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 1998-2012 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 0
 213         if ( !BER_BVISEMPTY( &be->be_rootndn )
 214                 && select_backend( &be->be_rootndn, 0 ) == be
 215                 && BER_BVISNULL( &be->be_rootpw ) )
 216         {
 217                 /* warning: if rootdn entry is created,
 218                  * it can take rootdn privileges;
 219                  * set empty rootpw to prevent */
 220         }
 221 #endif
 222
 223         if ( be->bd_info->bi_db_open ) {
 224                 rc = be->bd_info->bi_db_open( be, cr );
 225                 if ( rc == 0 ) {
 226                         (void)backend_set_controls( be );
 227
 228                 } else {
 229                         char *type = be->bd_info->bi_type;
 230                         char *suffix = "(null)";
 231
 232                         if ( overlay_is_over( be ) ) {
 233                                 slap_overinfo   *oi = (slap_overinfo *)be->bd_info->bi_private;
 234                                 type = oi->oi_orig->bi_type;
 235                         }
 236
 237                         if ( be->be_suffix != NULL && !BER_BVISNULL( &be->be_suffix[0] ) ) {
 238                                 suffix = be->be_suffix[0].bv_val;
 239                         }
 240
 241                         Debug( LDAP_DEBUG_ANY,
 242                                 "backend_startup_one (type=%s, suffix=\"%s\"): "
 243                                 "bi_db_open failed! (%d)\n",
 244                                 type, suffix, rc );
 245                 }
 246         }
 247
 248         return rc;
 249 }
 250
 251 int backend_startup(Backend *be)
 252 {
 253         int i;
 254         int rc = 0;
 255         BackendInfo *bi;
 256         ConfigReply cr={0, ""};
 257
 258         if( ! ( nBackendDB > 0 ) ) {
 259                 /* no databases */
 260                 Debug( LDAP_DEBUG_ANY,
 261                         "backend_startup: %d databases to startup.\n",
 262                         nBackendDB, 0, 0 );
 263                 return 1;
 264         }
 265
 266         if(be != NULL) {
 267                 if ( be->bd_info->bi_open ) {
 268                         rc = be->bd_info->bi_open( be->bd_info );
 269                         if ( rc != 0 ) {
 270                                 Debug( LDAP_DEBUG_ANY,
 271                                         "backend_startup: bi_open failed!\n",
 272                                         0, 0, 0 );
 273
 274                                 return rc;
 275                         }
 276                 }
 277
 278                 return backend_startup_one( be, &cr );
 279         }
 280
 281         /* open frontend, if required */
 282         if ( frontendDB->bd_info->bi_db_open ) {
 283                 rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr );
 284                 if ( rc != 0 ) {
 285                         Debug( LDAP_DEBUG_ANY,
 286                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 287                                 rc, 0, 0 );
 288                         return rc;
 289                 }
 290         }
 291
 292         /* open each backend type */
 293         i = -1;
 294         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 295                 i++;
 296                 if( bi->bi_nDB == 0) {
 297                         /* no database of this type, don't open */
 298                         continue;
 299                 }
 300
 301                 if( bi->bi_open ) {
 302                         rc = bi->bi_open( bi );
 303                         if ( rc != 0 ) {
 304                                 Debug( LDAP_DEBUG_ANY,
 305                                         "backend_startup: bi_open %d (%s) failed!\n",
 306                                         i, bi->bi_type, 0 );
 307                                 return rc;
 308                         }
 309                 }
 310
 311                 (void)backend_init_controls( bi );
 312         }
 313
 314         /* open each backend database */
 315         i = -1;
 316         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 317                 i++;
 318                 if ( be->be_suffix == NULL ) {
 319                         Debug( LDAP_DEBUG_ANY,
 320                                 "backend_startup: warning, database %d (%s) "
 321                                 "has no suffix\n",
 322                                 i, be->bd_info->bi_type, 0 );
 323                 }
 324
 325                 rc = backend_startup_one( be, &cr );
 326
 327                 if ( rc ) return rc;
 328         }
 329
 330         return rc;
 331 }
 332
 333 int backend_num( Backend *be )
 334 {
 335         int i = 0;
 336         BackendDB *b2;
 337
 338         if( be == NULL ) return -1;
 339
 340         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 341                 if( be == b2 ) return i;
 342                 i++;
 343         }
 344         return -1;
 345 }
 346
 347 int backend_shutdown( Backend *be )
 348 {
 349         int rc = 0;
 350         BackendInfo *bi;
 351
 352         if( be != NULL ) {
 353                 /* shutdown a specific backend database */
 354
 355                 if ( be->bd_info->bi_nDB == 0 ) {
 356                         /* no database of this type, we never opened it */
 357                         return 0;
 358                 }
 359
 360                 if ( be->bd_info->bi_db_close ) {
 361                         rc = be->bd_info->bi_db_close( be, NULL );
 362                         if ( rc ) return rc;
 363                 }
 364
 365                 if( be->bd_info->bi_close ) {
 366                         rc = be->bd_info->bi_close( be->bd_info );
 367                         if ( rc ) return rc;
 368                 }
 369
 370                 return 0;
 371         }
 372
 373         /* close each backend database */
 374         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 375                 if ( be->bd_info->bi_db_close ) {
 376                         be->bd_info->bi_db_close( be, NULL );
 377                 }
 378
 379                 if(rc != 0) {
 380                         Debug( LDAP_DEBUG_ANY,
 381                                 "backend_close: bi_db_close %s failed!\n",
 382                                 be->be_type, 0, 0 );
 383                 }
 384         }
 385
 386         /* close each backend type */
 387         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 388                 if( bi->bi_nDB == 0 ) {
 389                         /* no database of this type */
 390                         continue;
 391                 }
 392
 393                 if( bi->bi_close ) {
 394                         bi->bi_close( bi );
 395                 }
 396         }
 397
 398         /* close frontend, if required */
 399         if ( frontendDB->bd_info->bi_db_close ) {
 400                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 401                 if ( rc != 0 ) {
 402                         Debug( LDAP_DEBUG_ANY,
 403                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 404                                 rc, 0, 0 );
 405                 }
 406         }
 407
 408         return 0;
 409 }
 410
 411 /*
 412  * This function is supposed to be the exact counterpart
 413  * of backend_startup_one(), although this one calls bi_db_destroy()
 414  * while backend_startup_one() calls bi_db_open().
 415  *
 416  * Make sure backend_stopdown_one() destroys resources allocated
 417  * by backend_startup_one(); only call backend_destroy_one() when
 418  * all stuff in a BackendDB needs to be destroyed
 419  */
 420 void
 421 backend_stopdown_one( BackendDB *bd )
 422 {
 423         if ( bd->be_pending_csn_list ) {
 424                 struct slap_csn_entry *csne;
 425                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 426                 while ( csne ) {
 427                         struct slap_csn_entry *tmp_csne = csne;
 428
 429                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 430                         ch_free( csne->ce_csn.bv_val );
 431                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 432                         ch_free( tmp_csne );
 433                 }
 434                 ch_free( bd->be_pending_csn_list );
 435         }
 436
 437         if ( bd->bd_info->bi_db_destroy ) {
 438                 bd->bd_info->bi_db_destroy( bd, NULL );
 439         }
 440 }
 441
 442 void backend_destroy_one( BackendDB *bd, int dynamic )
 443 {
 444         if ( dynamic ) {
 445                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 446         }
 447
 448         if ( bd->be_syncinfo ) {
 449                 syncinfo_free( bd->be_syncinfo, 1 );
 450         }
 451
 452         backend_stopdown_one( bd );
 453
 454         ber_bvarray_free( bd->be_suffix );
 455         ber_bvarray_free( bd->be_nsuffix );
 456         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 457                 free( bd->be_rootdn.bv_val );
 458         }
 459         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 460                 free( bd->be_rootndn.bv_val );
 461         }
 462         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 463                 free( bd->be_rootpw.bv_val );
 464         }
 465         acl_destroy( bd->be_acl );
 466         limits_destroy( bd->be_limits );
 467         if ( bd->be_extra_anlist ) {
 468                 anlist_free( bd->be_extra_anlist, 1, NULL );
 469         }
 470         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 471                 ch_free( bd->be_update_ndn.bv_val );
 472         }
 473         if ( bd->be_update_refs ) {
 474                 ber_bvarray_free( bd->be_update_refs );
 475         }
 476
 477         ldap_pvt_thread_mutex_destroy( &bd->be_pcl_mutex );
 478
 479         if ( dynamic ) {
 480                 free( bd );
 481         }
 482 }
 483
 484 int backend_destroy(void)
 485 {
 486         BackendDB *bd;
 487         BackendInfo *bi;
 488
 489         /* destroy each backend database */
 490         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 491                 backend_destroy_one( bd, 1 );
 492         }
 493
 494         /* destroy each backend type */
 495         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 496                 if( bi->bi_destroy ) {
 497                         bi->bi_destroy( bi );
 498                 }
 499         }
 500
 501         nBackendInfo = 0;
 502         LDAP_STAILQ_INIT(&backendInfo);
 503
 504         /* destroy frontend database */
 505         bd = frontendDB;
 506         if ( bd ) {
 507                 if ( bd->bd_info->bi_db_destroy ) {
 508                         bd->bd_info->bi_db_destroy( bd, NULL );
 509                 }
 510                 ber_bvarray_free( bd->be_suffix );
 511                 ber_bvarray_free( bd->be_nsuffix );
 512                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 513                         free( bd->be_rootdn.bv_val );
 514                 }
 515                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 516                         free( bd->be_rootndn.bv_val );
 517                 }
 518                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 519                         free( bd->be_rootpw.bv_val );
 520                 }
 521                 acl_destroy( bd->be_acl );
 522                 frontendDB = NULL;
 523         }
 524
 525         return 0;
 526 }
 527
 528 BackendInfo* backend_info(const char *type)
 529 {
 530         BackendInfo *bi;
 531
 532         /* search for the backend type */
 533         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 534                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 535                         return bi;
 536                 }
 537         }
 538
 539         return NULL;
 540 }
 541
 542 void
 543 backend_db_insert(
 544         BackendDB *be,
 545         int idx
 546 )
 547 {
 548         /* If idx < 0, just add to end of list */
 549         if ( idx < 0 ) {
 550                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 551         } else if ( idx == 0 ) {
 552                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 553         } else {
 554                 int i;
 555                 BackendDB *b2;
 556
 557                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 558                 idx--;
 559                 for (i=0; i<idx; i++) {
 560                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 561                 }
 562                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 563         }
 564 }
 565
 566 void
 567 backend_db_move(
 568         BackendDB *be,
 569         int idx
 570 )
 571 {
 572         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 573         backend_db_insert(be, idx);
 574 }
 575
 576 BackendDB *
 577 backend_db_init(
 578     const char  *type,
 579         BackendDB *b0,
 580         int idx,
 581         ConfigReply *cr)
 582 {
 583         BackendInfo *bi = backend_info(type);
 584         BackendDB *be = b0;
 585         int     rc = 0;
 586
 587         if( bi == NULL ) {
 588                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 589                 return NULL;
 590         }
 591
 592         /* If be is provided, treat it as private. Otherwise allocate
 593          * one and add it to the global list.
 594          */
 595         if ( !be ) {
 596                 be = ch_calloc( 1, sizeof(Backend) );
 597                 /* Just append */
 598                 if ( idx >= nbackends )
 599                         idx = -1;
 600                 nbackends++;
 601                 backend_db_insert( be, idx );
 602         }
 603
 604         be->bd_info = bi;
 605         be->bd_self = be;
 606
 607         be->be_def_limit = frontendDB->be_def_limit;
 608         be->be_dfltaccess = frontendDB->be_dfltaccess;
 609
 610         be->be_restrictops = frontendDB->be_restrictops;
 611         be->be_requires = frontendDB->be_requires;
 612         be->be_ssf_set = frontendDB->be_ssf_set;
 613
 614         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 615
 616         /* assign a default depth limit for alias deref */
 617         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 618
 619         if ( bi->bi_db_init ) {
 620                 rc = bi->bi_db_init( be, cr );
 621         }
 622
 623         if ( rc != 0 ) {
 624                 fprintf( stderr, "database init failed (%s)\n", type );
 625                 /* If we created and linked this be, remove it and free it */
 626                 if ( !b0 ) {
 627                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 628                         ldap_pvt_thread_mutex_destroy( &be->be_pcl_mutex );
 629                         ch_free( be );
 630                         be = NULL;
 631                         nbackends--;
 632                 }
 633         } else {
 634                 if ( !bi->bi_nDB ) {
 635                         backend_init_controls( bi );
 636                 }
 637                 bi->bi_nDB++;
 638         }
 639         return( be );
 640 }
 641
 642 void
 643 be_db_close( void )
 644 {
 645         BackendDB *be;
 646
 647         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 648                 if ( be->bd_info->bi_db_close ) {
 649                         be->bd_info->bi_db_close( be, NULL );
 650                 }
 651         }
 652
 653         if ( frontendDB->bd_info->bi_db_close ) {
 654                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 655         }
 656
 657 }
 658
 659 Backend *
 660 select_backend(
 661         struct berval * dn,
 662         int noSubs )
 663 {
 664         int             j;
 665         ber_len_t       len, dnlen = dn->bv_len;
 666         Backend         *be;
 667
 668         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 669                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 670                         continue;
 671                 }
 672
 673                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 674                 {
 675                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 676                         {
 677                                 continue;
 678                         }
 679
 680                         len = be->be_nsuffix[j].bv_len;
 681
 682                         if ( len > dnlen ) {
 683                                 /* suffix is longer than DN */
 684                                 continue;
 685                         }
 686
 687                         /*
 688                          * input DN is normalized, so the separator check
 689                          * need not look at escaping
 690                          */
 691                         if ( len && len < dnlen &&
 692                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 693                         {
 694                                 continue;
 695                         }
 696
 697                         if ( strcmp( be->be_nsuffix[j].bv_val,
 698                                 &dn->bv_val[dnlen-len] ) == 0 )
 699                         {
 700                                 return be;
 701                         }
 702                 }
 703         }
 704
 705         return be;
 706 }
 707
 708 int
 709 be_issuffix(
 710     Backend *be,
 711     struct berval *bvsuffix )
 712 {
 713         int     i;
 714
 715         if ( be->be_nsuffix == NULL ) {
 716                 return 0;
 717         }
 718
 719         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 720                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 721                         return 1;
 722                 }
 723         }
 724
 725         return 0;
 726 }
 727
 728 int
 729 be_issubordinate(
 730     Backend *be,
 731     struct berval *bvsubordinate )
 732 {
 733         int     i;
 734
 735         if ( be->be_nsuffix == NULL ) {
 736                 return 0;
 737         }
 738
 739         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 740                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 741                         return 1;
 742                 }
 743         }
 744
 745         return 0;
 746 }
 747
 748 int
 749 be_isroot_dn( Backend *be, struct berval *ndn )
 750 {
 751         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 752                 return 0;
 753         }
 754
 755         return dn_match( &be->be_rootndn, ndn );
 756 }
 757
 758 int
 759 be_slurp_update( Operation *op )
 760 {
 761         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 762                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 763 }
 764
 765 int
 766 be_shadow_update( Operation *op )
 767 {
 768         /* This assumes that all internal ops (connid <= -1000) on a syncrepl
 769          * database are syncrepl operations.
 770          */
 771         return ( ( SLAP_SYNC_SHADOW( op->o_bd ) && SLAPD_SYNC_IS_SYNCCONN( op->o_connid ) ) ||
 772                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 773 }
 774
 775 int
 776 be_isupdate_dn( Backend *be, struct berval *ndn )
 777 {
 778         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 779                 return 0;
 780         }
 781
 782         return dn_match( &be->be_update_ndn, ndn );
 783 }
 784
 785 struct berval *
 786 be_root_dn( Backend *be )
 787 {
 788         return &be->be_rootdn;
 789 }
 790
 791 int
 792 be_isroot( Operation *op )
 793 {
 794         return be_isroot_dn( op->o_bd, &op->o_ndn );
 795 }
 796
 797 int
 798 be_isroot_pw( Operation *op )
 799 {
 800         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 801 }
 802
 803 /*
 804  * checks if binding as rootdn
 805  *
 806  * return value:
 807  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 808  *      LDAP_SUCCESS                    if rootdn & rootpw
 809  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 810  *
 811  * if rs != NULL
 812  *      if LDAP_SUCCESS, op->orb_edn is set
 813  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 814  */
 815 int
 816 be_rootdn_bind( Operation *op, SlapReply *rs )
 817 {
 818         int             rc;
 819 #ifdef SLAPD_SPASSWD
 820         void    *old_authctx = NULL;
 821 #endif
 822
 823         assert( op->o_tag == LDAP_REQ_BIND );
 824         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 825
 826         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 827                 return SLAP_CB_CONTINUE;
 828         }
 829
 830         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 831                 /* give the database a chance */
 832                 return SLAP_CB_CONTINUE;
 833         }
 834
 835         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 836                 /* rootdn bind explicitly disallowed */
 837                 rc = LDAP_INVALID_CREDENTIALS;
 838                 if ( rs ) {
 839                         goto send_result;
 840                 }
 841
 842                 return rc;
 843         }
 844
 845 #ifdef SLAPD_SPASSWD
 846         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 847                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 848 #endif
 849
 850         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 851
 852 #ifdef SLAPD_SPASSWD
 853         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 854                 old_authctx, 0, NULL, NULL );
 855 #endif
 856
 857         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 858         if ( rs ) {
 859 send_result:;
 860                 rs->sr_err = rc;
 861
 862                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 863                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 864                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 865
 866                 if ( rc == LDAP_SUCCESS ) {
 867                         /* Set to the pretty rootdn */
 868                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 869
 870                 } else {
 871                         send_ldap_result( op, rs );
 872                 }
 873         }
 874
 875         return rc;
 876 }
 877
 878 int
 879 be_entry_release_rw(
 880         Operation *op,
 881         Entry *e,
 882         int rw )
 883 {
 884         if ( op->o_bd->be_release ) {
 885                 /* free and release entry from backend */
 886                 return op->o_bd->be_release( op, e, rw );
 887         } else {
 888                 /* free entry */
 889                 entry_free( e );
 890                 return 0;
 891         }
 892 }
 893
 894 int
 895 backend_unbind( Operation *op, SlapReply *rs )
 896 {
 897         BackendDB *be;
 898
 899         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 900                 if ( be->be_unbind ) {
 901                         op->o_bd = be;
 902                         be->be_unbind( op, rs );
 903                 }
 904         }
 905
 906         return 0;
 907 }
 908
 909 int
 910 backend_connection_init(
 911         Connection   *conn )
 912 {
 913         BackendDB *be;
 914
 915         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 916                 if ( be->be_connection_init ) {
 917                         be->be_connection_init( be, conn );
 918                 }
 919         }
 920
 921         return 0;
 922 }
 923
 924 int
 925 backend_connection_destroy(
 926         Connection   *conn )
 927 {
 928         BackendDB *be;
 929
 930         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 931                 if ( be->be_connection_destroy ) {
 932                         be->be_connection_destroy( be, conn);
 933                 }
 934         }
 935
 936         return 0;
 937 }
 938
 939 int
 940 backend_check_controls(
 941         Operation *op,
 942         SlapReply *rs )
 943 {
 944         LDAPControl **ctrls = op->o_ctrls;
 945         rs->sr_err = LDAP_SUCCESS;
 946
 947         if( ctrls ) {
 948                 for( ; *ctrls != NULL ; ctrls++ ) {
 949                         int cid;
 950
 951                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 952                         case LDAP_CONTROL_NOT_FOUND:
 953                                 /* unrecognized control */
 954                                 if ( (*ctrls)->ldctl_iscritical ) {
 955                                         /* should not be reachable */
 956                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 957                                                 "unrecognized critical control: %s\n",
 958                                                 (*ctrls)->ldctl_oid, 0, 0 );
 959                                         assert( 0 );
 960                                 } else {
 961                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 962                                                 "unrecognized non-critical control: %s\n",
 963                                                 (*ctrls)->ldctl_oid, 0, 0 );
 964                                 }
 965                                 break;
 966
 967                         case LDAP_COMPARE_FALSE:
 968                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 969 #ifdef SLAP_CONTROL_X_WHATFAILED
 970                                         if ( get_whatFailed( op ) ) {
 971                                                 char *oids[ 2 ];
 972                                                 oids[ 0 ] = (*ctrls)->ldctl_oid;
 973                                                 oids[ 1 ] = NULL;
 974                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 975                                         }
 976 #endif
 977                                         /* RFC 4511 allows unavailableCriticalExtension to be
 978                                          * returned when the server is unwilling to perform
 979                                          * an operation extended by a recognized critical
 980                                          * control.
 981                                          */
 982                                         rs->sr_text = "critical control unavailable in context";
 983                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 984                                         goto done;
 985                                 }
 986                                 break;
 987
 988                         case LDAP_COMPARE_TRUE:
 989                                 break;
 990
 991                         default:
 992                                 /* unreachable */
 993                                 Debug( LDAP_DEBUG_ANY,
 994                                         "backend_check_controls: unable to check control: %s\n",
 995                                         (*ctrls)->ldctl_oid, 0, 0 );
 996                                 assert( 0 );
 997
 998                                 rs->sr_text = "unable to check control";
 999                                 rs->sr_err = LDAP_OTHER;
1000                                 goto done;
1001                         }
1002                 }
1003         }
1004
1005 #if 0 /* temporarily removed */
1006         /* check should be generalized */
1007         if( get_relax(op) && !be_isroot(op)) {
1008                 rs->sr_text = "requires manager authorization";
1009                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1010         }
1011 #endif
1012
1013 done:;
1014         return rs->sr_err;
1015 }
1016
1017 int
1018 backend_check_restrictions(
1019         Operation *op,
1020         SlapReply *rs,
1021         struct berval *opdata )
1022 {
1023         slap_mask_t restrictops;
1024         slap_mask_t requires;
1025         slap_mask_t opflag;
1026         slap_mask_t exopflag = 0;
1027         slap_ssf_set_t ssfs, *ssf;
1028         int updateop = 0;
1029         int starttls = 0;
1030         int session = 0;
1031
1032         restrictops = frontendDB->be_restrictops;
1033         requires = frontendDB->be_requires;
1034         ssfs = frontendDB->be_ssf_set;
1035         ssf = &ssfs;
1036
1037         if ( op->o_bd ) {
1038                 slap_ssf_t *fssf, *bssf;
1039                 int     rc = SLAP_CB_CONTINUE, i;
1040
1041                 if ( op->o_bd->be_chk_controls ) {
1042                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1043                 }
1044
1045                 if ( rc == SLAP_CB_CONTINUE ) {
1046                         rc = backend_check_controls( op, rs );
1047                 }
1048
1049                 if ( rc != LDAP_SUCCESS ) {
1050                         return rs->sr_err;
1051                 }
1052
1053                 restrictops |= op->o_bd->be_restrictops;
1054                 requires |= op->o_bd->be_requires;
1055                 bssf = &op->o_bd->be_ssf_set.sss_ssf;
1056                 fssf = &ssfs.sss_ssf;
1057                 for ( i=0; i < (int)(sizeof(ssfs)/sizeof(slap_ssf_t)); i++ ) {
1058                         if ( bssf[i] ) fssf[i] = bssf[i];
1059                 }
1060         }
1061
1062         switch( op->o_tag ) {
1063         case LDAP_REQ_ADD:
1064                 opflag = SLAP_RESTRICT_OP_ADD;
1065                 updateop++;
1066                 break;
1067         case LDAP_REQ_BIND:
1068                 opflag = SLAP_RESTRICT_OP_BIND;
1069                 session++;
1070                 break;
1071         case LDAP_REQ_COMPARE:
1072                 opflag = SLAP_RESTRICT_OP_COMPARE;
1073                 break;
1074         case LDAP_REQ_DELETE:
1075                 updateop++;
1076                 opflag = SLAP_RESTRICT_OP_DELETE;
1077                 break;
1078         case LDAP_REQ_EXTENDED:
1079                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1080
1081                 if( !opdata ) {
1082                         /* treat unspecified as a modify */
1083                         opflag = SLAP_RESTRICT_OP_MODIFY;
1084                         updateop++;
1085                         break;
1086                 }
1087
1088                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1089                         session++;
1090                         starttls++;
1091                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1092                         break;
1093                 }
1094
1095                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1096                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1097                         break;
1098                 }
1099
1100                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1101                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1102                         break;
1103                 }
1104
1105                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1106                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1107                         updateop++;
1108                         break;
1109                 }
1110
1111                 /* treat everything else as a modify */
1112                 opflag = SLAP_RESTRICT_OP_MODIFY;
1113                 updateop++;
1114                 break;
1115
1116         case LDAP_REQ_MODIFY:
1117                 updateop++;
1118                 opflag = SLAP_RESTRICT_OP_MODIFY;
1119                 break;
1120         case LDAP_REQ_RENAME:
1121                 updateop++;
1122                 opflag = SLAP_RESTRICT_OP_RENAME;
1123                 break;
1124         case LDAP_REQ_SEARCH:
1125                 opflag = SLAP_RESTRICT_OP_SEARCH;
1126                 break;
1127         case LDAP_REQ_UNBIND:
1128                 session++;
1129                 opflag = 0;
1130                 break;
1131         default:
1132                 rs->sr_text = "restrict operations internal error";
1133                 rs->sr_err = LDAP_OTHER;
1134                 return rs->sr_err;
1135         }
1136
1137         if ( !starttls ) {
1138                 /* these checks don't apply to StartTLS */
1139
1140                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1141                 if( op->o_transport_ssf < ssf->sss_transport ) {
1142                         rs->sr_text = op->o_transport_ssf
1143                                 ? "stronger transport confidentiality required"
1144                                 : "transport confidentiality required";
1145                         return rs->sr_err;
1146                 }
1147
1148                 if( op->o_tls_ssf < ssf->sss_tls ) {
1149                         rs->sr_text = op->o_tls_ssf
1150                                 ? "stronger TLS confidentiality required"
1151                                 : "TLS confidentiality required";
1152                         return rs->sr_err;
1153                 }
1154
1155
1156                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1157                         /* simple bind specific check */
1158                         if( op->o_ssf < ssf->sss_simple_bind ) {
1159                                 rs->sr_text = op->o_ssf
1160                                         ? "stronger confidentiality required"
1161                                         : "confidentiality required";
1162                                 return rs->sr_err;
1163                         }
1164                 }
1165
1166                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1167                         /* these checks don't apply to SASL bind */
1168
1169                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1170                                 rs->sr_text = op->o_sasl_ssf
1171                                         ? "stronger SASL confidentiality required"
1172                                         : "SASL confidentiality required";
1173                                 return rs->sr_err;
1174                         }
1175
1176                         if( op->o_ssf < ssf->sss_ssf ) {
1177                                 rs->sr_text = op->o_ssf
1178                                         ? "stronger confidentiality required"
1179                                         : "confidentiality required";
1180                                 return rs->sr_err;
1181                         }
1182                 }
1183
1184                 if( updateop ) {
1185                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1186                                 rs->sr_text = op->o_transport_ssf
1187                                         ? "stronger transport confidentiality required for update"
1188                                         : "transport confidentiality required for update";
1189                                 return rs->sr_err;
1190                         }
1191
1192                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1193                                 rs->sr_text = op->o_tls_ssf
1194                                         ? "stronger TLS confidentiality required for update"
1195                                         : "TLS confidentiality required for update";
1196                                 return rs->sr_err;
1197                         }
1198
1199                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1200                                 rs->sr_text = op->o_sasl_ssf
1201                                         ? "stronger SASL confidentiality required for update"
1202                                         : "SASL confidentiality required for update";
1203                                 return rs->sr_err;
1204                         }
1205
1206                         if( op->o_ssf < ssf->sss_update_ssf ) {
1207                                 rs->sr_text = op->o_ssf
1208                                         ? "stronger confidentiality required for update"
1209                                         : "confidentiality required for update";
1210                                 return rs->sr_err;
1211                         }
1212
1213                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1214                                 BER_BVISEMPTY( &op->o_ndn ) )
1215                         {
1216                                 rs->sr_text = "modifications require authentication";
1217                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1218                                 return rs->sr_err;
1219                         }
1220
1221 #ifdef SLAP_X_LISTENER_MOD
1222                         if ( op->o_conn->c_listener &&
1223                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1224                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1225                         {
1226                                 /* no "w" mode means readonly */
1227                                 rs->sr_text = "modifications not allowed on this listener";
1228                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1229                                 return rs->sr_err;
1230                         }
1231 #endif /* SLAP_X_LISTENER_MOD */
1232                 }
1233         }
1234
1235         if ( !session ) {
1236                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1237
1238                 if( requires & SLAP_REQUIRE_STRONG ) {
1239                         /* should check mechanism */
1240                         if( ( op->o_transport_ssf < ssf->sss_transport
1241                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1242                                 || BER_BVISEMPTY( &op->o_dn ) )
1243                         {
1244                                 rs->sr_text = "strong(er) authentication required";
1245                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1246                                 return rs->sr_err;
1247                         }
1248                 }
1249
1250                 if( requires & SLAP_REQUIRE_SASL ) {
1251                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1252                                 rs->sr_text = "SASL authentication required";
1253                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1254                                 return rs->sr_err;
1255                         }
1256                 }
1257
1258                 if( requires & SLAP_REQUIRE_AUTHC ) {
1259                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1260                                 rs->sr_text = "authentication required";
1261                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1262                                 return rs->sr_err;
1263                         }
1264                 }
1265
1266                 if( requires & SLAP_REQUIRE_BIND ) {
1267                         int version;
1268                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1269                         version = op->o_conn->c_protocol;
1270                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1271
1272                         if( !version ) {
1273                                 /* no bind has occurred */
1274                                 rs->sr_text = "BIND required";
1275                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1276                                 return rs->sr_err;
1277                         }
1278                 }
1279
1280                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1281                         if( op->o_protocol < LDAP_VERSION3 ) {
1282                                 /* no bind has occurred */
1283                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1284                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1285                                 return rs->sr_err;
1286                         }
1287                 }
1288
1289 #ifdef SLAP_X_LISTENER_MOD
1290                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1291                         if ( op->o_conn->c_listener &&
1292                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1293                 {
1294                                 /* no "x" mode means bind required */
1295                                 rs->sr_text = "bind required on this listener";
1296                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1297                                 return rs->sr_err;
1298                         }
1299                 }
1300
1301                 if ( !starttls && !updateop ) {
1302                         if ( op->o_conn->c_listener &&
1303                                 !( op->o_conn->c_listener->sl_perms &
1304                                         ( !BER_BVISEMPTY( &op->o_dn )
1305                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1306                         {
1307                                 /* no "r" mode means no read */
1308                                 rs->sr_text = "read not allowed on this listener";
1309                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1310                                 return rs->sr_err;
1311                         }
1312                 }
1313 #endif /* SLAP_X_LISTENER_MOD */
1314
1315         }
1316
1317         if( ( restrictops & opflag )
1318                         || ( exopflag && ( restrictops & exopflag ) )
1319                         || (( restrictops & SLAP_RESTRICT_READONLY ) && updateop )) {
1320                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1321                         rs->sr_text = "read operations restricted";
1322                 } else if ( restrictops & exopflag ) {
1323                         rs->sr_text = "extended operation restricted";
1324                 } else {
1325                         rs->sr_text = "operation restricted";
1326                 }
1327                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1328                 return rs->sr_err;
1329         }
1330
1331         rs->sr_err = LDAP_SUCCESS;
1332         return rs->sr_err;
1333 }
1334
1335 int backend_check_referrals( Operation *op, SlapReply *rs )
1336 {
1337         rs->sr_err = LDAP_SUCCESS;
1338
1339         if( op->o_bd->be_chk_referrals ) {
1340                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1341
1342                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1343                         send_ldap_result( op, rs );
1344                 }
1345         }
1346
1347         return rs->sr_err;
1348 }
1349
1350 int
1351 be_entry_get_rw(
1352         Operation *op,
1353         struct berval *ndn,
1354         ObjectClass *oc,
1355         AttributeDescription *at,
1356         int rw,
1357         Entry **e )
1358 {
1359         *e = NULL;
1360
1361         if ( op->o_bd == NULL ) {
1362                 return LDAP_NO_SUCH_OBJECT;
1363         }
1364
1365         if ( op->o_bd->be_fetch ) {
1366                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1367         }
1368
1369         return LDAP_UNWILLING_TO_PERFORM;
1370 }
1371
1372 int
1373 fe_acl_group(
1374         Operation *op,
1375         Entry   *target,
1376         struct berval *gr_ndn,
1377         struct berval *op_ndn,
1378         ObjectClass *group_oc,
1379         AttributeDescription *group_at )
1380 {
1381         Entry *e;
1382         void *o_priv = op->o_private, *e_priv = NULL;
1383         Attribute *a;
1384         int rc;
1385         GroupAssertion *g;
1386         Backend *be = op->o_bd;
1387         OpExtra         *oex;
1388
1389         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1390                 if ( oex->oe_key == (void *)backend_group )
1391                         break;
1392         }
1393
1394         if ( oex && ((OpExtraDB *)oex)->oe_db )
1395                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1396
1397         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1398                 op->o_bd = select_backend( gr_ndn, 0 );
1399
1400         for ( g = op->o_groups; g; g = g->ga_next ) {
1401                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1402                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1403                 {
1404                         continue;
1405                 }
1406                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1407                         break;
1408                 }
1409         }
1410
1411         if ( g ) {
1412                 rc = g->ga_res;
1413                 goto done;
1414         }
1415
1416         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1417                 e = target;
1418                 rc = 0;
1419
1420         } else {
1421                 op->o_private = NULL;
1422                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1423                 e_priv = op->o_private;
1424                 op->o_private = o_priv;
1425         }
1426
1427         if ( e ) {
1428                 a = attr_find( e->e_attrs, group_at );
1429                 if ( a ) {
1430                         /* If the attribute is a subtype of labeledURI,
1431                          * treat this as a dynamic group ala groupOfURLs
1432                          */
1433                         if ( is_at_subtype( group_at->ad_type,
1434                                 slap_schema.si_ad_labeledURI->ad_type ) )
1435                         {
1436                                 int i;
1437                                 LDAPURLDesc *ludp;
1438                                 struct berval bv, nbase;
1439                                 Filter *filter;
1440                                 Entry *user = NULL;
1441                                 void *user_priv = NULL;
1442                                 Backend *b2 = op->o_bd;
1443
1444                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1445                                         user = target;
1446                                 }
1447
1448                                 rc = LDAP_COMPARE_FALSE;
1449                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1450                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1451                                                 LDAP_URL_SUCCESS )
1452                                         {
1453                                                 continue;
1454                                         }
1455
1456                                         BER_BVZERO( &nbase );
1457
1458                                         /* host, attrs and extensions parts must be empty */
1459                                         if ( ( ludp->lud_host && *ludp->lud_host )
1460                                                 || ludp->lud_attrs
1461                                                 || ludp->lud_exts )
1462                                         {
1463                                                 goto loopit;
1464                                         }
1465
1466                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1467                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1468                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1469                                         {
1470                                                 goto loopit;
1471                                         }
1472
1473                                         switch ( ludp->lud_scope ) {
1474                                         case LDAP_SCOPE_BASE:
1475                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1476                                                         goto loopit;
1477                                                 }
1478                                                 break;
1479                                         case LDAP_SCOPE_ONELEVEL:
1480                                                 dnParent( op_ndn, &bv );
1481                                                 if ( !dn_match( &nbase, &bv ) ) {
1482                                                         goto loopit;
1483                                                 }
1484                                                 break;
1485                                         case LDAP_SCOPE_SUBTREE:
1486                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1487                                                         goto loopit;
1488                                                 }
1489                                                 break;
1490                                         case LDAP_SCOPE_SUBORDINATE:
1491                                                 if ( dn_match( &nbase, op_ndn ) ||
1492                                                         !dnIsSuffix( op_ndn, &nbase ) )
1493                                                 {
1494                                                         goto loopit;
1495                                                 }
1496                                         }
1497
1498                                         /* NOTE: this could be NULL
1499                                          * if no filter is provided,
1500                                          * or if filter parsing fails.
1501                                          * In the latter case,
1502                                          * we should give up. */
1503                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1504                                                 filter = str2filter_x( op, ludp->lud_filter );
1505                                                 if ( filter == NULL ) {
1506                                                         /* give up... */
1507                                                         rc = LDAP_OTHER;
1508                                                         goto loopit;
1509                                                 }
1510
1511                                                 /* only get user if required
1512                                                  * and not available yet */
1513                                                 if ( user == NULL ) {
1514                                                         int rc2;
1515
1516                                                         op->o_bd = select_backend( op_ndn, 0 );
1517                                                         op->o_private = NULL;
1518                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1519                                                         user_priv = op->o_private;
1520                                                         op->o_private = o_priv;
1521                                                         if ( rc2 != 0 ) {
1522                                                                 /* give up... */
1523                                                                 rc = LDAP_OTHER;
1524                                                                 goto loopit;
1525                                                         }
1526                                                 }
1527
1528                                                 if ( test_filter( NULL, user, filter ) ==
1529                                                         LDAP_COMPARE_TRUE )
1530                                                 {
1531                                                         rc = 0;
1532                                                 }
1533                                                 filter_free_x( op, filter, 1 );
1534                                         }
1535 loopit:
1536                                         ldap_free_urldesc( ludp );
1537                                         if ( !BER_BVISNULL( &nbase ) ) {
1538                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1539                                         }
1540                                         if ( rc != LDAP_COMPARE_FALSE ) {
1541                                                 break;
1542                                         }
1543                                 }
1544
1545                                 if ( user != NULL && user != target ) {
1546                                         op->o_private = user_priv;
1547                                         be_entry_release_r( op, user );
1548                                         op->o_private = o_priv;
1549                                 }
1550                                 op->o_bd = b2;
1551
1552                         } else {
1553                                 rc = attr_valfind( a,
1554                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1555                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1556                                         op_ndn, NULL, op->o_tmpmemctx );
1557                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1558                                         rc = LDAP_COMPARE_FALSE;
1559                                 }
1560                         }
1561
1562                 } else {
1563                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1564                 }
1565
1566                 if ( e != target ) {
1567                         op->o_private = e_priv;
1568                         be_entry_release_r( op, e );
1569                         op->o_private = o_priv;
1570                 }
1571
1572         } else {
1573                 rc = LDAP_NO_SUCH_OBJECT;
1574         }
1575
1576         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1577                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1578                         op->o_tmpmemctx );
1579                 g->ga_be = op->o_bd;
1580                 g->ga_oc = group_oc;
1581                 g->ga_at = group_at;
1582                 g->ga_res = rc;
1583                 g->ga_len = gr_ndn->bv_len;
1584                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1585                 g->ga_next = op->o_groups;
1586                 op->o_groups = g;
1587         }
1588
1589 done:
1590         op->o_bd = be;
1591         return rc;
1592 }
1593
1594 int
1595 backend_group(
1596         Operation *op,
1597         Entry   *target,
1598         struct berval *gr_ndn,
1599         struct berval *op_ndn,
1600         ObjectClass *group_oc,
1601         AttributeDescription *group_at )
1602 {
1603         int                     rc;
1604         BackendDB *be_orig;
1605         OpExtraDB       oex;
1606
1607         if ( op->o_abandon ) {
1608                 return SLAPD_ABANDON;
1609         }
1610
1611         oex.oe_db = op->o_bd;
1612         oex.oe.oe_key = (void *)backend_group;
1613         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1614
1615         be_orig = op->o_bd;
1616         op->o_bd = frontendDB;
1617         rc = frontendDB->be_group( op, target, gr_ndn,
1618                 op_ndn, group_oc, group_at );
1619         op->o_bd = be_orig;
1620         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1621
1622         return rc;
1623 }
1624
1625 int
1626 fe_acl_attribute(
1627         Operation *op,
1628         Entry   *target,
1629         struct berval   *edn,
1630         AttributeDescription *entry_at,
1631         BerVarray *vals,
1632         slap_access_t access )
1633 {
1634         Entry                   *e = NULL;
1635         void                    *o_priv = op->o_private, *e_priv = NULL;
1636         Attribute               *a = NULL;
1637         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1638         AccessControlState      acl_state = ACL_STATE_INIT;
1639         Backend                 *be = op->o_bd;
1640         OpExtra         *oex;
1641
1642         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1643                 if ( oex->oe_key == (void *)backend_attribute )
1644                         break;
1645         }
1646
1647         if ( oex && ((OpExtraDB *)oex)->oe_db )
1648                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1649
1650         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1651                 op->o_bd = select_backend( edn, 0 );
1652
1653         if ( target && dn_match( &target->e_nname, edn ) ) {
1654                 e = target;
1655
1656         } else {
1657                 op->o_private = NULL;
1658                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1659                 e_priv = op->o_private;
1660                 op->o_private = o_priv;
1661         }
1662
1663         if ( e ) {
1664                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1665                         assert( vals == NULL );
1666
1667                         rc = LDAP_SUCCESS;
1668                         if ( op->o_conn && access > ACL_NONE &&
1669                                 access_allowed( op, e, entry_at, NULL,
1670                                                 access, &acl_state ) == 0 )
1671                         {
1672                                 rc = LDAP_INSUFFICIENT_ACCESS;
1673                         }
1674                         goto freeit;
1675                 }
1676
1677                 a = attr_find( e->e_attrs, entry_at );
1678                 if ( a == NULL ) {
1679                         SlapReply       rs = { REP_SEARCH };
1680                         AttributeName   anlist[ 2 ];
1681
1682                         anlist[ 0 ].an_name = entry_at->ad_cname;
1683                         anlist[ 0 ].an_desc = entry_at;
1684                         BER_BVZERO( &anlist[ 1 ].an_name );
1685                         rs.sr_attrs = anlist;
1686
1687                         /* NOTE: backend_operational() is also called
1688                          * when returning results, so it's supposed
1689                          * to do no harm to entries */
1690                         rs.sr_entry = e;
1691                         rc = backend_operational( op, &rs );
1692
1693                         if ( rc == LDAP_SUCCESS ) {
1694                                 if ( rs.sr_operational_attrs ) {
1695                                         freeattr = 1;
1696                                         a = rs.sr_operational_attrs;
1697
1698                                 } else {
1699                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1700                                 }
1701                         }
1702                 }
1703
1704                 if ( a ) {
1705                         BerVarray v;
1706
1707                         if ( op->o_conn && access > ACL_NONE &&
1708                                 access_allowed( op, e, entry_at, NULL,
1709                                                 access, &acl_state ) == 0 )
1710                         {
1711                                 rc = LDAP_INSUFFICIENT_ACCESS;
1712                                 goto freeit;
1713                         }
1714
1715                         i = a->a_numvals;
1716                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1717                                 op->o_tmpmemctx );
1718                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1719                         {
1720                                 if ( op->o_conn && access > ACL_NONE &&
1721                                         access_allowed( op, e, entry_at,
1722                                                         &a->a_nvals[i],
1723                                                         access,
1724                                                         &acl_state ) == 0 )
1725                                 {
1726                                         continue;
1727                                 }
1728                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1729                                                 op->o_tmpmemctx );
1730                                 if ( !BER_BVISNULL( &v[j] ) ) {
1731                                         j++;
1732                                 }
1733                         }
1734                         if ( j == 0 ) {
1735                                 op->o_tmpfree( v, op->o_tmpmemctx );
1736                                 *vals = NULL;
1737                                 rc = LDAP_INSUFFICIENT_ACCESS;
1738
1739                         } else {
1740                                 BER_BVZERO( &v[j] );
1741                                 *vals = v;
1742                                 rc = LDAP_SUCCESS;
1743                         }
1744                 }
1745 freeit:         if ( e != target ) {
1746                         op->o_private = e_priv;
1747                         be_entry_release_r( op, e );
1748                         op->o_private = o_priv;
1749                 }
1750                 if ( freeattr ) {
1751                         attr_free( a );
1752                 }
1753         }
1754
1755         op->o_bd = be;
1756         return rc;
1757 }
1758
1759 int
1760 backend_attribute(
1761         Operation *op,
1762         Entry   *target,
1763         struct berval   *edn,
1764         AttributeDescription *entry_at,
1765         BerVarray *vals,
1766         slap_access_t access )
1767 {
1768         int                     rc;
1769         BackendDB *be_orig;
1770         OpExtraDB       oex;
1771
1772         oex.oe_db = op->o_bd;
1773         oex.oe.oe_key = (void *)backend_attribute;
1774         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1775
1776         be_orig = op->o_bd;
1777         op->o_bd = frontendDB;
1778         rc = frontendDB->be_attribute( op, target, edn,
1779                 entry_at, vals, access );
1780         op->o_bd = be_orig;
1781         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1782
1783         return rc;
1784 }
1785
1786 int
1787 backend_access(
1788         Operation               *op,
1789         Entry                   *target,
1790         struct berval           *edn,
1791         AttributeDescription    *entry_at,
1792         struct berval           *nval,
1793         slap_access_t           access,
1794         slap_mask_t             *mask )
1795 {
1796         Entry           *e = NULL;
1797         void            *o_priv, *e_priv = NULL;
1798         int             rc = LDAP_INSUFFICIENT_ACCESS;
1799         Backend         *be;
1800
1801         /* pedantic */
1802         assert( op != NULL );
1803         assert( op->o_conn != NULL );
1804         assert( edn != NULL );
1805         assert( access > ACL_NONE );
1806
1807         be = op->o_bd;
1808         o_priv = op->o_private;
1809
1810         if ( !op->o_bd ) {
1811                 op->o_bd = select_backend( edn, 0 );
1812         }
1813
1814         if ( target && dn_match( &target->e_nname, edn ) ) {
1815                 e = target;
1816
1817         } else {
1818                 op->o_private = NULL;
1819                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1820                 e_priv = op->o_private;
1821                 op->o_private = o_priv;
1822         }
1823
1824         if ( e ) {
1825                 Attribute       *a = NULL;
1826                 int             freeattr = 0;
1827
1828                 if ( entry_at == NULL ) {
1829                         entry_at = slap_schema.si_ad_entry;
1830                 }
1831
1832                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1833                 {
1834                         if ( access_allowed_mask( op, e, entry_at,
1835                                         NULL, access, NULL, mask ) == 0 )
1836                         {
1837                                 rc = LDAP_INSUFFICIENT_ACCESS;
1838
1839                         } else {
1840                                 rc = LDAP_SUCCESS;
1841                         }
1842
1843                 } else {
1844                         a = attr_find( e->e_attrs, entry_at );
1845                         if ( a == NULL ) {
1846                                 SlapReply       rs = { REP_SEARCH };
1847                                 AttributeName   anlist[ 2 ];
1848
1849                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1850                                 anlist[ 0 ].an_desc = entry_at;
1851                                 BER_BVZERO( &anlist[ 1 ].an_name );
1852                                 rs.sr_attrs = anlist;
1853
1854                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1855
1856                                 /* NOTE: backend_operational() is also called
1857                                  * when returning results, so it's supposed
1858                                  * to do no harm to entries */
1859                                 rs.sr_entry = e;
1860                                 rc = backend_operational( op, &rs );
1861
1862                                 if ( rc == LDAP_SUCCESS ) {
1863                                         if ( rs.sr_operational_attrs ) {
1864                                                 freeattr = 1;
1865                                                 a = rs.sr_operational_attrs;
1866
1867                                         } else {
1868                                                 rc = LDAP_NO_SUCH_OBJECT;
1869                                         }
1870                                 }
1871                         }
1872
1873                         if ( a ) {
1874                                 if ( access_allowed_mask( op, e, entry_at,
1875                                                 nval, access, NULL, mask ) == 0 )
1876                                 {
1877                                         rc = LDAP_INSUFFICIENT_ACCESS;
1878                                         goto freeit;
1879                                 }
1880                                 rc = LDAP_SUCCESS;
1881                         }
1882                 }
1883 freeit:         if ( e != target ) {
1884                         op->o_private = e_priv;
1885                         be_entry_release_r( op, e );
1886                         op->o_private = o_priv;
1887                 }
1888                 if ( freeattr ) {
1889                         attr_free( a );
1890                 }
1891         }
1892
1893         op->o_bd = be;
1894         return rc;
1895 }
1896
1897 int
1898 fe_aux_operational(
1899         Operation *op,
1900         SlapReply *rs )
1901 {
1902         Attribute               **ap;
1903         int                     rc = LDAP_SUCCESS;
1904         BackendDB               *be_orig = op->o_bd;
1905         OpExtra         *oex;
1906
1907         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1908                 if ( oex->oe_key == (void *)backend_operational )
1909                         break;
1910         }
1911
1912         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1913                 /* just count them */ ;
1914
1915         /*
1916          * If operational attributes (allegedly) are required,
1917          * and the backend supports specific operational attributes,
1918          * add them to the attribute list
1919          */
1920         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1921                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1922                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1923         {
1924                 *ap = slap_operational_entryDN( rs->sr_entry );
1925                 ap = &(*ap)->a_next;
1926         }
1927
1928         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1929                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1930                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1931         {
1932                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1933                 ap = &(*ap)->a_next;
1934         }
1935
1936         /* Let the overlays have a chance at this */
1937         if ( oex && ((OpExtraDB *)oex)->oe_db )
1938                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1939
1940         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1941                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1942
1943         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1944                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1945                 op->o_bd->be_operational != NULL )
1946         {
1947                 rc = op->o_bd->be_operational( op, rs );
1948         }
1949         op->o_bd = be_orig;
1950
1951         return rc;
1952 }
1953
1954 int backend_operational( Operation *op, SlapReply *rs )
1955 {
1956         int rc;
1957         BackendDB *be_orig;
1958         OpExtraDB       oex;
1959
1960         oex.oe_db = op->o_bd;
1961         oex.oe.oe_key = (void *)backend_operational;
1962         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1963
1964         /* Moved this into the frontend so global overlays are called */
1965
1966         be_orig = op->o_bd;
1967         op->o_bd = frontendDB;
1968         rc = frontendDB->be_operational( op, rs );
1969         op->o_bd = be_orig;
1970         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1971
1972         return rc;
1973 }
1974
1975 /* helper that calls the bi_tool_entry_first_x() variant with default args;
1976  * use to initialize a backend's bi_tool_entry_first() when appropriate
1977  */
1978 ID
1979 backend_tool_entry_first( BackendDB *be )
1980 {
1981         return be->bd_info->bi_tool_entry_first_x( be,
1982                 NULL, LDAP_SCOPE_DEFAULT, NULL );
1983 }