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