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 "config.h"
  38 #include "lutil.h"
  39 #include "lber_pvt.h"
  40
  41 /*
  42  * If a module is configured as dynamic, its header should not
  43  * get included into slapd. While this is a general rule and does
  44  * not have much of an effect in UNIX, this rule should be adhered
  45  * to for Windows, where dynamic object code should not be implicitly
  46  * imported into slapd without appropriate __declspec(dllimport) directives.
  47  */
  48
  49 int                     nBackendInfo = 0;
  50 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  51
  52 int                     nBackendDB = 0;
  53 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  54
  55 static int
  56 backend_init_controls( BackendInfo *bi )
  57 {
  58         if ( bi->bi_controls ) {
  59                 int     i;
  60
  61                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  62                         int     cid;
  63
  64                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  65                                         == LDAP_CONTROL_NOT_FOUND )
  66                         {
  67                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  68                                         assert( 0 );
  69                                 }
  70
  71                                 return -1;
  72                         }
  73
  74                         bi->bi_ctrls[ cid ] = 1;
  75                 }
  76         }
  77
  78         return 0;
  79 }
  80
  81 int backend_init(void)
  82 {
  83         int rc = -1;
  84         BackendInfo *bi;
  85
  86         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  87                 /* already initialized */
  88                 Debug( LDAP_DEBUG_ANY,
  89                         "backend_init: already initialized\n", 0, 0, 0 );
  90                 return -1;
  91         }
  92
  93         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  94                 assert( bi->bi_init != 0 );
  95
  96                 rc = bi->bi_init( bi );
  97
  98                 if(rc != 0) {
  99                         Debug( LDAP_DEBUG_ANY,
 100                                 "backend_init: initialized for type \"%s\"\n",
 101                                 bi->bi_type, 0, 0 );
 102                         /* destroy those we've already inited */
 103                         for( nBackendInfo--;
 104                                 nBackendInfo >= 0 ;
 105                                 nBackendInfo-- )
 106                         {
 107                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 108                                         slap_binfo[nBackendInfo].bi_destroy(
 109                                                 &slap_binfo[nBackendInfo] );
 110                                 }
 111                         }
 112                         return rc;
 113                 }
 114
 115                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 116         }
 117
 118         if ( nBackendInfo > 0) {
 119                 return 0;
 120         }
 121
 122 #ifdef SLAPD_MODULES
 123         return 0;
 124 #else
 125
 126         Debug( LDAP_DEBUG_ANY,
 127                 "backend_init: failed\n",
 128                 0, 0, 0 );
 129
 130         return rc;
 131 #endif /* SLAPD_MODULES */
 132 }
 133
 134 int backend_add(BackendInfo *aBackendInfo)
 135 {
 136         int rc = 0;
 137
 138         if ( aBackendInfo->bi_init == NULL ) {
 139                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 140                         "backend type \"%s\" does not have the (mandatory)init function\n",
 141                         aBackendInfo->bi_type, 0, 0 );
 142                 return -1;
 143         }
 144
 145         rc = aBackendInfo->bi_init(aBackendInfo);
 146         if ( rc != 0) {
 147                 Debug( LDAP_DEBUG_ANY,
 148                         "backend_add:  initialization for type \"%s\" failed\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return rc;
 151         }
 152
 153         (void)backend_init_controls( aBackendInfo );
 154
 155         /* now add the backend type to the Backend Info List */
 156         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 157         nBackendInfo++;
 158         return 0;
 159 }
 160
 161 static int
 162 backend_set_controls( BackendDB *be )
 163 {
 164         BackendInfo     *bi = be->bd_info;
 165
 166         /* back-relay takes care of itself; so may do other */
 167         if ( overlay_is_over( be ) ) {
 168                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 169         }
 170
 171         if ( bi->bi_controls ) {
 172                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 173                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 174                                         sizeof( be->be_ctrls ) );
 175                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 176
 177                 } else {
 178                         int     i;
 179
 180                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 181                                 if ( bi->bi_ctrls[ i ] ) {
 182                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 183                                 }
 184                         }
 185                 }
 186
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* startup a specific backend database */
 193 int backend_startup_one(Backend *be, ConfigReply *cr)
 194 {
 195         int             rc = 0;
 196
 197         assert( be != NULL );
 198
 199         be->be_pending_csn_list = (struct be_pcl *)
 200                 ch_calloc( 1, sizeof( struct be_pcl ) );
 201
 202         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 203
 204         Debug( LDAP_DEBUG_TRACE,
 205                 "backend_startup_one: starting \"%s\"\n",
 206                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 207                 0, 0 );
 208
 209         /* set database controls */
 210         (void)backend_set_controls( be );
 211
 212         if ( be->bd_info->bi_db_open ) {
 213                 rc = be->bd_info->bi_db_open( be, cr );
 214                 if ( rc == 0 ) {
 215                         (void)backend_set_controls( be );
 216
 217                 } else {
 218                         Debug( LDAP_DEBUG_ANY,
 219                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 220                                 rc, 0, 0 );
 221                 }
 222         }
 223
 224         return rc;
 225 }
 226
 227 int backend_startup(Backend *be)
 228 {
 229         int i;
 230         int rc = 0;
 231         BackendInfo *bi;
 232         ConfigReply cr={0, ""};
 233
 234         if( ! ( nBackendDB > 0 ) ) {
 235                 /* no databases */
 236                 Debug( LDAP_DEBUG_ANY,
 237                         "backend_startup: %d databases to startup.\n",
 238                         nBackendDB, 0, 0 );
 239                 return 1;
 240         }
 241
 242         if(be != NULL) {
 243                 if ( be->bd_info->bi_open ) {
 244                         rc = be->bd_info->bi_open( be->bd_info );
 245                         if ( rc != 0 ) {
 246                                 Debug( LDAP_DEBUG_ANY,
 247                                         "backend_startup: bi_open failed!\n",
 248                                         0, 0, 0 );
 249
 250                                 return rc;
 251                         }
 252                 }
 253                 /* append global access controls */
 254                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 255
 256                 return backend_startup_one( be, &cr );
 257         }
 258
 259         /* open frontend, if required */
 260         if ( frontendDB->bd_info->bi_db_open ) {
 261                 rc = frontendDB->bd_info->bi_db_open( frontendDB, NULL );
 262                 if ( rc != 0 ) {
 263                         Debug( LDAP_DEBUG_ANY,
 264                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 265                                 rc, 0, 0 );
 266                         return rc;
 267                 }
 268         }
 269
 270         /* open each backend type */
 271         i = -1;
 272         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 273                 i++;
 274                 if( bi->bi_nDB == 0) {
 275                         /* no database of this type, don't open */
 276                         continue;
 277                 }
 278
 279                 if( bi->bi_open ) {
 280                         rc = bi->bi_open( bi );
 281                         if ( rc != 0 ) {
 282                                 Debug( LDAP_DEBUG_ANY,
 283                                         "backend_startup: bi_open %d (%s) failed!\n",
 284                                         i, bi->bi_type, 0 );
 285                                 return rc;
 286                         }
 287                 }
 288
 289                 (void)backend_init_controls( bi );
 290         }
 291
 292         /* open each backend database */
 293         i = -1;
 294         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 295                 i++;
 296                 if ( be->be_suffix == NULL ) {
 297                         Debug( LDAP_DEBUG_ANY,
 298                                 "backend_startup: warning, database %d (%s) "
 299                                 "has no suffix\n",
 300                                 i, be->bd_info->bi_type, 0 );
 301                 }
 302                 /* append global access controls */
 303                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 304
 305                 rc = backend_startup_one( be, &cr );
 306
 307                 if ( rc ) return rc;
 308         }
 309
 310         return rc;
 311 }
 312
 313 int backend_num( Backend *be )
 314 {
 315         int i = 0;
 316         BackendDB *b2;
 317
 318         if( be == NULL ) return -1;
 319
 320         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 321                 if( be == b2 ) return i;
 322                 i++;
 323         }
 324         return -1;
 325 }
 326
 327 int backend_shutdown( Backend *be )
 328 {
 329         int rc = 0;
 330         BackendInfo *bi;
 331
 332         if( be != NULL ) {
 333                 /* shutdown a specific backend database */
 334
 335                 if ( be->bd_info->bi_nDB == 0 ) {
 336                         /* no database of this type, we never opened it */
 337                         return 0;
 338                 }
 339
 340                 if ( be->bd_info->bi_db_close ) {
 341                         be->bd_info->bi_db_close( be, NULL );
 342                 }
 343
 344                 if( be->bd_info->bi_close ) {
 345                         be->bd_info->bi_close( be->bd_info );
 346                 }
 347
 348                 return 0;
 349         }
 350
 351         /* close each backend database */
 352         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 353                 if ( be->bd_info->bi_db_close ) {
 354                         be->bd_info->bi_db_close( be, NULL );
 355                 }
 356
 357                 if(rc != 0) {
 358                         Debug( LDAP_DEBUG_ANY,
 359                                 "backend_close: bi_db_close %s failed!\n",
 360                                 be->be_type, 0, 0 );
 361                 }
 362         }
 363
 364         /* close each backend type */
 365         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 366                 if( bi->bi_nDB == 0 ) {
 367                         /* no database of this type */
 368                         continue;
 369                 }
 370
 371                 if( bi->bi_close ) {
 372                         bi->bi_close( bi );
 373                 }
 374         }
 375
 376         /* close frontend, if required */
 377         if ( frontendDB->bd_info->bi_db_close ) {
 378                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 379                 if ( rc != 0 ) {
 380                         Debug( LDAP_DEBUG_ANY,
 381                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 382                                 rc, 0, 0 );
 383                 }
 384         }
 385
 386         return 0;
 387 }
 388
 389 /*
 390  * This function is supposed to be the exact counterpart
 391  * of backend_startup_one(), although this one calls bi_db_destroy()
 392  * while backend_startup_one() calls bi_db_open().
 393  *
 394  * Make sure backend_stopdown_one() destroys resources allocated
 395  * by backend_startup_one(); only call backend_destroy_one() when
 396  * all stuff in a BackendDB needs to be destroyed
 397  */
 398 void
 399 backend_stopdown_one( BackendDB *bd )
 400 {
 401         if ( bd->be_pending_csn_list ) {
 402                 struct slap_csn_entry *csne;
 403                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 404                 while ( csne ) {
 405                         struct slap_csn_entry *tmp_csne = csne;
 406
 407                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 408                         ch_free( csne->ce_csn.bv_val );
 409                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 410                         ch_free( tmp_csne );
 411                 }
 412                 ch_free( bd->be_pending_csn_list );
 413         }
 414
 415         if ( bd->bd_info->bi_db_destroy ) {
 416                 bd->bd_info->bi_db_destroy( bd, NULL );
 417         }
 418 }
 419
 420 void backend_destroy_one( BackendDB *bd, int dynamic )
 421 {
 422         if ( dynamic ) {
 423                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 424         }
 425
 426         if ( bd->be_syncinfo ) {
 427                 syncinfo_free( bd->be_syncinfo, 1 );
 428         }
 429
 430         backend_stopdown_one( bd );
 431
 432         ber_bvarray_free( bd->be_suffix );
 433         ber_bvarray_free( bd->be_nsuffix );
 434         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 435                 free( bd->be_rootdn.bv_val );
 436         }
 437         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 438                 free( bd->be_rootndn.bv_val );
 439         }
 440         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 441                 free( bd->be_rootpw.bv_val );
 442         }
 443         acl_destroy( bd->be_acl, frontendDB->be_acl );
 444         limits_destroy( bd->be_limits );
 445         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 446                 ch_free( bd->be_update_ndn.bv_val );
 447         }
 448         if ( bd->be_update_refs ) {
 449                 ber_bvarray_free( bd->be_update_refs );
 450         }
 451
 452         if ( dynamic ) {
 453                 free( bd );
 454         }
 455 }
 456
 457 int backend_destroy(void)
 458 {
 459         BackendDB *bd;
 460         BackendInfo *bi;
 461
 462         /* destroy each backend database */
 463         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 464                 backend_destroy_one( bd, 1 );
 465         }
 466
 467         /* destroy each backend type */
 468         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 469                 if( bi->bi_destroy ) {
 470                         bi->bi_destroy( bi );
 471                 }
 472         }
 473
 474         nBackendInfo = 0;
 475         LDAP_STAILQ_INIT(&backendInfo);
 476
 477         /* destroy frontend database */
 478         bd = frontendDB;
 479         if ( bd ) {
 480                 if ( bd->bd_info->bi_db_destroy ) {
 481                         bd->bd_info->bi_db_destroy( bd, NULL );
 482                 }
 483                 ber_bvarray_free( bd->be_suffix );
 484                 ber_bvarray_free( bd->be_nsuffix );
 485                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 486                         free( bd->be_rootdn.bv_val );
 487                 }
 488                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 489                         free( bd->be_rootndn.bv_val );
 490                 }
 491                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 492                         free( bd->be_rootpw.bv_val );
 493                 }
 494                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 495         }
 496
 497         return 0;
 498 }
 499
 500 BackendInfo* backend_info(const char *type)
 501 {
 502         BackendInfo *bi;
 503
 504         /* search for the backend type */
 505         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 506                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 507                         return bi;
 508                 }
 509         }
 510
 511         return NULL;
 512 }
 513
 514 void
 515 backend_db_insert(
 516         BackendDB *be,
 517         int idx
 518 )
 519 {
 520         /* If idx < 0, just add to end of list */
 521         if ( idx < 0 ) {
 522                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 523         } else if ( idx == 0 ) {
 524                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 525         } else {
 526                 int i;
 527                 BackendDB *b2;
 528
 529                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 530                 idx--;
 531                 for (i=0; i<idx; i++) {
 532                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 533                 }
 534                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 535         }
 536 }
 537
 538 void
 539 backend_db_move(
 540         BackendDB *be,
 541         int idx
 542 )
 543 {
 544         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 545         backend_db_insert(be, idx);
 546 }
 547
 548 BackendDB *
 549 backend_db_init(
 550     const char  *type,
 551         BackendDB *b0,
 552         int idx,
 553         ConfigReply *cr)
 554 {
 555         BackendInfo *bi = backend_info(type);
 556         BackendDB *be = b0;
 557         int     rc = 0;
 558
 559         if( bi == NULL ) {
 560                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 561                 return NULL;
 562         }
 563
 564         /* If be is provided, treat it as private. Otherwise allocate
 565          * one and add it to the global list.
 566          */
 567         if ( !be ) {
 568                 be = ch_calloc( 1, sizeof(Backend) );
 569                 /* Just append */
 570                 if ( idx >= nbackends )
 571                         idx = -1;
 572                 nbackends++;
 573                 backend_db_insert( be, idx );
 574         }
 575
 576         be->bd_info = bi;
 577
 578         be->be_def_limit = frontendDB->be_def_limit;
 579         be->be_dfltaccess = frontendDB->be_dfltaccess;
 580
 581         be->be_restrictops = frontendDB->be_restrictops;
 582         be->be_requires = frontendDB->be_requires;
 583         be->be_ssf_set = frontendDB->be_ssf_set;
 584
 585         be->be_pcl_mutexp = &be->be_pcl_mutex;
 586         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 587
 588         /* assign a default depth limit for alias deref */
 589         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 590
 591         if ( bi->bi_db_init ) {
 592                 rc = bi->bi_db_init( be, cr );
 593         }
 594
 595         if ( rc != 0 ) {
 596                 fprintf( stderr, "database init failed (%s)\n", type );
 597                 /* If we created and linked this be, remove it and free it */
 598                 if ( !b0 ) {
 599                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 600                         ch_free( be );
 601                         be = NULL;
 602                         nbackends--;
 603                 }
 604         } else {
 605                 bi->bi_nDB++;
 606         }
 607         return( be );
 608 }
 609
 610 void
 611 be_db_close( void )
 612 {
 613         BackendDB *be;
 614
 615         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 616                 if ( be->bd_info->bi_db_close ) {
 617                         be->bd_info->bi_db_close( be, NULL );
 618                 }
 619         }
 620
 621         if ( frontendDB->bd_info->bi_db_close ) {
 622                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 623         }
 624
 625 }
 626
 627 Backend *
 628 select_backend(
 629         struct berval * dn,
 630         int noSubs )
 631 {
 632         int             j;
 633         ber_len_t       len, dnlen = dn->bv_len;
 634         Backend         *be;
 635
 636         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 637                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 638                         continue;
 639                 }
 640
 641                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 642                 {
 643                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 644                         {
 645                                 continue;
 646                         }
 647
 648                         len = be->be_nsuffix[j].bv_len;
 649
 650                         if ( len > dnlen ) {
 651                                 /* suffix is longer than DN */
 652                                 continue;
 653                         }
 654
 655                         /*
 656                          * input DN is normalized, so the separator check
 657                          * need not look at escaping
 658                          */
 659                         if ( len && len < dnlen &&
 660                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 661                         {
 662                                 continue;
 663                         }
 664
 665                         if ( strcmp( be->be_nsuffix[j].bv_val,
 666                                 &dn->bv_val[dnlen-len] ) == 0 )
 667                         {
 668                                 return be;
 669                         }
 670                 }
 671         }
 672
 673         return be;
 674 }
 675
 676 int
 677 be_issuffix(
 678     Backend *be,
 679     struct berval *bvsuffix )
 680 {
 681         int     i;
 682
 683         if ( be->be_nsuffix == NULL ) {
 684                 return 0;
 685         }
 686
 687         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 688                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 689                         return 1;
 690                 }
 691         }
 692
 693         return 0;
 694 }
 695
 696 int
 697 be_issubordinate(
 698     Backend *be,
 699     struct berval *bvsubordinate )
 700 {
 701         int     i;
 702
 703         if ( be->be_nsuffix == NULL ) {
 704                 return 0;
 705         }
 706
 707         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 708                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 709                         return 1;
 710                 }
 711         }
 712
 713         return 0;
 714 }
 715
 716 int
 717 be_isroot_dn( Backend *be, struct berval *ndn )
 718 {
 719         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 720                 return 0;
 721         }
 722
 723         return dn_match( &be->be_rootndn, ndn );
 724 }
 725
 726 int
 727 be_slurp_update( Operation *op )
 728 {
 729         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 730                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 731 }
 732
 733 int
 734 be_shadow_update( Operation *op )
 735 {
 736         /* This assumes that all internal ops (connid == -1) on a syncrepl
 737          * database are syncrepl operations.
 738          */
 739         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 740                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 741 }
 742
 743 int
 744 be_isupdate_dn( Backend *be, struct berval *ndn )
 745 {
 746         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 747                 return 0;
 748         }
 749
 750         return dn_match( &be->be_update_ndn, ndn );
 751 }
 752
 753 struct berval *
 754 be_root_dn( Backend *be )
 755 {
 756         return &be->be_rootdn;
 757 }
 758
 759 int
 760 be_isroot( Operation *op )
 761 {
 762         return be_isroot_dn( op->o_bd, &op->o_ndn );
 763 }
 764
 765 int
 766 be_isroot_pw( Operation *op )
 767 {
 768         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 769 }
 770
 771 /*
 772  * checks if binding as rootdn
 773  *
 774  * return value:
 775  *      SLAP_CB_CONTINUE                if not the rootdn
 776  *      LDAP_SUCCESS                    if rootdn & rootpw
 777  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 778  *
 779  * if rs != NULL
 780  *      if LDAP_SUCCESS, op->orb_edn is set
 781  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 782  */
 783 int
 784 be_rootdn_bind( Operation *op, SlapReply *rs )
 785 {
 786         int             rc;
 787
 788         assert( op->o_tag == LDAP_REQ_BIND );
 789         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 790
 791         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 792                 return SLAP_CB_CONTINUE;
 793         }
 794
 795         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 796                 rc = LDAP_INVALID_CREDENTIALS;
 797                 if ( rs ) {
 798                         goto send_result;
 799                 }
 800
 801                 return rc;
 802         }
 803
 804 #ifdef SLAPD_SPASSWD
 805         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 806                 op->o_conn->c_sasl_authctx, NULL );
 807 #endif
 808
 809         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 810
 811 #ifdef SLAPD_SPASSWD
 812         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 813 #endif
 814
 815         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 816         if ( rs ) {
 817 send_result:;
 818                 rs->sr_err = rc;
 819
 820                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 821                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 822                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 823
 824                 if ( rc == LDAP_SUCCESS ) {
 825                         /* Set to the pretty rootdn */
 826                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 827
 828                 } else {
 829                         send_ldap_result( op, rs );
 830                 }
 831         }
 832
 833         return rc;
 834 }
 835
 836 int
 837 be_entry_release_rw(
 838         Operation *op,
 839         Entry *e,
 840         int rw )
 841 {
 842         if ( op->o_bd->be_release ) {
 843                 /* free and release entry from backend */
 844                 return op->o_bd->be_release( op, e, rw );
 845         } else {
 846                 /* free entry */
 847                 entry_free( e );
 848                 return 0;
 849         }
 850 }
 851
 852 int
 853 backend_unbind( Operation *op, SlapReply *rs )
 854 {
 855         BackendDB *be;
 856
 857         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 858                 if ( be->be_unbind ) {
 859                         op->o_bd = be;
 860                         be->be_unbind( op, rs );
 861                 }
 862         }
 863
 864         return 0;
 865 }
 866
 867 int
 868 backend_connection_init(
 869         Connection   *conn )
 870 {
 871         BackendDB *be;
 872
 873         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 874                 if ( be->be_connection_init ) {
 875                         be->be_connection_init( be, conn );
 876                 }
 877         }
 878
 879         return 0;
 880 }
 881
 882 int
 883 backend_connection_destroy(
 884         Connection   *conn )
 885 {
 886         BackendDB *be;
 887
 888         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 889                 if ( be->be_connection_destroy ) {
 890                         be->be_connection_destroy( be, conn);
 891                 }
 892         }
 893
 894         return 0;
 895 }
 896
 897 int
 898 backend_check_controls(
 899         Operation *op,
 900         SlapReply *rs )
 901 {
 902         LDAPControl **ctrls = op->o_ctrls;
 903         rs->sr_err = LDAP_SUCCESS;
 904
 905         if( ctrls ) {
 906                 for( ; *ctrls != NULL ; ctrls++ ) {
 907                         int cid;
 908
 909                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 910                         case LDAP_CONTROL_NOT_FOUND:
 911                                 /* unrecognized control */
 912                                 if ( (*ctrls)->ldctl_iscritical ) {
 913                                         /* should not be reachable */
 914                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 915                                                 "unrecognized critical control: %s\n",
 916                                                 (*ctrls)->ldctl_oid, 0, 0 );
 917                                         assert( 0 );
 918                                 } else {
 919                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 920                                                 "unrecognized non-critical control: %s\n",
 921                                                 (*ctrls)->ldctl_oid, 0, 0 );
 922                                 }
 923                                 break;
 924
 925                         case LDAP_COMPARE_FALSE:
 926                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 927                                         /* RFC 4511 allows unavailableCriticalExtension to be
 928                                          * returned when the server is unwilling to perform
 929                                          * an operation extended by a recognized critical
 930                                          * control.
 931                                          */
 932                                         rs->sr_text = "critical control unavailable in context";
 933                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 934                                         goto done;
 935                                 }
 936                                 break;
 937
 938                         case LDAP_COMPARE_TRUE:
 939                                 break;
 940
 941                         default:
 942                                 /* unreachable */
 943                                 Debug( LDAP_DEBUG_ANY,
 944                                         "backend_check_controls: unable to check control: %s\n",
 945                                         (*ctrls)->ldctl_oid, 0, 0 );
 946                                 assert( 0 );
 947
 948                                 rs->sr_text = "unable to check control";
 949                                 rs->sr_err = LDAP_OTHER;
 950                                 goto done;
 951                         }
 952                 }
 953         }
 954
 955 #if 0 /* temporarily removed */
 956         /* check should be generalized */
 957         if( get_relax(op) && !be_isroot(op)) {
 958                 rs->sr_text = "requires manager authorization";
 959                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 960         }
 961 #endif
 962
 963 done:;
 964         return rs->sr_err;
 965 }
 966
 967 int
 968 backend_check_restrictions(
 969         Operation *op,
 970         SlapReply *rs,
 971         struct berval *opdata )
 972 {
 973         slap_mask_t restrictops;
 974         slap_mask_t requires;
 975         slap_mask_t opflag;
 976         slap_mask_t exopflag = 0;
 977         slap_ssf_set_t *ssf;
 978         int updateop = 0;
 979         int starttls = 0;
 980         int session = 0;
 981
 982         if ( op->o_bd ) {
 983                 int     rc = SLAP_CB_CONTINUE;
 984
 985                 if ( op->o_bd->be_chk_controls ) {
 986                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 987                 }
 988
 989                 if ( rc == SLAP_CB_CONTINUE ) {
 990                         rc = backend_check_controls( op, rs );
 991                 }
 992
 993                 if ( rc != LDAP_SUCCESS ) {
 994                         return rs->sr_err;
 995                 }
 996
 997                 restrictops = op->o_bd->be_restrictops;
 998                 requires = op->o_bd->be_requires;
 999                 ssf = &op->o_bd->be_ssf_set;
1000
1001         } else {
1002                 restrictops = frontendDB->be_restrictops;
1003                 requires = frontendDB->be_requires;
1004                 ssf = &frontendDB->be_ssf_set;
1005         }
1006
1007         switch( op->o_tag ) {
1008         case LDAP_REQ_ADD:
1009                 opflag = SLAP_RESTRICT_OP_ADD;
1010                 updateop++;
1011                 break;
1012         case LDAP_REQ_BIND:
1013                 opflag = SLAP_RESTRICT_OP_BIND;
1014                 session++;
1015                 break;
1016         case LDAP_REQ_COMPARE:
1017                 opflag = SLAP_RESTRICT_OP_COMPARE;
1018                 break;
1019         case LDAP_REQ_DELETE:
1020                 updateop++;
1021                 opflag = SLAP_RESTRICT_OP_DELETE;
1022                 break;
1023         case LDAP_REQ_EXTENDED:
1024                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1025
1026                 if( !opdata ) {
1027                         /* treat unspecified as a modify */
1028                         opflag = SLAP_RESTRICT_OP_MODIFY;
1029                         updateop++;
1030                         break;
1031                 }
1032
1033                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1034                         session++;
1035                         starttls++;
1036                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1037                         break;
1038                 }
1039
1040                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1041                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1042                         break;
1043                 }
1044
1045                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1046                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1047                         break;
1048                 }
1049
1050                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1051                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1052                         updateop++;
1053                         break;
1054                 }
1055
1056                 /* treat everything else as a modify */
1057                 opflag = SLAP_RESTRICT_OP_MODIFY;
1058                 updateop++;
1059                 break;
1060
1061         case LDAP_REQ_MODIFY:
1062                 updateop++;
1063                 opflag = SLAP_RESTRICT_OP_MODIFY;
1064                 break;
1065         case LDAP_REQ_RENAME:
1066                 updateop++;
1067                 opflag = SLAP_RESTRICT_OP_RENAME;
1068                 break;
1069         case LDAP_REQ_SEARCH:
1070                 opflag = SLAP_RESTRICT_OP_SEARCH;
1071                 break;
1072         case LDAP_REQ_UNBIND:
1073                 session++;
1074                 opflag = 0;
1075                 break;
1076         default:
1077                 rs->sr_text = "restrict operations internal error";
1078                 rs->sr_err = LDAP_OTHER;
1079                 return rs->sr_err;
1080         }
1081
1082         if ( !starttls ) {
1083                 /* these checks don't apply to StartTLS */
1084
1085                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1086                 if( op->o_transport_ssf < ssf->sss_transport ) {
1087                         rs->sr_text = op->o_transport_ssf
1088                                 ? "stronger transport confidentiality required"
1089                                 : "transport confidentiality required";
1090                         return rs->sr_err;
1091                 }
1092
1093                 if( op->o_tls_ssf < ssf->sss_tls ) {
1094                         rs->sr_text = op->o_tls_ssf
1095                                 ? "stronger TLS confidentiality required"
1096                                 : "TLS confidentiality required";
1097                         return rs->sr_err;
1098                 }
1099
1100
1101                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1102                         /* simple bind specific check */
1103                         if( op->o_ssf < ssf->sss_simple_bind ) {
1104                                 rs->sr_text = op->o_ssf
1105                                         ? "stronger confidentiality required"
1106                                         : "confidentiality required";
1107                                 return rs->sr_err;
1108                         }
1109                 }
1110
1111                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1112                         /* these checks don't apply to SASL bind */
1113
1114                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1115                                 rs->sr_text = op->o_sasl_ssf
1116                                         ? "stronger SASL confidentiality required"
1117                                         : "SASL confidentiality required";
1118                                 return rs->sr_err;
1119                         }
1120
1121                         if( op->o_ssf < ssf->sss_ssf ) {
1122                                 rs->sr_text = op->o_ssf
1123                                         ? "stronger confidentiality required"
1124                                         : "confidentiality required";
1125                                 return rs->sr_err;
1126                         }
1127                 }
1128
1129                 if( updateop ) {
1130                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1131                                 rs->sr_text = op->o_transport_ssf
1132                                         ? "stronger transport confidentiality required for update"
1133                                         : "transport confidentiality required for update";
1134                                 return rs->sr_err;
1135                         }
1136
1137                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1138                                 rs->sr_text = op->o_tls_ssf
1139                                         ? "stronger TLS confidentiality required for update"
1140                                         : "TLS confidentiality required for update";
1141                                 return rs->sr_err;
1142                         }
1143
1144                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1145                                 rs->sr_text = op->o_sasl_ssf
1146                                         ? "stronger SASL confidentiality required for update"
1147                                         : "SASL confidentiality required for update";
1148                                 return rs->sr_err;
1149                         }
1150
1151                         if( op->o_ssf < ssf->sss_update_ssf ) {
1152                                 rs->sr_text = op->o_ssf
1153                                         ? "stronger confidentiality required for update"
1154                                         : "confidentiality required for update";
1155                                 return rs->sr_err;
1156                         }
1157
1158                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1159                                 BER_BVISEMPTY( &op->o_ndn ) )
1160                         {
1161                                 rs->sr_text = "modifications require authentication";
1162                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1163                                 return rs->sr_err;
1164                         }
1165
1166 #ifdef SLAP_X_LISTENER_MOD
1167                         if ( op->o_conn->c_listener &&
1168                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1169                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1170                         {
1171                                 /* no "w" mode means readonly */
1172                                 rs->sr_text = "modifications not allowed on this listener";
1173                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1174                                 return rs->sr_err;
1175                         }
1176 #endif /* SLAP_X_LISTENER_MOD */
1177                 }
1178         }
1179
1180         if ( !session ) {
1181                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1182
1183                 if( requires & SLAP_REQUIRE_STRONG ) {
1184                         /* should check mechanism */
1185                         if( ( op->o_transport_ssf < ssf->sss_transport
1186                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1187                                 || BER_BVISEMPTY( &op->o_dn ) )
1188                         {
1189                                 rs->sr_text = "strong(er) authentication required";
1190                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1191                                 return rs->sr_err;
1192                         }
1193                 }
1194
1195                 if( requires & SLAP_REQUIRE_SASL ) {
1196                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1197                                 rs->sr_text = "SASL authentication required";
1198                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1199                                 return rs->sr_err;
1200                         }
1201                 }
1202
1203                 if( requires & SLAP_REQUIRE_AUTHC ) {
1204                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1205                                 rs->sr_text = "authentication required";
1206                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1207                                 return rs->sr_err;
1208                         }
1209                 }
1210
1211                 if( requires & SLAP_REQUIRE_BIND ) {
1212                         int version;
1213                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1214                         version = op->o_conn->c_protocol;
1215                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1216
1217                         if( !version ) {
1218                                 /* no bind has occurred */
1219                                 rs->sr_text = "BIND required";
1220                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1221                                 return rs->sr_err;
1222                         }
1223                 }
1224
1225                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1226                         if( op->o_protocol < LDAP_VERSION3 ) {
1227                                 /* no bind has occurred */
1228                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1229                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1230                                 return rs->sr_err;
1231                         }
1232                 }
1233
1234 #ifdef SLAP_X_LISTENER_MOD
1235                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1236                         if ( op->o_conn->c_listener &&
1237                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1238                 {
1239                                 /* no "x" mode means bind required */
1240                                 rs->sr_text = "bind required on this listener";
1241                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1242                                 return rs->sr_err;
1243                         }
1244                 }
1245
1246                 if ( !starttls && !updateop ) {
1247                         if ( op->o_conn->c_listener &&
1248                                 !( op->o_conn->c_listener->sl_perms &
1249                                         ( !BER_BVISEMPTY( &op->o_dn )
1250                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1251                         {
1252                                 /* no "r" mode means no read */
1253                                 rs->sr_text = "read not allowed on this listener";
1254                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1255                                 return rs->sr_err;
1256                         }
1257                 }
1258 #endif /* SLAP_X_LISTENER_MOD */
1259
1260         }
1261
1262         if( ( restrictops & opflag )
1263                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1264                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1265                         rs->sr_text = "read operations restricted";
1266                 } else if ( restrictops & exopflag ) {
1267                         rs->sr_text = "extended operation restricted";
1268                 } else {
1269                         rs->sr_text = "operation restricted";
1270                 }
1271                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1272                 return rs->sr_err;
1273         }
1274
1275         rs->sr_err = LDAP_SUCCESS;
1276         return rs->sr_err;
1277 }
1278
1279 int backend_check_referrals( Operation *op, SlapReply *rs )
1280 {
1281         rs->sr_err = LDAP_SUCCESS;
1282
1283         if( op->o_bd->be_chk_referrals ) {
1284                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1285
1286                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1287                         send_ldap_result( op, rs );
1288                 }
1289         }
1290
1291         return rs->sr_err;
1292 }
1293
1294 int
1295 be_entry_get_rw(
1296         Operation *op,
1297         struct berval *ndn,
1298         ObjectClass *oc,
1299         AttributeDescription *at,
1300         int rw,
1301         Entry **e )
1302 {
1303         *e = NULL;
1304
1305         if ( op->o_bd == NULL ) {
1306                 return LDAP_NO_SUCH_OBJECT;
1307         }
1308
1309         if ( op->o_bd->be_fetch ) {
1310                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1311         }
1312
1313         return LDAP_UNWILLING_TO_PERFORM;
1314 }
1315
1316 int
1317 fe_acl_group(
1318         Operation *op,
1319         Entry   *target,
1320         struct berval *gr_ndn,
1321         struct berval *op_ndn,
1322         ObjectClass *group_oc,
1323         AttributeDescription *group_at )
1324 {
1325         Entry *e;
1326         void *o_priv = op->o_private, *e_priv = NULL;
1327         Attribute *a;
1328         int rc;
1329         GroupAssertion *g;
1330         Backend *be = op->o_bd;
1331
1332         op->o_bd = select_backend( gr_ndn, 0 );
1333
1334         for ( g = op->o_groups; g; g = g->ga_next ) {
1335                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1336                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1337                 {
1338                         continue;
1339                 }
1340                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1341                         break;
1342                 }
1343         }
1344
1345         if ( g ) {
1346                 rc = g->ga_res;
1347                 goto done;
1348         }
1349
1350         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1351                 e = target;
1352                 rc = 0;
1353
1354         } else {
1355                 op->o_private = NULL;
1356                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1357                 e_priv = op->o_private;
1358                 op->o_private = o_priv;
1359         }
1360
1361         if ( e ) {
1362                 a = attr_find( e->e_attrs, group_at );
1363                 if ( a ) {
1364                         /* If the attribute is a subtype of labeledURI,
1365                          * treat this as a dynamic group ala groupOfURLs
1366                          */
1367                         if ( is_at_subtype( group_at->ad_type,
1368                                 slap_schema.si_ad_labeledURI->ad_type ) )
1369                         {
1370                                 int i;
1371                                 LDAPURLDesc *ludp;
1372                                 struct berval bv, nbase;
1373                                 Filter *filter;
1374                                 Entry *user = NULL;
1375                                 void *user_priv = NULL;
1376                                 Backend *b2 = op->o_bd;
1377
1378                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1379                                         user = target;
1380                                 }
1381
1382                                 rc = LDAP_COMPARE_FALSE;
1383                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1384                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1385                                                 LDAP_URL_SUCCESS )
1386                                         {
1387                                                 continue;
1388                                         }
1389
1390                                         BER_BVZERO( &nbase );
1391
1392                                         /* host, attrs and extensions parts must be empty */
1393                                         if ( ( ludp->lud_host && *ludp->lud_host )
1394                                                 || ludp->lud_attrs
1395                                                 || ludp->lud_exts )
1396                                         {
1397                                                 goto loopit;
1398                                         }
1399
1400                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1401                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1402                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1403                                         {
1404                                                 goto loopit;
1405                                         }
1406
1407                                         switch ( ludp->lud_scope ) {
1408                                         case LDAP_SCOPE_BASE:
1409                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1410                                                         goto loopit;
1411                                                 }
1412                                                 break;
1413                                         case LDAP_SCOPE_ONELEVEL:
1414                                                 dnParent( op_ndn, &bv );
1415                                                 if ( !dn_match( &nbase, &bv ) ) {
1416                                                         goto loopit;
1417                                                 }
1418                                                 break;
1419                                         case LDAP_SCOPE_SUBTREE:
1420                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1421                                                         goto loopit;
1422                                                 }
1423                                                 break;
1424                                         case LDAP_SCOPE_SUBORDINATE:
1425                                                 if ( dn_match( &nbase, op_ndn ) ||
1426                                                         !dnIsSuffix( op_ndn, &nbase ) )
1427                                                 {
1428                                                         goto loopit;
1429                                                 }
1430                                         }
1431
1432                                         /* NOTE: this could be NULL
1433                                          * if no filter is provided,
1434                                          * or if filter parsing fails.
1435                                          * In the latter case,
1436                                          * we should give up. */
1437                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1438                                                 filter = str2filter_x( op, ludp->lud_filter );
1439                                                 if ( filter == NULL ) {
1440                                                         /* give up... */
1441                                                         rc = LDAP_OTHER;
1442                                                         goto loopit;
1443                                                 }
1444
1445                                                 /* only get user if required
1446                                                  * and not available yet */
1447                                                 if ( user == NULL ) {
1448                                                         int rc2;
1449
1450                                                         op->o_bd = select_backend( op_ndn, 0 );
1451                                                         op->o_private = NULL;
1452                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1453                                                         user_priv = op->o_private;
1454                                                         op->o_private = o_priv;
1455                                                         if ( rc2 != 0 ) {
1456                                                                 /* give up... */
1457                                                                 rc = LDAP_OTHER;
1458                                                                 goto loopit;
1459                                                         }
1460                                                 }
1461
1462                                                 if ( test_filter( NULL, user, filter ) ==
1463                                                         LDAP_COMPARE_TRUE )
1464                                                 {
1465                                                         rc = 0;
1466                                                 }
1467                                                 filter_free_x( op, filter );
1468                                         }
1469 loopit:
1470                                         ldap_free_urldesc( ludp );
1471                                         if ( !BER_BVISNULL( &nbase ) ) {
1472                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1473                                         }
1474                                         if ( rc != LDAP_COMPARE_FALSE ) {
1475                                                 break;
1476                                         }
1477                                 }
1478
1479                                 if ( user != NULL && user != target ) {
1480                                         op->o_private = user_priv;
1481                                         be_entry_release_r( op, user );
1482                                         op->o_private = o_priv;
1483                                 }
1484                                 op->o_bd = b2;
1485
1486                         } else {
1487                                 rc = value_find_ex( group_at,
1488                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1489                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1490                                         a->a_nvals, op_ndn, op->o_tmpmemctx );
1491                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1492                                         rc = LDAP_COMPARE_FALSE;
1493                                 }
1494                         }
1495
1496                 } else {
1497                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1498                 }
1499
1500                 if ( e != target ) {
1501                         op->o_private = e_priv;
1502                         be_entry_release_r( op, e );
1503                         op->o_private = o_priv;
1504                 }
1505
1506         } else {
1507                 rc = LDAP_NO_SUCH_OBJECT;
1508         }
1509
1510         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1511                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1512                         op->o_tmpmemctx );
1513                 g->ga_be = op->o_bd;
1514                 g->ga_oc = group_oc;
1515                 g->ga_at = group_at;
1516                 g->ga_res = rc;
1517                 g->ga_len = gr_ndn->bv_len;
1518                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1519                 g->ga_next = op->o_groups;
1520                 op->o_groups = g;
1521         }
1522
1523 done:
1524         op->o_bd = be;
1525         return rc;
1526 }
1527
1528 int
1529 backend_group(
1530         Operation *op,
1531         Entry   *target,
1532         struct berval *gr_ndn,
1533         struct berval *op_ndn,
1534         ObjectClass *group_oc,
1535         AttributeDescription *group_at )
1536 {
1537         int                     rc;
1538         BackendDB               *be_orig;
1539
1540         if ( op->o_abandon ) {
1541                 return SLAPD_ABANDON;
1542         }
1543
1544         be_orig = op->o_bd;
1545         op->o_bd = frontendDB;
1546         rc = frontendDB->be_group( op, target, gr_ndn,
1547                 op_ndn, group_oc, group_at );
1548         op->o_bd = be_orig;
1549
1550         return rc;
1551 }
1552
1553 int
1554 fe_acl_attribute(
1555         Operation *op,
1556         Entry   *target,
1557         struct berval   *edn,
1558         AttributeDescription *entry_at,
1559         BerVarray *vals,
1560         slap_access_t access )
1561 {
1562         Entry                   *e = NULL;
1563         void                    *o_priv = op->o_private, *e_priv = NULL;
1564         Attribute               *a = NULL;
1565         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1566         AccessControlState      acl_state = ACL_STATE_INIT;
1567         Backend                 *be = op->o_bd;
1568
1569         op->o_bd = select_backend( edn, 0 );
1570
1571         if ( target && dn_match( &target->e_nname, edn ) ) {
1572                 e = target;
1573
1574         } else {
1575                 op->o_private = NULL;
1576                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1577                 e_priv = op->o_private;
1578                 op->o_private = o_priv;
1579         }
1580
1581         if ( e ) {
1582                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1583                         assert( vals == NULL );
1584
1585                         rc = LDAP_SUCCESS;
1586                         if ( op->o_conn && access > ACL_NONE &&
1587                                 access_allowed( op, e, entry_at, NULL,
1588                                                 access, &acl_state ) == 0 )
1589                         {
1590                                 rc = LDAP_INSUFFICIENT_ACCESS;
1591                         }
1592                         goto freeit;
1593                 }
1594
1595                 a = attr_find( e->e_attrs, entry_at );
1596                 if ( a == NULL ) {
1597                         SlapReply       rs = { 0 };
1598                         AttributeName   anlist[ 2 ];
1599
1600                         anlist[ 0 ].an_name = entry_at->ad_cname;
1601                         anlist[ 0 ].an_desc = entry_at;
1602                         BER_BVZERO( &anlist[ 1 ].an_name );
1603                         rs.sr_attrs = anlist;
1604
1605                         /* NOTE: backend_operational() is also called
1606                          * when returning results, so it's supposed
1607                          * to do no harm to entries */
1608                         rs.sr_entry = e;
1609                         rc = backend_operational( op, &rs );
1610                         rs.sr_entry = NULL;
1611
1612                         if ( rc == LDAP_SUCCESS ) {
1613                                 if ( rs.sr_operational_attrs ) {
1614                                         freeattr = 1;
1615                                         a = rs.sr_operational_attrs;
1616
1617                                 } else {
1618                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1619                                 }
1620                         }
1621                 }
1622
1623                 if ( a ) {
1624                         BerVarray v;
1625
1626                         if ( op->o_conn && access > ACL_NONE &&
1627                                 access_allowed( op, e, entry_at, NULL,
1628                                                 access, &acl_state ) == 0 )
1629                         {
1630                                 rc = LDAP_INSUFFICIENT_ACCESS;
1631                                 goto freeit;
1632                         }
1633
1634                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1635                                 ;
1636
1637                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1638                                 op->o_tmpmemctx );
1639                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1640                         {
1641                                 if ( op->o_conn && access > ACL_NONE &&
1642                                         access_allowed( op, e, entry_at,
1643                                                         &a->a_nvals[i],
1644                                                         access,
1645                                                         &acl_state ) == 0 )
1646                                 {
1647                                         continue;
1648                                 }
1649                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1650                                                 op->o_tmpmemctx );
1651                                 if ( !BER_BVISNULL( &v[j] ) ) {
1652                                         j++;
1653                                 }
1654                         }
1655                         if ( j == 0 ) {
1656                                 op->o_tmpfree( v, op->o_tmpmemctx );
1657                                 *vals = NULL;
1658                                 rc = LDAP_INSUFFICIENT_ACCESS;
1659
1660                         } else {
1661                                 BER_BVZERO( &v[j] );
1662                                 *vals = v;
1663                                 rc = LDAP_SUCCESS;
1664                         }
1665                 }
1666 freeit:         if ( e != target ) {
1667                         op->o_private = e_priv;
1668                         be_entry_release_r( op, e );
1669                         op->o_private = o_priv;
1670                 }
1671                 if ( freeattr ) {
1672                         attr_free( a );
1673                 }
1674         }
1675
1676         op->o_bd = be;
1677         return rc;
1678 }
1679
1680 int
1681 backend_attribute(
1682         Operation *op,
1683         Entry   *target,
1684         struct berval   *edn,
1685         AttributeDescription *entry_at,
1686         BerVarray *vals,
1687         slap_access_t access )
1688 {
1689         int                     rc;
1690         BackendDB               *be_orig;
1691
1692         be_orig = op->o_bd;
1693         op->o_bd = frontendDB;
1694         rc = frontendDB->be_attribute( op, target, edn,
1695                 entry_at, vals, access );
1696         op->o_bd = be_orig;
1697
1698         return rc;
1699 }
1700
1701 int
1702 backend_access(
1703         Operation               *op,
1704         Entry                   *target,
1705         struct berval           *edn,
1706         AttributeDescription    *entry_at,
1707         struct berval           *nval,
1708         slap_access_t           access,
1709         slap_mask_t             *mask )
1710 {
1711         Entry           *e = NULL;
1712         void            *o_priv = op->o_private, *e_priv = NULL;
1713         int             rc = LDAP_INSUFFICIENT_ACCESS;
1714         Backend         *be = op->o_bd;
1715
1716         /* pedantic */
1717         assert( op != NULL );
1718         assert( op->o_conn != NULL );
1719         assert( edn != NULL );
1720         assert( access > ACL_NONE );
1721
1722         op->o_bd = select_backend( edn, 0 );
1723
1724         if ( target && dn_match( &target->e_nname, edn ) ) {
1725                 e = target;
1726
1727         } else {
1728                 op->o_private = NULL;
1729                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1730                 e_priv = op->o_private;
1731                 op->o_private = o_priv;
1732         }
1733
1734         if ( e ) {
1735                 Attribute       *a = NULL;
1736                 int             freeattr = 0;
1737
1738                 if ( entry_at == NULL ) {
1739                         entry_at = slap_schema.si_ad_entry;
1740                 }
1741
1742                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1743                 {
1744                         if ( access_allowed_mask( op, e, entry_at,
1745                                         NULL, access, NULL, mask ) == 0 )
1746                         {
1747                                 rc = LDAP_INSUFFICIENT_ACCESS;
1748
1749                         } else {
1750                                 rc = LDAP_SUCCESS;
1751                         }
1752
1753                 } else {
1754                         a = attr_find( e->e_attrs, entry_at );
1755                         if ( a == NULL ) {
1756                                 SlapReply       rs = { 0 };
1757                                 AttributeName   anlist[ 2 ];
1758
1759                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1760                                 anlist[ 0 ].an_desc = entry_at;
1761                                 BER_BVZERO( &anlist[ 1 ].an_name );
1762                                 rs.sr_attrs = anlist;
1763
1764                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1765
1766                                 /* NOTE: backend_operational() is also called
1767                                  * when returning results, so it's supposed
1768                                  * to do no harm to entries */
1769                                 rs.sr_entry = e;
1770                                 rc = backend_operational( op, &rs );
1771                                 rs.sr_entry = NULL;
1772
1773                                 if ( rc == LDAP_SUCCESS ) {
1774                                         if ( rs.sr_operational_attrs ) {
1775                                                 freeattr = 1;
1776                                                 a = rs.sr_operational_attrs;
1777
1778                                         } else {
1779                                                 rc = LDAP_NO_SUCH_OBJECT;
1780                                         }
1781                                 }
1782                         }
1783
1784                         if ( a ) {
1785                                 if ( access_allowed_mask( op, e, entry_at,
1786                                                 nval, access, NULL, mask ) == 0 )
1787                                 {
1788                                         rc = LDAP_INSUFFICIENT_ACCESS;
1789                                         goto freeit;
1790                                 }
1791                                 rc = LDAP_SUCCESS;
1792                         }
1793                 }
1794 freeit:         if ( e != target ) {
1795                         op->o_private = e_priv;
1796                         be_entry_release_r( op, e );
1797                         op->o_private = o_priv;
1798                 }
1799                 if ( freeattr ) {
1800                         attr_free( a );
1801                 }
1802         }
1803
1804         op->o_bd = be;
1805         return rc;
1806 }
1807
1808 int
1809 fe_aux_operational(
1810         Operation *op,
1811         SlapReply *rs )
1812 {
1813         Attribute               **ap;
1814         int                     rc = 0;
1815
1816         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1817                 /* just count them */ ;
1818
1819         /*
1820          * If operational attributes (allegedly) are required,
1821          * and the backend supports specific operational attributes,
1822          * add them to the attribute list
1823          */
1824         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1825                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1826                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1827         {
1828                 *ap = slap_operational_entryDN( rs->sr_entry );
1829                 ap = &(*ap)->a_next;
1830         }
1831
1832         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1833                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1834                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1835         {
1836                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1837                 ap = &(*ap)->a_next;
1838         }
1839
1840         if ( op->o_bd != NULL ) {
1841                 BackendDB               *be_orig = op->o_bd;
1842
1843                 /* Let the overlays have a chance at this */
1844                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1845                 if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1846                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1847                         op->o_bd->be_operational != NULL )
1848                 {
1849                         rc = op->o_bd->be_operational( op, rs );
1850                 }
1851                 op->o_bd = be_orig;
1852         }
1853
1854         return rc;
1855 }
1856
1857 int backend_operational( Operation *op, SlapReply *rs )
1858 {
1859         int rc;
1860         BackendDB *be_orig;
1861
1862         /* Moved this into the frontend so global overlays are called */
1863
1864         be_orig = op->o_bd;
1865         op->o_bd = frontendDB;
1866         rc = frontendDB->be_operational( op, rs );
1867         op->o_bd = be_orig;
1868
1869         return rc;
1870 }
1871