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", LDAP_LEVEL_ERR,
 128                            "backend_init:  backend already initialized\n" ));
 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", LDAP_LEVEL_INFO,
 145                                 "backend_init:  initialized for type \"%s\"\n",
 146                                 binfo[nBackendInfo].bi_type ));
 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", LDAP_LEVEL_ERR,
 177                 "backend_init: failed\n" ));
 178 #else
 179         Debug( LDAP_DEBUG_ANY,
 180                 "backend_init: failed\n",
 181                 0, 0, 0 );
 182 #endif
 183
 184         return rc;
 185 #endif /* SLAPD_MODULES */
 186 }
 187
 188 int backend_add(BackendInfo *aBackendInfo)
 189 {
 190    int rc = 0;
 191
 192    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 193 #ifdef NEW_LOGGING
 194        LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 195                   "backend_add:  initialization for type \"%s\" failed\n",
 196                   aBackendInfo->bi_type ));
 197 #else
 198       Debug( LDAP_DEBUG_ANY,
 199              "backend_add: initialization for type \"%s\" failed\n",
 200              aBackendInfo->bi_type, 0, 0 );
 201 #endif
 202       return rc;
 203    }
 204
 205    /* now add the backend type to the Backend Info List */
 206    {
 207       BackendInfo *newBackendInfo = 0;
 208
 209       /* if backendInfo == binfo no deallocation of old backendInfo */
 210       if (backendInfo == binfo) {
 211          newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 212          AC_MEMCPY(newBackendInfo, backendInfo, sizeof(BackendInfo) *
 213                 nBackendInfo);
 214       } else {
 215          newBackendInfo = ch_realloc(backendInfo, sizeof(BackendInfo) *
 216                                      (nBackendInfo + 1));
 217       }
 218       AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 219              sizeof(BackendInfo));
 220       backendInfo = newBackendInfo;
 221       nBackendInfo++;
 222
 223       return 0;
 224    }
 225 }
 226
 227 int backend_startup(Backend *be)
 228 {
 229         int i;
 230         int rc = 0;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234 #ifdef NEW_LOGGING
 235                 LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
 236                            "backend_startup: %d databases to startup. \n",
 237                            nBackendDB ));
 238 #else
 239                 Debug( LDAP_DEBUG_ANY,
 240                         "backend_startup: %d databases to startup.\n",
 241                         nBackendDB, 0, 0 );
 242 #endif
 243                 return 1;
 244         }
 245
 246         if(be != NULL) {
 247                 /* startup a specific backend database */
 248 #ifdef NEW_LOGGING
 249                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 250                            "backend_startup:  starting \"%s\"\n",
 251                            be->be_suffix[0].bv_val ));
 252 #else
 253                 Debug( LDAP_DEBUG_TRACE,
 254                         "backend_startup: starting \"%s\"\n",
 255                         be->be_suffix[0].bv_val, 0, 0 );
 256 #endif
 257
 258                 if ( be->bd_info->bi_open ) {
 259                         rc = be->bd_info->bi_open( be->bd_info );
 260                 }
 261
 262                 if(rc != 0) {
 263 #ifdef NEW_LOGGING
 264                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 265                                    "backend_startup: bi_open failed!\n" ));
 266 #else
 267                         Debug( LDAP_DEBUG_ANY,
 268                                 "backend_startup: bi_open failed!\n",
 269                                 0, 0, 0 );
 270 #endif
 271
 272                         return rc;
 273                 }
 274
 275                 if ( be->bd_info->bi_db_open ) {
 276                         rc = be->bd_info->bi_db_open( be );
 277                 }
 278
 279                 if(rc != 0) {
 280 #ifdef NEW_LOGGING
 281                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 282                                 "backend_startup: bi_db_open failed! (%d)\n", rc ));
 283 #else
 284                         Debug( LDAP_DEBUG_ANY,
 285                                 "backend_startup: bi_db_open failed! (%d)\n",
 286                                 rc, 0, 0 );
 287 #endif
 288                         return rc;
 289                 }
 290
 291                 return rc;
 292         }
 293
 294         /* open each backend type */
 295         for( i = 0; i < nBackendInfo; i++ ) {
 296                 if( backendInfo[i].bi_nDB == 0) {
 297                         /* no database of this type, don't open */
 298                         continue;
 299                 }
 300
 301                 if( backendInfo[i].bi_open ) {
 302                         rc = backendInfo[i].bi_open(
 303                                 &backendInfo[i] );
 304                 }
 305
 306                 if(rc != 0) {
 307 #ifdef NEW_LOGGING
 308                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 309                                    "backend_startup: bi_open %d failed!\n", i ));
 310 #else
 311                         Debug( LDAP_DEBUG_ANY,
 312                                 "backend_startup: bi_open %d failed!\n",
 313                                 i, 0, 0 );
 314 #endif
 315                         return rc;
 316                 }
 317         }
 318
 319         /* open each backend database */
 320         for( i = 0; i < nBackendDB; i++ ) {
 321                 /* append global access controls */
 322                 acl_append( &backendDB[i].be_acl, global_acl );
 323
 324                 if ( backendDB[i].bd_info->bi_db_open ) {
 325                         rc = backendDB[i].bd_info->bi_db_open(
 326                                 &backendDB[i] );
 327                 }
 328
 329                 if(rc != 0) {
 330 #ifdef NEW_LOGGING
 331                         LDAP_LOG(( "backend", LDAP_LEVEL_CRIT,
 332                                 "backend_startup: bi_db_open(%d) failed! (%d)\n",
 333                                 i, rc ));
 334 #else
 335                         Debug( LDAP_DEBUG_ANY,
 336                                 "backend_startup: bi_db_open(%d) failed! (%d)\n",
 337                                 i, rc, 0 );
 338 #endif
 339                         return rc;
 340                 }
 341         }
 342
 343         return rc;
 344 }
 345
 346 int backend_num( Backend *be )
 347 {
 348         int i;
 349
 350         if( be == NULL ) return -1;
 351
 352         for( i = 0; i < nBackendDB; i++ ) {
 353                 if( be == &backendDB[i] ) return i;
 354         }
 355         return -1;
 356 }
 357
 358 int backend_shutdown( Backend *be )
 359 {
 360         int i;
 361         int rc = 0;
 362
 363         if( be != NULL ) {
 364                 /* shutdown a specific backend database */
 365
 366                 if ( be->bd_info->bi_nDB == 0 ) {
 367                         /* no database of this type, we never opened it */
 368                         return 0;
 369                 }
 370
 371                 if ( be->bd_info->bi_db_close ) {
 372                         be->bd_info->bi_db_close( be );
 373                 }
 374
 375                 if( be->bd_info->bi_close ) {
 376                         be->bd_info->bi_close( be->bd_info );
 377                 }
 378
 379                 return 0;
 380         }
 381
 382         /* close each backend database */
 383         for( i = 0; i < nBackendDB; i++ ) {
 384                 if ( backendDB[i].bd_info->bi_db_close ) {
 385                         backendDB[i].bd_info->bi_db_close(
 386                                 &backendDB[i] );
 387                 }
 388
 389                 if(rc != 0) {
 390 #ifdef NEW_LOGGING
 391                         LDAP_LOG(( "backend", LDAP_LEVEL_NOTICE,
 392                                    "backend_shutdown: bi_close %s failed!\n",
 393                                    backendDB[i].be_type ));
 394 #else
 395                         Debug( LDAP_DEBUG_ANY,
 396                                 "backend_close: bi_close %s failed!\n",
 397                                 backendDB[i].be_type, 0, 0 );
 398 #endif
 399                 }
 400         }
 401
 402         /* close each backend type */
 403         for( i = 0; i < nBackendInfo; i++ ) {
 404                 if( backendInfo[i].bi_nDB == 0 ) {
 405                         /* no database of this type */
 406                         continue;
 407                 }
 408
 409                 if( backendInfo[i].bi_close ) {
 410                         backendInfo[i].bi_close(
 411                                 &backendInfo[i] );
 412                 }
 413         }
 414
 415         return 0;
 416 }
 417
 418 int backend_destroy(void)
 419 {
 420         int i;
 421         BackendDB *bd;
 422
 423         /* destroy each backend database */
 424         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 425                 if ( bd->bd_info->bi_db_destroy ) {
 426                         bd->bd_info->bi_db_destroy( bd );
 427                 }
 428                 ber_bvarray_free( bd->be_suffix );
 429                 ber_bvarray_free( bd->be_nsuffix );
 430                 if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 431                 if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 432                 if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 433                 acl_destroy( bd->be_acl, global_acl );
 434         }
 435         free( backendDB );
 436
 437         /* destroy each backend type */
 438         for( i = 0; i < nBackendInfo; i++ ) {
 439                 if( backendInfo[i].bi_destroy ) {
 440                         backendInfo[i].bi_destroy(
 441                                 &backendInfo[i] );
 442                 }
 443         }
 444
 445 #ifdef SLAPD_MODULES
 446         if (backendInfo != binfo) {
 447            free(backendInfo);
 448         }
 449 #endif /* SLAPD_MODULES */
 450
 451         nBackendInfo = 0;
 452         backendInfo = NULL;
 453
 454         return 0;
 455 }
 456
 457 BackendInfo* backend_info(const char *type)
 458 {
 459         int i;
 460
 461         /* search for the backend type */
 462         for( i = 0; i < nBackendInfo; i++ ) {
 463                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 464                         return &backendInfo[i];
 465                 }
 466         }
 467
 468         return NULL;
 469 }
 470
 471
 472 BackendDB *
 473 backend_db_init(
 474     const char  *type
 475 )
 476 {
 477         Backend *be;
 478         BackendInfo *bi = backend_info(type);
 479         int     rc = 0;
 480
 481         if( bi == NULL ) {
 482                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 483                 return NULL;
 484         }
 485
 486         backendDB = (BackendDB *) ch_realloc(
 487                         (char *) backendDB,
 488                     (nBackendDB + 1) * sizeof(Backend) );
 489
 490         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 491
 492         be = &backends[nbackends++];
 493
 494         be->bd_info = bi;
 495         be->be_def_limit = deflimit;
 496         be->be_dfltaccess = global_default_access;
 497
 498         be->be_restrictops = global_restrictops;
 499         be->be_requires = global_requires;
 500         be->be_ssf_set = global_ssf_set;
 501
 502         /* assign a default depth limit for alias deref */
 503         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 504
 505         if(bi->bi_db_init) {
 506                 rc = bi->bi_db_init( be );
 507         }
 508
 509         if(rc != 0) {
 510                 fprintf( stderr, "database init failed (%s)\n", type );
 511                 nbackends--;
 512                 return NULL;
 513         }
 514
 515         bi->bi_nDB++;
 516         return( be );
 517 }
 518
 519 void
 520 be_db_close( void )
 521 {
 522         int     i;
 523
 524         for ( i = 0; i < nbackends; i++ ) {
 525                 if ( backends[i].bd_info->bi_db_close ) {
 526                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 527                 }
 528         }
 529 }
 530
 531 Backend *
 532 select_backend(
 533         struct berval * dn,
 534         int manageDSAit,
 535         int noSubs )
 536 {
 537         int     i, j;
 538         ber_len_t len, dnlen = dn->bv_len;
 539         Backend *be = NULL;
 540
 541         for ( i = 0; i < nbackends; i++ ) {
 542                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 543                     backends[i].be_nsuffix[j].bv_val != NULL; j++ )
 544                 {
 545                         if (( backends[i].be_flags & SLAP_BFLAG_GLUE_SUBORDINATE )
 546                                 && noSubs )
 547                         {
 548                                 continue;
 549                         }
 550
 551                         len = backends[i].be_nsuffix[j].bv_len;
 552
 553                         if ( len > dnlen ) {
 554                                 /* suffix is longer than DN */
 555                                 continue;
 556                         }
 557
 558                         /*
 559                          * input DN is normalized, so the separator check
 560                          * need not look at escaping
 561                          */
 562                         if ( len && len < dnlen &&
 563                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 564                         {
 565                                 continue;
 566                         }
 567
 568                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 569                                 &dn->bv_val[dnlen-len] ) == 0 )
 570                         {
 571                                 if( be == NULL ) {
 572                                         be = &backends[i];
 573
 574                                         if( manageDSAit && len == dnlen ) {
 575                                                 continue;
 576                                         }
 577                                 } else {
 578                                         be = &backends[i];
 579                                 }
 580                                 return be;
 581                         }
 582                 }
 583         }
 584
 585         return be;
 586 }
 587
 588 int
 589 be_issuffix(
 590     Backend     *be,
 591     struct berval       *bvsuffix
 592 )
 593 {
 594         int     i;
 595
 596         for ( i = 0; be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL; i++ ) {
 597                 if ( ber_bvcmp( &be->be_nsuffix[i], bvsuffix ) == 0 ) {
 598                         return( 1 );
 599                 }
 600         }
 601
 602         return( 0 );
 603 }
 604
 605 int
 606 be_isroot( Backend *be, struct berval *ndn )
 607 {
 608         if ( !ndn->bv_len ) {
 609                 return( 0 );
 610         }
 611
 612         if ( !be->be_rootndn.bv_len ) {
 613                 return( 0 );
 614         }
 615
 616         return dn_match( &be->be_rootndn, ndn );
 617 }
 618
 619 int
 620 be_isupdate( Backend *be, struct berval *ndn )
 621 {
 622         if ( !ndn->bv_len ) {
 623                 return( 0 );
 624         }
 625
 626         if ( !be->be_update_ndn.bv_len ) {
 627                 return( 0 );
 628         }
 629
 630         return dn_match( &be->be_update_ndn, ndn );
 631 }
 632
 633 struct berval *
 634 be_root_dn( Backend *be )
 635 {
 636         return &be->be_rootdn;
 637 }
 638
 639 int
 640 be_isroot_pw( Backend *be,
 641         Connection *conn,
 642         struct berval *ndn,
 643         struct berval *cred )
 644 {
 645         int result;
 646
 647         if ( ! be_isroot( be, ndn ) ) {
 648                 return 0;
 649         }
 650
 651         if( be->be_rootpw.bv_len == 0 ) {
 652                 return 0;
 653         }
 654
 655 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 656         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 657 #ifdef SLAPD_SPASSWD
 658         lutil_passwd_sasl_conn = conn->c_sasl_context;
 659 #endif
 660 #endif
 661
 662         result = lutil_passwd( &be->be_rootpw, cred, NULL );
 663
 664 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 665 #ifdef SLAPD_SPASSWD
 666         lutil_passwd_sasl_conn = NULL;
 667 #endif
 668         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 669 #endif
 670
 671         return result == 0;
 672 }
 673
 674 int
 675 be_entry_release_rw(
 676         BackendDB *be,
 677         Connection *conn,
 678         Operation *op,
 679         Entry *e,
 680         int rw )
 681 {
 682         if ( be->be_release ) {
 683                 /* free and release entry from backend */
 684                 return be->be_release( be, conn, op, e, rw );
 685         } else {
 686                 /* free entry */
 687                 entry_free( e );
 688                 return 0;
 689         }
 690 }
 691
 692 int
 693 backend_unbind(
 694         Connection   *conn,
 695         Operation    *op
 696 )
 697 {
 698         int     i;
 699
 700         for ( i = 0; i < nbackends; i++ ) {
 701                 if ( backends[i].be_unbind ) {
 702                         (*backends[i].be_unbind)( &backends[i], conn, op );
 703                 }
 704         }
 705
 706         return 0;
 707 }
 708
 709 int
 710 backend_connection_init(
 711         Connection   *conn
 712 )
 713 {
 714         int     i;
 715
 716         for ( i = 0; i < nbackends; i++ ) {
 717                 if ( backends[i].be_connection_init ) {
 718                         (*backends[i].be_connection_init)( &backends[i], conn);
 719                 }
 720         }
 721
 722         return 0;
 723 }
 724
 725 int
 726 backend_connection_destroy(
 727         Connection   *conn
 728 )
 729 {
 730         int     i;
 731
 732         for ( i = 0; i < nbackends; i++ ) {
 733                 if ( backends[i].be_connection_destroy ) {
 734                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 735                 }
 736         }
 737
 738         return 0;
 739 }
 740
 741 static int
 742 backend_check_controls(
 743         Backend *be,
 744         Connection *conn,
 745         Operation *op,
 746         const char **text )
 747 {
 748         LDAPControl **ctrls;
 749         ctrls = op->o_ctrls;
 750         if( ctrls == NULL ) {
 751                 return LDAP_SUCCESS;
 752         }
 753
 754         for( ; *ctrls != NULL ; ctrls++ ) {
 755                 if( (*ctrls)->ldctl_iscritical &&
 756                         !charray_inlist( be->be_controls, (*ctrls)->ldctl_oid ) )
 757                 {
 758                         *text = "control unavailable in context";
 759                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 760                 }
 761         }
 762
 763         return LDAP_SUCCESS;
 764 }
 765
 766 int
 767 backend_check_restrictions(
 768         Backend *be,
 769         Connection *conn,
 770         Operation *op,
 771         struct berval *opdata,
 772         const char **text )
 773 {
 774         int rc;
 775         slap_mask_t restrictops;
 776         slap_mask_t requires;
 777         slap_mask_t opflag;
 778         slap_ssf_set_t *ssf;
 779         int updateop = 0;
 780         int starttls = 0;
 781         int session = 0;
 782
 783         if( be ) {
 784                 rc = backend_check_controls( be, conn, op, text );
 785
 786                 if( rc != LDAP_SUCCESS ) {
 787                         return rc;
 788                 }
 789
 790                 restrictops = be->be_restrictops;
 791                 requires = be->be_requires;
 792                 ssf = &be->be_ssf_set;
 793
 794         } else {
 795                 restrictops = global_restrictops;
 796                 requires = global_requires;
 797                 ssf = &global_ssf_set;
 798         }
 799
 800         switch( op->o_tag ) {
 801         case LDAP_REQ_ADD:
 802                 opflag = SLAP_RESTRICT_OP_ADD;
 803                 updateop++;
 804                 break;
 805         case LDAP_REQ_BIND:
 806                 opflag = SLAP_RESTRICT_OP_BIND;
 807                 session++;
 808                 break;
 809         case LDAP_REQ_COMPARE:
 810                 opflag = SLAP_RESTRICT_OP_COMPARE;
 811                 break;
 812         case LDAP_REQ_DELETE:
 813                 updateop++;
 814                 opflag = SLAP_RESTRICT_OP_DELETE;
 815                 break;
 816         case LDAP_REQ_EXTENDED:
 817                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 818
 819                 if( !opdata ) {
 820                         /* treat unspecified as a modify */
 821                         opflag = SLAP_RESTRICT_OP_MODIFY;
 822                         updateop++;
 823                         break;
 824                 }
 825
 826                 {
 827                         struct berval bv = BER_BVC( LDAP_EXOP_START_TLS );
 828                         if( ber_bvcmp( opdata, &bv ) == 0 ) {
 829                                 session++;
 830                                 starttls++;
 831                                 break;
 832                         }
 833                 }
 834
 835                 {
 836                         struct berval bv = BER_BVC( LDAP_EXOP_X_WHO_AM_I );
 837                         if( ber_bvcmp( opdata, &bv ) == 0 ) {
 838                                 break;
 839                         }
 840                 }
 841
 842                 /* treat everything else as a modify */
 843                 opflag = SLAP_RESTRICT_OP_MODIFY;
 844                 updateop++;
 845                 break;
 846
 847         case LDAP_REQ_MODIFY:
 848                 updateop++;
 849                 opflag = SLAP_RESTRICT_OP_MODIFY;
 850                 break;
 851         case LDAP_REQ_RENAME:
 852                 updateop++;
 853                 opflag = SLAP_RESTRICT_OP_RENAME;
 854                 break;
 855         case LDAP_REQ_SEARCH:
 856                 opflag = SLAP_RESTRICT_OP_SEARCH;
 857                 break;
 858         case LDAP_REQ_UNBIND:
 859                 session++;
 860                 opflag = 0;
 861                 break;
 862         default:
 863                 *text = "restrict operations internal error";
 864                 return LDAP_OTHER;
 865         }
 866
 867         if ( !starttls ) {
 868                 /* these checks don't apply to StartTLS */
 869
 870                 if( op->o_transport_ssf < ssf->sss_transport ) {
 871                         *text = "transport confidentiality required";
 872                         return LDAP_CONFIDENTIALITY_REQUIRED;
 873                 }
 874
 875                 if( op->o_tls_ssf < ssf->sss_tls ) {
 876                         *text = "TLS confidentiality required";
 877                         return LDAP_CONFIDENTIALITY_REQUIRED;
 878                 }
 879
 880                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 881                         /* these checks don't apply to SASL bind */
 882
 883                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 884                                 *text = "SASL confidentiality required";
 885                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 886                         }
 887
 888                         if( op->o_ssf < ssf->sss_ssf ) {
 889                                 *text = "confidentiality required";
 890                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 891                         }
 892                 }
 893
 894                 if( updateop ) {
 895                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
 896                                 *text = "transport update confidentiality required";
 897                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 898                         }
 899
 900                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
 901                                 *text = "TLS update confidentiality required";
 902                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 903                         }
 904
 905                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
 906                                 *text = "SASL update confidentiality required";
 907                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 908                         }
 909
 910                         if( op->o_ssf < ssf->sss_update_ssf ) {
 911                                 *text = "update confidentiality required";
 912                                 return LDAP_CONFIDENTIALITY_REQUIRED;
 913                         }
 914
 915                         if( op->o_ndn.bv_len == 0 ) {
 916                                 *text = "modifications require authentication";
 917                                 return LDAP_OPERATIONS_ERROR;
 918                         }
 919                 }
 920         }
 921
 922         if ( !session ) {
 923                 /* these checks don't apply to Bind, StartTLS, or Unbind */
 924
 925                 if( requires & SLAP_REQUIRE_STRONG ) {
 926                         /* should check mechanism */
 927                         if( ( op->o_transport_ssf < ssf->sss_transport
 928                                 && op->o_authmech.bv_len == 0 ) || op->o_dn.bv_len == 0 )
 929                         {
 930                                 *text = "strong authentication required";
 931                                 return LDAP_STRONG_AUTH_REQUIRED;
 932                         }
 933                 }
 934
 935                 if( requires & SLAP_REQUIRE_SASL ) {
 936                         if( op->o_authmech.bv_len == 0 || op->o_dn.bv_len == 0 ) {
 937                                 *text = "SASL authentication required";
 938                                 return LDAP_STRONG_AUTH_REQUIRED;
 939                         }
 940                 }
 941
 942                 if( requires & SLAP_REQUIRE_AUTHC ) {
 943                         if( op->o_dn.bv_len == 0 ) {
 944                                 *text = "authentication required";
 945                                 return LDAP_UNWILLING_TO_PERFORM;
 946                         }
 947                 }
 948
 949                 if( requires & SLAP_REQUIRE_BIND ) {
 950                         int version;
 951                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 952                         version = conn->c_protocol;
 953                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 954
 955                         if( !version ) {
 956                                 /* no bind has occurred */
 957                                 *text = "BIND required";
 958                                 return LDAP_OPERATIONS_ERROR;
 959                         }
 960                 }
 961
 962                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
 963                         if( op->o_protocol < LDAP_VERSION3 ) {
 964                                 /* no bind has occurred */
 965                                 *text = "operation restricted to LDAPv3 clients";
 966                                 return LDAP_OPERATIONS_ERROR;
 967                         }
 968                 }
 969         }
 970
 971         if( restrictops & opflag ) {
 972                 if( restrictops == SLAP_RESTRICT_OP_READS ) {
 973                         *text = "read operations restricted";
 974                 } else {
 975                         *text = "operation restricted";
 976                 }
 977                 return LDAP_UNWILLING_TO_PERFORM;
 978         }
 979
 980         return LDAP_SUCCESS;
 981 }
 982
 983 int backend_check_referrals(
 984         Backend *be,
 985         Connection *conn,
 986         Operation *op,
 987         struct berval *dn,
 988         struct berval *ndn )
 989 {
 990         int rc = LDAP_SUCCESS;
 991
 992         if( be->be_chk_referrals ) {
 993                 const char *text;
 994
 995                 rc = be->be_chk_referrals( be,
 996                         conn, op, dn, ndn, &text );
 997
 998                 if( rc != LDAP_SUCCESS && rc != LDAP_REFERRAL ) {
 999                         send_ldap_result( conn, op, rc,
1000                                 NULL, text, NULL, NULL );
1001                 }
1002         }
1003
1004         return rc;
1005 }
1006
1007 int
1008 backend_group(
1009         Backend *be,
1010         Connection *conn,
1011         Operation *op,
1012         Entry   *target,
1013         struct berval *gr_ndn,
1014         struct berval *op_ndn,
1015         ObjectClass *group_oc,
1016         AttributeDescription *group_at
1017 )
1018 {
1019         GroupAssertion *g;
1020
1021         if ( op->o_abandon ) return SLAPD_ABANDON;
1022
1023         if ( !dn_match( &target->e_nname, gr_ndn ) ) {
1024                 /* we won't attempt to send it to a different backend */
1025
1026                 be = select_backend( gr_ndn, 0, 0 );
1027
1028                 if (be == NULL) {
1029                         return LDAP_NO_SUCH_OBJECT;
1030                 }
1031         }
1032
1033         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1034         for (g = conn->c_groups; g; g=g->ga_next) {
1035                 if (g->ga_be != be || g->ga_oc != group_oc ||
1036                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
1037                         continue;
1038                 if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
1039                         break;
1040         }
1041         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1042         if (g) {
1043                 return g->ga_res;
1044         }
1045
1046         if( be->be_group ) {
1047                 int res = be->be_group( be, conn, op,
1048                         target, gr_ndn, op_ndn,
1049                         group_oc, group_at );
1050
1051                 if (op->o_tag != LDAP_REQ_BIND) {
1052                         g = ch_malloc(sizeof(GroupAssertion) + gr_ndn->bv_len);
1053                         g->ga_be = be;
1054                         g->ga_oc = group_oc;
1055                         g->ga_at = group_at;
1056                         g->ga_res = res;
1057                         g->ga_len = gr_ndn->bv_len;
1058                         strcpy(g->ga_ndn, gr_ndn->bv_val);
1059                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1060                         g->ga_next = conn->c_groups;
1061                         conn->c_groups = g;
1062                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1063                 }
1064
1065                 return res;
1066         }
1067
1068         return LDAP_UNWILLING_TO_PERFORM;
1069 }
1070
1071 int
1072 backend_attribute(
1073         Backend *be,
1074         Connection *conn,
1075         Operation *op,
1076         Entry   *target,
1077         struct berval   *edn,
1078         AttributeDescription *entry_at,
1079         BerVarray *vals
1080 )
1081 {
1082         if ( target == NULL || !dn_match( &target->e_nname, edn ) ) {
1083                 /* we won't attempt to send it to a different backend */
1084
1085                 be = select_backend( edn, 0, 0 );
1086
1087                 if (be == NULL) {
1088                         return LDAP_NO_SUCH_OBJECT;
1089                 }
1090         }
1091
1092         if( be->be_attribute ) {
1093                 return be->be_attribute( be, conn, op, target, edn,
1094                         entry_at, vals );
1095         }
1096
1097         return LDAP_UNWILLING_TO_PERFORM;
1098 }
1099
1100 Attribute *backend_operational(
1101         Backend *be,
1102         Connection *conn,
1103         Operation *op,
1104         Entry *e,
1105         AttributeName *attrs,
1106         int opattrs     )
1107 {
1108         Attribute *a = NULL, **ap = &a;
1109
1110 #ifdef SLAPD_SCHEMA_DN
1111         *ap = slap_operational_subschemaSubentry();
1112         ap = &(*ap)->a_next;
1113 #endif
1114
1115         /*
1116          * If operational attributes (allegedly) are required,
1117          * and the backend supports specific operational attributes,
1118          * add them to the attribute list
1119          */
1120         if ( ( opattrs || attrs ) && be && be->be_operational != NULL ) {
1121                 ( void )be->be_operational( be, conn, op, e, attrs, opattrs, ap );
1122         }
1123
1124         return a;
1125 }
1126