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