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         limits_destroy( bd->be_limits );
 425         if ( dynamic ) {
 426                 free( bd );
 427         }
 428 }
 429
 430 int backend_destroy(void)
 431 {
 432         BackendDB *bd;
 433         BackendInfo *bi;
 434
 435         /* destroy each backend database */
 436         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 437                 backend_destroy_one( bd, 1 );
 438         }
 439
 440         /* destroy each backend type */
 441         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 442                 if( bi->bi_destroy ) {
 443                         bi->bi_destroy( bi );
 444                 }
 445         }
 446
 447         nBackendInfo = 0;
 448         LDAP_STAILQ_INIT(&backendInfo);
 449
 450         /* destroy frontend database */
 451         bd = frontendDB;
 452         if ( bd ) {
 453                 if ( bd->bd_info->bi_db_destroy ) {
 454                         bd->bd_info->bi_db_destroy( bd );
 455                 }
 456                 ber_bvarray_free( bd->be_suffix );
 457                 ber_bvarray_free( bd->be_nsuffix );
 458                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 459                         free( bd->be_rootdn.bv_val );
 460                 }
 461                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 462                         free( bd->be_rootndn.bv_val );
 463                 }
 464                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 465                         free( bd->be_rootpw.bv_val );
 466                 }
 467                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 468         }
 469
 470         return 0;
 471 }
 472
 473 BackendInfo* backend_info(const char *type)
 474 {
 475         BackendInfo *bi;
 476
 477         /* search for the backend type */
 478         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 479                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 480                         return bi;
 481                 }
 482         }
 483
 484         return NULL;
 485 }
 486
 487
 488 BackendDB *
 489 backend_db_init(
 490     const char  *type )
 491 {
 492         Backend *be;
 493         BackendInfo *bi = backend_info(type);
 494         int     rc = 0;
 495
 496         if( bi == NULL ) {
 497                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 498                 return NULL;
 499         }
 500
 501         be = ch_calloc( 1, sizeof(Backend) );
 502         nbackends++;
 503         LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 504
 505         be->bd_info = bi;
 506
 507         be->be_def_limit = frontendDB->be_def_limit;
 508         be->be_dfltaccess = frontendDB->be_dfltaccess;
 509
 510         be->be_restrictops = frontendDB->be_restrictops;
 511         be->be_requires = frontendDB->be_requires;
 512         be->be_ssf_set = frontendDB->be_ssf_set;
 513
 514         be->be_pcl_mutexp = &be->be_pcl_mutex;
 515         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 516
 517         /* assign a default depth limit for alias deref */
 518         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 519
 520         if ( bi->bi_db_init ) {
 521                 rc = bi->bi_db_init( be );
 522         }
 523
 524         if ( rc != 0 ) {
 525                 fprintf( stderr, "database init failed (%s)\n", type );
 526                 nbackends--;
 527                 return NULL;
 528         }
 529
 530         bi->bi_nDB++;
 531         return( be );
 532 }
 533
 534 void
 535 be_db_close( void )
 536 {
 537         BackendDB *be;
 538
 539         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 540                 if ( be->bd_info->bi_db_close ) {
 541                         be->bd_info->bi_db_close( be );
 542                 }
 543         }
 544
 545         if ( frontendDB->bd_info->bi_db_close ) {
 546                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 547         }
 548
 549 }
 550
 551 Backend *
 552 select_backend(
 553         struct berval * dn,
 554         int manageDSAit,
 555         int noSubs )
 556 {
 557         int             j;
 558         ber_len_t       len, dnlen = dn->bv_len;
 559         Backend         *be, *b2 = NULL;
 560
 561         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 562                 if ( be->be_nsuffix == NULL ) {
 563                         continue;
 564                 }
 565
 566                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 567                 {
 568                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 569                         {
 570                                 continue;
 571                         }
 572
 573                         len = be->be_nsuffix[j].bv_len;
 574
 575                         if ( len > dnlen ) {
 576                                 /* suffix is longer than DN */
 577                                 continue;
 578                         }
 579
 580                         /*
 581                          * input DN is normalized, so the separator check
 582                          * need not look at escaping
 583                          */
 584                         if ( len && len < dnlen &&
 585                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 586                         {
 587                                 continue;
 588                         }
 589
 590                         if ( strcmp( be->be_nsuffix[j].bv_val,
 591                                 &dn->bv_val[dnlen-len] ) == 0 )
 592                         {
 593                                 if( b2 == NULL ) {
 594                                         b2 = be;
 595
 596                                         if( manageDSAit && len == dnlen &&
 597                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 598                                                 continue;
 599                                         }
 600                                 } else {
 601                                         b2 = be;
 602                                 }
 603                                 return b2;
 604                         }
 605                 }
 606         }
 607
 608         return b2;
 609 }
 610
 611 int
 612 be_issuffix(
 613     Backend *be,
 614     struct berval *bvsuffix )
 615 {
 616         int     i;
 617
 618         if ( be->be_nsuffix == NULL ) {
 619                 return 0;
 620         }
 621
 622         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 623                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 624                         return 1;
 625                 }
 626         }
 627
 628         return 0;
 629 }
 630
 631 int
 632 be_isroot_dn( Backend *be, struct berval *ndn )
 633 {
 634         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 635                 return 0;
 636         }
 637
 638         return dn_match( &be->be_rootndn, ndn );
 639 }
 640
 641 int
 642 be_slurp_update( Operation *op )
 643 {
 644         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 645                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 646 }
 647
 648 int
 649 be_shadow_update( Operation *op )
 650 {
 651         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 652                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 653 }
 654
 655 int
 656 be_isupdate_dn( Backend *be, struct berval *ndn )
 657 {
 658         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 659                 return 0;
 660         }
 661
 662         return dn_match( &be->be_update_ndn, ndn );
 663 }
 664
 665 struct berval *
 666 be_root_dn( Backend *be )
 667 {
 668         return &be->be_rootdn;
 669 }
 670
 671 int
 672 be_isroot( Operation *op )
 673 {
 674         return be_isroot_dn( op->o_bd, &op->o_ndn );
 675 }
 676
 677 int
 678 be_isroot_pw( Operation *op )
 679 {
 680         int result;
 681
 682         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 683                 return 0;
 684         }
 685
 686         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 687                 return 0;
 688         }
 689
 690 #ifdef SLAPD_SPASSWD
 691         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 692                 op->o_conn->c_sasl_authctx, NULL );
 693 #endif
 694
 695         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 696
 697 #ifdef SLAPD_SPASSWD
 698         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 699 #endif
 700
 701         return result == 0;
 702 }
 703
 704 int
 705 be_entry_release_rw(
 706         Operation *op,
 707         Entry *e,
 708         int rw )
 709 {
 710         if ( op->o_bd->be_release ) {
 711                 /* free and release entry from backend */
 712                 return op->o_bd->be_release( op, e, rw );
 713         } else {
 714                 /* free entry */
 715                 entry_free( e );
 716                 return 0;
 717         }
 718 }
 719
 720 int
 721 backend_unbind( Operation *op, SlapReply *rs )
 722 {
 723         BackendDB *be;
 724
 725         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 726                 if ( be->be_unbind ) {
 727                         op->o_bd = be;
 728                         be->be_unbind( op, rs );
 729                 }
 730         }
 731
 732         return 0;
 733 }
 734
 735 int
 736 backend_connection_init(
 737         Connection   *conn )
 738 {
 739         BackendDB *be;
 740
 741         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 742                 if ( be->be_connection_init ) {
 743                         be->be_connection_init( be, conn );
 744                 }
 745         }
 746
 747         return 0;
 748 }
 749
 750 int
 751 backend_connection_destroy(
 752         Connection   *conn )
 753 {
 754         BackendDB *be;
 755
 756         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 757                 if ( be->be_connection_destroy ) {
 758                         be->be_connection_destroy( be, conn);
 759                 }
 760         }
 761
 762         return 0;
 763 }
 764
 765 int
 766 backend_check_controls(
 767         Operation *op,
 768         SlapReply *rs )
 769 {
 770         LDAPControl **ctrls = op->o_ctrls;
 771         rs->sr_err = LDAP_SUCCESS;
 772
 773         if( ctrls ) {
 774                 for( ; *ctrls != NULL ; ctrls++ ) {
 775                         int cid;
 776
 777                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 778                         case LDAP_CONTROL_NOT_FOUND:
 779                                 /* unrecognized control */
 780                                 if ( (*ctrls)->ldctl_iscritical ) {
 781                                         /* should not be reachable */
 782                                         Debug( LDAP_DEBUG_ANY,
 783                                                 "backend_check_controls: unrecognized control: %s\n",
 784                                                 (*ctrls)->ldctl_oid, 0, 0 );
 785                                         assert( 0 );
 786                                 }
 787                                 break;
 788
 789                         case LDAP_COMPARE_FALSE:
 790                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 791                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 792                                          * is recognized and appropriate for the operation (which
 793                                          * we've already verified), then the server should make
 794                                          * use of the control when performing the operation.
 795                                          *
 796                                          * Here we find that operation extended by the control
 797                                          * is unavailable in a particular context, and the control
 798                                          * is marked Critical, hence the return of
 799                                          * unwillingToPerform.
 800                                          */
 801                                         rs->sr_text = "critical control unavailable in context";
 802                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 803                                         goto done;
 804                                 }
 805                                 break;
 806
 807                         case LDAP_COMPARE_TRUE:
 808                                 break;
 809
 810                         default:
 811                                 /* unreachable */
 812                                 Debug( LDAP_DEBUG_ANY,
 813                                         "backend_check_controls: unable to check control: %s\n",
 814                                         (*ctrls)->ldctl_oid, 0, 0 );
 815                                 assert( 0 );
 816
 817                                 rs->sr_text = "unable to check control";
 818                                 rs->sr_err = LDAP_OTHER;
 819                                 goto done;
 820                         }
 821                 }
 822         }
 823
 824         /* check should be generalized */
 825         if( get_manageDIT(op) && !be_isroot(op)) {
 826                 rs->sr_text = "requires manager authorization";
 827                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 828         }
 829
 830 done:;
 831         return rs->sr_err;
 832 }
 833
 834 int
 835 backend_check_restrictions(
 836         Operation *op,
 837         SlapReply *rs,
 838         struct berval *opdata )
 839 {
 840         slap_mask_t restrictops;
 841         slap_mask_t requires;
 842         slap_mask_t opflag;
 843         slap_mask_t exopflag = 0;
 844         slap_ssf_set_t *ssf;
 845         int updateop = 0;
 846         int starttls = 0;
 847         int session = 0;
 848
 849         if ( op->o_bd ) {
 850                 int     rc = SLAP_CB_CONTINUE;
 851
 852                 if ( op->o_bd->be_chk_controls ) {
 853                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 854                 }
 855
 856                 if ( rc == SLAP_CB_CONTINUE ) {
 857                         rc = backend_check_controls( op, rs );
 858                 }
 859
 860                 if ( rc != LDAP_SUCCESS ) {
 861                         return rs->sr_err;
 862                 }
 863
 864                 restrictops = op->o_bd->be_restrictops;
 865                 requires = op->o_bd->be_requires;
 866                 ssf = &op->o_bd->be_ssf_set;
 867
 868         } else {
 869                 restrictops = frontendDB->be_restrictops;
 870                 requires = frontendDB->be_requires;
 871                 ssf = &frontendDB->be_ssf_set;
 872         }
 873
 874         switch( op->o_tag ) {
 875         case LDAP_REQ_ADD:
 876                 opflag = SLAP_RESTRICT_OP_ADD;
 877                 updateop++;
 878                 break;
 879         case LDAP_REQ_BIND:
 880                 opflag = SLAP_RESTRICT_OP_BIND;
 881                 session++;
 882                 break;
 883         case LDAP_REQ_COMPARE:
 884                 opflag = SLAP_RESTRICT_OP_COMPARE;
 885                 break;
 886         case LDAP_REQ_DELETE:
 887                 updateop++;
 888                 opflag = SLAP_RESTRICT_OP_DELETE;
 889                 break;
 890         case LDAP_REQ_EXTENDED:
 891                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 892
 893                 if( !opdata ) {
 894                         /* treat unspecified as a modify */
 895                         opflag = SLAP_RESTRICT_OP_MODIFY;
 896                         updateop++;
 897                         break;
 898                 }
 899
 900                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 901                         session++;
 902                         starttls++;
 903                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 904                         break;
 905                 }
 906
 907                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 908                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 909                         break;
 910                 }
 911
 912                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 913                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 914                         break;
 915                 }
 916
 917                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 918                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 919                         updateop++;
 920                         break;
 921                 }
 922
 923                 /* treat everything else as a modify */
 924                 opflag = SLAP_RESTRICT_OP_MODIFY;
 925                 updateop++;
 926                 break;
 927
 928         case LDAP_REQ_MODIFY:
 929                 updateop++;
 930                 opflag = SLAP_RESTRICT_OP_MODIFY;
 931                 break;
 932         case LDAP_REQ_RENAME:
 933                 updateop++;
 934                 opflag = SLAP_RESTRICT_OP_RENAME;
 935                 break;
 936         case LDAP_REQ_SEARCH:
 937                 opflag = SLAP_RESTRICT_OP_SEARCH;
 938                 break;
 939         case LDAP_REQ_UNBIND:
 940                 session++;
 941                 opflag = 0;
 942                 break;
 943         default:
 944                 rs->sr_text = "restrict operations internal error";
 945                 rs->sr_err = LDAP_OTHER;
 946                 return rs->sr_err;
 947         }
 948
 949         if ( !starttls ) {
 950                 /* these checks don't apply to StartTLS */
 951
 952                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 953                 if( op->o_transport_ssf < ssf->sss_transport ) {
 954                         rs->sr_text = op->o_transport_ssf
 955                                 ? "stronger transport confidentiality required"
 956                                 : "transport confidentiality required";
 957                         return rs->sr_err;
 958                 }
 959
 960                 if( op->o_tls_ssf < ssf->sss_tls ) {
 961                         rs->sr_text = op->o_tls_ssf
 962                                 ? "stronger TLS confidentiality required"
 963                                 : "TLS confidentiality required";
 964                         return rs->sr_err;
 965                 }
 966
 967
 968                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 969                         /* simple bind specific check */
 970                         if( op->o_ssf < ssf->sss_simple_bind ) {
 971                                 rs->sr_text = op->o_ssf
 972                                         ? "stronger confidentiality required"
 973                                         : "confidentiality required";
 974                                 return rs->sr_err;
 975                         }
 976                 }
 977
 978                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 979                         /* these checks don't apply to SASL bind */
 980
 981                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 982                                 rs->sr_text = op->o_sasl_ssf
 983                                         ? "stronger SASL confidentiality required"
 984                                         : "SASL confidentiality required";
 985                                 return rs->sr_err;
 986                         }
 987
 988                         if( op->o_ssf < ssf->sss_ssf ) {
 989                                 rs->sr_text = op->o_ssf
 990                                         ? "stronger confidentiality required"
 991                                         : "confidentiality required";
 992                                 return rs->sr_err;
 993                         }
 994                 }
 995
 996                 if( updateop ) {
 997                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 998                                 rs->sr_text = op->o_transport_ssf
 999                                         ? "stronger transport confidentiality required for update"
1000                                         : "transport confidentiality required for update";
1001                                 return rs->sr_err;
1002                         }
1003
1004                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1005                                 rs->sr_text = op->o_tls_ssf
1006                                         ? "stronger TLS confidentiality required for update"
1007                                         : "TLS confidentiality required for update";
1008                                 return rs->sr_err;
1009                         }
1010
1011                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1012                                 rs->sr_text = op->o_sasl_ssf
1013                                         ? "stronger SASL confidentiality required for update"
1014                                         : "SASL confidentiality required for update";
1015                                 return rs->sr_err;
1016                         }
1017
1018                         if( op->o_ssf < ssf->sss_update_ssf ) {
1019                                 rs->sr_text = op->o_ssf
1020                                         ? "stronger confidentiality required for update"
1021                                         : "confidentiality required for update";
1022                                 return rs->sr_err;
1023                         }
1024
1025                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1026                                 BER_BVISEMPTY( &op->o_ndn ) )
1027                         {
1028                                 rs->sr_text = "modifications require authentication";
1029                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1030                                 return rs->sr_err;
1031                         }
1032
1033 #ifdef SLAP_X_LISTENER_MOD
1034                         if ( op->o_conn->c_listener &&
1035                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1036                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1037                         {
1038                                 /* no "w" mode means readonly */
1039                                 rs->sr_text = "modifications not allowed on this listener";
1040                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1041                                 return rs->sr_err;
1042                         }
1043 #endif /* SLAP_X_LISTENER_MOD */
1044                 }
1045         }
1046
1047         if ( !session ) {
1048                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1049
1050                 if( requires & SLAP_REQUIRE_STRONG ) {
1051                         /* should check mechanism */
1052                         if( ( op->o_transport_ssf < ssf->sss_transport
1053                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1054                                 || BER_BVISEMPTY( &op->o_dn ) )
1055                         {
1056                                 rs->sr_text = "strong(er) authentication required";
1057                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1058                                 return rs->sr_err;
1059                         }
1060                 }
1061
1062                 if( requires & SLAP_REQUIRE_SASL ) {
1063                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1064                                 rs->sr_text = "SASL authentication required";
1065                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1066                                 return rs->sr_err;
1067                         }
1068                 }
1069
1070                 if( requires & SLAP_REQUIRE_AUTHC ) {
1071                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1072                                 rs->sr_text = "authentication required";
1073                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1074                                 return rs->sr_err;
1075                         }
1076                 }
1077
1078                 if( requires & SLAP_REQUIRE_BIND ) {
1079                         int version;
1080                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1081                         version = op->o_conn->c_protocol;
1082                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1083
1084                         if( !version ) {
1085                                 /* no bind has occurred */
1086                                 rs->sr_text = "BIND required";
1087                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1088                                 return rs->sr_err;
1089                         }
1090                 }
1091
1092                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1093                         if( op->o_protocol < LDAP_VERSION3 ) {
1094                                 /* no bind has occurred */
1095                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1096                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1097                                 return rs->sr_err;
1098                         }
1099                 }
1100
1101 #ifdef SLAP_X_LISTENER_MOD
1102                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1103                         if ( op->o_conn->c_listener &&
1104                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1105                 {
1106                                 /* no "x" mode means bind required */
1107                                 rs->sr_text = "bind required on this listener";
1108                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1109                                 return rs->sr_err;
1110                         }
1111                 }
1112
1113                 if ( !starttls && !updateop ) {
1114                         if ( op->o_conn->c_listener &&
1115                                 !( op->o_conn->c_listener->sl_perms &
1116                                         ( !BER_BVISEMPTY( &op->o_dn )
1117                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1118                         {
1119                                 /* no "r" mode means no read */
1120                                 rs->sr_text = "read not allowed on this listener";
1121                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1122                                 return rs->sr_err;
1123                         }
1124                 }
1125 #endif /* SLAP_X_LISTENER_MOD */
1126
1127         }
1128
1129         if( ( restrictops & opflag )
1130                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1131                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1132                         rs->sr_text = "read operations restricted";
1133                 } else if ( restrictops & exopflag ) {
1134                         rs->sr_text = "extended operation restricted";
1135                 } else {
1136                         rs->sr_text = "operation restricted";
1137                 }
1138                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1139                 return rs->sr_err;
1140         }
1141
1142         rs->sr_err = LDAP_SUCCESS;
1143         return rs->sr_err;
1144 }
1145
1146 int backend_check_referrals( Operation *op, SlapReply *rs )
1147 {
1148         rs->sr_err = LDAP_SUCCESS;
1149
1150         if( op->o_bd->be_chk_referrals ) {
1151                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1152
1153                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1154                         send_ldap_result( op, rs );
1155                 }
1156         }
1157
1158         return rs->sr_err;
1159 }
1160
1161 int
1162 be_entry_get_rw(
1163         Operation *op,
1164         struct berval *ndn,
1165         ObjectClass *oc,
1166         AttributeDescription *at,
1167         int rw,
1168         Entry **e )
1169 {
1170         int rc;
1171
1172         *e = NULL;
1173
1174         if (op->o_bd == NULL) {
1175                 rc = LDAP_NO_SUCH_OBJECT;
1176         } else if ( op->o_bd->be_fetch ) {
1177                 rc = ( op->o_bd->be_fetch )( op, ndn,
1178                         oc, at, rw, e );
1179         } else {
1180                 rc = LDAP_UNWILLING_TO_PERFORM;
1181         }
1182         return rc;
1183 }
1184
1185 int
1186 fe_acl_group(
1187         Operation *op,
1188         Entry   *target,
1189         struct berval *gr_ndn,
1190         struct berval *op_ndn,
1191         ObjectClass *group_oc,
1192         AttributeDescription *group_at )
1193 {
1194         Entry *e;
1195         Attribute *a;
1196         int rc;
1197         GroupAssertion *g;
1198         Backend *be = op->o_bd;
1199
1200         op->o_bd = select_backend( gr_ndn, 0, 0 );
1201
1202         for ( g = op->o_groups; g; g = g->ga_next ) {
1203                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1204                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1205                 {
1206                         continue;
1207                 }
1208                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1209                         break;
1210                 }
1211         }
1212
1213         if ( g ) {
1214                 rc = g->ga_res;
1215                 goto done;
1216         }
1217
1218         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1219                 e = target;
1220                 rc = 0;
1221         } else {
1222                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1223         }
1224         if ( e ) {
1225                 a = attr_find( e->e_attrs, group_at );
1226                 if ( a ) {
1227                         /* If the attribute is a subtype of labeledURI, treat this as
1228                          * a dynamic group ala groupOfURLs
1229                          */
1230                         if (is_at_subtype( group_at->ad_type,
1231                                 slap_schema.si_ad_labeledURI->ad_type ) )
1232                         {
1233                                 int i;
1234                                 LDAPURLDesc *ludp;
1235                                 struct berval bv, nbase;
1236                                 Filter *filter;
1237                                 Entry *user;
1238                                 Backend *b2 = op->o_bd;
1239
1240                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1241                                         user = target;
1242                                 } else {
1243                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1244                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1245                                 }
1246
1247                                 if ( rc == 0 ) {
1248                                         rc = LDAP_COMPARE_FALSE;
1249                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1250                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1251                                                         LDAP_URL_SUCCESS )
1252                                                 {
1253                                                         continue;
1254                                                 }
1255                                                 BER_BVZERO( &nbase );
1256                                                 /* host part must be empty */
1257                                                 /* attrs and extensions parts must be empty */
1258                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1259                                                         ludp->lud_attrs || ludp->lud_exts )
1260                                                 {
1261                                                         goto loopit;
1262                                                 }
1263                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1264                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1265                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1266                                                 {
1267                                                         goto loopit;
1268                                                 }
1269                                                 switch ( ludp->lud_scope ) {
1270                                                 case LDAP_SCOPE_BASE:
1271                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1272                                                                 goto loopit;
1273                                                         }
1274                                                         break;
1275                                                 case LDAP_SCOPE_ONELEVEL:
1276                                                         dnParent( op_ndn, &bv );
1277                                                         if ( !dn_match( &nbase, &bv ) ) {
1278                                                                 goto loopit;
1279                                                         }
1280                                                         break;
1281                                                 case LDAP_SCOPE_SUBTREE:
1282                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1283                                                                 goto loopit;
1284                                                         }
1285                                                         break;
1286 #ifdef LDAP_SCOPE_SUBORDINATE
1287                                                 case LDAP_SCOPE_SUBORDINATE:
1288                                                         if ( dn_match( &nbase, op_ndn ) ||
1289                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1290                                                         {
1291                                                                 goto loopit;
1292                                                         }
1293 #endif
1294                                                 }
1295                                                 filter = str2filter_x( op, ludp->lud_filter );
1296                                                 if ( filter ) {
1297                                                         if ( test_filter( NULL, user, filter ) ==
1298                                                                 LDAP_COMPARE_TRUE )
1299                                                         {
1300                                                                 rc = 0;
1301                                                         }
1302                                                         filter_free_x( op, filter );
1303                                                 }
1304 loopit:
1305                                                 ldap_free_urldesc( ludp );
1306                                                 if ( !BER_BVISNULL( &nbase ) ) {
1307                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1308                                                 }
1309                                                 if ( rc == 0 ) break;
1310                                         }
1311                                         if ( user != target ) {
1312                                                 be_entry_release_r( op, user );
1313                                         }
1314                                 }
1315                                 op->o_bd = b2;
1316                         } else {
1317                                 rc = value_find_ex( group_at,
1318                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1319                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1320                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1321                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1322                                         rc = LDAP_COMPARE_FALSE;
1323                         }
1324                 } else {
1325                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1326                 }
1327                 if (e != target ) {
1328                         be_entry_release_r( op, e );
1329                 }
1330         } else {
1331                 rc = LDAP_NO_SUCH_OBJECT;
1332         }
1333
1334         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1335                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1336                         op->o_tmpmemctx );
1337                 g->ga_be = op->o_bd;
1338                 g->ga_oc = group_oc;
1339                 g->ga_at = group_at;
1340                 g->ga_res = rc;
1341                 g->ga_len = gr_ndn->bv_len;
1342                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1343                 g->ga_next = op->o_groups;
1344                 op->o_groups = g;
1345         }
1346 done:
1347         op->o_bd = be;
1348         return rc;
1349 }
1350
1351 int
1352 backend_group(
1353         Operation *op,
1354         Entry   *target,
1355         struct berval *gr_ndn,
1356         struct berval *op_ndn,
1357         ObjectClass *group_oc,
1358         AttributeDescription *group_at )
1359 {
1360         int                     rc;
1361         BackendDB               *be_orig;
1362
1363         if ( op->o_abandon ) {
1364                 return SLAPD_ABANDON;
1365         }
1366
1367         be_orig = op->o_bd;
1368         op->o_bd = frontendDB;
1369         rc = frontendDB->be_group( op, target, gr_ndn,
1370                 op_ndn, group_oc, group_at );
1371         op->o_bd = be_orig;
1372
1373         return rc;
1374 }
1375
1376 int
1377 fe_acl_attribute(
1378         Operation *op,
1379         Entry   *target,
1380         struct berval   *edn,
1381         AttributeDescription *entry_at,
1382         BerVarray *vals,
1383         slap_access_t access )
1384 {
1385         Entry                   *e = NULL;
1386         Attribute               *a = NULL;
1387         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1388         AccessControlState      acl_state = ACL_STATE_INIT;
1389         Backend                 *be = op->o_bd;
1390
1391         op->o_bd = select_backend( edn, 0, 0 );
1392
1393         if ( target && dn_match( &target->e_nname, edn ) ) {
1394                 e = target;
1395
1396         } else {
1397                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1398         }
1399
1400         if ( e ) {
1401                 a = attr_find( e->e_attrs, entry_at );
1402                 if ( a == NULL ) {
1403                         SlapReply       rs = { 0 };
1404                         AttributeName   anlist[ 2 ];
1405
1406                         anlist[ 0 ].an_name = entry_at->ad_cname;
1407                         anlist[ 0 ].an_desc = entry_at;
1408                         BER_BVZERO( &anlist[ 1 ].an_name );
1409                         rs.sr_attrs = anlist;
1410
1411                         /* NOTE: backend_operational() is also called
1412                          * when returning results, so it's supposed
1413                          * to do no harm to entries */
1414                         rs.sr_entry = e;
1415                         rc = backend_operational( op, &rs );
1416                         rs.sr_entry = NULL;
1417
1418                         if ( rc == LDAP_SUCCESS ) {
1419                                 if ( rs.sr_operational_attrs ) {
1420                                         freeattr = 1;
1421                                         a = rs.sr_operational_attrs;
1422
1423                                 } else {
1424                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1425                                 }
1426                         }
1427                 }
1428
1429                 if ( a ) {
1430                         BerVarray v;
1431
1432                         if ( op->o_conn && access > ACL_NONE &&
1433                                 access_allowed( op, e, entry_at, NULL,
1434                                                 access, &acl_state ) == 0 )
1435                         {
1436                                 rc = LDAP_INSUFFICIENT_ACCESS;
1437                                 goto freeit;
1438                         }
1439
1440                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1441                                 ;
1442
1443                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1444                                 op->o_tmpmemctx );
1445                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1446                         {
1447                                 if ( op->o_conn && access > ACL_NONE &&
1448                                         access_allowed( op, e, entry_at,
1449                                                         &a->a_nvals[i],
1450                                                         access,
1451                                                         &acl_state ) == 0 )
1452                                 {
1453                                         continue;
1454                                 }
1455                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1456                                                 op->o_tmpmemctx );
1457                                 if ( !BER_BVISNULL( &v[j] ) ) {
1458                                         j++;
1459                                 }
1460                         }
1461                         if ( j == 0 ) {
1462                                 op->o_tmpfree( v, op->o_tmpmemctx );
1463                                 *vals = NULL;
1464                                 rc = LDAP_INSUFFICIENT_ACCESS;
1465
1466                         } else {
1467                                 BER_BVZERO( &v[j] );
1468                                 *vals = v;
1469                                 rc = LDAP_SUCCESS;
1470                         }
1471                 }
1472 freeit:         if ( e != target ) {
1473                         be_entry_release_r( op, e );
1474                 }
1475                 if ( freeattr ) {
1476                         attr_free( a );
1477                 }
1478         }
1479
1480         op->o_bd = be;
1481         return rc;
1482 }
1483
1484 int
1485 backend_attribute(
1486         Operation *op,
1487         Entry   *target,
1488         struct berval   *edn,
1489         AttributeDescription *entry_at,
1490         BerVarray *vals,
1491         slap_access_t access )
1492 {
1493         int                     rc;
1494         BackendDB               *be_orig;
1495
1496         be_orig = op->o_bd;
1497         op->o_bd = frontendDB;
1498         rc = frontendDB->be_attribute( op, target, edn,
1499                 entry_at, vals, access );
1500         op->o_bd = be_orig;
1501
1502         return rc;
1503 }
1504
1505 int
1506 backend_access(
1507         Operation               *op,
1508         Entry                   *target,
1509         struct berval           *edn,
1510         AttributeDescription    *entry_at,
1511         struct berval           *nval,
1512         slap_access_t           access,
1513         slap_mask_t             *mask )
1514 {
1515         Entry           *e = NULL;
1516         int             rc = LDAP_INSUFFICIENT_ACCESS;
1517         Backend         *be = op->o_bd;
1518
1519         /* pedantic */
1520         assert( op != NULL );
1521         assert( op->o_conn != NULL );
1522         assert( edn != NULL );
1523         assert( access > ACL_NONE );
1524
1525         op->o_bd = select_backend( edn, 0, 0 );
1526
1527         if ( target && dn_match( &target->e_nname, edn ) ) {
1528                 e = target;
1529
1530         } else {
1531                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1532         }
1533
1534         if ( e ) {
1535                 Attribute       *a = NULL;
1536                 int             freeattr = 0;
1537
1538                 if ( entry_at == NULL ) {
1539                         entry_at = slap_schema.si_ad_entry;
1540                 }
1541
1542                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1543                 {
1544                         if ( access_allowed_mask( op, e, entry_at,
1545                                         NULL, access, NULL, mask ) == 0 )
1546                         {
1547                                 rc = LDAP_INSUFFICIENT_ACCESS;
1548
1549                         } else {
1550                                 rc = LDAP_SUCCESS;
1551                         }
1552
1553                 } else {
1554                         a = attr_find( e->e_attrs, entry_at );
1555                         if ( a == NULL ) {
1556                                 SlapReply       rs = { 0 };
1557                                 AttributeName   anlist[ 2 ];
1558
1559                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1560                                 anlist[ 0 ].an_desc = entry_at;
1561                                 BER_BVZERO( &anlist[ 1 ].an_name );
1562                                 rs.sr_attrs = anlist;
1563
1564                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1565
1566                                 /* NOTE: backend_operational() is also called
1567                                  * when returning results, so it's supposed
1568                                  * to do no harm to entries */
1569                                 rs.sr_entry = e;
1570                                 rc = backend_operational( op, &rs );
1571                                 rs.sr_entry = NULL;
1572
1573                                 if ( rc == LDAP_SUCCESS ) {
1574                                         if ( rs.sr_operational_attrs ) {
1575                                                 freeattr = 1;
1576                                                 a = rs.sr_operational_attrs;
1577
1578                                         } else {
1579                                                 rc = LDAP_NO_SUCH_OBJECT;
1580                                         }
1581                                 }
1582                         }
1583
1584                         if ( a ) {
1585                                 if ( access_allowed_mask( op, e, entry_at,
1586                                                 nval, access, NULL, mask ) == 0 )
1587                                 {
1588                                         rc = LDAP_INSUFFICIENT_ACCESS;
1589                                         goto freeit;
1590                                 }
1591                                 rc = LDAP_SUCCESS;
1592                         }
1593                 }
1594 freeit:         if ( e != target ) {
1595                         be_entry_release_r( op, e );
1596                 }
1597                 if ( freeattr ) {
1598                         attr_free( a );
1599                 }
1600         }
1601
1602         op->o_bd = be;
1603         return rc;
1604 }
1605
1606 int
1607 fe_aux_operational(
1608         Operation *op,
1609         SlapReply *rs )
1610 {
1611         Attribute               **ap;
1612         int                     rc = 0;
1613         BackendDB               *be_orig;
1614
1615         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1616                 /* just count them */ ;
1617
1618         /*
1619          * If operational attributes (allegedly) are required,
1620          * and the backend supports specific operational attributes,
1621          * add them to the attribute list
1622          */
1623         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1624                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) )
1625         {
1626                 *ap = slap_operational_entryDN( rs->sr_entry );
1627                 ap = &(*ap)->a_next;
1628         }
1629
1630         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1631                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) )
1632         {
1633                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1634                 ap = &(*ap)->a_next;
1635         }
1636
1637         if ( op->o_bd != NULL && op->o_bd != frontendDB )
1638         {
1639                 /* Let the overlays have a chance at this */
1640                 be_orig = op->o_bd;
1641                 op->o_bd = select_backend( &op->o_ndn, 0, 0 );
1642
1643                 if ( ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1644                         op->o_bd != NULL && op->o_bd->be_operational != NULL )
1645                 {
1646                         rc = op->o_bd->be_operational( op, rs );
1647                 }
1648                 op->o_bd = be_orig;
1649         }
1650
1651         return rc;
1652 }
1653
1654 int backend_operational( Operation *op, SlapReply *rs )
1655 {
1656         int rc;
1657         BackendDB *be_orig;
1658
1659         /* Moved this into the frontend so global overlays are called */
1660
1661         be_orig = op->o_bd;
1662         op->o_bd = frontendDB;
1663         rc = frontendDB->be_operational( op, rs );
1664         op->o_bd = be_orig;
1665
1666         return rc;
1667 }
1668