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