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                                 /* suffix is longer than DN */
 513                                 continue;
 514                         }
 515
 516
 517                         if ( (len < dnlen) && !(DN_SEPARATOR( dn[(dnlen-len)-1] )) ) {
 518                                 /* make sure we have a separator */
 519                                 continue;
 520                         }
 521
 522
 523                         if ( strcmp( backends[i].be_nsuffix[j], &dn[dnlen-len] ) == 0 ) {
 524                                 if( be == NULL ) {
 525                                         be = &backends[i];
 526
 527                                         if( manageDSAit && len == dnlen ) {
 528                                                 continue;
 529                                         }
 530                                 } else {
 531                                         be = &backends[i];
 532                                 }
 533                                 return be;
 534                         }
 535                 }
 536         }
 537
 538         return be;
 539 }
 540
 541 int
 542 be_issuffix(
 543     Backend     *be,
 544     const char  *suffix
 545 )
 546 {
 547         int     i;
 548
 549         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
 550                 if ( strcmp( be->be_nsuffix[i], suffix ) == 0 ) {
 551                         return( 1 );
 552                 }
 553         }
 554
 555         return( 0 );
 556 }
 557
 558 int
 559 be_isroot( Backend *be, const char *ndn )
 560 {
 561         int rc;
 562
 563         if ( ndn == NULL || *ndn == '\0' ) {
 564                 return( 0 );
 565         }
 566
 567         if ( be->be_root_ndn == NULL || *be->be_root_ndn == '\0' ) {
 568                 return( 0 );
 569         }
 570
 571         rc = strcmp( be->be_root_ndn, ndn ) ? 0 : 1;
 572
 573         return(rc);
 574 }
 575
 576 char *
 577 be_root_dn( Backend *be )
 578 {
 579         if ( be->be_root_dn == NULL ) {
 580                 return( "" );
 581         }
 582
 583         return be->be_root_dn;
 584 }
 585
 586 int
 587 be_isroot_pw( Backend *be,
 588         Connection *conn,
 589         const char *ndn,
 590         struct berval *cred )
 591 {
 592         int result;
 593
 594         if ( ! be_isroot( be, ndn ) ) {
 595                 return 0;
 596         }
 597
 598         if( be->be_root_pw.bv_len == 0 ) {
 599                 return 0;
 600         }
 601
 602 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 603         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 604 #ifdef SLAPD_SPASSWD
 605         lutil_passwd_sasl_conn = conn->c_sasl_context;
 606 #endif
 607 #endif
 608
 609         result = lutil_passwd( &be->be_root_pw, cred, NULL );
 610
 611 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 612 #ifdef SLAPD_SPASSWD
 613         lutil_passwd_sasl_conn = NULL;
 614 #endif
 615         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 616 #endif
 617
 618         return result == 0;
 619 }
 620
 621 int
 622 be_entry_release_rw(
 623         BackendDB *be,
 624         Connection *conn,
 625         Operation *op,
 626         Entry *e,
 627         int rw )
 628 {
 629         if ( be->be_release ) {
 630                 /* free and release entry from backend */
 631                 return be->be_release( be, conn, op, e, rw );
 632         } else {
 633                 /* free entry */
 634                 entry_free( e );
 635                 return 0;
 636         }
 637 }
 638
 639 int
 640 backend_unbind(
 641         Connection   *conn,
 642         Operation    *op
 643 )
 644 {
 645         int     i;
 646
 647         for ( i = 0; i < nbackends; i++ ) {
 648                 if ( backends[i].be_unbind ) {
 649                         (*backends[i].be_unbind)( &backends[i], conn, op );
 650                 }
 651         }
 652
 653         return 0;
 654 }
 655
 656 int
 657 backend_connection_init(
 658         Connection   *conn
 659 )
 660 {
 661         int     i;
 662
 663         for ( i = 0; i < nbackends; i++ ) {
 664                 if ( backends[i].be_connection_init ) {
 665                         (*backends[i].be_connection_init)( &backends[i], conn);
 666                 }
 667         }
 668
 669         return 0;
 670 }
 671
 672 int
 673 backend_connection_destroy(
 674         Connection   *conn
 675 )
 676 {
 677         int     i;
 678
 679         for ( i = 0; i < nbackends; i++ ) {
 680                 if ( backends[i].be_connection_destroy ) {
 681                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 682                 }
 683         }
 684
 685         return 0;
 686 }
 687
 688 static int
 689 backend_check_controls(
 690         Backend *be,
 691         Connection *conn,
 692         Operation *op,
 693         const char **text )
 694 {
 695         LDAPControl **ctrls;
 696         ctrls = op->o_ctrls;
 697         if( ctrls == NULL ) {
 698                 return LDAP_SUCCESS;
 699         }
 700
 701         for( ; *ctrls != NULL ; ctrls++ ) {
 702                 if( (*ctrls)->ldctl_iscritical &&
 703                         !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 704                 {
 705                         *text = "control unavailable in NamingContext";
 706                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 707                 }
 708         }
 709
 710         return LDAP_SUCCESS;
 711 }
 712
 713 int
 714 backend_check_restrictions(
 715         Backend *be,
 716         Connection *conn,
 717         Operation *op,
 718         const void *opdata,
 719         const char **text )
 720 {
 721         int rc;
 722         slap_mask_t restrictops;
 723         slap_mask_t requires;
 724         slap_mask_t opflag;
 725         slap_ssf_set_t *ssf;
 726         int updateop = 0;
 727
 728         if( be ) {
 729                 rc = backend_check_controls( be, conn, op, text );
 730
 731                 if( rc != LDAP_SUCCESS ) {
 732                         return rc;
 733                 }
 734
 735                 restrictops = be->be_restrictops;
 736                 requires = be->be_requires;
 737                 ssf = &be->be_ssf_set;
 738
 739         } else {
 740                 restrictops = global_restrictops;
 741                 requires = global_requires;
 742                 ssf = &global_ssf_set;
 743         }
 744
 745         switch( op->o_tag ) {
 746         case LDAP_REQ_ADD:
 747                 opflag = SLAP_RESTRICT_OP_ADD;
 748                 updateop++;
 749                 break;
 750         case LDAP_REQ_BIND:
 751                 opflag = SLAP_RESTRICT_OP_BIND;
 752                 break;
 753         case LDAP_REQ_COMPARE:
 754                 opflag = SLAP_RESTRICT_OP_COMPARE;
 755                 break;
 756         case LDAP_REQ_DELETE:
 757                 updateop++;
 758                 opflag = SLAP_RESTRICT_OP_DELETE;
 759                 break;
 760         case LDAP_REQ_EXTENDED:
 761                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 762                 break;
 763         case LDAP_REQ_MODIFY:
 764                 updateop++;
 765                 opflag = SLAP_RESTRICT_OP_MODIFY;
 766                 break;
 767         case LDAP_REQ_RENAME:
 768                 updateop++;
 769                 opflag = SLAP_RESTRICT_OP_RENAME;
 770                 break;
 771         case LDAP_REQ_SEARCH:
 772                 opflag = SLAP_RESTRICT_OP_SEARCH;
 773                 break;
 774         case LDAP_REQ_UNBIND:
 775                 opflag = 0;
 776                 break;
 777         default:
 778                 *text = "restrict operations internal error";
 779                 return LDAP_OTHER;
 780         }
 781
 782         if ( op->o_tag != LDAP_REQ_EXTENDED
 783                 || strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) )
 784         {
 785                 /* these checks don't apply to StartTLS */
 786
 787                 if( op->o_tag == LDAP_REQ_EXTENDED ) {
 788                         /* threat other extended operations as update ops */
 789                         updateop++;
 790                 }
 791
 792                 if( op->o_transport_ssf < ssf->sss_transport ) {
 793                         *text = "transport confidentiality required";
 794                         return LDAP_CONFIDENTIALITY_REQUIRED;
 795                 }
 796
 797                 if( op->o_tls_ssf < ssf->sss_tls ) {
 798                         *text = "TLS confidentiality required";
 799                         return LDAP_CONFIDENTIALITY_REQUIRED;
 800                 }
 801
 802                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 803                         /* these checks don't apply to SASL bind */
 804
 805                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 806                                 *text = "SASL confidentiality required";
 807                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 808                         }
 809
 810                         if( op->o_ssf < ssf->sss_ssf ) {
 811                                 *text = "confidentiality required";
 812                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 813                         }
 814                 }
 815
 816                 if( updateop ) {
 817                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 818                                 *text = "transport update confidentiality required";
 819                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 820                         }
 821
 822                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 823                                 *text = "TLS update confidentiality required";
 824                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 825                         }
 826
 827                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 828                                 *text = "SASL update confidentiality required";
 829                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 830                         }
 831
 832                         if( op->o_ssf < ssf->sss_update_ssf ) {
 833                                 *text = "update confidentiality required";
 834                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 835                         }
 836                 }
 837         }
 838
 839         if ( op->o_tag != LDAP_REQ_BIND && ( op->o_tag != LDAP_REQ_EXTENDED ||
 840                 strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) ) )
 841         {
 842                 /* these checks don't apply to Bind or StartTLS */
 843
 844                 if( requires & SLAP_REQUIRE_STRONG ) {
 845                         /* should check mechanism */
 846                         if( op->o_authmech == NULL ||
 847                                 op->o_dn == NULL || *op->o_dn == '\0' )
 848                         {
 849                                 *text = "strong authentication required";
 850                                 return LDAP_STRONG_AUTH_REQUIRED;
 851                         }
 852                 }
 853
 854                 if( requires & SLAP_REQUIRE_SASL ) {
 855                         if( op->o_authmech == NULL ||
 856                                 op->o_dn == NULL || *op->o_dn == '\0' )
 857                         {
 858                                 *text = "SASL authentication required";
 859                                 return LDAP_STRONG_AUTH_REQUIRED;
 860                         }
 861                 }
 862
 863                 if( requires & SLAP_REQUIRE_AUTHC ) {
 864                         if( op->o_dn == NULL || *op->o_dn == '\0' ) {
 865                                 *text = "authentication required";
 866                                 return LDAP_UNWILLING_TO_PERFORM;
 867                         }
 868                 }
 869
 870                 if( requires & SLAP_REQUIRE_BIND ) {
 871                         int version;
 872                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 873                         version = conn->c_protocol;
 874                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 875
 876                         if( !version ) {
 877                                 /* no bind has occurred */
 878                                 *text = "BIND required";
 879                                 return LDAP_OPERATIONS_ERROR;
 880                         }
 881                 }
 882
 883                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 884                         if( op->o_protocol < LDAP_VERSION3 ) {
 885                                 /* no bind has occurred */
 886                                 *text = "operation restricted to LDAPv3 clients";
 887                                 return LDAP_OPERATIONS_ERROR;
 888                         }
 889                 }
 890         }
 891
 892         if( restrictops & opflag ) {
 893                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 894                         *text = "read operations restricted";
 895                 } else {
 896                         *text = "operation restricted";
 897                 }
 898                 return LDAP_UNWILLING_TO_PERFORM;
 899         }
 900
 901         return LDAP_SUCCESS;
 902 }
 903
 904 int backend_check_referrals(
 905         Backend *be,
 906         Connection *conn,
 907         Operation *op,
 908         const char *dn,
 909         const char *ndn )
 910 {
 911         int rc = LDAP_SUCCESS;
 912
 913         if( be->be_chk_referrals ) {
 914                 const char *text;
 915
 916                 rc = be->be_chk_referrals( be,
 917                         conn, op, dn, ndn, &text );
 918
 919                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 920                         send_ldap_result( conn, op, rc,
 921                                 NULL, text, NULL, NULL );
 922                 }
 923         }
 924
 925         return rc;
 926 }
 927
 928 int
 929 backend_group(
 930         Backend *be,
 931         Connection *conn,
 932         Operation *op,
 933         Entry   *target,
 934         const char      *gr_ndn,
 935         const char      *op_ndn,
 936         ObjectClass *group_oc,
 937         AttributeDescription *group_at
 938 )
 939 {
 940         if( strcmp( target->e_ndn, gr_ndn ) != 0 ) {
 941                 /* we won't attempt to send it to a different backend */
 942
 943                 be = select_backend(gr_ndn, 0);
 944
 945                 if (be == NULL) {
 946                         return LDAP_NO_SUCH_OBJECT;
 947                 }
 948         }
 949
 950         if( be->be_group ) {
 951                 return be->be_group( be, conn, op,
 952                         target, gr_ndn, op_ndn,
 953                         group_oc, group_at );
 954         }
 955
 956         return LDAP_UNWILLING_TO_PERFORM;
 957 }
 958
 959 int
 960 backend_attribute(
 961         Backend *be,
 962         Connection *conn,
 963         Operation *op,
 964         Entry   *target,
 965         const char      *e_ndn,
 966         AttributeDescription *entry_at,
 967         struct berval ***vals
 968 )
 969 {
 970         if( target == NULL || strcmp( target->e_ndn, e_ndn ) != 0 ) {
 971                 /* we won't attempt to send it to a different backend */
 972
 973                 be = select_backend(e_ndn, 0);
 974
 975                 if (be == NULL) {
 976                         return LDAP_NO_SUCH_OBJECT;
 977                 }
 978         }
 979
 980         if( be->be_attribute ) {
 981                 return be->be_attribute( be, conn, op, target, e_ndn,
 982                         entry_at, vals );
 983         }
 984
 985         return LDAP_UNWILLING_TO_PERFORM;
 986 }
 987
 988 Attribute *backend_operational(
 989         Backend *be,
 990         Connection *conn,
 991         Operation *op,
 992         Entry *e )
 993 {
 994         Attribute *a = NULL;
 995
 996 #ifdef SLAPD_SCHEMA_DN
 997         a = ch_malloc( sizeof( Attribute ) );
 998         a->a_desc = ad_dup( slap_schema.si_ad_subschemaSubentry );
 999
1000         /* Should be backend specific */
1001         a->a_vals = ch_malloc( 2 * sizeof( struct berval * ) );
1002         a->a_vals[0] = ber_bvstrdup( SLAPD_SCHEMA_DN );
1003         a->a_vals[1] = NULL;
1004
1005         a->a_next = NULL;
1006 #endif
1007
1008         return a;
1009 }