backend type */
 440         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 441                 if( bi->bi_destroy ) {
 442                         bi->bi_destroy( bi );
 443                 }
 444         }
 445
 446         nBackendInfo = 0;
 447         LDAP_STAILQ_INIT(&backendInfo);
 448
 449         /* destroy frontend database */
 450         bd = frontendDB;
 451         if ( bd ) {
 452                 if ( bd->bd_info->bi_db_destroy ) {
 453                         bd->bd_info->bi_db_destroy( bd );
 454                 }
 455                 ber_bvarray_free( bd->be_suffix );
 456                 ber_bvarray_free( bd->be_nsuffix );
 457                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 458                         free( bd->be_rootdn.bv_val );
 459                 }
 460                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 461                         free( bd->be_rootndn.bv_val );
 462                 }
 463                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 464                         free( bd->be_rootpw.bv_val );
 465                 }
 466                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 467         }
 468
 469         return 0;
 470 }
 471
 472 BackendInfo* backend_info(const char *type)
 473 {
 474         BackendInfo *bi;
 475
 476         /* search for the backend type */
 477         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 478                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 479                         return bi;
 480                 }
 481         }
 482
 483         return NULL;
 484 }
 485
 486
 487 BackendDB *
 488 backend_db_init(
 489     const char  *type )
 490 {
 491         Backend *be;
 492         BackendInfo *bi = backend_info(type);
 493         int     rc = 0;
 494
 495         if( bi == NULL ) {
 496                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 497                 return NULL;
 498         }
 499
 500         be = ch_calloc( 1, sizeof(Backend) );
 501         nbackends++;
 502         LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 503
 504         be->bd_info = bi;
 505
 506         be->be_def_limit = frontendDB->be_def_limit;
 507         be->be_dfltaccess = frontendDB->be_dfltaccess;
 508
 509         be->be_restrictops = frontendDB->be_restrictops;
 510         be->be_requires = frontendDB->be_requires;
 511         be->be_ssf_set = frontendDB->be_ssf_set;
 512
 513         be->be_pcl_mutexp = &be->be_pcl_mutex;
 514         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 515
 516         /* assign a default depth limit for alias deref */
 517         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 518
 519         if ( bi->bi_db_init ) {
 520                 rc = bi->bi_db_init( be );
 521         }
 522
 523         if ( rc != 0 ) {
 524                 fprintf( stderr, "database init failed (%s)\n", type );
 525                 nbackends--;
 526                 return NULL;
 527         }
 528
 529         bi->bi_nDB++;
 530         return( be );
 531 }
 532
 533 void
 534 be_db_close( void )
 535 {
 536         BackendDB *be;
 537
 538         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 539                 if ( be->bd_info->bi_db_close ) {
 540                         be->bd_info->bi_db_close( be );
 541                 }
 542         }
 543
 544         if ( frontendDB->bd_info->bi_db_close ) {
 545                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 546         }
 547
 548 }
 549
 550 Backend *
 551 select_backend(
 552         struct berval * dn,
 553         int manageDSAit,
 554         int noSubs )
 555 {
 556         int             j;
 557         ber_len_t       len, dnlen = dn->bv_len;
 558         Backend         *be, *b2 = NULL;
 559
 560         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 561                 if ( be->be_nsuffix == NULL ) {
 562                         continue;
 563                 }
 564
 565                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 566                 {
 567                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 568                         {
 569                                 continue;
 570                         }
 571
 572                         len = be->be_nsuffix[j].bv_len;
 573
 574                         if ( len > dnlen ) {
 575                                 /* suffix is longer than DN */
 576                                 continue;
 577                         }
 578
 579                         /*
 580                          * input DN is normalized, so the separator check
 581                          * need not look at escaping
 582                          */
 583                         if ( len && len < dnlen &&
 584                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 585                         {
 586                                 continue;
 587                         }
 588
 589                         if ( strcmp( be->be_nsuffix[j].bv_val,
 590                                 &dn->bv_val[dnlen-len] ) == 0 )
 591                         {
 592                                 if( b2 == NULL ) {
 593                                         b2 = be;
 594
 595                                         if( manageDSAit && len == dnlen &&
 596                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 597                                                 continue;
 598                                         }
 599                                 } else {
 600                                         b2 = be;
 601                                 }
 602                                 return b2;
 603                         }
 604                 }
 605         }
 606
 607         return b2;
 608 }
 609
 610 int
 611 be_issuffix(
 612     Backend *be,
 613     struct berval *bvsuffix )
 614 {
 615         int     i;
 616
 617         if ( be->be_nsuffix == NULL ) {
 618                 return 0;
 619         }
 620
 621         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 622                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 623                         return 1;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 int
 631 be_isroot_dn( Backend *be, struct berval *ndn )
 632 {
 633         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 634                 return 0;
 635         }
 636
 637         return dn_match( &be->be_rootndn, ndn );
 638 }
 639
 640 int
 641 be_slurp_update( Operation *op )
 642 {
 643         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 644                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 645 }
 646
 647 int
 648 be_shadow_update( Operation *op )
 649 {
 650         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 651                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 652 }
 653
 654 int
 655 be_isupdate_dn( Backend *be, struct berval *ndn )
 656 {
 657         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 658                 return 0;
 659         }
 660
 661         return dn_match( &be->be_update_ndn, ndn );
 662 }
 663
 664 struct berval *
 665 be_root_dn( Backend *be )
 666 {
 667         return &be->be_rootdn;
 668 }
 669
 670 int
 671 be_isroot( Operation *op )
 672 {
 673         return be_isroot_dn( op->o_bd, &op->o_ndn );
 674 }
 675
 676 int
 677 be_isroot_pw( Operation *op )
 678 {
 679         int result;
 680
 681         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 682                 return 0;
 683         }
 684
 685         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 686                 return 0;
 687         }
 688
 689 #ifdef SLAPD_SPASSWD
 690         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 691                 op->o_conn->c_sasl_authctx, NULL );
 692 #endif
 693
 694         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 695
 696 #ifdef SLAPD_SPASSWD
 697         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 698 #endif
 699
 700         return result == 0;
 701 }
 702
 703 int
 704 be_entry_release_rw(
 705         Operation *op,
 706         Entry *e,
 707         int rw )
 708 {
 709         if ( op->o_bd->be_release ) {
 710                 /* free and release entry from backend */
 711                 return op->o_bd->be_release( op, e, rw );
 712         } else {
 713                 /* free entry */
 714                 entry_free( e );
 715                 return 0;
 716         }
 717 }
 718
 719 int
 720 backend_unbind( Operation *op, SlapReply *rs )
 721 {
 722         BackendDB *be;
 723
 724         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 725                 if ( be->be_unbind ) {
 726                         op->o_bd = be;
 727                         be->be_unbind( op, rs );
 728                 }
 729         }
 730
 731         return 0;
 732 }
 733
 734 int
 735 backend_connection_init(
 736         Connection   *conn )
 737 {
 738         BackendDB *be;
 739
 740         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 741                 if ( be->be_connection_init ) {
 742                         be->be_connection_init( be, conn );
 743                 }
 744         }
 745
 746         return 0;
 747 }
 748
 749 int
 750 backend_connection_destroy(
 751         Connection   *conn )
 752 {
 753         BackendDB *be;
 754
 755         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 756                 if ( be->be_connection_destroy ) {
 757                         be->be_connection_destroy( be, conn);
 758                 }
 759         }
 760
 761         return 0;
 762 }
 763
 764 int
 765 backend_check_controls(
 766         Operation *op,
 767         SlapReply *rs )
 768 {
 769         LDAPControl **ctrls = op->o_ctrls;
 770         rs->sr_err = LDAP_SUCCESS;
 771
 772         if( ctrls ) {
 773                 for( ; *ctrls != NULL ; ctrls++ ) {
 774                         int cid;
 775
 776                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 777                         case LDAP_CONTROL_NOT_FOUND:
 778                                 /* unrecognized control */
 779                                 if ( (*ctrls)->ldctl_iscritical ) {
 780                                         /* should not be reachable */
 781                                         Debug( LDAP_DEBUG_ANY,
 782                                                 "backend_check_controls: unrecognized control: %s\n",
 783                                                 (*ctrls)->ldctl_oid, 0, 0 );
 784                                         assert( 0 );
 785                                 }
 786                                 break;
 787
 788                         case LDAP_COMPARE_FALSE:
 789                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 790                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 791                                          * is recognized and appropriate for the operation (which
 792                                          * we've already verified), then the server should make
 793                                          * use of the control when performing the operation.
 794                                          *
 795                                          * Here we find that operation extended by the control
 796                                          * is unavailable in a particular context, and the control
 797                                          * is marked Critical, hence the return of
 798                                          * unwillingToPerform.
 799                                          */
 800                                         rs->sr_text = "critical control unavailable in context";
 801                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 802                                         goto done;
 803                                 }
 804                                 break;
 805
 806                         case LDAP_COMPARE_TRUE:
 807                                 break;
 808
 809                         default:
 810                                 /* unreachable */
 811                                 Debug( LDAP_DEBUG_ANY,
 812                                         "backend_check_controls: unable to check control: %s\n",
 813                                         (*ctrls)->ldctl_oid, 0, 0 );
 814                                 assert( 0 );
 815
 816                                 rs->sr_text = "unable to check control";
 817                                 rs->sr_err = LDAP_OTHER;
 818                                 goto done;
 819                         }
 820                 }
 821         }
 822
 823         /* check should be generalized */
 824         if( get_manageDIT(op) && !be_isroot(op)) {
 825                 rs->sr_text = "requires manager authorization";
 826                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 827         }
 828
 829 done:;
 830         return rs->sr_err;
 831 }
 832
 833 int
 834 backend_check_restrictions(
 835         Operation *op,
 836         SlapReply *rs,
 837         struct berval *opdata )
 838 {
 839         slap_mask_t restrictops;
 840         slap_mask_t requires;
 841         slap_mask_t opflag;
 842         slap_mask_t exopflag = 0;
 843         slap_ssf_set_t *ssf;
 844         int updateop = 0;
 845         int starttls = 0;
 846         int session = 0;
 847
 848         if ( op->o_bd ) {
 849                 int     rc = SLAP_CB_CONTINUE;
 850
 851                 if ( op->o_bd->be_chk_controls ) {
 852                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 853                 }
 854
 855                 if ( rc == SLAP_CB_CONTINUE ) {
 856                         rc = backend_check_controls( op, rs );
 857                 }
 858
 859                 if ( rc != LDAP_SUCCESS ) {
 860                         return rs->sr_err;
 861                 }
 862
 863                 restrictops = op->o_bd->be_restrictops;
 864                 requires = op->o_bd->be_requires;
 865                 ssf = &op->o_bd->be_ssf_set;
 866
 867         } else {
 868                 restrictops = frontendDB->be_restrictops;
 869                 requires = frontendDB->be_requires;
 870                 ssf = &frontendDB->be_ssf_set;
 871         }
 872
 873         switch( op->o_tag ) {
 874         case LDAP_REQ_ADD:
 875                 opflag = SLAP_RESTRICT_OP_ADD;
 876                 updateop++;
 877                 break;
 878         case LDAP_REQ_BIND:
 879                 opflag = SLAP_RESTRICT_OP_BIND;
 880                 session++;
 881                 break;
 882         case LDAP_REQ_COMPARE:
 883                 opflag = SLAP_RESTRICT_OP_COMPARE;
 884                 break;
 885         case LDAP_REQ_DELETE:
 886                 updateop++;
 887                 opflag = SLAP_RESTRICT_OP_DELETE;
 888                 break;
 889         case LDAP_REQ_EXTENDED:
 890                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 891
 892                 if( !opdata ) {
 893                         /* treat unspecified as a modify */
 894                         opflag = SLAP_RESTRICT_OP_MODIFY;
 895                         updateop++;
 896                         break;
 897                 }
 898
 899                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 900                         session++;
 901                         starttls++;
 902                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 903                         break;
 904                 }
 905
 906                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 907                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 908                         break;
 909                 }
 910
 911                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 912                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 913                         break;
 914                 }
 915
 916                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 917                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 918                         updateop++;
 919                         break;
 920                 }
 921
 922                 /* treat everything else as a modify */
 923                 opflag = SLAP_RESTRICT_OP_MODIFY;
 924                 updateop++;
 925                 break;
 926
 927         case LDAP_REQ_MODIFY:
 928                 updateop++;
 929                 opflag = SLAP_RESTRICT_OP_MODIFY;
 930                 break;
 931         case LDAP_REQ_RENAME:
 932                 updateop++;
 933                 opflag = SLAP_RESTRICT_OP_RENAME;
 934                 break;
 935         case LDAP_REQ_SEARCH:
 936                 opflag = SLAP_RESTRICT_OP_SEARCH;
 937                 break;
 938         case LDAP_REQ_UNBIND:
 939                 session++;
 940                 opflag = 0;
 941                 break;
 942         default:
 943                 rs->sr_text = "restrict operations internal error";
 944                 rs->sr_err = LDAP_OTHER;
 945                 return rs->sr_err;
 946         }
 947
 948         if ( !starttls ) {
 949                 /* these checks don't apply to StartTLS */
 950
 951                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 952                 if( op->o_transport_ssf < ssf->sss_transport ) {
 953                         rs->sr_text = op->o_transport_ssf
 954                                 ? "stronger transport confidentiality required"
 955                                 : "transport confidentiality required";
 956                         return rs->sr_err;
 957                 }
 958
 959                 if( op->o_tls_ssf < ssf->sss_tls ) {
 960                         rs->sr_text = op->o_tls_ssf
 961                                 ? "stronger TLS confidentiality required"
 962                                 : "TLS confidentiality required";
 963                         return rs->sr_err;
 964                 }
 965
 966
 967                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 968                         /* simple bind specific check */
 969                         if( op->o_ssf < ssf->sss_simple_bind ) {
 970                                 rs->sr_text = op->o_ssf
 971                                         ? "stronger confidentiality required"
 972                                         : "confidentiality required";
 973                                 return rs->sr_err;
 974                         }
 975                 }
 976
 977                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 978                         /* these checks don't apply to SASL bind */
 979
 980                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 981                                 rs->sr_text = op->o_sasl_ssf
 982                                         ? "stronger SASL confidentiality required"
 983                                         : "SASL confidentiality required";
 984                                 return rs->sr_err;
 985                         }
 986
 987                         if( op->o_ssf < ssf->sss_ssf ) {
 988                                 rs->sr_text = op->o_ssf
 989                                         ? "stronger confidentiality required"
 990                                         : "confidentiality required";
 991                                 return rs->sr_err;
 992                         }
 993                 }
 994
 995                 if( updateop ) {
 996                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 997                                 rs->sr_text = op->o_transport_ssf
 998                                         ? "stronger transport confidentiality required for update"
 999                                         : "transport confidentiality required for update";
1000                                 return rs->sr_err;
1001                         }
1002
1003                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1004                                 rs->sr_text = op->o_tls_ssf
1005                                         ? "stronger TLS confidentiality required for update"
1006                                         : "TLS confidentiality required for update";
1007                                 return rs->sr_err;
1008                         }
1009
1010                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1011                                 rs->sr_text = op->o_sasl_ssf
1012                                         ? "stronger SASL confidentiality required for update"
1013                                         : "SASL confidentiality required for update";
1014                                 return rs->sr_err;
1015                         }
1016
1017                         if( op->o_ssf < ssf->sss_update_ssf ) {
1018                                 rs->sr_text = op->o_ssf
1019                                         ? "stronger confidentiality required for update"
1020                                         : "confidentiality required for update";
1021                                 return rs->sr_err;
1022                         }
1023
1024                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1025                                 BER_BVISEMPTY( &op->o_ndn ) )
1026                         {
1027                                 rs->sr_text = "modifications require authentication";
1028                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1029                                 return rs->sr_err;
1030                         }
1031
1032 #ifdef SLAP_X_LISTENER_MOD
1033                         if ( op->o_conn->c_listener &&
1034                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1035                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1036                         {
1037                                 /* no "w" mode means readonly */
1038                                 rs->sr_text = "modifications not allowed on this listener";
1039                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1040                                 return rs->sr_err;
1041                         }
1042 #endif /* SLAP_X_LISTENER_MOD */
1043                 }
1044         }
1045
1046         if ( !session ) {
1047                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1048
1049                 if( requires & SLAP_REQUIRE_STRONG ) {
1050                         /* should check mechanism */
1051                         if( ( op->o_transport_ssf < ssf->sss_transport
1052                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1053                                 || BER_BVISEMPTY( &op->o_dn ) )
1054                         {
1055                                 rs->sr_text = "strong(er) authentication required";
1056                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1057                                 return rs->sr_err;
1058                         }
1059                 }
1060
1061                 if( requires & SLAP_REQUIRE_SASL ) {
1062                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1063                                 rs->sr_text = "SASL authentication required";
1064                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1065                                 return rs->sr_err;
1066                         }
1067                 }
1068
1069                 if( requires & SLAP_REQUIRE_AUTHC ) {
1070                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1071                                 rs->sr_text = "authentication required";
1072                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1073                                 return rs->sr_err;
1074                         }
1075                 }
1076
1077                 if( requires & SLAP_REQUIRE_BIND ) {
1078                         int version;
1079                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1080                         version = op->o_conn->c_protocol;
1081                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1082
1083                         if( !version ) {
1084                                 /* no bind has occurred */
1085                                 rs->sr_text = "BIND required";
1086                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1087                                 return rs->sr_err;
1088                         }
1089                 }
1090
1091                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1092                         if( op->o_protocol < LDAP_VERSION3 ) {
1093                                 /* no bind has occurred */
1094                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1095                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1096                                 return rs->sr_err;
1097                         }
1098                 }
1099
1100 #ifdef SLAP_X_LISTENER_MOD
1101                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1102                         if ( op->o_conn->c_listener &&
1103                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1104                 {
1105                                 /* no "x" mode means bind required */
1106                                 rs->sr_text = "bind required on this listener";
1107                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1108                                 return rs->sr_err;
1109                         }
1110                 }
1111
1112                 if ( !starttls && !updateop ) {
1113                         if ( op->o_conn->c_listener &&
1114                                 !( op->o_conn->c_listener->sl_perms &
1115                                         ( !BER_BVISEMPTY( &op->o_dn )
1116                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1117                         {
1118                                 /* no "r" mode means no read */
1119                                 rs->sr_text = "read not allowed on this listener";
1120                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1121                                 return rs->sr_err;
1122                         }
1123                 }
1124 #endif /* SLAP_X_LISTENER_MOD */
1125
1126         }
1127
1128         if( ( restrictops & opflag )
1129                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1130                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1131                         rs->sr_text = "read operations restricted";
1132                 } else if ( restrictops & exopflag ) {
1133                         rs->sr_text = "extended operation restricted";
1134                 } else {
1135                         rs->sr_text = "operation restricted";
1136                 }
1137                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1138                 return rs->sr_err;
1139         }
1140
1141         rs->sr_err = LDAP_SUCCESS;
1142         return rs->sr_err;
1143 }
1144
1145 int backend_check_referrals( Operation *op, SlapReply *rs )
1146 {
1147         rs->sr_err = LDAP_SUCCESS;
1148
1149         if( op->o_bd->be_chk_referrals ) {
1150                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1151
1152                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1153                         send_ldap_result( op, rs );
1154                 }
1155         }
1156
1157         return rs->sr_err;
1158 }
1159
1160 int
1161 be_entry_get_rw(
1162         Operation *op,
1163         struct berval *ndn,
1164         ObjectClass *oc,
1165         AttributeDescription *at,
1166         int rw,
1167         Entry **e )
1168 {
1169         int rc;
1170
1171         *e = NULL;
1172
1173         if (op->o_bd == NULL) {
1174                 rc = LDAP_NO_SUCH_OBJECT;
1175         } else if ( op->o_bd->be_fetch ) {
1176                 rc = ( op->o_bd->be_fetch )( op, ndn,
1177                         oc, at, rw, e );
1178         } else {
1179                 rc = LDAP_UNWILLING_TO_PERFORM;
1180         }
1181         return rc;
1182 }
1183
1184 int
1185 backend_group(
1186         Operation *op,
1187         Entry   *target,
1188         struct berval *gr_ndn,
1189         struct berval *op_ndn,
1190         ObjectClass *group_oc,
1191         AttributeDescription *group_at )
1192 {
1193         Entry *e;
1194         Attribute *a;
1195         int rc;
1196         GroupAssertion *g;
1197         Backend *be = op->o_bd;
1198
1199         if ( op->o_abandon ) return SLAPD_ABANDON;
1200
1201         op->o_bd = select_backend( gr_ndn, 0, 0 );
1202
1203         for ( g = op->o_groups; g; g = g->ga_next ) {
1204                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1205                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1206                 {
1207                         continue;
1208                 }
1209                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1210                         break;
1211                 }
1212         }
1213
1214         if ( g ) {
1215                 rc = g->ga_res;
1216                 goto done;
1217         }
1218
1219         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1220                 e = target;
1221                 rc = 0;
1222         } else {
1223                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1224         }
1225         if ( e ) {
1226                 a = attr_find( e->e_attrs, group_at );
1227                 if ( a ) {
1228                         /* If the attribute is a subtype of labeledURI, treat this as
1229                          * a dynamic group ala groupOfURLs
1230                          */
1231                         if (is_at_subtype( group_at->ad_type,
1232                                 slap_schema.si_ad_labeledURI->ad_type ) )
1233                         {
1234                                 int i;
1235                                 LDAPURLDesc *ludp;
1236                                 struct berval bv, nbase;
1237                                 Filter *filter;
1238                                 Entry *user;
1239                                 Backend *b2 = op->o_bd;
1240
1241                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1242                                         user = target;
1243                                 } else {
1244                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1245                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1246                                 }
1247
1248                                 if ( rc == 0 ) {
1249                                         rc = LDAP_COMPARE_FALSE;
1250                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1251                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1252                                                         LDAP_URL_SUCCESS )
1253                                                 {
1254                                                         continue;
1255                                                 }
1256                                                 BER_BVZERO( &nbase );
1257                                                 /* host part must be empty */
1258                                                 /* attrs and extensions parts must be empty */
1259                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1260                                                         ludp->lud_attrs || ludp->lud_exts )
1261                                                 {
1262                                                         goto loopit;
1263                                                 }
1264                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1265                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1266                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1267                                                 {
1268                                                         goto loopit;
1269                                                 }
1270                                                 switch ( ludp->lud_scope ) {
1271                                                 case LDAP_SCOPE_BASE:
1272                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1273                                                                 goto loopit;
1274                                                         }
1275                                                         break;
1276                                                 case LDAP_SCOPE_ONELEVEL:
1277                                                         dnParent( op_ndn, &bv );
1278                                                         if ( !dn_match( &nbase, &bv ) ) {
1279                                                                 goto loopit;
1280                                                         }
1281                                                         break;
1282                                                 case LDAP_SCOPE_SUBTREE:
1283                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1284                                                                 goto loopit;
1285                                                         }
1286                                                         break;
1287 #ifdef LDAP_SCOPE_SUBORDINATE
1288                                                 case LDAP_SCOPE_SUBORDINATE:
1289                                                         if ( dn_match( &nbase, op_ndn ) ||
1290                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1291                                                         {
1292                                                                 goto loopit;
1293                                                         }
1294 #endif
1295                                                 }
1296                                                 filter = str2filter_x( op, ludp->lud_filter );
1297                                                 if ( filter ) {
1298                                                         if ( test_filter( NULL, user, filter ) ==
1299                                                                 LDAP_COMPARE_TRUE )
1300                                                         {
1301                                                                 rc = 0;
1302                                                         }
1303                                                         filter_free_x( op, filter );
1304                                                 }
1305 loopit:
1306                                                 ldap_free_urldesc( ludp );
1307                                                 if ( !BER_BVISNULL( &nbase ) ) {
1308                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1309                                                 }
1310                                                 if ( rc == 0 ) break;
1311                                         }
1312                                         if ( user != target ) {
1313                                                 be_entry_release_r( op, user );
1314                                         }
1315                                 }
1316                                 op->o_bd = b2;
1317                         } else {
1318                                 rc = value_find_ex( group_at,
1319                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1320                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1321                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1322                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1323                                         rc = LDAP_COMPARE_FALSE;
1324                         }
1325                 } else {
1326                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1327                 }
1328                 if (e != target ) {
1329                         be_entry_release_r( op, e );
1330                 }
1331         } else {
1332                 rc = LDAP_NO_SUCH_OBJECT;
1333         }
1334
1335         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1336                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1337                         op->o_tmpmemctx );
1338                 g->ga_be = op->o_bd;
1339                 g->ga_oc = group_oc;
1340                 g->ga_at = group_at;
1341                 g->ga_res = rc;
1342                 g->ga_len = gr_ndn->bv_len;
1343                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1344                 g->ga_next = op->o_groups;
1345                 op->o_groups = g;
1346         }
1347 done:
1348         op->o_bd = be;
1349         return rc;
1350 }
1351
1352 int
1353 backend_attribute(
1354         Operation *op,
1355         Entry   *target,
1356         struct berval   *edn,
1357         AttributeDescription *entry_at,
1358         BerVarray *vals,
1359         slap_access_t access )
1360 {
1361         Entry                   *e = NULL;
1362         Attribute               *a = NULL;
1363         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1364         AccessControlState      acl_state = ACL_STATE_INIT;
1365         Backend                 *be = op->o_bd;
1366
1367         op->o_bd = select_backend( edn, 0, 0 );
1368
1369         if ( target && dn_match( &target->e_nname, edn ) ) {
1370                 e = target;
1371
1372         } else {
1373                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1374         }
1375
1376         if ( e ) {
1377                 a = attr_find( e->e_attrs, entry_at );
1378                 if ( a == NULL ) {
1379                         SlapReply       rs = { 0 };
1380                         AttributeName   anlist[ 2 ];
1381
1382                         anlist[ 0 ].an_name = entry_at->ad_cname;
1383                         anlist[ 0 ].an_desc = entry_at;
1384                         BER_BVZERO( &anlist[ 1 ].an_name );
1385                         rs.sr_attrs = anlist;
1386
1387                         /* NOTE: backend_operational() is also called
1388                          * when returning results, so it's supposed
1389                          * to do no harm to entries */
1390                         rs.sr_entry = e;
1391                         rc = backend_operational( op, &rs );
1392                         rs.sr_entry = NULL;
1393
1394                         if ( rc == LDAP_SUCCESS ) {
1395                                 if ( rs.sr_operational_attrs ) {
1396                                         freeattr = 1;
1397                                         a = rs.sr_operational_attrs;
1398
1399                                 } else {
1400                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1401                                 }
1402                         }
1403                 }
1404
1405                 if ( a ) {
1406                         BerVarray v;
1407
1408                         if ( op->o_conn && access > ACL_NONE &&
1409                                 access_allowed( op, e, entry_at, NULL,
1410                                                 access, &acl_state ) == 0 )
1411                         {
1412                                 rc = LDAP_INSUFFICIENT_ACCESS;
1413                                 goto freeit;
1414                         }
1415
1416                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1417                                 ;
1418
1419                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1420                                 op->o_tmpmemctx );
1421                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1422                         {
1423                                 if ( op->o_conn && access > ACL_NONE &&
1424                                         access_allowed( op, e, entry_at,
1425                                                         &a->a_nvals[i],
1426                                                         access,
1427                                                         &acl_state ) == 0 )
1428                                 {
1429                                         continue;
1430                                 }
1431                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1432                                                 op->o_tmpmemctx );
1433                                 if ( !BER_BVISNULL( &v[j] ) ) {
1434                                         j++;
1435                                 }
1436                         }
1437                         if ( j == 0 ) {
1438                                 op->o_tmpfree( v, op->o_tmpmemctx );
1439                                 *vals = NULL;
1440                                 rc = LDAP_INSUFFICIENT_ACCESS;
1441
1442                         } else {
1443                                 BER_BVZERO( &v[j] );
1444                                 *vals = v;
1445                                 rc = LDAP_SUCCESS;
1446                         }
1447                 }
1448 freeit:         if ( e != target ) {
1449                         be_entry_release_r( op, e );
1450                 }
1451                 if ( freeattr ) {
1452                         attr_free( a );
1453                 }
1454         }
1455
1456         op->o_bd = be;
1457         return rc;
1458 }
1459
1460 int
1461 backend_access(
1462         Operation               *op,
1463         Entry                   *target,
1464         struct berval           *edn,
1465         AttributeDescription    *entry_at,
1466         struct berval           *nval,
1467         slap_access_t           access,
1468         slap_mask_t             *mask )
1469 {
1470         Entry           *e = NULL;
1471         int             rc = LDAP_INSUFFICIENT_ACCESS;
1472         Backend         *be = op->o_bd;
1473
1474         /* pedantic */
1475         assert( op != NULL );
1476         assert( op->o_conn != NULL );
1477         assert( edn != NULL );
1478         assert( access > ACL_NONE );
1479
1480         op->o_bd = select_backend( edn, 0, 0 );
1481
1482         if ( target && dn_match( &target->e_nname, edn ) ) {
1483                 e = target;
1484
1485         } else {
1486                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1487         }
1488
1489         if ( e ) {
1490                 Attribute       *a = NULL;
1491                 int             freeattr = 0;
1492
1493                 if ( entry_at == NULL ) {
1494                         entry_at = slap_schema.si_ad_entry;
1495                 }
1496
1497                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1498                 {
1499                         if ( access_allowed_mask( op, e, entry_at,
1500                                         NULL, access, NULL, mask ) == 0 )
1501                         {
1502                                 rc = LDAP_INSUFFICIENT_ACCESS;
1503
1504                         } else {
1505                                 rc = LDAP_SUCCESS;
1506                         }
1507
1508                 } else {
1509                         a = attr_find( e->e_attrs, entry_at );
1510                         if ( a == NULL ) {
1511                                 SlapReply       rs = { 0 };
1512                                 AttributeName   anlist[ 2 ];
1513
1514                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1515                                 anlist[ 0 ].an_desc = entry_at;
1516                                 BER_BVZERO( &anlist[ 1 ].an_name );
1517                                 rs.sr_attrs = anlist;
1518
1519                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1520
1521                                 /* NOTE: backend_operational() is also called
1522                                  * when returning results, so it's supposed
1523                                  * to do no harm to entries */
1524                                 rs.sr_entry = e;
1525                                 rc = backend_operational( op, &rs );
1526                                 rs.sr_entry = NULL;
1527
1528                                 if ( rc == LDAP_SUCCESS ) {
1529                                         if ( rs.sr_operational_attrs ) {
1530                                                 freeattr = 1;
1531                                                 a = rs.sr_operational_attrs;
1532
1533                                         } else {
1534                                                 rc = LDAP_NO_SUCH_OBJECT;
1535                                         }
1536                                 }
1537                         }
1538
1539                         if ( a ) {
1540                                 if ( access_allowed_mask( op, e, entry_at,
1541                                                 nval, access, NULL, mask ) == 0 )
1542                                 {
1543                                         rc = LDAP_INSUFFICIENT_ACCESS;
1544                                         goto freeit;
1545                                 }
1546                                 rc = LDAP_SUCCESS;
1547                         }
1548                 }
1549 freeit:         if ( e != target ) {
1550                         be_entry_release_r( op, e );
1551                 }
1552                 if ( freeattr ) {
1553                         attr_free( a );
1554                 }
1555         }
1556
1557         op->o_bd = be;
1558         return rc;
1559 }
1560
1561 int backend_operational( Operation *op, SlapReply *rs )
1562 {
1563         int rc;
1564         BackendDB *be_orig;
1565
1566         /* Moved this into the frontend so global overlays are called */
1567
1568         be_orig = op->o_bd;
1569         op->o_bd = frontendDB;
1570         rc = frontendDB->be_operational( op, rs );
1571         op->o_bd = be_orig;
1572
1573         return rc;
1574 }
1575