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 2000-2004 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                 /* Remember the last entry we looked at, so we can
  69                  * report broken links
  70                  */
  71                 *matched = e;
  72
  73                 /* If this is part of a subtree or onelevel search,
  74                  * have we seen this ID before? If so, quit.
  75                  */
  76                 if ( visited && bdb_idl_insert( visited, e->e_id ) ) {
  77                         e = NULL;
  78                         break;
  79                 }
  80
  81                 /* If we've seen this ID during this deref iteration,
  82                  * we've hit a loop.
  83                  */
  84                 if ( bdb_idl_insert( tmp, e->e_id ) ) {
  85                         rs->sr_err = LDAP_ALIAS_PROBLEM;
  86                         rs->sr_text = "circular alias";
  87                         e = NULL;
  88                         break;
  89                 }
  90
  91                 /* If there was a problem getting the aliasedObjectName,
  92                  * get_alias_dn will have set the error status.
  93                  */
  94                 if ( get_alias_dn(e, &ndn, &rs->sr_err, &rs->sr_text) ) {
  95                         e = NULL;
  96                         break;
  97                 }
  98
  99                 rs->sr_err = bdb_dn2entry( op, NULL, &ndn, &ei,
 100                         0, locker, &lockr );
 101
 102                 if ( ei ) {
 103                         e = ei->bei_e;
 104                 } else {
 105                         e = NULL;
 106                 }
 107
 108                 if (!e) {
 109                         rs->sr_err = LDAP_ALIAS_PROBLEM;
 110                         rs->sr_text = "aliasedObject not found";
 111                         break;
 112                 }
 113
 114                 /* Free the previous entry, continue to work with the
 115                  * one we just retrieved.
 116                  */
 117                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 118                         *matched, lock);
 119                 *lock = lockr;
 120
 121                 /* We found a regular entry. Return this to the caller. The
 122                  * entry is still locked for Read.
 123                  */
 124                 if (!is_entry_alias(e)) {
 125                         rs->sr_err = LDAP_SUCCESS;
 126                         rs->sr_text = NULL;
 127                         break;
 128                 }
 129         }
 130         return e;
 131 }
 132
 133 /* Look for and dereference all aliases within the search scope. Adds
 134  * the dereferenced entries to the "ids" list. Requires "stack" to be
 135  * able to hold 8 levels of DB_SIZE IDLs. Of course we're hardcoded to
 136  * require a minimum of 8 UM_SIZE IDLs so this is never a problem.
 137  */
 138 static int search_aliases(
 139         Operation *op,
 140         SlapReply *rs,
 141         Entry *e,
 142         u_int32_t locker,
 143         ID *ids,
 144         ID *scopes,
 145         ID *stack )
 146 {
 147         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 148         ID *aliases, *curscop, *subscop, *visited, *newsubs, *oldsubs, *tmp;
 149         ID cursora, ida, cursoro, ido, *subscop2;
 150         Entry *matched, *a;
 151         EntryInfo *ei;
 152         struct berval bv_alias = { sizeof("alias")-1, "alias" };
 153         AttributeAssertion aa_alias;
 154         Filter  af;
 155         DB_LOCK locka, lockr;
 156         int first = 1;
 157
 158         aliases = stack;        /* IDL of all aliases in the database */
 159         curscop = aliases + BDB_IDL_DB_SIZE;    /* Aliases in the current scope */
 160         subscop = curscop + BDB_IDL_DB_SIZE;    /* The current scope */
 161         visited = subscop + BDB_IDL_DB_SIZE;    /* IDs we've seen in this search */
 162         newsubs = visited + BDB_IDL_DB_SIZE;    /* New subtrees we've added */
 163         oldsubs = newsubs + BDB_IDL_DB_SIZE;    /* Subtrees added previously */
 164         tmp = oldsubs + BDB_IDL_DB_SIZE;        /* Scratch space for deref_base() */
 165
 166         /* A copy of subscop, because subscop gets clobbered by
 167          * the bdb_idl_union/intersection routines
 168          */
 169         subscop2 = tmp + BDB_IDL_DB_SIZE;
 170
 171         af.f_choice = LDAP_FILTER_EQUALITY;
 172         af.f_ava = &aa_alias;
 173         af.f_av_desc = slap_schema.si_ad_objectClass;
 174         af.f_av_value = bv_alias;
 175         af.f_next = NULL;
 176
 177         /* Find all aliases in database */
 178         BDB_IDL_ZERO( aliases );
 179         rs->sr_err = bdb_filter_candidates( op, &af, aliases,
 180                 curscop, visited );
 181         if (rs->sr_err != LDAP_SUCCESS) {
 182                 return rs->sr_err;
 183         }
 184         oldsubs[0] = 1;
 185         oldsubs[1] = e->e_id;
 186
 187         BDB_IDL_ZERO( ids );
 188         BDB_IDL_ZERO( visited );
 189         BDB_IDL_ZERO( newsubs );
 190
 191         cursoro = 0;
 192         ido = bdb_idl_first( oldsubs, &cursoro );
 193
 194         for (;;) {
 195                 /* Set curscop to only the aliases in the current scope. Start with
 196                  * all the aliases, obtain the IDL for the current scope, and then
 197                  * get the intersection of these two IDLs. Add the current scope
 198                  * to the cumulative list of candidates.
 199                  */
 200                 BDB_IDL_CPY( curscop, aliases );
 201                 rs->sr_err = bdb_dn2idl( op, e, subscop,
 202                         subscop2+BDB_IDL_DB_SIZE );
 203                 if (first) {
 204                         first = 0;
 205                 } else {
 206                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, e, &locka);
 207                 }
 208                 BDB_IDL_CPY(subscop2, subscop);
 209                 rs->sr_err = bdb_idl_intersection(curscop, subscop);
 210                 bdb_idl_union( ids, subscop2 );
 211
 212                 /* Dereference all of the aliases in the current scope. */
 213                 cursora = 0;
 214                 for (ida = bdb_idl_first(curscop, &cursora); ida != NOID;
 215                         ida = bdb_idl_next(curscop, &cursora))
 216                 {
 217                         ei = NULL;
 218                         rs->sr_err = bdb_cache_find_id(op, NULL,
 219                                 ida, &ei, 0, locker, &lockr );
 220                         if (rs->sr_err != LDAP_SUCCESS) {
 221                                 continue;
 222                         }
 223                         a = ei->bei_e;
 224
 225                         /* This should only happen if the curscop IDL has maxed out and
 226                          * turned into a range that spans IDs indiscriminately
 227                          */
 228                         if (!is_entry_alias(a)) {
 229                                 bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 230                                         a, &lockr);
 231                                 continue;
 232                         }
 233
 234                         /* Actually dereference the alias */
 235                         BDB_IDL_ZERO(tmp);
 236                         a = deref_base( op, rs, a, &matched, locker, &lockr,
 237                                 tmp, visited );
 238                         if (a) {
 239                                 /* If the target was not already in our current candidates,
 240                                  * make note of it in the newsubs list. Also
 241                                  * set it in the scopes list so that bdb_search
 242                                  * can check it.
 243                                  */
 244                                 if (bdb_idl_insert(ids, a->e_id) == 0) {
 245                                         bdb_idl_insert(newsubs, a->e_id);
 246                                         bdb_idl_insert(scopes, a->e_id);
 247                                 }
 248                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 249                                         a, &lockr);
 250
 251                         } else if (matched) {
 252                                 /* Alias could not be dereferenced, or it deref'd to
 253                                  * an ID we've already seen. Ignore it.
 254                                  */
 255                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 256                                         matched, &lockr );
 257                                 rs->sr_text = NULL;
 258                         }
 259                 }
 260                 /* If this is a OneLevel search, we're done; oldsubs only had one
 261                  * ID in it. For a Subtree search, oldsubs may be a list of scope IDs.
 262                  */
 263                 if ( op->ors_scope == LDAP_SCOPE_ONELEVEL ) break;
 264 nextido:
 265                 ido = bdb_idl_next( oldsubs, &cursoro );
 266
 267                 /* If we're done processing the old scopes, did we add any new
 268                  * scopes in this iteration? If so, go back and do those now.
 269                  */
 270                 if (ido == NOID) {
 271                         if (BDB_IDL_IS_ZERO(newsubs)) break;
 272                         BDB_IDL_CPY(oldsubs, newsubs);
 273                         BDB_IDL_ZERO(newsubs);
 274                         cursoro = 0;
 275                         ido = bdb_idl_first( oldsubs, &cursoro );
 276                 }
 277
 278                 /* Find the entry corresponding to the next scope. If it can't
 279                  * be found, ignore it and move on. This should never happen;
 280                  * we should never see the ID of an entry that doesn't exist.
 281                  * Set the name so that the scope's IDL can be retrieved.
 282                  */
 283                 ei = NULL;
 284                 rs->sr_err = bdb_cache_find_id(op, NULL, ido, &ei,
 285                         0, locker, &locka );
 286                 if ( rs->sr_err != LDAP_SUCCESS ) goto nextido;
 287                 e = ei->bei_e;
 288         }
 289         return rs->sr_err;
 290 }
 291
 292 #define is_sync_protocol(op)    \
 293         ((op)->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST)
 294
 295 #define IS_BDB_REPLACE(type) (( type == LDAP_PSEARCH_BY_DELETE ) || \
 296         ( type == LDAP_PSEARCH_BY_SCOPEOUT ))
 297 #define IS_PSEARCH (op != sop)
 298
 299 static Operation *
 300 bdb_drop_psearch( Operation *op, ber_int_t msgid )
 301 {
 302         Operation       *ps_list;
 303         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 304
 305         LDAP_LIST_FOREACH ( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 306                 if ( ps_list->o_connid == op->o_connid ) {
 307                         if ( ps_list->o_msgid == msgid ) {
 308                                 ps_list->o_abandon = 1;
 309                                 LDAP_LIST_REMOVE( ps_list, o_ps_link );
 310                                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 311                                 LDAP_STAILQ_REMOVE( &op->o_conn->c_ops, ps_list,
 312                                         slap_op, o_next );
 313                                 LDAP_STAILQ_NEXT( ps_list, o_next ) = NULL;
 314                                 op->o_conn->c_n_ops_executing--;
 315                                 op->o_conn->c_n_ops_completed++;
 316                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 317                                 return ps_list;
 318                         }
 319                 }
 320         }
 321
 322         return NULL;
 323 }
 324
 325 int
 326 bdb_abandon( Operation *op, SlapReply *rs )
 327 {
 328         Operation       *ps;
 329
 330         ps = bdb_drop_psearch( op, op->oq_abandon.rs_msgid );
 331         if ( ps ) {
 332                 if ( ps->o_tmpmemctx ) {
 333                         sl_mem_destroy( NULL, ps->o_tmpmemctx );
 334                 }
 335                 slap_op_free ( ps );
 336                 return LDAP_SUCCESS;
 337         }
 338         return LDAP_UNAVAILABLE;
 339 }
 340
 341 int
 342 bdb_cancel( Operation *op, SlapReply *rs )
 343 {
 344         Operation       *ps;
 345
 346         ps = bdb_drop_psearch( op, op->oq_cancel.rs_msgid );
 347         if ( ps ) {
 348                 rs->sr_err = LDAP_CANCELLED;
 349                 send_ldap_result( ps, rs );
 350                 if ( ps->o_tmpmemctx ) {
 351                         sl_mem_destroy( NULL, ps->o_tmpmemctx );
 352                 }
 353                 slap_op_free ( ps );
 354                 return LDAP_SUCCESS;
 355         }
 356         return LDAP_UNAVAILABLE;
 357 }
 358
 359 int bdb_search( Operation *op, SlapReply *rs )
 360 {
 361         return bdb_do_search( op, rs, op, NULL, 0 );
 362 }
 363
 364 /* For persistent searches, op is the currently executing operation,
 365  * sop is the persistent search. For regular searches, sop = op.
 366  */
 367 int
 368 bdb_do_search( Operation *op, SlapReply *rs, Operation *sop,
 369         Entry *ps_e, int ps_type )
 370 {
 371         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 372         time_t          stoptime;
 373         ID              id, cursor;
 374         ID              candidates[BDB_IDL_UM_SIZE];
 375         ID              scopes[BDB_IDL_DB_SIZE];
 376         Entry           *e = NULL, base;
 377         Entry   *matched = NULL;
 378         EntryInfo       *ei;
 379         struct berval   realbase = { 0, NULL };
 380         int             manageDSAit;
 381         int             tentries = 0;
 382         ID              lastid = NOID;
 383         AttributeName   *attrs;
 384
 385         Filter contextcsnand, contextcsnle, cookief, csnfnot,
 386                 csnfeq, csnfand, csnfge;
 387         AttributeAssertion aa_ge, aa_eq, aa_le;
 388         int             entry_count = 0;
 389         struct berval *search_context_csn = NULL;
 390         DB_LOCK         ctxcsn_lock;
 391         LDAPControl     *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
 392         int             num_ctrls = 0;
 393         AttributeName   uuid_attr[2];
 394         int             rc_sync = 0;
 395         int             entry_sync_state = -1;
 396         AttributeName   null_attr;
 397         int             no_sync_state_change = 0;
 398         struct slap_limits_set *limit = NULL;
 399         int isroot = 0;
 400
 401         u_int32_t       locker = 0;
 402         DB_LOCK         lock;
 403
 404         Operation       *ps_list;
 405         int                     sync_send_present_mode = 1;
 406         int                     match;
 407         MatchingRule *mr;
 408         const char *text;
 409         int                     slog_found = 0;
 410
 411         BerVarray       syncUUID_set = NULL;
 412         int                     syncUUID_set_cnt = 0;
 413
 414 #ifdef NEW_LOGGING
 415         LDAP_LOG( OPERATION, ENTRY, "bdb_search\n", 0, 0, 0 );
 416 #else
 417         Debug( LDAP_DEBUG_TRACE, "=> bdb_search\n",
 418                 0, 0, 0);
 419 #endif
 420         attrs = sop->oq_search.rs_attrs;
 421
 422         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST ) {
 423                 struct slap_session_entry *sent;
 424                 if ( sop->o_sync_state.sid >= 0 ) {
 425                         LDAP_LIST_FOREACH( sent, &bdb->bi_session_list, se_link ) {
 426                                 if ( sent->se_id == sop->o_sync_state.sid ) {
 427                                         sop->o_sync_slog_size = sent->se_size;
 428                                         break;
 429                                 }
 430                         }
 431                 }
 432         }
 433
 434         /* psearch needs to be registered before refresh begins */
 435         /* psearch and refresh transmission is serialized in send_ldap_ber() */
 436         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
 437                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 438                 LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 439                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 440
 441         } else if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST
 442                 && sop->o_sync_slog_size >= 0 )
 443         {
 444                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 445                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 446                         if ( ps_list->o_sync_slog_size >= 0 ) {
 447                                 if ( ps_list->o_sync_state.sid == sop->o_sync_state.sid ) {
 448                                         slog_found = 1;
 449                                         break;
 450                                 }
 451                         }
 452                 }
 453
 454                 if ( slog_found ) {
 455                         if ( ps_list->o_sync_slog_omitcsn.bv_len != 0 ) {
 456                                 mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 457                                 if ( sop->o_sync_state.ctxcsn &&
 458                                         sop->o_sync_state.ctxcsn->bv_val != NULL )
 459                                 {
 460                                         value_match( &match, slap_schema.si_ad_entryCSN, mr,
 461                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 462                                                 sop->o_sync_state.ctxcsn,
 463                                                 &ps_list->o_sync_slog_omitcsn,
 464                                                 &text );
 465                                 } else {
 466                                         match = -1;
 467                                 }
 468                                 if ( match >= 0 ) {
 469                                         sync_send_present_mode = 0;
 470                                 }
 471                         } else {
 472                                 sync_send_present_mode = 0;
 473                         }
 474                 } else if ( sop->o_sync_slog_size >= 0 ) {
 475                         LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 476                 } else {
 477                         sop->o_sync_state.sid = -1;
 478                 }
 479                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 480         }
 481
 482         null_attr.an_desc = NULL;
 483         null_attr.an_oc = NULL;
 484         null_attr.an_oc_exclude = 0;
 485         null_attr.an_name.bv_len = 0;
 486         null_attr.an_name.bv_val = NULL;
 487
 488         for( num_ctrls = 0; num_ctrls < SLAP_MAX_RESPONSE_CONTROLS; num_ctrls++ ) {
 489                 ctrls[num_ctrls] = NULL;
 490         }
 491         num_ctrls = 0;
 492
 493         if ( IS_PSEARCH && IS_BDB_REPLACE(ps_type)) {
 494                 attrs = uuid_attr;
 495                 attrs[0].an_desc = NULL;
 496                 attrs[0].an_oc = NULL;
 497                 attrs[0].an_oc_exclude = 0;
 498                 attrs[0].an_name.bv_len = 0;
 499                 attrs[0].an_name.bv_val = NULL;
 500         }
 501
 502         manageDSAit = get_manageDSAit( sop );
 503
 504         /* Sync control overrides manageDSAit */
 505         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
 506                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 507                         manageDSAit = SLAP_CRITICAL_CONTROL;
 508                 }
 509         } else if ( IS_PSEARCH ) {
 510                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 511                         manageDSAit = SLAP_CRITICAL_CONTROL;
 512                 }
 513         }
 514
 515         rs->sr_err = LOCK_ID( bdb->bi_dbenv, &locker );
 516
 517         switch(rs->sr_err) {
 518         case 0:
 519                 break;
 520         default:
 521                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 522                 return rs->sr_err;
 523         }
 524
 525         if ( sop->o_req_ndn.bv_len == 0 ) {
 526                 /* DIT root special case */
 527                 e = (Entry *) &slap_entry_root;
 528                 rs->sr_err = LDAP_SUCCESS;
 529         } else {
 530 dn2entry_retry:
 531                 /* get entry with reader lock */
 532                 rs->sr_err = bdb_dn2entry( op, NULL, &sop->o_req_ndn, &ei,
 533                         1, locker, &lock );
 534         }
 535
 536         switch(rs->sr_err) {
 537         case DB_NOTFOUND:
 538                 matched = ei->bei_e;
 539                 break;
 540         case 0:
 541                 e = ei->bei_e;
 542                 break;
 543         case LDAP_BUSY:
 544                 send_ldap_error( sop, rs, LDAP_BUSY, "ldap server busy" );
 545                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 546                 return LDAP_BUSY;
 547         case DB_LOCK_DEADLOCK:
 548         case DB_LOCK_NOTGRANTED:
 549                 goto dn2entry_retry;
 550         default:
 551                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 552                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 553                 return rs->sr_err;
 554         }
 555
 556         if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
 557                 BDB_IDL_ZERO(candidates);
 558                 e = deref_base( op, rs, e, &matched, locker, &lock,
 559                         candidates, NULL );
 560         }
 561
 562         if ( e == NULL ) {
 563                 struct berval matched_dn = { 0, NULL };
 564
 565                 if ( matched != NULL ) {
 566                         BerVarray erefs;
 567                         ber_dupbv( &matched_dn, &matched->e_name );
 568
 569                         erefs = is_entry_referral( matched )
 570                                 ? get_entry_referrals( op, matched )
 571                                 : NULL;
 572
 573                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 574                                 matched, &lock);
 575                         matched = NULL;
 576
 577                         if( erefs ) {
 578                                 rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 579                                         &sop->o_req_dn, sop->oq_search.rs_scope );
 580                                 ber_bvarray_free( erefs );
 581                         }
 582
 583                 } else {
 584                         rs->sr_ref = referral_rewrite( default_referral,
 585                                 NULL, &sop->o_req_dn, sop->oq_search.rs_scope );
 586                 }
 587
 588                 rs->sr_err = LDAP_REFERRAL;
 589                 rs->sr_matched = matched_dn.bv_val;
 590                 send_ldap_result( sop, rs );
 591
 592                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 593                 if ( rs->sr_ref ) {
 594                         ber_bvarray_free( rs->sr_ref );
 595                         rs->sr_ref = NULL;
 596                 }
 597                 if ( matched_dn.bv_val ) {
 598                         ber_memfree( matched_dn.bv_val );
 599                         rs->sr_matched = NULL;
 600                 }
 601                 return rs->sr_err;
 602         }
 603
 604         if ( !manageDSAit && e != &slap_entry_root && is_entry_referral( e ) ) {
 605                 /* entry is a referral, don't allow add */
 606                 struct berval matched_dn;
 607                 BerVarray erefs;
 608
 609                 ber_dupbv( &matched_dn, &e->e_name );
 610                 erefs = get_entry_referrals( op, e );
 611
 612                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 613                 e = NULL;
 614
 615                 if( erefs ) {
 616                         rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 617                                 &sop->o_req_dn, sop->oq_search.rs_scope );
 618                         ber_bvarray_free( erefs );
 619                 }
 620
 621 #ifdef NEW_LOGGING
 622                 LDAP_LOG ( OPERATION, RESULTS,
 623                         "bdb_search: entry is referral\n", 0, 0, 0 );
 624 #else
 625                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 626                         0, 0, 0 );
 627 #endif
 628
 629                 if (!rs->sr_ref) rs->sr_text = "bad_referral object";
 630                 rs->sr_err = LDAP_REFERRAL;
 631                 rs->sr_matched = matched_dn.bv_val;
 632                 send_ldap_result( sop, rs );
 633
 634                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 635                 ber_bvarray_free( rs->sr_ref );
 636                 rs->sr_ref = NULL;
 637                 ber_memfree( matched_dn.bv_val );
 638                 rs->sr_matched = NULL;
 639                 return 1;
 640         }
 641
 642         if ( get_assert( op ) &&
 643                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 644         {
 645                 rs->sr_err = LDAP_ASSERTION_FAILED;
 646                 send_ldap_result( sop, rs );
 647                 return 1;
 648         }
 649
 650         /* if not root, get appropriate limits */
 651         if ( be_isroot( op->o_bd, &sop->o_ndn ) ) {
 652                 isroot = 1;
 653         } else {
 654                 ( void ) get_limits( op->o_bd, &sop->o_ndn, &limit );
 655         }
 656
 657         /* The time/size limits come first because they require very little
 658          * effort, so there's no chance the candidates are selected and then
 659          * the request is not honored only because of time/size constraints
 660          */
 661
 662         /* if no time limit requested, use soft limit (unless root!) */
 663         if ( isroot ) {
 664                 if ( sop->oq_search.rs_tlimit == 0 ) {
 665                         sop->oq_search.rs_tlimit = -1;  /* allow root to set no limit */
 666                 }
 667
 668                 if ( sop->oq_search.rs_slimit == 0 ) {
 669                         sop->oq_search.rs_slimit = -1;
 670                 }
 671
 672         } else {
 673                 /* if no limit is required, use soft limit */
 674                 if ( sop->oq_search.rs_tlimit <= 0 ) {
 675                         sop->oq_search.rs_tlimit = limit->lms_t_soft;
 676
 677                 /* if requested limit higher than hard limit, abort */
 678                 } else if ( sop->oq_search.rs_tlimit > limit->lms_t_hard ) {
 679                         /* no hard limit means use soft instead */
 680                         if ( limit->lms_t_hard == 0
 681                                         && limit->lms_t_soft > -1
 682                                         && sop->oq_search.rs_tlimit > limit->lms_t_soft ) {
 683                                 sop->oq_search.rs_tlimit = limit->lms_t_soft;
 684
 685                         /* positive hard limit means abort */
 686                         } else if ( limit->lms_t_hard > 0 ) {
 687                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 688                                 send_ldap_result( sop, rs );
 689                                 rs->sr_err = LDAP_SUCCESS;
 690                                 goto done;
 691                         }
 692
 693                         /* negative hard limit means no limit */
 694                 }
 695
 696                 /* if no limit is required, use soft limit */
 697                 if ( sop->oq_search.rs_slimit <= 0 ) {
 698                         if ( get_pagedresults(sop) && limit->lms_s_pr != 0 ) {
 699                                 sop->oq_search.rs_slimit = limit->lms_s_pr;
 700                         } else {
 701                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 702                         }
 703
 704                 /* if requested limit higher than hard limit, abort */
 705                 } else if ( sop->oq_search.rs_slimit > limit->lms_s_hard ) {
 706                         /* no hard limit means use soft instead */
 707                         if ( limit->lms_s_hard == 0
 708                                         && limit->lms_s_soft > -1
 709                                         && sop->oq_search.rs_slimit > limit->lms_s_soft ) {
 710                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 711
 712                         /* positive hard limit means abort */
 713                         } else if ( limit->lms_s_hard > 0 ) {
 714                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 715                                 send_ldap_result( sop, rs );
 716                                 rs->sr_err = LDAP_SUCCESS;
 717                                 goto done;
 718                         }
 719
 720                         /* negative hard limit means no limit */
 721                 }
 722         }
 723
 724         /* compute it anyway; root does not use it */
 725         stoptime = op->o_time + sop->oq_search.rs_tlimit;
 726
 727         /* need normalized dn below */
 728         ber_dupbv( &realbase, &e->e_nname );
 729
 730         /* Copy info to base, must free entry before accessing the database
 731          * in search_candidates, to avoid deadlocks.
 732          */
 733         base.e_private = e->e_private;
 734         base.e_nname = realbase;
 735         base.e_id = e->e_id;
 736
 737         if ( e != &slap_entry_root ) {
 738                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 739         }
 740         e = NULL;
 741
 742         if ( !IS_PSEARCH ) {
 743                 rs->sr_err = bdb_get_commit_csn( sop, rs, &search_context_csn,
 744                         locker, &ctxcsn_lock );
 745
 746                 if ( rs->sr_err != LDAP_SUCCESS ) {
 747                         send_ldap_error( sop, rs, rs->sr_err,
 748                                 "error in csn management in search" );
 749                         goto done;
 750                 }
 751
 752                 if ( sop->o_sync_mode != SLAP_SYNC_NONE &&
 753                         sop->o_sync_state.ctxcsn &&
 754                         sop->o_sync_state.ctxcsn->bv_val &&
 755                         ber_bvcmp( &sop->o_sync_state.ctxcsn[0], search_context_csn ) == 0 )
 756                 {
 757                         bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 758                         goto nochange;
 759                 }
 760         } else {
 761                 search_context_csn = ber_dupbv( NULL, &op->o_sync_csn );
 762         }
 763
 764         /* select candidates */
 765         if ( sop->oq_search.rs_scope == LDAP_SCOPE_BASE ) {
 766                 rs->sr_err = base_candidate( op->o_bd, &base, candidates );
 767
 768         } else {
 769                 BDB_IDL_ZERO( candidates );
 770                 BDB_IDL_ZERO( scopes );
 771                 rs->sr_err = search_candidates( op, sop, rs, &base,
 772                         locker, candidates, scopes );
 773         }
 774
 775         if ( !IS_PSEARCH && sop->o_sync_mode != SLAP_SYNC_NONE ) {
 776                 bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 777         }
 778
 779         /* start cursor at beginning of candidates.
 780          */
 781         cursor = 0;
 782         if (IS_PSEARCH) {
 783                 if ( !BDB_IDL_IS_RANGE( candidates ) ) {
 784                         cursor = bdb_idl_search( candidates, ps_e->e_id );
 785                         if ( candidates[cursor] != ps_e->e_id ) {
 786                                 rs->sr_err = LDAP_SUCCESS;
 787                                 goto done;
 788                         }
 789                 } else if ( ps_e->e_id < BDB_IDL_RANGE_FIRST( candidates ) ||
 790                         ps_e->e_id > BDB_IDL_RANGE_LAST( candidates ))
 791                 {
 792                         rs->sr_err = LDAP_SUCCESS;
 793                         goto done;
 794                 }
 795                 candidates[0] = 1;
 796                 candidates[1] = ps_e->e_id;
 797         }
 798
 799         if ( candidates[0] == 0 ) {
 800 #ifdef NEW_LOGGING
 801                 LDAP_LOG ( OPERATION, RESULTS,
 802                         "bdb_search: no candidates\n", 0, 0, 0 );
 803 #else
 804                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 805                         0, 0, 0 );
 806 #endif
 807
 808                 rs->sr_err = LDAP_SUCCESS;
 809                 rs->sr_entry = NULL;
 810                 send_ldap_result( sop, rs );
 811                 goto done;
 812         }
 813
 814         /* if not root and candidates exceed to-be-checked entries, abort */
 815         if ( !isroot && limit->lms_s_unchecked != -1 ) {
 816                 if ( BDB_IDL_N(candidates) > (unsigned) limit->lms_s_unchecked ) {
 817                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 818                         send_ldap_result( sop, rs );
 819                         rs->sr_err = LDAP_SUCCESS;
 820                         goto done;
 821                 }
 822         }
 823
 824         if ( isroot || !limit->lms_s_pr_hide ) {
 825                 tentries = BDB_IDL_N(candidates);
 826         }
 827
 828         if ( get_pagedresults(sop) ) {
 829                 if ( sop->o_pagedresults_state.ps_cookie == 0 ) {
 830                         id = 0;
 831                 } else {
 832                         if ( sop->o_pagedresults_size == 0 ) {
 833                                 rs->sr_err = LDAP_SUCCESS;
 834                                 rs->sr_text = "search abandoned by pagedResult size=0";
 835                                 send_ldap_result( sop, rs );
 836                                 goto done;
 837                         }
 838                         for ( id = bdb_idl_first( candidates, &cursor );
 839                                 id != NOID && id <= (ID)( sop->o_pagedresults_state.ps_cookie );
 840                                 id = bdb_idl_next( candidates, &cursor ) ) /* empty */;
 841                 }
 842                 if ( cursor == NOID ) {
 843 #ifdef NEW_LOGGING
 844                         LDAP_LOG ( OPERATION, RESULTS,
 845                                 "bdb_search: no paged results candidates\n",
 846                         0, 0, 0 );
 847 #else
 848                         Debug( LDAP_DEBUG_TRACE,
 849                                 "bdb_search: no paged results candidates\n",
 850                                 0, 0, 0 );
 851 #endif
 852                         send_pagerequest_response( sop, rs, lastid, 0 );
 853
 854                         rs->sr_err = LDAP_OTHER;
 855                         goto done;
 856                 }
 857                 goto loop_begin;
 858         }
 859
 860         if (( sop->o_sync_mode & SLAP_SYNC_REFRESH ) || IS_PSEARCH ) {
 861                 int match;
 862
 863                 cookief.f_choice = LDAP_FILTER_AND;
 864                 cookief.f_and = &csnfnot;
 865                 cookief.f_next = NULL;
 866
 867                 csnfnot.f_choice = LDAP_FILTER_NOT;
 868                 csnfnot.f_not = &csnfeq;
 869                 csnfnot.f_next = &csnfand;
 870
 871                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 872                 csnfeq.f_ava = &aa_eq;
 873                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 874                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 875                         csnfeq.f_av_value = *sop->o_sync_state.ctxcsn;
 876                 } else {
 877                         csnfeq.f_av_value = slap_empty_bv;
 878                 }
 879
 880                 csnfand.f_choice = LDAP_FILTER_AND;
 881                 csnfand.f_and = &csnfge;
 882                 csnfand.f_next = NULL;
 883
 884                 csnfge.f_choice = LDAP_FILTER_GE;
 885                 csnfge.f_ava = &aa_ge;
 886                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 887                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 888                         csnfge.f_av_value = *sop->o_sync_state.ctxcsn;
 889                 } else {
 890                         csnfge.f_av_value = slap_empty_bv;
 891                 }
 892
 893                 if ( search_context_csn && !IS_PSEARCH ) {
 894                         csnfge.f_next = &contextcsnand;
 895
 896                         contextcsnand.f_choice = LDAP_FILTER_AND;
 897                         contextcsnand.f_and = &contextcsnle;
 898                         contextcsnand.f_next = NULL;
 899
 900                         contextcsnle.f_choice = LDAP_FILTER_LE;
 901                         contextcsnle.f_ava = &aa_le;
 902                         contextcsnle.f_av_desc = slap_schema.si_ad_entryCSN;
 903                         contextcsnle.f_av_value = *search_context_csn;
 904                         contextcsnle.f_next = sop->oq_search.rs_filter;
 905
 906                         mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 907                         if ( sop->o_sync_state.ctxcsn &&
 908                                 sop->o_sync_state.ctxcsn->bv_val != NULL )
 909                         {
 910                                 value_match( &match, slap_schema.si_ad_entryCSN, mr,
 911                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 912                                                 &sop->o_sync_state.ctxcsn[0], search_context_csn,
 913                                                 &text );
 914                         } else {
 915                                 match = -1;
 916                         }
 917                         no_sync_state_change = ( match >= 0 );
 918                 } else {
 919                         csnfge.f_next = sop->oq_search.rs_filter;
 920                 }
 921         }
 922
 923         for ( id = bdb_idl_first( candidates, &cursor );
 924                 id != NOID && !no_sync_state_change;
 925                 id = bdb_idl_next( candidates, &cursor ) )
 926         {
 927                 int scopeok = 0;
 928
 929 loop_begin:
 930                 /* check for abandon */
 931                 if ( sop->o_abandon ) {
 932                         if ( sop != op ) {
 933                                 bdb_drop_psearch( sop, sop->o_msgid );
 934                         }
 935                         rs->sr_err = LDAP_SUCCESS;
 936                         goto done;
 937                 }
 938
 939                 if ( sop->o_cancel ) {
 940                         assert( sop->o_cancel == SLAP_CANCEL_REQ );
 941                         rs->sr_err = LDAP_CANCELLED;
 942                         send_ldap_result( sop, rs );
 943                         sop->o_cancel = SLAP_CANCEL_ACK;
 944                         rs->sr_err = LDAP_SUCCESS;
 945                         goto done;
 946                 }
 947
 948                 /* check time limit */
 949                 if ( sop->oq_search.rs_tlimit != -1 && slap_get_time() > stoptime ) {
 950                         rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 951                         rs->sr_ref = rs->sr_v2ref;
 952                         send_ldap_result( sop, rs );
 953                         rs->sr_err = LDAP_SUCCESS;
 954                         goto done;
 955                 }
 956
 957                 if (!IS_PSEARCH) {
 958 id2entry_retry:
 959                         /* get the entry with reader lock */
 960                         ei = NULL;
 961                         rs->sr_err = bdb_cache_find_id( op, NULL,
 962                                 id, &ei, 0, locker, &lock );
 963
 964                         if (rs->sr_err == LDAP_BUSY) {
 965                                 rs->sr_text = "ldap server busy";
 966                                 send_ldap_result( sop, rs );
 967                                 goto done;
 968
 969                         } else if ( rs->sr_err == DB_LOCK_DEADLOCK
 970                                 || rs->sr_err == DB_LOCK_NOTGRANTED )
 971                         {
 972                                 goto id2entry_retry;
 973                         }
 974
 975                         if ( ei && rs->sr_err == LDAP_SUCCESS ) {
 976                                 e = ei->bei_e;
 977                         } else {
 978                                 e = NULL;
 979                         }
 980
 981                         if ( e == NULL ) {
 982                                 if( !BDB_IDL_IS_RANGE(candidates) ) {
 983                                         /* only complain for non-range IDLs */
 984 #ifdef NEW_LOGGING
 985                                         LDAP_LOG ( OPERATION, RESULTS,
 986                                                 "bdb_search: candidate %ld not found\n",
 987                                                 (long) id, 0, 0);
 988 #else
 989                                         Debug( LDAP_DEBUG_TRACE,
 990                                                 "bdb_search: candidate %ld not found\n",
 991                                                 (long) id, 0, 0 );
 992 #endif
 993                                 }
 994
 995                                 goto loop_continue;
 996                         }
 997                 } else {
 998                         e = ps_e;
 999                 }
1000
1001                 rs->sr_entry = e;
1002
1003 #ifdef BDB_SUBENTRIES
1004                 /* FIXME: send all but syncrepl */
1005 #if 0
1006                 if ( !is_sync_protocol( sop ) )
1007 #endif
1008                 {
1009                         if ( is_entry_subentry( e ) ) {
1010                                 if( sop->oq_search.rs_scope != LDAP_SCOPE_BASE ) {
1011                                         if(!get_subentries_visibility( sop )) {
1012                                                 /* only subentries are visible */
1013                                                 goto loop_continue;
1014                                         }
1015
1016                                 } else if ( get_subentries( sop ) &&
1017                                         !get_subentries_visibility( sop ))
1018                                 {
1019                                         /* only subentries are visible */
1020                                         goto loop_continue;
1021                                 }
1022
1023                         } else if ( get_subentries_visibility( sop )) {
1024                                 /* only subentries are visible */
1025                                 goto loop_continue;
1026                         }
1027                 }
1028 #endif /* BDB_SUBENTRIES */
1029
1030                 /* Does this candidate actually satisfy the search scope?
1031                  *
1032                  * Note that we don't lock access to the bei_parent pointer.
1033                  * Since only leaf nodes can be deleted, the parent of any
1034                  * node will always be a valid node. Also since we have
1035                  * a Read lock on the data, it cannot be renamed out of the
1036                  * scope while we are looking at it, and unless we're using
1037                  * BDB_HIER, its parents cannot be moved either.
1038                  */
1039                 switch( sop->ors_scope ) {
1040                 case LDAP_SCOPE_BASE:
1041                         /* This is always true, yes? */
1042                         if ( id == base.e_id ) scopeok = 1;
1043                         break;
1044
1045                 case LDAP_SCOPE_ONELEVEL:
1046                         if ( ei->bei_parent->bei_id == base.e_id ) scopeok = 1;
1047                         break;
1048
1049                 case LDAP_SCOPE_CHILDREN:
1050                         if ( id == base.e_id ) break;
1051                         /* Fall-thru */
1052                 case LDAP_SCOPE_SUBTREE: {
1053                         EntryInfo *tmp;
1054                         for (tmp = BEI(e); tmp->bei_parent;
1055                                  tmp = tmp->bei_parent ) {
1056                                 if ( tmp->bei_id == base.e_id ) {
1057                                         scopeok = 1;
1058                                         break;
1059                                 }
1060                         }
1061                         } break;
1062                 }
1063
1064 #ifdef BDB_ALIASES
1065                 /* aliases were already dereferenced in candidate list */
1066                 if ( sop->ors_deref & LDAP_DEREF_SEARCHING ) {
1067                         /* but if the search base is an alias, and we didn't
1068                          * deref it when finding, return it.
1069                          */
1070                         if ( is_entry_alias(e) &&
1071                                 ((sop->ors_deref & LDAP_DEREF_FINDING) ||
1072                                         !bvmatch(&e->e_nname, &op->o_req_ndn)))
1073                         {
1074                                 goto loop_continue;
1075                         }
1076
1077                         /* scopes is only non-empty for onelevel or subtree */
1078                         if ( !scopeok && BDB_IDL_N(scopes) ) {
1079                                 unsigned x;
1080                                 if ( sop->ors_scope == LDAP_SCOPE_ONELEVEL ) {
1081                                         x = bdb_idl_search( scopes, e->e_id );
1082                                         if ( scopes[x] == e->e_id ) scopeok = 1;
1083                                 } else {
1084                                         /* subtree, walk up the tree */
1085                                         EntryInfo *tmp = BEI(e);
1086                                         for (;tmp->bei_parent; tmp=tmp->bei_parent) {
1087                                                 x = bdb_idl_search( scopes, tmp->bei_id );
1088                                                 if ( scopes[x] == tmp->bei_id ) {
1089                                                         scopeok = 1;
1090                                                         break;
1091                                                 }
1092                                         }
1093                                 }
1094                         }
1095                 }
1096 #endif
1097
1098                 /* Not in scope, ignore it */
1099                 if ( !scopeok ) {
1100 #ifdef NEW_LOGGING
1101                         LDAP_LOG ( OPERATION, RESULTS,
1102                                 "bdb_search: %ld scope not okay\n",
1103                                 (long) id, 0, 0);
1104 #else
1105                         Debug( LDAP_DEBUG_TRACE,
1106                                 "bdb_search: %ld scope not okay\n",
1107                                 (long) id, 0, 0 );
1108 #endif
1109                         goto loop_continue;
1110                 }
1111
1112                 /*
1113                  * if it's a referral, add it to the list of referrals. only do
1114                  * this for non-base searches, and don't check the filter
1115                  * explicitly here since it's only a candidate anyway.
1116                  */
1117                 if ( !manageDSAit && sop->oq_search.rs_scope != LDAP_SCOPE_BASE
1118                         && is_entry_referral( e ) )
1119                 {
1120                         BerVarray erefs = get_entry_referrals( sop, e );
1121                         rs->sr_ref = referral_rewrite( erefs, &e->e_name, NULL,
1122                                 sop->oq_search.rs_scope == LDAP_SCOPE_ONELEVEL
1123                                         ? LDAP_SCOPE_BASE : LDAP_SCOPE_SUBTREE );
1124
1125                         send_search_reference( sop, rs );
1126
1127                         ber_bvarray_free( rs->sr_ref );
1128                         ber_bvarray_free( erefs );
1129                         rs->sr_ref = NULL;
1130
1131                         goto loop_continue;
1132                 }
1133
1134                 if ( !manageDSAit && is_entry_glue( e )) {
1135                         goto loop_continue;
1136                 }
1137
1138                 /* if it matches the filter and scope, send it */
1139                 if (IS_PSEARCH) {
1140                         if (ps_type != LDAP_PSEARCH_BY_SCOPEOUT) {
1141                                 rs->sr_err = test_filter( sop, rs->sr_entry, &cookief );
1142                         } else {
1143                                 rs->sr_err = LDAP_COMPARE_TRUE;
1144                         }
1145                 } else {
1146                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1147                                 rc_sync = test_filter( sop, rs->sr_entry, &cookief );
1148                                 rs->sr_err = test_filter( sop, rs->sr_entry, &contextcsnand );
1149                                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1150                                         if ( rc_sync == LDAP_COMPARE_TRUE ) {
1151                                                 if ( no_sync_state_change ) {
1152 #ifdef NEW_LOGGING
1153                                                         LDAP_LOG ( OPERATION, RESULTS,
1154                                                                 "bdb_search: error in context csn management\n",
1155                                                                 0, 0, 0 );
1156 #else
1157                                                         Debug( LDAP_DEBUG_TRACE,
1158                                                                 "bdb_search: error in context csn management\n",
1159                                                                 0, 0, 0 );
1160 #endif
1161                                                 }
1162                                                 entry_sync_state = LDAP_SYNC_ADD;
1163                                         } else {
1164                                                 if ( no_sync_state_change ) {
1165                                                         goto loop_continue;
1166                                                 }
1167                                                 entry_sync_state = LDAP_SYNC_PRESENT;
1168                                         }
1169                                 }
1170                         } else {
1171                                 rs->sr_err = test_filter( sop,
1172                                         rs->sr_entry, sop->oq_search.rs_filter );
1173                         }
1174                 }
1175
1176                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1177                         /* check size limit */
1178             if ( --sop->oq_search.rs_slimit == -1 &&
1179                                 sop->o_sync_slog_size == -1 )
1180                         {
1181                                 if (!IS_PSEARCH) {
1182                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
1183                                                 &bdb->bi_cache, e, &lock );
1184                                 }
1185                                 e = NULL;
1186                                 rs->sr_entry = NULL;
1187                                 rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1188                                 rs->sr_ref = rs->sr_v2ref;
1189                                 send_ldap_result( sop, rs );
1190                                 rs->sr_err = LDAP_SUCCESS;
1191                                 goto done;
1192                         }
1193
1194                         if ( get_pagedresults(sop) ) {
1195                                 if ( rs->sr_nentries >= sop->o_pagedresults_size ) {
1196                                         send_pagerequest_response( sop, rs,
1197                                                 lastid, tentries );
1198                                         goto done;
1199                                 }
1200                                 lastid = id;
1201                         }
1202
1203                         if (e) {
1204                                 /* safe default */
1205                                 int result = -1;
1206
1207                                 if (IS_PSEARCH) {
1208                                         int premodify_found = 0;
1209                                         int entry_sync_state;
1210
1211                                         if ( ps_type == LDAP_PSEARCH_BY_ADD ||
1212                                                  ps_type == LDAP_PSEARCH_BY_DELETE ||
1213                                                  ps_type == LDAP_PSEARCH_BY_MODIFY ||
1214                                                  ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1215                                         {
1216                                                 if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1217                                                         struct psid_entry* psid_e;
1218                                                         LDAP_LIST_FOREACH( psid_e,
1219                                                                 &op->o_pm_list, ps_link)
1220                                                         {
1221                                                                 if( psid_e->ps_op == sop ) {
1222                                                                         premodify_found = 1;
1223                                                                         LDAP_LIST_REMOVE(psid_e, ps_link);
1224                                                                         break;
1225                                                                 }
1226                                                         }
1227                                                         if (psid_e != NULL) free (psid_e);
1228                                                 }
1229                                                 if ( ps_type == LDAP_PSEARCH_BY_ADD ) {
1230                                                         entry_sync_state = LDAP_SYNC_ADD;
1231                                                 } else if ( ps_type == LDAP_PSEARCH_BY_DELETE ) {
1232                                                         entry_sync_state = LDAP_SYNC_DELETE;
1233                                                 } else if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1234                                                         if ( premodify_found ) {
1235                                                                 entry_sync_state = LDAP_SYNC_MODIFY;
1236                                                         } else {
1237                                                                 entry_sync_state = LDAP_SYNC_ADD;
1238                                                         }
1239                                                 } else if ( ps_type == LDAP_PSEARCH_BY_SCOPEOUT ) {
1240                                                         entry_sync_state = LDAP_SYNC_DELETE;
1241                                                 } else {
1242                                                         rs->sr_err = LDAP_OTHER;
1243                                                         goto done;
1244                                                 }
1245                                                 if ( sop->o_sync_slog_size != -1 ) {
1246                                                         if ( entry_sync_state == LDAP_SYNC_DELETE ) {
1247                                                                 result = slap_add_session_log( op, sop, e );
1248                                                         } else {
1249                                                                 result = 1;
1250                                                         }
1251                                                 } else {
1252                                                         struct berval cookie;
1253                                                         slap_compose_sync_cookie( sop, &cookie,
1254                                                                 search_context_csn,
1255                                                                 sop->o_sync_state.sid,
1256                                                                 sop->o_sync_state.rid );
1257                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1258                                                                 rs, e, entry_sync_state, ctrls,
1259                                                                 num_ctrls++, 1, &cookie );
1260                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1261                                                         rs->sr_attrs = attrs;
1262                                                         rs->sr_ctrls = ctrls;
1263                                                         result = send_search_entry( sop, rs );
1264                                                         if ( cookie.bv_val ) ch_free( cookie.bv_val );
1265                                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1266                                                                  sop->o_tmpmemctx );
1267                                                         sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1268                                                         ctrls[num_ctrls] = NULL;
1269                                                         rs->sr_ctrls = NULL;
1270                                                 }
1271                                         } else if ( ps_type == LDAP_PSEARCH_BY_PREMODIFY ) {
1272                                                 struct psid_entry* psid_e;
1273                                                 psid_e = (struct psid_entry *) ch_calloc(1,
1274                                                         sizeof(struct psid_entry));
1275                                                 psid_e->ps_op = sop;
1276                                                 LDAP_LIST_INSERT_HEAD( &op->o_pm_list,
1277                                                         psid_e, ps_link );
1278
1279                                         } else {
1280 #ifdef NEW_LOGGING
1281                                                 LDAP_LOG ( OPERATION, RESULTS,
1282                                                         "bdb_search: invalid ps_type (%d) \n",
1283                                                         ps_type, 0, 0);
1284 #else
1285                                                 Debug( LDAP_DEBUG_TRACE,
1286                                                         "bdb_search: invalid ps_type (%d) \n",
1287                                                         ps_type, 0, 0);
1288 #endif
1289                                         }
1290                                 } else {
1291                                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1292                                                 if ( rc_sync == LDAP_COMPARE_TRUE ) { /* ADD */
1293                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1294                                                                 rs, e, entry_sync_state, ctrls,
1295                                                                 num_ctrls++, 0, NULL );
1296                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1297                                                         rs->sr_ctrls = ctrls;
1298                                                         rs->sr_attrs = sop->oq_search.rs_attrs;
1299                                                         result = send_search_entry( sop, rs );
1300                                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1301                                                                  sop->o_tmpmemctx );
1302                                                         sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1303                                                         ctrls[num_ctrls] = NULL;
1304                                                         rs->sr_ctrls = NULL;
1305                                                 } else { /* PRESENT */
1306                                                         if ( sync_send_present_mode ) {
1307                                                                 result = slap_build_syncUUID_set( sop,
1308                                                                         &syncUUID_set, e );
1309                                                                 if ( result <= 0 ) {
1310                                                                         result = -1;
1311                                                                 } else {
1312                                                                         syncUUID_set_cnt++;
1313                                                                         if ( syncUUID_set_cnt ==
1314                                                                                 SLAP_SYNCUUID_SET_SIZE )
1315                                                                         {
1316                                                                                 rs->sr_err = LDAP_SUCCESS;
1317                                                                                 rs->sr_rspoid = LDAP_SYNC_INFO;
1318                                                                                 rs->sr_ctrls = NULL;
1319                                                                                 result = slap_send_syncinfo( sop, rs,
1320                                                                                         LDAP_TAG_SYNC_ID_SET,
1321                                                                                         NULL, 0, syncUUID_set, 0 );
1322                                                                                 if ( result != LDAP_SUCCESS ) {
1323                                                                                         result = -1;
1324                                                                                 }
1325                                                                                 ber_bvarray_free_x( syncUUID_set,
1326                                                                                         sop->o_tmpmemctx );
1327                                                                                 syncUUID_set = NULL;
1328                                                                                 syncUUID_set_cnt = 0;
1329                                                                         }
1330                                                                 }
1331                                                         } else {
1332                                                                 result = 1;
1333                                                         }
1334                                                 }
1335                                         } else {
1336                                                 rs->sr_attrs = sop->oq_search.rs_attrs;
1337                                                 rs->sr_ctrls = NULL;
1338                                                 result = send_search_entry( sop, rs );
1339                                         }
1340                                 }
1341
1342                                 switch (result) {
1343                                 case 0:         /* entry sent ok */
1344                                         break;
1345                                 case 1:         /* entry not sent */
1346                                         break;
1347                                 case -1:        /* connection closed */
1348                                         if (!IS_PSEARCH)
1349                                         bdb_cache_return_entry_r(bdb->bi_dbenv,
1350                                                 &bdb->bi_cache, e, &lock);
1351                                         e = NULL;
1352                                         rs->sr_entry = NULL;
1353                                         rs->sr_err = LDAP_OTHER;
1354                                         goto done;
1355                                 }
1356                         }
1357                 } else {
1358 #ifdef NEW_LOGGING
1359                         LDAP_LOG ( OPERATION, RESULTS,
1360                                 "bdb_search: %ld does not match filter\n", (long) id, 0, 0);
1361 #else
1362                         Debug( LDAP_DEBUG_TRACE,
1363                                 "bdb_search: %ld does not match filter\n",
1364                                 (long) id, 0, 0 );
1365 #endif
1366                 }
1367
1368 loop_continue:
1369                 if( e != NULL ) {
1370                         /* free reader lock */
1371                         if (!IS_PSEARCH) {
1372                                 bdb_cache_return_entry_r( bdb->bi_dbenv,
1373                                         &bdb->bi_cache, e , &lock );
1374                                 if ( sop->o_nocaching ) {
1375                                         bdb_cache_delete_entry( bdb, ei, locker, &lock );
1376                                 }
1377                         }
1378                         e = NULL;
1379                         rs->sr_entry = NULL;
1380                 }
1381
1382                 ldap_pvt_thread_yield();
1383         }
1384
1385         if ( syncUUID_set_cnt > 0 ) {
1386                 rs->sr_err = LDAP_SUCCESS;
1387                 rs->sr_rspoid = LDAP_SYNC_INFO;
1388                 rs->sr_ctrls = NULL;
1389                 slap_send_syncinfo( sop, rs, LDAP_TAG_SYNC_ID_SET,
1390                         NULL, 0, syncUUID_set, 0 );
1391                 ber_bvarray_free_x( syncUUID_set, sop->o_tmpmemctx );
1392                 syncUUID_set_cnt = 0;
1393         }
1394
1395 nochange:
1396         if (!IS_PSEARCH) {
1397                 if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1398                         if ( sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
1399                                 struct berval cookie;
1400                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1401                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1402
1403                                 if ( sync_send_present_mode ) {
1404                                         rs->sr_err = LDAP_SUCCESS;
1405                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1406                                         rs->sr_ctrls = NULL;
1407                                         slap_send_syncinfo( sop, rs,
1408                                                 LDAP_TAG_SYNC_REFRESH_PRESENT, &cookie, 1, NULL, 0 );
1409                                 } else {
1410                                         if ( !no_sync_state_change ) {
1411                                                 int slog_found = 0;
1412                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1413                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1414                                                         o_ps_link )
1415                                                 {
1416                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1417                                                                 if ( ps_list->o_sync_state.sid ==
1418                                                                         sop->o_sync_state.sid ) {
1419                                                                         slog_found = 1;
1420                                                                         break;
1421                                                                 }
1422                                                         }
1423                                                 }
1424
1425                                                 if ( slog_found ) {
1426                                                         rs->sr_err = LDAP_SUCCESS;
1427                                                         rs->sr_rspoid = NULL;
1428                                                         rs->sr_ctrls = NULL;
1429                                                         slap_send_session_log( op, ps_list, rs );
1430                                                 }
1431                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1432                                         }
1433                                         rs->sr_err = LDAP_SUCCESS;
1434                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1435                                         rs->sr_ctrls = NULL;
1436                                         slap_send_syncinfo( sop, rs,
1437                                                 LDAP_TAG_SYNC_REFRESH_DELETE, &cookie, 1, NULL, 0 );
1438                                 }
1439
1440                                 if ( cookie.bv_val ) {
1441                                         ch_free( cookie.bv_val );
1442                                 }
1443                         } else {
1444                                 /* refreshOnly mode */
1445                                 struct berval cookie;
1446                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1447                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1448
1449                                 if ( sync_send_present_mode ) {
1450                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1451                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
1452                                 } else {
1453                                         if ( !no_sync_state_change ) {
1454                                                 int slog_found = 0;
1455                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1456                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1457                                                         o_ps_link )
1458                                                 {
1459                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1460                                                                 if ( ps_list->o_sync_state.sid ==
1461                                                                                 sop->o_sync_state.sid ) {
1462                                                                         slog_found = 1;
1463                                                                         break;
1464                                                                 }
1465                                                         }
1466                                                 }
1467
1468                                                 if ( slog_found ) {
1469                                                         slap_send_session_log( op, ps_list, rs );
1470                                                 }
1471                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1472                                         }
1473                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1474                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_DELETES );
1475                                 }
1476
1477                                 rs->sr_ctrls = ctrls;
1478                                 rs->sr_ref = rs->sr_v2ref;
1479                                 rs->sr_err = (rs->sr_v2ref == NULL)
1480                                         ? LDAP_SUCCESS : LDAP_REFERRAL;
1481                                 rs->sr_rspoid = NULL;
1482                                 send_ldap_result( sop, rs );
1483                                 if ( ctrls[num_ctrls-1]->ldctl_value.bv_val != NULL ) {
1484                                         sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1485                                                 sop->o_tmpmemctx );
1486                                 }
1487                                 sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1488                                 ctrls[num_ctrls] = NULL;
1489                                 if ( cookie.bv_val ) ch_free( cookie.bv_val );
1490                         }
1491                 } else {
1492                         rs->sr_ctrls = NULL;
1493                         rs->sr_ref = rs->sr_v2ref;
1494                         rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1495                         rs->sr_rspoid = NULL;
1496                         send_ldap_result( sop, rs );
1497                 }
1498         }
1499
1500         rs->sr_err = LDAP_SUCCESS;
1501
1502 done:
1503         if( !IS_PSEARCH && e != NULL ) {
1504                 /* free reader lock */
1505                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
1506         }
1507
1508         LOCK_ID_FREE( bdb->bi_dbenv, locker );
1509
1510         ber_bvfree( search_context_csn );
1511
1512         if( rs->sr_v2ref ) {
1513                 ber_bvarray_free( rs->sr_v2ref );
1514                 rs->sr_v2ref = NULL;
1515         }
1516         if( realbase.bv_val ) ch_free( realbase.bv_val );
1517
1518         return rs->sr_err;
1519 }
1520
1521
1522 static int base_candidate(
1523         BackendDB       *be,
1524         Entry   *e,
1525         ID              *ids )
1526 {
1527 #ifdef NEW_LOGGING
1528         LDAP_LOG ( OPERATION, ENTRY,
1529                 "base_candidate: base: \"%s\" (0x%08lx)\n",
1530                 e->e_nname.bv_val, (long) e->e_id, 0);
1531 #else
1532         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
1533                 e->e_nname.bv_val, (long) e->e_id, 0);
1534 #endif
1535
1536         ids[0] = 1;
1537         ids[1] = e->e_id;
1538         return 0;
1539 }
1540
1541 /* Look for "objectClass Present" in this filter.
1542  * Also count depth of filter tree while we're at it.
1543  */
1544 static int oc_filter(
1545         Filter *f,
1546         int cur,
1547         int *max )
1548 {
1549         int rc = 0;
1550
1551         assert( f );
1552
1553         if( cur > *max ) *max = cur;
1554
1555         switch( f->f_choice ) {
1556         case LDAP_FILTER_PRESENT:
1557                 if (f->f_desc == slap_schema.si_ad_objectClass) {
1558                         rc = 1;
1559                 }
1560                 break;
1561
1562         case LDAP_FILTER_AND:
1563         case LDAP_FILTER_OR:
1564                 cur++;
1565                 for ( f=f->f_and; f; f=f->f_next ) {
1566                         (void) oc_filter(f, cur, max);
1567                 }
1568                 break;
1569
1570         default:
1571                 break;
1572         }
1573         return rc;
1574 }
1575
1576 static void search_stack_free( void *key, void *data )
1577 {
1578         ber_memfree_x(data, NULL);
1579 }
1580
1581 static void *search_stack( Operation *op )
1582 {
1583         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1584         void *ret = NULL;
1585
1586         if ( op->o_threadctx ) {
1587                 ldap_pvt_thread_pool_getkey( op->o_threadctx, search_stack,
1588                         &ret, NULL );
1589         } else {
1590                 ret = bdb->bi_search_stack;
1591         }
1592
1593         if ( !ret ) {
1594                 ret = ch_malloc( bdb->bi_search_stack_depth * BDB_IDL_UM_SIZE
1595                         * sizeof( ID ) );
1596                 if ( op->o_threadctx ) {
1597                         ldap_pvt_thread_pool_setkey( op->o_threadctx, search_stack,
1598                                 ret, search_stack_free );
1599                 } else {
1600                         bdb->bi_search_stack = ret;
1601                 }
1602         }
1603         return ret;
1604 }
1605
1606 static int search_candidates(
1607         Operation *stackop,
1608         Operation *op,
1609         SlapReply *rs,
1610         Entry *e,
1611         u_int32_t locker,
1612         ID      *ids,
1613         ID      *scopes )
1614 {
1615         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1616         int rc, depth = 1;
1617         Filter          f, rf, xf, nf;
1618         ID              *stack;
1619         AttributeAssertion aa_ref;
1620 #ifdef BDB_SUBENTRIES
1621         Filter  sf;
1622         AttributeAssertion aa_subentry;
1623 #endif
1624
1625         /*
1626          * This routine takes as input a filter (user-filter)
1627          * and rewrites it as follows:
1628          *      (&(scope=DN)[(objectClass=subentry)]
1629          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
1630          */
1631
1632 #ifdef NEW_LOGGING
1633         LDAP_LOG ( OPERATION, ENTRY,
1634                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1635                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope);
1636 #else
1637         Debug(LDAP_DEBUG_TRACE,
1638                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1639                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope );
1640 #endif
1641
1642         xf.f_or = op->oq_search.rs_filter;
1643         xf.f_choice = LDAP_FILTER_OR;
1644         xf.f_next = NULL;
1645
1646         /* If the user's filter uses objectClass=*,
1647          * these clauses are redundant.
1648          */
1649         if (!oc_filter(op->oq_search.rs_filter, 1, &depth)
1650                 && !get_subentries_visibility(op)
1651                 && !is_sync_protocol(op) )
1652         {
1653                 if( !get_manageDSAit(op) && !get_domainScope(op) ) {
1654                         /* match referral objects */
1655                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1656                         rf.f_choice = LDAP_FILTER_EQUALITY;
1657                         rf.f_ava = &aa_ref;
1658                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1659                         rf.f_av_value = bv_ref;
1660                         rf.f_next = xf.f_or;
1661                         xf.f_or = &rf;
1662                         depth++;
1663                 }
1664         }
1665
1666         f.f_next = NULL;
1667         f.f_choice = LDAP_FILTER_AND;
1668         f.f_and = &nf;
1669         /* Dummy; we compute scope separately now */
1670         nf.f_choice = SLAPD_FILTER_COMPUTED;
1671         nf.f_result = LDAP_SUCCESS;
1672         nf.f_next = ( xf.f_or == op->oq_search.rs_filter )
1673                 ? op->oq_search.rs_filter : &xf ;
1674         /* Filter depth increased again, adding dummy clause */
1675         depth++;
1676
1677 #ifdef BDB_SUBENTRIES
1678         if( get_subentries_visibility( op ) ) {
1679                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1680                 sf.f_choice = LDAP_FILTER_EQUALITY;
1681                 sf.f_ava = &aa_subentry;
1682                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1683                 sf.f_av_value = bv_subentry;
1684                 sf.f_next = nf.f_next;
1685                 nf.f_next = &sf;
1686         }
1687 #endif
1688
1689         /* Allocate IDL stack, plus 1 more for former tmp */
1690         if ( depth+1 > bdb->bi_search_stack_depth ) {
1691                 stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1692         } else {
1693                 stack = search_stack( stackop );
1694         }
1695
1696         if( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1697                 rc = search_aliases( op, rs, e, locker, ids, scopes, stack );
1698         } else {
1699                 rc = bdb_dn2idl( op, e, ids, stack );
1700         }
1701
1702         if ( rc == LDAP_SUCCESS ) {
1703                 rc = bdb_filter_candidates( op, &f, ids,
1704                         stack, stack+BDB_IDL_UM_SIZE );
1705         }
1706
1707         if ( depth+1 > bdb->bi_search_stack_depth ) {
1708                 ch_free( stack );
1709         }
1710
1711         if( rc ) {
1712 #ifdef NEW_LOGGING
1713                 LDAP_LOG ( OPERATION, DETAIL1,
1714                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1715 #else
1716                 Debug(LDAP_DEBUG_TRACE,
1717                         "bdb_search_candidates: failed (rc=%d)\n",
1718                         rc, NULL, NULL );
1719 #endif
1720
1721         } else {
1722 #ifdef NEW_LOGGING
1723                 LDAP_LOG ( OPERATION, DETAIL1,
1724                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1725                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1726                         (long) BDB_IDL_LAST(ids));
1727 #else
1728                 Debug(LDAP_DEBUG_TRACE,
1729                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1730                         (long) ids[0],
1731                         (long) BDB_IDL_FIRST(ids),
1732                         (long) BDB_IDL_LAST(ids) );
1733 #endif
1734         }
1735
1736         return rc;
1737 }
1738
1739 static void
1740 send_pagerequest_response(
1741         Operation       *op,
1742         SlapReply       *rs,
1743         ID              lastid,
1744         int             tentries )
1745 {
1746         LDAPControl     ctrl, *ctrls[2];
1747         BerElementBuffer berbuf;
1748         BerElement      *ber = (BerElement *)&berbuf;
1749         struct berval   cookie = { 0, NULL };
1750         PagedResultsCookie respcookie;
1751
1752 #ifdef NEW_LOGGING
1753         LDAP_LOG ( OPERATION, ENTRY,
1754                 "send_pagerequest_response: lastid: (0x%08lx) "
1755                 "nentries: (0x%081x)\n",
1756                 lastid, rs->sr_nentries, NULL );
1757 #else
1758         Debug(LDAP_DEBUG_ARGS, "send_pagerequest_response: lastid: (0x%08lx) "
1759                 "nentries: (0x%081x)\n", lastid, rs->sr_nentries, NULL );
1760 #endif
1761
1762         ctrl.ldctl_value.bv_val = NULL;
1763         ctrls[0] = &ctrl;
1764         ctrls[1] = NULL;
1765
1766         ber_init2( ber, NULL, LBER_USE_DER );
1767
1768         respcookie = ( PagedResultsCookie )lastid;
1769         op->o_conn->c_pagedresults_state.ps_cookie = respcookie;
1770         cookie.bv_len = sizeof( respcookie );
1771         cookie.bv_val = (char *)&respcookie;
1772
1773         /*
1774          * FIXME: we should consider sending an estimate of the entries
1775          * left, after appropriate security check is done
1776          */
1777         ber_printf( ber, "{iO}", tentries, &cookie );
1778
1779         if ( ber_flatten2( ber, &ctrls[0]->ldctl_value, 0 ) == -1 ) {
1780                 goto done;
1781         }
1782
1783         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1784         ctrls[0]->ldctl_iscritical = 0;
1785
1786         rs->sr_ctrls = ctrls;
1787         rs->sr_err = LDAP_SUCCESS;
1788         send_ldap_result( op, rs );
1789
1790 done:
1791         (void) ber_free_buf( ber );
1792 }