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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /* backend.c - routines for dealing with back-end databases */
   7
   8
   9 #include "portable.h"
  10
  11 #include <stdio.h>
  12
  13 #include <ac/string.h>
  14 #include <ac/socket.h>
  15
  16 #include <sys/stat.h>
  17
  18 #include "slap.h"
  19 #include "lutil.h"
  20
  21 /*
  22  * If a module is configured as dynamic, its header should not
  23  * get included into slapd. While this is a general rule and does
  24  * not have much of an effect in UNIX, this rule should be adhered
  25  * to for Windows, where dynamic object code should not be implicitly
  26  * imported into slapd without appropriate __declspec(dllimport) directives.
  27  */
  28
  29 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  30 #include "back-bdb/external.h"
  31 #endif
  32 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  33 #include "back-dnssrv/external.h"
  34 #endif
  35 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  36 #include "back-ldap/external.h"
  37 #endif
  38 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  39 #include "back-ldbm/external.h"
  40 #endif
  41 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  42 #include "back-meta/external.h"
  43 #endif
  44 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  45 #include "back-monitor/external.h"
  46 #endif
  47 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  48 #include "back-passwd/external.h"
  49 #endif
  50 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  51 #include "back-perl/external.h"
  52 #endif
  53 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  54 #include "back-shell/external.h"
  55 #endif
  56 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  57 #include "back-tcl/external.h"
  58 #endif
  59 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  60 #include "back-sql/external.h"
  61 #endif
  62 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
  63 #include "private/external.h"
  64 #endif
  65
  66 static BackendInfo binfo[] = {
  67 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  68         {"bdb", bdb_initialize},
  69 #endif
  70 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  71         {"dnssrv",      dnssrv_back_initialize},
  72 #endif
  73 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  74         {"ldap",        ldap_back_initialize},
  75 #endif
  76 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  77         {"ldbm",        ldbm_back_initialize},
  78 #endif
  79 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  80         {"meta",        meta_back_initialize},
  81 #endif
  82 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  83         {"monitor",     monitor_back_initialize},
  84 #endif
  85 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  86         {"passwd",      passwd_back_initialize},
  87 #endif
  88 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  89         {"perl",        perl_back_initialize},
  90 #endif
  91 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  92         {"shell",       shell_back_initialize},
  93 #endif
  94 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  95         {"tcl",         tcl_back_initialize},
  96 #endif
  97 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  98         {"sql",         sql_back_initialize},
  99 #endif
 100         /* for any private backend */
 101 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
 102         {"private",     private_back_initialize},
 103 #endif
 104         {NULL}
 105 };
 106
 107 int                     nBackendInfo = 0;
 108 BackendInfo     *backendInfo = NULL;
 109
 110 int                     nBackendDB = 0;
 111 BackendDB       *backendDB = NULL;
 112
 113 int backend_init(void)
 114 {
 115         int rc = -1;
 116
 117         if((nBackendInfo != 0) || (backendInfo != NULL)) {
 118                 /* already initialized */
 119 #ifdef NEW_LOGGING
 120                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 121                            "backend_init:  backend already initialized\n" ));
 122 #else
 123                 Debug( LDAP_DEBUG_ANY,
 124                         "backend_init: already initialized.\n", 0, 0, 0 );
 125 #endif
 126                 return -1;
 127         }
 128
 129         for( ;
 130                 binfo[nBackendInfo].bi_type != NULL;
 131                 nBackendInfo++ )
 132         {
 133                 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 134
 135                 if(rc != 0) {
 136 #ifdef NEW_LOGGING
 137                         LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 138                                 "backend_init:  initialized for type \"%s\"\n",
 139                                 binfo[nBackendInfo].bi_type ));
 140 #else
 141                         Debug( LDAP_DEBUG_ANY,
 142                                 "backend_init: initialized for type \"%s\"\n",
 143                                 binfo[nBackendInfo].bi_type, 0, 0 );
 144 #endif
 145                         /* destroy those we've already inited */
 146                         for( nBackendInfo--;
 147                                 nBackendInfo >= 0 ;
 148                                 nBackendInfo-- )
 149                         {
 150                                 if ( binfo[nBackendInfo].bi_destroy ) {
 151                                         binfo[nBackendInfo].bi_destroy(
 152                                                 &binfo[nBackendInfo] );
 153                                 }
 154                         }
 155                         return rc;
 156                 }
 157         }
 158
 159         if ( nBackendInfo > 0) {
 160                 backendInfo = binfo;
 161                 return 0;
 162         }
 163
 164 #ifdef SLAPD_MODULES
 165         return 0;
 166 #else
 167
 168 #ifdef NEW_LOGGING
 169         LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 170                 "backend_init: failed\n" ));
 171 #else
 172         Debug( LDAP_DEBUG_ANY,
 173                 "backend_init: failed\n",
 174                 0, 0, 0 );
 175 #endif
 176
 177         return rc;
 178 #endif /* SLAPD_MODULES */
 179 }
 180
 181 int backend_add(BackendInfo *aBackendInfo)
 182 {
 183    int rc = 0;
 184
 185    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 186 #ifdef NEW_LOGGING
 187        LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 188                   "backend_add:  initialization for type \"%s\" failed\n",
 189                   aBackendInfo->bi_type ));
 190 #else
 191       Debug( LDAP_DEBUG_ANY,
 192              "backend_add: initialization for type \"%s\" failed\n",
 193              aBackendInfo->bi_type, 0, 0 );
 194 #endif
 195       return rc;
 196    }
 197
 198    /* now add the backend type to the Backend Info List */
 199    {
 200       BackendInfo *newBackendInfo = 0;
 201
 202       /* if backendInfo == binfo no deallocation of old backendInfo */
 203       if (backendInfo == binfo) {
 204          newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 205          AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) *
 206                 nBackendInfo);
 207       } else {
 208          newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
 209                                      (nBackendInfo + 1));
 210       }
 211       AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 212              sizeof(BackendInfo));
 213       backendInfo = newBackendInfo;
 214       nBackendInfo++;
 215
 216       return 0;
 217    }
 218 }
 219
 220 int backend_startup(Backend *be)
 221 {
 222         int i;
 223         int rc = 0;
 224
 225         if( ! ( nBackendDB > 0 ) ) {
 226                 /* no databases */
 227 #ifdef NEW_LOGGING
 228                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 229                            "backend_startup: %d databases to startup. \n",
 230                            nBackendDB ));
 231 #else
 232                 Debug( LDAP_DEBUG_ANY,
 233                         "backend_startup: %d databases to startup.\n",
 234                         nBackendDB, 0, 0 );
 235 #endif
 236                 return 1;
 237         }
 238
 239         if(be != NULL) {
 240                 /* startup a specific backend database */
 241 #ifdef NEW_LOGGING
 242                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 243                            "backend_startup:  starting \"%s\"\n",
 244                            be->be_suffix[0] ));
 245 #else
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "backend_startup: starting \"%s\"\n",
 248                         be->be_suffix[0], 0, 0 );
 249 #endif
 250
 251                 if ( be->bd_info->bi_open ) {
 252                         rc = be->bd_info->bi_open( be->bd_info );
 253                 }
 254
 255                 if(rc != 0) {
 256 #ifdef NEW_LOGGING
 257                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 258                                    "backend_startup: bi_open failed!\n" ));
 259 #else
 260                         Debug( LDAP_DEBUG_ANY,
 261                                 "backend_startup: bi_open failed!\n",
 262                                 0, 0, 0 );
 263 #endif
 264
 265                         return rc;
 266                 }
 267
 268                 if ( be->bd_info->bi_db_open ) {
 269                         rc = be->bd_info->bi_db_open( be );
 270                 }
 271
 272                 if(rc != 0) {
 273 #ifdef NEW_LOGGING
 274                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 275                                    "backend_startup: bi_db_open failed!\n" ));
 276 #else
 277                         Debug( LDAP_DEBUG_ANY,
 278                                 "backend_startup: bi_db_open failed!\n",
 279                                 0, 0, 0 );
 280 #endif
 281                         return rc;
 282                 }
 283
 284                 return rc;
 285         }
 286
 287         /* open each backend type */
 288         for( i = 0; i < nBackendInfo; i++ ) {
 289                 if( backendInfo[i].bi_nDB == 0) {
 290                         /* no database of this type, don't open */
 291                         continue;
 292                 }
 293
 294                 if( backendInfo[i].bi_open ) {
 295                         rc = backendInfo[i].bi_open(
 296                                 &backendInfo[i] );
 297                 }
 298
 299                 if(rc != 0) {
 300 #ifdef NEW_LOGGING
 301                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 302                                    "backend_startup: bi_open %d failed!\n", i ));
 303 #else
 304                         Debug( LDAP_DEBUG_ANY,
 305                                 "backend_startup: bi_open %d failed!\n",
 306                                 i, 0, 0 );
 307 #endif
 308                         return rc;
 309                 }
 310         }
 311
 312         /* open each backend database */
 313         for( i = 0; i < nBackendDB; i++ ) {
 314                 /* append global access controls */
 315                 acl_append( &backendDB[i].be_acl, global_acl );
 316
 317                 if ( backendDB[i].bd_info->bi_db_open ) {
 318                         rc = backendDB[i].bd_info->bi_db_open(
 319                                 &backendDB[i] );
 320                 }
 321
 322                 if(rc != 0) {
 323 #ifdef NEW_LOGGING
 324                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 325                                    "backend_startup: bi_db_open %d failed!\n", i ));
 326 #else
 327                         Debug( LDAP_DEBUG_ANY,
 328                                 "backend_startup: bi_db_open %d failed!\n",
 329                                 i, 0, 0 );
 330 #endif
 331                         return rc;
 332                 }
 333         }
 334
 335         return rc;
 336 }
 337
 338 int backend_num( Backend *be )
 339 {
 340         int i;
 341
 342         if( be == NULL ) return -1;
 343
 344         for( i = 0; i < nBackendDB; i++ ) {
 345                 if( be == &backendDB[i] ) return i;
 346         }
 347         return -1;
 348 }
 349
 350 int backend_shutdown( Backend *be )
 351 {
 352         int i;
 353         int rc = 0;
 354
 355         if( be != NULL ) {
 356                 /* shutdown a specific backend database */
 357
 358                 if ( be->bd_info->bi_nDB == 0 ) {
 359                         /* no database of this type, we never opened it */
 360                         return 0;
 361                 }
 362
 363                 if ( be->bd_info->bi_db_close ) {
 364                         be->bd_info->bi_db_close( be );
 365                 }
 366
 367                 if( be->bd_info->bi_close ) {
 368                         be->bd_info->bi_close( be->bd_info );
 369                 }
 370
 371                 return 0;
 372         }
 373
 374         /* close each backend database */
 375         for( i = 0; i < nBackendDB; i++ ) {
 376                 if ( backendDB[i].bd_info->bi_db_close ) {
 377                         backendDB[i].bd_info->bi_db_close(
 378                                 &backendDB[i] );
 379                 }
 380
 381                 if(rc != 0) {
 382 #ifdef NEW_LOGGING
 383                         LDAP_LOG(( "backend", LDAP_LEVEL_NOTICE,
 384                                    "backend_shutdown: bi_close %s failed!\n",
 385                                    backendDB[i].be_type ));
 386 #else
 387                         Debug( LDAP_DEBUG_ANY,
 388                                 "backend_close: bi_close %s failed!\n",
 389                                 backendDB[i].be_type, 0, 0 );
 390 #endif
 391                 }
 392         }
 393
 394         /* close each backend type */
 395         for( i = 0; i < nBackendInfo; i++ ) {
 396                 if( backendInfo[i].bi_nDB == 0 ) {
 397                         /* no database of this type */
 398                         continue;
 399                 }
 400
 401                 if( backendInfo[i].bi_close ) {
 402                         backendInfo[i].bi_close(
 403                                 &backendInfo[i] );
 404                 }
 405         }
 406
 407         return 0;
 408 }
 409
 410 int backend_destroy(void)
 411 {
 412         int i;
 413
 414         /* destroy each backend database */
 415         for( i = 0; i < nBackendDB; i++ ) {
 416                 if ( backendDB[i].bd_info->bi_db_destroy ) {
 417                         backendDB[i].bd_info->bi_db_destroy(
 418                                 &backendDB[i] );
 419                 }
 420                 charray_free( backendDB[i].be_suffix );
 421                 ber_bvecfree( backendDB[i].be_nsuffix );
 422                 free( backendDB[i].be_rootdn.bv_val );
 423                 free( backendDB[i].be_rootndn.bv_val );
 424                 free( backendDB[i].be_rootpw.bv_val );
 425                 acl_destroy( backendDB[i].be_acl, global_acl );
 426         }
 427         free( backendDB );
 428
 429         /* destroy each backend type */
 430         for( i = 0; i < nBackendInfo; i++ ) {
 431                 if( backendInfo[i].bi_destroy ) {
 432                         backendInfo[i].bi_destroy(
 433                                 &backendInfo[i] );
 434                 }
 435         }
 436
 437 #ifdef SLAPD_MODULES
 438         if (backendInfo != binfo) {
 439            free(backendInfo);
 440         }
 441 #endif /* SLAPD_MODULES */
 442
 443         nBackendInfo = 0;
 444         backendInfo = NULL;
 445
 446         return 0;
 447 }
 448
 449 BackendInfo* backend_info(const char *type)
 450 {
 451         int i;
 452
 453         /* search for the backend type */
 454         for( i = 0; i < nBackendInfo; i++ ) {
 455                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 456                         return &backendInfo[i];
 457                 }
 458         }
 459
 460         return NULL;
 461 }
 462
 463
 464 BackendDB *
 465 backend_db_init(
 466     const char  *type
 467 )
 468 {
 469         Backend *be;
 470         BackendInfo *bi = backend_info(type);
 471         int     rc = 0;
 472
 473         if( bi == NULL ) {
 474                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 475                 return NULL;
 476         }
 477
 478         backendDB = (BackendDB *) ch_realloc(
 479                         (char *) backendDB,
 480                     (nBackendDB + 1) * sizeof(Backend) );
 481
 482         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 483
 484         be = &backends[nbackends++];
 485
 486         be->bd_info = bi;
 487         be->be_def_limit = deflimit;
 488         be->be_dfltaccess = global_default_access;
 489
 490         be->be_restrictops = global_restrictops;
 491         be->be_requires = global_requires;
 492
 493         /* assign a default depth limit for alias deref */
 494         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 495
 496         if(bi->bi_db_init) {
 497                 rc = bi->bi_db_init( be );
 498         }
 499
 500         if(rc != 0) {
 501                 fprintf( stderr, "database init failed (%s)\n", type );
 502                 nbackends--;
 503                 return NULL;
 504         }
 505
 506         bi->bi_nDB++;
 507         return( be );
 508 }
 509
 510 void
 511 be_db_close( void )
 512 {
 513         int     i;
 514
 515         for ( i = 0; i < nbackends; i++ ) {
 516                 if ( backends[i].bd_info->bi_db_close ) {
 517                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 518                 }
 519         }
 520 }
 521
 522 Backend *
 523 select_backend(
 524         const char * dn,
 525         int manageDSAit,
 526         int noSubs )
 527 {
 528         int     i, j, len, dnlen;
 529         Backend *be = NULL;
 530
 531         dnlen = strlen( dn );
 532         for ( i = 0; i < nbackends; i++ ) {
 533                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 534                     backends[i].be_nsuffix[j] != NULL; j++ )
 535                 {
 536                         if ((backends[i].be_glueflags&SLAP_GLUE_SUBORDINATE)&&
 537                                 noSubs)
 538                                 continue;
 539
 540                         len = backends[i].be_nsuffix[j]->bv_len;
 541
 542                         if ( len > dnlen ) {
 543                                 /* suffix is longer than DN */
 544                                 continue;
 545                         }
 546
 547
 548                         if ( len && len < dnlen && ( !DN_SEPARATOR( dn[(dnlen-len)-1] ) || DN_ESCAPE( dn[(dnlen-len)-2] ) ) ) {
 549                                 /* make sure we have a separator */
 550                                 continue;
 551                         }
 552
 553
 554                         if ( strcmp( backends[i].be_nsuffix[j]->bv_val, &dn[dnlen-len] ) == 0 ) {
 555                                 if( be == NULL ) {
 556                                         be = &backends[i];
 557
 558                                         if( manageDSAit && len == dnlen ) {
 559                                                 continue;
 560                                         }
 561                                 } else {
 562                                         be = &backends[i];
 563                                 }
 564                                 return be;
 565                         }
 566                 }
 567         }
 568
 569         return be;
 570 }
 571
 572 int
 573 be_issuffix(
 574     Backend     *be,
 575     const char  *suffix
 576 )
 577 {
 578         int     i;
 579         size_t len = strlen(suffix);
 580
 581         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
 582                 if ( len != be->be_nsuffix[i]->bv_len ) {
 583                         continue;
 584                 }
 585                 if ( strcmp( be->be_nsuffix[i]->bv_val, suffix ) == 0 ) {
 586                         return( 1 );
 587                 }
 588         }
 589
 590         return( 0 );
 591 }
 592
 593 int
 594 be_isroot( Backend *be, const char *ndn )
 595 {
 596         int rc;
 597
 598         if ( ndn == NULL || *ndn == '\0' ) {
 599                 return( 0 );
 600         }
 601
 602         if ( !be->be_rootndn.bv_len ) {
 603                 return( 0 );
 604         }
 605
 606         rc = strcmp( be->be_rootndn.bv_val, ndn ) ? 0 : 1;
 607
 608         return(rc);
 609 }
 610
 611 int
 612 be_isupdate( Backend *be, struct berval *ndn )
 613 {
 614         if ( !ndn->bv_len ) {
 615                 return( 0 );
 616         }
 617
 618         if ( !be->be_update_ndn.bv_len ) {
 619                 return( 0 );
 620         }
 621
 622         return strcmp( be->be_update_ndn.bv_val, ndn->bv_val ) ? 0 : 1;
 623 }
 624
 625 char *
 626 be_root_dn( Backend *be )
 627 {
 628         if ( !be->be_rootdn.bv_len ) {
 629                 return( "" );
 630         }
 631
 632         return be->be_rootdn.bv_val;
 633 }
 634
 635 int
 636 be_isroot_pw( Backend *be,
 637         Connection *conn,
 638         const char *ndn,
 639         struct berval *cred )
 640 {
 641         int result;
 642
 643         if ( ! be_isroot( be, ndn ) ) {
 644                 return 0;
 645         }
 646
 647         if( be->be_rootpw.bv_len == 0 ) {
 648                 return 0;
 649         }
 650
 651 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 652         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 653 #ifdef SLAPD_SPASSWD
 654         lutil_passwd_sasl_conn = conn->c_sasl_context;
 655 #endif
 656 #endif
 657
 658         result = lutil_passwd( &be->be_rootpw, cred, NULL );
 659
 660 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 661 #ifdef SLAPD_SPASSWD
 662         lutil_passwd_sasl_conn = NULL;
 663 #endif
 664         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 665 #endif
 666
 667         return result == 0;
 668 }
 669
 670 int
 671 be_entry_release_rw(
 672         BackendDB *be,
 673         Connection *conn,
 674         Operation *op,
 675         Entry *e,
 676         int rw )
 677 {
 678         if ( be->be_release ) {
 679                 /* free and release entry from backend */
 680                 return be->be_release( be, conn, op, e, rw );
 681         } else {
 682                 /* free entry */
 683                 entry_free( e );
 684                 return 0;
 685         }
 686 }
 687
 688 int
 689 backend_unbind(
 690         Connection   *conn,
 691         Operation    *op
 692 )
 693 {
 694         int     i;
 695
 696         for ( i = 0; i < nbackends; i++ ) {
 697                 if ( backends[i].be_unbind ) {
 698                         (*backends[i].be_unbind)( &backends[i], conn, op );
 699                 }
 700         }
 701
 702         return 0;
 703 }
 704
 705 int
 706 backend_connection_init(
 707         Connection   *conn
 708 )
 709 {
 710         int     i;
 711
 712         for ( i = 0; i < nbackends; i++ ) {
 713                 if ( backends[i].be_connection_init ) {
 714                         (*backends[i].be_connection_init)( &backends[i], conn);
 715                 }
 716         }
 717
 718         return 0;
 719 }
 720
 721 int
 722 backend_connection_destroy(
 723         Connection   *conn
 724 )
 725 {
 726         int     i;
 727
 728         for ( i = 0; i < nbackends; i++ ) {
 729                 if ( backends[i].be_connection_destroy ) {
 730                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 731                 }
 732         }
 733
 734         return 0;
 735 }
 736
 737 static int
 738 backend_check_controls(
 739         Backend *be,
 740         Connection *conn,
 741         Operation *op,
 742         const char **text )
 743 {
 744         LDAPControl **ctrls;
 745         ctrls = op->o_ctrls;
 746         if( ctrls == NULL ) {
 747                 return LDAP_SUCCESS;
 748         }
 749
 750         for( ; *ctrls != NULL ; ctrls++ ) {
 751                 if( (*ctrls)->ldctl_iscritical &&
 752                         !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 753                 {
 754                         *text = "control unavailable in NamingContext";
 755                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 756                 }
 757         }
 758
 759         return LDAP_SUCCESS;
 760 }
 761
 762 int
 763 backend_check_restrictions(
 764         Backend *be,
 765         Connection *conn,
 766         Operation *op,
 767         const void *opdata,
 768         const char **text )
 769 {
 770         int rc;
 771         slap_mask_t restrictops;
 772         slap_mask_t requires;
 773         slap_mask_t opflag;
 774         slap_ssf_set_t *ssf;
 775         int updateop = 0;
 776
 777         if( be ) {
 778                 rc = backend_check_controls( be, conn, op, text );
 779
 780                 if( rc != LDAP_SUCCESS ) {
 781                         return rc;
 782                 }
 783
 784                 restrictops = be->be_restrictops;
 785                 requires = be->be_requires;
 786                 ssf = &be->be_ssf_set;
 787
 788         } else {
 789                 restrictops = global_restrictops;
 790                 requires = global_requires;
 791                 ssf = &global_ssf_set;
 792         }
 793
 794         switch( op->o_tag ) {
 795         case LDAP_REQ_ADD:
 796                 opflag = SLAP_RESTRICT_OP_ADD;
 797                 updateop++;
 798                 break;
 799         case LDAP_REQ_BIND:
 800                 opflag = SLAP_RESTRICT_OP_BIND;
 801                 break;
 802         case LDAP_REQ_COMPARE:
 803                 opflag = SLAP_RESTRICT_OP_COMPARE;
 804                 break;
 805         case LDAP_REQ_DELETE:
 806                 updateop++;
 807                 opflag = SLAP_RESTRICT_OP_DELETE;
 808                 break;
 809         case LDAP_REQ_EXTENDED:
 810                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 811                 break;
 812         case LDAP_REQ_MODIFY:
 813                 updateop++;
 814                 opflag = SLAP_RESTRICT_OP_MODIFY;
 815                 break;
 816         case LDAP_REQ_RENAME:
 817                 updateop++;
 818                 opflag = SLAP_RESTRICT_OP_RENAME;
 819                 break;
 820         case LDAP_REQ_SEARCH:
 821                 opflag = SLAP_RESTRICT_OP_SEARCH;
 822                 break;
 823         case LDAP_REQ_UNBIND:
 824                 opflag = 0;
 825                 break;
 826         default:
 827                 *text = "restrict operations internal error";
 828                 return LDAP_OTHER;
 829         }
 830
 831         if ( op->o_tag != LDAP_REQ_EXTENDED
 832                 || strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) )
 833         {
 834                 /* these checks don't apply to StartTLS */
 835
 836                 if( op->o_tag == LDAP_REQ_EXTENDED ) {
 837                         /* threat other extended operations as update ops */
 838                         updateop++;
 839                 }
 840
 841                 if( op->o_transport_ssf < ssf->sss_transport ) {
 842                         *text = "transport confidentiality required";
 843                         return LDAP_CONFIDENTIALITY_REQUIRED;
 844                 }
 845
 846                 if( op->o_tls_ssf < ssf->sss_tls ) {
 847                         *text = "TLS confidentiality required";
 848                         return LDAP_CONFIDENTIALITY_REQUIRED;
 849                 }
 850
 851                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 852                         /* these checks don't apply to SASL bind */
 853
 854                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 855                                 *text = "SASL confidentiality required";
 856                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 857                         }
 858
 859                         if( op->o_ssf < ssf->sss_ssf ) {
 860                                 *text = "confidentiality required";
 861                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 862                         }
 863                 }
 864
 865                 if( updateop ) {
 866                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 867                                 *text = "transport update confidentiality required";
 868                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 869                         }
 870
 871                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 872                                 *text = "TLS update confidentiality required";
 873                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 874                         }
 875
 876                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 877                                 *text = "SASL update confidentiality required";
 878                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 879                         }
 880
 881                         if( op->o_ssf < ssf->sss_update_ssf ) {
 882                                 *text = "update confidentiality required";
 883                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 884                         }
 885
 886                         if( op->o_ndn.bv_len == 0 ) {
 887                                 *text = "modifications require authentication";
 888                                 return LDAP_OPERATIONS_ERROR;
 889                         }
 890                 }
 891         }
 892
 893         if ( op->o_tag != LDAP_REQ_BIND && ( op->o_tag != LDAP_REQ_EXTENDED ||
 894                 strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) ) )
 895         {
 896                 /* these checks don't apply to Bind or StartTLS */
 897
 898                 if( requires & SLAP_REQUIRE_STRONG ) {
 899                         /* should check mechanism */
 900                         if( op->o_authmech == NULL || op->o_dn.bv_len == 0 )
 901                         {
 902                                 *text = "strong authentication required";
 903                                 return LDAP_STRONG_AUTH_REQUIRED;
 904                         }
 905                 }
 906
 907                 if( requires & SLAP_REQUIRE_SASL ) {
 908                         if( op->o_authmech == NULL || op->o_dn.bv_len == 0 )
 909                         {
 910                                 *text = "SASL authentication required";
 911                                 return LDAP_STRONG_AUTH_REQUIRED;
 912                         }
 913                 }
 914
 915                 if( requires & SLAP_REQUIRE_AUTHC ) {
 916                         if( op->o_dn.bv_len == 0 ) {
 917                                 *text = "authentication required";
 918                                 return LDAP_UNWILLING_TO_PERFORM;
 919                         }
 920                 }
 921
 922                 if( requires & SLAP_REQUIRE_BIND ) {
 923                         int version;
 924                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 925                         version = conn->c_protocol;
 926                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 927
 928                         if( !version ) {
 929                                 /* no bind has occurred */
 930                                 *text = "BIND required";
 931                                 return LDAP_OPERATIONS_ERROR;
 932                         }
 933                 }
 934
 935                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 936                         if( op->o_protocol < LDAP_VERSION3 ) {
 937                                 /* no bind has occurred */
 938                                 *text = "operation restricted to LDAPv3 clients";
 939                                 return LDAP_OPERATIONS_ERROR;
 940                         }
 941                 }
 942         }
 943
 944         if( restrictops & opflag ) {
 945                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 946                         *text = "read operations restricted";
 947                 } else {
 948                         *text = "operation restricted";
 949                 }
 950                 return LDAP_UNWILLING_TO_PERFORM;
 951         }
 952
 953         return LDAP_SUCCESS;
 954 }
 955
 956 int backend_check_referrals(
 957         Backend *be,
 958         Connection *conn,
 959         Operation *op,
 960         const char *dn,
 961         const char *ndn )
 962 {
 963         int rc = LDAP_SUCCESS;
 964
 965         if( be->be_chk_referrals ) {
 966                 const char *text;
 967
 968                 rc = be->be_chk_referrals( be,
 969                         conn, op, dn, ndn, &text );
 970
 971                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 972                         send_ldap_result( conn, op, rc,
 973                                 NULL, text, NULL, NULL );
 974                 }
 975         }
 976
 977         return rc;
 978 }
 979
 980 int
 981 backend_group(
 982         Backend *be,
 983         Connection *conn,
 984         Operation *op,
 985         Entry   *target,
 986         const char      *gr_ndn,
 987         const char      *op_ndn,
 988         ObjectClass *group_oc,
 989         AttributeDescription *group_at
 990 )
 991 {
 992         GroupAssertion *g;
 993         int len = strlen(gr_ndn);
 994         int i;
 995
 996         ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 997         i = op->o_abandon;
 998         ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 999         if (i)
1000                 return SLAPD_ABANDON;
1001
1002         if( strcmp( target->e_ndn, gr_ndn ) != 0 ) {
1003                 /* we won't attempt to send it to a different backend */
1004
1005                 be = select_backend(gr_ndn, 0,
1006                         (be->be_glueflags & SLAP_GLUE_INSTANCE));
1007
1008                 if (be == NULL) {
1009                         return LDAP_NO_SUCH_OBJECT;
1010                 }
1011         }
1012
1013         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1014         for (g = conn->c_groups; g; g=g->next) {
1015                 if (g->be != be || g->oc != group_oc || g->at != group_at ||
1016                     g->len != len)
1017                         continue;
1018                 if (strcmp( g->ndn, gr_ndn ) == 0)
1019                         break;
1020         }
1021         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1022         if (g)
1023                 return g->res;
1024
1025         if( be->be_group ) {
1026                 int res = be->be_group( be, conn, op,
1027                         target, gr_ndn, op_ndn,
1028                         group_oc, group_at );
1029
1030                 if (op->o_tag != LDAP_REQ_BIND) {
1031                         g = ch_malloc(sizeof(GroupAssertion) + len);
1032                         g->be = be;
1033                         g->oc = group_oc;
1034                         g->at = group_at;
1035                         g->res = res;
1036                         g->len = len;
1037                         strcpy(g->ndn, gr_ndn);
1038                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1039                         g->next = conn->c_groups;
1040                         conn->c_groups = g;
1041                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1042                 }
1043
1044                 return res;
1045         }
1046
1047         return LDAP_UNWILLING_TO_PERFORM;
1048 }
1049
1050 int
1051 backend_attribute(
1052         Backend *be,
1053         Connection *conn,
1054         Operation *op,
1055         Entry   *target,
1056         const char      *entry_ndn,
1057         AttributeDescription *entry_at,
1058         struct berval ***vals
1059 )
1060 {
1061         if( target == NULL ||
1062                 strcmp( target->e_ndn, entry_ndn ) != 0 )
1063         {
1064                 /* we won't attempt to send it to a different backend */
1065
1066                 be = select_backend(entry_ndn, 0,
1067                         (be->be_glueflags & SLAP_GLUE_INSTANCE));
1068
1069                 if (be == NULL) {
1070                         return LDAP_NO_SUCH_OBJECT;
1071                 }
1072         }
1073
1074         if( be->be_attribute ) {
1075                 return be->be_attribute( be, conn, op, target, entry_ndn,
1076                         entry_at, vals );
1077         }
1078
1079         return LDAP_UNWILLING_TO_PERFORM;
1080 }
1081
1082 Attribute *backend_operational(
1083         Backend *be,
1084         Connection *conn,
1085         Operation *op,
1086         Entry *e,
1087         char **attrs,
1088         int opattrs     )
1089 {
1090         Attribute *a = NULL, **ap = &a;
1091
1092 #ifdef SLAPD_SCHEMA_DN
1093         *ap = slap_operational_subschemaSubentry();
1094         ap = &(*ap)->a_next;
1095 #endif
1096
1097         /*
1098          * If operational attributes (allegedly) are required,
1099          * and the backend supports specific operational attributes,
1100          * add them to the attribute list
1101          */
1102         if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
1103                 ( void )be->be_operational( be, conn, op, e,
1104                                             attrs, opattrs, ap );
1105         }
1106
1107         return a;
1108 }
1109