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