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

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2007 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 /*
  41  * If a module is configured as dynamic, its header should not
  42  * get included into slapd. While this is a general rule and does
  43  * not have much of an effect in UNIX, this rule should be adhered
  44  * to for Windows, where dynamic object code should not be implicitly
  45  * imported into slapd without appropriate __declspec(dllimport) directives.
  46  */
  47
  48 int                     nBackendInfo = 0;
  49 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  50
  51 int                     nBackendDB = 0;
  52 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  53
  54 static int
  55 backend_init_controls( BackendInfo *bi )
  56 {
  57         if ( bi->bi_controls ) {
  58                 int     i;
  59
  60                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  61                         int     cid;
  62
  63                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  64                                         == LDAP_CONTROL_NOT_FOUND )
  65                         {
  66                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  67                                         assert( 0 );
  68                                 }
  69
  70                                 return -1;
  71                         }
  72
  73                         bi->bi_ctrls[ cid ] = 1;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 int backend_init(void)
  81 {
  82         int rc = -1;
  83         BackendInfo *bi;
  84
  85         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  86                 /* already initialized */
  87                 Debug( LDAP_DEBUG_ANY,
  88                         "backend_init: already initialized\n", 0, 0, 0 );
  89                 return -1;
  90         }
  91
  92         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  93                 assert( bi->bi_init != 0 );
  94
  95                 rc = bi->bi_init( bi );
  96
  97                 if(rc != 0) {
  98                         Debug( LDAP_DEBUG_ANY,
  99                                 "backend_init: initialized for type \"%s\"\n",
 100                                 bi->bi_type, 0, 0 );
 101                         /* destroy those we've already inited */
 102                         for( nBackendInfo--;
 103                                 nBackendInfo >= 0 ;
 104                                 nBackendInfo-- )
 105                         {
 106                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 107                                         slap_binfo[nBackendInfo].bi_destroy(
 108                                                 &slap_binfo[nBackendInfo] );
 109                                 }
 110                         }
 111                         return rc;
 112                 }
 113
 114                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 115         }
 116
 117         if ( nBackendInfo > 0) {
 118                 return 0;
 119         }
 120
 121 #ifdef SLAPD_MODULES
 122         return 0;
 123 #else
 124
 125         Debug( LDAP_DEBUG_ANY,
 126                 "backend_init: failed\n",
 127                 0, 0, 0 );
 128
 129         return rc;
 130 #endif /* SLAPD_MODULES */
 131 }
 132
 133 int backend_add(BackendInfo *aBackendInfo)
 134 {
 135         int rc = 0;
 136
 137         if ( aBackendInfo->bi_init == NULL ) {
 138                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 139                         "backend type \"%s\" does not have the (mandatory)init function\n",
 140                         aBackendInfo->bi_type, 0, 0 );
 141                 return -1;
 142         }
 143
 144         rc = aBackendInfo->bi_init(aBackendInfo);
 145         if ( rc != 0) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_add:  initialization for type \"%s\" failed\n",
 148                         aBackendInfo->bi_type, 0, 0 );
 149                 return rc;
 150         }
 151
 152         (void)backend_init_controls( aBackendInfo );
 153
 154         /* now add the backend type to the Backend Info List */
 155         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 156         nBackendInfo++;
 157         return 0;
 158 }
 159
 160 static int
 161 backend_set_controls( BackendDB *be )
 162 {
 163         BackendInfo     *bi = be->bd_info;
 164
 165         /* back-relay takes care of itself; so may do other */
 166         if ( overlay_is_over( be ) ) {
 167                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 168         }
 169
 170         if ( bi->bi_controls ) {
 171                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 172                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 173                                         sizeof( be->be_ctrls ) );
 174                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 175
 176                 } else {
 177                         int     i;
 178
 179                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 180                                 if ( bi->bi_ctrls[ i ] ) {
 181                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 182                                 }
 183                         }
 184                 }
 185
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* startup a specific backend database */
 192 int backend_startup_one(Backend *be)
 193 {
 194         int             rc = 0;
 195
 196         assert( be != NULL );
 197
 198         be->be_pending_csn_list = (struct be_pcl *)
 199                 ch_calloc( 1, sizeof( struct be_pcl ) );
 200
 201         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 202
 203         Debug( LDAP_DEBUG_TRACE,
 204                 "backend_startup_one: starting \"%s\"\n",
 205                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 206                 0, 0 );
 207
 208         /* set database controls */
 209         (void)backend_set_controls( be );
 210
 211         if ( be->bd_info->bi_db_open ) {
 212                 rc = be->bd_info->bi_db_open( be );
 213                 if ( rc == 0 ) {
 214                         (void)backend_set_controls( be );
 215
 216                 } else {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 219                                 rc, 0, 0 );
 220                 }
 221         }
 222
 223         return rc;
 224 }
 225
 226 int backend_startup(Backend *be)
 227 {
 228         int i;
 229         int rc = 0;
 230         BackendInfo *bi;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "backend_startup: %d databases to startup.\n",
 236                         nBackendDB, 0, 0 );
 237                 return 1;
 238         }
 239
 240         if(be != NULL) {
 241                 if ( be->bd_info->bi_open ) {
 242                         rc = be->bd_info->bi_open( be->bd_info );
 243                         if ( rc != 0 ) {
 244                                 Debug( LDAP_DEBUG_ANY,
 245                                         "backend_startup: bi_open failed!\n",
 246                                         0, 0, 0 );
 247
 248                                 return rc;
 249                         }
 250                 }
 251                 /* append global access controls */
 252                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 253                 return backend_startup_one( be );
 254         }
 255
 256         /* open frontend, if required */
 257         if ( frontendDB->bd_info->bi_db_open ) {
 258                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 259                 if ( rc != 0 ) {
 260                         Debug( LDAP_DEBUG_ANY,
 261                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 262                                 rc, 0, 0 );
 263                         return rc;
 264                 }
 265         }
 266
 267         /* open each backend type */
 268         i = -1;
 269         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 270                 i++;
 271                 if( bi->bi_nDB == 0) {
 272                         /* no database of this type, don't open */
 273                         continue;
 274                 }
 275
 276                 if( bi->bi_open ) {
 277                         rc = bi->bi_open( bi );
 278                         if ( rc != 0 ) {
 279                                 Debug( LDAP_DEBUG_ANY,
 280                                         "backend_startup: bi_open %d (%s) failed!\n",
 281                                         i, bi->bi_type, 0 );
 282                                 return rc;
 283                         }
 284                 }
 285
 286                 (void)backend_init_controls( bi );
 287         }
 288
 289         /* open each backend database */
 290         i = -1;
 291         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 292                 i++;
 293                 if ( be->be_suffix == NULL ) {
 294                         Debug( LDAP_DEBUG_ANY,
 295                                 "backend_startup: warning, database %d (%s) "
 296                                 "has no suffix\n",
 297                                 i, be->bd_info->bi_type, 0 );
 298                 }
 299                 /* append global access controls */
 300                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 301
 302                 rc = backend_startup_one( be );
 303
 304                 if ( rc ) return rc;
 305         }
 306
 307         return rc;
 308 }
 309
 310 int backend_num( Backend *be )
 311 {
 312         int i = 0;
 313         BackendDB *b2;
 314
 315         if( be == NULL ) return -1;
 316
 317         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 318                 if( be == b2 ) return i;
 319                 i++;
 320         }
 321         return -1;
 322 }
 323
 324 int backend_shutdown( Backend *be )
 325 {
 326         int rc = 0;
 327         BackendInfo *bi;
 328
 329         if( be != NULL ) {
 330                 /* shutdown a specific backend database */
 331
 332                 if ( be->bd_info->bi_nDB == 0 ) {
 333                         /* no database of this type, we never opened it */
 334                         return 0;
 335                 }
 336
 337                 if ( be->bd_info->bi_db_close ) {
 338                         be->bd_info->bi_db_close( be );
 339                 }
 340
 341                 if( be->bd_info->bi_close ) {
 342                         be->bd_info->bi_close( be->bd_info );
 343                 }
 344
 345                 return 0;
 346         }
 347
 348         /* close each backend database */
 349         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 350                 if ( be->bd_info->bi_db_close ) {
 351                         be->bd_info->bi_db_close( be );
 352                 }
 353
 354                 if(rc != 0) {
 355                         Debug( LDAP_DEBUG_ANY,
 356                                 "backend_close: bi_db_close %s failed!\n",
 357                                 be->be_type, 0, 0 );
 358                 }
 359         }
 360
 361         /* close each backend type */
 362         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 363                 if( bi->bi_nDB == 0 ) {
 364                         /* no database of this type */
 365                         continue;
 366                 }
 367
 368                 if( bi->bi_close ) {
 369                         bi->bi_close( bi );
 370                 }
 371         }
 372
 373         /* close frontend, if required */
 374         if ( frontendDB->bd_info->bi_db_close ) {
 375                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 376                 if ( rc != 0 ) {
 377                         Debug( LDAP_DEBUG_ANY,
 378                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 379                                 rc, 0, 0 );
 380                 }
 381         }
 382
 383         return 0;
 384 }
 385
 386 void backend_destroy_one( BackendDB *bd, int dynamic )
 387 {
 388         if ( dynamic ) {
 389                 LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 390         }
 391
 392         if ( bd->be_syncinfo ) {
 393                 syncinfo_free( bd->be_syncinfo );
 394         }
 395
 396         if ( bd->be_pending_csn_list ) {
 397                 struct slap_csn_entry *csne;
 398                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 399                 while ( csne ) {
 400                         struct slap_csn_entry *tmp_csne = csne;
 401
 402                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 403                         ch_free( csne->ce_csn.bv_val );
 404                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 405                         ch_free( tmp_csne );
 406                 }
 407                 ch_free( bd->be_pending_csn_list );
 408         }
 409
 410         if ( bd->bd_info->bi_db_destroy ) {
 411                 bd->bd_info->bi_db_destroy( bd );
 412         }
 413         ber_bvarray_free( bd->be_suffix );
 414         ber_bvarray_free( bd->be_nsuffix );
 415         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 416                 free( bd->be_rootdn.bv_val );
 417         }
 418         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 419                 free( bd->be_rootndn.bv_val );
 420         }
 421         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 422                 free( bd->be_rootpw.bv_val );
 423         }
 424         acl_destroy( bd->be_acl, frontendDB->be_acl );
 425         limits_destroy( bd->be_limits );
 426         if ( bd->be_replogfile ) {
 427                 ch_free( bd->be_replogfile );
 428         }
 429         destroy_replica_info( bd );
 430         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 431                 ch_free( bd->be_update_ndn.bv_val );
 432         }
 433         if ( bd->be_update_refs ) {
 434                 ber_bvarray_free( bd->be_update_refs );
 435         }
 436
 437         if ( dynamic ) {
 438                 free( bd );
 439         }
 440 }
 441
 442 int backend_destroy(void)
 443 {
 444         BackendDB *bd;
 445         BackendInfo *bi;
 446
 447         /* destroy each backend database */
 448         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 449                 backend_destroy_one( bd, 1 );
 450         }
 451
 452         /* destroy each backend type */
 453         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 454                 if( bi->bi_destroy ) {
 455                         bi->bi_destroy( bi );
 456                 }
 457         }
 458
 459         nBackendInfo = 0;
 460         LDAP_STAILQ_INIT(&backendInfo);
 461
 462         /* destroy frontend database */
 463         bd = frontendDB;
 464         if ( bd ) {
 465                 if ( bd->bd_info->bi_db_destroy ) {
 466                         bd->bd_info->bi_db_destroy( bd );
 467                 }
 468                 ber_bvarray_free( bd->be_suffix );
 469                 ber_bvarray_free( bd->be_nsuffix );
 470                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 471                         free( bd->be_rootdn.bv_val );
 472                 }
 473                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 474                         free( bd->be_rootndn.bv_val );
 475                 }
 476                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 477                         free( bd->be_rootpw.bv_val );
 478                 }
 479                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 480
 481                 if ( bd->be_replogfile != NULL ) {
 482                         free( bd->be_replogfile );
 483                 }
 484                 assert( bd->be_replica == NULL );
 485         }
 486
 487         return 0;
 488 }
 489
 490 BackendInfo* backend_info(const char *type)
 491 {
 492         BackendInfo *bi;
 493
 494         /* search for the backend type */
 495         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 496                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 497                         return bi;
 498                 }
 499         }
 500
 501         return NULL;
 502 }
 503
 504
 505 BackendDB *
 506 backend_db_init(
 507     const char  *type,
 508         BackendDB *be )
 509 {
 510         BackendInfo *bi = backend_info(type);
 511         int     rc = 0;
 512
 513         if( bi == NULL ) {
 514                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 515                 return NULL;
 516         }
 517
 518         /* If be is provided, treat it as private. Otherwise allocate
 519          * one and add it to the global list.
 520          */
 521         if ( !be ) {
 522                 be = ch_calloc( 1, sizeof(Backend) );
 523                 nbackends++;
 524                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 525         }
 526
 527         be->bd_info = bi;
 528
 529         be->be_def_limit = frontendDB->be_def_limit;
 530         be->be_dfltaccess = frontendDB->be_dfltaccess;
 531
 532         be->be_restrictops = frontendDB->be_restrictops;
 533         be->be_requires = frontendDB->be_requires;
 534         be->be_ssf_set = frontendDB->be_ssf_set;
 535
 536         be->be_pcl_mutexp = &be->be_pcl_mutex;
 537         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 538
 539         /* assign a default depth limit for alias deref */
 540         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 541
 542         if ( bi->bi_db_init ) {
 543                 rc = bi->bi_db_init( be );
 544         }
 545
 546         if ( rc != 0 ) {
 547                 fprintf( stderr, "database init failed (%s)\n", type );
 548                 nbackends--;
 549                 return NULL;
 550         }
 551
 552         bi->bi_nDB++;
 553         return( be );
 554 }
 555
 556 void
 557 be_db_close( void )
 558 {
 559         BackendDB *be;
 560
 561         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 562                 if ( be->bd_info->bi_db_close ) {
 563                         be->bd_info->bi_db_close( be );
 564                 }
 565         }
 566
 567         if ( frontendDB->bd_info->bi_db_close ) {
 568                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 569         }
 570
 571 }
 572
 573 Backend *
 574 select_backend(
 575         struct berval * dn,
 576         int manageDSAit, /* unused since ITS#4986 */
 577         int noSubs )
 578 {
 579         int             j;
 580         ber_len_t       len, dnlen = dn->bv_len;
 581         Backend         *be;
 582
 583         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 584                 if ( be->be_nsuffix == NULL ) {
 585                         continue;
 586                 }
 587
 588                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 589                 {
 590                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 591                         {
 592                                 continue;
 593                         }
 594
 595                         len = be->be_nsuffix[j].bv_len;
 596
 597                         if ( len > dnlen ) {
 598                                 /* suffix is longer than DN */
 599                                 continue;
 600                         }
 601
 602                         /*
 603                          * input DN is normalized, so the separator check
 604                          * need not look at escaping
 605                          */
 606                         if ( len && len < dnlen &&
 607                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 608                         {
 609                                 continue;
 610                         }
 611
 612                         if ( strcmp( be->be_nsuffix[j].bv_val,
 613                                 &dn->bv_val[dnlen-len] ) == 0 )
 614                         {
 615                                 return be;
 616                         }
 617                 }
 618         }
 619
 620         return be;
 621 }
 622
 623 int
 624 be_issuffix(
 625     Backend *be,
 626     struct berval *bvsuffix )
 627 {
 628         int     i;
 629
 630         if ( be->be_nsuffix == NULL ) {
 631                 return 0;
 632         }
 633
 634         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 635                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 636                         return 1;
 637                 }
 638         }
 639
 640         return 0;
 641 }
 642
 643 int
 644 be_isroot_dn( Backend *be, struct berval *ndn )
 645 {
 646         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 647                 return 0;
 648         }
 649
 650         return dn_match( &be->be_rootndn, ndn );
 651 }
 652
 653 int
 654 be_slurp_update( Operation *op )
 655 {
 656         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 657                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 658 }
 659
 660 int
 661 be_shadow_update( Operation *op )
 662 {
 663         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 664                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 665 }
 666
 667 int
 668 be_isupdate_dn( Backend *be, struct berval *ndn )
 669 {
 670         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 671                 return 0;
 672         }
 673
 674         return dn_match( &be->be_update_ndn, ndn );
 675 }
 676
 677 struct berval *
 678 be_root_dn( Backend *be )
 679 {
 680         return &be->be_rootdn;
 681 }
 682
 683 int
 684 be_isroot( Operation *op )
 685 {
 686         return be_isroot_dn( op->o_bd, &op->o_ndn );
 687 }
 688
 689 int
 690 be_isroot_pw( Operation *op )
 691 {
 692         int result;
 693
 694         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 695                 return 0;
 696         }
 697
 698         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 699                 return 0;
 700         }
 701
 702 #ifdef SLAPD_SPASSWD
 703         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 704                 op->o_conn->c_sasl_authctx, NULL );
 705 #endif
 706
 707         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 708
 709 #ifdef SLAPD_SPASSWD
 710         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 711 #endif
 712
 713         return result == 0;
 714 }
 715
 716 int
 717 be_entry_release_rw(
 718         Operation *op,
 719         Entry *e,
 720         int rw )
 721 {
 722         if ( op->o_bd->be_release ) {
 723                 /* free and release entry from backend */
 724                 return op->o_bd->be_release( op, e, rw );
 725         } else {
 726                 /* free entry */
 727                 entry_free( e );
 728                 return 0;
 729         }
 730 }
 731
 732 int
 733 backend_unbind( Operation *op, SlapReply *rs )
 734 {
 735         BackendDB *be;
 736
 737         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 738                 if ( be->be_unbind ) {
 739                         op->o_bd = be;
 740                         be->be_unbind( op, rs );
 741                 }
 742         }
 743
 744         return 0;
 745 }
 746
 747 int
 748 backend_connection_init(
 749         Connection   *conn )
 750 {
 751         BackendDB *be;
 752
 753         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 754                 if ( be->be_connection_init ) {
 755                         be->be_connection_init( be, conn );
 756                 }
 757         }
 758
 759         return 0;
 760 }
 761
 762 int
 763 backend_connection_destroy(
 764         Connection   *conn )
 765 {
 766         BackendDB *be;
 767
 768         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 769                 if ( be->be_connection_destroy ) {
 770                         be->be_connection_destroy( be, conn);
 771                 }
 772         }
 773
 774         return 0;
 775 }
 776
 777 int
 778 backend_check_controls(
 779         Operation *op,
 780         SlapReply *rs )
 781 {
 782         LDAPControl **ctrls = op->o_ctrls;
 783         rs->sr_err = LDAP_SUCCESS;
 784
 785         if( ctrls ) {
 786                 for( ; *ctrls != NULL ; ctrls++ ) {
 787                         int cid;
 788
 789                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 790                         case LDAP_CONTROL_NOT_FOUND:
 791                                 /* unrecognized control */
 792                                 if ( (*ctrls)->ldctl_iscritical ) {
 793                                         /* should not be reachable */
 794                                         Debug( LDAP_DEBUG_ANY,
 795                                                 "backend_check_controls: unrecognized control: %s\n",
 796                                                 (*ctrls)->ldctl_oid, 0, 0 );
 797                                         assert( 0 );
 798                                 }
 799                                 break;
 800
 801                         case LDAP_COMPARE_FALSE:
 802                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 803                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 804                                          * is recognized and appropriate for the operation (which
 805                                          * we've already verified), then the server should make
 806                                          * use of the control when performing the operation.
 807                                          *
 808                                          * Here we find that operation extended by the control
 809                                          * is unavailable in a particular context, and the control
 810                                          * is marked Critical, hence the return of
 811                                          * unwillingToPerform.
 812                                          */
 813                                         rs->sr_text = "critical control unavailable in context";
 814                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 815                                         goto done;
 816                                 }
 817                                 break;
 818
 819                         case LDAP_COMPARE_TRUE:
 820                                 break;
 821
 822                         default:
 823                                 /* unreachable */
 824                                 Debug( LDAP_DEBUG_ANY,
 825                                         "backend_check_controls: unable to check control: %s\n",
 826                                         (*ctrls)->ldctl_oid, 0, 0 );
 827                                 assert( 0 );
 828
 829                                 rs->sr_text = "unable to check control";
 830                                 rs->sr_err = LDAP_OTHER;
 831                                 goto done;
 832                         }
 833                 }
 834         }
 835
 836         /* temporarily removed */
 837 #if 0
 838         /* check should be generalized */
 839         if( get_manageDIT(op) && !be_isroot(op)) {
 840                 rs->sr_text = "requires manager authorization";
 841                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 842         }
 843 #endif
 844
 845 done:;
 846         return rs->sr_err;
 847 }
 848
 849 int
 850 backend_check_restrictions(
 851         Operation *op,
 852         SlapReply *rs,
 853         struct berval *opdata )
 854 {
 855         slap_mask_t restrictops;
 856         slap_mask_t requires;
 857         slap_mask_t opflag;
 858         slap_mask_t exopflag = 0;
 859         slap_ssf_set_t *ssf;
 860         int updateop = 0;
 861         int starttls = 0;
 862         int session = 0;
 863
 864         if ( op->o_bd ) {
 865                 int     rc = SLAP_CB_CONTINUE;
 866
 867                 if ( op->o_bd->be_chk_controls ) {
 868                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 869                 }
 870
 871                 if ( rc == SLAP_CB_CONTINUE ) {
 872                         rc = backend_check_controls( op, rs );
 873                 }
 874
 875                 if ( rc != LDAP_SUCCESS ) {
 876                         return rs->sr_err;
 877                 }
 878
 879                 restrictops = op->o_bd->be_restrictops;
 880                 requires = op->o_bd->be_requires;
 881                 ssf = &op->o_bd->be_ssf_set;
 882
 883         } else {
 884                 restrictops = frontendDB->be_restrictops;
 885                 requires = frontendDB->be_requires;
 886                 ssf = &frontendDB->be_ssf_set;
 887         }
 888
 889         switch( op->o_tag ) {
 890         case LDAP_REQ_ADD:
 891                 opflag = SLAP_RESTRICT_OP_ADD;
 892                 updateop++;
 893                 break;
 894         case LDAP_REQ_BIND:
 895                 opflag = SLAP_RESTRICT_OP_BIND;
 896                 session++;
 897                 break;
 898         case LDAP_REQ_COMPARE:
 899                 opflag = SLAP_RESTRICT_OP_COMPARE;
 900                 break;
 901         case LDAP_REQ_DELETE:
 902                 updateop++;
 903                 opflag = SLAP_RESTRICT_OP_DELETE;
 904                 break;
 905         case LDAP_REQ_EXTENDED:
 906                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 907
 908                 if( !opdata ) {
 909                         /* treat unspecified as a modify */
 910                         opflag = SLAP_RESTRICT_OP_MODIFY;
 911                         updateop++;
 912                         break;
 913                 }
 914
 915                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 916                         session++;
 917                         starttls++;
 918                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 919                         break;
 920                 }
 921
 922                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 923                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 924                         break;
 925                 }
 926
 927                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 928                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 929                         break;
 930                 }
 931
 932                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 933                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 934                         updateop++;
 935                         break;
 936                 }
 937
 938                 /* treat everything else as a modify */
 939                 opflag = SLAP_RESTRICT_OP_MODIFY;
 940                 updateop++;
 941                 break;
 942
 943         case LDAP_REQ_MODIFY:
 944                 updateop++;
 945                 opflag = SLAP_RESTRICT_OP_MODIFY;
 946                 break;
 947         case LDAP_REQ_RENAME:
 948                 updateop++;
 949                 opflag = SLAP_RESTRICT_OP_RENAME;
 950                 break;
 951         case LDAP_REQ_SEARCH:
 952                 opflag = SLAP_RESTRICT_OP_SEARCH;
 953                 break;
 954         case LDAP_REQ_UNBIND:
 955                 session++;
 956                 opflag = 0;
 957                 break;
 958         default:
 959                 rs->sr_text = "restrict operations internal error";
 960                 rs->sr_err = LDAP_OTHER;
 961                 return rs->sr_err;
 962         }
 963
 964         if ( !starttls ) {
 965                 /* these checks don't apply to StartTLS */
 966
 967                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 968                 if( op->o_transport_ssf < ssf->sss_transport ) {
 969                         rs->sr_text = op->o_transport_ssf
 970                                 ? "stronger transport confidentiality required"
 971                                 : "transport confidentiality required";
 972                         return rs->sr_err;
 973                 }
 974
 975                 if( op->o_tls_ssf < ssf->sss_tls ) {
 976                         rs->sr_text = op->o_tls_ssf
 977                                 ? "stronger TLS confidentiality required"
 978                                 : "TLS confidentiality required";
 979                         return rs->sr_err;
 980                 }
 981
 982
 983                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 984                         /* simple bind specific check */
 985                         if( op->o_ssf < ssf->sss_simple_bind ) {
 986                                 rs->sr_text = op->o_ssf
 987                                         ? "stronger confidentiality required"
 988                                         : "confidentiality required";
 989                                 return rs->sr_err;
 990                         }
 991                 }
 992
 993                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 994                         /* these checks don't apply to SASL bind */
 995
 996                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 997                                 rs->sr_text = op->o_sasl_ssf
 998                                         ? "stronger SASL confidentiality required"
 999                                         : "SASL confidentiality required";
1000                                 return rs->sr_err;
1001                         }
1002
1003                         if( op->o_ssf < ssf->sss_ssf ) {
1004                                 rs->sr_text = op->o_ssf
1005                                         ? "stronger confidentiality required"
1006                                         : "confidentiality required";
1007                                 return rs->sr_err;
1008                         }
1009                 }
1010
1011                 if( updateop ) {
1012                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1013                                 rs->sr_text = op->o_transport_ssf
1014                                         ? "stronger transport confidentiality required for update"
1015                                         : "transport confidentiality required for update";
1016                                 return rs->sr_err;
1017                         }
1018
1019                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1020                                 rs->sr_text = op->o_tls_ssf
1021                                         ? "stronger TLS confidentiality required for update"
1022                                         : "TLS confidentiality required for update";
1023                                 return rs->sr_err;
1024                         }
1025
1026                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1027                                 rs->sr_text = op->o_sasl_ssf
1028                                         ? "stronger SASL confidentiality required for update"
1029                                         : "SASL confidentiality required for update";
1030                                 return rs->sr_err;
1031                         }
1032
1033                         if( op->o_ssf < ssf->sss_update_ssf ) {
1034                                 rs->sr_text = op->o_ssf
1035                                         ? "stronger confidentiality required for update"
1036                                         : "confidentiality required for update";
1037                                 return rs->sr_err;
1038                         }
1039
1040                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1041                                 BER_BVISEMPTY( &op->o_ndn ) )
1042                         {
1043                                 rs->sr_text = "modifications require authentication";
1044                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1045                                 return rs->sr_err;
1046                         }
1047
1048 #ifdef SLAP_X_LISTENER_MOD
1049                         if ( op->o_conn->c_listener &&
1050                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1051                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1052                         {
1053                                 /* no "w" mode means readonly */
1054                                 rs->sr_text = "modifications not allowed on this listener";
1055                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1056                                 return rs->sr_err;
1057                         }
1058 #endif /* SLAP_X_LISTENER_MOD */
1059                 }
1060         }
1061
1062         if ( !session ) {
1063                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1064
1065                 if( requires & SLAP_REQUIRE_STRONG ) {
1066                         /* should check mechanism */
1067                         if( ( op->o_transport_ssf < ssf->sss_transport
1068                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1069                                 || BER_BVISEMPTY( &op->o_dn ) )
1070                         {
1071                                 rs->sr_text = "strong(er) authentication required";
1072                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1073                                 return rs->sr_err;
1074                         }
1075                 }
1076
1077                 if( requires & SLAP_REQUIRE_SASL ) {
1078                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1079                                 rs->sr_text = "SASL authentication required";
1080                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1081                                 return rs->sr_err;
1082                         }
1083                 }
1084
1085                 if( requires & SLAP_REQUIRE_AUTHC ) {
1086                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1087                                 rs->sr_text = "authentication required";
1088                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1089                                 return rs->sr_err;
1090                         }
1091                 }
1092
1093                 if( requires & SLAP_REQUIRE_BIND ) {
1094                         int version;
1095                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1096                         version = op->o_conn->c_protocol;
1097                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1098
1099                         if( !version ) {
1100                                 /* no bind has occurred */
1101                                 rs->sr_text = "BIND required";
1102                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1103                                 return rs->sr_err;
1104                         }
1105                 }
1106
1107                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1108                         if( op->o_protocol < LDAP_VERSION3 ) {
1109                                 /* no bind has occurred */
1110                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1111                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1112                                 return rs->sr_err;
1113                         }
1114                 }
1115
1116 #ifdef SLAP_X_LISTENER_MOD
1117                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1118                         if ( op->o_conn->c_listener &&
1119                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1120                 {
1121                                 /* no "x" mode means bind required */
1122                                 rs->sr_text = "bind required on this listener";
1123                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1124                                 return rs->sr_err;
1125                         }
1126                 }
1127
1128                 if ( !starttls && !updateop ) {
1129                         if ( op->o_conn->c_listener &&
1130                                 !( op->o_conn->c_listener->sl_perms &
1131                                         ( !BER_BVISEMPTY( &op->o_dn )
1132                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1133                         {
1134                                 /* no "r" mode means no read */
1135                                 rs->sr_text = "read not allowed on this listener";
1136                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1137                                 return rs->sr_err;
1138                         }
1139                 }
1140 #endif /* SLAP_X_LISTENER_MOD */
1141
1142         }
1143
1144         if( ( restrictops & opflag )
1145                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1146                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1147                         rs->sr_text = "read operations restricted";
1148                 } else if ( restrictops & exopflag ) {
1149                         rs->sr_text = "extended operation restricted";
1150                 } else {
1151                         rs->sr_text = "operation restricted";
1152                 }
1153                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1154                 return rs->sr_err;
1155         }
1156
1157         rs->sr_err = LDAP_SUCCESS;
1158         return rs->sr_err;
1159 }
1160
1161 int backend_check_referrals( Operation *op, SlapReply *rs )
1162 {
1163         rs->sr_err = LDAP_SUCCESS;
1164
1165         if( op->o_bd->be_chk_referrals ) {
1166                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1167
1168                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1169                         send_ldap_result( op, rs );
1170                 }
1171         }
1172
1173         return rs->sr_err;
1174 }
1175
1176 int
1177 be_entry_get_rw(
1178         Operation *op,
1179         struct berval *ndn,
1180         ObjectClass *oc,
1181         AttributeDescription *at,
1182         int rw,
1183         Entry **e )
1184 {
1185         *e = NULL;
1186
1187         if ( op->o_bd == NULL ) {
1188                 return LDAP_NO_SUCH_OBJECT;
1189         }
1190
1191         if ( op->o_bd->be_fetch ) {
1192                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1193         }
1194
1195         return LDAP_UNWILLING_TO_PERFORM;
1196 }
1197
1198 int
1199 fe_acl_group(
1200         Operation *op,
1201         Entry   *target,
1202         struct berval *gr_ndn,
1203         struct berval *op_ndn,
1204         ObjectClass *group_oc,
1205         AttributeDescription *group_at )
1206 {
1207         Entry *e;
1208         void *o_priv = op->o_private, *e_priv = NULL;
1209         Attribute *a;
1210         int rc;
1211         GroupAssertion *g;
1212         Backend *be = op->o_bd;
1213
1214         op->o_bd = select_backend( gr_ndn, 0, 0 );
1215
1216         for ( g = op->o_groups; g; g = g->ga_next ) {
1217                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1218                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1219                 {
1220                         continue;
1221                 }
1222                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1223                         break;
1224                 }
1225         }
1226
1227         if ( g ) {
1228                 rc = g->ga_res;
1229                 goto done;
1230         }
1231
1232         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1233                 e = target;
1234                 rc = 0;
1235         } else {
1236                 op->o_private = NULL;
1237                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1238                 e_priv = op->o_private;
1239                 op->o_private = o_priv;
1240         }
1241         if ( e ) {
1242                 a = attr_find( e->e_attrs, group_at );
1243                 if ( a ) {
1244                         /* If the attribute is a subtype of labeledURI, treat this as
1245                          * a dynamic group ala groupOfURLs
1246                          */
1247                         if (is_at_subtype( group_at->ad_type,
1248                                 slap_schema.si_ad_labeledURI->ad_type ) )
1249                         {
1250                                 int i;
1251                                 LDAPURLDesc *ludp;
1252                                 struct berval bv, nbase;
1253                                 Filter *filter;
1254                                 Entry *user;
1255                                 void *user_priv = NULL;
1256                                 Backend *b2 = op->o_bd;
1257
1258                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1259                                         user = target;
1260                                 } else {
1261                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1262                                         op->o_private = NULL;
1263                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1264                                         user_priv = op->o_private;
1265                                         op->o_private = o_priv;
1266                                 }
1267
1268                                 if ( rc == 0 ) {
1269                                         rc = LDAP_COMPARE_FALSE;
1270                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1271                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1272                                                         LDAP_URL_SUCCESS )
1273                                                 {
1274                                                         continue;
1275                                                 }
1276                                                 BER_BVZERO( &nbase );
1277                                                 /* host part must be empty */
1278                                                 /* attrs and extensions parts must be empty */
1279                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1280                                                         ludp->lud_attrs || ludp->lud_exts )
1281                                                 {
1282                                                         goto loopit;
1283                                                 }
1284                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1285                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1286                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1287                                                 {
1288                                                         goto loopit;
1289                                                 }
1290                                                 switch ( ludp->lud_scope ) {
1291                                                 case LDAP_SCOPE_BASE:
1292                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1293                                                                 goto loopit;
1294                                                         }
1295                                                         break;
1296                                                 case LDAP_SCOPE_ONELEVEL:
1297                                                         dnParent( op_ndn, &bv );
1298                                                         if ( !dn_match( &nbase, &bv ) ) {
1299                                                                 goto loopit;
1300                                                         }
1301                                                         break;
1302                                                 case LDAP_SCOPE_SUBTREE:
1303                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1304                                                                 goto loopit;
1305                                                         }
1306                                                         break;
1307                                                 case LDAP_SCOPE_SUBORDINATE:
1308                                                         if ( dn_match( &nbase, op_ndn ) ||
1309                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1310                                                         {
1311                                                                 goto loopit;
1312                                                         }
1313                                                 }
1314                                                 filter = str2filter_x( op, ludp->lud_filter );
1315                                                 if ( filter ) {
1316                                                         if ( test_filter( NULL, user, filter ) ==
1317                                                                 LDAP_COMPARE_TRUE )
1318                                                         {
1319                                                                 rc = 0;
1320                                                         }
1321                                                         filter_free_x( op, filter );
1322                                                 }
1323 loopit:
1324                                                 ldap_free_urldesc( ludp );
1325                                                 if ( !BER_BVISNULL( &nbase ) ) {
1326                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1327                                                 }
1328                                                 if ( rc == 0 ) break;
1329                                         }
1330                                         if ( user != target ) {
1331                                                 op->o_private = user_priv;
1332                                                 be_entry_release_r( op, user );
1333                                                 op->o_private = o_priv;
1334                                         }
1335                                 }
1336                                 op->o_bd = b2;
1337                         } else {
1338                                 rc = value_find_ex( group_at,
1339                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1340                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1341                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1342                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1343                                         rc = LDAP_COMPARE_FALSE;
1344                         }
1345                 } else {
1346                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1347                 }
1348                 if ( e != target ) {
1349                         op->o_private = e_priv;
1350                         be_entry_release_r( op, e );
1351                         op->o_private = o_priv;
1352                 }
1353         } else {
1354                 rc = LDAP_NO_SUCH_OBJECT;
1355         }
1356
1357         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1358                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1359                         op->o_tmpmemctx );
1360                 g->ga_be = op->o_bd;
1361                 g->ga_oc = group_oc;
1362                 g->ga_at = group_at;
1363                 g->ga_res = rc;
1364                 g->ga_len = gr_ndn->bv_len;
1365                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1366                 g->ga_next = op->o_groups;
1367                 op->o_groups = g;
1368         }
1369 done:
1370         op->o_bd = be;
1371         return rc;
1372 }
1373
1374 int
1375 backend_group(
1376         Operation *op,
1377         Entry   *target,
1378         struct berval *gr_ndn,
1379         struct berval *op_ndn,
1380         ObjectClass *group_oc,
1381         AttributeDescription *group_at )
1382 {
1383         int                     rc;
1384         BackendDB               *be_orig;
1385
1386         if ( op->o_abandon ) {
1387                 return SLAPD_ABANDON;
1388         }
1389
1390         be_orig = op->o_bd;
1391         op->o_bd = frontendDB;
1392 #ifdef SLAP_OVERLAY_ACCESS
1393         rc = frontendDB->be_group( op, target, gr_ndn,
1394                 op_ndn, group_oc, group_at );
1395 #else /* ! SLAP_OVERLAY_ACCESS */
1396         rc = fe_acl_group( op, target, gr_ndn,
1397                 op_ndn, group_oc, group_at );
1398 #endif /* ! SLAP_OVERLAY_ACCESS */
1399         op->o_bd = be_orig;
1400
1401         return rc;
1402 }
1403
1404 int
1405 fe_acl_attribute(
1406         Operation *op,
1407         Entry   *target,
1408         struct berval   *edn,
1409         AttributeDescription *entry_at,
1410         BerVarray *vals,
1411         slap_access_t access )
1412 {
1413         Entry                   *e = NULL;
1414         void                    *o_priv = op->o_private, *e_priv = NULL;
1415         Attribute               *a = NULL;
1416         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1417         AccessControlState      acl_state = ACL_STATE_INIT;
1418         Backend                 *be = op->o_bd;
1419
1420         op->o_bd = select_backend( edn, 0, 0 );
1421
1422         if ( target && dn_match( &target->e_nname, edn ) ) {
1423                 e = target;
1424
1425         } else {
1426                 op->o_private = NULL;
1427                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1428                 e_priv = op->o_private;
1429                 op->o_private = o_priv;
1430         }
1431
1432         if ( e ) {
1433                 a = attr_find( e->e_attrs, entry_at );
1434                 if ( a == NULL ) {
1435                         SlapReply       rs = { 0 };
1436                         AttributeName   anlist[ 2 ];
1437
1438                         anlist[ 0 ].an_name = entry_at->ad_cname;
1439                         anlist[ 0 ].an_desc = entry_at;
1440                         BER_BVZERO( &anlist[ 1 ].an_name );
1441                         rs.sr_attrs = anlist;
1442
1443                         /* NOTE: backend_operational() is also called
1444                          * when returning results, so it's supposed
1445                          * to do no harm to entries */
1446                         rs.sr_entry = e;
1447                         rc = backend_operational( op, &rs );
1448                         rs.sr_entry = NULL;
1449
1450                         if ( rc == LDAP_SUCCESS ) {
1451                                 if ( rs.sr_operational_attrs ) {
1452                                         freeattr = 1;
1453                                         a = rs.sr_operational_attrs;
1454
1455                                 } else {
1456                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1457                                 }
1458                         }
1459                 }
1460
1461                 if ( a ) {
1462                         BerVarray v;
1463
1464                         if ( op->o_conn && access > ACL_NONE &&
1465                                 access_allowed( op, e, entry_at, NULL,
1466                                                 access, &acl_state ) == 0 )
1467                         {
1468                                 rc = LDAP_INSUFFICIENT_ACCESS;
1469                                 goto freeit;
1470                         }
1471
1472                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1473                                 ;
1474
1475                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1476                                 op->o_tmpmemctx );
1477                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1478                         {
1479                                 if ( op->o_conn && access > ACL_NONE &&
1480                                         access_allowed( op, e, entry_at,
1481                                                         &a->a_nvals[i],
1482                                                         access,
1483                                                         &acl_state ) == 0 )
1484                                 {
1485                                         continue;
1486                                 }
1487                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1488                                                 op->o_tmpmemctx );
1489                                 if ( !BER_BVISNULL( &v[j] ) ) {
1490                                         j++;
1491                                 }
1492                         }
1493                         if ( j == 0 ) {
1494                                 op->o_tmpfree( v, op->o_tmpmemctx );
1495                                 *vals = NULL;
1496                                 rc = LDAP_INSUFFICIENT_ACCESS;
1497
1498                         } else {
1499                                 BER_BVZERO( &v[j] );
1500                                 *vals = v;
1501                                 rc = LDAP_SUCCESS;
1502                         }
1503                 }
1504 freeit:         if ( e != target ) {
1505                         op->o_private = e_priv;
1506                         be_entry_release_r( op, e );
1507                         op->o_private = o_priv;
1508                 }
1509                 if ( freeattr ) {
1510                         attr_free( a );
1511                 }
1512         }
1513
1514         op->o_bd = be;
1515         return rc;
1516 }
1517
1518 int
1519 backend_attribute(
1520         Operation *op,
1521         Entry   *target,
1522         struct berval   *edn,
1523         AttributeDescription *entry_at,
1524         BerVarray *vals,
1525         slap_access_t access )
1526 {
1527         int                     rc;
1528         BackendDB               *be_orig;
1529
1530         be_orig = op->o_bd;
1531         op->o_bd = frontendDB;
1532 #ifdef SLAP_OVERLAY_ACCESS
1533         rc = frontendDB->be_attribute( op, target, edn,
1534                 entry_at, vals, access );
1535 #else /* !SLAP_OVERLAY_ACCESS */
1536         rc = fe_acl_attribute( op, target, edn,
1537                 entry_at, vals, access );
1538 #endif /* !SLAP_OVERLAY_ACCESS */
1539         op->o_bd = be_orig;
1540
1541         return rc;
1542 }
1543
1544 int
1545 backend_access(
1546         Operation               *op,
1547         Entry                   *target,
1548         struct berval           *edn,
1549         AttributeDescription    *entry_at,
1550         struct berval           *nval,
1551         slap_access_t           access,
1552         slap_mask_t             *mask )
1553 {
1554         Entry           *e = NULL;
1555         void            *o_priv = op->o_private, *e_priv = NULL;
1556         int             rc = LDAP_INSUFFICIENT_ACCESS;
1557         Backend         *be = op->o_bd;
1558
1559         /* pedantic */
1560         assert( op != NULL );
1561         assert( op->o_conn != NULL );
1562         assert( edn != NULL );
1563         assert( access > ACL_NONE );
1564
1565         op->o_bd = select_backend( edn, 0, 0 );
1566
1567         if ( target && dn_match( &target->e_nname, edn ) ) {
1568                 e = target;
1569
1570         } else {
1571                 op->o_private = NULL;
1572                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1573                 e_priv = op->o_private;
1574                 op->o_private = o_priv;
1575         }
1576
1577         if ( e ) {
1578                 Attribute       *a = NULL;
1579                 int             freeattr = 0;
1580
1581                 if ( entry_at == NULL ) {
1582                         entry_at = slap_schema.si_ad_entry;
1583                 }
1584
1585                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1586                 {
1587                         if ( access_allowed_mask( op, e, entry_at,
1588                                         NULL, access, NULL, mask ) == 0 )
1589                         {
1590                                 rc = LDAP_INSUFFICIENT_ACCESS;
1591
1592                         } else {
1593                                 rc = LDAP_SUCCESS;
1594                         }
1595
1596                 } else {
1597                         a = attr_find( e->e_attrs, entry_at );
1598                         if ( a == NULL ) {
1599                                 SlapReply       rs = { 0 };
1600                                 AttributeName   anlist[ 2 ];
1601
1602                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1603                                 anlist[ 0 ].an_desc = entry_at;
1604                                 BER_BVZERO( &anlist[ 1 ].an_name );
1605                                 rs.sr_attrs = anlist;
1606
1607                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1608
1609                                 /* NOTE: backend_operational() is also called
1610                                  * when returning results, so it's supposed
1611                                  * to do no harm to entries */
1612                                 rs.sr_entry = e;
1613                                 rc = backend_operational( op, &rs );
1614                                 rs.sr_entry = NULL;
1615
1616                                 if ( rc == LDAP_SUCCESS ) {
1617                                         if ( rs.sr_operational_attrs ) {
1618                                                 freeattr = 1;
1619                                                 a = rs.sr_operational_attrs;
1620
1621                                         } else {
1622                                                 rc = LDAP_NO_SUCH_OBJECT;
1623                                         }
1624                                 }
1625                         }
1626
1627                         if ( a ) {
1628                                 if ( access_allowed_mask( op, e, entry_at,
1629                                                 nval, access, NULL, mask ) == 0 )
1630                                 {
1631                                         rc = LDAP_INSUFFICIENT_ACCESS;
1632                                         goto freeit;
1633                                 }
1634                                 rc = LDAP_SUCCESS;
1635                         }
1636                 }
1637 freeit:         if ( e != target ) {
1638                         op->o_private = e_priv;
1639                         be_entry_release_r( op, e );
1640                         op->o_private = o_priv;
1641                 }
1642                 if ( freeattr ) {
1643                         attr_free( a );
1644                 }
1645         }
1646
1647         op->o_bd = be;
1648         return rc;
1649 }
1650
1651 int
1652 fe_aux_operational(
1653         Operation *op,
1654         SlapReply *rs )
1655 {
1656         Attribute               **ap;
1657         int                     rc = 0;
1658         BackendDB               *be_orig;
1659
1660         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1661                 /* just count them */ ;
1662
1663         /*
1664          * If operational attributes (allegedly) are required,
1665          * and the backend supports specific operational attributes,
1666          * add them to the attribute list
1667          */
1668         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1669                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1670                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1671         {
1672                 *ap = slap_operational_entryDN( rs->sr_entry );
1673                 ap = &(*ap)->a_next;
1674         }
1675
1676         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1677                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1678                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1679         {
1680                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1681                 ap = &(*ap)->a_next;
1682         }
1683
1684         if ( op->o_bd != NULL )
1685         {
1686                 /* Let the overlays have a chance at this */
1687                 be_orig = op->o_bd;
1688                 op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
1689                 if ( !be_match( op->o_bd, frontendDB ) &&
1690                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1691                         op->o_bd != NULL && op->o_bd->be_operational != NULL )
1692                 {
1693                         rc = op->o_bd->be_operational( op, rs );
1694                 }
1695                 op->o_bd = be_orig;
1696         }
1697
1698         return rc;
1699 }
1700
1701 int backend_operational( Operation *op, SlapReply *rs )
1702 {
1703         int rc;
1704         BackendDB *be_orig;
1705
1706         /* Moved this into the frontend so global overlays are called */
1707
1708         be_orig = op->o_bd;
1709         op->o_bd = frontendDB;
1710         rc = frontendDB->be_operational( op, rs );
1711         op->o_bd = be_orig;
1712
1713         return rc;
1714 }
1715