git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/search.c

   1 /* search.c - search operation */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "idl.h"
  15 #include "external.h"
  16
  17 static int base_candidate(
  18         BackendDB       *be,
  19         Entry   *e,
  20         ID              *ids );
  21 static int search_candidates(
  22         BackendDB *be,
  23         Operation *op,
  24         Entry *e,
  25         Filter *filter,
  26         int scope,
  27         int deref,
  28         ID      *ids );
  29 #ifdef LDAP_CONTROL_PAGEDRESULTS
  30 static void send_pagerequest_response(
  31         Connection      *conn,
  32         Operation *op,
  33         ID  lastid,
  34         int nentries );
  35 #endif /* LDAP_CONTROL_PAGEDRESULTS */
  36
  37 int
  38 bdb_search(
  39         BackendDB       *be,
  40         Connection      *conn,
  41         Operation       *op,
  42         struct berval   *base,
  43         struct berval   *nbase,
  44         int             scope,
  45         int             deref,
  46         int             slimit,
  47         int             tlimit,
  48         Filter  *filter,
  49         struct berval   *filterstr,
  50         AttributeName   *attrs,
  51         int             attrsonly )
  52 {
  53         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  54         int             rc;
  55         const char *text = NULL;
  56         time_t          stoptime;
  57         ID              id, cursor;
  58         ID              candidates[BDB_IDL_UM_SIZE];
  59         Entry           *e = NULL;
  60         BerVarray v2refs = NULL;
  61         Entry   *matched = NULL;
  62         struct berval   realbase = { 0, NULL };
  63         int             nentries = 0;
  64         int             manageDSAit;
  65 #ifdef LDAP_CONTROL_PAGEDRESULTS
  66         int             pagedresults;
  67         ID              lastid = NOID;
  68 #endif /* LDAP_CONTROL_PAGEDRESULTS */
  69
  70 #ifdef LDAP_CLIENT_UPDATE
  71         Filter lcupf, csnfnot, csnfeq, csnfand, csnfge;
  72         AttributeAssertion aa_ge, aa_eq;
  73         int             entry_count = 0;
  74         struct berval entrycsn_bv = { 0, NULL };
  75         struct berval latest_entrycsn_bv = { 0, NULL };
  76 #endif /* LDAP_CLIENT_UPDATE */
  77
  78         struct slap_limits_set *limit = NULL;
  79         int isroot = 0;
  80
  81         u_int32_t       locker;
  82         DB_LOCK         lock;
  83
  84 #ifdef NEW_LOGGING
  85         LDAP_LOG ( OPERATION, ENTRY, "bdb_back_search\n", 0, 0, 0 );
  86 #else
  87         Debug( LDAP_DEBUG_TRACE, "=> bdb_back_search\n",
  88                 0, 0, 0);
  89 #endif
  90
  91 #ifdef LDAP_CLIENT_UPDATE
  92         if ( op->o_clientupdate_type & SLAP_LCUP_PERSIST ) {
  93                 bdb_add_psearch_spec( be, conn, op, base, base, scope,
  94                         deref, slimit, tlimit, filter, filterstr, attrs, attrsonly );
  95                 return LDAP_SUCCESS;
  96         }
  97 #endif
  98
  99
 100         manageDSAit = get_manageDSAit( op );
 101
 102 #ifdef LDAP_CONTROL_PAGEDRESULTS
 103         pagedresults = get_pagedresults( op );
 104 #endif /* LDAP_CONTROL_PAGEDRESULTS */
 105
 106         rc = LOCK_ID (bdb->bi_dbenv, &locker );
 107         switch(rc) {
 108         case 0:
 109                 break;
 110         default:
 111                 send_ldap_result( conn, op, rc=LDAP_OTHER,
 112                         NULL, "internal error", NULL, NULL );
 113                 return rc;
 114         }
 115
 116         if ( nbase->bv_len == 0 ) {
 117                 /* DIT root special case */
 118                 e = (Entry *) &slap_entry_root;
 119                 rc = 0;
 120         } else
 121 #ifdef BDB_ALIASES
 122         /* get entry with reader lock */
 123         if ( deref & LDAP_DEREF_FINDING ) {
 124                 e = deref_dn_r( be, nbase-, &err, &matched, &text );
 125
 126         } else
 127 #endif
 128         {
 129 dn2entry_retry:
 130                 rc = bdb_dn2entry_r( be, NULL, nbase, &e, &matched, 0, locker, &lock );
 131         }
 132
 133         switch(rc) {
 134         case DB_NOTFOUND:
 135         case 0:
 136                 break;
 137         case LDAP_BUSY:
 138                 if (e != NULL) {
 139                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 140                 }
 141                 if (matched != NULL) {
 142                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 143                 }
 144                 send_ldap_result( conn, op, LDAP_BUSY,
 145                         NULL, "ldap server busy", NULL, NULL );
 146                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 147                 return LDAP_BUSY;
 148         case DB_LOCK_DEADLOCK:
 149         case DB_LOCK_NOTGRANTED:
 150                 goto dn2entry_retry;
 151         default:
 152                 if (e != NULL) {
 153                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 154                 }
 155                 if (matched != NULL) {
 156                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 157                 }
 158                 send_ldap_result( conn, op, rc=LDAP_OTHER,
 159                         NULL, "internal error", NULL, NULL );
 160                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 161                 return rc;
 162         }
 163
 164         if ( e == NULL ) {
 165                 struct berval matched_dn = { 0, NULL };
 166                 BerVarray refs = NULL;
 167
 168                 if ( matched != NULL ) {
 169                         BerVarray erefs;
 170                         ber_dupbv( &matched_dn, &matched->e_name );
 171
 172                         erefs = is_entry_referral( matched )
 173                                 ? get_entry_referrals( be, conn, op, matched )
 174                                 : NULL;
 175
 176                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 177                         matched = NULL;
 178
 179                         if( erefs ) {
 180                                 refs = referral_rewrite( erefs, &matched_dn,
 181                                         base, scope );
 182                                 ber_bvarray_free( erefs );
 183                         }
 184
 185                 } else {
 186                         refs = referral_rewrite( default_referral,
 187                                 NULL, base, scope );
 188                 }
 189
 190                 send_ldap_result( conn, op,     rc=LDAP_REFERRAL ,
 191                         matched_dn.bv_val, text, refs, NULL );
 192
 193                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 194                 if ( refs ) ber_bvarray_free( refs );
 195                 if ( matched_dn.bv_val ) ber_memfree( matched_dn.bv_val );
 196                 return rc;
 197         }
 198
 199         if (!manageDSAit && e != &slap_entry_root && is_entry_referral( e ) ) {
 200                 /* entry is a referral, don't allow add */
 201                 struct berval matched_dn;
 202                 BerVarray erefs, refs;
 203
 204                 ber_dupbv( &matched_dn, &e->e_name );
 205                 erefs = get_entry_referrals( be, conn, op, e );
 206                 refs = NULL;
 207
 208                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 209                 e = NULL;
 210
 211                 if( erefs ) {
 212                         refs = referral_rewrite( erefs, &matched_dn,
 213                                 base, scope );
 214                         ber_bvarray_free( erefs );
 215                 }
 216
 217 #ifdef NEW_LOGGING
 218                 LDAP_LOG ( OPERATION, RESULTS,
 219                         "bdb_search: entry is referral\n", 0, 0, 0 );
 220 #else
 221                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 222                         0, 0, 0 );
 223 #endif
 224
 225                 send_ldap_result( conn, op, LDAP_REFERRAL,
 226                         matched_dn.bv_val,
 227                         refs ? NULL : "bad referral object",
 228                         refs, NULL );
 229
 230                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 231                 ber_bvarray_free( refs );
 232                 ber_memfree( matched_dn.bv_val );
 233                 return 1;
 234         }
 235
 236         /* if not root, get appropriate limits */
 237         if ( be_isroot( be, &op->o_ndn ) ) {
 238                 isroot = 1;
 239         } else {
 240                 ( void ) get_limits( be, &op->o_ndn, &limit );
 241         }
 242
 243         /* The time/size limits come first because they require very little
 244          * effort, so there's no chance the candidates are selected and then
 245          * the request is not honored only because of time/size constraints */
 246
 247         /* if no time limit requested, use soft limit (unless root!) */
 248         if ( isroot ) {
 249                 if ( tlimit == 0 ) {
 250                         tlimit = -1;    /* allow root to set no limit */
 251                 }
 252
 253                 if ( slimit == 0 ) {
 254                         slimit = -1;
 255                 }
 256
 257         } else {
 258                 /* if no limit is required, use soft limit */
 259                 if ( tlimit <= 0 ) {
 260                         tlimit = limit->lms_t_soft;
 261
 262                 /* if requested limit higher than hard limit, abort */
 263                 } else if ( tlimit > limit->lms_t_hard ) {
 264                         /* no hard limit means use soft instead */
 265                         if ( limit->lms_t_hard == 0 && tlimit > limit->lms_t_soft ) {
 266                                 tlimit = limit->lms_t_soft;
 267
 268                         /* positive hard limit means abort */
 269                         } else if ( limit->lms_t_hard > 0 ) {
 270                                 send_search_result( conn, op,
 271                                                 LDAP_UNWILLING_TO_PERFORM,
 272                                                 NULL, NULL, NULL, NULL, 0 );
 273                                 rc = 0;
 274                                 goto done;
 275                         }
 276
 277                         /* negative hard limit means no limit */
 278                 }
 279
 280                 /* if no limit is required, use soft limit */
 281                 if ( slimit <= 0 ) {
 282                         slimit = limit->lms_s_soft;
 283
 284                 /* if requested limit higher than hard limit, abort */
 285                 } else if ( slimit > limit->lms_s_hard ) {
 286                         /* no hard limit means use soft instead */
 287                         if ( limit->lms_s_hard == 0 && slimit > limit->lms_s_soft ) {
 288                                 slimit = limit->lms_s_soft;
 289
 290                         /* positive hard limit means abort */
 291                         } else if ( limit->lms_s_hard > 0 ) {
 292                                 send_search_result( conn, op,
 293                                                 LDAP_UNWILLING_TO_PERFORM,
 294                                                 NULL, NULL, NULL, NULL, 0 );
 295                                 rc = 0;
 296                                 goto done;
 297                         }
 298
 299                         /* negative hard limit means no limit */
 300                 }
 301         }
 302
 303         /* compute it anyway; root does not use it */
 304         stoptime = op->o_time + tlimit;
 305
 306         /* select candidates */
 307         if ( scope == LDAP_SCOPE_BASE ) {
 308                 rc = base_candidate( be, e, candidates );
 309
 310         } else {
 311                 BDB_IDL_ALL( bdb, candidates );
 312                 rc = search_candidates( be, op, e, filter,
 313                         scope, deref, candidates );
 314         }
 315
 316         /* need normalized dn below */
 317         ber_dupbv( &realbase, &e->e_nname );
 318
 319         /* start cursor at beginning of candidates.
 320          */
 321         cursor = 0;
 322
 323         if ( e != &slap_entry_root ) {
 324                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 325         }
 326         e = NULL;
 327
 328         if ( candidates[0] == 0 ) {
 329 #ifdef NEW_LOGGING
 330                 LDAP_LOG ( OPERATION, RESULTS,
 331                         "bdb_search: no candidates\n", 0, 0, 0 );
 332 #else
 333                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 334                         0, 0, 0 );
 335 #endif
 336
 337                 send_search_result( conn, op,
 338                         LDAP_SUCCESS,
 339                         NULL, NULL, NULL, NULL, 0 );
 340
 341                 rc = 1;
 342                 goto done;
 343         }
 344
 345         /* if not root and candidates exceed to-be-checked entries, abort */
 346         if ( !isroot && limit->lms_s_unchecked != -1 ) {
 347                 if ( BDB_IDL_N(candidates) > (unsigned) limit->lms_s_unchecked ) {
 348                         send_search_result( conn, op,
 349                                         LDAP_ADMINLIMIT_EXCEEDED,
 350                                         NULL, NULL, NULL, NULL, 0 );
 351                         rc = 1;
 352                         goto done;
 353                 }
 354         }
 355
 356 #ifdef LDAP_CONTROL_PAGEDRESULTS
 357         if ( pagedresults ) {
 358                 if ( op->o_pagedresults_state.ps_cookie == 0 ) {
 359                         id = 0;
 360                 } else {
 361                         for ( id = bdb_idl_first( candidates, &cursor );
 362                                 id != NOID && id <= (ID)( op->o_pagedresults_state.ps_cookie );
 363                                 id = bdb_idl_next( candidates, &cursor ) );
 364                 }
 365                 if ( cursor == NOID ) {
 366 #ifdef NEW_LOGGING
 367                         LDAP_LOG ( OPERATION, RESULTS,
 368                                 "bdb_search: no paged results candidates\n",
 369                         0, 0, 0 );
 370 #else
 371                         Debug( LDAP_DEBUG_TRACE,
 372                                 "bdb_search: no paged results candidates\n",
 373                                 0, 0, 0 );
 374 #endif
 375                         send_pagerequest_response( conn, op, lastid, 0 );
 376
 377                         rc = 1;
 378                         goto done;
 379                 }
 380                 goto loop_begin;
 381         }
 382 #endif /* LDAP_CONTROL_PAGEDRESULTS */
 383
 384 #ifdef LDAP_CLIENT_UPDATE
 385         if ( op->o_clientupdate_type & SLAP_LCUP_SYNC ) {
 386                 lcupf.f_choice = LDAP_FILTER_AND;
 387                 lcupf.f_and = &csnfnot;
 388                 lcupf.f_next = NULL;
 389
 390                 csnfnot.f_choice = LDAP_FILTER_NOT;
 391                 csnfnot.f_not = &csnfeq;
 392                 csnfnot.f_next = &csnfand;
 393
 394                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 395                 csnfeq.f_ava = &aa_eq;
 396                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 397                 ber_dupbv( &csnfeq.f_av_value, &op->o_clientupdate_state );
 398
 399                 csnfand.f_choice = LDAP_FILTER_AND;
 400                 csnfand.f_and = &csnfge;
 401                 csnfand.f_next = NULL;
 402
 403                 csnfge.f_choice = LDAP_FILTER_GE;
 404                 csnfge.f_ava = &aa_ge;
 405                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 406                 ber_dupbv( &csnfge.f_av_value, &op->o_clientupdate_state );
 407                 csnfge.f_next = filter;
 408         }
 409 #endif /* LDAP_CLIENT_UPDATE */
 410
 411         for ( id = bdb_idl_first( candidates, &cursor );
 412                 id != NOID;
 413                 id = bdb_idl_next( candidates, &cursor ) )
 414         {
 415
 416                 int             scopeok = 0;
 417
 418 #ifdef LDAP_CONTROL_PAGEDRESULTS
 419 loop_begin:
 420 #endif /* LDAP_CONTROL_PAGEDRESULTS */
 421
 422                 /* check for abandon */
 423                 if ( op->o_abandon ) {
 424                         rc = 0;
 425                         goto done;
 426                 }
 427
 428                 /* check time limit */
 429                 if ( tlimit != -1 && slap_get_time() > stoptime ) {
 430                         send_search_result( conn, op, rc = LDAP_TIMELIMIT_EXCEEDED,
 431                                 NULL, NULL, v2refs, NULL, nentries );
 432                         goto done;
 433                 }
 434
 435 id2entry_retry:
 436                 /* get the entry with reader lock */
 437                 rc = bdb_id2entry_r( be, NULL, id, &e, locker, &lock );
 438
 439                 if (rc == LDAP_BUSY) {
 440                         send_ldap_result( conn, op, rc=LDAP_BUSY,
 441                                 NULL, "ldap server busy", NULL, NULL );
 442                         goto done;
 443
 444                 } else if ( rc == DB_LOCK_DEADLOCK || rc == DB_LOCK_NOTGRANTED ) {
 445                         goto id2entry_retry;
 446                 }
 447
 448                 if ( e == NULL ) {
 449                         if( !BDB_IDL_IS_RANGE(candidates) ) {
 450                                 /* only complain for non-range IDLs */
 451 #ifdef NEW_LOGGING
 452                                 LDAP_LOG ( OPERATION, RESULTS,
 453                                         "bdb_search: candidate %ld not found\n", (long) id, 0, 0);
 454 #else
 455                                 Debug( LDAP_DEBUG_TRACE,
 456                                         "bdb_search: candidate %ld not found\n",
 457                                         (long) id, 0, 0 );
 458 #endif
 459                         }
 460
 461                         goto loop_continue;
 462                 }
 463
 464 #ifdef BDB_SUBENTRIES
 465                 if ( is_entry_subentry( e ) ) {
 466                         if( scope != LDAP_SCOPE_BASE ) {
 467                                 if(!get_subentries_visibility( op )) {
 468                                         /* only subentries are visible */
 469                                         goto loop_continue;
 470                                 }
 471
 472                         } else if ( get_subentries( op ) &&
 473                                 !get_subentries_visibility( op ))
 474                         {
 475                                 /* only subentries are visible */
 476                                 goto loop_continue;
 477                         }
 478
 479                 } else if ( get_subentries_visibility( op )) {
 480                         /* only subentries are visible */
 481                         goto loop_continue;
 482                 }
 483 #endif
 484
 485 #ifdef BDB_ALIASES
 486                 if ( deref & LDAP_DEREF_SEARCHING && is_entry_alias( e ) ) {
 487                         Entry *matched;
 488                         int err;
 489                         const char *text;
 490
 491                         e = deref_entry_r( be, e, &err, &matched, &text );
 492
 493                         if( e == NULL ) {
 494                                 e = matched;
 495                                 goto loop_continue;
 496                         }
 497
 498                         if( e->e_id == id ) {
 499                                 /* circular loop */
 500                                 goto loop_continue;
 501                         }
 502
 503                         /* need to skip alias which deref into scope */
 504                         if( scope & LDAP_SCOPE_ONELEVEL ) {
 505                                 struct berval   pdn;
 506
 507                                 dnParent( &e->e_nname, &pdn ):
 508                                 if ( ber_bvcmp( pdn, &realbase ) ) {
 509                                         goto loop_continue;
 510                                 }
 511
 512                         } else if ( dnIsSuffix( &e->e_nname, &realbase ) ) {
 513                                 /* alias is within scope */
 514 #ifdef NEW_LOGGING
 515                                 LDAP_LOG ( OPERATION, RESULTS,
 516                                         "bdb_search: \"%s\" in subtree\n", e->edn, 0, 0);
 517 #else
 518                                 Debug( LDAP_DEBUG_TRACE,
 519                                         "bdb_search: \"%s\" in subtree\n",
 520                                         e->e_dn, 0, 0 );
 521 #endif
 522                                 goto loop_continue;
 523                         }
 524
 525                         scopeok = 1;
 526                 }
 527 #endif
 528
 529                 /*
 530                  * if it's a referral, add it to the list of referrals. only do
 531                  * this for non-base searches, and don't check the filter
 532                  * explicitly here since it's only a candidate anyway.
 533                  */
 534                 if ( !manageDSAit && scope != LDAP_SCOPE_BASE &&
 535                         is_entry_referral( e ) )
 536                 {
 537                         struct berval   dn;
 538
 539                         /* check scope */
 540                         if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
 541                                 if ( !be_issuffix( be, &e->e_nname ) ) {
 542                                         dnParent( &e->e_nname, &dn );
 543                                         scopeok = dn_match( &dn, &realbase );
 544                                 } else {
 545                                         scopeok = (realbase.bv_len == 0);
 546                                 }
 547
 548                         } else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
 549                                 scopeok = dnIsSuffix( &e->e_nname, &realbase );
 550
 551                         } else {
 552                                 scopeok = 1;
 553                         }
 554
 555                         if( scopeok ) {
 556                                 BerVarray erefs = get_entry_referrals(
 557                                         be, conn, op, e );
 558                                 BerVarray refs = referral_rewrite( erefs,
 559                                         &e->e_name, NULL,
 560                                         scope == LDAP_SCOPE_SUBTREE
 561                                                 ? LDAP_SCOPE_SUBTREE
 562                                                 : LDAP_SCOPE_BASE );
 563
 564                                 send_search_reference( be, conn, op,
 565                                         e, refs, NULL, &v2refs );
 566
 567                                 ber_bvarray_free( refs );
 568
 569                         } else {
 570 #ifdef NEW_LOGGING
 571                                 LDAP_LOG(OPERATION, DETAIL2,
 572                                         "bdb_search: candidate referral %ld scope not okay\n",
 573                                         id, 0, 0 );
 574 #else
 575                                 Debug( LDAP_DEBUG_TRACE,
 576                                         "bdb_search: candidate referral %ld scope not okay\n",
 577                                         id, 0, 0 );
 578 #endif
 579                         }
 580
 581                         goto loop_continue;
 582                 }
 583
 584                 /* if it matches the filter and scope, send it */
 585 #ifdef LDAP_CLIENT_UPDATE
 586                 if ( op->o_clientupdate_type & SLAP_LCUP_SYNC ) {
 587                         rc = test_filter( be, conn, op, e, &lcupf );
 588                 } else
 589 #endif /* LDAP_CLIENT_UPDATE */
 590                 {
 591                         rc = test_filter( be, conn, op, e, filter );
 592                 }
 593
 594                 if ( rc == LDAP_COMPARE_TRUE ) {
 595                         struct berval   dn;
 596
 597                         /* check scope */
 598                         if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
 599                                 if ( be_issuffix( be, &e->e_nname ) ) {
 600                                         scopeok = (realbase.bv_len == 0);
 601                                 } else {
 602                                         dnParent( &e->e_nname, &dn );
 603                                         scopeok = dn_match( &dn, &realbase );
 604                                 }
 605
 606                         } else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
 607                                 scopeok = dnIsSuffix( &e->e_nname, &realbase );
 608
 609                         } else {
 610                                 scopeok = 1;
 611                         }
 612
 613                         if ( scopeok ) {
 614                                 /* check size limit */
 615                                 if ( --slimit == -1 ) {
 616                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
 617                                                 &bdb->bi_cache, e, &lock );
 618                                         e = NULL;
 619                                         send_search_result( conn, op,
 620                                                 rc = LDAP_SIZELIMIT_EXCEEDED, NULL, NULL,
 621                                                 v2refs, NULL, nentries );
 622                                         goto done;
 623                                 }
 624 #ifdef LDAP_CONTROL_PAGEDRESULTS
 625                                 if ( pagedresults ) {
 626                                         if ( nentries >= op->o_pagedresults_size ) {
 627                                                 send_pagerequest_response( conn, op, lastid, nentries );
 628                                                 goto done;
 629                                         }
 630                                         lastid = id;
 631                                 }
 632 #endif /* LDAP_CONTROL_PAGEDRESULTS */
 633
 634                                 if (e) {
 635                                         int result;
 636
 637 #if 0   /* noop is masked SLAP_CTRL_UPDATE */
 638                                         if( op->o_noop ) {
 639                                                 result = 0;
 640                                         } else
 641 #endif
 642                                         {
 643 #ifdef LDAP_CLIENT_UPDATE
 644                                                 if ( op->o_clientupdate_type & SLAP_LCUP_SYNC ) {
 645                                                         Attribute* a;
 646                                                         int ret;
 647                                                         int res;
 648                                                         const char *text = NULL;
 649                                                         LDAPControl *ctrls[2];
 650                                                         struct berval *bv;
 651
 652                                                         BerElement *ber = ber_alloc_t( LBER_USE_DER );
 653
 654                                                         if ( ber == NULL ) {
 655 #ifdef NEW_LOGGING
 656                                                                 LDAP_LOG ( OPERATION, RESULTS,
 657                                                                         "bdb_search: ber_alloc_t failed\n",
 658                                                                         0, 0, 0 );
 659 #else
 660                                                                 Debug( LDAP_DEBUG_TRACE,
 661                                                                         "bdb_search: ber_alloc_t failed\n",
 662                                                                         0, 0, 0 );
 663 #endif
 664                                                                 send_ldap_result( conn, op, rc=LDAP_OTHER,
 665                                                                         NULL, "internal error", NULL, NULL );
 666                                                                 goto done;
 667                                                         }
 668
 669                                                         entry_count++;
 670
 671                                                         ctrls[0] = ch_malloc ( sizeof ( LDAPControl ) );
 672                                                         ctrls[1] = NULL;
 673
 674                                                         if ( entry_count % op->o_clientupdate_interval == 0 ) {
 675                                                                 /* Send cookie */
 676                                                                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 677                                                                         AttributeDescription *desc = a->a_desc;
 678                                                                         if ( desc == slap_schema.si_ad_entryCSN ) {
 679                                                                                 ber_dupbv( &entrycsn_bv, &a->a_vals[0] );
 680                                                                                 if ( latest_entrycsn_bv.bv_val == NULL ) {
 681                                                                                         ber_dupbv( &latest_entrycsn_bv, &entrycsn_bv );
 682                                                                                 } else {
 683                                                                                         res = value_match( &ret, desc,
 684                                                                                                 desc->ad_type->sat_ordering,
 685                                                                                                 SLAP_MR_ASSERTION_SYNTAX_MATCH,
 686                                                                                                 &entrycsn_bv, &latest_entrycsn_bv, &text );
 687                                                                                         if ( res != LDAP_SUCCESS ) {
 688                                                                                                 ret = 0;
 689 #ifdef NEW_LOGGING
 690                                                                                                 LDAP_LOG ( OPERATION, RESULTS,
 691                                                                                                         "bdb_search: value_match failed\n",
 692                                                                                                         0, 0, 0 );
 693 #else
 694                                                                                                 Debug( LDAP_DEBUG_TRACE,
 695                                                                                                         "bdb_search: value_match failed\n",
 696                                                                                                         0, 0, 0 );
 697 #endif
 698                                                                                         }
 699
 700                                                                                         if ( ret > 0 ) {
 701                                                                                                 ch_free( latest_entrycsn_bv.bv_val );
 702                                                                                                 latest_entrycsn_bv.bv_val = NULL;
 703                                                                                                 ber_dupbv( &latest_entrycsn_bv,
 704                                                                                                         &entrycsn_bv );
 705                                                                                         }
 706                                                                                 }
 707                                                                         }
 708                                                                 }
 709
 710                                                                 ber_printf( ber,
 711                                                                         "{bb{sON}N}",
 712                                                                         SLAP_LCUP_STATE_UPDATE_FALSE,
 713                                                                         SLAP_LCUP_ENTRY_DELETED_FALSE,
 714                                                                         LCUP_COOKIE_OID, &entrycsn_bv );
 715
 716                                                                 ch_free( entrycsn_bv.bv_val );
 717                                                                 entrycsn_bv.bv_val = NULL;
 718
 719                                                         } else {
 720                                                                 /* Do not send cookie */
 721                                                                 ber_printf( ber,
 722                                                                         "{bbN}",
 723                                                                         SLAP_LCUP_STATE_UPDATE_FALSE,
 724                                                                         SLAP_LCUP_ENTRY_DELETED_FALSE );
 725                                                         }
 726
 727                                                         ctrls[0]->ldctl_oid = LDAP_CONTROL_ENTRY_UPDATE;
 728                                                         ctrls[0]->ldctl_iscritical = op->o_clientupdate;
 729                                                         ret = ber_flatten( ber, &bv );
 730
 731                                                         if ( ret < 0 ) {
 732 #ifdef NEW_LOGGING
 733                                                                 LDAP_LOG ( OPERATION, RESULTS,
 734                                                                         "bdb_search: ber_flatten failed\n",
 735                                                                         0, 0, 0 );
 736 #else
 737                                                                 Debug( LDAP_DEBUG_TRACE,
 738                                                                         "bdb_search: ber_flatten failed\n",
 739                                                                         0, 0, 0 );
 740 #endif
 741                                                                 send_ldap_result( conn, op, rc=LDAP_OTHER,
 742                                                                         NULL, "internal error", NULL, NULL );
 743                                                                 goto done;
 744                                                         }
 745
 746                                                         ber_dupbv( &ctrls[0]->ldctl_value, bv );
 747
 748                                                         result = send_search_entry( be, conn, op,
 749                                                                 e, attrs, attrsonly, ctrls);
 750
 751                                                         ch_free( ctrls[0]->ldctl_value.bv_val );
 752                                                         ch_free( ctrls[0] );
 753                                                         ber_free( ber, 1 );
 754                                                         ber_bvfree( bv );
 755                                                 } else
 756 #endif /* LDAP_CLIENT_UPDATE */
 757                                                 {
 758                                                         result = send_search_entry( be, conn, op,
 759                                                                 e, attrs, attrsonly, NULL);
 760                                                 }
 761                                         }
 762
 763                                         switch (result) {
 764                                         case 0:         /* entry sent ok */
 765                                                 nentries++;
 766                                                 break;
 767                                         case 1:         /* entry not sent */
 768                                                 break;
 769                                         case -1:        /* connection closed */
 770                                                 bdb_cache_return_entry_r(bdb->bi_dbenv,
 771                                                         &bdb->bi_cache, e, &lock);
 772                                                 e = NULL;
 773                                                 rc = LDAP_OTHER;
 774                                                 goto done;
 775                                         }
 776                                 }
 777                         } else {
 778 #ifdef NEW_LOGGING
 779                                 LDAP_LOG ( OPERATION, RESULTS,
 780                                         "bdb_search: %ld scope not okay\n", (long) id, 0, 0);
 781 #else
 782                                 Debug( LDAP_DEBUG_TRACE,
 783                                         "bdb_search: %ld scope not okay\n",
 784                                         (long) id, 0, 0 );
 785 #endif
 786                         }
 787                 } else {
 788 #ifdef NEW_LOGGING
 789                         LDAP_LOG ( OPERATION, RESULTS,
 790                                 "bdb_search: %ld does match filter\n", (long) id, 0, 0);
 791 #else
 792                         Debug( LDAP_DEBUG_TRACE,
 793                                 "bdb_search: %ld does match filter\n",
 794                                 (long) id, 0, 0 );
 795 #endif
 796                 }
 797
 798 loop_continue:
 799                 if( e != NULL ) {
 800                         /* free reader lock */
 801                         bdb_cache_return_entry_r( bdb->bi_dbenv,
 802                                 &bdb->bi_cache, e , &lock);
 803                         e = NULL;
 804                 }
 805
 806                 ldap_pvt_thread_yield();
 807         }
 808
 809 #ifdef LDAP_CLIENT_UPDATE
 810         if ( op->o_clientupdate_type & SLAP_LCUP_SYNC ) {
 811                 int ret;
 812                 LDAPControl *ctrls[2];
 813                 BerElement *ber = ber_alloc_t( LBER_USE_DER );
 814                 struct berval *bv;
 815
 816                 if ( ber == NULL ) {
 817 #ifdef NEW_LOGGING
 818                         LDAP_LOG ( OPERATION, RESULTS,
 819                                 "bdb_search: ber_alloc_t failed\n", 0, 0, 0 );
 820 #else
 821                         Debug( LDAP_DEBUG_TRACE, "bdb_search: ber_alloc_t failed\n",
 822                                 0, 0, 0 );
 823 #endif
 824                         send_ldap_result( conn, op, rc=LDAP_OTHER,
 825                                 NULL, "internal error", NULL, NULL );
 826                         goto done;
 827                 }
 828
 829                 ctrls[0] = ch_malloc ( sizeof ( LDAPControl ) );
 830                 ctrls[1] = NULL;
 831
 832                 ber_printf( ber, "{sO", LCUP_COOKIE_OID, &latest_entrycsn_bv );
 833                 ber_printf( ber, "N}" );
 834
 835                 ctrls[0]->ldctl_oid = LDAP_CONTROL_CLIENT_UPDATE_DONE;
 836                 ctrls[0]->ldctl_iscritical = op->o_clientupdate;
 837                 ret = ber_flatten( ber, &bv );
 838
 839                 if ( ret < 0 ) {
 840 #ifdef NEW_LOGGING
 841                         LDAP_LOG ( OPERATION, RESULTS,
 842                                 "bdb_search: ber_flatten failed\n", 0, 0, 0 );
 843 #else
 844                         Debug( LDAP_DEBUG_TRACE, "bdb_search: ber_flatten failed\n",
 845                                 0, 0, 0 );
 846 #endif
 847                         send_ldap_result( conn, op, rc=LDAP_OTHER,
 848                                 NULL, "internal error", NULL, NULL );
 849                         goto done;
 850                 }
 851
 852                 ber_dupbv( &ctrls[0]->ldctl_value, bv );
 853
 854                 send_search_result( conn, op,
 855                         v2refs == NULL ? LDAP_SUCCESS : LDAP_REFERRAL,
 856                         NULL, NULL, v2refs, ctrls, nentries );
 857
 858                 ch_free( latest_entrycsn_bv.bv_val );
 859                 latest_entrycsn_bv.bv_val = NULL;
 860                 ch_free( ctrls[0]->ldctl_value.bv_val );
 861                 ch_free( ctrls[0] );
 862                 ber_free( ber, 1 );
 863                 ber_bvfree( bv );
 864         } else
 865 #endif /* LDAP_CLIENT_UPDATE */
 866         {
 867                 send_search_result( conn, op,
 868                         v2refs == NULL ? LDAP_SUCCESS : LDAP_REFERRAL,
 869                         NULL, NULL, v2refs, NULL, nentries );
 870         }
 871
 872         rc = 0;
 873
 874 done:
 875         if( e != NULL ) {
 876                 /* free reader lock */
 877                 bdb_cache_return_entry_r ( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 878         }
 879
 880 #ifdef LDAP_CLIENT_UPDATE
 881         if ( op->o_clientupdate_type & SLAP_LCUP_SYNC ) {
 882                 if ( csnfeq.f_ava != NULL && csnfeq.f_av_value.bv_val != NULL ) {
 883                         ch_free( csnfeq.f_av_value.bv_val );
 884                 }
 885
 886                 if ( csnfge.f_ava != NULL && csnfge.f_av_value.bv_val != NULL ) {
 887                         ch_free( csnfge.f_av_value.bv_val );
 888                 }
 889         }
 890 #endif /* LDAP_CLIENT_UPDATE */
 891
 892         LOCK_ID_FREE (bdb->bi_dbenv, locker );
 893
 894         if( v2refs ) ber_bvarray_free( v2refs );
 895         if( realbase.bv_val ) ch_free( realbase.bv_val );
 896
 897         return rc;
 898 }
 899
 900
 901 static int base_candidate(
 902         BackendDB       *be,
 903         Entry   *e,
 904         ID              *ids )
 905 {
 906 #ifdef NEW_LOGGING
 907         LDAP_LOG ( OPERATION, ENTRY,
 908                 "base_candidate: base: \"%s\" (0x%08lx)\n", e->e_dn, (long) e->e_id, 0);
 909 #else
 910         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
 911                 e->e_dn, (long) e->e_id, 0);
 912 #endif
 913
 914         ids[0] = 1;
 915         ids[1] = e->e_id;
 916         return 0;
 917 }
 918
 919 /* Look for "objectClass Present" in this filter.
 920  * Also count depth of filter tree while we're at it.
 921  */
 922 static int oc_filter(
 923         Filter *f,
 924         int cur,
 925         int *max
 926 )
 927 {
 928         int rc = 0;
 929
 930         if( cur > *max ) *max = cur;
 931
 932         switch(f->f_choice) {
 933         case LDAP_FILTER_PRESENT:
 934                 if (f->f_desc == slap_schema.si_ad_objectClass) {
 935                         rc = 1;
 936                 }
 937                 break;
 938
 939         case LDAP_FILTER_AND:
 940         case LDAP_FILTER_OR:
 941                 cur++;
 942                 for (f=f->f_and; f; f=f->f_next) {
 943                         (void) oc_filter(f, cur, max);
 944                 }
 945                 break;
 946
 947         default:
 948                 break;
 949         }
 950         return rc;
 951 }
 952
 953 static int search_candidates(
 954         BackendDB *be,
 955         Operation *op,
 956         Entry *e,
 957         Filter *filter,
 958         int scope,
 959         int deref,
 960         ID      *ids )
 961 {
 962         int rc, depth = 1;
 963         Filter          f, scopef, rf, xf;
 964         ID              *stack;
 965         AttributeAssertion aa_ref;
 966 #ifdef BDB_SUBENTRIES
 967         Filter  sf;
 968         AttributeAssertion aa_subentry;
 969 #endif
 970 #ifdef BDB_ALIASES
 971         Filter  af;
 972         AttributeAssertion aa_alias;
 973 #endif
 974
 975         /*
 976          * This routine takes as input a filter (user-filter)
 977          * and rewrites it as follows:
 978          *      (&(scope=DN)[(objectClass=subentry)]
 979          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
 980          */
 981
 982 #ifdef NEW_LOGGING
 983         LDAP_LOG ( OPERATION, ENTRY,
 984                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
 985                 e->e_dn, (long) e->e_id, scope);
 986 #else
 987         Debug(LDAP_DEBUG_TRACE,
 988                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
 989                 e->e_dn, (long) e->e_id, scope );
 990 #endif
 991
 992         xf.f_or = filter;
 993         xf.f_choice = LDAP_FILTER_OR;
 994         xf.f_next = NULL;
 995
 996         /* If the user's filter uses objectClass=*,
 997          * these clauses are redundant.
 998          */
 999         if (!oc_filter(filter, 1, &depth) && !get_subentries_visibility(op) ) {
1000                 if( !get_manageDSAit(op) ) { /* match referrals */
1001                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1002                         rf.f_choice = LDAP_FILTER_EQUALITY;
1003                         rf.f_ava = &aa_ref;
1004                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1005                         rf.f_av_value = bv_ref;
1006                         rf.f_next = xf.f_or;
1007                         xf.f_or = &rf;
1008                 }
1009
1010 #ifdef BDB_ALIASES
1011                 if( deref & LDAP_DEREF_SEARCHING ) { /* match aliases */
1012                         struct berval bv_alias = { sizeof("alias")-1, "alias" };
1013                         af.f_choice = LDAP_FILTER_EQUALITY;
1014                         af.f_ava = &aa_alias;
1015                         af.f_av_desc = slap_schema.si_ad_objectClass;
1016                         af.f_av_value = bv_alias;
1017                         af.f_next = xf.f_or;
1018                         xf.f_or = &af;
1019                 }
1020 #endif
1021                 /* We added one of these clauses, filter depth increased */
1022                 if( xf.f_or != filter ) depth++;
1023         }
1024
1025         f.f_next = NULL;
1026         f.f_choice = LDAP_FILTER_AND;
1027         f.f_and = &scopef;
1028         scopef.f_choice = scope == LDAP_SCOPE_SUBTREE
1029                 ? SLAPD_FILTER_DN_SUBTREE
1030                 : SLAPD_FILTER_DN_ONE;
1031         scopef.f_dn = &e->e_nname;
1032         scopef.f_next = xf.f_or == filter ? filter : &xf ;
1033         /* Filter depth increased again, adding scope clause */
1034         depth++;
1035
1036 #ifdef BDB_SUBENTRIES
1037         if( get_subentries_visibility( op ) ) {
1038                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1039                 sf.f_choice = LDAP_FILTER_EQUALITY;
1040                 sf.f_ava = &aa_subentry;
1041                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1042                 sf.f_av_value = bv_subentry;
1043                 sf.f_next = scopef.f_next;
1044                 scopef.f_next = &sf;
1045         }
1046 #endif
1047
1048         /* Allocate IDL stack, plus 1 more for former tmp */
1049         stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1050
1051         rc = bdb_filter_candidates( be, &f, ids, stack, stack+BDB_IDL_UM_SIZE );
1052
1053         ch_free( stack );
1054
1055         if( rc ) {
1056 #ifdef NEW_LOGGING
1057                 LDAP_LOG ( OPERATION, DETAIL1,
1058                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1059 #else
1060                 Debug(LDAP_DEBUG_TRACE,
1061                         "bdb_search_candidates: failed (rc=%d)\n",
1062                         rc, NULL, NULL );
1063 #endif
1064
1065         } else {
1066 #ifdef NEW_LOGGING
1067                 LDAP_LOG ( OPERATION, DETAIL1,
1068                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1069                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1070                         (long) BDB_IDL_LAST(ids));
1071 #else
1072                 Debug(LDAP_DEBUG_TRACE,
1073                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1074                         (long) ids[0],
1075                         (long) BDB_IDL_FIRST(ids),
1076                         (long) BDB_IDL_LAST(ids) );
1077 #endif
1078         }
1079
1080         return rc;
1081 }
1082
1083 #ifdef LDAP_CONTROL_PAGEDRESULTS
1084 static void
1085 send_pagerequest_response(
1086         Connection      *conn,
1087         Operation       *op,
1088         ID              lastid,
1089         int             nentries )
1090 {
1091         LDAPControl     ctrl, *ctrls[2];
1092         BerElement      *ber;
1093         struct berval   *bvalp, cookie = { 0, NULL };
1094         PagedResultsCookie respcookie;
1095
1096 #ifdef NEW_LOGGING
1097         LDAP_LOG ( OPERATION, ENTRY,
1098                 "send_pagerequest_response: lastid: (0x%08lx) "
1099                 "nentries: (0x%081x)\n",
1100                 lastid, nentries );
1101 #else
1102         Debug(LDAP_DEBUG_ARGS, "send_pagerequest_response: lastid: (0x%08lx) "
1103                         "nentries: (0x%081x)\n", lastid, nentries, NULL );
1104 #endif
1105
1106         ctrl.ldctl_value.bv_val = NULL;
1107         ctrls[0] = &ctrl;
1108         ctrls[1] = NULL;
1109
1110         if (( ber = ber_alloc_t(LBER_USE_DER)) == NULL ) {
1111                 goto done;
1112         }
1113
1114         respcookie = ( PagedResultsCookie )lastid;
1115         conn->c_pagedresults_state.ps_cookie = respcookie;
1116         cookie.bv_len = sizeof( respcookie );
1117 #if 0
1118         cookie.bv_val = ber_memalloc( sizeof( respcookie ) );
1119         AC_MEMCPY( cookie.bv_val, &respcookie, sizeof( respcookie ) );
1120 #else
1121         cookie.bv_val = (char *)&respcookie;
1122 #endif
1123 /*
1124         conn->c_pagedresults_state.ps_cookie = cookie.bv_val;
1125 */
1126
1127         ber_printf( ber, "{iO}", 0, &cookie );
1128 #if 0
1129         ber_memfree( cookie.bv_val );
1130 #endif
1131
1132         if ( ber_flatten( ber, &bvalp ) == LBER_ERROR ) {
1133                 goto done;
1134         }
1135
1136         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1137         ctrls[0]->ldctl_value = ( *bvalp );
1138         ctrls[0]->ldctl_iscritical = 0;
1139
1140         send_search_result( conn, op,
1141                 LDAP_SUCCESS,
1142                 NULL, NULL, NULL, ctrls, nentries );
1143
1144 done:
1145         if ( ctrls[0]->ldctl_value.bv_val ) {
1146                 ch_free( ctrls[0]->ldctl_value.bv_val );
1147         }
1148 }
1149 #endif /* LDAP_CONTROL_PAGEDRESULTS */
1150