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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 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]->bv_val ));
 245 #else
 246                 Debug( LDAP_DEBUG_TRACE,
 247                         "backend_startup: starting \"%s\"\n",
 248                         be->be_suffix[0]->bv_val, 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! (%d)\n", rc ));
 276 #else
 277                         Debug( LDAP_DEBUG_ANY,
 278                                 "backend_startup: bi_db_open failed! (%d)\n",
 279                                 rc, 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! (%d)\n",
 326                                 i, rc ));
 327 #else
 328                         Debug( LDAP_DEBUG_ANY,
 329                                 "backend_startup: bi_db_open(%d) failed! (%d)\n",
 330                                 i, rc, 0 );
 331 #endif
 332                         return rc;
 333                 }
 334         }
 335
 336         return rc;
 337 }
 338
 339 int backend_num( Backend *be )
 340 {
 341         int i;
 342
 343         if( be == NULL ) return -1;
 344
 345         for( i = 0; i < nBackendDB; i++ ) {
 346                 if( be == &backendDB[i] ) return i;
 347         }
 348         return -1;
 349 }
 350
 351 int backend_shutdown( Backend *be )
 352 {
 353         int i;
 354         int rc = 0;
 355
 356         if( be != NULL ) {
 357                 /* shutdown a specific backend database */
 358
 359                 if ( be->bd_info->bi_nDB == 0 ) {
 360                         /* no database of this type, we never opened it */
 361                         return 0;
 362                 }
 363
 364                 if ( be->bd_info->bi_db_close ) {
 365                         be->bd_info->bi_db_close( be );
 366                 }
 367
 368                 if( be->bd_info->bi_close ) {
 369                         be->bd_info->bi_close( be->bd_info );
 370                 }
 371
 372                 return 0;
 373         }
 374
 375         /* close each backend database */
 376         for( i = 0; i < nBackendDB; i++ ) {
 377                 if ( backendDB[i].bd_info->bi_db_close ) {
 378                         backendDB[i].bd_info->bi_db_close(
 379                                 &backendDB[i] );
 380                 }
 381
 382                 if(rc != 0) {
 383 #ifdef NEW_LOGGING
 384                         LDAP_LOG(( "backend", LDAP_LEVEL_NOTICE,
 385                                    "backend_shutdown: bi_close %s failed!\n",
 386                                    backendDB[i].be_type ));
 387 #else
 388                         Debug( LDAP_DEBUG_ANY,
 389                                 "backend_close: bi_close %s failed!\n",
 390                                 backendDB[i].be_type, 0, 0 );
 391 #endif
 392                 }
 393         }
 394
 395         /* close each backend type */
 396         for( i = 0; i < nBackendInfo; i++ ) {
 397                 if( backendInfo[i].bi_nDB == 0 ) {
 398                         /* no database of this type */
 399                         continue;
 400                 }
 401
 402                 if( backendInfo[i].bi_close ) {
 403                         backendInfo[i].bi_close(
 404                                 &backendInfo[i] );
 405                 }
 406         }
 407
 408         return 0;
 409 }
 410
 411 int backend_destroy(void)
 412 {
 413         int i;
 414         BackendDB *bd;
 415
 416         /* destroy each backend database */
 417         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 418                 if ( bd->bd_info->bi_db_destroy ) {
 419                         bd->bd_info->bi_db_destroy( bd );
 420                 }
 421                 ber_bvecfree( bd->be_suffix );
 422                 ber_bvecfree( bd->be_nsuffix );
 423                 if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 424                 if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 425                 if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 426                 acl_destroy( bd->be_acl, global_acl );
 427         }
 428         free( backendDB );
 429
 430         /* destroy each backend type */
 431         for( i = 0; i < nBackendInfo; i++ ) {
 432                 if( backendInfo[i].bi_destroy ) {
 433                         backendInfo[i].bi_destroy(
 434                                 &backendInfo[i] );
 435                 }
 436         }
 437
 438 #ifdef SLAPD_MODULES
 439         if (backendInfo != binfo) {
 440            free(backendInfo);
 441         }
 442 #endif /* SLAPD_MODULES */
 443
 444         nBackendInfo = 0;
 445         backendInfo = NULL;
 446
 447         return 0;
 448 }
 449
 450 BackendInfo* backend_info(const char *type)
 451 {
 452         int i;
 453
 454         /* search for the backend type */
 455         for( i = 0; i < nBackendInfo; i++ ) {
 456                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 457                         return &backendInfo[i];
 458                 }
 459         }
 460
 461         return NULL;
 462 }
 463
 464
 465 BackendDB *
 466 backend_db_init(
 467     const char  *type
 468 )
 469 {
 470         Backend *be;
 471         BackendInfo *bi = backend_info(type);
 472         int     rc = 0;
 473
 474         if( bi == NULL ) {
 475                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 476                 return NULL;
 477         }
 478
 479         backendDB = (BackendDB *) ch_realloc(
 480                         (char *) backendDB,
 481                     (nBackendDB + 1) * sizeof(Backend) );
 482
 483         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 484
 485         be = &backends[nbackends++];
 486
 487         be->bd_info = bi;
 488         be->be_def_limit = deflimit;
 489         be->be_dfltaccess = global_default_access;
 490
 491         be->be_restrictops = global_restrictops;
 492         be->be_requires = global_requires;
 493         be->be_ssf_set = global_ssf_set;
 494
 495         /* assign a default depth limit for alias deref */
 496         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 497
 498         if(bi->bi_db_init) {
 499                 rc = bi->bi_db_init( be );
 500         }
 501
 502         if(rc != 0) {
 503                 fprintf( stderr, "database init failed (%s)\n", type );
 504                 nbackends--;
 505                 return NULL;
 506         }
 507
 508         bi->bi_nDB++;
 509         return( be );
 510 }
 511
 512 void
 513 be_db_close( void )
 514 {
 515         int     i;
 516
 517         for ( i = 0; i < nbackends; i++ ) {
 518                 if ( backends[i].bd_info->bi_db_close ) {
 519                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 520                 }
 521         }
 522 }
 523
 524 Backend *
 525 select_backend(
 526         struct berval * dn,
 527         int manageDSAit,
 528         int noSubs )
 529 {
 530         int     i, j;
 531         ber_len_t len, dnlen = dn->bv_len;
 532         Backend *be = NULL;
 533
 534         for ( i = 0; i < nbackends; i++ ) {
 535                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 536                     backends[i].be_nsuffix[j] != NULL; j++ )
 537                 {
 538                         if (( backends[i].be_flags & SLAP_BFLAG_GLUE_SUBORDINATE )
 539                                 && noSubs )
 540                         {
 541                                 continue;
 542                         }
 543
 544                         len = backends[i].be_nsuffix[j]->bv_len;
 545
 546                         if ( len > dnlen ) {
 547                                 /* suffix is longer than DN */
 548                                 continue;
 549                         }
 550
 551                         if ( len && len < dnlen &&
 552                                 ( !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ) ||
 553                                         DN_ESCAPE( dn->bv_val[(dnlen-len)-2] ) ) )
 554                         {
 555                                 /* make sure we have a separator */
 556                                 continue;
 557                         }
 558
 559                         if ( strcmp( backends[i].be_nsuffix[j]->bv_val,
 560                                 &dn->bv_val[dnlen-len] ) == 0 )
 561                         {
 562                                 if( be == NULL ) {
 563                                         be = &backends[i];
 564
 565                                         if( manageDSAit && len == dnlen ) {
 566                                                 continue;
 567                                         }
 568                                 } else {
 569                                         be = &backends[i];
 570                                 }
 571                                 return be;
 572                         }
 573                 }
 574         }
 575
 576         return be;
 577 }
 578
 579 int
 580 be_issuffix(
 581     Backend     *be,
 582     struct berval       *bvsuffix
 583 )
 584 {
 585         int     i;
 586
 587         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i] != NULL; i++ ) {
 588                 if ( ber_bvcmp( be->be_nsuffix[i], bvsuffix ) == 0 ) {
 589                         return( 1 );
 590                 }
 591         }
 592
 593         return( 0 );
 594 }
 595
 596 int
 597 be_isroot( Backend *be, struct berval *ndn )
 598 {
 599         if ( !ndn->bv_len ) {
 600                 return( 0 );
 601         }
 602
 603         if ( !be->be_rootndn.bv_len ) {
 604                 return( 0 );
 605         }
 606
 607         return dn_match( &be->be_rootndn, ndn );
 608 }
 609
 610 int
 611 be_isupdate( Backend *be, struct berval *ndn )
 612 {
 613         if ( !ndn->bv_len ) {
 614                 return( 0 );
 615         }
 616
 617         if ( !be->be_update_ndn.bv_len ) {
 618                 return( 0 );
 619         }
 620
 621         return dn_match( &be->be_update_ndn, ndn );
 622 }
 623
 624 struct berval *
 625 be_root_dn( Backend *be )
 626 {
 627         return &be->be_rootdn;
 628 }
 629
 630 int
 631 be_isroot_pw( Backend *be,
 632         Connection *conn,
 633         struct berval *ndn,
 634         struct berval *cred )
 635 {
 636         int result;
 637
 638         if ( ! be_isroot( be, ndn ) ) {
 639                 return 0;
 640         }
 641
 642         if( be->be_rootpw.bv_len == 0 ) {
 643                 return 0;
 644         }
 645
 646 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 647         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 648 #ifdef SLAPD_SPASSWD
 649         lutil_passwd_sasl_conn = conn->c_sasl_context;
 650 #endif
 651 #endif
 652
 653         result = lutil_passwd( &be->be_rootpw, cred, NULL );
 654
 655 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 656 #ifdef SLAPD_SPASSWD
 657         lutil_passwd_sasl_conn = NULL;
 658 #endif
 659         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 660 #endif
 661
 662         return result == 0;
 663 }
 664
 665 int
 666 be_entry_release_rw(
 667         BackendDB *be,
 668         Connection *conn,
 669         Operation *op,
 670         Entry *e,
 671         int rw )
 672 {
 673         if ( be->be_release ) {
 674                 /* free and release entry from backend */
 675                 return be->be_release( be, conn, op, e, rw );
 676         } else {
 677                 /* free entry */
 678                 entry_free( e );
 679                 return 0;
 680         }
 681 }
 682
 683 int
 684 backend_unbind(
 685         Connection   *conn,
 686         Operation    *op
 687 )
 688 {
 689         int     i;
 690
 691         for ( i = 0; i < nbackends; i++ ) {
 692                 if ( backends[i].be_unbind ) {
 693                         (*backends[i].be_unbind)( &backends[i], conn, op );
 694                 }
 695         }
 696
 697         return 0;
 698 }
 699
 700 int
 701 backend_connection_init(
 702         Connection   *conn
 703 )
 704 {
 705         int     i;
 706
 707         for ( i = 0; i < nbackends; i++ ) {
 708                 if ( backends[i].be_connection_init ) {
 709                         (*backends[i].be_connection_init)( &backends[i], conn);
 710                 }
 711         }
 712
 713         return 0;
 714 }
 715
 716 int
 717 backend_connection_destroy(
 718         Connection   *conn
 719 )
 720 {
 721         int     i;
 722
 723         for ( i = 0; i < nbackends; i++ ) {
 724                 if ( backends[i].be_connection_destroy ) {
 725                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 726                 }
 727         }
 728
 729         return 0;
 730 }
 731
 732 static int
 733 backend_check_controls(
 734         Backend *be,
 735         Connection *conn,
 736         Operation *op,
 737         const char **text )
 738 {
 739         LDAPControl **ctrls;
 740         ctrls = op->o_ctrls;
 741         if( ctrls == NULL ) {
 742                 return LDAP_SUCCESS;
 743         }
 744
 745         for( ; *ctrls != NULL ; ctrls++ ) {
 746                 if( (*ctrls)->ldctl_iscritical &&
 747                         !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 748                 {
 749                         *text = "control unavailable in context";
 750                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 751                 }
 752         }
 753
 754         return LDAP_SUCCESS;
 755 }
 756
 757 int
 758 backend_check_restrictions(
 759         Backend *be,
 760         Connection *conn,
 761         Operation *op,
 762         const void *opdata,
 763         const char **text )
 764 {
 765         int rc;
 766         slap_mask_t restrictops;
 767         slap_mask_t requires;
 768         slap_mask_t opflag;
 769         slap_ssf_set_t *ssf;
 770         int updateop = 0;
 771
 772         if( be ) {
 773                 rc = backend_check_controls( be, conn, op, text );
 774
 775                 if( rc != LDAP_SUCCESS ) {
 776                         return rc;
 777                 }
 778
 779                 restrictops = be->be_restrictops;
 780                 requires = be->be_requires;
 781                 ssf = &be->be_ssf_set;
 782
 783         } else {
 784                 restrictops = global_restrictops;
 785                 requires = global_requires;
 786                 ssf = &global_ssf_set;
 787         }
 788
 789         switch( op->o_tag ) {
 790         case LDAP_REQ_ADD:
 791                 opflag = SLAP_RESTRICT_OP_ADD;
 792                 updateop++;
 793                 break;
 794         case LDAP_REQ_BIND:
 795                 opflag = SLAP_RESTRICT_OP_BIND;
 796                 break;
 797         case LDAP_REQ_COMPARE:
 798                 opflag = SLAP_RESTRICT_OP_COMPARE;
 799                 break;
 800         case LDAP_REQ_DELETE:
 801                 updateop++;
 802                 opflag = SLAP_RESTRICT_OP_DELETE;
 803                 break;
 804         case LDAP_REQ_EXTENDED:
 805                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 806                 break;
 807         case LDAP_REQ_MODIFY:
 808                 updateop++;
 809                 opflag = SLAP_RESTRICT_OP_MODIFY;
 810                 break;
 811         case LDAP_REQ_RENAME:
 812                 updateop++;
 813                 opflag = SLAP_RESTRICT_OP_RENAME;
 814                 break;
 815         case LDAP_REQ_SEARCH:
 816                 opflag = SLAP_RESTRICT_OP_SEARCH;
 817                 break;
 818         case LDAP_REQ_UNBIND:
 819                 opflag = 0;
 820                 break;
 821         default:
 822                 *text = "restrict operations internal error";
 823                 return LDAP_OTHER;
 824         }
 825
 826         if ( op->o_tag != LDAP_REQ_EXTENDED
 827                 || strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) )
 828         {
 829                 /* these checks don't apply to StartTLS */
 830
 831                 if( op->o_tag == LDAP_REQ_EXTENDED ) {
 832                         /* threat other extended operations as update ops */
 833                         updateop++;
 834                 }
 835
 836                 if( op->o_transport_ssf < ssf->sss_transport ) {
 837                         *text = "transport confidentiality required";
 838                         return LDAP_CONFIDENTIALITY_REQUIRED;
 839                 }
 840
 841                 if( op->o_tls_ssf < ssf->sss_tls ) {
 842                         *text = "TLS confidentiality required";
 843                         return LDAP_CONFIDENTIALITY_REQUIRED;
 844                 }
 845
 846                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 847                         /* these checks don't apply to SASL bind */
 848
 849                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 850                                 *text = "SASL confidentiality required";
 851                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 852                         }
 853
 854                         if( op->o_ssf < ssf->sss_ssf ) {
 855                                 *text = "confidentiality required";
 856                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 857                         }
 858                 }
 859
 860                 if( updateop ) {
 861                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 862                                 *text = "transport update confidentiality required";
 863                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 864                         }
 865
 866                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 867                                 *text = "TLS update confidentiality required";
 868                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 869                         }
 870
 871                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 872                                 *text = "SASL update confidentiality required";
 873                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 874                         }
 875
 876                         if( op->o_ssf < ssf->sss_update_ssf ) {
 877                                 *text = "update confidentiality required";
 878                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 879                         }
 880
 881                         if( op->o_ndn.bv_len == 0 ) {
 882                                 *text = "modifications require authentication";
 883                                 return LDAP_OPERATIONS_ERROR;
 884                         }
 885                 }
 886         }
 887
 888         if ( op->o_tag != LDAP_REQ_BIND && ( op->o_tag != LDAP_REQ_EXTENDED ||
 889                 strcmp( (const char *) opdata, LDAP_EXOP_START_TLS ) ) )
 890         {
 891                 /* these checks don't apply to Bind or StartTLS */
 892
 893                 if( requires & SLAP_REQUIRE_STRONG ) {
 894                         /* should check mechanism */
 895                         if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 )
 896                         {
 897                                 *text = "strong authentication required";
 898                                 return LDAP_STRONG_AUTH_REQUIRED;
 899                         }
 900                 }
 901
 902                 if( requires & SLAP_REQUIRE_SASL ) {
 903                         if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 )
 904                         {
 905                                 *text = "SASL authentication required";
 906                                 return LDAP_STRONG_AUTH_REQUIRED;
 907                         }
 908                 }
 909
 910                 if( requires & SLAP_REQUIRE_AUTHC ) {
 911                         if( op->o_dn.bv_len == 0 ) {
 912                                 *text = "authentication required";
 913                                 return LDAP_UNWILLING_TO_PERFORM;
 914                         }
 915                 }
 916
 917                 if( requires & SLAP_REQUIRE_BIND ) {
 918                         int version;
 919                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 920                         version = conn->c_protocol;
 921                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 922
 923                         if( !version ) {
 924                                 /* no bind has occurred */
 925                                 *text = "BIND required";
 926                                 return LDAP_OPERATIONS_ERROR;
 927                         }
 928                 }
 929
 930                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 931                         if( op->o_protocol < LDAP_VERSION3 ) {
 932                                 /* no bind has occurred */
 933                                 *text = "operation restricted to LDAPv3 clients";
 934                                 return LDAP_OPERATIONS_ERROR;
 935                         }
 936                 }
 937         }
 938
 939         if( restrictops & opflag ) {
 940                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 941                         *text = "read operations restricted";
 942                 } else {
 943                         *text = "operation restricted";
 944                 }
 945                 return LDAP_UNWILLING_TO_PERFORM;
 946         }
 947
 948         return LDAP_SUCCESS;
 949 }
 950
 951 int backend_check_referrals(
 952         Backend *be,
 953         Connection *conn,
 954         Operation *op,
 955         struct berval *dn,
 956         struct berval *ndn )
 957 {
 958         int rc = LDAP_SUCCESS;
 959
 960         if( be->be_chk_referrals ) {
 961                 const char *text;
 962
 963                 rc = be->be_chk_referrals( be,
 964                         conn, op, dn, ndn, &text );
 965
 966                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 967                         send_ldap_result( conn, op, rc,
 968                                 NULL, text, NULL, NULL );
 969                 }
 970         }
 971
 972         return rc;
 973 }
 974
 975 int
 976 backend_group(
 977         Backend *be,
 978         Connection *conn,
 979         Operation *op,
 980         Entry   *target,
 981         struct berval *gr_ndn,
 982         struct berval *op_ndn,
 983         ObjectClass *group_oc,
 984         AttributeDescription *group_at
 985 )
 986 {
 987         GroupAssertion *g;
 988         int i;
 989
 990         ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 991         i = op->o_abandon;
 992         ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 993         if (i) return SLAPD_ABANDON;
 994
 995         if ( !dn_match( &target->e_nname, gr_ndn ) ) {
 996                 /* we won't attempt to send it to a different backend */
 997
 998                 be = select_backend( gr_ndn, 0,
 999                         (be->be_flags & SLAP_BFLAG_GLUE_INSTANCE));
1000
1001                 if (be == NULL) {
1002                         return LDAP_NO_SUCH_OBJECT;
1003                 }
1004         }
1005
1006         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1007         for (g = conn->c_groups; g; g=g->ga_next) {
1008                 if (g->ga_be != be || g->ga_oc != group_oc ||
1009                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
1010                         continue;
1011                 if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
1012                         break;
1013         }
1014         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1015         if (g) {
1016                 return g->ga_res;
1017         }
1018
1019         if( be->be_group ) {
1020                 int res = be->be_group( be, conn, op,
1021                         target, gr_ndn, op_ndn,
1022                         group_oc, group_at );
1023
1024                 if (op->o_tag != LDAP_REQ_BIND) {
1025                         g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
1026                         g->ga_be = be;
1027                         g->ga_oc = group_oc;
1028                         g->ga_at = group_at;
1029                         g->ga_res = res;
1030                         g->ga_len = gr_ndn->bv_len;
1031                         strcpy(g->ga_ndn, gr_ndn->bv_val);
1032                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1033                         g->ga_next = conn->c_groups;
1034                         conn->c_groups = g;
1035                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1036                 }
1037
1038                 return res;
1039         }
1040
1041         return LDAP_UNWILLING_TO_PERFORM;
1042 }
1043
1044 int
1045 backend_attribute(
1046         Backend *be,
1047         Connection *conn,
1048         Operation *op,
1049         Entry   *target,
1050         struct berval   *edn,
1051         AttributeDescription *entry_at,
1052         BerVarray *vals
1053 )
1054 {
1055         if ( target == NULL || !dn_match( &target->e_nname, edn ) ) {
1056                 /* we won't attempt to send it to a different backend */
1057
1058                 be = select_backend( edn, 0,
1059                         (be->be_flags & SLAP_BFLAG_GLUE_INSTANCE));
1060
1061                 if (be == NULL) {
1062                         return LDAP_NO_SUCH_OBJECT;
1063                 }
1064         }
1065
1066         if( be->be_attribute ) {
1067                 return be->be_attribute( be, conn, op, target, edn,
1068                         entry_at, vals );
1069         }
1070
1071         return LDAP_UNWILLING_TO_PERFORM;
1072 }
1073
1074 Attribute *backend_operational(
1075         Backend *be,
1076         Connection *conn,
1077         Operation *op,
1078         Entry *e,
1079         AttributeName *attrs,
1080         int opattrs     )
1081 {
1082         Attribute *a = NULL, **ap = &a;
1083
1084 #ifdef SLAPD_SCHEMA_DN
1085         *ap = slap_operational_subschemaSubentry();
1086         ap = &(*ap)->a_next;
1087 #endif
1088
1089         /*
1090          * If operational attributes (allegedly) are required,
1091          * and the backend supports specific operational attributes,
1092          * add them to the attribute list
1093          */
1094         if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
1095                 ( void )be->be_operational( be, conn, op, e, attrs, opattrs, ap );
1096         }
1097
1098         return a;
1099 }
1100