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 #include "lber_pvt.h"
  21
  22 /*
  23  * If a module is configured as dynamic, its header should not
  24  * get included into slapd. While this is a general rule and does
  25  * not have much of an effect in UNIX, this rule should be adhered
  26  * to for Windows, where dynamic object code should not be implicitly
  27  * imported into slapd without appropriate __declspec(dllimport) directives.
  28  */
  29
  30 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  31 #include "back-bdb/external.h"
  32 #endif
  33 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  34 #include "back-dnssrv/external.h"
  35 #endif
  36 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  37 #include "back-ldap/external.h"
  38 #endif
  39 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  40 #include "back-ldbm/external.h"
  41 #endif
  42 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  43 #include "back-meta/external.h"
  44 #endif
  45 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  46 #include "back-monitor/external.h"
  47 #endif
  48 #if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
  49 #include "back-null/external.h"
  50 #endif
  51 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  52 #include "back-passwd/external.h"
  53 #endif
  54 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  55 #include "back-perl/external.h"
  56 #endif
  57 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  58 #include "back-shell/external.h"
  59 #endif
  60 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
  61 #include "back-tcl/external.h"
  62 #endif
  63 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
  64 #include "back-sql/external.h"
  65 #endif
  66 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
  67 #include "private/external.h"
  68 #endif
  69
  70 static BackendInfo binfo[] = {
  71 #if defined(SLAPD_BDB) && !defined(SLAPD_BDB_DYNAMIC)
  72         {"bdb", bdb_initialize},
  73 #endif
  74 #if defined(SLAPD_DNSSRV) && !defined(SLAPD_DNSSRV_DYNAMIC)
  75         {"dnssrv",      dnssrv_back_initialize},
  76 #endif
  77 #if defined(SLAPD_LDAP) && !defined(SLAPD_LDAP_DYNAMIC)
  78         {"ldap",        ldap_back_initialize},
  79 #endif
  80 #if defined(SLAPD_LDBM) && !defined(SLAPD_LDBM_DYNAMIC)
  81         {"ldbm",        ldbm_back_initialize},
  82 #endif
  83 #if defined(SLAPD_META) && !defined(SLAPD_META_DYNAMIC)
  84         {"meta",        meta_back_initialize},
  85 #endif
  86 #if defined(SLAPD_MONITOR) && !defined(SLAPD_MONITOR_DYNAMIC)
  87         {"monitor",     monitor_back_initialize},
  88 #endif
  89 #if defined(SLAPD_NULL) && !defined(SLAPD_NULL_DYNAMIC)
  90         {"null",        null_back_initialize},
  91 #endif
  92 #if defined(SLAPD_PASSWD) && !defined(SLAPD_PASSWD_DYNAMIC)
  93         {"passwd",      passwd_back_initialize},
  94 #endif
  95 #if defined(SLAPD_PERL) && !defined(SLAPD_PERL_DYNAMIC)
  96         {"perl",        perl_back_initialize},
  97 #endif
  98 #if defined(SLAPD_SHELL) && !defined(SLAPD_SHELL_DYNAMIC)
  99         {"shell",       shell_back_initialize},
 100 #endif
 101 #if defined(SLAPD_TCL) && !defined(SLAPD_TCL_DYNAMIC)
 102         {"tcl",         tcl_back_initialize},
 103 #endif
 104 #if defined(SLAPD_SQL) && !defined(SLAPD_SQL_DYNAMIC)
 105         {"sql",         sql_back_initialize},
 106 #endif
 107         /* for any private backend */
 108 #if defined(SLAPD_PRIVATE) && !defined(SLAPD_PRIVATE_DYNAMIC)
 109         {"private",     private_back_initialize},
 110 #endif
 111         {NULL}
 112 };
 113
 114 int                     nBackendInfo = 0;
 115 BackendInfo     *backendInfo = NULL;
 116
 117 int                     nBackendDB = 0;
 118 BackendDB       *backendDB = NULL;
 119
 120 int backend_init(void)
 121 {
 122         int rc = -1;
 123
 124         if((nBackendInfo != 0) || (backendInfo != NULL)) {
 125                 /* already initialized */
 126 #ifdef NEW_LOGGING
 127                 LDAP_LOG( BACKEND, ERR,
 128                         "backend_init:  backend already initialized\n", 0, 0, 0 );
 129 #else
 130                 Debug( LDAP_DEBUG_ANY,
 131                         "backend_init: already initialized.\n", 0, 0, 0 );
 132 #endif
 133                 return -1;
 134         }
 135
 136         for( ;
 137                 binfo[nBackendInfo].bi_type != NULL;
 138                 nBackendInfo++ )
 139         {
 140                 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 141
 142                 if(rc != 0) {
 143 #ifdef NEW_LOGGING
 144                         LDAP_LOG( BACKEND, INFO,
 145                                 "backend_init:  initialized for type \"%s\"\n",
 146                                 binfo[nBackendInfo].bi_type, 0, 0 );
 147 #else
 148                         Debug( LDAP_DEBUG_ANY,
 149                                 "backend_init: initialized for type \"%s\"\n",
 150                                 binfo[nBackendInfo].bi_type, 0, 0 );
 151 #endif
 152                         /* destroy those we've already inited */
 153                         for( nBackendInfo--;
 154                                 nBackendInfo >= 0 ;
 155                                 nBackendInfo-- )
 156                         {
 157                                 if ( binfo[nBackendInfo].bi_destroy ) {
 158                                         binfo[nBackendInfo].bi_destroy(
 159                                                 &binfo[nBackendInfo] );
 160                                 }
 161                         }
 162                         return rc;
 163                 }
 164         }
 165
 166         if ( nBackendInfo > 0) {
 167                 backendInfo = binfo;
 168                 return 0;
 169         }
 170
 171 #ifdef SLAPD_MODULES
 172         return 0;
 173 #else
 174
 175 #ifdef NEW_LOGGING
 176         LDAP_LOG( BACKEND, ERR, "backend_init: failed\n", 0, 0, 0 );
 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, ERR,
 194                   "backend_add:  initialization for type \"%s\" failed\n",
 195                   aBackendInfo->bi_type, 0, 0 );
 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, INFO,
 235                         "backend_startup: %d databases to startup. \n", nBackendDB, 0, 0 );
 236 #else
 237                 Debug( LDAP_DEBUG_ANY,
 238                         "backend_startup: %d databases to startup.\n",
 239                         nBackendDB, 0, 0 );
 240 #endif
 241                 return 1;
 242         }
 243
 244         if(be != NULL) {
 245                 /* startup a specific backend database */
 246 #ifdef NEW_LOGGING
 247                 LDAP_LOG( BACKEND, DETAIL1, "backend_startup:  starting \"%s\"\n",
 248                            be->be_suffix[0].bv_val, 0, 0 );
 249 #else
 250                 Debug( LDAP_DEBUG_TRACE,
 251                         "backend_startup: starting \"%s\"\n",
 252                         be->be_suffix[0].bv_val, 0, 0 );
 253 #endif
 254
 255                 if ( be->bd_info->bi_open ) {
 256                         rc = be->bd_info->bi_open( be->bd_info );
 257                         if ( rc != 0 ) {
 258 #ifdef NEW_LOGGING
 259                                 LDAP_LOG( BACKEND, CRIT, "backend_startup: bi_open failed!\n", 0, 0, 0 );
 260 #else
 261                                 Debug( LDAP_DEBUG_ANY,
 262                                         "backend_startup: bi_open failed!\n",
 263                                         0, 0, 0 );
 264 #endif
 265
 266                                 return rc;
 267                         }
 268                 }
 269
 270                 if ( be->bd_info->bi_db_open ) {
 271                         rc = be->bd_info->bi_db_open( be );
 272                         if ( rc != 0 ) {
 273 #ifdef NEW_LOGGING
 274                                 LDAP_LOG( BACKEND, CRIT,
 275                                         "backend_startup: bi_db_open failed! (%d)\n", rc, 0, 0 );
 276 #else
 277                                 Debug( LDAP_DEBUG_ANY,
 278                                         "backend_startup: bi_db_open failed! (%d)\n",
 279                                         rc, 0, 0 );
 280 #endif
 281                                 return rc;
 282                         }
 283                 }
 284
 285                 return rc;
 286         }
 287
 288         /* open each backend type */
 289         for( i = 0; i < nBackendInfo; i++ ) {
 290                 if( backendInfo[i].bi_nDB == 0) {
 291                         /* no database of this type, don't open */
 292                         continue;
 293                 }
 294
 295                 if( backendInfo[i].bi_open ) {
 296                         rc = backendInfo[i].bi_open(
 297                                 &backendInfo[i] );
 298                         if ( rc != 0 ) {
 299 #ifdef NEW_LOGGING
 300                                 LDAP_LOG( BACKEND, CRIT,
 301                                         "backend_startup: bi_open %d failed!\n", i, 0, 0 );
 302 #else
 303                                 Debug( LDAP_DEBUG_ANY,
 304                                         "backend_startup: bi_open %d failed!\n",
 305                                         i, 0, 0 );
 306 #endif
 307                                 return rc;
 308                         }
 309                 }
 310         }
 311
 312         /* open each backend database */
 313         for( i = 0; i < nBackendDB; i++ ) {
 314                 /* append global access controls */
 315                 acl_append( &backendDB[i].be_acl, global_acl );
 316
 317                 if ( backendDB[i].bd_info->bi_db_open ) {
 318                         rc = backendDB[i].bd_info->bi_db_open(
 319                                 &backendDB[i] );
 320                         if ( rc != 0 ) {
 321 #ifdef NEW_LOGGING
 322                                 LDAP_LOG( BACKEND, CRIT,
 323                                         "backend_startup: bi_db_open(%d) failed! (%d)\n", i, rc, 0 );
 324 #else
 325                                 Debug( LDAP_DEBUG_ANY,
 326                                         "backend_startup: bi_db_open(%d) failed! (%d)\n",
 327                                         i, rc, 0 );
 328 #endif
 329                                 return rc;
 330                         }
 331                 }
 332         }
 333
 334         return rc;
 335 }
 336
 337 int backend_num( Backend *be )
 338 {
 339         int i;
 340
 341         if( be == NULL ) return -1;
 342
 343         for( i = 0; i < nBackendDB; i++ ) {
 344                 if( be == &backendDB[i] ) return i;
 345         }
 346         return -1;
 347 }
 348
 349 int backend_shutdown( Backend *be )
 350 {
 351         int i;
 352         int rc = 0;
 353
 354         if( be != NULL ) {
 355                 /* shutdown a specific backend database */
 356
 357                 if ( be->bd_info->bi_nDB == 0 ) {
 358                         /* no database of this type, we never opened it */
 359                         return 0;
 360                 }
 361
 362                 if ( be->bd_info->bi_db_close ) {
 363                         be->bd_info->bi_db_close( be );
 364                 }
 365
 366                 if( be->bd_info->bi_close ) {
 367                         be->bd_info->bi_close( be->bd_info );
 368                 }
 369
 370                 return 0;
 371         }
 372
 373         /* close each backend database */
 374         for( i = 0; i < nBackendDB; i++ ) {
 375                 if ( backendDB[i].bd_info->bi_db_close ) {
 376                         backendDB[i].bd_info->bi_db_close(
 377                                 &backendDB[i] );
 378                 }
 379
 380                 if(rc != 0) {
 381 #ifdef NEW_LOGGING
 382                         LDAP_LOG( BACKEND, NOTICE,
 383                                 "backend_shutdown: bi_close %s failed!\n",
 384                                 backendDB[i].be_type, 0, 0 );
 385 #else
 386                         Debug( LDAP_DEBUG_ANY,
 387                                 "backend_close: bi_close %s failed!\n",
 388                                 backendDB[i].be_type, 0, 0 );
 389 #endif
 390                 }
 391         }
 392
 393         /* close each backend type */
 394         for( i = 0; i < nBackendInfo; i++ ) {
 395                 if( backendInfo[i].bi_nDB == 0 ) {
 396                         /* no database of this type */
 397                         continue;
 398                 }
 399
 400                 if( backendInfo[i].bi_close ) {
 401                         backendInfo[i].bi_close(
 402                                 &backendInfo[i] );
 403                 }
 404         }
 405
 406         return 0;
 407 }
 408
 409 int backend_destroy(void)
 410 {
 411         int i;
 412         BackendDB *bd;
 413
 414         /* destroy each backend database */
 415         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 416                 if ( bd->bd_info->bi_db_destroy ) {
 417                         bd->bd_info->bi_db_destroy( bd );
 418                 }
 419                 ber_bvarray_free( bd->be_suffix );
 420                 ber_bvarray_free( bd->be_nsuffix );
 421                 if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 422                 if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 423                 if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 424                 acl_destroy( bd->be_acl, global_acl );
 425         }
 426         free( backendDB );
 427
 428         /* destroy each backend type */
 429         for( i = 0; i < nBackendInfo; i++ ) {
 430                 if( backendInfo[i].bi_destroy ) {
 431                         backendInfo[i].bi_destroy(
 432                                 &backendInfo[i] );
 433                 }
 434         }
 435
 436 #ifdef SLAPD_MODULES
 437         if (backendInfo != binfo) {
 438            free(backendInfo);
 439         }
 440 #endif /* SLAPD_MODULES */
 441
 442         nBackendInfo = 0;
 443         backendInfo = NULL;
 444
 445         return 0;
 446 }
 447
 448 BackendInfo* backend_info(const char *type)
 449 {
 450         int i;
 451
 452         /* search for the backend type */
 453         for( i = 0; i < nBackendInfo; i++ ) {
 454                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 455                         return &backendInfo[i];
 456                 }
 457         }
 458
 459         return NULL;
 460 }
 461
 462
 463 BackendDB *
 464 backend_db_init(
 465     const char  *type
 466 )
 467 {
 468         Backend *be;
 469         BackendInfo *bi = backend_info(type);
 470         int     rc = 0;
 471
 472         if( bi == NULL ) {
 473                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 474                 return NULL;
 475         }
 476
 477         backendDB = (BackendDB *) ch_realloc(
 478                         (char *) backendDB,
 479                     (nBackendDB + 1) * sizeof(Backend) );
 480
 481         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 482
 483         be = &backends[nbackends++];
 484
 485         be->bd_info = bi;
 486         be->be_def_limit = deflimit;
 487         be->be_dfltaccess = global_default_access;
 488
 489         be->be_restrictops = global_restrictops;
 490         be->be_requires = global_requires;
 491         be->be_ssf_set = global_ssf_set;
 492
 493         /* assign a default depth limit for alias deref */
 494         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 495
 496         if(bi->bi_db_init) {
 497                 rc = bi->bi_db_init( be );
 498         }
 499
 500         if(rc != 0) {
 501                 fprintf( stderr, "database init failed (%s)\n", type );
 502                 nbackends--;
 503                 return NULL;
 504         }
 505
 506         bi->bi_nDB++;
 507         return( be );
 508 }
 509
 510 void
 511 be_db_close( void )
 512 {
 513         int     i;
 514
 515         for ( i = 0; i < nbackends; i++ ) {
 516                 if ( backends[i].bd_info->bi_db_close ) {
 517                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 518                 }
 519         }
 520 }
 521
 522 Backend *
 523 select_backend(
 524         struct berval * dn,
 525         int manageDSAit,
 526         int noSubs )
 527 {
 528         int     i, j;
 529         ber_len_t len, dnlen = dn->bv_len;
 530         Backend *be = NULL;
 531
 532         for ( i = 0; i < nbackends; i++ ) {
 533                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 534                     backends[i].be_nsuffix[j].bv_val != NULL; j++ )
 535                 {
 536                         if (( backends[i].be_flags & SLAP_BFLAG_GLUE_SUBORDINATE )
 537                                 && noSubs )
 538                         {
 539                                 continue;
 540                         }
 541
 542                         len = backends[i].be_nsuffix[j].bv_len;
 543
 544                         if ( len > dnlen ) {
 545                                 /* suffix is longer than DN */
 546                                 continue;
 547                         }
 548
 549                         /*
 550                          * input DN is normalized, so the separator check
 551                          * need not look at escaping
 552                          */
 553                         if ( len && len < dnlen &&
 554                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 555                         {
 556                                 continue;
 557                         }
 558
 559                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 560                                 &dn->bv_val[dnlen-len] ) == 0 )
 561                         {
 562                                 if( be == NULL ) {
 563                                         be = &backends[i];
 564
 565                                         if( manageDSAit && len == dnlen ) {
 566                                                 continue;
 567                                         }
 568                                 } else {
 569                                         be = &backends[i];
 570                                 }
 571                                 return be;
 572                         }
 573                 }
 574         }
 575
 576         return be;
 577 }
 578
 579 int
 580 be_issuffix(
 581     Backend     *be,
 582     struct berval       *bvsuffix
 583 )
 584 {
 585         int     i;
 586
 587         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL; i++ ) {
 588                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 589                         return( 1 );
 590                 }
 591         }
 592
 593         return( 0 );
 594 }
 595
 596 int
 597 be_isroot( Backend *be, struct berval *ndn )
 598 {
 599         if ( !ndn->bv_len ) {
 600                 return( 0 );
 601         }
 602
 603         if ( !be->be_rootndn.bv_len ) {
 604                 return( 0 );
 605         }
 606
 607         return dn_match( &be->be_rootndn, ndn );
 608 }
 609
 610 int
 611 be_isupdate( Backend *be, struct berval *ndn )
 612 {
 613         if ( !ndn->bv_len ) {
 614                 return( 0 );
 615         }
 616
 617         if ( !be->be_update_ndn.bv_len ) {
 618                 return( 0 );
 619         }
 620
 621         return dn_match( &be->be_update_ndn, ndn );
 622 }
 623
 624 struct berval *
 625 be_root_dn( Backend *be )
 626 {
 627         return &be->be_rootdn;
 628 }
 629
 630 int
 631 be_isroot_pw( Backend *be,
 632         Connection *conn,
 633         struct berval *ndn,
 634         struct berval *cred )
 635 {
 636         int result;
 637
 638         if ( ! be_isroot( be, ndn ) ) {
 639                 return 0;
 640         }
 641
 642         if( be->be_rootpw.bv_len == 0 ) {
 643                 return 0;
 644         }
 645
 646 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 647         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 648 #ifdef SLAPD_SPASSWD
 649         lutil_passwd_sasl_conn = conn->c_sasl_context;
 650 #endif
 651 #endif
 652
 653         result = lutil_passwd( &be->be_rootpw, cred, NULL );
 654
 655 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 656 #ifdef SLAPD_SPASSWD
 657         lutil_passwd_sasl_conn = NULL;
 658 #endif
 659         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 660 #endif
 661
 662         return result == 0;
 663 }
 664
 665 int
 666 be_entry_release_rw(
 667         BackendDB *be,
 668         Connection *conn,
 669         Operation *op,
 670         Entry *e,
 671         int rw )
 672 {
 673         if ( be->be_release ) {
 674                 /* free and release entry from backend */
 675                 return be->be_release( be, conn, op, e, rw );
 676         } else {
 677                 /* free entry */
 678                 entry_free( e );
 679                 return 0;
 680         }
 681 }
 682
 683 int
 684 backend_unbind(
 685         Connection   *conn,
 686         Operation    *op
 687 )
 688 {
 689         int     i;
 690
 691         for ( i = 0; i < nbackends; i++ ) {
 692                 if ( backends[i].be_unbind ) {
 693                         (*backends[i].be_unbind)( &backends[i], conn, op );
 694                 }
 695         }
 696
 697         return 0;
 698 }
 699
 700 int
 701 backend_connection_init(
 702         Connection   *conn
 703 )
 704 {
 705         int     i;
 706
 707         for ( i = 0; i < nbackends; i++ ) {
 708                 if ( backends[i].be_connection_init ) {
 709                         (*backends[i].be_connection_init)( &backends[i], conn);
 710                 }
 711         }
 712
 713         return 0;
 714 }
 715
 716 int
 717 backend_connection_destroy(
 718         Connection   *conn
 719 )
 720 {
 721         int     i;
 722
 723         for ( i = 0; i < nbackends; i++ ) {
 724                 if ( backends[i].be_connection_destroy ) {
 725                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 726                 }
 727         }
 728
 729         return 0;
 730 }
 731
 732 static int
 733 backend_check_controls(
 734         Backend *be,
 735         Connection *conn,
 736         Operation *op,
 737         const char **text )
 738 {
 739         LDAPControl **ctrls = op->o_ctrls;
 740
 741         if( ctrls == NULL ) return LDAP_SUCCESS;
 742
 743         for( ; *ctrls != NULL ; ctrls++ ) {
 744                 if( (*ctrls)->ldctl_iscritical &&
 745                         !ldap_charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 746                 {
 747                         *text = "control unavailable in context";
 748                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 749                 }
 750         }
 751
 752         return LDAP_SUCCESS;
 753 }
 754
 755 int
 756 backend_check_restrictions(
 757         Backend *be,
 758         Connection *conn,
 759         Operation *op,
 760         struct berval *opdata,
 761         const char **text )
 762 {
 763         int rc;
 764         slap_mask_t restrictops;
 765         slap_mask_t requires;
 766         slap_mask_t opflag;
 767         slap_ssf_set_t *ssf;
 768         int updateop = 0;
 769         int starttls = 0;
 770         int session = 0;
 771
 772         if( be ) {
 773                 rc = backend_check_controls( be, conn, op, text );
 774
 775                 if( rc != LDAP_SUCCESS ) {
 776                         return rc;
 777                 }
 778
 779                 restrictops = be->be_restrictops;
 780                 requires = be->be_requires;
 781                 ssf = &be->be_ssf_set;
 782
 783         } else {
 784                 restrictops = global_restrictops;
 785                 requires = global_requires;
 786                 ssf = &global_ssf_set;
 787         }
 788
 789         switch( op->o_tag ) {
 790         case LDAP_REQ_ADD:
 791                 opflag = SLAP_RESTRICT_OP_ADD;
 792                 updateop++;
 793                 break;
 794         case LDAP_REQ_BIND:
 795                 opflag = SLAP_RESTRICT_OP_BIND;
 796                 session++;
 797                 break;
 798         case LDAP_REQ_COMPARE:
 799                 opflag = SLAP_RESTRICT_OP_COMPARE;
 800                 break;
 801         case LDAP_REQ_DELETE:
 802                 updateop++;
 803                 opflag = SLAP_RESTRICT_OP_DELETE;
 804                 break;
 805         case LDAP_REQ_EXTENDED:
 806                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 807
 808                 if( !opdata ) {
 809                         /* treat unspecified as a modify */
 810                         opflag = SLAP_RESTRICT_OP_MODIFY;
 811                         updateop++;
 812                         break;
 813                 }
 814
 815                 {
 816                         struct berval bv = BER_BVC( LDAP_EXOP_START_TLS );
 817                         if( bvmatch( opdata, &bv ) ) {
 818                                 session++;
 819                                 starttls++;
 820                                 break;
 821                         }
 822                 }
 823
 824                 {
 825                         struct berval bv = BER_BVC( LDAP_EXOP_X_WHO_AM_I );
 826                         if( bvmatch( opdata, &bv ) ) {
 827                                 break;
 828                         }
 829                 }
 830
 831                 /* treat everything else as a modify */
 832                 opflag = SLAP_RESTRICT_OP_MODIFY;
 833                 updateop++;
 834                 break;
 835
 836         case LDAP_REQ_MODIFY:
 837                 updateop++;
 838                 opflag = SLAP_RESTRICT_OP_MODIFY;
 839                 break;
 840         case LDAP_REQ_RENAME:
 841                 updateop++;
 842                 opflag = SLAP_RESTRICT_OP_RENAME;
 843                 break;
 844         case LDAP_REQ_SEARCH:
 845                 opflag = SLAP_RESTRICT_OP_SEARCH;
 846                 break;
 847         case LDAP_REQ_UNBIND:
 848                 session++;
 849                 opflag = 0;
 850                 break;
 851         default:
 852                 *text = "restrict operations internal error";
 853                 return LDAP_OTHER;
 854         }
 855
 856         if ( !starttls ) {
 857                 /* these checks don't apply to StartTLS */
 858
 859                 if( op->o_transport_ssf < ssf->sss_transport ) {
 860                         *text = "transport confidentiality required";
 861                         return LDAP_CONFIDENTIALITY_REQUIRED;
 862                 }
 863
 864                 if( op->o_tls_ssf < ssf->sss_tls ) {
 865                         *text = "TLS confidentiality required";
 866                         return LDAP_CONFIDENTIALITY_REQUIRED;
 867                 }
 868
 869
 870                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 871                         /* simple bind specific check */
 872                         if( op->o_ssf < ssf->sss_simple_bind ) {
 873                                 *text = "confidentiality required";
 874                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 875                         }
 876                 }
 877
 878                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 879                         /* these checks don't apply to SASL bind */
 880
 881                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 882                                 *text = "SASL confidentiality required";
 883                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 884                         }
 885
 886                         if( op->o_ssf < ssf->sss_ssf ) {
 887                                 *text = "confidentiality required";
 888                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 889                         }
 890                 }
 891
 892                 if( updateop ) {
 893                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 894                                 *text = "transport update confidentiality required";
 895                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 896                         }
 897
 898                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 899                                 *text = "TLS update confidentiality required";
 900                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 901                         }
 902
 903                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 904                                 *text = "SASL update confidentiality required";
 905                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 906                         }
 907
 908                         if( op->o_ssf < ssf->sss_update_ssf ) {
 909                                 *text = "update confidentiality required";
 910                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 911                         }
 912
 913                         if( op->o_ndn.bv_len == 0 ) {
 914                                 *text = "modifications require authentication";
 915                                 return LDAP_STRONG_AUTH_REQUIRED;
 916                         }
 917                 }
 918         }
 919
 920         if ( !session ) {
 921                 /* these checks don't apply to Bind, StartTLS, or Unbind */
 922
 923                 if( requires & SLAP_REQUIRE_STRONG ) {
 924                         /* should check mechanism */
 925                         if( ( op->o_transport_ssf < ssf->sss_transport
 926                                 && op->o_authmech.bv_len == 0 ) || op->o_dn.bv_len == 0 )
 927                         {
 928                                 *text = "strong authentication required";
 929                                 return LDAP_STRONG_AUTH_REQUIRED;
 930                         }
 931                 }
 932
 933                 if( requires & SLAP_REQUIRE_SASL ) {
 934                         if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 ) {
 935                                 *text = "SASL authentication required";
 936                                 return LDAP_STRONG_AUTH_REQUIRED;
 937                         }
 938                 }
 939
 940                 if( requires & SLAP_REQUIRE_AUTHC ) {
 941                         if( op->o_dn.bv_len == 0 ) {
 942                                 *text = "authentication required";
 943                                 return LDAP_UNWILLING_TO_PERFORM;
 944                         }
 945                 }
 946
 947                 if( requires & SLAP_REQUIRE_BIND ) {
 948                         int version;
 949                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 950                         version = conn->c_protocol;
 951                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 952
 953                         if( !version ) {
 954                                 /* no bind has occurred */
 955                                 *text = "BIND required";
 956                                 return LDAP_OPERATIONS_ERROR;
 957                         }
 958                 }
 959
 960                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 961                         if( op->o_protocol < LDAP_VERSION3 ) {
 962                                 /* no bind has occurred */
 963                                 *text = "operation restricted to LDAPv3 clients";
 964                                 return LDAP_OPERATIONS_ERROR;
 965                         }
 966                 }
 967         }
 968
 969         if( restrictops & opflag ) {
 970                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 971                         *text = "read operations restricted";
 972                 } else {
 973                         *text = "operation restricted";
 974                 }
 975                 return LDAP_UNWILLING_TO_PERFORM;
 976         }
 977
 978         return LDAP_SUCCESS;
 979 }
 980
 981 int backend_check_referrals(
 982         Backend *be,
 983         Connection *conn,
 984         Operation *op,
 985         struct berval *dn,
 986         struct berval *ndn )
 987 {
 988         int rc = LDAP_SUCCESS;
 989
 990         if( be->be_chk_referrals ) {
 991                 const char *text;
 992
 993                 rc = be->be_chk_referrals( be,
 994                         conn, op, dn, ndn, &text );
 995
 996                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 997                         send_ldap_result( conn, op, rc,
 998                                 NULL, text, NULL, NULL );
 999                 }
1000         }
1001
1002         return rc;
1003 }
1004
1005 int
1006 backend_group(
1007         Backend *be,
1008         Connection *conn,
1009         Operation *op,
1010         Entry   *target,
1011         struct berval *gr_ndn,
1012         struct berval *op_ndn,
1013         ObjectClass *group_oc,
1014         AttributeDescription *group_at
1015 )
1016 {
1017         GroupAssertion *g;
1018
1019         if ( op->o_abandon ) return SLAPD_ABANDON;
1020
1021         if ( !dn_match( &target->e_nname, gr_ndn ) ) {
1022                 /* we won't attempt to send it to a different backend */
1023
1024                 be = select_backend( gr_ndn, 0, 0 );
1025
1026                 if (be == NULL) {
1027                         return LDAP_NO_SUCH_OBJECT;
1028                 }
1029         }
1030
1031         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1032
1033         for (g = conn->c_groups; g; g=g->ga_next) {
1034                 if (g->ga_be != be || g->ga_oc != group_oc ||
1035                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
1036                         continue;
1037                 if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
1038                         break;
1039         }
1040
1041         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1042
1043         if (g) {
1044                 return g->ga_res;
1045         }
1046
1047         if( be->be_group ) {
1048                 int res = be->be_group( be, conn, op,
1049                         target, gr_ndn, op_ndn,
1050                         group_oc, group_at );
1051
1052                 if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1053                         g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
1054                         g->ga_be = be;
1055                         g->ga_oc = group_oc;
1056                         g->ga_at = group_at;
1057                         g->ga_res = res;
1058                         g->ga_len = gr_ndn->bv_len;
1059                         strcpy(g->ga_ndn, gr_ndn->bv_val);
1060                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1061                         g->ga_next = conn->c_groups;
1062                         conn->c_groups = g;
1063                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1064                 }
1065
1066                 return res;
1067         }
1068
1069         return LDAP_UNWILLING_TO_PERFORM;
1070 }
1071
1072 int
1073 backend_attribute(
1074         Backend *be,
1075         Connection *conn,
1076         Operation *op,
1077         Entry   *target,
1078         struct berval   *edn,
1079         AttributeDescription *entry_at,
1080         BerVarray *vals
1081 )
1082 {
1083         if ( target == NULL || !dn_match( &target->e_nname, edn ) ) {
1084                 /* we won't attempt to send it to a different backend */
1085
1086                 be = select_backend( edn, 0, 0 );
1087
1088                 if (be == NULL) {
1089                         return LDAP_NO_SUCH_OBJECT;
1090                 }
1091         }
1092
1093         if( be->be_attribute ) {
1094                 return be->be_attribute( be, conn, op, target, edn,
1095                         entry_at, vals );
1096         }
1097
1098         return LDAP_UNWILLING_TO_PERFORM;
1099 }
1100
1101 Attribute *backend_operational(
1102         Backend *be,
1103         Connection *conn,
1104         Operation *op,
1105         Entry *e,
1106         AttributeName *attrs,
1107         int opattrs     )
1108 {
1109         Attribute *a = NULL, **ap = &a;
1110
1111         /*
1112          * If operational attributes (allegedly) are required,
1113          * and the backend supports specific operational attributes,
1114          * add them to the attribute list
1115          */
1116         if ( opattrs || ( attrs &&
1117                 ad_inlist( slap_schema.si_ad_subschemaSubentry, attrs )) ) {
1118                 *ap = slap_operational_subschemaSubentry( be );
1119                 ap = &(*ap)->a_next;
1120         }
1121
1122         if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
1123                 ( void )be->be_operational( be, conn, op, e, attrs, opattrs, ap );
1124         }
1125
1126         return a;
1127 }
1128