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

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