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 1998-2006 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 /*
  41  * If a module is configured as dynamic, its header should not
  42  * get included into slapd. While this is a general rule and does
  43  * not have much of an effect in UNIX, this rule should be adhered
  44  * to for Windows, where dynamic object code should not be implicitly
  45  * imported into slapd without appropriate __declspec(dllimport) directives.
  46  */
  47
  48 int                     nBackendInfo = 0;
  49 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  50
  51 int                     nBackendDB = 0;
  52 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  53
  54 static int
  55 backend_init_controls( BackendInfo *bi )
  56 {
  57         if ( bi->bi_controls ) {
  58                 int     i;
  59
  60                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  61                         int     cid;
  62
  63                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  64                                         == LDAP_CONTROL_NOT_FOUND )
  65                         {
  66                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  67                                         assert( 0 );
  68                                 }
  69
  70                                 return -1;
  71                         }
  72
  73                         bi->bi_ctrls[ cid ] = 1;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 int backend_init(void)
  81 {
  82         int rc = -1;
  83         BackendInfo *bi;
  84
  85         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  86                 /* already initialized */
  87                 Debug( LDAP_DEBUG_ANY,
  88                         "backend_init: already initialized\n", 0, 0, 0 );
  89                 return -1;
  90         }
  91
  92         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  93                 assert( bi->bi_init != 0 );
  94
  95                 rc = bi->bi_init( bi );
  96
  97                 if(rc != 0) {
  98                         Debug( LDAP_DEBUG_ANY,
  99                                 "backend_init: initialized for type \"%s\"\n",
 100                                 bi->bi_type, 0, 0 );
 101                         /* destroy those we've already inited */
 102                         for( nBackendInfo--;
 103                                 nBackendInfo >= 0 ;
 104                                 nBackendInfo-- )
 105                         {
 106                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 107                                         slap_binfo[nBackendInfo].bi_destroy(
 108                                                 &slap_binfo[nBackendInfo] );
 109                                 }
 110                         }
 111                         return rc;
 112                 }
 113
 114                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 115         }
 116
 117         if ( nBackendInfo > 0) {
 118                 return 0;
 119         }
 120
 121 #ifdef SLAPD_MODULES
 122         return 0;
 123 #else
 124
 125         Debug( LDAP_DEBUG_ANY,
 126                 "backend_init: failed\n",
 127                 0, 0, 0 );
 128
 129         return rc;
 130 #endif /* SLAPD_MODULES */
 131 }
 132
 133 int backend_add(BackendInfo *aBackendInfo)
 134 {
 135         int rc = 0;
 136
 137         if ( aBackendInfo->bi_init == NULL ) {
 138                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 139                         "backend type \"%s\" does not have the (mandatory)init function\n",
 140                         aBackendInfo->bi_type, 0, 0 );
 141                 return -1;
 142         }
 143
 144         rc = aBackendInfo->bi_init(aBackendInfo);
 145         if ( rc != 0) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_add:  initialization for type \"%s\" failed\n",
 148                         aBackendInfo->bi_type, 0, 0 );
 149                 return rc;
 150         }
 151
 152         (void)backend_init_controls( aBackendInfo );
 153
 154         /* now add the backend type to the Backend Info List */
 155         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 156         nBackendInfo++;
 157         return 0;
 158 }
 159
 160 static int
 161 backend_set_controls( BackendDB *be )
 162 {
 163         BackendInfo     *bi = be->bd_info;
 164
 165         /* back-relay takes care of itself; so may do other */
 166         if ( overlay_is_over( be ) ) {
 167                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 168         }
 169
 170         if ( bi->bi_controls ) {
 171                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 172                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 173                                         sizeof( be->be_ctrls ) );
 174                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 175
 176                 } else {
 177                         int     i;
 178
 179                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 180                                 if ( bi->bi_ctrls[ i ] ) {
 181                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 182                                 }
 183                         }
 184                 }
 185
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* startup a specific backend database */
 192 int backend_startup_one(Backend *be)
 193 {
 194         int             rc = 0;
 195
 196         assert( be != NULL );
 197
 198         be->be_pending_csn_list = (struct be_pcl *)
 199                 ch_calloc( 1, sizeof( struct be_pcl ) );
 200
 201         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 202
 203         Debug( LDAP_DEBUG_TRACE,
 204                 "backend_startup_one: starting \"%s\"\n",
 205                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 206                 0, 0 );
 207
 208         /* set database controls */
 209         (void)backend_set_controls( be );
 210
 211         if ( be->bd_info->bi_db_open ) {
 212                 rc = be->bd_info->bi_db_open( be );
 213                 if ( rc == 0 ) {
 214                         (void)backend_set_controls( be );
 215
 216                 } else {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 219                                 rc, 0, 0 );
 220                 }
 221         }
 222
 223         return rc;
 224 }
 225
 226 int backend_startup(Backend *be)
 227 {
 228         int i;
 229         int rc = 0;
 230         BackendInfo *bi;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "backend_startup: %d databases to startup.\n",
 236                         nBackendDB, 0, 0 );
 237                 return 1;
 238         }
 239
 240         if(be != NULL) {
 241                 if ( be->bd_info->bi_open ) {
 242                         rc = be->bd_info->bi_open( be->bd_info );
 243                         if ( rc != 0 ) {
 244                                 Debug( LDAP_DEBUG_ANY,
 245                                         "backend_startup: bi_open failed!\n",
 246                                         0, 0, 0 );
 247
 248                                 return rc;
 249                         }
 250                 }
 251                 /* append global access controls */
 252                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 253
 254                 return backend_startup_one( be );
 255         }
 256
 257         /* open frontend, if required */
 258         if ( frontendDB->bd_info->bi_db_open ) {
 259                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 260                 if ( rc != 0 ) {
 261                         Debug( LDAP_DEBUG_ANY,
 262                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 263                                 rc, 0, 0 );
 264                         return rc;
 265                 }
 266         }
 267
 268         /* open each backend type */
 269         i = -1;
 270         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 271                 i++;
 272                 if( bi->bi_nDB == 0) {
 273                         /* no database of this type, don't open */
 274                         continue;
 275                 }
 276
 277                 if( bi->bi_open ) {
 278                         rc = bi->bi_open( bi );
 279                         if ( rc != 0 ) {
 280                                 Debug( LDAP_DEBUG_ANY,
 281                                         "backend_startup: bi_open %d (%s) failed!\n",
 282                                         i, bi->bi_type, 0 );
 283                                 return rc;
 284                         }
 285                 }
 286
 287                 (void)backend_init_controls( bi );
 288         }
 289
 290         /* open each backend database */
 291         i = -1;
 292         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 293                 i++;
 294                 if ( be->be_suffix == NULL ) {
 295                         Debug( LDAP_DEBUG_ANY,
 296                                 "backend_startup: warning, database %d (%s) "
 297                                 "has no suffix\n",
 298                                 i, be->bd_info->bi_type, 0 );
 299                 }
 300                 /* append global access controls */
 301                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 302
 303                 rc = backend_startup_one( be );
 304
 305                 if ( rc ) return rc;
 306         }
 307
 308         return rc;
 309 }
 310
 311 int backend_num( Backend *be )
 312 {
 313         int i = 0;
 314         BackendDB *b2;
 315
 316         if( be == NULL ) return -1;
 317
 318         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 319                 if( be == b2 ) return i;
 320                 i++;
 321         }
 322         return -1;
 323 }
 324
 325 int backend_shutdown( Backend *be )
 326 {
 327         int rc = 0;
 328         BackendInfo *bi;
 329
 330         if( be != NULL ) {
 331                 /* shutdown a specific backend database */
 332
 333                 if ( be->bd_info->bi_nDB == 0 ) {
 334                         /* no database of this type, we never opened it */
 335                         return 0;
 336                 }
 337
 338                 if ( be->bd_info->bi_db_close ) {
 339                         be->bd_info->bi_db_close( be );
 340                 }
 341
 342                 if( be->bd_info->bi_close ) {
 343                         be->bd_info->bi_close( be->bd_info );
 344                 }
 345
 346                 return 0;
 347         }
 348
 349         /* close each backend database */
 350         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 351                 if ( be->bd_info->bi_db_close ) {
 352                         be->bd_info->bi_db_close( be );
 353                 }
 354
 355                 if(rc != 0) {
 356                         Debug( LDAP_DEBUG_ANY,
 357                                 "backend_close: bi_db_close %s failed!\n",
 358                                 be->be_type, 0, 0 );
 359                 }
 360         }
 361
 362         /* close each backend type */
 363         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 364                 if( bi->bi_nDB == 0 ) {
 365                         /* no database of this type */
 366                         continue;
 367                 }
 368
 369                 if( bi->bi_close ) {
 370                         bi->bi_close( bi );
 371                 }
 372         }
 373
 374         /* close frontend, if required */
 375         if ( frontendDB->bd_info->bi_db_close ) {
 376                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 377                 if ( rc != 0 ) {
 378                         Debug( LDAP_DEBUG_ANY,
 379                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 380                                 rc, 0, 0 );
 381                 }
 382         }
 383
 384         return 0;
 385 }
 386
 387 /*
 388  * This function is supposed to be the exact counterpart
 389  * of backend_startup_one(), although this one calls bi_db_destroy()
 390  * while backend_startup_one() calls bi_db_open().
 391  *
 392  * Make sure backend_stopdown_one() destroys resources allocated
 393  * by backend_startup_one(); only call backend_destroy_one() when
 394  * all stuff in a BackendDB needs to be destroyed
 395  */
 396 void
 397 backend_stopdown_one( BackendDB *bd )
 398 {
 399         if ( bd->be_pending_csn_list ) {
 400                 struct slap_csn_entry *csne;
 401                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 402                 while ( csne ) {
 403                         struct slap_csn_entry *tmp_csne = csne;
 404
 405                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 406                         ch_free( csne->ce_csn.bv_val );
 407                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 408                         ch_free( tmp_csne );
 409                 }
 410                 ch_free( bd->be_pending_csn_list );
 411         }
 412
 413         if ( bd->bd_info->bi_db_destroy ) {
 414                 bd->bd_info->bi_db_destroy( bd );
 415         }
 416 }
 417
 418 void backend_destroy_one( BackendDB *bd, int dynamic )
 419 {
 420         if ( dynamic ) {
 421                 LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 422         }
 423
 424         if ( bd->be_syncinfo ) {
 425                 syncinfo_free( bd->be_syncinfo );
 426         }
 427
 428         backend_stopdown_one( bd );
 429
 430         ber_bvarray_free( bd->be_suffix );
 431         ber_bvarray_free( bd->be_nsuffix );
 432         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 433                 free( bd->be_rootdn.bv_val );
 434         }
 435         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 436                 free( bd->be_rootndn.bv_val );
 437         }
 438         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 439                 free( bd->be_rootpw.bv_val );
 440         }
 441         acl_destroy( bd->be_acl, frontendDB->be_acl );
 442         limits_destroy( bd->be_limits );
 443         if ( bd->be_replogfile ) {
 444                 ch_free( bd->be_replogfile );
 445         }
 446         if ( bd->be_replica_argsfile ) {
 447                 ch_free( bd->be_replica_argsfile );
 448         }
 449         if ( bd->be_replica_pidfile ) {
 450                 ch_free( bd->be_replica_pidfile );
 451         }
 452         destroy_replica_info( bd );
 453         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 454                 ch_free( bd->be_update_ndn.bv_val );
 455         }
 456         if ( bd->be_update_refs ) {
 457                 ber_bvarray_free( bd->be_update_refs );
 458         }
 459
 460         if ( dynamic ) {
 461                 free( bd );
 462         }
 463 }
 464
 465 int backend_destroy(void)
 466 {
 467         BackendDB *bd;
 468         BackendInfo *bi;
 469
 470         /* destroy each backend database */
 471         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 472                 backend_destroy_one( bd, 1 );
 473         }
 474
 475         /* destroy each backend type */
 476         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 477                 if( bi->bi_destroy ) {
 478                         bi->bi_destroy( bi );
 479                 }
 480         }
 481
 482         nBackendInfo = 0;
 483         LDAP_STAILQ_INIT(&backendInfo);
 484
 485         /* destroy frontend database */
 486         bd = frontendDB;
 487         if ( bd ) {
 488                 if ( bd->bd_info->bi_db_destroy ) {
 489                         bd->bd_info->bi_db_destroy( bd );
 490                 }
 491                 ber_bvarray_free( bd->be_suffix );
 492                 ber_bvarray_free( bd->be_nsuffix );
 493                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 494                         free( bd->be_rootdn.bv_val );
 495                 }
 496                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 497                         free( bd->be_rootndn.bv_val );
 498                 }
 499                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 500                         free( bd->be_rootpw.bv_val );
 501                 }
 502                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 503
 504                 if ( bd->be_replogfile != NULL ) {
 505                         free( bd->be_replogfile );
 506                 }
 507                 if ( bd->be_replica_argsfile ) {
 508                         ch_free( bd->be_replica_argsfile );
 509                 }
 510                 if ( bd->be_replica_pidfile ) {
 511                         ch_free( bd->be_replica_pidfile );
 512                 }
 513                 assert( bd->be_replica == NULL );
 514         }
 515
 516         return 0;
 517 }
 518
 519 BackendInfo* backend_info(const char *type)
 520 {
 521         BackendInfo *bi;
 522
 523         /* search for the backend type */
 524         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 525                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 526                         return bi;
 527                 }
 528         }
 529
 530         return NULL;
 531 }
 532
 533
 534 BackendDB *
 535 backend_db_init(
 536     const char  *type,
 537         BackendDB *be )
 538 {
 539         BackendInfo *bi = backend_info(type);
 540         int     rc = 0;
 541
 542         if( bi == NULL ) {
 543                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 544                 return NULL;
 545         }
 546
 547         /* If be is provided, treat it as private. Otherwise allocate
 548          * one and add it to the global list.
 549          */
 550         if ( !be ) {
 551                 be = ch_calloc( 1, sizeof(Backend) );
 552                 nbackends++;
 553                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 554         }
 555
 556         be->bd_info = bi;
 557
 558         be->be_def_limit = frontendDB->be_def_limit;
 559         be->be_dfltaccess = frontendDB->be_dfltaccess;
 560
 561         be->be_restrictops = frontendDB->be_restrictops;
 562         be->be_requires = frontendDB->be_requires;
 563         be->be_ssf_set = frontendDB->be_ssf_set;
 564
 565         be->be_pcl_mutexp = &be->be_pcl_mutex;
 566         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 567
 568         /* assign a default depth limit for alias deref */
 569         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 570
 571         if ( bi->bi_db_init ) {
 572                 rc = bi->bi_db_init( be );
 573         }
 574
 575         if ( rc != 0 ) {
 576                 fprintf( stderr, "database init failed (%s)\n", type );
 577                 nbackends--;
 578                 return NULL;
 579         }
 580
 581         bi->bi_nDB++;
 582         return( be );
 583 }
 584
 585 void
 586 be_db_close( void )
 587 {
 588         BackendDB *be;
 589
 590         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 591                 if ( be->bd_info->bi_db_close ) {
 592                         be->bd_info->bi_db_close( be );
 593                 }
 594         }
 595
 596         if ( frontendDB->bd_info->bi_db_close ) {
 597                 frontendDB->bd_info->bi_db_close( frontendDB );
 598         }
 599
 600 }
 601
 602 Backend *
 603 select_backend(
 604         struct berval * dn,
 605         int manageDSAit,
 606         int noSubs )
 607 {
 608         int             j;
 609         ber_len_t       len, dnlen = dn->bv_len;
 610         Backend         *be, *b2 = NULL;
 611
 612         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 613                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 614                         continue;
 615                 }
 616
 617                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 618                 {
 619                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 620                         {
 621                                 continue;
 622                         }
 623
 624                         len = be->be_nsuffix[j].bv_len;
 625
 626                         if ( len > dnlen ) {
 627                                 /* suffix is longer than DN */
 628                                 continue;
 629                         }
 630
 631                         /*
 632                          * input DN is normalized, so the separator check
 633                          * need not look at escaping
 634                          */
 635                         if ( len && len < dnlen &&
 636                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 637                         {
 638                                 continue;
 639                         }
 640
 641                         if ( strcmp( be->be_nsuffix[j].bv_val,
 642                                 &dn->bv_val[dnlen-len] ) == 0 )
 643                         {
 644                                 if( b2 == NULL ) {
 645                                         b2 = be;
 646
 647                                         if( manageDSAit && len == dnlen &&
 648                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 649                                                 continue;
 650                                         }
 651                                 } else {
 652                                         /* If any parts of the tree are glued, use the first
 653                                          * match regardless of manageDSAit. Otherwise use the
 654                                          * last match.
 655                                          */
 656                                         if( !( SLAP_DBFLAGS( be ) & ( SLAP_DBFLAG_GLUE_INSTANCE |
 657                                                 SLAP_DBFLAG_GLUE_SUBORDINATE )))
 658                                                 b2 = be;
 659                                 }
 660                                 return b2;
 661                         }
 662                 }
 663         }
 664
 665         return b2;
 666 }
 667
 668 int
 669 be_issuffix(
 670     Backend *be,
 671     struct berval *bvsuffix )
 672 {
 673         int     i;
 674
 675         if ( be->be_nsuffix == NULL ) {
 676                 return 0;
 677         }
 678
 679         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 680                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 681                         return 1;
 682                 }
 683         }
 684
 685         return 0;
 686 }
 687
 688 int
 689 be_isroot_dn( Backend *be, struct berval *ndn )
 690 {
 691         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 692                 return 0;
 693         }
 694
 695         return dn_match( &be->be_rootndn, ndn );
 696 }
 697
 698 int
 699 be_slurp_update( Operation *op )
 700 {
 701         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 702                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 703 }
 704
 705 int
 706 be_shadow_update( Operation *op )
 707 {
 708         /* This assumes that all internal ops (connid == -1) on a syncrepl
 709          * database are syncrepl operations.
 710          */
 711         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 712                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 713 }
 714
 715 int
 716 be_isupdate_dn( Backend *be, struct berval *ndn )
 717 {
 718         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 719                 return 0;
 720         }
 721
 722         return dn_match( &be->be_update_ndn, ndn );
 723 }
 724
 725 struct berval *
 726 be_root_dn( Backend *be )
 727 {
 728         return &be->be_rootdn;
 729 }
 730
 731 int
 732 be_isroot( Operation *op )
 733 {
 734         return be_isroot_dn( op->o_bd, &op->o_ndn );
 735 }
 736
 737 int
 738 be_isroot_pw( Operation *op )
 739 {
 740         int result;
 741
 742         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 743                 return 0;
 744         }
 745
 746         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 747                 return 0;
 748         }
 749
 750 #ifdef SLAPD_SPASSWD
 751         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 752                 op->o_conn->c_sasl_authctx, NULL );
 753 #endif
 754
 755         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 756
 757 #ifdef SLAPD_SPASSWD
 758         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 759 #endif
 760
 761         return result == 0;
 762 }
 763
 764 int
 765 be_entry_release_rw(
 766         Operation *op,
 767         Entry *e,
 768         int rw )
 769 {
 770         if ( op->o_bd->be_release ) {
 771                 /* free and release entry from backend */
 772                 return op->o_bd->be_release( op, e, rw );
 773         } else {
 774                 /* free entry */
 775                 entry_free( e );
 776                 return 0;
 777         }
 778 }
 779
 780 int
 781 backend_unbind( Operation *op, SlapReply *rs )
 782 {
 783         BackendDB *be;
 784
 785         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 786                 if ( be->be_unbind ) {
 787                         op->o_bd = be;
 788                         be->be_unbind( op, rs );
 789                 }
 790         }
 791
 792         return 0;
 793 }
 794
 795 int
 796 backend_connection_init(
 797         Connection   *conn )
 798 {
 799         BackendDB *be;
 800
 801         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 802                 if ( be->be_connection_init ) {
 803                         be->be_connection_init( be, conn );
 804                 }
 805         }
 806
 807         return 0;
 808 }
 809
 810 int
 811 backend_connection_destroy(
 812         Connection   *conn )
 813 {
 814         BackendDB *be;
 815
 816         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 817                 if ( be->be_connection_destroy ) {
 818                         be->be_connection_destroy( be, conn);
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 int
 826 backend_check_controls(
 827         Operation *op,
 828         SlapReply *rs )
 829 {
 830         LDAPControl **ctrls = op->o_ctrls;
 831         rs->sr_err = LDAP_SUCCESS;
 832
 833         if( ctrls ) {
 834                 for( ; *ctrls != NULL ; ctrls++ ) {
 835                         int cid;
 836
 837                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 838                         case LDAP_CONTROL_NOT_FOUND:
 839                                 /* unrecognized control */
 840                                 if ( (*ctrls)->ldctl_iscritical ) {
 841                                         /* should not be reachable */
 842                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 843                                                 "unrecognized critical control: %s\n",
 844                                                 (*ctrls)->ldctl_oid, 0, 0 );
 845                                         assert( 0 );
 846                                 } else {
 847                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 848                                                 "unrecognized non-critical control: %s\n",
 849                                                 (*ctrls)->ldctl_oid, 0, 0 );
 850                                 }
 851                                 break;
 852
 853                         case LDAP_COMPARE_FALSE:
 854                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 855                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 856                                          * is recognized and appropriate for the operation (which
 857                                          * we've already verified), then the server should make
 858                                          * use of the control when performing the operation.
 859                                          *
 860                                          * Here we find that operation extended by the control
 861                                          * is unavailable in a particular context, and the control
 862                                          * is marked Critical, hence the return of
 863                                          * unwillingToPerform.
 864                                          */
 865                                         rs->sr_text = "critical control unavailable in context";
 866                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 867                                         goto done;
 868                                 }
 869                                 break;
 870
 871                         case LDAP_COMPARE_TRUE:
 872                                 break;
 873
 874                         default:
 875                                 /* unreachable */
 876                                 Debug( LDAP_DEBUG_ANY,
 877                                         "backend_check_controls: unable to check control: %s\n",
 878                                         (*ctrls)->ldctl_oid, 0, 0 );
 879                                 assert( 0 );
 880
 881                                 rs->sr_text = "unable to check control";
 882                                 rs->sr_err = LDAP_OTHER;
 883                                 goto done;
 884                         }
 885                 }
 886         }
 887
 888 #if 0 /* temporarily removed */
 889         /* check should be generalized */
 890         if( get_relax(op) && !be_isroot(op)) {
 891                 rs->sr_text = "requires manager authorization";
 892                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 893         }
 894 #endif
 895
 896 done:;
 897         return rs->sr_err;
 898 }
 899
 900 int
 901 backend_check_restrictions(
 902         Operation *op,
 903         SlapReply *rs,
 904         struct berval *opdata )
 905 {
 906         slap_mask_t restrictops;
 907         slap_mask_t requires;
 908         slap_mask_t opflag;
 909         slap_mask_t exopflag = 0;
 910         slap_ssf_set_t *ssf;
 911         int updateop = 0;
 912         int starttls = 0;
 913         int session = 0;
 914
 915         if ( op->o_bd ) {
 916                 int     rc = SLAP_CB_CONTINUE;
 917
 918                 if ( op->o_bd->be_chk_controls ) {
 919                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 920                 }
 921
 922                 if ( rc == SLAP_CB_CONTINUE ) {
 923                         rc = backend_check_controls( op, rs );
 924                 }
 925
 926                 if ( rc != LDAP_SUCCESS ) {
 927                         return rs->sr_err;
 928                 }
 929
 930                 restrictops = op->o_bd->be_restrictops;
 931                 requires = op->o_bd->be_requires;
 932                 ssf = &op->o_bd->be_ssf_set;
 933
 934         } else {
 935                 restrictops = frontendDB->be_restrictops;
 936                 requires = frontendDB->be_requires;
 937                 ssf = &frontendDB->be_ssf_set;
 938         }
 939
 940         switch( op->o_tag ) {
 941         case LDAP_REQ_ADD:
 942                 opflag = SLAP_RESTRICT_OP_ADD;
 943                 updateop++;
 944                 break;
 945         case LDAP_REQ_BIND:
 946                 opflag = SLAP_RESTRICT_OP_BIND;
 947                 session++;
 948                 break;
 949         case LDAP_REQ_COMPARE:
 950                 opflag = SLAP_RESTRICT_OP_COMPARE;
 951                 break;
 952         case LDAP_REQ_DELETE:
 953                 updateop++;
 954                 opflag = SLAP_RESTRICT_OP_DELETE;
 955                 break;
 956         case LDAP_REQ_EXTENDED:
 957                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 958
 959                 if( !opdata ) {
 960                         /* treat unspecified as a modify */
 961                         opflag = SLAP_RESTRICT_OP_MODIFY;
 962                         updateop++;
 963                         break;
 964                 }
 965
 966                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 967                         session++;
 968                         starttls++;
 969                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 970                         break;
 971                 }
 972
 973                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 974                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 975                         break;
 976                 }
 977
 978                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 979                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 980                         break;
 981                 }
 982
 983                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 984                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 985                         updateop++;
 986                         break;
 987                 }
 988
 989                 /* treat everything else as a modify */
 990                 opflag = SLAP_RESTRICT_OP_MODIFY;
 991                 updateop++;
 992                 break;
 993
 994         case LDAP_REQ_MODIFY:
 995                 updateop++;
 996                 opflag = SLAP_RESTRICT_OP_MODIFY;
 997                 break;
 998         case LDAP_REQ_RENAME:
 999                 updateop++;
1000                 opflag = SLAP_RESTRICT_OP_RENAME;
1001                 break;
1002         case LDAP_REQ_SEARCH:
1003                 opflag = SLAP_RESTRICT_OP_SEARCH;
1004                 break;
1005         case LDAP_REQ_UNBIND:
1006                 session++;
1007                 opflag = 0;
1008                 break;
1009         default:
1010                 rs->sr_text = "restrict operations internal error";
1011                 rs->sr_err = LDAP_OTHER;
1012                 return rs->sr_err;
1013         }
1014
1015         if ( !starttls ) {
1016                 /* these checks don't apply to StartTLS */
1017
1018                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1019                 if( op->o_transport_ssf < ssf->sss_transport ) {
1020                         rs->sr_text = op->o_transport_ssf
1021                                 ? "stronger transport confidentiality required"
1022                                 : "transport confidentiality required";
1023                         return rs->sr_err;
1024                 }
1025
1026                 if( op->o_tls_ssf < ssf->sss_tls ) {
1027                         rs->sr_text = op->o_tls_ssf
1028                                 ? "stronger TLS confidentiality required"
1029                                 : "TLS confidentiality required";
1030                         return rs->sr_err;
1031                 }
1032
1033
1034                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1035                         /* simple bind specific check */
1036                         if( op->o_ssf < ssf->sss_simple_bind ) {
1037                                 rs->sr_text = op->o_ssf
1038                                         ? "stronger confidentiality required"
1039                                         : "confidentiality required";
1040                                 return rs->sr_err;
1041                         }
1042                 }
1043
1044                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1045                         /* these checks don't apply to SASL bind */
1046
1047                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1048                                 rs->sr_text = op->o_sasl_ssf
1049                                         ? "stronger SASL confidentiality required"
1050                                         : "SASL confidentiality required";
1051                                 return rs->sr_err;
1052                         }
1053
1054                         if( op->o_ssf < ssf->sss_ssf ) {
1055                                 rs->sr_text = op->o_ssf
1056                                         ? "stronger confidentiality required"
1057                                         : "confidentiality required";
1058                                 return rs->sr_err;
1059                         }
1060                 }
1061
1062                 if( updateop ) {
1063                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1064                                 rs->sr_text = op->o_transport_ssf
1065                                         ? "stronger transport confidentiality required for update"
1066                                         : "transport confidentiality required for update";
1067                                 return rs->sr_err;
1068                         }
1069
1070                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1071                                 rs->sr_text = op->o_tls_ssf
1072                                         ? "stronger TLS confidentiality required for update"
1073                                         : "TLS confidentiality required for update";
1074                                 return rs->sr_err;
1075                         }
1076
1077                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1078                                 rs->sr_text = op->o_sasl_ssf
1079                                         ? "stronger SASL confidentiality required for update"
1080                                         : "SASL confidentiality required for update";
1081                                 return rs->sr_err;
1082                         }
1083
1084                         if( op->o_ssf < ssf->sss_update_ssf ) {
1085                                 rs->sr_text = op->o_ssf
1086                                         ? "stronger confidentiality required for update"
1087                                         : "confidentiality required for update";
1088                                 return rs->sr_err;
1089                         }
1090
1091                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1092                                 BER_BVISEMPTY( &op->o_ndn ) )
1093                         {
1094                                 rs->sr_text = "modifications require authentication";
1095                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1096                                 return rs->sr_err;
1097                         }
1098
1099 #ifdef SLAP_X_LISTENER_MOD
1100                         if ( op->o_conn->c_listener &&
1101                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1102                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1103                         {
1104                                 /* no "w" mode means readonly */
1105                                 rs->sr_text = "modifications not allowed on this listener";
1106                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1107                                 return rs->sr_err;
1108                         }
1109 #endif /* SLAP_X_LISTENER_MOD */
1110                 }
1111         }
1112
1113         if ( !session ) {
1114                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1115
1116                 if( requires & SLAP_REQUIRE_STRONG ) {
1117                         /* should check mechanism */
1118                         if( ( op->o_transport_ssf < ssf->sss_transport
1119                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1120                                 || BER_BVISEMPTY( &op->o_dn ) )
1121                         {
1122                                 rs->sr_text = "strong(er) authentication required";
1123                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1124                                 return rs->sr_err;
1125                         }
1126                 }
1127
1128                 if( requires & SLAP_REQUIRE_SASL ) {
1129                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1130                                 rs->sr_text = "SASL authentication required";
1131                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1132                                 return rs->sr_err;
1133                         }
1134                 }
1135
1136                 if( requires & SLAP_REQUIRE_AUTHC ) {
1137                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1138                                 rs->sr_text = "authentication required";
1139                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1140                                 return rs->sr_err;
1141                         }
1142                 }
1143
1144                 if( requires & SLAP_REQUIRE_BIND ) {
1145                         int version;
1146                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1147                         version = op->o_conn->c_protocol;
1148                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1149
1150                         if( !version ) {
1151                                 /* no bind has occurred */
1152                                 rs->sr_text = "BIND required";
1153                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1154                                 return rs->sr_err;
1155                         }
1156                 }
1157
1158                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1159                         if( op->o_protocol < LDAP_VERSION3 ) {
1160                                 /* no bind has occurred */
1161                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1162                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1163                                 return rs->sr_err;
1164                         }
1165                 }
1166
1167 #ifdef SLAP_X_LISTENER_MOD
1168                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1169                         if ( op->o_conn->c_listener &&
1170                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1171                 {
1172                                 /* no "x" mode means bind required */
1173                                 rs->sr_text = "bind required on this listener";
1174                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1175                                 return rs->sr_err;
1176                         }
1177                 }
1178
1179                 if ( !starttls && !updateop ) {
1180                         if ( op->o_conn->c_listener &&
1181                                 !( op->o_conn->c_listener->sl_perms &
1182                                         ( !BER_BVISEMPTY( &op->o_dn )
1183                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1184                         {
1185                                 /* no "r" mode means no read */
1186                                 rs->sr_text = "read not allowed on this listener";
1187                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1188                                 return rs->sr_err;
1189                         }
1190                 }
1191 #endif /* SLAP_X_LISTENER_MOD */
1192
1193         }
1194
1195         if( ( restrictops & opflag )
1196                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1197                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1198                         rs->sr_text = "read operations restricted";
1199                 } else if ( restrictops & exopflag ) {
1200                         rs->sr_text = "extended operation restricted";
1201                 } else {
1202                         rs->sr_text = "operation restricted";
1203                 }
1204                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1205                 return rs->sr_err;
1206         }
1207
1208         rs->sr_err = LDAP_SUCCESS;
1209         return rs->sr_err;
1210 }
1211
1212 int backend_check_referrals( Operation *op, SlapReply *rs )
1213 {
1214         rs->sr_err = LDAP_SUCCESS;
1215
1216         if( op->o_bd->be_chk_referrals ) {
1217                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1218
1219                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1220                         send_ldap_result( op, rs );
1221                 }
1222         }
1223
1224         return rs->sr_err;
1225 }
1226
1227 int
1228 be_entry_get_rw(
1229         Operation *op,
1230         struct berval *ndn,
1231         ObjectClass *oc,
1232         AttributeDescription *at,
1233         int rw,
1234         Entry **e )
1235 {
1236         *e = NULL;
1237
1238         if ( op->o_bd == NULL ) {
1239                 return LDAP_NO_SUCH_OBJECT;
1240         }
1241
1242         if ( op->o_bd->be_fetch ) {
1243                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1244         }
1245
1246         return LDAP_UNWILLING_TO_PERFORM;
1247 }
1248
1249 int
1250 fe_acl_group(
1251         Operation *op,
1252         Entry   *target,
1253         struct berval *gr_ndn,
1254         struct berval *op_ndn,
1255         ObjectClass *group_oc,
1256         AttributeDescription *group_at )
1257 {
1258         Entry *e;
1259         void *o_priv = op->o_private, *e_priv = NULL;
1260         Attribute *a;
1261         int rc;
1262         GroupAssertion *g;
1263         Backend *be = op->o_bd;
1264
1265         op->o_bd = select_backend( gr_ndn, 0, 0 );
1266
1267         for ( g = op->o_groups; g; g = g->ga_next ) {
1268                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1269                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1270                 {
1271                         continue;
1272                 }
1273                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1274                         break;
1275                 }
1276         }
1277
1278         if ( g ) {
1279                 rc = g->ga_res;
1280                 goto done;
1281         }
1282
1283         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1284                 e = target;
1285                 rc = 0;
1286         } else {
1287                 op->o_private = NULL;
1288                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1289                 e_priv = op->o_private;
1290                 op->o_private = o_priv;
1291         }
1292         if ( e ) {
1293                 a = attr_find( e->e_attrs, group_at );
1294                 if ( a ) {
1295                         /* If the attribute is a subtype of labeledURI, treat this as
1296                          * a dynamic group ala groupOfURLs
1297                          */
1298                         if (is_at_subtype( group_at->ad_type,
1299                                 slap_schema.si_ad_labeledURI->ad_type ) )
1300                         {
1301                                 int i;
1302                                 LDAPURLDesc *ludp;
1303                                 struct berval bv, nbase;
1304                                 Filter *filter;
1305                                 Entry *user;
1306                                 void *user_priv = NULL;
1307                                 Backend *b2 = op->o_bd;
1308
1309                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1310                                         user = target;
1311                                 } else {
1312                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1313                                         op->o_private = NULL;
1314                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1315                                         user_priv = op->o_private;
1316                                         op->o_private = o_priv;
1317                                 }
1318
1319                                 if ( rc == 0 ) {
1320                                         rc = LDAP_COMPARE_FALSE;
1321                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1322                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1323                                                         LDAP_URL_SUCCESS )
1324                                                 {
1325                                                         continue;
1326                                                 }
1327                                                 BER_BVZERO( &nbase );
1328                                                 /* host part must be empty */
1329                                                 /* attrs and extensions parts must be empty */
1330                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1331                                                         ludp->lud_attrs || ludp->lud_exts )
1332                                                 {
1333                                                         goto loopit;
1334                                                 }
1335                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1336                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1337                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1338                                                 {
1339                                                         goto loopit;
1340                                                 }
1341                                                 switch ( ludp->lud_scope ) {
1342                                                 case LDAP_SCOPE_BASE:
1343                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1344                                                                 goto loopit;
1345                                                         }
1346                                                         break;
1347                                                 case LDAP_SCOPE_ONELEVEL:
1348                                                         dnParent( op_ndn, &bv );
1349                                                         if ( !dn_match( &nbase, &bv ) ) {
1350                                                                 goto loopit;
1351                                                         }
1352                                                         break;
1353                                                 case LDAP_SCOPE_SUBTREE:
1354                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1355                                                                 goto loopit;
1356                                                         }
1357                                                         break;
1358                                                 case LDAP_SCOPE_SUBORDINATE:
1359                                                         if ( dn_match( &nbase, op_ndn ) ||
1360                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1361                                                         {
1362                                                                 goto loopit;
1363                                                         }
1364                                                 }
1365                                                 filter = str2filter_x( op, ludp->lud_filter );
1366                                                 if ( filter ) {
1367                                                         if ( test_filter( NULL, user, filter ) ==
1368                                                                 LDAP_COMPARE_TRUE )
1369                                                         {
1370                                                                 rc = 0;
1371                                                         }
1372                                                         filter_free_x( op, filter );
1373                                                 }
1374 loopit:
1375                                                 ldap_free_urldesc( ludp );
1376                                                 if ( !BER_BVISNULL( &nbase ) ) {
1377                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1378                                                 }
1379                                                 if ( rc == 0 ) break;
1380                                         }
1381                                         if ( user != target ) {
1382                                                 op->o_private = user_priv;
1383                                                 be_entry_release_r( op, user );
1384                                                 op->o_private = o_priv;
1385                                         }
1386                                 }
1387                                 op->o_bd = b2;
1388                         } else {
1389                                 rc = value_find_ex( group_at,
1390                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1391                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1392                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1393                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1394                                         rc = LDAP_COMPARE_FALSE;
1395                         }
1396                 } else {
1397                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1398                 }
1399                 if ( e != target ) {
1400                         op->o_private = e_priv;
1401                         be_entry_release_r( op, e );
1402                         op->o_private = o_priv;
1403                 }
1404         } else {
1405                 rc = LDAP_NO_SUCH_OBJECT;
1406         }
1407
1408         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1409                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1410                         op->o_tmpmemctx );
1411                 g->ga_be = op->o_bd;
1412                 g->ga_oc = group_oc;
1413                 g->ga_at = group_at;
1414                 g->ga_res = rc;
1415                 g->ga_len = gr_ndn->bv_len;
1416                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1417                 g->ga_next = op->o_groups;
1418                 op->o_groups = g;
1419         }
1420 done:
1421         op->o_bd = be;
1422         return rc;
1423 }
1424
1425 int
1426 backend_group(
1427         Operation *op,
1428         Entry   *target,
1429         struct berval *gr_ndn,
1430         struct berval *op_ndn,
1431         ObjectClass *group_oc,
1432         AttributeDescription *group_at )
1433 {
1434         int                     rc;
1435         BackendDB               *be_orig;
1436
1437         if ( op->o_abandon ) {
1438                 return SLAPD_ABANDON;
1439         }
1440
1441         be_orig = op->o_bd;
1442         op->o_bd = frontendDB;
1443         rc = frontendDB->be_group( op, target, gr_ndn,
1444                 op_ndn, group_oc, group_at );
1445         op->o_bd = be_orig;
1446
1447         return rc;
1448 }
1449
1450 int
1451 fe_acl_attribute(
1452         Operation *op,
1453         Entry   *target,
1454         struct berval   *edn,
1455         AttributeDescription *entry_at,
1456         BerVarray *vals,
1457         slap_access_t access )
1458 {
1459         Entry                   *e = NULL;
1460         void                    *o_priv = op->o_private, *e_priv = NULL;
1461         Attribute               *a = NULL;
1462         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1463         AccessControlState      acl_state = ACL_STATE_INIT;
1464         Backend                 *be = op->o_bd;
1465
1466         op->o_bd = select_backend( edn, 0, 0 );
1467
1468         if ( target && dn_match( &target->e_nname, edn ) ) {
1469                 e = target;
1470
1471         } else {
1472                 op->o_private = NULL;
1473                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1474                 e_priv = op->o_private;
1475                 op->o_private = o_priv;
1476         }
1477
1478         if ( e ) {
1479                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1480                         assert( vals == NULL );
1481
1482                         rc = LDAP_SUCCESS;
1483                         if ( op->o_conn && access > ACL_NONE &&
1484                                 access_allowed( op, e, entry_at, NULL,
1485                                                 access, &acl_state ) == 0 )
1486                         {
1487                                 rc = LDAP_INSUFFICIENT_ACCESS;
1488                         }
1489                         goto freeit;
1490                 }
1491
1492                 a = attr_find( e->e_attrs, entry_at );
1493                 if ( a == NULL ) {
1494                         SlapReply       rs = { 0 };
1495                         AttributeName   anlist[ 2 ];
1496
1497                         anlist[ 0 ].an_name = entry_at->ad_cname;
1498                         anlist[ 0 ].an_desc = entry_at;
1499                         BER_BVZERO( &anlist[ 1 ].an_name );
1500                         rs.sr_attrs = anlist;
1501
1502                         /* NOTE: backend_operational() is also called
1503                          * when returning results, so it's supposed
1504                          * to do no harm to entries */
1505                         rs.sr_entry = e;
1506                         rc = backend_operational( op, &rs );
1507                         rs.sr_entry = NULL;
1508
1509                         if ( rc == LDAP_SUCCESS ) {
1510                                 if ( rs.sr_operational_attrs ) {
1511                                         freeattr = 1;
1512                                         a = rs.sr_operational_attrs;
1513
1514                                 } else {
1515                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1516                                 }
1517                         }
1518                 }
1519
1520                 if ( a ) {
1521                         BerVarray v;
1522
1523                         if ( op->o_conn && access > ACL_NONE &&
1524                                 access_allowed( op, e, entry_at, NULL,
1525                                                 access, &acl_state ) == 0 )
1526                         {
1527                                 rc = LDAP_INSUFFICIENT_ACCESS;
1528                                 goto freeit;
1529                         }
1530
1531                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1532                                 ;
1533
1534                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1535                                 op->o_tmpmemctx );
1536                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1537                         {
1538                                 if ( op->o_conn && access > ACL_NONE &&
1539                                         access_allowed( op, e, entry_at,
1540                                                         &a->a_nvals[i],
1541                                                         access,
1542                                                         &acl_state ) == 0 )
1543                                 {
1544                                         continue;
1545                                 }
1546                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1547                                                 op->o_tmpmemctx );
1548                                 if ( !BER_BVISNULL( &v[j] ) ) {
1549                                         j++;
1550                                 }
1551                         }
1552                         if ( j == 0 ) {
1553                                 op->o_tmpfree( v, op->o_tmpmemctx );
1554                                 *vals = NULL;
1555                                 rc = LDAP_INSUFFICIENT_ACCESS;
1556
1557                         } else {
1558                                 BER_BVZERO( &v[j] );
1559                                 *vals = v;
1560                                 rc = LDAP_SUCCESS;
1561                         }
1562                 }
1563 freeit:         if ( e != target ) {
1564                         op->o_private = e_priv;
1565                         be_entry_release_r( op, e );
1566                         op->o_private = o_priv;
1567                 }
1568                 if ( freeattr ) {
1569                         attr_free( a );
1570                 }
1571         }
1572
1573         op->o_bd = be;
1574         return rc;
1575 }
1576
1577 int
1578 backend_attribute(
1579         Operation *op,
1580         Entry   *target,
1581         struct berval   *edn,
1582         AttributeDescription *entry_at,
1583         BerVarray *vals,
1584         slap_access_t access )
1585 {
1586         int                     rc;
1587         BackendDB               *be_orig;
1588
1589         be_orig = op->o_bd;
1590         op->o_bd = frontendDB;
1591         rc = frontendDB->be_attribute( op, target, edn,
1592                 entry_at, vals, access );
1593         op->o_bd = be_orig;
1594
1595         return rc;
1596 }
1597
1598 int
1599 backend_access(
1600         Operation               *op,
1601         Entry                   *target,
1602         struct berval           *edn,
1603         AttributeDescription    *entry_at,
1604         struct berval           *nval,
1605         slap_access_t           access,
1606         slap_mask_t             *mask )
1607 {
1608         Entry           *e = NULL;
1609         void            *o_priv = op->o_private, *e_priv = NULL;
1610         int             rc = LDAP_INSUFFICIENT_ACCESS;
1611         Backend         *be = op->o_bd;
1612
1613         /* pedantic */
1614         assert( op != NULL );
1615         assert( op->o_conn != NULL );
1616         assert( edn != NULL );
1617         assert( access > ACL_NONE );
1618
1619         op->o_bd = select_backend( edn, 0, 0 );
1620
1621         if ( target && dn_match( &target->e_nname, edn ) ) {
1622                 e = target;
1623
1624         } else {
1625                 op->o_private = NULL;
1626                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1627                 e_priv = op->o_private;
1628                 op->o_private = o_priv;
1629         }
1630
1631         if ( e ) {
1632                 Attribute       *a = NULL;
1633                 int             freeattr = 0;
1634
1635                 if ( entry_at == NULL ) {
1636                         entry_at = slap_schema.si_ad_entry;
1637                 }
1638
1639                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1640                 {
1641                         if ( access_allowed_mask( op, e, entry_at,
1642                                         NULL, access, NULL, mask ) == 0 )
1643                         {
1644                                 rc = LDAP_INSUFFICIENT_ACCESS;
1645
1646                         } else {
1647                                 rc = LDAP_SUCCESS;
1648                         }
1649
1650                 } else {
1651                         a = attr_find( e->e_attrs, entry_at );
1652                         if ( a == NULL ) {
1653                                 SlapReply       rs = { 0 };
1654                                 AttributeName   anlist[ 2 ];
1655
1656                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1657                                 anlist[ 0 ].an_desc = entry_at;
1658                                 BER_BVZERO( &anlist[ 1 ].an_name );
1659                                 rs.sr_attrs = anlist;
1660
1661                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1662
1663                                 /* NOTE: backend_operational() is also called
1664                                  * when returning results, so it's supposed
1665                                  * to do no harm to entries */
1666                                 rs.sr_entry = e;
1667                                 rc = backend_operational( op, &rs );
1668                                 rs.sr_entry = NULL;
1669
1670                                 if ( rc == LDAP_SUCCESS ) {
1671                                         if ( rs.sr_operational_attrs ) {
1672                                                 freeattr = 1;
1673                                                 a = rs.sr_operational_attrs;
1674
1675                                         } else {
1676                                                 rc = LDAP_NO_SUCH_OBJECT;
1677                                         }
1678                                 }
1679                         }
1680
1681                         if ( a ) {
1682                                 if ( access_allowed_mask( op, e, entry_at,
1683                                                 nval, access, NULL, mask ) == 0 )
1684                                 {
1685                                         rc = LDAP_INSUFFICIENT_ACCESS;
1686                                         goto freeit;
1687                                 }
1688                                 rc = LDAP_SUCCESS;
1689                         }
1690                 }
1691 freeit:         if ( e != target ) {
1692                         op->o_private = e_priv;
1693                         be_entry_release_r( op, e );
1694                         op->o_private = o_priv;
1695                 }
1696                 if ( freeattr ) {
1697                         attr_free( a );
1698                 }
1699         }
1700
1701         op->o_bd = be;
1702         return rc;
1703 }
1704
1705 int
1706 fe_aux_operational(
1707         Operation *op,
1708         SlapReply *rs )
1709 {
1710         Attribute               **ap;
1711         int                     rc = 0;
1712         BackendDB               *be_orig;
1713
1714         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1715                 /* just count them */ ;
1716
1717         /*
1718          * If operational attributes (allegedly) are required,
1719          * and the backend supports specific operational attributes,
1720          * add them to the attribute list
1721          */
1722         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1723                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1724                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1725         {
1726                 *ap = slap_operational_entryDN( rs->sr_entry );
1727                 ap = &(*ap)->a_next;
1728         }
1729
1730         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1731                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1732                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1733         {
1734                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1735                 ap = &(*ap)->a_next;
1736         }
1737
1738         if ( op->o_bd != NULL )
1739         {
1740                 /* Let the overlays have a chance at this */
1741                 be_orig = op->o_bd;
1742                 op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
1743                 if ( !be_match( op->o_bd, frontendDB ) &&
1744                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1745                         op->o_bd != NULL && op->o_bd->be_operational != NULL )
1746                 {
1747                         rc = op->o_bd->be_operational( op, rs );
1748                 }
1749                 op->o_bd = be_orig;
1750         }
1751
1752         return rc;
1753 }
1754
1755 int backend_operational( Operation *op, SlapReply *rs )
1756 {
1757         int rc;
1758         BackendDB *be_orig;
1759
1760         /* Moved this into the frontend so global overlays are called */
1761
1762         be_orig = op->o_bd;
1763         op->o_bd = frontendDB;
1764         rc = frontendDB->be_operational( op, rs );
1765         op->o_bd = be_orig;
1766
1767         return rc;
1768 }
1769