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_paged_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                         slap_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                         slap_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 int bdb_psearch( Operation *op, SlapReply *rs, Operation *sop,
 365         Entry *ps_e, int ps_type )
 366 {
 367         sop->o_private = op->o_private;
 368         bdb_do_search( op, rs, sop, ps_e, ps_type );
 369         sop->o_private = NULL;
 370 }
 371
 372 /* For persistent searches, op is the currently executing operation,
 373  * sop is the persistent search. For regular searches, sop = op.
 374  */
 375 int
 376 bdb_do_search( Operation *op, SlapReply *rs, Operation *sop,
 377         Entry *ps_e, int ps_type )
 378 {
 379         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 380         time_t          stoptime;
 381         ID              id, cursor;
 382         ID              candidates[BDB_IDL_UM_SIZE];
 383         ID              scopes[BDB_IDL_DB_SIZE];
 384         Entry           *e = NULL, base, e_root = {0};
 385         Entry           *matched = NULL;
 386         EntryInfo       *ei, ei_root = {0};
 387         struct berval   realbase = BER_BVNULL;
 388         int             manageDSAit;
 389         int             tentries = 0;
 390         ID              lastid = NOID;
 391         AttributeName   *attrs;
 392
 393         Filter          contextcsnand, contextcsnle, cookief, csnfnot,
 394                         csnfeq, csnfand, csnfge;
 395         AttributeAssertion aa_ge, aa_eq, aa_le;
 396         struct berval   *search_context_csn = NULL;
 397         DB_LOCK         ctxcsn_lock;
 398         LDAPControl     *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
 399         int             num_ctrls = 0;
 400         AttributeName   uuid_attr[2];
 401         int             rc_sync = 0;
 402         int             entry_sync_state = -1;
 403         AttributeName   null_attr;
 404         int             no_sync_state_change = 0;
 405
 406         u_int32_t       locker = 0;
 407         DB_LOCK         lock;
 408
 409         Operation       *ps_list;
 410         int                     sync_send_present_mode = 1;
 411         int                     match;
 412         MatchingRule *mr;
 413         const char *text;
 414         int                     slog_found = 0;
 415
 416         BerVarray       syncUUID_set = NULL;
 417         int                     syncUUID_set_cnt = 0;
 418
 419 #ifdef NEW_LOGGING
 420         LDAP_LOG( OPERATION, ENTRY, "bdb_search\n", 0, 0, 0 );
 421 #else
 422         Debug( LDAP_DEBUG_TRACE, "=> bdb_search\n",
 423                 0, 0, 0);
 424 #endif
 425         attrs = sop->oq_search.rs_attrs;
 426
 427         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST ) {
 428                 struct slap_session_entry *sent;
 429                 if ( sop->o_sync_state.sid >= 0 ) {
 430                         LDAP_LIST_FOREACH( sent, &bdb->bi_session_list, se_link ) {
 431                                 if ( sent->se_id == sop->o_sync_state.sid ) {
 432                                         sop->o_sync_slog_size = sent->se_size;
 433                                         break;
 434                                 }
 435                         }
 436                 }
 437         }
 438
 439         /* psearch needs to be registered before refresh begins */
 440         /* psearch and refresh transmission is serialized in send_ldap_ber() */
 441         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
 442                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 443                 LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 444                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 445
 446         } else if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST
 447                 && sop->o_sync_slog_size >= 0 )
 448         {
 449                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 450                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 451                         if ( ps_list->o_sync_slog_size >= 0 ) {
 452                                 if ( ps_list->o_sync_state.sid == sop->o_sync_state.sid ) {
 453                                         slog_found = 1;
 454                                         break;
 455                                 }
 456                         }
 457                 }
 458
 459                 if ( slog_found ) {
 460                         if ( ps_list->o_sync_slog_omitcsn.bv_len != 0 ) {
 461                                 mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 462                                 if ( sop->o_sync_state.ctxcsn &&
 463                                         sop->o_sync_state.ctxcsn->bv_val != NULL )
 464                                 {
 465                                         value_match( &match, slap_schema.si_ad_entryCSN, mr,
 466                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 467                                                 sop->o_sync_state.ctxcsn,
 468                                                 &ps_list->o_sync_slog_omitcsn,
 469                                                 &text );
 470                                 } else {
 471                                         match = -1;
 472                                 }
 473                                 if ( match >= 0 ) {
 474                                         sync_send_present_mode = 0;
 475                                 }
 476                         } else {
 477                                 sync_send_present_mode = 0;
 478                         }
 479                 } else if ( sop->o_sync_slog_size >= 0 ) {
 480                         LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 481                 } else {
 482                         sop->o_sync_state.sid = -1;
 483                 }
 484                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 485         }
 486
 487         null_attr.an_desc = NULL;
 488         null_attr.an_oc = NULL;
 489         null_attr.an_oc_exclude = 0;
 490         null_attr.an_name.bv_len = 0;
 491         null_attr.an_name.bv_val = NULL;
 492
 493         for( num_ctrls = 0; num_ctrls < SLAP_MAX_RESPONSE_CONTROLS; num_ctrls++ ) {
 494                 ctrls[num_ctrls] = NULL;
 495         }
 496         num_ctrls = 0;
 497
 498         if ( IS_PSEARCH && IS_BDB_REPLACE(ps_type)) {
 499                 attrs = uuid_attr;
 500                 attrs[0].an_desc = NULL;
 501                 attrs[0].an_oc = NULL;
 502                 attrs[0].an_oc_exclude = 0;
 503                 attrs[0].an_name.bv_len = 0;
 504                 attrs[0].an_name.bv_val = NULL;
 505         }
 506
 507         manageDSAit = get_manageDSAit( sop );
 508
 509         /* Sync control overrides manageDSAit */
 510         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
 511                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 512                         manageDSAit = SLAP_CRITICAL_CONTROL;
 513                 }
 514         } else if ( IS_PSEARCH ) {
 515                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 516                         manageDSAit = SLAP_CRITICAL_CONTROL;
 517                 }
 518         }
 519
 520         rs->sr_err = LOCK_ID( bdb->bi_dbenv, &locker );
 521
 522         switch(rs->sr_err) {
 523         case 0:
 524                 break;
 525         default:
 526                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 527                 return rs->sr_err;
 528         }
 529
 530         if ( sop->o_req_ndn.bv_len == 0 ) {
 531                 /* DIT root special case */
 532                 ei_root.bei_e = &e_root;
 533                 ei_root.bei_parent = &ei_root;
 534                 e_root.e_private = &ei_root;
 535                 e_root.e_id = 0;
 536                 e_root.e_nname.bv_val="";
 537                 e_root.e_name.bv_val="";
 538                 ei = &ei_root;
 539                 rs->sr_err = LDAP_SUCCESS;
 540         } else {
 541 dn2entry_retry:
 542                 /* get entry with reader lock */
 543                 rs->sr_err = bdb_dn2entry( op, NULL, &sop->o_req_ndn, &ei,
 544                         1, locker, &lock );
 545         }
 546
 547         switch(rs->sr_err) {
 548         case DB_NOTFOUND:
 549                 matched = ei->bei_e;
 550                 break;
 551         case 0:
 552                 e = ei->bei_e;
 553                 break;
 554         case LDAP_BUSY:
 555                 send_ldap_error( sop, rs, LDAP_BUSY, "ldap server busy" );
 556                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 557                 return LDAP_BUSY;
 558         case DB_LOCK_DEADLOCK:
 559         case DB_LOCK_NOTGRANTED:
 560                 goto dn2entry_retry;
 561         default:
 562                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 563                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 564                 return rs->sr_err;
 565         }
 566
 567         if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
 568                 BDB_IDL_ZERO(candidates);
 569                 e = deref_base( op, rs, e, &matched, locker, &lock,
 570                         candidates, NULL );
 571         }
 572
 573         if ( e == NULL ) {
 574                 struct berval matched_dn = BER_BVNULL;
 575
 576                 if ( matched != NULL ) {
 577                         BerVarray erefs;
 578                         ber_dupbv( &matched_dn, &matched->e_name );
 579
 580                         erefs = is_entry_referral( matched )
 581                                 ? get_entry_referrals( op, matched )
 582                                 : NULL;
 583
 584                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 585                                 matched, &lock);
 586                         matched = NULL;
 587
 588                         if( erefs ) {
 589                                 rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 590                                         &sop->o_req_dn, sop->oq_search.rs_scope );
 591                                 ber_bvarray_free( erefs );
 592                         }
 593
 594                 } else {
 595                         rs->sr_ref = referral_rewrite( default_referral,
 596                                 NULL, &sop->o_req_dn, sop->oq_search.rs_scope );
 597                 }
 598
 599                 rs->sr_err = LDAP_REFERRAL;
 600                 rs->sr_matched = matched_dn.bv_val;
 601                 send_ldap_result( sop, rs );
 602
 603                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 604                 if ( rs->sr_ref ) {
 605                         ber_bvarray_free( rs->sr_ref );
 606                         rs->sr_ref = NULL;
 607                 }
 608                 if ( matched_dn.bv_val ) {
 609                         ber_memfree( matched_dn.bv_val );
 610                         rs->sr_matched = NULL;
 611                 }
 612                 return rs->sr_err;
 613         }
 614
 615         if ( !manageDSAit && e != &e_root && is_entry_referral( e ) ) {
 616                 /* entry is a referral, don't allow add */
 617                 struct berval matched_dn;
 618                 BerVarray erefs;
 619
 620                 ber_dupbv( &matched_dn, &e->e_name );
 621                 erefs = get_entry_referrals( op, e );
 622
 623                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 624                 e = NULL;
 625
 626                 if( erefs ) {
 627                         rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 628                                 &sop->o_req_dn, sop->oq_search.rs_scope );
 629                         ber_bvarray_free( erefs );
 630                 }
 631
 632 #ifdef NEW_LOGGING
 633                 LDAP_LOG ( OPERATION, RESULTS,
 634                         "bdb_search: entry is referral\n", 0, 0, 0 );
 635 #else
 636                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 637                         0, 0, 0 );
 638 #endif
 639
 640                 if (!rs->sr_ref) rs->sr_text = "bad_referral object";
 641                 rs->sr_err = LDAP_REFERRAL;
 642                 rs->sr_matched = matched_dn.bv_val;
 643                 send_ldap_result( sop, rs );
 644
 645                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 646                 ber_bvarray_free( rs->sr_ref );
 647                 rs->sr_ref = NULL;
 648                 ber_memfree( matched_dn.bv_val );
 649                 rs->sr_matched = NULL;
 650                 return 1;
 651         }
 652
 653         if ( get_assert( op ) &&
 654                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 655         {
 656                 rs->sr_err = LDAP_ASSERTION_FAILED;
 657                 send_ldap_result( sop, rs );
 658                 return 1;
 659         }
 660
 661         /* compute it anyway; root does not use it */
 662         stoptime = op->o_time + sop->ors_tlimit;
 663
 664         /* need normalized dn below */
 665         ber_dupbv( &realbase, &e->e_nname );
 666
 667         /* Copy info to base, must free entry before accessing the database
 668          * in search_candidates, to avoid deadlocks.
 669          */
 670         base.e_private = e->e_private;
 671         base.e_nname = realbase;
 672         base.e_id = e->e_id;
 673
 674         if ( e != &e_root ) {
 675                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 676         }
 677         e = NULL;
 678
 679         if ( !IS_PSEARCH ) {
 680                 rs->sr_err = bdb_get_commit_csn( sop, rs, &search_context_csn,
 681                         locker, &ctxcsn_lock );
 682
 683                 if ( rs->sr_err != LDAP_SUCCESS ) {
 684                         send_ldap_error( sop, rs, rs->sr_err,
 685                                 "error in csn management in search" );
 686                         goto done;
 687                 }
 688
 689                 if ( sop->o_sync_mode != SLAP_SYNC_NONE &&
 690                         sop->o_sync_state.ctxcsn &&
 691                         sop->o_sync_state.ctxcsn->bv_val &&
 692                         ber_bvcmp( &sop->o_sync_state.ctxcsn[0], search_context_csn ) == 0 )
 693                 {
 694                         bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 695                         goto nochange;
 696                 }
 697         } else {
 698                 search_context_csn = ber_dupbv( NULL, &op->o_sync_csn );
 699         }
 700
 701         /* select candidates */
 702         if ( sop->oq_search.rs_scope == LDAP_SCOPE_BASE ) {
 703                 rs->sr_err = base_candidate( op->o_bd, &base, candidates );
 704
 705         } else {
 706                 BDB_IDL_ZERO( candidates );
 707                 BDB_IDL_ZERO( scopes );
 708                 rs->sr_err = search_candidates( op, sop, rs, &base,
 709                         locker, candidates, scopes );
 710         }
 711
 712         if ( !IS_PSEARCH && sop->o_sync_mode != SLAP_SYNC_NONE ) {
 713                 bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 714         }
 715
 716         /* start cursor at beginning of candidates.
 717          */
 718         cursor = 0;
 719         if (IS_PSEARCH) {
 720                 if ( !BDB_IDL_IS_RANGE( candidates ) ) {
 721                         cursor = bdb_idl_search( candidates, ps_e->e_id );
 722                         if ( candidates[cursor] != ps_e->e_id ) {
 723                                 rs->sr_err = LDAP_SUCCESS;
 724                                 goto done;
 725                         }
 726                 } else if ( ps_e->e_id < BDB_IDL_RANGE_FIRST( candidates ) ||
 727                         ps_e->e_id > BDB_IDL_RANGE_LAST( candidates ))
 728                 {
 729                         rs->sr_err = LDAP_SUCCESS;
 730                         goto done;
 731                 }
 732                 candidates[0] = 1;
 733                 candidates[1] = ps_e->e_id;
 734         }
 735
 736         if ( candidates[0] == 0 ) {
 737 #ifdef NEW_LOGGING
 738                 LDAP_LOG ( OPERATION, RESULTS,
 739                         "bdb_search: no candidates\n", 0, 0, 0 );
 740 #else
 741                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 742                         0, 0, 0 );
 743 #endif
 744
 745                 goto nochange;
 746         }
 747
 748         /* if not root and candidates exceed to-be-checked entries, abort */
 749         if ( sop->ors_limit     /* isroot == TRUE */ &&
 750                 sop->ors_limit->lms_s_unchecked != -1 &&
 751                 BDB_IDL_N(candidates) > (unsigned) sop->ors_limit->lms_s_unchecked )
 752         {
 753                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 754                 send_ldap_result( sop, rs );
 755                 rs->sr_err = LDAP_SUCCESS;
 756                 goto done;
 757         }
 758
 759         if ( sop->ors_limit == NULL     /* isroot == FALSE */ ||
 760                 !sop->ors_limit->lms_s_pr_hide )
 761         {
 762                 tentries = BDB_IDL_N(candidates);
 763         }
 764
 765         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
 766                 if ( (ID)( sop->o_pagedresults_state.ps_cookie ) == 0 ) {
 767                         id = bdb_idl_first( candidates, &cursor );
 768
 769                 } else {
 770                         if ( sop->o_pagedresults_size == 0 ) {
 771                                 rs->sr_err = LDAP_SUCCESS;
 772                                 rs->sr_text = "search abandoned by pagedResult size=0";
 773                                 send_ldap_result( sop, rs );
 774                                 goto done;
 775                         }
 776                         for ( id = bdb_idl_first( candidates, &cursor );
 777                                 id != NOID &&
 778                                         id <= (ID)( sop->o_pagedresults_state.ps_cookie );
 779                                 id = bdb_idl_next( candidates, &cursor ) )
 780                         {
 781                                 /* empty */;
 782                         }
 783                 }
 784
 785                 if ( cursor == NOID ) {
 786 #ifdef NEW_LOGGING
 787                         LDAP_LOG ( OPERATION, RESULTS,
 788                                 "bdb_search: no paged results candidates\n",
 789                                 0, 0, 0 );
 790 #else
 791                         Debug( LDAP_DEBUG_TRACE,
 792                                 "bdb_search: no paged results candidates\n",
 793                                 0, 0, 0 );
 794 #endif
 795                         send_paged_response( sop, rs, &lastid, 0 );
 796
 797                         rs->sr_err = LDAP_OTHER;
 798                         goto done;
 799                 }
 800                 goto loop_begin;
 801         }
 802
 803         if (( sop->o_sync_mode & SLAP_SYNC_REFRESH ) || IS_PSEARCH ) {
 804                 int match;
 805
 806                 cookief.f_choice = LDAP_FILTER_AND;
 807                 cookief.f_and = &csnfnot;
 808                 cookief.f_next = NULL;
 809
 810                 csnfnot.f_choice = LDAP_FILTER_NOT;
 811                 csnfnot.f_not = &csnfeq;
 812                 csnfnot.f_next = &csnfand;
 813
 814                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 815                 csnfeq.f_ava = &aa_eq;
 816                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 817                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 818                         csnfeq.f_av_value = *sop->o_sync_state.ctxcsn;
 819                 } else {
 820                         csnfeq.f_av_value = slap_empty_bv;
 821                 }
 822
 823                 csnfand.f_choice = LDAP_FILTER_AND;
 824                 csnfand.f_and = &csnfge;
 825                 csnfand.f_next = NULL;
 826
 827                 csnfge.f_choice = LDAP_FILTER_GE;
 828                 csnfge.f_ava = &aa_ge;
 829                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 830                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 831                         csnfge.f_av_value = *sop->o_sync_state.ctxcsn;
 832                 } else {
 833                         csnfge.f_av_value = slap_empty_bv;
 834                 }
 835
 836                 if ( search_context_csn && !IS_PSEARCH ) {
 837                         csnfge.f_next = &contextcsnand;
 838
 839                         contextcsnand.f_choice = LDAP_FILTER_AND;
 840                         contextcsnand.f_and = &contextcsnle;
 841                         contextcsnand.f_next = NULL;
 842
 843                         contextcsnle.f_choice = LDAP_FILTER_LE;
 844                         contextcsnle.f_ava = &aa_le;
 845                         contextcsnle.f_av_desc = slap_schema.si_ad_entryCSN;
 846                         contextcsnle.f_av_value = *search_context_csn;
 847                         contextcsnle.f_next = sop->oq_search.rs_filter;
 848
 849                         mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 850                         if ( sop->o_sync_state.ctxcsn &&
 851                                 sop->o_sync_state.ctxcsn->bv_val != NULL )
 852                         {
 853                                 value_match( &match, slap_schema.si_ad_entryCSN, mr,
 854                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 855                                                 &sop->o_sync_state.ctxcsn[0], search_context_csn,
 856                                                 &text );
 857                         } else {
 858                                 match = -1;
 859                         }
 860                         no_sync_state_change = ( match >= 0 );
 861                 } else {
 862                         csnfge.f_next = sop->oq_search.rs_filter;
 863                 }
 864         }
 865
 866         for ( id = bdb_idl_first( candidates, &cursor );
 867                 id != NOID && !no_sync_state_change;
 868                 id = bdb_idl_next( candidates, &cursor ) )
 869         {
 870                 int scopeok = 0;
 871
 872 loop_begin:
 873                 /* check for abandon */
 874                 if ( sop->o_abandon ) {
 875                         if ( sop != op ) {
 876                                 bdb_drop_psearch( sop, sop->o_msgid );
 877                         }
 878                         rs->sr_err = LDAP_SUCCESS;
 879                         goto done;
 880                 }
 881
 882                 if ( sop->o_cancel ) {
 883                         assert( sop->o_cancel == SLAP_CANCEL_REQ );
 884                         rs->sr_err = LDAP_CANCELLED;
 885                         send_ldap_result( sop, rs );
 886                         sop->o_cancel = SLAP_CANCEL_ACK;
 887                         rs->sr_err = LDAP_SUCCESS;
 888                         goto done;
 889                 }
 890
 891                 /* check time limit */
 892                 if ( sop->ors_tlimit != SLAP_NO_LIMIT
 893                                 && slap_get_time() > stoptime )
 894                 {
 895                         rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 896                         rs->sr_ref = rs->sr_v2ref;
 897                         send_ldap_result( sop, rs );
 898                         rs->sr_err = LDAP_SUCCESS;
 899                         goto done;
 900                 }
 901
 902                 if (!IS_PSEARCH) {
 903 id2entry_retry:
 904                         /* get the entry with reader lock */
 905                         ei = NULL;
 906                         rs->sr_err = bdb_cache_find_id( op, NULL,
 907                                 id, &ei, 0, locker, &lock );
 908
 909                         if (rs->sr_err == LDAP_BUSY) {
 910                                 rs->sr_text = "ldap server busy";
 911                                 send_ldap_result( sop, rs );
 912                                 goto done;
 913
 914                         } else if ( rs->sr_err == DB_LOCK_DEADLOCK
 915                                 || rs->sr_err == DB_LOCK_NOTGRANTED )
 916                         {
 917                                 goto id2entry_retry;
 918                         }
 919
 920                         if ( ei && rs->sr_err == LDAP_SUCCESS ) {
 921                                 e = ei->bei_e;
 922                         } else {
 923                                 e = NULL;
 924                         }
 925
 926                         if ( e == NULL ) {
 927                                 if( !BDB_IDL_IS_RANGE(candidates) ) {
 928                                         /* only complain for non-range IDLs */
 929 #ifdef NEW_LOGGING
 930                                         LDAP_LOG ( OPERATION, RESULTS,
 931                                                 "bdb_search: candidate %ld not found\n",
 932                                                 (long) id, 0, 0);
 933 #else
 934                                         Debug( LDAP_DEBUG_TRACE,
 935                                                 "bdb_search: candidate %ld not found\n",
 936                                                 (long) id, 0, 0 );
 937 #endif
 938                                 }
 939
 940                                 goto loop_continue;
 941                         }
 942                 } else {
 943                         e = ps_e;
 944                 }
 945
 946                 rs->sr_entry = e;
 947
 948 #ifdef BDB_SUBENTRIES
 949                 /* FIXME: send all but syncrepl */
 950 #if 0
 951                 if ( !is_sync_protocol( sop ) )
 952 #endif
 953                 {
 954                         if ( is_entry_subentry( e ) ) {
 955                                 if( sop->oq_search.rs_scope != LDAP_SCOPE_BASE ) {
 956                                         if(!get_subentries_visibility( sop )) {
 957                                                 /* only subentries are visible */
 958                                                 goto loop_continue;
 959                                         }
 960
 961                                 } else if ( get_subentries( sop ) &&
 962                                         !get_subentries_visibility( sop ))
 963                                 {
 964                                         /* only subentries are visible */
 965                                         goto loop_continue;
 966                                 }
 967
 968                         } else if ( get_subentries_visibility( sop )) {
 969                                 /* only subentries are visible */
 970                                 goto loop_continue;
 971                         }
 972                 }
 973 #endif /* BDB_SUBENTRIES */
 974
 975                 /* Does this candidate actually satisfy the search scope?
 976                  *
 977                  * Note that we don't lock access to the bei_parent pointer.
 978                  * Since only leaf nodes can be deleted, the parent of any
 979                  * node will always be a valid node. Also since we have
 980                  * a Read lock on the data, it cannot be renamed out of the
 981                  * scope while we are looking at it, and unless we're using
 982                  * BDB_HIER, its parents cannot be moved either.
 983                  */
 984                 switch( sop->ors_scope ) {
 985                 case LDAP_SCOPE_BASE:
 986                         /* This is always true, yes? */
 987                         if ( id == base.e_id ) scopeok = 1;
 988                         break;
 989
 990                 case LDAP_SCOPE_ONELEVEL:
 991                         if ( ei->bei_parent->bei_id == base.e_id ) scopeok = 1;
 992                         break;
 993
 994 #ifdef LDAP_SCOPE_CHILDREN
 995                 case LDAP_SCOPE_CHILDREN:
 996                         if ( id == base.e_id ) break;
 997                         /* Fall-thru */
 998 #endif
 999                 case LDAP_SCOPE_SUBTREE: {
1000                         EntryInfo *tmp;
1001                         for (tmp = BEI(e); tmp;
1002                                  tmp = tmp->bei_parent ) {
1003                                 if ( tmp->bei_id == base.e_id ) {
1004                                         scopeok = 1;
1005                                         break;
1006                                 }
1007                         }
1008                         } break;
1009                 }
1010
1011 #ifdef BDB_ALIASES
1012                 /* aliases were already dereferenced in candidate list */
1013                 if ( sop->ors_deref & LDAP_DEREF_SEARCHING ) {
1014                         /* but if the search base is an alias, and we didn't
1015                          * deref it when finding, return it.
1016                          */
1017                         if ( is_entry_alias(e) &&
1018                                 ((sop->ors_deref & LDAP_DEREF_FINDING) ||
1019                                         !bvmatch(&e->e_nname, &op->o_req_ndn)))
1020                         {
1021                                 goto loop_continue;
1022                         }
1023
1024                         /* scopes is only non-empty for onelevel or subtree */
1025                         if ( !scopeok && BDB_IDL_N(scopes) ) {
1026                                 unsigned x;
1027                                 if ( sop->ors_scope == LDAP_SCOPE_ONELEVEL ) {
1028                                         x = bdb_idl_search( scopes, e->e_id );
1029                                         if ( scopes[x] == e->e_id ) scopeok = 1;
1030                                 } else {
1031                                         /* subtree, walk up the tree */
1032                                         EntryInfo *tmp = BEI(e);
1033                                         for (;tmp->bei_parent; tmp=tmp->bei_parent) {
1034                                                 x = bdb_idl_search( scopes, tmp->bei_id );
1035                                                 if ( scopes[x] == tmp->bei_id ) {
1036                                                         scopeok = 1;
1037                                                         break;
1038                                                 }
1039                                         }
1040                                 }
1041                         }
1042                 }
1043 #endif
1044
1045                 /* Not in scope, ignore it */
1046                 if ( !scopeok ) {
1047 #ifdef NEW_LOGGING
1048                         LDAP_LOG ( OPERATION, RESULTS,
1049                                 "bdb_search: %ld scope not okay\n",
1050                                 (long) id, 0, 0);
1051 #else
1052                         Debug( LDAP_DEBUG_TRACE,
1053                                 "bdb_search: %ld scope not okay\n",
1054                                 (long) id, 0, 0 );
1055 #endif
1056                         goto loop_continue;
1057                 }
1058
1059                 /*
1060                  * if it's a referral, add it to the list of referrals. only do
1061                  * this for non-base searches, and don't check the filter
1062                  * explicitly here since it's only a candidate anyway.
1063                  */
1064                 if ( !manageDSAit && sop->oq_search.rs_scope != LDAP_SCOPE_BASE
1065                         && is_entry_referral( e ) )
1066                 {
1067                         BerVarray erefs = get_entry_referrals( sop, e );
1068                         rs->sr_ref = referral_rewrite( erefs, &e->e_name, NULL,
1069                                 sop->oq_search.rs_scope == LDAP_SCOPE_ONELEVEL
1070                                         ? LDAP_SCOPE_BASE : LDAP_SCOPE_SUBTREE );
1071
1072                         send_search_reference( sop, rs );
1073
1074                         ber_bvarray_free( rs->sr_ref );
1075                         ber_bvarray_free( erefs );
1076                         rs->sr_ref = NULL;
1077
1078                         goto loop_continue;
1079                 }
1080
1081                 if ( !manageDSAit && is_entry_glue( e )) {
1082                         goto loop_continue;
1083                 }
1084
1085                 /* if it matches the filter and scope, send it */
1086                 if (IS_PSEARCH) {
1087                         if (ps_type != LDAP_PSEARCH_BY_SCOPEOUT) {
1088                                 rs->sr_err = test_filter( sop, rs->sr_entry, &cookief );
1089                         } else {
1090                                 rs->sr_err = LDAP_COMPARE_TRUE;
1091                         }
1092
1093                 } else {
1094                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1095                                 rc_sync = test_filter( sop, rs->sr_entry, &cookief );
1096                                 rs->sr_err = test_filter( sop, rs->sr_entry, &contextcsnand );
1097                                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1098                                         if ( rc_sync == LDAP_COMPARE_TRUE ) {
1099                                                 if ( no_sync_state_change ) {
1100 #ifdef NEW_LOGGING
1101                                                         LDAP_LOG ( OPERATION, RESULTS,
1102                                                                 "bdb_search: error in context csn management\n",
1103                                                                 0, 0, 0 );
1104 #else
1105                                                         Debug( LDAP_DEBUG_TRACE,
1106                                                                 "bdb_search: error in context csn management\n",
1107                                                                 0, 0, 0 );
1108 #endif
1109                                                 }
1110                                                 entry_sync_state = LDAP_SYNC_ADD;
1111
1112                                         } else {
1113                                                 if ( no_sync_state_change ) {
1114                                                         goto loop_continue;
1115                                                 }
1116                                                 entry_sync_state = LDAP_SYNC_PRESENT;
1117                                         }
1118                                 }
1119
1120                         } else {
1121                                 rs->sr_err = test_filter( sop,
1122                                         rs->sr_entry, sop->oq_search.rs_filter );
1123                         }
1124                 }
1125
1126                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1127                         /* check size limit */
1128                         if ( --sop->ors_slimit == -1 &&
1129                                 sop->o_sync_slog_size == -1 )
1130                         {
1131                                 if (!IS_PSEARCH) {
1132                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
1133                                                 &bdb->bi_cache, e, &lock );
1134                                 }
1135                                 e = NULL;
1136                                 rs->sr_entry = NULL;
1137                                 rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1138                                 rs->sr_ref = rs->sr_v2ref;
1139                                 send_ldap_result( sop, rs );
1140                                 rs->sr_err = LDAP_SUCCESS;
1141                                 goto done;
1142                         }
1143
1144                         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
1145                                 if ( rs->sr_nentries >= sop->o_pagedresults_size ) {
1146                                         send_paged_response( sop, rs, &lastid, tentries );
1147                                         goto done;
1148                                 }
1149                                 lastid = id;
1150                         }
1151
1152                         if (e) {
1153                                 /* safe default */
1154                                 int result = -1;
1155
1156                                 if (IS_PSEARCH) {
1157                                         int premodify_found = 0;
1158                                         int entry_sync_state;
1159
1160                                         if ( ps_type == LDAP_PSEARCH_BY_ADD ||
1161                                                  ps_type == LDAP_PSEARCH_BY_DELETE ||
1162                                                  ps_type == LDAP_PSEARCH_BY_MODIFY ||
1163                                                  ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1164                                         {
1165                                                 if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1166                                                         struct psid_entry* psid_e;
1167                                                         LDAP_LIST_FOREACH( psid_e,
1168                                                                 &op->o_pm_list, ps_link)
1169                                                         {
1170                                                                 if( psid_e->ps_op == sop ) {
1171                                                                         premodify_found = 1;
1172                                                                         LDAP_LIST_REMOVE(psid_e, ps_link);
1173                                                                         break;
1174                                                                 }
1175                                                         }
1176                                                         if (psid_e != NULL) free (psid_e);
1177                                                 }
1178
1179                                                 if ( ps_type == LDAP_PSEARCH_BY_ADD ) {
1180                                                         entry_sync_state = LDAP_SYNC_ADD;
1181                                                 } else if ( ps_type == LDAP_PSEARCH_BY_DELETE ) {
1182                                                         entry_sync_state = LDAP_SYNC_DELETE;
1183                                                 } else if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1184                                                         if ( premodify_found ) {
1185                                                                 entry_sync_state = LDAP_SYNC_MODIFY;
1186                                                         } else {
1187                                                                 entry_sync_state = LDAP_SYNC_ADD;
1188                                                         }
1189                                                 } else if ( ps_type == LDAP_PSEARCH_BY_SCOPEOUT ) {
1190                                                         entry_sync_state = LDAP_SYNC_DELETE;
1191                                                 } else {
1192                                                         rs->sr_err = LDAP_OTHER;
1193                                                         goto done;
1194                                                 }
1195
1196                                                 if ( sop->o_sync_slog_size != -1 ) {
1197                                                         if ( entry_sync_state == LDAP_SYNC_DELETE ) {
1198                                                                 result = slap_add_session_log( op, sop, e );
1199                                                         } else {
1200                                                                 result = 1;
1201                                                         }
1202                                                 } else {
1203                                                         struct berval cookie;
1204                                                         slap_compose_sync_cookie( sop, &cookie,
1205                                                                 search_context_csn,
1206                                                                 sop->o_sync_state.sid,
1207                                                                 sop->o_sync_state.rid );
1208                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1209                                                                 rs, e, entry_sync_state, ctrls,
1210                                                                 num_ctrls++, 1, &cookie );
1211                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1212                                                         rs->sr_attrs = attrs;
1213                                                         rs->sr_ctrls = ctrls;
1214                                                         rs->sr_flags = 0;
1215                                                         result = send_search_entry( sop, rs );
1216                                                         if ( cookie.bv_val ) ch_free( cookie.bv_val );
1217                                                         slap_sl_free(
1218                                                                 ctrls[num_ctrls-1]->ldctl_value.bv_val,
1219                                                                 sop->o_tmpmemctx );
1220                                                         slap_sl_free( ctrls[--num_ctrls],
1221                                                                 sop->o_tmpmemctx );
1222                                                         ctrls[num_ctrls] = NULL;
1223                                                         rs->sr_ctrls = NULL;
1224                                                 }
1225
1226                                         } else if ( ps_type == LDAP_PSEARCH_BY_PREMODIFY ) {
1227                                                 struct psid_entry* psid_e;
1228                                                 psid_e = (struct psid_entry *) ch_calloc(1,
1229                                                         sizeof(struct psid_entry));
1230                                                 psid_e->ps_op = sop;
1231                                                 LDAP_LIST_INSERT_HEAD( &op->o_pm_list,
1232                                                         psid_e, ps_link );
1233
1234                                         } else {
1235 #ifdef NEW_LOGGING
1236                                                 LDAP_LOG ( OPERATION, RESULTS,
1237                                                         "bdb_search: invalid ps_type (%d) \n",
1238                                                         ps_type, 0, 0);
1239 #else
1240                                                 Debug( LDAP_DEBUG_TRACE,
1241                                                         "bdb_search: invalid ps_type (%d) \n",
1242                                                         ps_type, 0, 0);
1243 #endif
1244                                         }
1245
1246                                 } else {
1247                                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1248                                                 if ( rc_sync == LDAP_COMPARE_TRUE ) { /* ADD */
1249                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1250                                                                 rs, e, entry_sync_state, ctrls,
1251                                                                 num_ctrls++, 0, NULL );
1252                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1253                                                         rs->sr_ctrls = ctrls;
1254                                                         rs->sr_attrs = sop->oq_search.rs_attrs;
1255                                                         rs->sr_flags = 0;
1256                                                         result = send_search_entry( sop, rs );
1257                                                         slap_sl_free(
1258                                                                 ctrls[num_ctrls-1]->ldctl_value.bv_val,
1259                                                                 sop->o_tmpmemctx );
1260                                                         slap_sl_free( ctrls[--num_ctrls],
1261                                                                 sop->o_tmpmemctx );
1262                                                         ctrls[num_ctrls] = NULL;
1263                                                         rs->sr_ctrls = NULL;
1264
1265                                                 } else { /* PRESENT */
1266                                                         if ( sync_send_present_mode ) {
1267                                                                 result = slap_build_syncUUID_set( sop,
1268                                                                         &syncUUID_set, e );
1269                                                                 if ( result <= 0 ) {
1270                                                                         result = -1;
1271                                                                 } else {
1272                                                                         syncUUID_set_cnt++;
1273                                                                         if ( syncUUID_set_cnt ==
1274                                                                                 SLAP_SYNCUUID_SET_SIZE )
1275                                                                         {
1276                                                                                 rs->sr_err = LDAP_SUCCESS;
1277                                                                                 rs->sr_rspoid = LDAP_SYNC_INFO;
1278                                                                                 rs->sr_ctrls = NULL;
1279                                                                                 result = slap_send_syncinfo( sop, rs,
1280                                                                                         LDAP_TAG_SYNC_ID_SET,
1281                                                                                         NULL, 0, syncUUID_set, 0 );
1282                                                                                 if ( result != LDAP_SUCCESS ) {
1283                                                                                         result = -1;
1284                                                                                 }
1285                                                                                 ber_bvarray_free_x( syncUUID_set,
1286                                                                                         sop->o_tmpmemctx );
1287                                                                                 syncUUID_set = NULL;
1288                                                                                 syncUUID_set_cnt = 0;
1289                                                                         }
1290                                                                 }
1291
1292                                                         } else {
1293                                                                 result = 1;
1294                                                         }
1295                                                 }
1296
1297                                         } else {
1298                                                 rs->sr_attrs = sop->oq_search.rs_attrs;
1299                                                 rs->sr_ctrls = NULL;
1300                                                 rs->sr_flags = 0;
1301                                                 rs->sr_err = LDAP_SUCCESS;
1302                                                 result = send_search_entry( sop, rs );
1303                                         }
1304                                 }
1305
1306                                 switch (result) {
1307                                 case 0:         /* entry sent ok */
1308                                         break;
1309                                 case 1:         /* entry not sent */
1310                                         break;
1311                                 case -1:        /* connection closed */
1312                                         if (!IS_PSEARCH) {
1313                                                 bdb_cache_return_entry_r(bdb->bi_dbenv,
1314                                                         &bdb->bi_cache, e, &lock);
1315                                         }
1316                                         e = NULL;
1317                                         rs->sr_entry = NULL;
1318                                         rs->sr_err = LDAP_OTHER;
1319                                         goto done;
1320                                 }
1321                         }
1322
1323                 } else {
1324 #ifdef NEW_LOGGING
1325                         LDAP_LOG ( OPERATION, RESULTS,
1326                                 "bdb_search: %ld does not match filter\n", (long) id, 0, 0);
1327 #else
1328                         Debug( LDAP_DEBUG_TRACE,
1329                                 "bdb_search: %ld does not match filter\n",
1330                                 (long) id, 0, 0 );
1331 #endif
1332                 }
1333
1334 loop_continue:
1335                 if( e != NULL ) {
1336                         /* free reader lock */
1337                         if (!IS_PSEARCH) {
1338                                 bdb_cache_return_entry_r( bdb->bi_dbenv,
1339                                         &bdb->bi_cache, e , &lock );
1340                                 if ( sop->o_nocaching ) {
1341                                         bdb_cache_delete_entry( bdb, ei, locker, &lock );
1342                                 }
1343                         }
1344                         e = NULL;
1345                         rs->sr_entry = NULL;
1346                 }
1347
1348                 ldap_pvt_thread_yield();
1349         }
1350
1351         if ( syncUUID_set_cnt > 0 ) {
1352                 rs->sr_err = LDAP_SUCCESS;
1353                 rs->sr_rspoid = LDAP_SYNC_INFO;
1354                 rs->sr_ctrls = NULL;
1355                 slap_send_syncinfo( sop, rs, LDAP_TAG_SYNC_ID_SET,
1356                         NULL, 0, syncUUID_set, 0 );
1357                 ber_bvarray_free_x( syncUUID_set, sop->o_tmpmemctx );
1358                 syncUUID_set_cnt = 0;
1359         }
1360
1361 nochange:
1362         if (!IS_PSEARCH) {
1363                 if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1364                         if ( sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
1365                                 struct berval cookie;
1366                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1367                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1368
1369                                 if ( sync_send_present_mode ) {
1370                                         rs->sr_err = LDAP_SUCCESS;
1371                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1372                                         rs->sr_ctrls = NULL;
1373                                         slap_send_syncinfo( sop, rs,
1374                                                 LDAP_TAG_SYNC_REFRESH_PRESENT, &cookie, 1, NULL, 0 );
1375
1376                                 } else {
1377                                         if ( !no_sync_state_change ) {
1378                                                 int slog_found = 0;
1379                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1380                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1381                                                         o_ps_link )
1382                                                 {
1383                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1384                                                                 if ( ps_list->o_sync_state.sid ==
1385                                                                         sop->o_sync_state.sid )
1386                                                                 {
1387                                                                         slog_found = 1;
1388                                                                         break;
1389                                                                 }
1390                                                         }
1391                                                 }
1392
1393                                                 if ( slog_found ) {
1394                                                         rs->sr_err = LDAP_SUCCESS;
1395                                                         rs->sr_rspoid = NULL;
1396                                                         rs->sr_ctrls = NULL;
1397                                                         slap_send_session_log( op, ps_list, rs );
1398                                                 }
1399                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1400                                         }
1401
1402                                         rs->sr_err = LDAP_SUCCESS;
1403                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1404                                         rs->sr_ctrls = NULL;
1405                                         slap_send_syncinfo( sop, rs,
1406                                                 LDAP_TAG_SYNC_REFRESH_DELETE, &cookie, 1, NULL, 0 );
1407                                 }
1408
1409                                 if ( cookie.bv_val ) ch_free( cookie.bv_val );
1410
1411                         } else {
1412                                 /* refreshOnly mode */
1413                                 struct berval cookie;
1414                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1415                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1416
1417                                 if ( sync_send_present_mode ) {
1418                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1419                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
1420
1421                                 } else {
1422                                         if ( !no_sync_state_change ) {
1423                                                 int slog_found = 0;
1424                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1425                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1426                                                         o_ps_link )
1427                                                 {
1428                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1429                                                                 if ( ps_list->o_sync_state.sid ==
1430                                                                                 sop->o_sync_state.sid ) {
1431                                                                         slog_found = 1;
1432                                                                         break;
1433                                                                 }
1434                                                         }
1435                                                 }
1436
1437                                                 if ( slog_found ) {
1438                                                         slap_send_session_log( op, ps_list, rs );
1439                                                 }
1440                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1441                                         }
1442
1443                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1444                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_DELETES );
1445                                 }
1446
1447                                 rs->sr_ctrls = ctrls;
1448                                 rs->sr_ref = rs->sr_v2ref;
1449                                 rs->sr_err = (rs->sr_v2ref == NULL)
1450                                         ? LDAP_SUCCESS : LDAP_REFERRAL;
1451                                 rs->sr_rspoid = NULL;
1452                                 send_ldap_result( sop, rs );
1453                                 if ( ctrls[num_ctrls-1]->ldctl_value.bv_val != NULL ) {
1454                                         slap_sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1455                                                 sop->o_tmpmemctx );
1456                                 }
1457                                 slap_sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1458                                 ctrls[num_ctrls] = NULL;
1459                                 if ( cookie.bv_val ) ch_free( cookie.bv_val );
1460                         }
1461
1462                 } else {
1463                         rs->sr_ctrls = NULL;
1464                         rs->sr_ref = rs->sr_v2ref;
1465                         rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1466                         rs->sr_rspoid = NULL;
1467                         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
1468                                 send_paged_response( sop, rs, NULL, 0 );
1469                         } else {
1470                                 send_ldap_result( sop, rs );
1471                         }
1472                 }
1473         }
1474
1475         rs->sr_err = LDAP_SUCCESS;
1476
1477 done:
1478         if( !IS_PSEARCH && e != NULL ) {
1479                 /* free reader lock */
1480                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
1481         }
1482
1483         LOCK_ID_FREE( bdb->bi_dbenv, locker );
1484
1485         ber_bvfree( search_context_csn );
1486
1487         if( rs->sr_v2ref ) {
1488                 ber_bvarray_free( rs->sr_v2ref );
1489                 rs->sr_v2ref = NULL;
1490         }
1491         if( realbase.bv_val ) ch_free( realbase.bv_val );
1492
1493         return rs->sr_err;
1494 }
1495
1496
1497 static int base_candidate(
1498         BackendDB       *be,
1499         Entry   *e,
1500         ID              *ids )
1501 {
1502 #ifdef NEW_LOGGING
1503         LDAP_LOG ( OPERATION, ENTRY,
1504                 "base_candidate: base: \"%s\" (0x%08lx)\n",
1505                 e->e_nname.bv_val, (long) e->e_id, 0);
1506 #else
1507         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
1508                 e->e_nname.bv_val, (long) e->e_id, 0);
1509 #endif
1510
1511         ids[0] = 1;
1512         ids[1] = e->e_id;
1513         return 0;
1514 }
1515
1516 /* Look for "objectClass Present" in this filter.
1517  * Also count depth of filter tree while we're at it.
1518  */
1519 static int oc_filter(
1520         Filter *f,
1521         int cur,
1522         int *max )
1523 {
1524         int rc = 0;
1525
1526         assert( f );
1527
1528         if( cur > *max ) *max = cur;
1529
1530         switch( f->f_choice ) {
1531         case LDAP_FILTER_PRESENT:
1532                 if (f->f_desc == slap_schema.si_ad_objectClass) {
1533                         rc = 1;
1534                 }
1535                 break;
1536
1537         case LDAP_FILTER_AND:
1538         case LDAP_FILTER_OR:
1539                 cur++;
1540                 for ( f=f->f_and; f; f=f->f_next ) {
1541                         (void) oc_filter(f, cur, max);
1542                 }
1543                 break;
1544
1545         default:
1546                 break;
1547         }
1548         return rc;
1549 }
1550
1551 static void search_stack_free( void *key, void *data )
1552 {
1553         ber_memfree_x(data, NULL);
1554 }
1555
1556 static void *search_stack( Operation *op )
1557 {
1558         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1559         void *ret = NULL;
1560
1561         if ( op->o_threadctx ) {
1562                 ldap_pvt_thread_pool_getkey( op->o_threadctx, search_stack,
1563                         &ret, NULL );
1564         } else {
1565                 ret = bdb->bi_search_stack;
1566         }
1567
1568         if ( !ret ) {
1569                 ret = ch_malloc( bdb->bi_search_stack_depth * BDB_IDL_UM_SIZE
1570                         * sizeof( ID ) );
1571                 if ( op->o_threadctx ) {
1572                         ldap_pvt_thread_pool_setkey( op->o_threadctx, search_stack,
1573                                 ret, search_stack_free );
1574                 } else {
1575                         bdb->bi_search_stack = ret;
1576                 }
1577         }
1578         return ret;
1579 }
1580
1581 static int search_candidates(
1582         Operation *stackop,
1583         Operation *op,
1584         SlapReply *rs,
1585         Entry *e,
1586         u_int32_t locker,
1587         ID      *ids,
1588         ID      *scopes )
1589 {
1590         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1591         int rc, depth = 1;
1592         Filter          f, rf, xf, nf;
1593         ID              *stack;
1594         AttributeAssertion aa_ref;
1595 #ifdef BDB_SUBENTRIES
1596         Filter  sf;
1597         AttributeAssertion aa_subentry;
1598 #endif
1599
1600         /*
1601          * This routine takes as input a filter (user-filter)
1602          * and rewrites it as follows:
1603          *      (&(scope=DN)[(objectClass=subentry)]
1604          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
1605          */
1606
1607 #ifdef NEW_LOGGING
1608         LDAP_LOG ( OPERATION, ENTRY,
1609                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1610                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope);
1611 #else
1612         Debug(LDAP_DEBUG_TRACE,
1613                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1614                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope );
1615 #endif
1616
1617         xf.f_or = op->oq_search.rs_filter;
1618         xf.f_choice = LDAP_FILTER_OR;
1619         xf.f_next = NULL;
1620
1621         /* If the user's filter uses objectClass=*,
1622          * these clauses are redundant.
1623          */
1624         if (!oc_filter(op->oq_search.rs_filter, 1, &depth)
1625                 && !get_subentries_visibility(op)
1626                 && !is_sync_protocol(op) )
1627         {
1628                 if( !get_manageDSAit(op) && !get_domainScope(op) ) {
1629                         /* match referral objects */
1630                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1631                         rf.f_choice = LDAP_FILTER_EQUALITY;
1632                         rf.f_ava = &aa_ref;
1633                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1634                         rf.f_av_value = bv_ref;
1635                         rf.f_next = xf.f_or;
1636                         xf.f_or = &rf;
1637                         depth++;
1638                 }
1639         }
1640
1641         f.f_next = NULL;
1642         f.f_choice = LDAP_FILTER_AND;
1643         f.f_and = &nf;
1644         /* Dummy; we compute scope separately now */
1645         nf.f_choice = SLAPD_FILTER_COMPUTED;
1646         nf.f_result = LDAP_SUCCESS;
1647         nf.f_next = ( xf.f_or == op->oq_search.rs_filter )
1648                 ? op->oq_search.rs_filter : &xf ;
1649         /* Filter depth increased again, adding dummy clause */
1650         depth++;
1651
1652 #ifdef BDB_SUBENTRIES
1653         if( get_subentries_visibility( op ) ) {
1654                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1655                 sf.f_choice = LDAP_FILTER_EQUALITY;
1656                 sf.f_ava = &aa_subentry;
1657                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1658                 sf.f_av_value = bv_subentry;
1659                 sf.f_next = nf.f_next;
1660                 nf.f_next = &sf;
1661         }
1662 #endif
1663
1664         /* Allocate IDL stack, plus 1 more for former tmp */
1665         if ( depth+1 > bdb->bi_search_stack_depth ) {
1666                 stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1667         } else {
1668                 stack = search_stack( stackop );
1669         }
1670
1671         if( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1672                 rc = search_aliases( op, rs, e, locker, ids, scopes, stack );
1673         } else {
1674                 rc = bdb_dn2idl( op, e, ids, stack );
1675         }
1676
1677         if ( rc == LDAP_SUCCESS ) {
1678                 rc = bdb_filter_candidates( op, &f, ids,
1679                         stack, stack+BDB_IDL_UM_SIZE );
1680         }
1681
1682         if ( depth+1 > bdb->bi_search_stack_depth ) {
1683                 ch_free( stack );
1684         }
1685
1686         if( rc ) {
1687 #ifdef NEW_LOGGING
1688                 LDAP_LOG ( OPERATION, DETAIL1,
1689                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1690 #else
1691                 Debug(LDAP_DEBUG_TRACE,
1692                         "bdb_search_candidates: failed (rc=%d)\n",
1693                         rc, NULL, NULL );
1694 #endif
1695
1696         } else {
1697 #ifdef NEW_LOGGING
1698                 LDAP_LOG ( OPERATION, DETAIL1,
1699                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1700                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1701                         (long) BDB_IDL_LAST(ids));
1702 #else
1703                 Debug(LDAP_DEBUG_TRACE,
1704                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1705                         (long) ids[0],
1706                         (long) BDB_IDL_FIRST(ids),
1707                         (long) BDB_IDL_LAST(ids) );
1708 #endif
1709         }
1710
1711         return rc;
1712 }
1713
1714 static void
1715 send_paged_response(
1716         Operation       *op,
1717         SlapReply       *rs,
1718         ID              *lastid,
1719         int             tentries )
1720 {
1721         LDAPControl     ctrl, *ctrls[2];
1722         BerElementBuffer berbuf;
1723         BerElement      *ber = (BerElement *)&berbuf;
1724         PagedResultsCookie respcookie;
1725         struct berval cookie;
1726
1727 #ifdef NEW_LOGGING
1728         LDAP_LOG ( OPERATION, ENTRY,
1729                 "send_paged_response: lastid=0x%08lx nentries=%d\n",
1730                 lastid ? *lastid : 0, rs->sr_nentries, NULL );
1731 #else
1732         Debug(LDAP_DEBUG_ARGS,
1733                 "send_paged_response: lastid=0x%08lx nentries=%d\n",
1734                 lastid ? *lastid : 0, rs->sr_nentries, NULL );
1735 #endif
1736
1737         ctrl.ldctl_value.bv_val = NULL;
1738         ctrls[0] = &ctrl;
1739         ctrls[1] = NULL;
1740
1741         ber_init2( ber, NULL, LBER_USE_DER );
1742
1743         if ( lastid ) {
1744                 respcookie = ( PagedResultsCookie )(*lastid);
1745                 cookie.bv_len = sizeof( respcookie );
1746                 cookie.bv_val = (char *)&respcookie;
1747
1748         } else {
1749                 respcookie = ( PagedResultsCookie )0;
1750                 cookie.bv_val = "";
1751                 cookie.bv_len = 0;
1752         }
1753
1754         op->o_conn->c_pagedresults_state.ps_cookie = respcookie;
1755         op->o_conn->c_pagedresults_state.ps_count =
1756                 op->o_pagedresults_state.ps_count + rs->sr_nentries;
1757
1758         /* return size of 0 -- no estimate */
1759         ber_printf( ber, "{iO}", 0, &cookie );
1760
1761         if ( ber_flatten2( ber, &ctrls[0]->ldctl_value, 0 ) == -1 ) {
1762                 goto done;
1763         }
1764
1765         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1766         ctrls[0]->ldctl_iscritical = 0;
1767
1768         rs->sr_ctrls = ctrls;
1769         rs->sr_err = LDAP_SUCCESS;
1770         send_ldap_result( op, rs );
1771         rs->sr_ctrls = NULL;
1772
1773 done:
1774         (void) ber_free_buf( ber );
1775 }
1776