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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /* backend.c - routines for dealing with back-end databases */
   7
   8
   9 #include "portable.h"
  10
  11 #include <stdio.h>
  12
  13 #include <ac/string.h>
  14 #include <ac/socket.h>
  15
  16 #include <sys/stat.h>
  17
  18 #include "slap.h"
  19 #include "lutil.h"
  20
  21 /*
  22  * If a module is configured as dynamic, its header should not
  23  * get included into slapd. While this is a general rule and does
  24  * not have much of an effect in UNIX, this rule should be adhered
  25  * to for Windows, where dynamic object code should not be implicitly
  26  * imported into slapd without appropriate __declspec(dllimport) directives.
  27  */
  28
  29 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  30 #include "back-bdb/external.h"
  31 #endif
  32 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  33 #include "back-dnssrv/external.h"
  34 #endif
  35 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  36 #include "back-ldap/external.h"
  37 #endif
  38 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  39 #include "back-ldbm/external.h"
  40 #endif
  41 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  42 #include "back-meta/external.h"
  43 #endif
  44 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  45 #include "back-monitor/external.h"
  46 #endif
  47 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  48 #include "back-passwd/external.h"
  49 #endif
  50 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  51 #include "back-perl/external.h"
  52 #endif
  53 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  54 #include "back-shell/external.h"
  55 #endif
  56 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  57 #include "back-tcl/external.h"
  58 #endif
  59 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  60 #include "back-sql/external.h"
  61 #endif
  62 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
  63 #include "private/external.h"
  64 #endif
  65
  66 static BackendInfo binfo[] = {
  67 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  68         {"bdb", bdb_initialize},
  69 #endif
  70 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  71         {"dnssrv",      dnssrv_back_initialize},
  72 #endif
  73 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  74         {"ldap",        ldap_back_initialize},
  75 #endif
  76 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  77         {"ldbm",        ldbm_back_initialize},
  78 #endif
  79 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  80         {"meta",        meta_back_initialize},
  81 #endif
  82 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  83         {"monitor",     monitor_back_initialize},
  84 #endif
  85 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  86         {"passwd",      passwd_back_initialize},
  87 #endif
  88 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  89         {"perl",        perl_back_initialize},
  90 #endif
  91 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  92         {"shell",       shell_back_initialize},
  93 #endif
  94 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  95         {"tcl",         tcl_back_initialize},
  96 #endif
  97 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  98         {"sql",         sql_back_initialize},
  99 #endif
 100         /* for any private backend */
 101 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
 102         {"private",     private_back_initialize},
 103 #endif
 104         {NULL}
 105 };
 106
 107 int                     nBackendInfo = 0;
 108 BackendInfo     *backendInfo = NULL;
 109
 110 int                     nBackendDB = 0;
 111 BackendDB       *backendDB = NULL;
 112
 113 int backend_init(void)
 114 {
 115         int rc = -1;
 116
 117         if((nBackendInfo != 0) || (backendInfo != NULL)) {
 118                 /* already initialized */
 119 #ifdef NEW_LOGGING
 120                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 121                            "backend_init:  backend already initialized\n" ));
 122 #else
 123                 Debug( LDAP_DEBUG_ANY,
 124                         "backend_init: already initialized.\n", 0, 0, 0 );
 125 #endif
 126                 return -1;
 127         }
 128
 129         for( ;
 130                 binfo[nBackendInfo].bi_type != NULL;
 131                 nBackendInfo++ )
 132         {
 133                 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 134
 135                 if(rc != 0) {
 136 #ifdef NEW_LOGGING
 137                         LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 138                                 "backend_init:  initialized for type \"%s\"\n",
 139                                 binfo[nBackendInfo].bi_type ));
 140 #else
 141                         Debug( LDAP_DEBUG_ANY,
 142                                 "backend_init: initialized for type \"%s\"\n",
 143                                 binfo[nBackendInfo].bi_type, 0, 0 );
 144 #endif
 145                         /* destroy those we've already inited */
 146                         for( nBackendInfo--;
 147                                 nBackendInfo >= 0 ;
 148                                 nBackendInfo-- )
 149                         {
 150                                 if ( binfo[nBackendInfo].bi_destroy ) {
 151                                         binfo[nBackendInfo].bi_destroy(
 152                                                 &binfo[nBackendInfo] );
 153                                 }
 154                         }
 155                         return rc;
 156                 }
 157         }
 158
 159         if ( nBackendInfo > 0) {
 160                 backendInfo = binfo;
 161                 return 0;
 162         }
 163
 164 #ifdef SLAPD_MODULES
 165         return 0;
 166 #else
 167
 168 #ifdef NEW_LOGGING
 169         LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 170                 "backend_init: failed\n" ));
 171 #else
 172         Debug( LDAP_DEBUG_ANY,
 173                 "backend_init: failed\n",
 174                 0, 0, 0 );
 175 #endif
 176
 177         return rc;
 178 #endif /* SLAPD_MODULES */
 179 }
 180
 181 int backend_add(BackendInfo *aBackendInfo)
 182 {
 183    int rc = 0;
 184
 185    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 186 #ifdef NEW_LOGGING
 187        LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 188                   "backend_add:  initialization for type \"%s\" failed\n",
 189                   aBackendInfo->bi_type ));
 190 #else
 191       Debug( LDAP_DEBUG_ANY,
 192              "backend_add: initialization for type \"%s\" failed\n",
 193              aBackendInfo->bi_type, 0, 0 );
 194 #endif
 195       return rc;
 196    }
 197
 198    /* now add the backend type to the Backend Info List */
 199    {
 200       BackendInfo *newBackendInfo = 0;
 201
 202       /* if backendInfo == binfo no deallocation of old backendInfo */
 203       if (backendInfo == binfo) {
 204          newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 205          AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) *
 206                 nBackendInfo);
 207       } else {
 208          newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
 209                                      (nBackendInfo + 1));
 210       }
 211       AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 212              sizeof(BackendInfo));
 213       backendInfo = newBackendInfo;
 214       nBackendInfo++;
 215
 216       return 0;
 217    }
 218 }
 219
 220 int backend_startup(Backend *be)
 221 {
 222         int i;
 223         int rc = 0;
 224
 225         if( ! ( nBackendDB > 0 ) ) {
 226                 /* no databases */
 227 #ifdef NEW_LOGGING
 228                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 229                            "backend_startup: %d databases to startup. \n",
 230                            nBackendDB ));
 231 #else
 232                 Debug( LDAP_DEBUG_ANY,
 233                         "backend_startup: %d databases to startup.\n",
 234                         nBackendDB, 0, 0 );
 235 #endif
 236                 return 1;
 237         }
 238
 239         if(be != NULL) {
 240                 /* startup a specific backend database */
 241 #ifdef NEW_LOGGING
 242                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 243                            "backend_startup:  starting \"%s\"\n",
 244                            be->be_suffix[0] ));
 245 #else
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "backend_startup: starting \"%s\"\n",
 248                         be->be_suffix[0], 0, 0 );
 249 #endif
 250
 251                 if ( be->bd_info->bi_open ) {
 252                         rc = be->bd_info->bi_open( be->bd_info );
 253                 }
 254
 255                 if(rc != 0) {
 256 #ifdef NEW_LOGGING
 257                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 258                                    "backend_startup: bi_open failed!\n" ));
 259 #else
 260                         Debug( LDAP_DEBUG_ANY,
 261                                 "backend_startup: bi_open failed!\n",
 262                                 0, 0, 0 );
 263 #endif
 264
 265                         return rc;
 266                 }
 267
 268                 if ( be->bd_info->bi_db_open ) {
 269                         rc = be->bd_info->bi_db_open( be );
 270                 }
 271
 272                 if(rc != 0) {
 273 #ifdef NEW_LOGGING
 274                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 275                                    "backend_startup: bi_db_open failed!\n" ));
 276 #else
 277                         Debug( LDAP_DEBUG_ANY,
 278                                 "backend_startup: bi_db_open failed!\n",
 279                                 0, 0, 0 );
 280 #endif
 281                         return rc;
 282                 }
 283
 284                 return rc;
 285         }
 286
 287         /* open each backend type */
 288         for( i = 0; i < nBackendInfo; i++ ) {
 289                 if( backendInfo[i].bi_nDB == 0) {
 290                         /* no database of this type, don't open */
 291                         continue;
 292                 }
 293
 294                 if( backendInfo[i].bi_open ) {
 295                         rc = backendInfo[i].bi_open(
 296                                 &backendInfo[i] );
 297                 }
 298
 299                 if(rc != 0) {
 300 #ifdef NEW_LOGGING
 301                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 302                                    "backend_startup: bi_open %d failed!\n", i ));
 303 #else
 304                         Debug( LDAP_DEBUG_ANY,
 305                                 "backend_startup: bi_open %d failed!\n",
 306                                 i, 0, 0 );
 307 #endif
 308                         return rc;
 309                 }
 310         }
 311
 312         /* open each backend database */
 313         for( i = 0; i < nBackendDB; i++ ) {
 314                 /* append global access controls */
 315                 acl_append( &backendDB[i].be_acl, global_acl );
 316
 317                 if ( backendDB[i].bd_info->bi_db_open ) {
 318                         rc = backendDB[i].bd_info->bi_db_open(
 319                                 &backendDB[i] );
 320                 }
 321
 322                 if(rc != 0) {
 323 #ifdef NEW_LOGGING
 324                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 325                                    "backend_startup: bi_db_open %d failed!\n", i ));
 326 #else
 327                         Debug( LDAP_DEBUG_ANY,
 328                                 "backend_startup: bi_db_open %d failed!\n",
 329                                 i, 0, 0 );
 330 #endif
 331                         return rc;
 332                 }
 333         }
 334
 335         return rc;
 336 }
 337
 338 int backend_num( Backend *be )
 339 {
 340         int i;
 341
 342         if( be == NULL ) return -1;
 343
 344         for( i = 0; i < nBackendDB; i++ ) {
 345                 if( be == &backendDB[i] ) return i;
 346         }
 347         return -1;
 348 }
 349
 350 int backend_shutdown( Backend *be )
 351 {
 352         int i;
 353         int rc = 0;
 354
 355         if( be != NULL ) {
 356                 /* shutdown a specific backend database */
 357
 358                 if ( be->bd_info->bi_nDB == 0 ) {
 359                         /* no database of this type, we never opened it */
 360                         return 0;
 361                 }
 362
 363                 if ( be->bd_info->bi_db_close ) {
 364                         be->bd_info->bi_db_close( be );
 365                 }
 366
 367                 if( be->bd_info->bi_close ) {
 368                         be->bd_info->bi_close( be->bd_info );
 369                 }
 370
 371                 return 0;
 372         }
 373
 374         /* close each backend database */
 375         for( i = 0; i < nBackendDB; i++ ) {
 376                 if ( backendDB[i].bd_info->bi_db_close ) {
 377                         backendDB[i].bd_info->bi_db_close(
 378                                 &backendDB[i] );
 379                 }
 380
 381                 if(rc != 0) {
 382 #ifdef NEW_LOGGING
 383                         LDAP_LOG(( "backend", LDAP_LEVEL_NOTICE,
 384                                    "backend_shutdown: bi_close %s failed!\n",
 385                                    backendDB[i].be_type ));
 386 #else
 387                         Debug( LDAP_DEBUG_ANY,
 388                                 "backend_close: bi_close %s failed!\n",
 389                                 backendDB[i].be_type, 0, 0 );
 390 #endif
 391                 }
 392         }
 393
 394         /* close each backend type */
 395         for( i = 0; i < nBackendInfo; i++ ) {
 396                 if( backendInfo[i].bi_nDB == 0 ) {
 397                         /* no database of this type */
 398                         continue;
 399                 }
 400
 401                 if( backendInfo[i].bi_close ) {
 402                         backendInfo[i].bi_close(
 403                                 &backendInfo[i] );
 404                 }
 405         }
 406
 407         return 0;
 408 }
 409
 410 int backend_destroy(void)
 411 {
 412         int i;
 413
 414         /* destroy each backend database */
 415         for( i = 0; i < nBackendDB; i++ ) {
 416                 if ( backendDB[i].bd_info->bi_db_destroy ) {
 417                         backendDB[i].bd_info->bi_db_destroy(
 418                                 &backendDB[i] );
 419                 }
 420         }
 421
 422         /* destroy each backend type */
 423         for( i = 0; i < nBackendInfo; i++ ) {
 424                 if( backendInfo[i].bi_destroy ) {
 425                         backendInfo[i].bi_destroy(
 426                                 &backendInfo[i] );
 427                 }
 428         }
 429
 430 #ifdef SLAPD_MODULES
 431         if (backendInfo != binfo) {
 432            free(backendInfo);
 433         }
 434 #endif /* SLAPD_MODULES */
 435
 436         nBackendInfo = 0;
 437         backendInfo = NULL;
 438
 439         return 0;
 440 }
 441
 442 BackendInfo* backend_info(const char *type)
 443 {
 444         int i;
 445
 446         /* search for the backend type */
 447         for( i = 0; i < nBackendInfo; i++ ) {
 448                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 449                         return &backendInfo[i];
 450                 }
 451         }
 452
 453         return NULL;
 454 }
 455
 456
 457 BackendDB *
 458 backend_db_init(
 459     const char  *type
 460 )
 461 {
 462         Backend *be;
 463         BackendInfo *bi = backend_info(type);
 464         int     rc = 0;
 465
 466         if( bi == NULL ) {
 467                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 468                 return NULL;
 469         }
 470
 471         backendDB = (BackendDB *) ch_realloc(
 472                         (char *) backendDB,
 473                     (nBackendDB + 1) * sizeof(Backend) );
 474
 475         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 476
 477         be = &backends[nbackends++];
 478
 479         be->bd_info = bi;
 480         be->be_def_limit = deflimit;
 481         be->be_dfltaccess = global_default_access;
 482
 483         be->be_restrictops = global_restrictops;
 484         be->be_requires = global_requires;
 485
 486         /* assign a default depth limit for alias deref */
 487         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 488
 489         if(bi->bi_db_init) {
 490                 rc = bi->bi_db_init( be );
 491         }
 492
 493         if(rc != 0) {
 494                 fprintf( stderr, "database init failed (%s)\n", type );
 495                 nbackends--;
 496                 return NULL;
 497         }
 498
 499         bi->bi_nDB++;
 500         return( be );
 501 }
 502
 503 void
 504 be_db_close( void )
 505 {
 506         int     i;
 507
 508         for ( i = 0; i < nbackends; i++ ) {
 509                 if ( backends[i].bd_info->bi_db_close ) {
 510                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 511                 }
 512         }
 513 }
 514
 515 Backend *
 516 select_backend(
 517         const char * dn,
 518         int manageDSAit,
 519         int noSubs )
 520 {
 521         int     i, j, len, dnlen;
 522         Backend *be = NULL;
 523
 524         dnlen = strlen( dn );
 525         for ( i = 0; i < nbackends; i++ ) {
 526                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 527                     backends[i].be_nsuffix[j] != NULL; j++ )
 528                 {
 529                         if ((backends[i].be_glueflags&SLAP_GLUE_SUBORDINATE)&&
 530                                 noSubs)
 531                                 continue;
 532
 533                         len = backends[i].be_nsuffix[j]->bv_len;
 534
 535                         if ( len > dnlen ) {
 536                                 /* suffix is longer than DN */
 537                                 continue;
 538                         }
 539
 540
 541                         if ( len && len < dnlen && ( !DN_SEPARATOR( dn[(dnlen-len)-1] ) || DN_ESCAPE( dn[(dnlen-len)-2] ) ) ) {
 542                                 /* make sure we have a separator */
 543                                 continue;
 544                         }
 545
 546
 547                         if ( strcmp( backends[i].be_nsuffix[j]->bv_val, &dn[dnlen-len] ) == 0 ) {
 548                                 if( be == NULL ) {
 549                                         be = &backends[i];
 550
 551                                         if( manageDSAit && len == dnlen ) {
 552                                                 continue;
 553                                         }
 554                                 } else {
 555                                         be = &backends[i];
 556                                 }
 557                                 return be;
 558                         }
 559                 }
 560         }
 561
 562         return be;
 563 }
 564
 565 int
 566 be_issuffix(
 567     Backend     *be,
 568     const char  *suffix
 569 )
 570 {
 571         int     i;
 572         size_t len = strlen(suffix);
 573
 574         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
 575                 if ( len != be->be_nsuffix[i]->bv_len ) {
 576                         continue;
 577                 }
 578                 if ( strcmp( be->be_nsuffix[i]->bv_val, suffix ) == 0 ) {
 579                         return( 1 );
 580                 }
 581         }
 582
 583         return( 0 );
 584 }
 585
 586 int
 587 be_isroot( Backend *be, const char *ndn )
 588 {
 589         int rc;
 590
 591         if ( ndn == NULL || *ndn == '\0' ) {
 592                 return( 0 );
 593         }
 594
 595         if ( be->be_root_ndn == NULL || *be->be_root_ndn == '\0' ) {
 596                 return( 0 );
 597         }
 598
 599         rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
 600
 601         return(rc);
 602 }
 603
 604 int
 605 be_isupdate( Backend *be, const char *ndn )
 606 {
 607         int rc;
 608
 609         if ( ndn == NULL || *ndn == '\0' ) {
 610                 return( 0 );
 611         }
 612
 613         if ( be->be_update_ndn == NULL || *be->be_update_ndn == '\0' ) {
 614                 return( 0 );
 615         }
 616
 617         rc = strcmp( be->be_update_ndn, ndn ) ? 0 : 1;
 618
 619         return(rc);
 620 }
 621
 622 char *
 623 be_root_dn( Backend *be )
 624 {
 625         if ( be->be_root_dn == NULL ) {
 626                 return( "" );
 627         }
 628
 629         return be->be_root_dn;
 630 }
 631
 632 int
 633 be_isroot_pw( Backend *be,
 634         Connection *conn,
 635         const char *ndn,
 636         struct berval *cred )
 637 {
 638         int result;
 639
 640         if ( ! be_isroot( be, ndn ) ) {
 641                 return 0;
 642         }
 643
 644         if( be->be_root_pw.bv_len == 0 ) {
 645                 return 0;
 646         }
 647
 648 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 649         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 650 #ifdef SLAPD_SPASSWD
 651         lutil_passwd_sasl_conn = conn->c_sasl_context;
 652 #endif
 653 #endif
 654
 655         result = lutil_passwd( &be->be_root_pw, cred, NULL );
 656
 657 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 658 #ifdef SLAPD_SPASSWD
 659         lutil_passwd_sasl_conn = NULL;
 660 #endif
 661         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 662 #endif
 663
 664         return result == 0;
 665 }
 666
 667 int
 668 be_entry_release_rw(
 669         BackendDB *be,
 670         Connection *conn,
 671         Operation *op,
 672         Entry *e,
 673         int rw )
 674 {
 675         if ( be->be_release ) {
 676                 /* free and release entry from backend */
 677                 return be->be_release( be, conn, op, e, rw );
 678         } else {
 679                 /* free entry */
 680                 entry_free( e );
 681                 return 0;
 682         }
 683 }
 684
 685 int
 686 backend_unbind(
 687         Connection   *conn,
 688         Operation    *op
 689 )
 690 {
 691         int     i;
 692
 693         for ( i = 0; i < nbackends; i++ ) {
 694                 if ( backends[i].be_unbind ) {
 695                         (*backends[i].be_unbind)( &backends[i], conn, op );
 696                 }
 697         }
 698
 699         return 0;
 700 }
 701
 702 int
 703 backend_connection_init(
 704         Connection   *conn
 705 )
 706 {
 707         int     i;
 708
 709         for ( i = 0; i < nbackends; i++ ) {
 710                 if ( backends[i].be_connection_init ) {
 711                         (*backends[i].be_connection_init)( &backends[i], conn);
 712                 }
 713         }
 714
 715         return 0;
 716 }
 717
 718 int
 719 backend_connection_destroy(
 720         Connection   *conn
 721 )
 722 {
 723         int     i;
 724
 725         for ( i = 0; i < nbackends; i++ ) {
 726                 if ( backends[i].be_connection_destroy ) {
 727                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 728                 }
 729         }
 730
 731         return 0;
 732 }
 733
 734 static int
 735 backend_check_controls(
 736         Backend *be,
 737         Connection *conn,
 738         Operation *op,
 739         const char **text )
 740 {
 741         LDAPControl **ctrls;
 742         ctrls = op->o_ctrls;
 743         if( ctrls == NULL ) {
 744                 return LDAP_SUCCESS;
 745         }
 746
 747         for( ; *ctrls != NULL ; ctrls++ ) {
 748                 if( (*ctrls)->ldctl_iscritical &&
 749                         !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 750                 {
 751                         *text = "control unavailable in NamingContext";
 752                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 753                 }
 754         }
 755
 756         return LDAP_SUCCESS;
 757 }
 758
 759 int
 760 backend_check_restrictions(
 761         Backend *be,
 762         Connection *conn,
 763         Operation *op,
 764         const void *opdata,
 765         const char **text )
 766 {
 767         int rc;
 768         slap_mask_t restrictops;
 769         slap_mask_t requires;
 770         slap_mask_t opflag;
 771         slap_ssf_set_t *ssf;
 772         int updateop = 0;
 773
 774         if( be ) {
 775                 rc = backend_check_controls( be, conn, op, text );
 776
 777                 if( rc != LDAP_SUCCESS ) {
 778                         return rc;
 779                 }
 780
 781                 restrictops = be->be_restrictops;
 782                 requires = be->be_requires;
 783                 ssf = &be->be_ssf_set;
 784
 785         } else {
 786                 restrictops = global_restrictops;
 787                 requires = global_requires;
 788                 ssf = &global_ssf_set;
 789         }
 790
 791         switch( op->o_tag ) {
 792         case LDAP_REQ_ADD:
 793                 opflag = SLAP_RESTRICT_OP_ADD;
 794                 updateop++;
 795                 break;
 796         case LDAP_REQ_BIND:
 797                 opflag = SLAP_RESTRICT_OP_BIND;
 798                 break;
 799         case LDAP_REQ_COMPARE:
 800                 opflag = SLAP_RESTRICT_OP_COMPARE;
 801                 break;
 802         case LDAP_REQ_DELETE:
 803                 updateop++;
 804                 opflag = SLAP_RESTRICT_OP_DELETE;
 805                 break;
 806         case LDAP_REQ_EXTENDED:
 807                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 808                 break;
 809         case LDAP_REQ_MODIFY:
 810                 updateop++;
 811                 opflag = SLAP_RESTRICT_OP_MODIFY;
 812                 break;
 813         case LDAP_REQ_RENAME:
 814                 updateop++;
 815                 opflag = SLAP_RESTRICT_OP_RENAME;
 816                 break;
 817         case LDAP_REQ_SEARCH:
 818                 opflag = SLAP_RESTRICT_OP_SEARCH;
 819                 break;
 820         case LDAP_REQ_UNBIND:
 821                 opflag = 0;
 822                 break;
 823         default:
 824                 *text = "restrict operations internal error";
 825                 return LDAP_OTHER;
 826         }
 827
 828         if ( op->o_tag != LDAP_REQ_EXTENDED
 829                 || strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) )
 830         {
 831                 /* these checks don't apply to StartTLS */
 832
 833                 if( op->o_tag == LDAP_REQ_EXTENDED ) {
 834                         /* threat other extended operations as update ops */
 835                         updateop++;
 836                 }
 837
 838                 if( op->o_transport_ssf < ssf->sss_transport ) {
 839                         *text = "transport confidentiality required";
 840                         return LDAP_CONFIDENTIALITY_REQUIRED;
 841                 }
 842
 843                 if( op->o_tls_ssf < ssf->sss_tls ) {
 844                         *text = "TLS confidentiality required";
 845                         return LDAP_CONFIDENTIALITY_REQUIRED;
 846                 }
 847
 848                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 849                         /* these checks don't apply to SASL bind */
 850
 851                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 852                                 *text = "SASL confidentiality required";
 853                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 854                         }
 855
 856                         if( op->o_ssf < ssf->sss_ssf ) {
 857                                 *text = "confidentiality required";
 858                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 859                         }
 860                 }
 861
 862                 if( updateop ) {
 863                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 864                                 *text = "transport update confidentiality required";
 865                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 866                         }
 867
 868                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 869                                 *text = "TLS update confidentiality required";
 870                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 871                         }
 872
 873                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 874                                 *text = "SASL update confidentiality required";
 875                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 876                         }
 877
 878                         if( op->o_ssf < ssf->sss_update_ssf ) {
 879                                 *text = "update confidentiality required";
 880                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 881                         }
 882
 883                         if( op->o_ndn == NULL ) {
 884                                 *text = "modifications require authentication";
 885                                 return LDAP_OPERATIONS_ERROR;
 886                         }
 887                 }
 888         }
 889
 890         if ( op->o_tag != LDAP_REQ_BIND && ( op->o_tag != LDAP_REQ_EXTENDED ||
 891                 strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) ) )
 892         {
 893                 /* these checks don't apply to Bind or StartTLS */
 894
 895                 if( requires & SLAP_REQUIRE_STRONG ) {
 896                         /* should check mechanism */
 897                         if( op->o_authmech == NULL ||
 898                                 op->o_dn == NULL || *op->o_dn == '\0' )
 899                         {
 900                                 *text = "strong authentication required";
 901                                 return LDAP_STRONG_AUTH_REQUIRED;
 902                         }
 903                 }
 904
 905                 if( requires & SLAP_REQUIRE_SASL ) {
 906                         if( op->o_authmech == NULL ||
 907                                 op->o_dn == NULL || *op->o_dn == '\0' )
 908                         {
 909                                 *text = "SASL authentication required";
 910                                 return LDAP_STRONG_AUTH_REQUIRED;
 911                         }
 912                 }
 913
 914                 if( requires & SLAP_REQUIRE_AUTHC ) {
 915                         if( op->o_dn == NULL || *op->o_dn == '\0' ) {
 916                                 *text = "authentication required";
 917                                 return LDAP_UNWILLING_TO_PERFORM;
 918                         }
 919                 }
 920
 921                 if( requires & SLAP_REQUIRE_BIND ) {
 922                         int version;
 923                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 924                         version = conn->c_protocol;
 925                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 926
 927                         if( !version ) {
 928                                 /* no bind has occurred */
 929                                 *text = "BIND required";
 930                                 return LDAP_OPERATIONS_ERROR;
 931                         }
 932                 }
 933
 934                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 935                         if( op->o_protocol < LDAP_VERSION3 ) {
 936                                 /* no bind has occurred */
 937                                 *text = "operation restricted to LDAPv3 clients";
 938                                 return LDAP_OPERATIONS_ERROR;
 939                         }
 940                 }
 941         }
 942
 943         if( restrictops & opflag ) {
 944                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 945                         *text = "read operations restricted";
 946                 } else {
 947                         *text = "operation restricted";
 948                 }
 949                 return LDAP_UNWILLING_TO_PERFORM;
 950         }
 951
 952         return LDAP_SUCCESS;
 953 }
 954
 955 int backend_check_referrals(
 956         Backend *be,
 957         Connection *conn,
 958         Operation *op,
 959         const char *dn,
 960         const char *ndn )
 961 {
 962         int rc = LDAP_SUCCESS;
 963
 964         if( be->be_chk_referrals ) {
 965                 const char *text;
 966
 967                 rc = be->be_chk_referrals( be,
 968                         conn, op, dn, ndn, &text );
 969
 970                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 971                         send_ldap_result( conn, op, rc,
 972                                 NULL, text, NULL, NULL );
 973                 }
 974         }
 975
 976         return rc;
 977 }
 978
 979 int
 980 backend_group(
 981         Backend *be,
 982         Connection *conn,
 983         Operation *op,
 984         Entry   *target,
 985         const char      *gr_ndn,
 986         const char      *op_ndn,
 987         ObjectClass *group_oc,
 988         AttributeDescription *group_at
 989 )
 990 {
 991         GroupAssertion *g;
 992         int len = strlen(gr_ndn);
 993         int i;
 994
 995         ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 996         i = op->o_abandon;
 997         ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 998         if (i)
 999                 return SLAPD_ABANDON;
1000
1001         if( strcmp( target->e_ndn, gr_ndn ) != 0 ) {
1002                 /* we won't attempt to send it to a different backend */
1003
1004                 be = select_backend(gr_ndn, 0,
1005                         (be->be_glueflags & SLAP_GLUE_INSTANCE));
1006
1007                 if (be == NULL) {
1008                         return LDAP_NO_SUCH_OBJECT;
1009                 }
1010         }
1011
1012         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1013         for (g = conn->c_groups; g; g=g->next) {
1014                 if (g->be != be || g->oc != group_oc || g->at != group_at ||
1015                     g->len != len)
1016                         continue;
1017                 if (strcmp( g->ndn, gr_ndn ) == 0)
1018                         break;
1019         }
1020         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1021         if (g)
1022                 return g->res;
1023
1024         if( be->be_group ) {
1025                 int res = be->be_group( be, conn, op,
1026                         target, gr_ndn, op_ndn,
1027                         group_oc, group_at );
1028
1029                 if (op->o_tag != LDAP_REQ_BIND) {
1030                         g = ch_malloc(sizeof(GroupAssertion) + len);
1031                         g->be = be;
1032                         g->oc = group_oc;
1033                         g->at = group_at;
1034                         g->res = res;
1035                         g->len = len;
1036                         strcpy(g->ndn, gr_ndn);
1037                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1038                         g->next = conn->c_groups;
1039                         conn->c_groups = g;
1040                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1041                 }
1042
1043                 return res;
1044         }
1045
1046         return LDAP_UNWILLING_TO_PERFORM;
1047 }
1048
1049 int
1050 backend_attribute(
1051         Backend *be,
1052         Connection *conn,
1053         Operation *op,
1054         Entry   *target,
1055         const char      *e_ndn,
1056         AttributeDescription *entry_at,
1057         struct berval ***vals
1058 )
1059 {
1060         if( target == NULL || strcmp( target->e_ndn, e_ndn ) != 0 ) {
1061                 /* we won't attempt to send it to a different backend */
1062
1063                 be = select_backend(e_ndn, 0,
1064                         (be->be_glueflags & SLAP_GLUE_INSTANCE));
1065
1066                 if (be == NULL) {
1067                         return LDAP_NO_SUCH_OBJECT;
1068                 }
1069         }
1070
1071         if( be->be_attribute ) {
1072                 return be->be_attribute( be, conn, op, target, e_ndn,
1073                         entry_at, vals );
1074         }
1075
1076         return LDAP_UNWILLING_TO_PERFORM;
1077 }
1078
1079 Attribute *backend_operational(
1080         Backend *be,
1081         Connection *conn,
1082         Operation *op,
1083         Entry *e )
1084 {
1085         Attribute *a = NULL;
1086
1087 #ifdef SLAPD_SCHEMA_DN
1088         a = ch_malloc( sizeof( Attribute ) );
1089         a->a_desc = slap_schema.si_ad_subschemaSubentry;
1090
1091         /* Should be backend specific */
1092         a->a_vals = ch_malloc( 2 * sizeof( struct berval * ) );
1093         a->a_vals[0] = ber_bvstrdup( SLAPD_SCHEMA_DN );
1094         a->a_vals[1] = NULL;
1095
1096         a->a_next = NULL;
1097 #endif
1098
1099         return a;
1100 }