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

   1 /* search.c - search operation */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2003 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21
  22 #include "back-bdb.h"
  23 #include "idl.h"
  24 #include "external.h"
  25
  26 static int base_candidate(
  27         BackendDB       *be,
  28         Entry   *e,
  29         ID              *ids );
  30
  31 static int search_candidates(
  32         Operation *stackop,     /* op with the current threadctx/slab cache */
  33         Operation *sop,         /* search op */
  34         SlapReply *rs,
  35         Entry *e,
  36         u_int32_t locker,
  37         ID      *ids,
  38         ID      *scopes );
  39
  40 static void send_pagerequest_response(
  41         Operation *op,
  42         SlapReply *rs,
  43         ID  lastid,
  44         int tentries );
  45
  46 /* Dereference aliases for a single alias entry. Return the final
  47  * dereferenced entry on success, NULL on any failure.
  48  */
  49 static Entry * deref_base (
  50         Operation *op,
  51         SlapReply *rs,
  52         Entry *e,
  53         Entry **matched,
  54         u_int32_t locker,
  55         DB_LOCK *lock,
  56         ID      *tmp,
  57         ID      *visited )
  58 {
  59         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  60         struct berval ndn;
  61         EntryInfo *ei;
  62         DB_LOCK lockr;
  63
  64         rs->sr_err = LDAP_ALIAS_DEREF_PROBLEM;
  65         rs->sr_text = "maximum deref depth exceeded";
  66
  67         while (BDB_IDL_N(tmp) < op->o_bd->be_max_deref_depth) {
  68
  69                 /* Remember the last entry we looked at, so we can
  70                  * report broken links
  71                  */
  72                 *matched = e;
  73
  74                 /* If this is part of a subtree or onelevel search,
  75                  * have we seen this ID before? If so, quit.
  76                  */
  77                 if ( visited && bdb_idl_insert( visited, e->e_id ) ) {
  78                         e = NULL;
  79                         break;
  80                 }
  81
  82                 /* If we've seen this ID during this deref iteration,
  83                  * we've hit a loop.
  84                  */
  85                 if ( bdb_idl_insert( tmp, e->e_id ) ) {
  86                         rs->sr_err = LDAP_ALIAS_PROBLEM;
  87                         rs->sr_text = "circular alias";
  88                         e = NULL;
  89                         break;
  90                 }
  91
  92                 /* If there was a problem getting the aliasedObjectName,
  93                  * get_alias_dn will have set the error status.
  94                  */
  95                 if ( get_alias_dn(e, &ndn, &rs->sr_err, &rs->sr_text) ) {
  96                         e = NULL;
  97                         break;
  98                 }
  99
 100                 rs->sr_err = bdb_dn2entry( op, NULL, &ndn, &ei,
 101                         0, locker, &lockr );
 102
 103                 if ( ei ) e = ei->bei_e;
 104                 else    e = NULL;
 105
 106                 if (!e) {
 107                         rs->sr_err = LDAP_ALIAS_PROBLEM;
 108                         rs->sr_text = "aliasedObject not found";
 109                         break;
 110                 }
 111
 112                 /* Free the previous entry, continue to work with the
 113                  * one we just retrieved.
 114                  */
 115                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 116                         *matched, lock);
 117                 *lock = lockr;
 118
 119                 /* We found a regular entry. Return this to the caller. The
 120                  * entry is still locked for Read.
 121                  */
 122                 if (!is_entry_alias(e)) {
 123                         rs->sr_err = LDAP_SUCCESS;
 124                         rs->sr_text = NULL;
 125                         break;
 126                 }
 127         }
 128         return e;
 129 }
 130
 131 /* Look for and dereference all aliases within the search scope. Adds
 132  * the dereferenced entries to the "ids" list. Requires "stack" to be
 133  * able to hold 8 levels of DB_SIZE IDLs. Of course we're hardcoded to
 134  * require a minimum of 8 UM_SIZE IDLs so this is never a problem.
 135  */
 136 static int search_aliases(
 137         Operation *op,
 138         SlapReply *rs,
 139         Entry *e,
 140         u_int32_t locker,
 141         ID *ids,
 142         ID *scopes,
 143         ID *stack
 144 )
 145 {
 146         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 147         ID *aliases, *curscop, *subscop, *visited, *newsubs, *oldsubs, *tmp;
 148         ID cursora, ida, cursoro, ido, *subscop2;
 149         Entry *matched, *a;
 150         EntryInfo *ei;
 151         struct berval bv_alias = { sizeof("alias")-1, "alias" };
 152         AttributeAssertion aa_alias;
 153         Filter  af;
 154         DB_LOCK locka, lockr;
 155         int first = 1;
 156
 157         aliases = stack;        /* IDL of all aliases in the database */
 158         curscop = aliases + BDB_IDL_DB_SIZE;    /* Aliases in the current scope */
 159         subscop = curscop + BDB_IDL_DB_SIZE;    /* The current scope */
 160         visited = subscop + BDB_IDL_DB_SIZE;    /* IDs we've seen in this search */
 161         newsubs = visited + BDB_IDL_DB_SIZE;    /* New subtrees we've added */
 162         oldsubs = newsubs + BDB_IDL_DB_SIZE;    /* Subtrees added previously */
 163         tmp = oldsubs + BDB_IDL_DB_SIZE;        /* Scratch space for deref_base() */
 164
 165         /* A copy of subscop, because subscop gets clobbered by
 166          * the bdb_idl_union/intersection routines
 167          */
 168         subscop2 = tmp + BDB_IDL_DB_SIZE;
 169
 170         af.f_choice = LDAP_FILTER_EQUALITY;
 171         af.f_ava = &aa_alias;
 172         af.f_av_desc = slap_schema.si_ad_objectClass;
 173         af.f_av_value = bv_alias;
 174         af.f_next = NULL;
 175
 176         /* Find all aliases in database */
 177         BDB_IDL_ZERO( aliases );
 178         rs->sr_err = bdb_filter_candidates( op, &af, aliases,
 179                 curscop, visited );
 180         if (rs->sr_err != LDAP_SUCCESS) {
 181                 return rs->sr_err;
 182         }
 183         oldsubs[0] = 1;
 184         oldsubs[1] = e->e_id;
 185
 186         BDB_IDL_ZERO( ids );
 187         BDB_IDL_ZERO( visited );
 188         BDB_IDL_ZERO( newsubs );
 189
 190         cursoro = 0;
 191         ido = bdb_idl_first( oldsubs, &cursoro );
 192
 193         for (;;) {
 194                 /* Set curscop to only the aliases in the current scope. Start with
 195                  * all the aliases, obtain the IDL for the current scope, and then
 196                  * get the intersection of these two IDLs. Add the current scope
 197                  * to the cumulative list of candidates.
 198                  */
 199                 BDB_IDL_CPY( curscop, aliases );
 200                 rs->sr_err = bdb_dn2idl( op, e, subscop,
 201                                         subscop2+BDB_IDL_DB_SIZE );
 202                 if (first) {
 203                         first = 0;
 204                 } else {
 205                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, e, &locka);
 206                 }
 207                 BDB_IDL_CPY(subscop2, subscop);
 208                 rs->sr_err = bdb_idl_intersection(curscop, subscop);
 209                 bdb_idl_union( ids, subscop2 );
 210
 211                 /* Dereference all of the aliases in the current scope. */
 212                 cursora = 0;
 213                 for (ida = bdb_idl_first(curscop, &cursora); ida != NOID;
 214                         ida = bdb_idl_next(curscop, &cursora))
 215                 {
 216                         ei = NULL;
 217                         rs->sr_err = bdb_cache_find_id(op, NULL,
 218                                 ida, &ei, 0, locker, &lockr );
 219                         if (rs->sr_err != LDAP_SUCCESS) {
 220                                 continue;
 221                         }
 222                         a = ei->bei_e;
 223
 224                         /* This should only happen if the curscop IDL has maxed out and
 225                          * turned into a range that spans IDs indiscriminately
 226                          */
 227                         if (!is_entry_alias(a)) {
 228                                 bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 229                                         a, &lockr);
 230                                 continue;
 231                         }
 232
 233                         /* Actually dereference the alias */
 234                         BDB_IDL_ZERO(tmp);
 235                         a = deref_base( op, rs, a, &matched, locker, &lockr,
 236                                 tmp, visited );
 237                         if (a) {
 238                                 /* If the target was not already in our current candidates,
 239                                  * make note of it in the newsubs list. Also
 240                                  * set it in the scopes list so that bdb_search
 241                                  * can check it.
 242                                  */
 243                                 if (bdb_idl_insert(ids, a->e_id) == 0) {
 244                                         bdb_idl_insert(newsubs, a->e_id);
 245                                         bdb_idl_insert(scopes, a->e_id);
 246                                 }
 247                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 248                                         a, &lockr);
 249
 250                         } else if (matched) {
 251                                 /* Alias could not be dereferenced, or it deref'd to
 252                                  * an ID we've already seen. Ignore it.
 253                                  */
 254                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 255                                         matched, &lockr );
 256                                 rs->sr_text = NULL;
 257                         }
 258                 }
 259                 /* If this is a OneLevel search, we're done; oldsubs only had one
 260                  * ID in it. For a Subtree search, oldsubs may be a list of scope IDs.
 261                  */
 262                 if (op->ors_scope != LDAP_SCOPE_SUBTREE) break;
 263 nextido:
 264                 ido = bdb_idl_next( oldsubs, &cursoro );
 265
 266                 /* If we're done processing the old scopes, did we add any new
 267                  * scopes in this iteration? If so, go back and do those now.
 268                  */
 269                 if (ido == NOID) {
 270                         if (BDB_IDL_IS_ZERO(newsubs)) break;
 271                         BDB_IDL_CPY(oldsubs, newsubs);
 272                         BDB_IDL_ZERO(newsubs);
 273                         cursoro = 0;
 274                         ido = bdb_idl_first( oldsubs, &cursoro );
 275                 }
 276
 277                 /* Find the entry corresponding to the next scope. If it can't
 278                  * be found, ignore it and move on. This should never happen;
 279                  * we should never see the ID of an entry that doesn't exist.
 280                  * Set the name so that the scope's IDL can be retrieved.
 281                  */
 282                 ei = NULL;
 283                 rs->sr_err = bdb_cache_find_id(op, NULL, ido, &ei,
 284                         0, locker, &locka );
 285                 if (rs->sr_err != LDAP_SUCCESS) goto nextido;
 286                 e = ei->bei_e;
 287         }
 288         return rs->sr_err;
 289 }
 290
 291 static
 292 int is_sync_protocol( Operation *op )
 293 {
 294         if ( op->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST )
 295                 return 1;
 296         return 0;
 297 }
 298
 299 #define IS_BDB_REPLACE(type) (( type == LDAP_PSEARCH_BY_DELETE ) || \
 300         ( type == LDAP_PSEARCH_BY_SCOPEOUT ))
 301 #define IS_PSEARCH (op != sop)
 302
 303 static Operation *
 304 bdb_drop_psearch( Operation *op, ber_int_t msgid )
 305 {
 306         Operation       *ps_list;
 307         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 308
 309         LDAP_LIST_FOREACH ( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 310                 if ( ps_list->o_connid == op->o_connid ) {
 311                         if ( ps_list->o_msgid == msgid ) {
 312                                 ps_list->o_abandon = 1;
 313                                 LDAP_LIST_REMOVE( ps_list, o_ps_link );
 314                                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 315                                 LDAP_STAILQ_REMOVE( &op->o_conn->c_ops, ps_list,
 316                                         slap_op, o_next );
 317                                 LDAP_STAILQ_NEXT( ps_list, o_next ) = NULL;
 318                                 op->o_conn->c_n_ops_executing--;
 319                                 op->o_conn->c_n_ops_completed++;
 320                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 321                                 return ps_list;
 322                         }
 323                 }
 324         }
 325
 326         return NULL;
 327 }
 328
 329 int
 330 bdb_abandon( Operation *op, SlapReply *rs )
 331 {
 332         Operation       *ps;
 333
 334         ps = bdb_drop_psearch( op, op->oq_abandon.rs_msgid );
 335         if ( ps ) {
 336                 if ( ps->o_tmpmemctx ) {
 337                         sl_mem_destroy( NULL, ps->o_tmpmemctx );
 338                 }
 339                 slap_op_free ( ps );
 340                 return LDAP_SUCCESS;
 341         }
 342         return LDAP_UNAVAILABLE;
 343 }
 344
 345 int
 346 bdb_cancel( Operation *op, SlapReply *rs )
 347 {
 348         Operation       *ps;
 349
 350         ps = bdb_drop_psearch( op, op->oq_cancel.rs_msgid );
 351         if ( ps ) {
 352                 rs->sr_err = LDAP_CANCELLED;
 353                 send_ldap_result( ps, rs );
 354                 if ( ps->o_tmpmemctx ) {
 355                         sl_mem_destroy( NULL, ps->o_tmpmemctx );
 356                 }
 357                 slap_op_free ( ps );
 358                 return LDAP_SUCCESS;
 359         }
 360         return LDAP_UNAVAILABLE;
 361 }
 362
 363 int bdb_search( Operation *op, SlapReply *rs )
 364 {
 365         return bdb_do_search( op, rs, op, NULL, 0 );
 366 }
 367
 368 /* For persistent searches, op is the currently executing operation,
 369  * sop is the persistent search. For regular searches, sop = op.
 370  */
 371 int
 372 bdb_do_search( Operation *op, SlapReply *rs, Operation *sop,
 373         Entry *ps_e, int ps_type )
 374 {
 375         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 376         time_t          stoptime;
 377         ID              id, cursor;
 378         ID              candidates[BDB_IDL_UM_SIZE];
 379         ID              scopes[BDB_IDL_DB_SIZE];
 380         Entry           *e = NULL, base;
 381         Entry   *matched = NULL;
 382         EntryInfo       *ei;
 383         struct berval   realbase = { 0, NULL };
 384         int             manageDSAit;
 385         int             tentries = 0;
 386         ID              lastid = NOID;
 387         AttributeName   *attrs;
 388
 389         Filter contextcsnand, contextcsnle, cookief, csnfnot,
 390                 csnfeq, csnfand, csnfge;
 391         AttributeAssertion aa_ge, aa_eq, aa_le;
 392         int             entry_count = 0;
 393         struct berval *search_context_csn = NULL;
 394         DB_LOCK         ctxcsn_lock;
 395         LDAPControl     *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
 396         int             num_ctrls = 0;
 397         AttributeName   uuid_attr[2];
 398         int             rc_sync = 0;
 399         int             entry_sync_state = -1;
 400         AttributeName   null_attr;
 401         int             no_sync_state_change = 0;
 402         struct slap_limits_set *limit = NULL;
 403         int isroot = 0;
 404
 405         u_int32_t       locker = 0;
 406         DB_LOCK         lock;
 407
 408         Operation       *ps_list;
 409         int                     sync_send_present_mode = 1;
 410         int                     match;
 411         MatchingRule *mr;
 412         const char *text;
 413         int                     slog_found = 0;
 414
 415         BerVarray       syncUUID_set = NULL;
 416         int                     syncUUID_set_cnt = 0;
 417
 418 #ifdef NEW_LOGGING
 419         LDAP_LOG( OPERATION, ENTRY, "bdb_search\n", 0, 0, 0 );
 420 #else
 421         Debug( LDAP_DEBUG_TRACE, "=> bdb_search\n",
 422                 0, 0, 0);
 423 #endif
 424         attrs = sop->oq_search.rs_attrs;
 425
 426         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST ) {
 427                 struct slap_session_entry *sent;
 428                 if ( sop->o_sync_state.sid >= 0 ) {
 429                         LDAP_LIST_FOREACH( sent, &bdb->bi_session_list, se_link ) {
 430                                 if ( sent->se_id == sop->o_sync_state.sid ) {
 431                                         sop->o_sync_slog_size = sent->se_size;
 432                                         break;
 433                                 }
 434                         }
 435                 }
 436         }
 437
 438         /* psearch needs to be registered before refresh begins */
 439         /* psearch and refresh transmission is serialized in send_ldap_ber() */
 440         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
 441                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 442                 LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 443                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 444
 445         } else if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST
 446                 && sop->o_sync_slog_size >= 0 )
 447         {
 448                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 449                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 450                         if ( ps_list->o_sync_slog_size >= 0 ) {
 451                                 if ( ps_list->o_sync_state.sid == sop->o_sync_state.sid ) {
 452                                         slog_found = 1;
 453                                         break;
 454                                 }
 455                         }
 456                 }
 457
 458                 if ( slog_found ) {
 459                         if ( ps_list->o_sync_slog_omitcsn.bv_len != 0 ) {
 460                                 mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 461                                 if ( sop->o_sync_state.ctxcsn &&
 462                                          sop->o_sync_state.ctxcsn->bv_val != NULL ) {
 463                                          value_match( &match, slap_schema.si_ad_entryCSN, mr,
 464                                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 465                                                                 sop->o_sync_state.ctxcsn,
 466                                                                 &ps_list->o_sync_slog_omitcsn,
 467                                                                 &text );
 468                                 } else {
 469                                         match = -1;
 470                                 }
 471                                 if ( match >= 0 ) {
 472                                         sync_send_present_mode = 0;
 473                                 }
 474                         } else {
 475                                 sync_send_present_mode = 0;
 476                         }
 477                 } else if ( sop->o_sync_slog_size >= 0 ) {
 478                         LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 479                 } else {
 480                         sop->o_sync_state.sid = -1;
 481                 }
 482                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 483         }
 484
 485         null_attr.an_desc = NULL;
 486         null_attr.an_oc = NULL;
 487         null_attr.an_oc_exclude = 0;
 488         null_attr.an_name.bv_len = 0;
 489         null_attr.an_name.bv_val = NULL;
 490
 491         for( num_ctrls = 0; num_ctrls < SLAP_MAX_RESPONSE_CONTROLS; num_ctrls++ ) {
 492                 ctrls[num_ctrls] = NULL;
 493         }
 494         num_ctrls = 0;
 495
 496         if ( IS_PSEARCH && IS_BDB_REPLACE(ps_type)) {
 497                 attrs = uuid_attr;
 498                 attrs[0].an_desc = NULL;
 499                 attrs[0].an_oc = NULL;
 500                 attrs[0].an_oc_exclude = 0;
 501                 attrs[0].an_name.bv_len = 0;
 502                 attrs[0].an_name.bv_val = NULL;
 503         }
 504
 505         manageDSAit = get_manageDSAit( sop );
 506
 507         /* Sync control overrides manageDSAit */
 508
 509         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
 510                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 511                         manageDSAit = SLAP_CRITICAL_CONTROL;
 512                 }
 513         } else if ( IS_PSEARCH ) {
 514                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 515                         manageDSAit = SLAP_CRITICAL_CONTROL;
 516                 }
 517         }
 518
 519         rs->sr_err = LOCK_ID (bdb->bi_dbenv, &locker );
 520
 521         switch(rs->sr_err) {
 522         case 0:
 523                 break;
 524         default:
 525                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 526                 return rs->sr_err;
 527         }
 528
 529         if ( sop->o_req_ndn.bv_len == 0 ) {
 530                 /* DIT root special case */
 531                 e = (Entry *) &slap_entry_root;
 532                 rs->sr_err = LDAP_SUCCESS;
 533         } else {
 534 dn2entry_retry:
 535                 /* get entry with reader lock */
 536                 rs->sr_err = bdb_dn2entry( op, NULL, &sop->o_req_ndn, &ei,
 537                         1, locker, &lock );
 538         }
 539
 540         switch(rs->sr_err) {
 541         case DB_NOTFOUND:
 542                 matched = ei->bei_e;
 543                 break;
 544         case 0:
 545                 e = ei->bei_e;
 546                 break;
 547         case LDAP_BUSY:
 548                 send_ldap_error( sop, rs, LDAP_BUSY, "ldap server busy" );
 549                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 550                 return LDAP_BUSY;
 551         case DB_LOCK_DEADLOCK:
 552         case DB_LOCK_NOTGRANTED:
 553                 goto dn2entry_retry;
 554         default:
 555                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 556                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 557                 return rs->sr_err;
 558         }
 559
 560         if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
 561                 BDB_IDL_ZERO(candidates);
 562                 e = deref_base( op, rs, e, &matched, locker, &lock,
 563                         candidates, NULL );
 564         }
 565
 566         if ( e == NULL ) {
 567                 struct berval matched_dn = { 0, NULL };
 568
 569                 if ( matched != NULL ) {
 570                         BerVarray erefs;
 571                         ber_dupbv( &matched_dn, &matched->e_name );
 572
 573                         erefs = is_entry_referral( matched )
 574                                 ? get_entry_referrals( op, matched )
 575                                 : NULL;
 576
 577                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 578                                 matched, &lock);
 579                         matched = NULL;
 580
 581                         if( erefs ) {
 582                                 rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 583                                         &sop->o_req_dn, sop->oq_search.rs_scope );
 584                                 ber_bvarray_free( erefs );
 585                         }
 586
 587                 } else {
 588                         rs->sr_ref = referral_rewrite( default_referral,
 589                                 NULL, &sop->o_req_dn, sop->oq_search.rs_scope );
 590                 }
 591
 592                 rs->sr_err = LDAP_REFERRAL;
 593                 rs->sr_matched = matched_dn.bv_val;
 594                 send_ldap_result( sop, rs );
 595
 596                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 597                 if ( rs->sr_ref ) {
 598                         ber_bvarray_free( rs->sr_ref );
 599                         rs->sr_ref = NULL;
 600                 }
 601                 if ( matched_dn.bv_val ) {
 602                         ber_memfree( matched_dn.bv_val );
 603                         rs->sr_matched = NULL;
 604                 }
 605                 return rs->sr_err;
 606         }
 607
 608         if (!manageDSAit && e != &slap_entry_root && is_entry_referral( e ) ) {
 609                 /* entry is a referral, don't allow add */
 610                 struct berval matched_dn;
 611                 BerVarray erefs;
 612
 613                 ber_dupbv( &matched_dn, &e->e_name );
 614                 erefs = get_entry_referrals( op, e );
 615
 616                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 617                 e = NULL;
 618
 619                 if( erefs ) {
 620                         rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 621                                 &sop->o_req_dn, sop->oq_search.rs_scope );
 622                         ber_bvarray_free( erefs );
 623                 }
 624
 625 #ifdef NEW_LOGGING
 626                 LDAP_LOG ( OPERATION, RESULTS,
 627                         "bdb_search: entry is referral\n", 0, 0, 0 );
 628 #else
 629                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 630                         0, 0, 0 );
 631 #endif
 632
 633                 if (!rs->sr_ref) rs->sr_text = "bad_referral object";
 634                 rs->sr_err = LDAP_REFERRAL;
 635                 rs->sr_matched = matched_dn.bv_val;
 636                 send_ldap_result( sop, rs );
 637
 638                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 639                 ber_bvarray_free( rs->sr_ref );
 640                 rs->sr_ref = NULL;
 641                 ber_memfree( matched_dn.bv_val );
 642                 rs->sr_matched = NULL;
 643                 return 1;
 644         }
 645
 646         if ( get_assert( op ) &&
 647                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 648         {
 649                 rs->sr_err = LDAP_ASSERTION_FAILED;
 650                 send_ldap_result( sop, rs );
 651                 return 1;
 652         }
 653
 654         /* if not root, get appropriate limits */
 655         if ( be_isroot( op->o_bd, &sop->o_ndn ) ) {
 656                 isroot = 1;
 657         } else {
 658                 ( void ) get_limits( op->o_bd, &sop->o_ndn, &limit );
 659         }
 660
 661         /* The time/size limits come first because they require very little
 662          * effort, so there's no chance the candidates are selected and then
 663          * the request is not honored only because of time/size constraints */
 664
 665         /* if no time limit requested, use soft limit (unless root!) */
 666         if ( isroot ) {
 667                 if ( sop->oq_search.rs_tlimit == 0 ) {
 668                         sop->oq_search.rs_tlimit = -1;  /* allow root to set no limit */
 669                 }
 670
 671                 if ( sop->oq_search.rs_slimit == 0 ) {
 672                         sop->oq_search.rs_slimit = -1;
 673                 }
 674
 675         } else {
 676                 /* if no limit is required, use soft limit */
 677                 if ( sop->oq_search.rs_tlimit <= 0 ) {
 678                         sop->oq_search.rs_tlimit = limit->lms_t_soft;
 679
 680                 /* if requested limit higher than hard limit, abort */
 681                 } else if ( sop->oq_search.rs_tlimit > limit->lms_t_hard ) {
 682                         /* no hard limit means use soft instead */
 683                         if ( limit->lms_t_hard == 0
 684                                         && limit->lms_t_soft > -1
 685                                         && sop->oq_search.rs_tlimit > limit->lms_t_soft ) {
 686                                 sop->oq_search.rs_tlimit = limit->lms_t_soft;
 687
 688                         /* positive hard limit means abort */
 689                         } else if ( limit->lms_t_hard > 0 ) {
 690                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 691                                 send_ldap_result( sop, rs );
 692                                 rs->sr_err = LDAP_SUCCESS;
 693                                 goto done;
 694                         }
 695
 696                         /* negative hard limit means no limit */
 697                 }
 698
 699                 /* if no limit is required, use soft limit */
 700                 if ( sop->oq_search.rs_slimit <= 0 ) {
 701                         if ( get_pagedresults(sop) && limit->lms_s_pr != 0 ) {
 702                                 sop->oq_search.rs_slimit = limit->lms_s_pr;
 703                         } else {
 704                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 705                         }
 706
 707                 /* if requested limit higher than hard limit, abort */
 708                 } else if ( sop->oq_search.rs_slimit > limit->lms_s_hard ) {
 709                         /* no hard limit means use soft instead */
 710                         if ( limit->lms_s_hard == 0
 711                                         && limit->lms_s_soft > -1
 712                                         && sop->oq_search.rs_slimit > limit->lms_s_soft ) {
 713                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 714
 715                         /* positive hard limit means abort */
 716                         } else if ( limit->lms_s_hard > 0 ) {
 717                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 718                                 send_ldap_result( sop, rs );
 719                                 rs->sr_err = LDAP_SUCCESS;
 720                                 goto done;
 721                         }
 722
 723                         /* negative hard limit means no limit */
 724                 }
 725         }
 726
 727         /* compute it anyway; root does not use it */
 728         stoptime = op->o_time + sop->oq_search.rs_tlimit;
 729
 730         /* need normalized dn below */
 731         ber_dupbv( &realbase, &e->e_nname );
 732
 733         /* Copy info to base, must free entry before accessing the database
 734          * in search_candidates, to avoid deadlocks.
 735          */
 736         base.e_private = e->e_private;
 737         base.e_nname = realbase;
 738         base.e_id = e->e_id;
 739
 740         if ( e != &slap_entry_root ) {
 741                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 742         }
 743         e = NULL;
 744
 745         if ( !IS_PSEARCH ) {
 746                 rs->sr_err = bdb_get_commit_csn( sop, rs, &search_context_csn,
 747                         locker, &ctxcsn_lock );
 748
 749                 if ( rs->sr_err != LDAP_SUCCESS ) {
 750                         send_ldap_error( sop, rs, rs->sr_err,
 751                                 "error in csn management in search" );
 752                         goto done;
 753                 }
 754
 755                 if ( sop->o_sync_mode != SLAP_SYNC_NONE &&
 756                         sop->o_sync_state.ctxcsn &&
 757                         sop->o_sync_state.ctxcsn->bv_val &&
 758                         ber_bvcmp( &sop->o_sync_state.ctxcsn[0], search_context_csn ) == 0 )
 759                 {
 760                         bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 761                         goto nochange;
 762                 }
 763         } else {
 764                 search_context_csn = ber_dupbv( NULL, &op->o_sync_csn );
 765         }
 766
 767         /* select candidates */
 768         if ( sop->oq_search.rs_scope == LDAP_SCOPE_BASE ) {
 769                 rs->sr_err = base_candidate( op->o_bd, &base, candidates );
 770
 771         } else {
 772                 BDB_IDL_ZERO( candidates );
 773                 BDB_IDL_ZERO( scopes );
 774                 rs->sr_err = search_candidates( op, sop, rs, &base,
 775                         locker, candidates, scopes );
 776         }
 777
 778         if ( !IS_PSEARCH ) {
 779                 if ( sop->o_sync_mode != SLAP_SYNC_NONE ) {
 780                         bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 781                 }
 782         }
 783
 784         /* start cursor at beginning of candidates.
 785          */
 786         cursor = 0;
 787         if (IS_PSEARCH) {
 788                 if ( !BDB_IDL_IS_RANGE( candidates ) ) {
 789                         cursor = bdb_idl_search( candidates, ps_e->e_id );
 790                         if ( candidates[cursor] != ps_e->e_id ) {
 791                                 rs->sr_err = LDAP_SUCCESS;
 792                                 goto done;
 793                         }
 794                 } else {
 795                         if ( ps_e->e_id < BDB_IDL_RANGE_FIRST(candidates)
 796                            || ps_e->e_id > BDB_IDL_RANGE_LAST(candidates)){
 797                                 rs->sr_err = LDAP_SUCCESS;
 798                                 goto done;
 799                         }
 800                 }
 801                 candidates[0] = 1;
 802                 candidates[1] = ps_e->e_id;
 803         }
 804
 805         if ( candidates[0] == 0 ) {
 806 #ifdef NEW_LOGGING
 807                 LDAP_LOG ( OPERATION, RESULTS,
 808                         "bdb_search: no candidates\n", 0, 0, 0 );
 809 #else
 810                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 811                         0, 0, 0 );
 812 #endif
 813
 814                 rs->sr_err = LDAP_SUCCESS;
 815                 rs->sr_entry = NULL;
 816                 send_ldap_result( sop, rs );
 817                 goto done;
 818         }
 819
 820         /* if not root and candidates exceed to-be-checked entries, abort */
 821         if ( !isroot && limit->lms_s_unchecked != -1 ) {
 822                 if ( BDB_IDL_N(candidates) > (unsigned) limit->lms_s_unchecked ) {
 823                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 824                         send_ldap_result( sop, rs );
 825                         rs->sr_err = LDAP_SUCCESS;
 826                         goto done;
 827                 }
 828         }
 829
 830         if ( isroot || !limit->lms_s_pr_hide ) {
 831                 tentries = BDB_IDL_N(candidates);
 832         }
 833
 834         if ( get_pagedresults(sop) ) {
 835                 if ( sop->o_pagedresults_state.ps_cookie == 0 ) {
 836                         id = 0;
 837                 } else {
 838                         if ( sop->o_pagedresults_size == 0 ) {
 839                                 rs->sr_err = LDAP_SUCCESS;
 840                                 rs->sr_text = "search abandoned by pagedResult size=0";
 841                                 send_ldap_result( sop, rs );
 842                                 goto done;
 843                         }
 844                         for ( id = bdb_idl_first( candidates, &cursor );
 845                                 id != NOID && id <= (ID)( sop->o_pagedresults_state.ps_cookie );
 846                                 id = bdb_idl_next( candidates, &cursor ) );
 847                 }
 848                 if ( cursor == NOID ) {
 849 #ifdef NEW_LOGGING
 850                         LDAP_LOG ( OPERATION, RESULTS,
 851                                 "bdb_search: no paged results candidates\n",
 852                         0, 0, 0 );
 853 #else
 854                         Debug( LDAP_DEBUG_TRACE,
 855                                 "bdb_search: no paged results candidates\n",
 856                                 0, 0, 0 );
 857 #endif
 858                         send_pagerequest_response( sop, rs, lastid, 0 );
 859
 860                         rs->sr_err = LDAP_OTHER;
 861                         goto done;
 862                 }
 863                 goto loop_begin;
 864         }
 865
 866         if ( (sop->o_sync_mode & SLAP_SYNC_REFRESH) || IS_PSEARCH ) {
 867                 int match;
 868
 869                 cookief.f_choice = LDAP_FILTER_AND;
 870                 cookief.f_and = &csnfnot;
 871                 cookief.f_next = NULL;
 872
 873                 csnfnot.f_choice = LDAP_FILTER_NOT;
 874                 csnfnot.f_not = &csnfeq;
 875                 csnfnot.f_next = &csnfand;
 876
 877                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 878                 csnfeq.f_ava = &aa_eq;
 879                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 880                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 881                         csnfeq.f_av_value = *sop->o_sync_state.ctxcsn;
 882                 } else {
 883                         csnfeq.f_av_value = slap_empty_bv;
 884                 }
 885
 886                 csnfand.f_choice = LDAP_FILTER_AND;
 887                 csnfand.f_and = &csnfge;
 888                 csnfand.f_next = NULL;
 889
 890                 csnfge.f_choice = LDAP_FILTER_GE;
 891                 csnfge.f_ava = &aa_ge;
 892                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 893                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 894                         csnfge.f_av_value = *sop->o_sync_state.ctxcsn;
 895                 } else {
 896                         csnfge.f_av_value = slap_empty_bv;
 897                 }
 898
 899                 if ( search_context_csn && !IS_PSEARCH ) {
 900                         csnfge.f_next = &contextcsnand;
 901
 902                         contextcsnand.f_choice = LDAP_FILTER_AND;
 903                         contextcsnand.f_and = &contextcsnle;
 904                         contextcsnand.f_next = NULL;
 905
 906                         contextcsnle.f_choice = LDAP_FILTER_LE;
 907                         contextcsnle.f_ava = &aa_le;
 908                         contextcsnle.f_av_desc = slap_schema.si_ad_entryCSN;
 909                         contextcsnle.f_av_value = *search_context_csn;
 910                         contextcsnle.f_next = sop->oq_search.rs_filter;
 911
 912                         mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 913                         if ( sop->o_sync_state.ctxcsn &&
 914                                 sop->o_sync_state.ctxcsn->bv_val != NULL )
 915                         {
 916                                 value_match( &match, slap_schema.si_ad_entryCSN, mr,
 917                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 918                                                 &sop->o_sync_state.ctxcsn[0], search_context_csn,
 919                                                 &text );
 920                         } else {
 921                                 match = -1;
 922                         }
 923                         no_sync_state_change = ( match >= 0 );
 924                 } else {
 925                         csnfge.f_next = sop->oq_search.rs_filter;
 926                 }
 927         }
 928
 929         for ( id = bdb_idl_first( candidates, &cursor );
 930                 id != NOID && !no_sync_state_change;
 931                 id = bdb_idl_next( candidates, &cursor ) )
 932         {
 933                 int             scopeok = 0;
 934
 935 loop_begin:
 936                 /* check for abandon */
 937                 if ( sop->o_abandon ) {
 938                         if ( sop != op ) {
 939                                 bdb_drop_psearch( sop, sop->o_msgid );
 940                         }
 941                         rs->sr_err = LDAP_SUCCESS;
 942                         goto done;
 943                 }
 944
 945                 if ( sop->o_cancel ) {
 946                         assert( sop->o_cancel == SLAP_CANCEL_REQ );
 947                         rs->sr_err = LDAP_CANCELLED;
 948                         send_ldap_result( sop, rs );
 949                         sop->o_cancel = SLAP_CANCEL_ACK;
 950                         rs->sr_err = LDAP_SUCCESS;
 951                         goto done;
 952                 }
 953
 954                 /* check time limit */
 955                 if ( sop->oq_search.rs_tlimit != -1 && slap_get_time() > stoptime ) {
 956                         rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 957                         rs->sr_ref = rs->sr_v2ref;
 958                         send_ldap_result( sop, rs );
 959                         rs->sr_err = LDAP_SUCCESS;
 960                         goto done;
 961                 }
 962
 963
 964                 if (!IS_PSEARCH) {
 965 id2entry_retry:
 966                         /* get the entry with reader lock */
 967                         ei = NULL;
 968                         rs->sr_err = bdb_cache_find_id( op, NULL,
 969                                 id, &ei, 0, locker, &lock );
 970
 971                         if (rs->sr_err == LDAP_BUSY) {
 972                                 rs->sr_text = "ldap server busy";
 973                                 send_ldap_result( sop, rs );
 974                                 goto done;
 975
 976                         } else if ( rs->sr_err == DB_LOCK_DEADLOCK
 977                                 || rs->sr_err == DB_LOCK_NOTGRANTED )
 978                         {
 979                                 goto id2entry_retry;
 980                         }
 981
 982                         if ( ei && rs->sr_err == LDAP_SUCCESS ) {
 983                                 e = ei->bei_e;
 984                         } else {
 985                                 e = NULL;
 986                         }
 987
 988                         if ( e == NULL ) {
 989                                 if( !BDB_IDL_IS_RANGE(candidates) ) {
 990                                         /* only complain for non-range IDLs */
 991 #ifdef NEW_LOGGING
 992                                         LDAP_LOG ( OPERATION, RESULTS,
 993                                                 "bdb_search: candidate %ld not found\n",
 994                                                 (long) id, 0, 0);
 995 #else
 996                                         Debug( LDAP_DEBUG_TRACE,
 997                                                 "bdb_search: candidate %ld not found\n",
 998                                                 (long) id, 0, 0 );
 999 #endif
1000                                 }
1001
1002                                 goto loop_continue;
1003                         }
1004                 } else {
1005                         e = ps_e;
1006                 }
1007
1008                 rs->sr_entry = e;
1009 #ifdef BDB_SUBENTRIES
1010                 /* FIXME: send all but syncrepl */
1011 #if 0
1012                 if ( !is_sync_protocol( sop ) )
1013 #endif
1014                 {
1015                         if ( is_entry_subentry( e ) ) {
1016                                 if( sop->oq_search.rs_scope != LDAP_SCOPE_BASE ) {
1017                                         if(!get_subentries_visibility( sop )) {
1018                                                 /* only subentries are visible */
1019                                                 goto loop_continue;
1020                                         }
1021
1022                                 } else if ( get_subentries( sop ) &&
1023                                         !get_subentries_visibility( sop ))
1024                                 {
1025                                         /* only subentries are visible */
1026                                         goto loop_continue;
1027                                 }
1028
1029                         } else if ( get_subentries_visibility( sop )) {
1030                                 /* only subentries are visible */
1031                                 goto loop_continue;
1032                         }
1033                 }
1034 #endif /* BDB_SUBENTRIES */
1035
1036                 /* Does this candidate actually satisfy the search scope?
1037                  *
1038                  * Note that we don't lock access to the bei_parent pointer.
1039                  * Since only leaf nodes can be deleted, the parent of any
1040                  * node will always be a valid node. Also since we have
1041                  * a Read lock on the data, it cannot be renamed out of the
1042                  * scope while we are looking at it, and unless we're using
1043                  * BDB_HIER, its parents cannot be moved either.
1044                  */
1045                 switch( sop->ors_scope ) {
1046                 case LDAP_SCOPE_BASE:
1047                         /* This is always true, yes? */
1048                         if ( id == base.e_id ) scopeok = 1;
1049                         break;
1050
1051                 case LDAP_SCOPE_ONELEVEL:
1052                         if ( ei->bei_parent->bei_id == base.e_id ) scopeok = 1;
1053                         break;
1054
1055                 case LDAP_SCOPE_SUBTREE: {
1056                         EntryInfo *tmp;
1057                         for ( tmp = BEI(e); tmp->bei_parent;
1058                                 tmp = tmp->bei_parent )
1059                         {
1060                                 if ( tmp->bei_id == base.e_id ) {
1061                                         scopeok = 1;
1062                                         break;
1063                                 }
1064                         }
1065                         } break;
1066                 }
1067
1068 #ifdef BDB_ALIASES
1069                 /* aliases were already dereferenced in candidate list */
1070                 if ( sop->ors_deref & LDAP_DEREF_SEARCHING ) {
1071                         /* but if the search base is an alias, and we didn't
1072                          * deref it when finding, return it.
1073                          */
1074                         if ( is_entry_alias(e) &&
1075                                 ((sop->ors_deref & LDAP_DEREF_FINDING) ||
1076                                         !bvmatch(&e->e_nname, &op->o_req_ndn)))
1077                         {
1078                                 goto loop_continue;
1079                         }
1080
1081                         /* scopes is only non-empty for onelevel or subtree */
1082                         if ( !scopeok && BDB_IDL_N(scopes) ) {
1083                                 unsigned x;
1084                                 if ( sop->ors_scope == LDAP_SCOPE_ONELEVEL ) {
1085                                         x = bdb_idl_search( scopes,
1086                                                 e->e_id );
1087                                         if ( scopes[x] == e->e_id )
1088                                                 scopeok = 1;
1089                                 } else {
1090                                 /* subtree, walk up the tree */
1091                                         EntryInfo *tmp = BEI(e);
1092                                         for (;tmp->bei_parent; tmp=tmp->bei_parent) {
1093                                                 x = bdb_idl_search( scopes, tmp->bei_id );
1094                                                 if ( scopes[x] == tmp->bei_id ) {
1095                                                         scopeok = 1;
1096                                                         break;
1097                                                 }
1098                                         }
1099                                 }
1100                         }
1101                 }
1102 #endif
1103
1104                 /* Not in scope, ignore it */
1105                 if ( !scopeok ) {
1106 #ifdef NEW_LOGGING
1107                         LDAP_LOG ( OPERATION, RESULTS,
1108                                 "bdb_search: %ld scope not okay\n",
1109                                 (long) id, 0, 0);
1110 #else
1111                         Debug( LDAP_DEBUG_TRACE,
1112                                 "bdb_search: %ld scope not okay\n",
1113                                 (long) id, 0, 0 );
1114 #endif
1115                         goto loop_continue;
1116                 }
1117
1118                 /*
1119                  * if it's a referral, add it to the list of referrals. only do
1120                  * this for non-base searches, and don't check the filter
1121                  * explicitly here since it's only a candidate anyway.
1122                  */
1123                 if ( !manageDSAit && sop->oq_search.rs_scope != LDAP_SCOPE_BASE
1124                         && is_entry_referral( e ) )
1125                 {
1126                         BerVarray erefs = get_entry_referrals( sop, e );
1127                         rs->sr_ref = referral_rewrite( erefs,
1128                                 &e->e_name, NULL,
1129                                 sop->oq_search.rs_scope == LDAP_SCOPE_SUBTREE
1130                                         ? LDAP_SCOPE_SUBTREE
1131                                         : LDAP_SCOPE_BASE );
1132
1133                         send_search_reference( sop, rs );
1134
1135                         ber_bvarray_free( rs->sr_ref );
1136                         ber_bvarray_free( erefs );
1137                         rs->sr_ref = NULL;
1138
1139                         goto loop_continue;
1140                 }
1141
1142                 if ( !manageDSAit && is_entry_glue( e )) {
1143                         goto loop_continue;
1144                 }
1145
1146                 /* if it matches the filter and scope, send it */
1147                 if (IS_PSEARCH) {
1148                         if (ps_type != LDAP_PSEARCH_BY_SCOPEOUT) {
1149                                 rs->sr_err = test_filter( sop, rs->sr_entry, &cookief );
1150                         } else {
1151                                 rs->sr_err = LDAP_COMPARE_TRUE;
1152                         }
1153                 } else {
1154                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1155                                 rc_sync = test_filter( sop, rs->sr_entry, &cookief );
1156                                 rs->sr_err = test_filter( sop, rs->sr_entry, &contextcsnand );
1157                                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1158                                         if ( rc_sync == LDAP_COMPARE_TRUE ) {
1159                                                 if ( no_sync_state_change ) {
1160 #ifdef NEW_LOGGING
1161                                                         LDAP_LOG ( OPERATION, RESULTS,
1162                                                                 "bdb_search: error in context csn management\n",
1163                                                                 0, 0, 0 );
1164 #else
1165                                                         Debug( LDAP_DEBUG_TRACE,
1166                                                                 "bdb_search: error in context csn management\n",
1167                                                                 0, 0, 0 );
1168 #endif
1169                                                 }
1170                                                 entry_sync_state = LDAP_SYNC_ADD;
1171                                         } else {
1172                                                 if ( no_sync_state_change ) {
1173                                                         goto loop_continue;
1174                                                 }
1175                                                 entry_sync_state = LDAP_SYNC_PRESENT;
1176                                         }
1177                                 }
1178                         } else {
1179                                 rs->sr_err = test_filter( sop,
1180                                         rs->sr_entry, sop->oq_search.rs_filter );
1181                         }
1182                 }
1183
1184                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1185                         /* check size limit */
1186             if ( --sop->oq_search.rs_slimit == -1 &&
1187                                 sop->o_sync_slog_size == -1 )
1188                         {
1189                                 if (!IS_PSEARCH) {
1190                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
1191                                                 &bdb->bi_cache, e, &lock );
1192                                 }
1193                                 e = NULL;
1194                                 rs->sr_entry = NULL;
1195                                 rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1196                                 rs->sr_ref = rs->sr_v2ref;
1197                                 send_ldap_result( sop, rs );
1198                                 rs->sr_err = LDAP_SUCCESS;
1199                                 goto done;
1200                         }
1201
1202                         if ( get_pagedresults(sop) ) {
1203                                 if ( rs->sr_nentries >= sop->o_pagedresults_size ) {
1204                                         send_pagerequest_response( sop, rs,
1205                                                 lastid, tentries );
1206                                         goto done;
1207                                 }
1208                                 lastid = id;
1209                         }
1210
1211                         if (e) {
1212                                 /* safe default */
1213                                 int result = -1;
1214
1215                                 if (IS_PSEARCH) {
1216                                         int premodify_found = 0;
1217                                         int entry_sync_state;
1218
1219                                         if ( ps_type == LDAP_PSEARCH_BY_ADD ||
1220                                                  ps_type == LDAP_PSEARCH_BY_DELETE ||
1221                                                  ps_type == LDAP_PSEARCH_BY_MODIFY ||
1222                                                  ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1223                                         {
1224                                                 if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1225                                                         struct psid_entry* psid_e;
1226                                                         LDAP_LIST_FOREACH( psid_e,
1227                                                                 &op->o_pm_list, ps_link)
1228                                                         {
1229                                                                 if( psid_e->ps_op == sop ) {
1230                                                                         premodify_found = 1;
1231                                                                         LDAP_LIST_REMOVE(psid_e, ps_link);
1232                                                                         break;
1233                                                                 }
1234                                                         }
1235                                                         if (psid_e != NULL) free (psid_e);
1236                                                 }
1237                                                 if ( ps_type == LDAP_PSEARCH_BY_ADD ) {
1238                                                         entry_sync_state = LDAP_SYNC_ADD;
1239                                                 } else if ( ps_type == LDAP_PSEARCH_BY_DELETE ) {
1240                                                         entry_sync_state = LDAP_SYNC_DELETE;
1241                                                 } else if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1242                                                         if ( premodify_found ) {
1243                                                                 entry_sync_state = LDAP_SYNC_MODIFY;
1244                                                         } else {
1245                                                                 entry_sync_state = LDAP_SYNC_ADD;
1246                                                         }
1247                                                 } else if ( ps_type == LDAP_PSEARCH_BY_SCOPEOUT ) {
1248                                                         entry_sync_state = LDAP_SYNC_DELETE;
1249                                                 } else {
1250                                                         rs->sr_err = LDAP_OTHER;
1251                                                         goto done;
1252                                                 }
1253                                                 if ( sop->o_sync_slog_size != -1 ) {
1254                                                         if ( entry_sync_state == LDAP_SYNC_DELETE ) {
1255                                                                 result = slap_add_session_log( op, sop, e );
1256                                                         } else {
1257                                                                 result = 1;
1258                                                         }
1259                                                 } else {
1260                                                         struct berval cookie;
1261                                                         slap_compose_sync_cookie( sop, &cookie,
1262                                                                                 search_context_csn,
1263                                                                                 sop->o_sync_state.sid,
1264                                                                                 sop->o_sync_state.rid );
1265                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1266                                                                 rs, e, entry_sync_state, ctrls,
1267                                                                 num_ctrls++, 1, &cookie );
1268                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1269                                                         rs->sr_attrs = attrs;
1270                                                         rs->sr_ctrls = ctrls;
1271                                                         result = send_search_entry( sop, rs );
1272                                                         if ( cookie.bv_val )
1273                                                                 ch_free( cookie.bv_val );
1274                                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1275                                                                          sop->o_tmpmemctx );
1276                                                         sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1277                                                         ctrls[num_ctrls] = NULL;
1278                                                         rs->sr_ctrls = NULL;
1279                                                 }
1280                                         } else if ( ps_type == LDAP_PSEARCH_BY_PREMODIFY ) {
1281                                                 struct psid_entry* psid_e;
1282                                                 psid_e = (struct psid_entry *) ch_calloc (1,
1283                                                         sizeof(struct psid_entry));
1284                                                 psid_e->ps_op = sop;
1285                                                 LDAP_LIST_INSERT_HEAD( &op->o_pm_list,
1286                                                         psid_e, ps_link );
1287
1288                                         } else {
1289 #ifdef NEW_LOGGING
1290                                                 LDAP_LOG ( OPERATION, RESULTS,
1291                                                         "bdb_search: invalid ps_type (%d) \n",
1292                                                         ps_type, 0, 0);
1293 #else
1294                                                 Debug( LDAP_DEBUG_TRACE,
1295                                                         "bdb_search: invalid ps_type (%d) \n",
1296                                                         ps_type, 0, 0);
1297 #endif
1298                                         }
1299                                 } else {
1300                                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1301
1302                                                 if ( rc_sync == LDAP_COMPARE_TRUE ) { /* ADD */
1303                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1304                                                                 rs, e, entry_sync_state, ctrls,
1305                                                                 num_ctrls++, 0, NULL );
1306                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1307                                                         rs->sr_ctrls = ctrls;
1308                                                         rs->sr_attrs = sop->oq_search.rs_attrs;
1309                                                         result = send_search_entry( sop, rs );
1310                                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1311                                                                          sop->o_tmpmemctx );
1312                                                         sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1313                                                         ctrls[num_ctrls] = NULL;
1314                                                         rs->sr_ctrls = NULL;
1315                                                 } else { /* PRESENT */
1316                                                         if ( sync_send_present_mode ) {
1317                                                                 result = slap_build_syncUUID_set( sop,
1318                                                                                                         &syncUUID_set, e );
1319                                                                 if ( result <= 0 ) {
1320                                                                         result = -1;
1321                                                                 } else {
1322                                                                         syncUUID_set_cnt++;
1323                                                                         if ( syncUUID_set_cnt == SLAP_SYNCUUID_SET_SIZE ) {
1324                                                                                 rs->sr_err = LDAP_SUCCESS;
1325                                                                                 rs->sr_rspoid = LDAP_SYNC_INFO;
1326                                                                                 rs->sr_ctrls = NULL;
1327                                                                                 result = slap_send_syncinfo( sop, rs,
1328                                                                                                 LDAP_TAG_SYNC_ID_SET,
1329                                                                                                 NULL, 0, syncUUID_set, 0 );
1330                                                                                 if ( result != LDAP_SUCCESS )
1331                                                                                         result = -1;
1332                                                                                 ber_bvarray_free_x( syncUUID_set,
1333                                                                                                                 sop->o_tmpmemctx );
1334                                                                                 syncUUID_set = NULL;
1335                                                                                 syncUUID_set_cnt = 0;
1336                                                                         }
1337                                                                 }
1338                                                         } else {
1339                                                                 result = 1;
1340                                                         }
1341                                                 }
1342                                         } else {
1343                                                 rs->sr_attrs = sop->oq_search.rs_attrs;
1344                                                 rs->sr_ctrls = NULL;
1345                                                 result = send_search_entry( sop, rs );
1346                                         }
1347                                 }
1348
1349                                 switch (result) {
1350                                 case 0:         /* entry sent ok */
1351                                         break;
1352                                 case 1:         /* entry not sent */
1353                                         break;
1354                                 case -1:        /* connection closed */
1355                                         if (!IS_PSEARCH)
1356                                         bdb_cache_return_entry_r(bdb->bi_dbenv,
1357                                                 &bdb->bi_cache, e, &lock);
1358                                         e = NULL;
1359                                         rs->sr_entry = NULL;
1360                                         rs->sr_err = LDAP_OTHER;
1361                                         goto done;
1362                                 }
1363                         }
1364                 } else {
1365 #ifdef NEW_LOGGING
1366                         LDAP_LOG ( OPERATION, RESULTS,
1367                                 "bdb_search: %ld does not match filter\n", (long) id, 0, 0);
1368 #else
1369                         Debug( LDAP_DEBUG_TRACE,
1370                                 "bdb_search: %ld does not match filter\n",
1371                                 (long) id, 0, 0 );
1372 #endif
1373                 }
1374
1375 loop_continue:
1376                 if( e != NULL ) {
1377                         /* free reader lock */
1378                         if (!IS_PSEARCH) {
1379                                 bdb_cache_return_entry_r( bdb->bi_dbenv,
1380                                         &bdb->bi_cache, e , &lock );
1381                                 if ( sop->o_nocaching ) {
1382                                         bdb_cache_delete_entry( bdb, ei, locker, &lock );
1383                                 }
1384                         }
1385                         e = NULL;
1386                         rs->sr_entry = NULL;
1387                 }
1388
1389                 ldap_pvt_thread_yield();
1390         }
1391
1392         if ( syncUUID_set_cnt > 0 ) {
1393                 rs->sr_err = LDAP_SUCCESS;
1394                 rs->sr_rspoid = LDAP_SYNC_INFO;
1395                 rs->sr_ctrls = NULL;
1396                 slap_send_syncinfo( sop, rs, LDAP_TAG_SYNC_ID_SET,
1397                                                         NULL, 0, syncUUID_set, 0 );
1398                 ber_bvarray_free_x( syncUUID_set, sop->o_tmpmemctx );
1399                 syncUUID_set_cnt = 0;
1400         }
1401
1402 nochange:
1403         if (!IS_PSEARCH) {
1404                 if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1405                         if ( sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
1406                                 struct berval cookie;
1407                                 slap_compose_sync_cookie( sop, &cookie,
1408                                                                                   search_context_csn,
1409                                                                                   sop->o_sync_state.sid,
1410                                                                                   sop->o_sync_state.rid );
1411
1412                                 if ( sync_send_present_mode ) {
1413                                         rs->sr_err = LDAP_SUCCESS;
1414                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1415                                         rs->sr_ctrls = NULL;
1416                                         slap_send_syncinfo( sop, rs,
1417                                                 LDAP_TAG_SYNC_REFRESH_PRESENT, &cookie, 1, NULL, 0 );
1418                                 } else {
1419                                         if ( !no_sync_state_change ) {
1420                                                 int slog_found = 0;
1421                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1422                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
1423                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1424                                                                 if ( ps_list->o_sync_state.sid == sop->o_sync_state.sid ) {
1425                                                                         slog_found = 1;
1426                                                                         break;
1427                                                                 }
1428                                                         }
1429                                                 }
1430
1431                                                 if ( slog_found ) {
1432                                                         rs->sr_err = LDAP_SUCCESS;
1433                                                         rs->sr_rspoid = NULL;
1434                                                         rs->sr_ctrls = NULL;
1435                                                         slap_send_session_log( op, ps_list, rs );
1436                                                 }
1437                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1438                                         }
1439                                         rs->sr_err = LDAP_SUCCESS;
1440                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1441                                         rs->sr_ctrls = NULL;
1442                                         slap_send_syncinfo( sop, rs,
1443                                                 LDAP_TAG_SYNC_REFRESH_DELETE, &cookie, 1, NULL, 0 );
1444                                 }
1445
1446                                 if ( cookie.bv_val ) {
1447                                         ch_free( cookie.bv_val );
1448                                 }
1449                         } else {
1450                                 /* refreshOnly mode */
1451                                 struct berval cookie;
1452                                 slap_compose_sync_cookie( sop, &cookie,
1453                                                                                   search_context_csn,
1454                                                                                   sop->o_sync_state.sid,
1455                                                                                   sop->o_sync_state.rid );
1456
1457                                 if ( sync_send_present_mode ) {
1458                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1459                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
1460                                 } else {
1461                                         if ( !no_sync_state_change ) {
1462                                                 int slog_found = 0;
1463                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1464                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1465                                                                 o_ps_link ) {
1466                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1467                                                                 if ( ps_list->o_sync_state.sid ==
1468                                                                                 sop->o_sync_state.sid ) {
1469                                                                         slog_found = 1;
1470                                                                         break;
1471                                                                 }
1472                                                         }
1473                                                 }
1474
1475                                                 if ( slog_found ) {
1476                                                         slap_send_session_log( op, ps_list, rs );
1477                                                 }
1478                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1479                                         }
1480                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1481                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_DELETES );
1482                                 }
1483
1484                                 rs->sr_ctrls = ctrls;
1485                                 rs->sr_ref = rs->sr_v2ref;
1486                                 rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1487                                 rs->sr_rspoid = NULL;
1488                                 send_ldap_result( sop, rs );
1489                                 if ( ctrls[num_ctrls-1]->ldctl_value.bv_val != NULL ) {
1490                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val, sop->o_tmpmemctx );
1491                                 }
1492                                 sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1493                                 ctrls[num_ctrls] = NULL;
1494                                 if ( cookie.bv_val )
1495                                         ch_free( cookie.bv_val );
1496                         }
1497                 } else {
1498                         rs->sr_ctrls = NULL;
1499                         rs->sr_ref = rs->sr_v2ref;
1500                         rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1501                         rs->sr_rspoid = NULL;
1502                         send_ldap_result( sop, rs );
1503                 }
1504         }
1505
1506         rs->sr_err = LDAP_SUCCESS;
1507
1508 done:
1509         if( !IS_PSEARCH && e != NULL ) {
1510                 /* free reader lock */
1511                 bdb_cache_return_entry_r ( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
1512         }
1513
1514         LOCK_ID_FREE (bdb->bi_dbenv, locker );
1515
1516         ber_bvfree( search_context_csn );
1517
1518         if( rs->sr_v2ref ) {
1519                 ber_bvarray_free( rs->sr_v2ref );
1520                 rs->sr_v2ref = NULL;
1521         }
1522         if( realbase.bv_val ) ch_free( realbase.bv_val );
1523
1524         return rs->sr_err;
1525 }
1526
1527
1528 static int base_candidate(
1529         BackendDB       *be,
1530         Entry   *e,
1531         ID              *ids )
1532 {
1533 #ifdef NEW_LOGGING
1534         LDAP_LOG ( OPERATION, ENTRY,
1535                 "base_candidate: base: \"%s\" (0x%08lx)\n",
1536                 e->e_nname.bv_val, (long) e->e_id, 0);
1537 #else
1538         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
1539                 e->e_nname.bv_val, (long) e->e_id, 0);
1540 #endif
1541
1542         ids[0] = 1;
1543         ids[1] = e->e_id;
1544         return 0;
1545 }
1546
1547 /* Look for "objectClass Present" in this filter.
1548  * Also count depth of filter tree while we're at it.
1549  */
1550 static int oc_filter(
1551         Filter *f,
1552         int cur,
1553         int *max
1554 )
1555 {
1556         int rc = 0;
1557
1558         assert( f );
1559
1560         if( cur > *max ) *max = cur;
1561
1562         switch(f->f_choice) {
1563         case LDAP_FILTER_PRESENT:
1564                 if (f->f_desc == slap_schema.si_ad_objectClass) {
1565                         rc = 1;
1566                 }
1567                 break;
1568
1569         case LDAP_FILTER_AND:
1570         case LDAP_FILTER_OR:
1571                 cur++;
1572                 for (f=f->f_and; f; f=f->f_next) {
1573                         (void) oc_filter(f, cur, max);
1574                 }
1575                 break;
1576
1577         default:
1578                 break;
1579         }
1580         return rc;
1581 }
1582
1583 static void search_stack_free( void *key, void *data )
1584 {
1585         ber_memfree_x(data, NULL);
1586 }
1587
1588 static void *search_stack( Operation *op )
1589 {
1590         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1591         void *ret = NULL;
1592
1593         if ( op->o_threadctx ) {
1594                 ldap_pvt_thread_pool_getkey( op->o_threadctx, search_stack,
1595                         &ret, NULL );
1596         } else {
1597                 ret = bdb->bi_search_stack;
1598         }
1599
1600         if ( !ret ) {
1601                 ret = ch_malloc( bdb->bi_search_stack_depth * BDB_IDL_UM_SIZE
1602                         * sizeof( ID ) );
1603                 if ( op->o_threadctx ) {
1604                         ldap_pvt_thread_pool_setkey( op->o_threadctx, search_stack,
1605                                 ret, search_stack_free );
1606                 } else {
1607                         bdb->bi_search_stack = ret;
1608                 }
1609         }
1610         return ret;
1611 }
1612
1613 static int search_candidates(
1614         Operation *stackop,
1615         Operation *op,
1616         SlapReply *rs,
1617         Entry *e,
1618         u_int32_t locker,
1619         ID      *ids,
1620         ID      *scopes )
1621 {
1622         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1623         int rc, depth = 1;
1624         Filter          f, rf, xf, nf;
1625         ID              *stack;
1626         AttributeAssertion aa_ref;
1627 #ifdef BDB_SUBENTRIES
1628         Filter  sf;
1629         AttributeAssertion aa_subentry;
1630 #endif
1631
1632         /*
1633          * This routine takes as input a filter (user-filter)
1634          * and rewrites it as follows:
1635          *      (&(scope=DN)[(objectClass=subentry)]
1636          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
1637          */
1638
1639 #ifdef NEW_LOGGING
1640         LDAP_LOG ( OPERATION, ENTRY,
1641                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1642                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope);
1643 #else
1644         Debug(LDAP_DEBUG_TRACE,
1645                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1646                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope );
1647 #endif
1648
1649         xf.f_or = op->oq_search.rs_filter;
1650         xf.f_choice = LDAP_FILTER_OR;
1651         xf.f_next = NULL;
1652
1653         /* If the user's filter uses objectClass=*,
1654          * these clauses are redundant.
1655          */
1656         if (!oc_filter(op->oq_search.rs_filter, 1, &depth)
1657                 && !get_subentries_visibility(op)
1658                 && !is_sync_protocol(op) )
1659         {
1660                 if( !get_manageDSAit(op) && !get_domainScope(op) ) {
1661                         /* match referral objects */
1662                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1663                         rf.f_choice = LDAP_FILTER_EQUALITY;
1664                         rf.f_ava = &aa_ref;
1665                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1666                         rf.f_av_value = bv_ref;
1667                         rf.f_next = xf.f_or;
1668                         xf.f_or = &rf;
1669                         depth++;
1670                 }
1671         }
1672
1673         f.f_next = NULL;
1674         f.f_choice = LDAP_FILTER_AND;
1675         f.f_and = &nf;
1676         /* Dummy; we compute scope separately now */
1677         nf.f_choice = SLAPD_FILTER_COMPUTED;
1678         nf.f_result = LDAP_SUCCESS;
1679         nf.f_next = xf.f_or == op->oq_search.rs_filter
1680                 ? op->oq_search.rs_filter : &xf ;
1681         /* Filter depth increased again, adding dummy clause */
1682         depth++;
1683
1684 #ifdef BDB_SUBENTRIES
1685         if( get_subentries_visibility( op ) ) {
1686                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1687                 sf.f_choice = LDAP_FILTER_EQUALITY;
1688                 sf.f_ava = &aa_subentry;
1689                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1690                 sf.f_av_value = bv_subentry;
1691                 sf.f_next = nf.f_next;
1692                 nf.f_next = &sf;
1693         }
1694 #endif
1695
1696         /* Allocate IDL stack, plus 1 more for former tmp */
1697         if ( depth+1 > bdb->bi_search_stack_depth ) {
1698                 stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1699         } else {
1700                 stack = search_stack( stackop );
1701         }
1702
1703         if( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1704                 rc = search_aliases( op, rs, e, locker, ids, scopes, stack );
1705         } else {
1706                 rc = bdb_dn2idl( op, e, ids, stack );
1707         }
1708
1709         if ( rc == LDAP_SUCCESS ) {
1710                 rc = bdb_filter_candidates( op, &f, ids,
1711                         stack, stack+BDB_IDL_UM_SIZE );
1712         }
1713
1714         if ( depth+1 > bdb->bi_search_stack_depth ) {
1715                 ch_free( stack );
1716         }
1717
1718         if( rc ) {
1719 #ifdef NEW_LOGGING
1720                 LDAP_LOG ( OPERATION, DETAIL1,
1721                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1722 #else
1723                 Debug(LDAP_DEBUG_TRACE,
1724                         "bdb_search_candidates: failed (rc=%d)\n",
1725                         rc, NULL, NULL );
1726 #endif
1727
1728         } else {
1729 #ifdef NEW_LOGGING
1730                 LDAP_LOG ( OPERATION, DETAIL1,
1731                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1732                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1733                         (long) BDB_IDL_LAST(ids));
1734 #else
1735                 Debug(LDAP_DEBUG_TRACE,
1736                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1737                         (long) ids[0],
1738                         (long) BDB_IDL_FIRST(ids),
1739                         (long) BDB_IDL_LAST(ids) );
1740 #endif
1741         }
1742
1743         return rc;
1744 }
1745
1746 static void
1747 send_pagerequest_response(
1748         Operation       *op,
1749         SlapReply       *rs,
1750         ID              lastid,
1751         int             tentries )
1752 {
1753         LDAPControl     ctrl, *ctrls[2];
1754         BerElementBuffer berbuf;
1755         BerElement      *ber = (BerElement *)&berbuf;
1756         struct berval   cookie = { 0, NULL };
1757         PagedResultsCookie respcookie;
1758
1759 #ifdef NEW_LOGGING
1760         LDAP_LOG ( OPERATION, ENTRY,
1761                 "send_pagerequest_response: lastid: (0x%08lx) "
1762                 "nentries: (0x%081x)\n",
1763                 lastid, rs->sr_nentries, NULL );
1764 #else
1765         Debug(LDAP_DEBUG_ARGS, "send_pagerequest_response: lastid: (0x%08lx) "
1766                         "nentries: (0x%081x)\n", lastid, rs->sr_nentries, NULL );
1767 #endif
1768
1769         ctrl.ldctl_value.bv_val = NULL;
1770         ctrls[0] = &ctrl;
1771         ctrls[1] = NULL;
1772
1773         ber_init2( ber, NULL, LBER_USE_DER );
1774
1775         respcookie = ( PagedResultsCookie )lastid;
1776         op->o_conn->c_pagedresults_state.ps_cookie = respcookie;
1777         cookie.bv_len = sizeof( respcookie );
1778         cookie.bv_val = (char *)&respcookie;
1779
1780         /*
1781          * FIXME: we should consider sending an estimate of the entries
1782          * left, after appropriate security check is done
1783          */
1784         ber_printf( ber, "{iO}", tentries, &cookie );
1785
1786         if ( ber_flatten2( ber, &ctrls[0]->ldctl_value, 0 ) == -1 ) {
1787                 goto done;
1788         }
1789
1790         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1791         ctrls[0]->ldctl_iscritical = 0;
1792
1793         rs->sr_ctrls = ctrls;
1794         rs->sr_err = LDAP_SUCCESS;
1795         send_ldap_result( op, rs );
1796
1797 done:
1798         (void) ber_free_buf( ber );
1799 }