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 retry1:
 219                         rs->sr_err = bdb_cache_find_id(op, NULL,
 220                                 ida, &ei, 0, locker, &lockr );
 221                         if (rs->sr_err != LDAP_SUCCESS) {
 222                                 if ( rs->sr_err == DB_LOCK_DEADLOCK ||
 223                                         rs->sr_err == DB_LOCK_NOTGRANTED ) goto retry1;
 224                                 continue;
 225                         }
 226                         a = ei->bei_e;
 227
 228                         /* This should only happen if the curscop IDL has maxed out and
 229                          * turned into a range that spans IDs indiscriminately
 230                          */
 231                         if (!is_entry_alias(a)) {
 232                                 bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 233                                         a, &lockr);
 234                                 continue;
 235                         }
 236
 237                         /* Actually dereference the alias */
 238                         BDB_IDL_ZERO(tmp);
 239                         a = deref_base( op, rs, a, &matched, locker, &lockr,
 240                                 tmp, visited );
 241                         if (a) {
 242                                 /* If the target was not already in our current candidates,
 243                                  * make note of it in the newsubs list. Also
 244                                  * set it in the scopes list so that bdb_search
 245                                  * can check it.
 246                                  */
 247                                 if (bdb_idl_insert(ids, a->e_id) == 0) {
 248                                         bdb_idl_insert(newsubs, a->e_id);
 249                                         bdb_idl_insert(scopes, a->e_id);
 250                                 }
 251                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 252                                         a, &lockr);
 253
 254                         } else if (matched) {
 255                                 /* Alias could not be dereferenced, or it deref'd to
 256                                  * an ID we've already seen. Ignore it.
 257                                  */
 258                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 259                                         matched, &lockr );
 260                                 rs->sr_text = NULL;
 261                         }
 262                 }
 263                 /* If this is a OneLevel search, we're done; oldsubs only had one
 264                  * ID in it. For a Subtree search, oldsubs may be a list of scope IDs.
 265                  */
 266                 if ( op->ors_scope == LDAP_SCOPE_ONELEVEL ) break;
 267 nextido:
 268                 ido = bdb_idl_next( oldsubs, &cursoro );
 269
 270                 /* If we're done processing the old scopes, did we add any new
 271                  * scopes in this iteration? If so, go back and do those now.
 272                  */
 273                 if (ido == NOID) {
 274                         if (BDB_IDL_IS_ZERO(newsubs)) break;
 275                         BDB_IDL_CPY(oldsubs, newsubs);
 276                         BDB_IDL_ZERO(newsubs);
 277                         cursoro = 0;
 278                         ido = bdb_idl_first( oldsubs, &cursoro );
 279                 }
 280
 281                 /* Find the entry corresponding to the next scope. If it can't
 282                  * be found, ignore it and move on. This should never happen;
 283                  * we should never see the ID of an entry that doesn't exist.
 284                  * Set the name so that the scope's IDL can be retrieved.
 285                  */
 286                 ei = NULL;
 287 sameido:
 288                 rs->sr_err = bdb_cache_find_id(op, NULL, ido, &ei,
 289                         0, locker, &locka );
 290                 if ( rs->sr_err != LDAP_SUCCESS ) {
 291                         if ( rs->sr_err == DB_LOCK_DEADLOCK ||
 292                                 rs->sr_err == DB_LOCK_NOTGRANTED )
 293                                 goto sameido;
 294                         goto nextido;
 295                 }
 296                 e = ei->bei_e;
 297         }
 298         return rs->sr_err;
 299 }
 300
 301 #define is_sync_protocol(op)    \
 302         ((op)->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST)
 303
 304 #define IS_BDB_REPLACE(type) (( type == LDAP_PSEARCH_BY_DELETE ) || \
 305         ( type == LDAP_PSEARCH_BY_SCOPEOUT ))
 306 #define IS_PSEARCH (op != sop)
 307
 308 static Operation *
 309 bdb_drop_psearch( Operation *op, ber_int_t msgid )
 310 {
 311         Operation       *ps_list;
 312         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 313
 314         LDAP_LIST_FOREACH ( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 315                 if ( ps_list->o_connid == op->o_connid ) {
 316                         if ( ps_list->o_msgid == msgid ) {
 317                                 ps_list->o_abandon = 1;
 318                                 LDAP_LIST_REMOVE( ps_list, o_ps_link );
 319                                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
 320                                 LDAP_STAILQ_REMOVE( &op->o_conn->c_ops, ps_list,
 321                                         slap_op, o_next );
 322                                 LDAP_STAILQ_NEXT( ps_list, o_next ) = NULL;
 323                                 op->o_conn->c_n_ops_executing--;
 324                                 op->o_conn->c_n_ops_completed++;
 325                                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
 326                                 return ps_list;
 327                         }
 328                 }
 329         }
 330
 331         return NULL;
 332 }
 333
 334 int
 335 bdb_abandon( Operation *op, SlapReply *rs )
 336 {
 337         Operation       *ps;
 338
 339         ps = bdb_drop_psearch( op, op->oq_abandon.rs_msgid );
 340         if ( ps ) {
 341                 if ( ps->o_tmpmemctx ) {
 342                         slap_sl_mem_destroy( NULL, ps->o_tmpmemctx );
 343                 }
 344                 slap_op_free ( ps );
 345                 return LDAP_SUCCESS;
 346         }
 347         return LDAP_UNAVAILABLE;
 348 }
 349
 350 int
 351 bdb_cancel( Operation *op, SlapReply *rs )
 352 {
 353         Operation       *ps;
 354
 355         ps = bdb_drop_psearch( op, op->oq_cancel.rs_msgid );
 356         if ( ps ) {
 357                 rs->sr_err = LDAP_CANCELLED;
 358                 send_ldap_result( ps, rs );
 359                 if ( ps->o_tmpmemctx ) {
 360                         slap_sl_mem_destroy( NULL, ps->o_tmpmemctx );
 361                 }
 362                 slap_op_free ( ps );
 363                 return LDAP_SUCCESS;
 364         }
 365         return LDAP_UNAVAILABLE;
 366 }
 367
 368 int bdb_search( Operation *op, SlapReply *rs )
 369 {
 370         return bdb_do_search( op, rs, op, NULL, 0 );
 371 }
 372
 373 int bdb_psearch( Operation *op, SlapReply *rs, Operation *sop,
 374         Entry *ps_e, int ps_type )
 375 {
 376         int     rc;
 377
 378         sop->o_private = op->o_private;
 379         rc = bdb_do_search( op, rs, sop, ps_e, ps_type );
 380         sop->o_private = NULL;
 381
 382         return rc;
 383 }
 384
 385 /* For persistent searches, op is the currently executing operation,
 386  * sop is the persistent search. For regular searches, sop = op.
 387  */
 388 int
 389 bdb_do_search( Operation *op, SlapReply *rs, Operation *sop,
 390         Entry *ps_e, int ps_type )
 391 {
 392         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 393         time_t          stoptime;
 394         ID              id, cursor;
 395         ID              candidates[BDB_IDL_UM_SIZE];
 396         ID              scopes[BDB_IDL_DB_SIZE];
 397         Entry           *e = NULL, base, e_root = {0};
 398         Entry           *matched = NULL;
 399         EntryInfo       *ei, ei_root = {0};
 400         struct berval   realbase = BER_BVNULL;
 401         int             manageDSAit;
 402         int             tentries = 0;
 403         ID              lastid = NOID;
 404         AttributeName   *attrs;
 405
 406         Filter          contextcsnand, contextcsnle, cookief, csnfnot,
 407                         csnfeq, csnfand, csnfge;
 408         AttributeAssertion aa_ge, aa_eq, aa_le;
 409         struct berval   *search_context_csn = NULL;
 410         DB_LOCK         ctxcsn_lock;
 411         LDAPControl     *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
 412         int             num_ctrls = 0;
 413         AttributeName   uuid_attr[2];
 414         int             rc_sync = 0;
 415         int             entry_sync_state = -1;
 416         AttributeName   null_attr;
 417         int             no_sync_state_change = 0;
 418
 419         u_int32_t       locker = 0;
 420         DB_LOCK         lock;
 421
 422         Operation       *ps_list;
 423         int                     sync_send_present_mode = 1;
 424         int                     match;
 425         MatchingRule *mr;
 426         const char *text;
 427         int                     slog_found = 0;
 428
 429         BerVarray       syncUUID_set = NULL;
 430         int                     syncUUID_set_cnt = 0;
 431
 432         struct  bdb_op_info     *opinfo = NULL;
 433         DB_TXN                  *ltid = NULL;
 434
 435 #ifdef NEW_LOGGING
 436         LDAP_LOG( OPERATION, ENTRY, "bdb_search\n", 0, 0, 0 );
 437 #else
 438         Debug( LDAP_DEBUG_TRACE, "=> bdb_search\n", 0, 0, 0);
 439 #endif
 440         attrs = sop->oq_search.rs_attrs;
 441
 442         opinfo = (struct bdb_op_info *) op->o_private;
 443
 444         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST ) {
 445                 struct slap_session_entry *sent;
 446                 if ( sop->o_sync_state.sid >= 0 ) {
 447                         LDAP_LIST_FOREACH( sent, &bdb->bi_session_list, se_link ) {
 448                                 if ( sent->se_id == sop->o_sync_state.sid ) {
 449                                         sop->o_sync_slog_size = sent->se_size;
 450                                         break;
 451                                 }
 452                         }
 453                 }
 454         }
 455
 456         /* psearch needs to be registered before refresh begins */
 457         /* psearch and refresh transmission is serialized in send_ldap_ber() */
 458         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
 459                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 460                 LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 461                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 462
 463         } else if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST
 464                 && sop->o_sync_slog_size >= 0 )
 465         {
 466                 ldap_pvt_thread_rdwr_wlock( &bdb->bi_pslist_rwlock );
 467                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 468                         if ( ps_list->o_sync_slog_size >= 0 ) {
 469                                 if ( ps_list->o_sync_state.sid == sop->o_sync_state.sid ) {
 470                                         slog_found = 1;
 471                                         break;
 472                                 }
 473                         }
 474                 }
 475
 476                 if ( slog_found ) {
 477                         if ( ps_list->o_sync_slog_omitcsn.bv_len != 0 ) {
 478                                 mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 479                                 if ( sop->o_sync_state.ctxcsn &&
 480                                         sop->o_sync_state.ctxcsn->bv_val != NULL )
 481                                 {
 482                                         value_match( &match, slap_schema.si_ad_entryCSN, mr,
 483                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 484                                                 sop->o_sync_state.ctxcsn,
 485                                                 &ps_list->o_sync_slog_omitcsn,
 486                                                 &text );
 487                                 } else {
 488                                         match = -1;
 489                                 }
 490                                 if ( match >= 0 ) {
 491                                         sync_send_present_mode = 0;
 492                                 }
 493                         } else {
 494                                 sync_send_present_mode = 0;
 495                         }
 496                 } else if ( sop->o_sync_slog_size >= 0 ) {
 497                         LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 498                 } else {
 499                         sop->o_sync_state.sid = -1;
 500                 }
 501                 ldap_pvt_thread_rdwr_wunlock( &bdb->bi_pslist_rwlock );
 502         }
 503
 504         null_attr.an_desc = NULL;
 505         null_attr.an_oc = NULL;
 506         null_attr.an_oc_exclude = 0;
 507         null_attr.an_name.bv_len = 0;
 508         null_attr.an_name.bv_val = NULL;
 509
 510         for( num_ctrls = 0; num_ctrls < SLAP_MAX_RESPONSE_CONTROLS; num_ctrls++ ) {
 511                 ctrls[num_ctrls] = NULL;
 512         }
 513         num_ctrls = 0;
 514
 515         if ( IS_PSEARCH && IS_BDB_REPLACE(ps_type)) {
 516                 attrs = uuid_attr;
 517                 attrs[0].an_desc = NULL;
 518                 attrs[0].an_oc = NULL;
 519                 attrs[0].an_oc_exclude = 0;
 520                 attrs[0].an_name.bv_len = 0;
 521                 attrs[0].an_name.bv_val = NULL;
 522         }
 523
 524         manageDSAit = get_manageDSAit( sop );
 525
 526         /* Sync control overrides manageDSAit */
 527         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
 528                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 529                         manageDSAit = SLAP_CRITICAL_CONTROL;
 530                 }
 531         } else if ( IS_PSEARCH ) {
 532                 if ( manageDSAit == SLAP_NO_CONTROL ) {
 533                         manageDSAit = SLAP_CRITICAL_CONTROL;
 534                 }
 535         }
 536
 537         if ( opinfo ) {
 538                 ltid = opinfo->boi_txn;
 539                 locker = TXN_ID( ltid );
 540         } else {
 541                 rs->sr_err = LOCK_ID( bdb->bi_dbenv, &locker );
 542
 543                 switch(rs->sr_err) {
 544                 case 0:
 545                         break;
 546                 default:
 547                         send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 548                         return rs->sr_err;
 549                 }
 550         }
 551
 552         if ( sop->o_req_ndn.bv_len == 0 ) {
 553                 /* DIT root special case */
 554                 ei_root.bei_e = &e_root;
 555                 ei_root.bei_parent = &ei_root;
 556                 e_root.e_private = &ei_root;
 557                 e_root.e_id = 0;
 558                 e_root.e_nname.bv_val="";
 559                 e_root.e_name.bv_val="";
 560                 ei = &ei_root;
 561                 rs->sr_err = LDAP_SUCCESS;
 562         } else {
 563 dn2entry_retry:
 564                 /* get entry with reader lock */
 565                 rs->sr_err = bdb_dn2entry( op, ltid, &sop->o_req_ndn, &ei,
 566                         1, locker, &lock );
 567         }
 568
 569         switch(rs->sr_err) {
 570         case DB_NOTFOUND:
 571                 matched = ei->bei_e;
 572                 break;
 573         case 0:
 574                 e = ei->bei_e;
 575                 break;
 576         case LDAP_BUSY:
 577                 send_ldap_error( sop, rs, LDAP_BUSY, "ldap server busy" );
 578                 if ( !opinfo )
 579                         LOCK_ID_FREE (bdb->bi_dbenv, locker );
 580                 return LDAP_BUSY;
 581         case DB_LOCK_DEADLOCK:
 582         case DB_LOCK_NOTGRANTED:
 583                 goto dn2entry_retry;
 584         default:
 585                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 586                 if ( !opinfo )
 587                         LOCK_ID_FREE (bdb->bi_dbenv, locker );
 588                 return rs->sr_err;
 589         }
 590
 591         if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
 592                 BDB_IDL_ZERO(candidates);
 593                 e = deref_base( op, rs, e, &matched, locker, &lock,
 594                         candidates, NULL );
 595         }
 596
 597         if ( e == NULL ) {
 598                 struct berval matched_dn = BER_BVNULL;
 599
 600                 if ( matched != NULL ) {
 601                         BerVarray erefs;
 602                         ber_dupbv( &matched_dn, &matched->e_name );
 603
 604                         erefs = is_entry_referral( matched )
 605                                 ? get_entry_referrals( op, matched )
 606                                 : NULL;
 607
 608                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 609                                 matched, &lock);
 610                         matched = NULL;
 611
 612                         if( erefs ) {
 613                                 rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 614                                         &sop->o_req_dn, sop->oq_search.rs_scope );
 615                                 ber_bvarray_free( erefs );
 616                         }
 617
 618                 } else {
 619                         rs->sr_ref = referral_rewrite( default_referral,
 620                                 NULL, &sop->o_req_dn, sop->oq_search.rs_scope );
 621                 }
 622
 623                 rs->sr_err = LDAP_REFERRAL;
 624                 rs->sr_matched = matched_dn.bv_val;
 625                 send_ldap_result( sop, rs );
 626
 627                 if ( !opinfo )
 628                         LOCK_ID_FREE (bdb->bi_dbenv, locker );
 629                 if ( rs->sr_ref ) {
 630                         ber_bvarray_free( rs->sr_ref );
 631                         rs->sr_ref = NULL;
 632                 }
 633                 if ( matched_dn.bv_val ) {
 634                         ber_memfree( matched_dn.bv_val );
 635                         rs->sr_matched = NULL;
 636                 }
 637                 return rs->sr_err;
 638         }
 639
 640         if ( !manageDSAit && e != &e_root && is_entry_referral( e ) ) {
 641                 /* entry is a referral, don't allow add */
 642                 struct berval matched_dn;
 643                 BerVarray erefs;
 644
 645                 ber_dupbv( &matched_dn, &e->e_name );
 646                 erefs = get_entry_referrals( op, e );
 647
 648                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 649                 e = NULL;
 650
 651                 if( erefs ) {
 652                         rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 653                                 &sop->o_req_dn, sop->oq_search.rs_scope );
 654                         ber_bvarray_free( erefs );
 655                 }
 656
 657 #ifdef NEW_LOGGING
 658                 LDAP_LOG ( OPERATION, RESULTS,
 659                         "bdb_search: entry is referral\n", 0, 0, 0 );
 660 #else
 661                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 662                         0, 0, 0 );
 663 #endif
 664
 665                 if (!rs->sr_ref) rs->sr_text = "bad_referral object";
 666                 rs->sr_err = LDAP_REFERRAL;
 667                 rs->sr_matched = matched_dn.bv_val;
 668                 send_ldap_result( sop, rs );
 669
 670                 if ( !opinfo )
 671                         LOCK_ID_FREE (bdb->bi_dbenv, locker );
 672                 ber_bvarray_free( rs->sr_ref );
 673                 rs->sr_ref = NULL;
 674                 ber_memfree( matched_dn.bv_val );
 675                 rs->sr_matched = NULL;
 676                 return 1;
 677         }
 678
 679         if ( get_assert( op ) &&
 680                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 681         {
 682                 rs->sr_err = LDAP_ASSERTION_FAILED;
 683                 send_ldap_result( sop, rs );
 684                 return 1;
 685         }
 686
 687         /* compute it anyway; root does not use it */
 688         stoptime = op->o_time + sop->ors_tlimit;
 689
 690         /* need normalized dn below */
 691         ber_dupbv( &realbase, &e->e_nname );
 692
 693         /* Copy info to base, must free entry before accessing the database
 694          * in search_candidates, to avoid deadlocks.
 695          */
 696         base.e_private = e->e_private;
 697         base.e_nname = realbase;
 698         base.e_id = e->e_id;
 699
 700         if ( e != &e_root ) {
 701                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 702         }
 703         e = NULL;
 704
 705         if ( !IS_PSEARCH ) {
 706                 rs->sr_err = bdb_get_commit_csn( sop, rs, &search_context_csn,
 707                         locker, &ctxcsn_lock );
 708
 709                 if ( rs->sr_err != LDAP_SUCCESS ) {
 710                         send_ldap_error( sop, rs, rs->sr_err,
 711                                 "error in csn management in search" );
 712                         goto done;
 713                 }
 714
 715                 if ( sop->o_sync_mode != SLAP_SYNC_NONE &&
 716                         sop->o_sync_state.ctxcsn &&
 717                         sop->o_sync_state.ctxcsn->bv_val &&
 718                         ber_bvcmp( &sop->o_sync_state.ctxcsn[0], search_context_csn ) == 0 )
 719                 {
 720                         bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 721                         goto nochange;
 722                 }
 723         } else {
 724                 search_context_csn = ber_dupbv( NULL, &op->o_sync_csn );
 725         }
 726
 727         /* select candidates */
 728         if ( sop->oq_search.rs_scope == LDAP_SCOPE_BASE ) {
 729                 rs->sr_err = base_candidate( op->o_bd, &base, candidates );
 730
 731         } else {
 732                 BDB_IDL_ZERO( candidates );
 733                 BDB_IDL_ZERO( scopes );
 734                 rs->sr_err = search_candidates( op, sop, rs, &base,
 735                         locker, candidates, scopes );
 736         }
 737
 738         if ( !IS_PSEARCH && sop->o_sync_mode != SLAP_SYNC_NONE ) {
 739                 bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 740         }
 741
 742         /* start cursor at beginning of candidates.
 743          */
 744         cursor = 0;
 745         if (IS_PSEARCH) {
 746                 if ( !BDB_IDL_IS_RANGE( candidates ) ) {
 747                         cursor = bdb_idl_search( candidates, ps_e->e_id );
 748                         if ( candidates[cursor] != ps_e->e_id ) {
 749                                 rs->sr_err = LDAP_SUCCESS;
 750                                 goto done;
 751                         }
 752                 } else if ( ps_e->e_id < BDB_IDL_RANGE_FIRST( candidates ) ||
 753                         ps_e->e_id > BDB_IDL_RANGE_LAST( candidates ))
 754                 {
 755                         rs->sr_err = LDAP_SUCCESS;
 756                         goto done;
 757                 }
 758                 candidates[0] = 1;
 759                 candidates[1] = ps_e->e_id;
 760         }
 761
 762         if ( candidates[0] == 0 ) {
 763 #ifdef NEW_LOGGING
 764                 LDAP_LOG ( OPERATION, RESULTS,
 765                         "bdb_search: no candidates\n", 0, 0, 0 );
 766 #else
 767                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 768                         0, 0, 0 );
 769 #endif
 770
 771                 goto nochange;
 772         }
 773
 774         /* if not root and candidates exceed to-be-checked entries, abort */
 775         if ( sop->ors_limit     /* isroot == TRUE */ &&
 776                 sop->ors_limit->lms_s_unchecked != -1 &&
 777                 BDB_IDL_N(candidates) > (unsigned) sop->ors_limit->lms_s_unchecked )
 778         {
 779                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 780                 send_ldap_result( sop, rs );
 781                 rs->sr_err = LDAP_SUCCESS;
 782                 goto done;
 783         }
 784
 785         if ( sop->ors_limit == NULL     /* isroot == FALSE */ ||
 786                 !sop->ors_limit->lms_s_pr_hide )
 787         {
 788                 tentries = BDB_IDL_N(candidates);
 789         }
 790
 791         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
 792                 if ( (ID)( sop->o_pagedresults_state.ps_cookie ) == 0 ) {
 793                         id = bdb_idl_first( candidates, &cursor );
 794
 795                 } else {
 796                         if ( sop->o_pagedresults_size == 0 ) {
 797                                 rs->sr_err = LDAP_SUCCESS;
 798                                 rs->sr_text = "search abandoned by pagedResult size=0";
 799                                 send_ldap_result( sop, rs );
 800                                 goto done;
 801                         }
 802                         for ( id = bdb_idl_first( candidates, &cursor );
 803                                 id != NOID &&
 804                                         id <= (ID)( sop->o_pagedresults_state.ps_cookie );
 805                                 id = bdb_idl_next( candidates, &cursor ) )
 806                         {
 807                                 /* empty */;
 808                         }
 809                 }
 810
 811                 if ( cursor == NOID ) {
 812 #ifdef NEW_LOGGING
 813                         LDAP_LOG ( OPERATION, RESULTS,
 814                                 "bdb_search: no paged results candidates\n",
 815                                 0, 0, 0 );
 816 #else
 817                         Debug( LDAP_DEBUG_TRACE,
 818                                 "bdb_search: no paged results candidates\n",
 819                                 0, 0, 0 );
 820 #endif
 821                         send_paged_response( sop, rs, &lastid, 0 );
 822
 823                         rs->sr_err = LDAP_OTHER;
 824                         goto done;
 825                 }
 826                 goto loop_begin;
 827         }
 828
 829         if (( sop->o_sync_mode & SLAP_SYNC_REFRESH ) || IS_PSEARCH ) {
 830                 int match;
 831
 832                 cookief.f_choice = LDAP_FILTER_AND;
 833                 cookief.f_and = &csnfnot;
 834                 cookief.f_next = NULL;
 835
 836                 csnfnot.f_choice = LDAP_FILTER_NOT;
 837                 csnfnot.f_not = &csnfeq;
 838                 csnfnot.f_next = &csnfand;
 839
 840                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 841                 csnfeq.f_ava = &aa_eq;
 842                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 843                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 844                         csnfeq.f_av_value = *sop->o_sync_state.ctxcsn;
 845                 } else {
 846                         csnfeq.f_av_value = slap_empty_bv;
 847                 }
 848
 849                 csnfand.f_choice = LDAP_FILTER_AND;
 850                 csnfand.f_and = &csnfge;
 851                 csnfand.f_next = NULL;
 852
 853                 csnfge.f_choice = LDAP_FILTER_GE;
 854                 csnfge.f_ava = &aa_ge;
 855                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 856                 if ( sop->o_sync_state.ctxcsn != NULL ) {
 857                         csnfge.f_av_value = *sop->o_sync_state.ctxcsn;
 858                 } else {
 859                         csnfge.f_av_value = slap_empty_bv;
 860                 }
 861
 862                 if ( search_context_csn && !IS_PSEARCH ) {
 863                         csnfge.f_next = &contextcsnand;
 864
 865                         contextcsnand.f_choice = LDAP_FILTER_AND;
 866                         contextcsnand.f_and = &contextcsnle;
 867                         contextcsnand.f_next = NULL;
 868
 869                         contextcsnle.f_choice = LDAP_FILTER_LE;
 870                         contextcsnle.f_ava = &aa_le;
 871                         contextcsnle.f_av_desc = slap_schema.si_ad_entryCSN;
 872                         contextcsnle.f_av_value = *search_context_csn;
 873                         contextcsnle.f_next = sop->oq_search.rs_filter;
 874
 875                         mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 876                         if ( sop->o_sync_state.ctxcsn &&
 877                                 sop->o_sync_state.ctxcsn->bv_val != NULL )
 878                         {
 879                                 value_match( &match, slap_schema.si_ad_entryCSN, mr,
 880                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 881                                                 &sop->o_sync_state.ctxcsn[0], search_context_csn,
 882                                                 &text );
 883                         } else {
 884                                 match = -1;
 885                         }
 886                         no_sync_state_change = ( match >= 0 );
 887                 } else {
 888                         csnfge.f_next = sop->oq_search.rs_filter;
 889                 }
 890         }
 891
 892         for ( id = bdb_idl_first( candidates, &cursor );
 893                 id != NOID && !no_sync_state_change;
 894                 id = bdb_idl_next( candidates, &cursor ) )
 895         {
 896                 int scopeok = 0;
 897
 898 loop_begin:
 899                 /* check for abandon */
 900                 if ( sop->o_abandon ) {
 901                         if ( sop != op ) {
 902                                 bdb_drop_psearch( sop, sop->o_msgid );
 903                         }
 904                         rs->sr_err = LDAP_SUCCESS;
 905                         goto done;
 906                 }
 907
 908                 if ( sop->o_cancel ) {
 909                         assert( sop->o_cancel == SLAP_CANCEL_REQ );
 910                         rs->sr_err = LDAP_CANCELLED;
 911                         send_ldap_result( sop, rs );
 912                         sop->o_cancel = SLAP_CANCEL_ACK;
 913                         rs->sr_err = LDAP_SUCCESS;
 914                         goto done;
 915                 }
 916
 917                 /* check time limit */
 918                 if ( sop->ors_tlimit != SLAP_NO_LIMIT
 919                                 && slap_get_time() > stoptime )
 920                 {
 921                         rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 922                         rs->sr_ref = rs->sr_v2ref;
 923                         send_ldap_result( sop, rs );
 924                         rs->sr_err = LDAP_SUCCESS;
 925                         goto done;
 926                 }
 927
 928                 if (!IS_PSEARCH) {
 929 id2entry_retry:
 930                         /* get the entry with reader lock */
 931                         ei = NULL;
 932                         rs->sr_err = bdb_cache_find_id( op, ltid,
 933                                 id, &ei, 0, locker, &lock );
 934
 935                         if (rs->sr_err == LDAP_BUSY) {
 936                                 rs->sr_text = "ldap server busy";
 937                                 send_ldap_result( sop, rs );
 938                                 goto done;
 939
 940                         } else if ( rs->sr_err == DB_LOCK_DEADLOCK
 941                                 || rs->sr_err == DB_LOCK_NOTGRANTED )
 942                         {
 943                                 goto id2entry_retry;
 944                         }
 945
 946                         if ( ei && rs->sr_err == LDAP_SUCCESS ) {
 947                                 e = ei->bei_e;
 948                         } else {
 949                                 e = NULL;
 950                         }
 951
 952                         if ( e == NULL ) {
 953                                 if( !BDB_IDL_IS_RANGE(candidates) ) {
 954                                         /* only complain for non-range IDLs */
 955 #ifdef NEW_LOGGING
 956                                         LDAP_LOG ( OPERATION, RESULTS,
 957                                                 "bdb_search: candidate %ld not found\n",
 958                                                 (long) id, 0, 0);
 959 #else
 960                                         Debug( LDAP_DEBUG_TRACE,
 961                                                 "bdb_search: candidate %ld not found\n",
 962                                                 (long) id, 0, 0 );
 963 #endif
 964                                 }
 965
 966                                 goto loop_continue;
 967                         }
 968                 } else {
 969                         e = ps_e;
 970                 }
 971
 972                 rs->sr_entry = e;
 973
 974 #ifdef BDB_SUBENTRIES
 975                 /* FIXME: send all but syncrepl */
 976 #if 0
 977                 if ( !is_sync_protocol( sop ) )
 978 #endif
 979                 {
 980                         if ( is_entry_subentry( e ) ) {
 981                                 if( sop->oq_search.rs_scope != LDAP_SCOPE_BASE ) {
 982                                         if(!get_subentries_visibility( sop )) {
 983                                                 /* only subentries are visible */
 984                                                 goto loop_continue;
 985                                         }
 986
 987                                 } else if ( get_subentries( sop ) &&
 988                                         !get_subentries_visibility( sop ))
 989                                 {
 990                                         /* only subentries are visible */
 991                                         goto loop_continue;
 992                                 }
 993
 994                         } else if ( get_subentries_visibility( sop )) {
 995                                 /* only subentries are visible */
 996                                 goto loop_continue;
 997                         }
 998                 }
 999 #endif /* BDB_SUBENTRIES */
1000
1001                 /* Does this candidate actually satisfy the search scope?
1002                  *
1003                  * Note that we don't lock access to the bei_parent pointer.
1004                  * Since only leaf nodes can be deleted, the parent of any
1005                  * node will always be a valid node. Also since we have
1006                  * a Read lock on the data, it cannot be renamed out of the
1007                  * scope while we are looking at it, and unless we're using
1008                  * BDB_HIER, its parents cannot be moved either.
1009                  */
1010                 switch( sop->ors_scope ) {
1011                 case LDAP_SCOPE_BASE:
1012                         /* This is always true, yes? */
1013                         if ( id == base.e_id ) scopeok = 1;
1014                         break;
1015
1016                 case LDAP_SCOPE_ONELEVEL:
1017                         if ( ei->bei_parent->bei_id == base.e_id ) scopeok = 1;
1018                         break;
1019
1020 #ifdef LDAP_SCOPE_CHILDREN
1021                 case LDAP_SCOPE_CHILDREN:
1022                         if ( id == base.e_id ) break;
1023                         /* Fall-thru */
1024 #endif
1025                 case LDAP_SCOPE_SUBTREE: {
1026                         EntryInfo *tmp;
1027                         for (tmp = BEI(e); tmp;
1028                                  tmp = tmp->bei_parent ) {
1029                                 if ( tmp->bei_id == base.e_id ) {
1030                                         scopeok = 1;
1031                                         break;
1032                                 }
1033                         }
1034                         } break;
1035                 }
1036
1037 #ifdef BDB_ALIASES
1038                 /* aliases were already dereferenced in candidate list */
1039                 if ( sop->ors_deref & LDAP_DEREF_SEARCHING ) {
1040                         /* but if the search base is an alias, and we didn't
1041                          * deref it when finding, return it.
1042                          */
1043                         if ( is_entry_alias(e) &&
1044                                 ((sop->ors_deref & LDAP_DEREF_FINDING) ||
1045                                         !bvmatch(&e->e_nname, &op->o_req_ndn)))
1046                         {
1047                                 goto loop_continue;
1048                         }
1049
1050                         /* scopes is only non-empty for onelevel or subtree */
1051                         if ( !scopeok && BDB_IDL_N(scopes) ) {
1052                                 unsigned x;
1053                                 if ( sop->ors_scope == LDAP_SCOPE_ONELEVEL ) {
1054                                         x = bdb_idl_search( scopes, e->e_id );
1055                                         if ( scopes[x] == e->e_id ) scopeok = 1;
1056                                 } else {
1057                                         /* subtree, walk up the tree */
1058                                         EntryInfo *tmp = BEI(e);
1059                                         for (;tmp->bei_parent; tmp=tmp->bei_parent) {
1060                                                 x = bdb_idl_search( scopes, tmp->bei_id );
1061                                                 if ( scopes[x] == tmp->bei_id ) {
1062                                                         scopeok = 1;
1063                                                         break;
1064                                                 }
1065                                         }
1066                                 }
1067                         }
1068                 }
1069 #endif
1070
1071                 /* Not in scope, ignore it */
1072                 if ( !scopeok ) {
1073 #ifdef NEW_LOGGING
1074                         LDAP_LOG ( OPERATION, RESULTS,
1075                                 "bdb_search: %ld scope not okay\n",
1076                                 (long) id, 0, 0);
1077 #else
1078                         Debug( LDAP_DEBUG_TRACE,
1079                                 "bdb_search: %ld scope not okay\n",
1080                                 (long) id, 0, 0 );
1081 #endif
1082                         goto loop_continue;
1083                 }
1084
1085                 /*
1086                  * if it's a referral, add it to the list of referrals. only do
1087                  * this for non-base searches, and don't check the filter
1088                  * explicitly here since it's only a candidate anyway.
1089                  */
1090                 if ( !manageDSAit && sop->oq_search.rs_scope != LDAP_SCOPE_BASE
1091                         && is_entry_referral( e ) )
1092                 {
1093                         BerVarray erefs = get_entry_referrals( sop, e );
1094                         rs->sr_ref = referral_rewrite( erefs, &e->e_name, NULL,
1095                                 sop->oq_search.rs_scope == LDAP_SCOPE_ONELEVEL
1096                                         ? LDAP_SCOPE_BASE : LDAP_SCOPE_SUBTREE );
1097
1098                         send_search_reference( sop, rs );
1099
1100                         ber_bvarray_free( rs->sr_ref );
1101                         ber_bvarray_free( erefs );
1102                         rs->sr_ref = NULL;
1103
1104                         goto loop_continue;
1105                 }
1106
1107                 if ( !manageDSAit && is_entry_glue( e )) {
1108                         goto loop_continue;
1109                 }
1110
1111                 /* if it matches the filter and scope, send it */
1112                 if (IS_PSEARCH) {
1113                         if (ps_type != LDAP_PSEARCH_BY_SCOPEOUT) {
1114                                 rs->sr_err = test_filter( sop, rs->sr_entry, &cookief );
1115                         } else {
1116                                 rs->sr_err = LDAP_COMPARE_TRUE;
1117                         }
1118
1119                 } else {
1120                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1121                                 rc_sync = test_filter( sop, rs->sr_entry, &cookief );
1122                                 rs->sr_err = test_filter( sop, rs->sr_entry, &contextcsnand );
1123                                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1124                                         if ( rc_sync == LDAP_COMPARE_TRUE ) {
1125                                                 if ( no_sync_state_change ) {
1126 #ifdef NEW_LOGGING
1127                                                         LDAP_LOG ( OPERATION, RESULTS,
1128                                                                 "bdb_search: error in context csn management\n",
1129                                                                 0, 0, 0 );
1130 #else
1131                                                         Debug( LDAP_DEBUG_TRACE,
1132                                                                 "bdb_search: error in context csn management\n",
1133                                                                 0, 0, 0 );
1134 #endif
1135                                                 }
1136                                                 entry_sync_state = LDAP_SYNC_ADD;
1137
1138                                         } else {
1139                                                 if ( no_sync_state_change ) {
1140                                                         goto loop_continue;
1141                                                 }
1142                                                 entry_sync_state = LDAP_SYNC_PRESENT;
1143                                         }
1144                                 }
1145
1146                         } else {
1147                                 rs->sr_err = test_filter( sop,
1148                                         rs->sr_entry, sop->oq_search.rs_filter );
1149                         }
1150                 }
1151
1152                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1153                         /* check size limit */
1154                         if ( --sop->ors_slimit == -1 &&
1155                                 sop->o_sync_slog_size == -1 )
1156                         {
1157                                 if (!IS_PSEARCH) {
1158                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
1159                                                 &bdb->bi_cache, e, &lock );
1160                                 }
1161                                 e = NULL;
1162                                 rs->sr_entry = NULL;
1163                                 rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1164                                 rs->sr_ref = rs->sr_v2ref;
1165                                 send_ldap_result( sop, rs );
1166                                 rs->sr_err = LDAP_SUCCESS;
1167                                 goto done;
1168                         }
1169
1170                         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
1171                                 if ( rs->sr_nentries >= sop->o_pagedresults_size ) {
1172                                         send_paged_response( sop, rs, &lastid, tentries );
1173                                         goto done;
1174                                 }
1175                                 lastid = id;
1176                         }
1177
1178                         if (e) {
1179                                 /* safe default */
1180                                 int result = -1;
1181
1182                                 if (IS_PSEARCH) {
1183                                         int premodify_found = 0;
1184                                         int entry_sync_state;
1185
1186                                         if ( ps_type == LDAP_PSEARCH_BY_ADD ||
1187                                                  ps_type == LDAP_PSEARCH_BY_DELETE ||
1188                                                  ps_type == LDAP_PSEARCH_BY_MODIFY ||
1189                                                  ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1190                                         {
1191                                                 if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1192                                                         struct psid_entry* psid_e;
1193                                                         LDAP_LIST_FOREACH( psid_e,
1194                                                                 &op->o_pm_list, ps_link)
1195                                                         {
1196                                                                 if( psid_e->ps_op == sop ) {
1197                                                                         premodify_found = 1;
1198                                                                         LDAP_LIST_REMOVE(psid_e, ps_link);
1199                                                                         break;
1200                                                                 }
1201                                                         }
1202                                                         if (psid_e != NULL) free (psid_e);
1203                                                 }
1204
1205                                                 if ( ps_type == LDAP_PSEARCH_BY_ADD ) {
1206                                                         entry_sync_state = LDAP_SYNC_ADD;
1207                                                 } else if ( ps_type == LDAP_PSEARCH_BY_DELETE ) {
1208                                                         entry_sync_state = LDAP_SYNC_DELETE;
1209                                                 } else if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1210                                                         if ( premodify_found ) {
1211                                                                 entry_sync_state = LDAP_SYNC_MODIFY;
1212                                                         } else {
1213                                                                 entry_sync_state = LDAP_SYNC_ADD;
1214                                                         }
1215                                                 } else if ( ps_type == LDAP_PSEARCH_BY_SCOPEOUT ) {
1216                                                         entry_sync_state = LDAP_SYNC_DELETE;
1217                                                 } else {
1218                                                         rs->sr_err = LDAP_OTHER;
1219                                                         goto done;
1220                                                 }
1221
1222                                                 if ( sop->o_sync_slog_size != -1 ) {
1223                                                         if ( entry_sync_state == LDAP_SYNC_DELETE ) {
1224                                                                 result = slap_add_session_log( op, sop, e );
1225                                                         } else {
1226                                                                 result = 1;
1227                                                         }
1228                                                 } else {
1229                                                         struct berval cookie;
1230                                                         slap_compose_sync_cookie( sop, &cookie,
1231                                                                 search_context_csn,
1232                                                                 sop->o_sync_state.sid,
1233                                                                 sop->o_sync_state.rid );
1234                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1235                                                                 rs, e, entry_sync_state, ctrls,
1236                                                                 num_ctrls++, 1, &cookie );
1237                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1238                                                         rs->sr_attrs = attrs;
1239                                                         rs->sr_ctrls = ctrls;
1240                                                         rs->sr_flags = 0;
1241                                                         result = send_search_entry( sop, rs );
1242                                                         if ( cookie.bv_val ) ch_free( cookie.bv_val );
1243                                                         slap_sl_free(
1244                                                                 ctrls[num_ctrls-1]->ldctl_value.bv_val,
1245                                                                 sop->o_tmpmemctx );
1246                                                         slap_sl_free( ctrls[--num_ctrls],
1247                                                                 sop->o_tmpmemctx );
1248                                                         ctrls[num_ctrls] = NULL;
1249                                                         rs->sr_ctrls = NULL;
1250                                                 }
1251
1252                                         } else if ( ps_type == LDAP_PSEARCH_BY_PREMODIFY ) {
1253                                                 struct psid_entry* psid_e;
1254                                                 psid_e = (struct psid_entry *) ch_calloc(1,
1255                                                         sizeof(struct psid_entry));
1256                                                 psid_e->ps_op = sop;
1257                                                 LDAP_LIST_INSERT_HEAD( &op->o_pm_list,
1258                                                         psid_e, ps_link );
1259
1260                                         } else {
1261 #ifdef NEW_LOGGING
1262                                                 LDAP_LOG ( OPERATION, RESULTS,
1263                                                         "bdb_search: invalid ps_type (%d) \n",
1264                                                         ps_type, 0, 0);
1265 #else
1266                                                 Debug( LDAP_DEBUG_TRACE,
1267                                                         "bdb_search: invalid ps_type (%d) \n",
1268                                                         ps_type, 0, 0);
1269 #endif
1270                                         }
1271
1272                                 } else {
1273                                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1274                                                 if ( rc_sync == LDAP_COMPARE_TRUE ) { /* ADD */
1275                                                         rs->sr_err = slap_build_sync_state_ctrl( sop,
1276                                                                 rs, e, entry_sync_state, ctrls,
1277                                                                 num_ctrls++, 0, NULL );
1278                                                         if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1279                                                         rs->sr_ctrls = ctrls;
1280                                                         rs->sr_attrs = sop->oq_search.rs_attrs;
1281                                                         rs->sr_flags = 0;
1282                                                         result = send_search_entry( sop, rs );
1283                                                         slap_sl_free(
1284                                                                 ctrls[num_ctrls-1]->ldctl_value.bv_val,
1285                                                                 sop->o_tmpmemctx );
1286                                                         slap_sl_free( ctrls[--num_ctrls],
1287                                                                 sop->o_tmpmemctx );
1288                                                         ctrls[num_ctrls] = NULL;
1289                                                         rs->sr_ctrls = NULL;
1290
1291                                                 } else { /* PRESENT */
1292                                                         if ( sync_send_present_mode ) {
1293                                                                 result = slap_build_syncUUID_set( sop,
1294                                                                         &syncUUID_set, e );
1295                                                                 if ( result <= 0 ) {
1296                                                                         result = -1;
1297                                                                 } else {
1298                                                                         syncUUID_set_cnt++;
1299                                                                         if ( syncUUID_set_cnt ==
1300                                                                                 SLAP_SYNCUUID_SET_SIZE )
1301                                                                         {
1302                                                                                 rs->sr_err = LDAP_SUCCESS;
1303                                                                                 rs->sr_rspoid = LDAP_SYNC_INFO;
1304                                                                                 rs->sr_ctrls = NULL;
1305                                                                                 result = slap_send_syncinfo( sop, rs,
1306                                                                                         LDAP_TAG_SYNC_ID_SET,
1307                                                                                         NULL, 0, syncUUID_set, 0 );
1308                                                                                 if ( result != LDAP_SUCCESS ) {
1309                                                                                         result = -1;
1310                                                                                 }
1311                                                                                 ber_bvarray_free_x( syncUUID_set,
1312                                                                                         sop->o_tmpmemctx );
1313                                                                                 syncUUID_set = NULL;
1314                                                                                 syncUUID_set_cnt = 0;
1315                                                                         }
1316                                                                 }
1317
1318                                                         } else {
1319                                                                 result = 1;
1320                                                         }
1321                                                 }
1322
1323                                         } else {
1324                                                 rs->sr_attrs = sop->oq_search.rs_attrs;
1325                                                 rs->sr_ctrls = NULL;
1326                                                 rs->sr_flags = 0;
1327                                                 rs->sr_err = LDAP_SUCCESS;
1328                                                 result = send_search_entry( sop, rs );
1329                                         }
1330                                 }
1331
1332                                 switch (result) {
1333                                 case 0:         /* entry sent ok */
1334                                         break;
1335                                 case 1:         /* entry not sent */
1336                                         break;
1337                                 case -1:        /* connection closed */
1338                                         if (!IS_PSEARCH) {
1339                                                 bdb_cache_return_entry_r(bdb->bi_dbenv,
1340                                                         &bdb->bi_cache, e, &lock);
1341                                         }
1342                                         e = NULL;
1343                                         rs->sr_entry = NULL;
1344                                         rs->sr_err = LDAP_OTHER;
1345                                         goto done;
1346                                 }
1347                         }
1348
1349                 } else {
1350 #ifdef NEW_LOGGING
1351                         LDAP_LOG ( OPERATION, RESULTS,
1352                                 "bdb_search: %ld does not match filter\n", (long) id, 0, 0);
1353 #else
1354                         Debug( LDAP_DEBUG_TRACE,
1355                                 "bdb_search: %ld does not match filter\n",
1356                                 (long) id, 0, 0 );
1357 #endif
1358                 }
1359
1360 loop_continue:
1361                 if( e != NULL ) {
1362                         /* free reader lock */
1363                         if (!IS_PSEARCH) {
1364                                 bdb_cache_return_entry_r( bdb->bi_dbenv,
1365                                         &bdb->bi_cache, e , &lock );
1366                                 if ( sop->o_nocaching ) {
1367                                         bdb_cache_delete_entry( bdb, ei, locker, &lock );
1368                                 }
1369                         }
1370                         e = NULL;
1371                         rs->sr_entry = NULL;
1372                 }
1373
1374                 ldap_pvt_thread_yield();
1375         }
1376
1377         if ( syncUUID_set_cnt > 0 ) {
1378                 rs->sr_err = LDAP_SUCCESS;
1379                 rs->sr_rspoid = LDAP_SYNC_INFO;
1380                 rs->sr_ctrls = NULL;
1381                 slap_send_syncinfo( sop, rs, LDAP_TAG_SYNC_ID_SET,
1382                         NULL, 0, syncUUID_set, 0 );
1383                 ber_bvarray_free_x( syncUUID_set, sop->o_tmpmemctx );
1384                 syncUUID_set_cnt = 0;
1385         }
1386
1387 nochange:
1388         if (!IS_PSEARCH) {
1389                 if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1390                         if ( sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
1391                                 struct berval cookie;
1392                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1393                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1394
1395                                 if ( sync_send_present_mode ) {
1396                                         rs->sr_err = LDAP_SUCCESS;
1397                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1398                                         rs->sr_ctrls = NULL;
1399                                         slap_send_syncinfo( sop, rs,
1400                                                 LDAP_TAG_SYNC_REFRESH_PRESENT, &cookie, 1, NULL, 0 );
1401
1402                                 } else {
1403                                         if ( !no_sync_state_change ) {
1404                                                 int slog_found = 0;
1405                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1406                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1407                                                         o_ps_link )
1408                                                 {
1409                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1410                                                                 if ( ps_list->o_sync_state.sid ==
1411                                                                         sop->o_sync_state.sid )
1412                                                                 {
1413                                                                         slog_found = 1;
1414                                                                         break;
1415                                                                 }
1416                                                         }
1417                                                 }
1418
1419                                                 if ( slog_found ) {
1420                                                         rs->sr_err = LDAP_SUCCESS;
1421                                                         rs->sr_rspoid = NULL;
1422                                                         rs->sr_ctrls = NULL;
1423                                                         slap_send_session_log( op, ps_list, rs );
1424                                                 }
1425                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1426                                         }
1427
1428                                         rs->sr_err = LDAP_SUCCESS;
1429                                         rs->sr_rspoid = LDAP_SYNC_INFO;
1430                                         rs->sr_ctrls = NULL;
1431                                         slap_send_syncinfo( sop, rs,
1432                                                 LDAP_TAG_SYNC_REFRESH_DELETE, &cookie, 1, NULL, 0 );
1433                                 }
1434
1435                                 if ( cookie.bv_val ) ch_free( cookie.bv_val );
1436
1437                         } else {
1438                                 /* refreshOnly mode */
1439                                 struct berval cookie;
1440                                 slap_compose_sync_cookie( sop, &cookie, search_context_csn,
1441                                         sop->o_sync_state.sid, sop->o_sync_state.rid );
1442
1443                                 if ( sync_send_present_mode ) {
1444                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1445                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_PRESENTS );
1446
1447                                 } else {
1448                                         if ( !no_sync_state_change ) {
1449                                                 int slog_found = 0;
1450                                                 ldap_pvt_thread_rdwr_rlock( &bdb->bi_pslist_rwlock );
1451                                                 LDAP_LIST_FOREACH( ps_list, &bdb->bi_psearch_list,
1452                                                         o_ps_link )
1453                                                 {
1454                                                         if ( ps_list->o_sync_slog_size > 0 ) {
1455                                                                 if ( ps_list->o_sync_state.sid ==
1456                                                                                 sop->o_sync_state.sid ) {
1457                                                                         slog_found = 1;
1458                                                                         break;
1459                                                                 }
1460                                                         }
1461                                                 }
1462
1463                                                 if ( slog_found ) {
1464                                                         slap_send_session_log( op, ps_list, rs );
1465                                                 }
1466                                                 ldap_pvt_thread_rdwr_runlock( &bdb->bi_pslist_rwlock );
1467                                         }
1468
1469                                         slap_build_sync_done_ctrl( sop, rs, ctrls,
1470                                                 num_ctrls++, 1, &cookie, LDAP_SYNC_REFRESH_DELETES );
1471                                 }
1472
1473                                 rs->sr_ctrls = ctrls;
1474                                 rs->sr_ref = rs->sr_v2ref;
1475                                 rs->sr_err = (rs->sr_v2ref == NULL)
1476                                         ? LDAP_SUCCESS : LDAP_REFERRAL;
1477                                 rs->sr_rspoid = NULL;
1478                                 send_ldap_result( sop, rs );
1479                                 if ( ctrls[num_ctrls-1]->ldctl_value.bv_val != NULL ) {
1480                                         slap_sl_free( ctrls[num_ctrls-1]->ldctl_value.bv_val,
1481                                                 sop->o_tmpmemctx );
1482                                 }
1483                                 slap_sl_free( ctrls[--num_ctrls], sop->o_tmpmemctx );
1484                                 ctrls[num_ctrls] = NULL;
1485                                 if ( cookie.bv_val ) ch_free( cookie.bv_val );
1486                         }
1487
1488                 } else {
1489                         rs->sr_ctrls = NULL;
1490                         rs->sr_ref = rs->sr_v2ref;
1491                         rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1492                         rs->sr_rspoid = NULL;
1493                         if ( get_pagedresults(sop) > SLAP_NO_CONTROL ) {
1494                                 send_paged_response( sop, rs, NULL, 0 );
1495                         } else {
1496                                 send_ldap_result( sop, rs );
1497                         }
1498                 }
1499         }
1500
1501         rs->sr_err = LDAP_SUCCESS;
1502
1503 done:
1504         if( !IS_PSEARCH && e != NULL ) {
1505                 /* free reader lock */
1506                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
1507         }
1508
1509         if ( !opinfo )
1510                 LOCK_ID_FREE( bdb->bi_dbenv, locker );
1511
1512         ber_bvfree( search_context_csn );
1513
1514         if( rs->sr_v2ref ) {
1515                 ber_bvarray_free( rs->sr_v2ref );
1516                 rs->sr_v2ref = NULL;
1517         }
1518         if( realbase.bv_val ) ch_free( realbase.bv_val );
1519
1520         return rs->sr_err;
1521 }
1522
1523
1524 static int base_candidate(
1525         BackendDB       *be,
1526         Entry   *e,
1527         ID              *ids )
1528 {
1529 #ifdef NEW_LOGGING
1530         LDAP_LOG ( OPERATION, ENTRY,
1531                 "base_candidate: base: \"%s\" (0x%08lx)\n",
1532                 e->e_nname.bv_val, (long) e->e_id, 0);
1533 #else
1534         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
1535                 e->e_nname.bv_val, (long) e->e_id, 0);
1536 #endif
1537
1538         ids[0] = 1;
1539         ids[1] = e->e_id;
1540         return 0;
1541 }
1542
1543 /* Look for "objectClass Present" in this filter.
1544  * Also count depth of filter tree while we're at it.
1545  */
1546 static int oc_filter(
1547         Filter *f,
1548         int cur,
1549         int *max )
1550 {
1551         int rc = 0;
1552
1553         assert( f );
1554
1555         if( cur > *max ) *max = cur;
1556
1557         switch( f->f_choice ) {
1558         case LDAP_FILTER_PRESENT:
1559                 if (f->f_desc == slap_schema.si_ad_objectClass) {
1560                         rc = 1;
1561                 }
1562                 break;
1563
1564         case LDAP_FILTER_AND:
1565         case LDAP_FILTER_OR:
1566                 cur++;
1567                 for ( f=f->f_and; f; f=f->f_next ) {
1568                         (void) oc_filter(f, cur, max);
1569                 }
1570                 break;
1571
1572         default:
1573                 break;
1574         }
1575         return rc;
1576 }
1577
1578 static void search_stack_free( void *key, void *data )
1579 {
1580         ber_memfree_x(data, NULL);
1581 }
1582
1583 static void *search_stack( Operation *op )
1584 {
1585         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1586         void *ret = NULL;
1587
1588         if ( op->o_threadctx ) {
1589                 ldap_pvt_thread_pool_getkey( op->o_threadctx, search_stack,
1590                         &ret, NULL );
1591         } else {
1592                 ret = bdb->bi_search_stack;
1593         }
1594
1595         if ( !ret ) {
1596                 ret = ch_malloc( bdb->bi_search_stack_depth * BDB_IDL_UM_SIZE
1597                         * sizeof( ID ) );
1598                 if ( op->o_threadctx ) {
1599                         ldap_pvt_thread_pool_setkey( op->o_threadctx, search_stack,
1600                                 ret, search_stack_free );
1601                 } else {
1602                         bdb->bi_search_stack = ret;
1603                 }
1604         }
1605         return ret;
1606 }
1607
1608 static int search_candidates(
1609         Operation *stackop,
1610         Operation *op,
1611         SlapReply *rs,
1612         Entry *e,
1613         u_int32_t locker,
1614         ID      *ids,
1615         ID      *scopes )
1616 {
1617         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1618         int rc, depth = 1;
1619         Filter          f, rf, xf, nf;
1620         ID              *stack;
1621         AttributeAssertion aa_ref;
1622 #ifdef BDB_SUBENTRIES
1623         Filter  sf;
1624         AttributeAssertion aa_subentry;
1625 #endif
1626
1627         /*
1628          * This routine takes as input a filter (user-filter)
1629          * and rewrites it as follows:
1630          *      (&(scope=DN)[(objectClass=subentry)]
1631          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
1632          */
1633
1634 #ifdef NEW_LOGGING
1635         LDAP_LOG ( OPERATION, ENTRY,
1636                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1637                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope);
1638 #else
1639         Debug(LDAP_DEBUG_TRACE,
1640                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1641                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope );
1642 #endif
1643
1644         xf.f_or = op->oq_search.rs_filter;
1645         xf.f_choice = LDAP_FILTER_OR;
1646         xf.f_next = NULL;
1647
1648         /* If the user's filter uses objectClass=*,
1649          * these clauses are redundant.
1650          */
1651         if (!oc_filter(op->oq_search.rs_filter, 1, &depth)
1652                 && !get_subentries_visibility(op)
1653                 && !is_sync_protocol(op) )
1654         {
1655                 if( !get_manageDSAit(op) && !get_domainScope(op) ) {
1656                         /* match referral objects */
1657                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1658                         rf.f_choice = LDAP_FILTER_EQUALITY;
1659                         rf.f_ava = &aa_ref;
1660                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1661                         rf.f_av_value = bv_ref;
1662                         rf.f_next = xf.f_or;
1663                         xf.f_or = &rf;
1664                         depth++;
1665                 }
1666         }
1667
1668         f.f_next = NULL;
1669         f.f_choice = LDAP_FILTER_AND;
1670         f.f_and = &nf;
1671         /* Dummy; we compute scope separately now */
1672         nf.f_choice = SLAPD_FILTER_COMPUTED;
1673         nf.f_result = LDAP_SUCCESS;
1674         nf.f_next = ( xf.f_or == op->oq_search.rs_filter )
1675                 ? op->oq_search.rs_filter : &xf ;
1676         /* Filter depth increased again, adding dummy clause */
1677         depth++;
1678
1679 #ifdef BDB_SUBENTRIES
1680         if( get_subentries_visibility( op ) ) {
1681                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1682                 sf.f_choice = LDAP_FILTER_EQUALITY;
1683                 sf.f_ava = &aa_subentry;
1684                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1685                 sf.f_av_value = bv_subentry;
1686                 sf.f_next = nf.f_next;
1687                 nf.f_next = &sf;
1688         }
1689 #endif
1690
1691         /* Allocate IDL stack, plus 1 more for former tmp */
1692         if ( depth+1 > bdb->bi_search_stack_depth ) {
1693                 stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1694         } else {
1695                 stack = search_stack( stackop );
1696         }
1697
1698         if( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1699                 rc = search_aliases( op, rs, e, locker, ids, scopes, stack );
1700         } else {
1701                 rc = bdb_dn2idl( op, e, ids, stack );
1702         }
1703
1704         if ( rc == LDAP_SUCCESS ) {
1705                 rc = bdb_filter_candidates( op, &f, ids,
1706                         stack, stack+BDB_IDL_UM_SIZE );
1707         }
1708
1709         if ( depth+1 > bdb->bi_search_stack_depth ) {
1710                 ch_free( stack );
1711         }
1712
1713         if( rc ) {
1714 #ifdef NEW_LOGGING
1715                 LDAP_LOG ( OPERATION, DETAIL1,
1716                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1717 #else
1718                 Debug(LDAP_DEBUG_TRACE,
1719                         "bdb_search_candidates: failed (rc=%d)\n",
1720                         rc, NULL, NULL );
1721 #endif
1722
1723         } else {
1724 #ifdef NEW_LOGGING
1725                 LDAP_LOG ( OPERATION, DETAIL1,
1726                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1727                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1728                         (long) BDB_IDL_LAST(ids));
1729 #else
1730                 Debug(LDAP_DEBUG_TRACE,
1731                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1732                         (long) ids[0],
1733                         (long) BDB_IDL_FIRST(ids),
1734                         (long) BDB_IDL_LAST(ids) );
1735 #endif
1736         }
1737
1738         return rc;
1739 }
1740
1741 static void
1742 send_paged_response(
1743         Operation       *op,
1744         SlapReply       *rs,
1745         ID              *lastid,
1746         int             tentries )
1747 {
1748         LDAPControl     ctrl, *ctrls[2];
1749         BerElementBuffer berbuf;
1750         BerElement      *ber = (BerElement *)&berbuf;
1751         PagedResultsCookie respcookie;
1752         struct berval cookie;
1753
1754 #ifdef NEW_LOGGING
1755         LDAP_LOG ( OPERATION, ENTRY,
1756                 "send_paged_response: lastid=0x%08lx nentries=%d\n",
1757                 lastid ? *lastid : 0, rs->sr_nentries, NULL );
1758 #else
1759         Debug(LDAP_DEBUG_ARGS,
1760                 "send_paged_response: lastid=0x%08lx nentries=%d\n",
1761                 lastid ? *lastid : 0, rs->sr_nentries, NULL );
1762 #endif
1763
1764         ctrl.ldctl_value.bv_val = NULL;
1765         ctrls[0] = &ctrl;
1766         ctrls[1] = NULL;
1767
1768         ber_init2( ber, NULL, LBER_USE_DER );
1769
1770         if ( lastid ) {
1771                 respcookie = ( PagedResultsCookie )(*lastid);
1772                 cookie.bv_len = sizeof( respcookie );
1773                 cookie.bv_val = (char *)&respcookie;
1774
1775         } else {
1776                 respcookie = ( PagedResultsCookie )0;
1777                 cookie.bv_val = "";
1778                 cookie.bv_len = 0;
1779         }
1780
1781         op->o_conn->c_pagedresults_state.ps_cookie = respcookie;
1782         op->o_conn->c_pagedresults_state.ps_count =
1783                 op->o_pagedresults_state.ps_count + rs->sr_nentries;
1784
1785         /* return size of 0 -- no estimate */
1786         ber_printf( ber, "{iO}", 0, &cookie );
1787
1788         if ( ber_flatten2( ber, &ctrls[0]->ldctl_value, 0 ) == -1 ) {
1789                 goto done;
1790         }
1791
1792         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1793         ctrls[0]->ldctl_iscritical = 0;
1794
1795         rs->sr_ctrls = ctrls;
1796         rs->sr_err = LDAP_SUCCESS;
1797         send_ldap_result( op, rs );
1798         rs->sr_ctrls = NULL;
1799
1800 done:
1801         (void) ber_free_buf( ber );
1802 }
1803