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

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