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