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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2006 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/socket.h>
  28 #include <ac/string.h>
  29 #include <ac/time.h>
  30
  31 #include "slap.h"
  32 #include "../back-ldap/back-ldap.h"
  33 #include "back-meta.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "ldap_log.h"
  36 #include "../../../libraries/libldap/ldap-int.h"
  37
  38 /* IGNORE means that target does not (no longer) participate
  39  * in the search;
  40  * NOTREADY means the search on that target has not been initialized yet
  41  */
  42 #define META_MSGID_IGNORE       (-1)
  43 #define META_MSGID_NEED_BIND    (-2)
  44
  45 static int
  46 meta_send_entry(
  47         Operation       *op,
  48         SlapReply       *rs,
  49         metaconn_t      *mc,
  50         int             i,
  51         LDAPMessage     *e );
  52
  53 typedef enum meta_search_candidate_t {
  54         META_SEARCH_ERR = -1,
  55         META_SEARCH_NOT_CANDIDATE,
  56         META_SEARCH_CANDIDATE,
  57         META_SEARCH_BINDING,
  58         META_SEARCH_NEED_BIND
  59 } meta_search_candidate_t;
  60
  61 /*
  62  * meta_search_dobind_init()
  63  *
  64  * initiates bind for a candidate target of a search.
  65  */
  66 static meta_search_candidate_t
  67 meta_search_dobind_init(
  68         Operation               *op,
  69         SlapReply               *rs,
  70         metaconn_t              **mcp,
  71         int                     candidate,
  72         SlapReply               *candidates )
  73 {
  74         metaconn_t              *mc = *mcp;
  75         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
  76         metatarget_t            *mt = mi->mi_targets[ candidate ];
  77         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
  78
  79         struct berval           binddn = msc->msc_bound_ndn,
  80                                 cred = msc->msc_cred;
  81         int                     method;
  82
  83         int                     rc;
  84
  85         meta_search_candidate_t retcode;
  86
  87         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n", op->o_log_prefix, candidate, 0 );
  88
  89         /*
  90          * all the targets are already bound as pseudoroot
  91          */
  92         if ( mc->mc_authz_target == META_BOUND_ALL ) {
  93                 return META_SEARCH_CANDIDATE;
  94         }
  95
  96         retcode = META_SEARCH_BINDING;
  97         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
  98         if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
  99                 /* already bound (or anonymous) */
 100                 retcode = META_SEARCH_CANDIDATE;
 101
 102         } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 103                 /* another thread is binding the target for this conn; wait */
 104                 candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
 105                 retcode = META_SEARCH_NEED_BIND;
 106
 107         } else {
 108                 /* we'll need to bind the target for this conn */
 109                 LDAP_BACK_CONN_BINDING_SET( msc );
 110         }
 111         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 112         if ( retcode != META_SEARCH_BINDING ) {
 113                 return retcode;
 114         }
 115
 116         if ( msc->msc_ld == NULL ) {
 117                 /* for some reason (e.g. because formerly in "binding"
 118                  * state, with eventual connection expiration or invalidation)
 119                  * it was not initialized as expected */
 120
 121                 Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] ld=NULL\n",
 122                         op->o_log_prefix, candidate, 0 );
 123
 124                 rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
 125                         LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND );
 126                 switch ( rc ) {
 127                 case LDAP_SUCCESS:
 128                         assert( msc->msc_ld != NULL );
 129                         break;
 130
 131                 case LDAP_SERVER_DOWN:
 132                         goto down;
 133
 134                 default:
 135                         goto other;
 136                 }
 137         }
 138
 139         /* NOTE: this obsoletes pseudorootdn */
 140         if ( op->o_conn != NULL &&
 141                 !op->o_do_not_cache &&
 142                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 143                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 144                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 145         {
 146                 rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
 147                 if ( rc != LDAP_SUCCESS ) {
 148                         goto down;
 149                 }
 150
 151                 /* NOTE: we copy things here, even if bind didn't succeed yet,
 152                  * because the connection is not shared until bind is over */
 153                 if ( !BER_BVISNULL( &binddn ) ) {
 154                         ber_bvreplace( &msc->msc_bound_ndn, &binddn );
 155                         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &cred ) ) {
 156                                 ber_dupbv( &msc->msc_cred, &cred );
 157                         }
 158                 }
 159
 160                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 161                         /* apparently, idassert was configured with SASL bind,
 162                          * so bind occurred inside meta_back_proxy_authz_cred() */
 163                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 164                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 165                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 166                         return META_SEARCH_CANDIDATE;
 167                 }
 168
 169                 /* paranoid */
 170                 switch ( method ) {
 171                 case LDAP_AUTH_NONE:
 172                 case LDAP_AUTH_SIMPLE:
 173                         /* do a simple bind with binddn, cred */
 174                         break;
 175
 176                 default:
 177                         assert( 0 );
 178                         break;
 179                 }
 180         }
 181
 182         assert( msc->msc_ld != NULL );
 183
 184         rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
 185                         NULL, NULL, &candidates[ candidate ].sr_msgid );
 186         switch ( rc ) {
 187         case LDAP_SUCCESS:
 188                 META_BINDING_SET( &candidates[ candidate ] );
 189                 return META_SEARCH_BINDING;
 190
 191         case LDAP_SERVER_DOWN:
 192 down:;
 193                 /* This is the worst thing that could happen:
 194                  * the search will wait until the retry is over. */
 195                 if ( meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
 196                         return META_SEARCH_CANDIDATE;
 197                 }
 198
 199                 if ( *mcp == NULL ) {
 200                         retcode = META_SEARCH_ERR;
 201                         rs->sr_err = LDAP_UNAVAILABLE;
 202                         break;
 203                 }
 204                 /* fall thru */
 205
 206         default:
 207 other:;
 208                 rs->sr_err = rc;
 209                 rc = slap_map_api2result( rs );
 210
 211                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 212                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 213                 if ( META_BACK_ONERR_STOP( mi ) ) {
 214                         LDAP_BACK_CONN_TAINTED_SET( mc );
 215                         meta_back_release_conn( op, mc );
 216                         *mcp = NULL;
 217
 218                         retcode = META_SEARCH_ERR;
 219
 220                 } else {
 221                         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 222                         retcode = META_SEARCH_NOT_CANDIDATE;
 223                 }
 224                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 225                 break;
 226         }
 227
 228         return retcode;
 229 }
 230
 231 static meta_search_candidate_t
 232 meta_search_dobind_result(
 233         Operation               *op,
 234         SlapReply               *rs,
 235         metaconn_t              **mcp,
 236         int                     candidate,
 237         SlapReply               *candidates,
 238         LDAPMessage             *res )
 239 {
 240         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 241         metaconn_t              *mc = *mcp;
 242         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 243
 244         meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
 245         int                     rc;
 246
 247         assert( msc->msc_ld != NULL );
 248
 249         /* FIXME: matched? referrals? response controls? */
 250         rc = ldap_parse_result( msc->msc_ld, res,
 251                 &candidates[ candidate ].sr_err,
 252                 NULL, NULL, NULL, NULL, 0 );
 253         if ( rc != LDAP_SUCCESS ) {
 254                 candidates[ candidate ].sr_err = rc;
 255         }
 256         rc = slap_map_api2result( &candidates[ candidate ] );
 257
 258         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 259         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 260         if ( rc != LDAP_SUCCESS ) {
 261                 if ( META_BACK_ONERR_STOP( mi ) ) {
 262                         LDAP_BACK_CONN_TAINTED_SET( mc );
 263                         meta_back_release_conn( op, mc );
 264                         *mcp = NULL;
 265                         retcode = META_SEARCH_ERR;
 266                 }
 267
 268         } else {
 269                 /* FIXME: check if bound as idassert authcDN! */
 270                 if ( be_isroot( op ) ) {
 271                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 272                 } else {
 273                         LDAP_BACK_CONN_ISANON_SET( msc );
 274                 }
 275                 retcode = META_SEARCH_CANDIDATE;
 276         }
 277         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 278
 279         META_BINDING_CLEAR( &candidates[ candidate ] );
 280
 281         return retcode;
 282 }
 283
 284 static meta_search_candidate_t
 285 meta_back_search_start(
 286         Operation               *op,
 287         SlapReply               *rs,
 288         dncookie                *dc,
 289         metaconn_t              **mcp,
 290         int                     candidate,
 291         SlapReply               *candidates )
 292 {
 293         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 294         metatarget_t            *mt = mi->mi_targets[ candidate ];
 295         metasingleconn_t        *msc = &(*mcp)->mc_conns[ candidate ];
 296         struct berval           realbase = op->o_req_dn;
 297         int                     realscope = op->ors_scope;
 298         struct berval           mbase = BER_BVNULL;
 299         struct berval           mfilter = BER_BVNULL;
 300         char                    **mapped_attrs = NULL;
 301         int                     rc;
 302         meta_search_candidate_t retcode;
 303         struct timeval          tv, *tvp = NULL;
 304         int                     nretries = 1;
 305         LDAPControl             **ctrls = NULL;
 306
 307         /* this should not happen; just in case... */
 308         if ( msc->msc_ld == NULL ) {
 309                 Debug( LDAP_DEBUG_ANY,
 310                         "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
 311                         op->o_log_prefix, candidate,
 312                         META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
 313                 if ( META_BACK_ONERR_STOP( mi ) ) {
 314                         return META_SEARCH_ERR;
 315                 }
 316                 return META_SEARCH_NOT_CANDIDATE;
 317         }
 318
 319         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
 320
 321         /*
 322          * modifies the base according to the scope, if required
 323          */
 324         if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
 325                 switch ( op->ors_scope ) {
 326                 case LDAP_SCOPE_SUBTREE:
 327                         /*
 328                          * make the target suffix the new base
 329                          * FIXME: this is very forgiving, because
 330                          * "illegal" searchBases may be turned
 331                          * into the suffix of the target; however,
 332                          * the requested searchBase already passed
 333                          * thru the candidate analyzer...
 334                          */
 335                         if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
 336                                 realbase = mt->mt_nsuffix;
 337                                 if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 338                                         realscope = LDAP_SCOPE_SUBORDINATE;
 339                                 }
 340
 341                         } else {
 342                                 /*
 343                                  * this target is no longer candidate
 344                                  */
 345                                 retcode = META_SEARCH_NOT_CANDIDATE;
 346                                 goto doreturn;
 347                         }
 348                         break;
 349
 350                 case LDAP_SCOPE_SUBORDINATE:
 351                 case LDAP_SCOPE_ONELEVEL:
 352                 {
 353                         struct berval   rdn = mt->mt_nsuffix;
 354                         rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
 355                         if ( dnIsOneLevelRDN( &rdn )
 356                                         && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
 357                         {
 358                                 /*
 359                                  * if there is exactly one level,
 360                                  * make the target suffix the new
 361                                  * base, and make scope "base"
 362                                  */
 363                                 realbase = mt->mt_nsuffix;
 364                                 if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
 365                                         if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 366                                                 realscope = LDAP_SCOPE_SUBORDINATE;
 367                                         } else {
 368                                                 realscope = LDAP_SCOPE_SUBTREE;
 369                                         }
 370                                 } else {
 371                                         realscope = LDAP_SCOPE_BASE;
 372                                 }
 373                                 break;
 374                         } /* else continue with the next case */
 375                 }
 376
 377                 case LDAP_SCOPE_BASE:
 378                         /*
 379                          * this target is no longer candidate
 380                          */
 381                         retcode = META_SEARCH_NOT_CANDIDATE;
 382                         goto doreturn;
 383                 }
 384         }
 385
 386         /* initiate dobind */
 387         retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
 388
 389         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 390
 391         if ( retcode != META_SEARCH_CANDIDATE ) {
 392                 goto doreturn;
 393         }
 394
 395         /*
 396          * Rewrite the search base, if required
 397          */
 398         dc->target = mt;
 399         dc->ctx = "searchBase";
 400         switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
 401         case LDAP_SUCCESS:
 402                 break;
 403
 404         case LDAP_UNWILLING_TO_PERFORM:
 405                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 406                 rs->sr_text = "Operation not allowed";
 407                 send_ldap_result( op, rs );
 408                 retcode = META_SEARCH_ERR;
 409                 goto doreturn;
 410
 411         default:
 412
 413                 /*
 414                  * this target is no longer candidate
 415                  */
 416                 retcode = META_SEARCH_NOT_CANDIDATE;
 417                 goto doreturn;
 418         }
 419
 420         /*
 421          * Maps filter
 422          */
 423         rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
 424                         &mfilter, BACKLDAP_MAP );
 425         switch ( rc ) {
 426         case LDAP_SUCCESS:
 427                 break;
 428
 429         case LDAP_COMPARE_FALSE:
 430         default:
 431                 /*
 432                  * this target is no longer candidate
 433                  */
 434                 retcode = META_SEARCH_NOT_CANDIDATE;
 435                 goto done;
 436         }
 437
 438         /*
 439          * Maps required attributes
 440          */
 441         rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
 442                         op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
 443         if ( rc != LDAP_SUCCESS ) {
 444                 /*
 445                  * this target is no longer candidate
 446                  */
 447                 retcode = META_SEARCH_NOT_CANDIDATE;
 448                 goto done;
 449         }
 450
 451         /* should we check return values? */
 452         if ( op->ors_deref != -1 ) {
 453                 assert( msc->msc_ld != NULL );
 454                 (void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
 455                                 ( void * )&op->ors_deref );
 456         }
 457
 458         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 459                 tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
 460                 tv.tv_usec = 0;
 461                 tvp = &tv;
 462         }
 463
 464 retry:;
 465         ctrls = op->o_ctrls;
 466         if ( ldap_back_proxy_authz_ctrl( &msc->msc_bound_ndn,
 467                 mt->mt_version, &mt->mt_idassert, op, rs, &ctrls )
 468                 != LDAP_SUCCESS )
 469         {
 470                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 471                 retcode = META_SEARCH_NOT_CANDIDATE;
 472                 goto done;
 473         }
 474
 475         /*
 476          * Starts the search
 477          */
 478         assert( msc->msc_ld != NULL );
 479         rc = ldap_search_ext( msc->msc_ld,
 480                         mbase.bv_val, realscope, mfilter.bv_val,
 481                         mapped_attrs, op->ors_attrsonly,
 482                         ctrls, NULL, tvp, op->ors_slimit,
 483                         &candidates[ candidate ].sr_msgid );
 484         switch ( rc ) {
 485         case LDAP_SUCCESS:
 486                 retcode = META_SEARCH_CANDIDATE;
 487                 break;
 488
 489         case LDAP_SERVER_DOWN:
 490                 if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
 491                         nretries = 0;
 492                         /* if the identity changed, there might be need to re-authz */
 493                         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 494                         goto retry;
 495                 }
 496
 497                 if ( *mcp == NULL ) {
 498                         retcode = META_SEARCH_ERR;
 499                         break;
 500                 }
 501                 /* fall thru */
 502
 503         default:
 504                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 505                 retcode = META_SEARCH_NOT_CANDIDATE;
 506         }
 507
 508 done:;
 509         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 510
 511         if ( mapped_attrs ) {
 512                 free( mapped_attrs );
 513         }
 514         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 515                 free( mfilter.bv_val );
 516         }
 517         if ( mbase.bv_val != realbase.bv_val ) {
 518                 free( mbase.bv_val );
 519         }
 520
 521 doreturn:;
 522         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 523
 524         return retcode;
 525 }
 526
 527 int
 528 meta_back_search( Operation *op, SlapReply *rs )
 529 {
 530         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 531         metaconn_t      *mc;
 532         struct timeval  tv = { 0, 0 };
 533         time_t          stoptime = (time_t)-1;
 534         int             rc = 0, sres = LDAP_SUCCESS;
 535         char            *matched = NULL;
 536         int             last = 0, ncandidates = 0,
 537                         initial_candidates = 0, candidate_match = 0;
 538         long            i;
 539         dncookie        dc;
 540         int             is_ok = 0;
 541         void            *savepriv;
 542         SlapReply       *candidates = meta_back_candidates_get( op );
 543
 544         /*
 545          * controls are set in ldap_back_dobind()
 546          *
 547          * FIXME: in case of values return filter, we might want
 548          * to map attrs and maybe rewrite value
 549          */
 550         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_SENDERR );
 551         if ( !mc ) {
 552                 return rs->sr_err;
 553         }
 554
 555         dc.conn = op->o_conn;
 556         dc.rs = rs;
 557
 558         /*
 559          * Inits searches
 560          */
 561         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 562                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 563
 564                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 565                         continue;
 566                 }
 567
 568                 candidates[ i ].sr_matched = NULL;
 569                 candidates[ i ].sr_text = NULL;
 570                 candidates[ i ].sr_ref = NULL;
 571                 candidates[ i ].sr_ctrls = NULL;
 572         }
 573
 574         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 575                 if ( !META_IS_CANDIDATE( &candidates[ i ] )
 576                         || candidates[ i ].sr_err != LDAP_SUCCESS )
 577                 {
 578                         continue;
 579                 }
 580
 581                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 582                 {
 583                 case META_SEARCH_NOT_CANDIDATE:
 584                         break;
 585
 586                 case META_SEARCH_CANDIDATE:
 587                 case META_SEARCH_BINDING:
 588                 case META_SEARCH_NEED_BIND:
 589                         candidates[ i ].sr_type = REP_INTERMEDIATE;
 590                         ++ncandidates;
 591                         break;
 592
 593                 case META_SEARCH_ERR:
 594                         savepriv = op->o_private;
 595                         op->o_private = (void *)i;
 596                         send_ldap_result( op, rs );
 597                         op->o_private = savepriv;
 598                         rc = -1;
 599                         goto finish;
 600                 }
 601         }
 602
 603         initial_candidates = ncandidates;
 604
 605         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 606                 char    cnd[ BUFSIZ ];
 607                 int     c;
 608
 609                 for ( c = 0; c < mi->mi_ntargets; c++ ) {
 610                         if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
 611                                 cnd[ c ] = '*';
 612                         } else {
 613                                 cnd[ c ] = ' ';
 614                         }
 615                 }
 616                 cnd[ c ] = '\0';
 617
 618                 Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
 619                         "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
 620         }
 621
 622         if ( initial_candidates == 0 ) {
 623                 /* NOTE: here we are not sending any matchedDN;
 624                  * this is intended, because if the back-meta
 625                  * is serving this search request, but no valid
 626                  * candidate could be looked up, it means that
 627                  * there is a hole in the mapping of the targets
 628                  * and thus no knowledge of any remote superior
 629                  * is available */
 630                 Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
 631                         "base=\"%s\" scope=%d: "
 632                         "no candidate could be selected\n",
 633                         op->o_log_prefix, op->o_req_dn.bv_val,
 634                         op->ors_scope );
 635
 636                 /* FIXME: we're sending the first error we encounter;
 637                  * maybe we should pick the worst... */
 638                 rc = LDAP_NO_SUCH_OBJECT;
 639                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 640                         if ( META_IS_CANDIDATE( &candidates[ i ] )
 641                                 && candidates[ i ].sr_err != LDAP_SUCCESS )
 642                         {
 643                                 rc = candidates[ i ].sr_err;
 644                                 break;
 645                         }
 646                 }
 647
 648                 send_ldap_error( op, rs, rc, NULL );
 649
 650                 goto finish;
 651         }
 652
 653         /* We pull apart the ber result, stuff it into a slapd entry, and
 654          * let send_search_entry stuff it back into ber format. Slow & ugly,
 655          * but this is necessary for version matching, and for ACL processing.
 656          */
 657
 658         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 659                 stoptime = op->o_time + op->ors_tlimit;
 660         }
 661
 662         /*
 663          * In case there are no candidates, no cycle takes place...
 664          *
 665          * FIXME: we might use a queue, to better balance the load
 666          * among the candidates
 667          */
 668         for ( rc = 0; ncandidates > 0; ) {
 669                 int     gotit = 0, doabandon = 0;
 670
 671                 /* check time limit */
 672                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 673                                 && slap_get_time() > stoptime )
 674                 {
 675                         doabandon = 1;
 676                         rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 677                         savepriv = op->o_private;
 678                         op->o_private = (void *)i;
 679                         send_ldap_result( op, rs );
 680                         op->o_private = savepriv;
 681                         goto finish;
 682                 }
 683
 684                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 685                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 686                         LDAPMessage             *res = NULL, *msg;
 687
 688                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
 689                                 continue;
 690                         }
 691
 692                         if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND ) {
 693                                 meta_search_candidate_t retcode;
 694
 695                                 /* initiate dobind */
 696                                 retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
 697
 698                                 Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
 699                                         op->o_log_prefix, i, retcode );
 700
 701                                 switch ( retcode ) {
 702                                 case META_SEARCH_BINDING:
 703                                 case META_SEARCH_NEED_BIND:
 704                                         break;
 705
 706                                 case META_SEARCH_NOT_CANDIDATE:
 707                                         /*
 708                                          * When no candidates are left,
 709                                          * the outer cycle finishes
 710                                          */
 711                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 712                                         --ncandidates;
 713                                         break;
 714
 715                                 case META_SEARCH_ERR:
 716                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 717                                                 savepriv = op->o_private;
 718                                                 op->o_private = (void *)i;
 719                                                 send_ldap_result( op, rs );
 720                                                 op->o_private = savepriv;
 721                                                 goto finish;
 722                                         }
 723                                         break;
 724
 725                                 case META_SEARCH_CANDIDATE:
 726                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 727                                         switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 728                                         {
 729                                         case META_SEARCH_CANDIDATE:
 730                                                 break;
 731
 732                                                 /* means that failed but onerr == continue */
 733                                         case META_SEARCH_NOT_CANDIDATE:
 734                                         case META_SEARCH_ERR:
 735                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 736                                                 --ncandidates;
 737
 738                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
 739                                                         savepriv = op->o_private;
 740                                                         op->o_private = (void *)i;
 741                                                         send_ldap_result( op, rs );
 742                                                         op->o_private = savepriv;
 743                                                         goto finish;
 744                                                 }
 745                                                 break;
 746
 747                                         default:
 748                                                 /* impossible */
 749                                                 assert( 0 );
 750                                                 break;
 751                                         }
 752                                         break;
 753
 754                                 default:
 755                                         /* impossible */
 756                                         assert( 0 );
 757                                         break;
 758                                 }
 759                                 continue;
 760                         }
 761
 762                         /* check for abandon */
 763                         if ( op->o_abandon ) {
 764                                 break;
 765                         }
 766
 767                         /*
 768                          * FIXME: handle time limit as well?
 769                          * Note that target servers are likely
 770                          * to handle it, so at some time we'll
 771                          * get a LDAP_TIMELIMIT_EXCEEDED from
 772                          * one of them ...
 773                          */
 774                         rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
 775                                         LDAP_MSG_RECEIVED, &tv, &res );
 776                         switch ( rc ) {
 777                         case 0:
 778                                 /* FIXME: res should not need to be freed */
 779                                 assert( res == NULL );
 780                                 continue;
 781
 782                         case -1:
 783 really_bad:;
 784                                 /* something REALLY bad happened! */
 785                                 if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
 786                                         candidates[ i ].sr_type = REP_RESULT;
 787
 788                                         if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
 789                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 790                                                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 791                                                 {
 792                                                 case META_SEARCH_CANDIDATE:
 793                                                         break;
 794
 795                                                         /* means that failed but onerr == continue */
 796                                                 case META_SEARCH_NOT_CANDIDATE:
 797                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 798                                                         --ncandidates;
 799
 800                                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 801                                                                 savepriv = op->o_private;
 802                                                                 op->o_private = (void *)i;
 803                                                                 send_ldap_result( op, rs );
 804                                                                 op->o_private = savepriv;
 805                                                                 goto finish;
 806                                                         }
 807                                                         break;
 808
 809                                                 case META_SEARCH_BINDING:
 810                                                 case META_SEARCH_NEED_BIND:
 811                                                         assert( 0 );
 812
 813                                                 default:
 814                                                         rc = rs->sr_err = LDAP_OTHER;
 815                                                         goto finish;
 816                                                 }
 817                                         }
 818
 819                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 820                                                 savepriv = op->o_private;
 821                                                 op->o_private = (void *)i;
 822                                                 send_ldap_result( op, rs );
 823                                                 op->o_private = savepriv;
 824                                                 goto finish;
 825                                         }
 826                                 }
 827
 828                                 /*
 829                                  * When no candidates are left,
 830                                  * the outer cycle finishes
 831                                  */
 832                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 833                                 --ncandidates;
 834                                 rs->sr_err = candidates[ i ].sr_err;
 835                                 continue;
 836
 837                         default:
 838                                 /* only touch when activity actually took place... */
 839                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 840                                         msc->msc_time = op->o_time;
 841                                 }
 842                                 break;
 843                         }
 844
 845                         for ( msg = ldap_first_message( msc->msc_ld, res );
 846                                 msg != NULL;
 847                                 msg = ldap_next_message( msc->msc_ld, msg ) )
 848                         {
 849                                 rc = ldap_msgtype( msg );
 850                                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 851                                         LDAPMessage     *e;
 852
 853                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
 854                                                 /* don't retry any more... */
 855                                                 candidates[ i ].sr_type = REP_RESULT;
 856                                         }
 857
 858                                         is_ok++;
 859
 860                                         e = ldap_first_entry( msc->msc_ld, msg );
 861                                         savepriv = op->o_private;
 862                                         op->o_private = (void *)i;
 863                                         rs->sr_err = meta_send_entry( op, rs, mc, i, e );
 864
 865                                         switch ( rs->sr_err ) {
 866                                         case LDAP_SIZELIMIT_EXCEEDED:
 867                                                 savepriv = op->o_private;
 868                                                 op->o_private = (void *)i;
 869                                                 send_ldap_result( op, rs );
 870                                                 op->o_private = savepriv;
 871                                                 rs->sr_err = LDAP_SUCCESS;
 872                                                 ldap_msgfree( res );
 873                                                 res = NULL;
 874                                                 goto finish;
 875
 876                                         case LDAP_UNAVAILABLE:
 877                                                 rs->sr_err = LDAP_OTHER;
 878                                                 ldap_msgfree( res );
 879                                                 res = NULL;
 880                                                 goto finish;
 881                                         }
 882                                         op->o_private = savepriv;
 883
 884                                         /* don't wait any longer... */
 885                                         gotit = 1;
 886                                         tv.tv_sec = 0;
 887                                         tv.tv_usec = 0;
 888
 889                                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 890                                         char            **references = NULL;
 891                                         int             cnt;
 892
 893                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
 894                                                 /* don't retry any more... */
 895                                                 candidates[ i ].sr_type = REP_RESULT;
 896                                         }
 897
 898                                         is_ok++;
 899
 900                                         rc = ldap_parse_reference( msc->msc_ld, msg,
 901                                                         &references, &rs->sr_ctrls, 0 );
 902
 903                                         if ( rc != LDAP_SUCCESS ) {
 904                                                 continue;
 905                                         }
 906
 907                                         if ( references == NULL ) {
 908                                                 continue;
 909                                         }
 910
 911 #ifdef ENABLE_REWRITE
 912                                         dc.ctx = "referralDN";
 913 #else /* ! ENABLE_REWRITE */
 914                                         dc.tofrom = 0;
 915                                         dc.normalized = 0;
 916 #endif /* ! ENABLE_REWRITE */
 917
 918                                         /* FIXME: merge all and return at the end */
 919                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 920                                                 ;
 921
 922                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
 923
 924                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 925                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 926                                         }
 927                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 928
 929                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
 930
 931                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
 932                                                 /* ignore return value by now */
 933                                                 savepriv = op->o_private;
 934                                                 op->o_private = (void *)i;
 935                                                 ( void )send_search_reference( op, rs );
 936                                                 op->o_private = savepriv;
 937
 938                                                 ber_bvarray_free( rs->sr_ref );
 939                                                 rs->sr_ref = NULL;
 940                                         }
 941
 942                                         /* cleanup */
 943                                         if ( references ) {
 944                                                 ber_memvfree( (void **)references );
 945                                         }
 946
 947                                         if ( rs->sr_ctrls ) {
 948                                                 ldap_controls_free( rs->sr_ctrls );
 949                                                 rs->sr_ctrls = NULL;
 950                                         }
 951
 952                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
 953                                         char            buf[ SLAP_TEXT_BUFLEN ];
 954                                         char            **references = NULL;
 955
 956                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
 957                                                 /* don't retry any more... */
 958                                                 candidates[ i ].sr_type = REP_RESULT;
 959                                         }
 960
 961                                         /* NOTE: ignores response controls
 962                                          * (and intermediate response controls
 963                                          * as well, except for those with search
 964                                          * references); this may not be correct,
 965                                          * but if they're not ignored then
 966                                          * back-meta would need to merge them
 967                                          * consistently (think of pagedResults...)
 968                                          */
 969                                         /* FIXME: response controls? */
 970                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
 971                                                 msg,
 972                                                 &candidates[ i ].sr_err,
 973                                                 (char **)&candidates[ i ].sr_matched,
 974                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
 975                                                 &references,
 976                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
 977                                                 0 );
 978                                         if ( rs->sr_err != LDAP_SUCCESS ) {
 979                                                 ldap_get_option( msc->msc_ld,
 980                                                         LDAP_OPT_RESULT_CODE,
 981                                                         &rs->sr_err );
 982                                                 sres = slap_map_api2result( rs );
 983                                                 candidates[ i ].sr_type = REP_RESULT;
 984                                                 ldap_msgfree( res );
 985                                                 res = NULL;
 986                                                 goto really_bad;
 987                                         }
 988
 989                                         /* massage matchedDN if need be */
 990                                         if ( candidates[ i ].sr_matched != NULL ) {
 991                                                 struct berval   match, mmatch;
 992
 993                                                 ber_str2bv( candidates[ i ].sr_matched,
 994                                                         0, 0, &match );
 995                                                 candidates[ i ].sr_matched = NULL;
 996
 997                                                 dc.ctx = "matchedDN";
 998                                                 dc.target = mi->mi_targets[ i ];
 999                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1000                                                         if ( mmatch.bv_val == match.bv_val ) {
1001                                                                 candidates[ i ].sr_matched
1002                                                                         = ch_strdup( mmatch.bv_val );
1003
1004                                                         } else {
1005                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1006                                                         }
1007
1008                                                         candidate_match++;
1009                                                 }
1010                                                 ldap_memfree( match.bv_val );
1011                                         }
1012
1013                                         /* add references to array */
1014                                         if ( references ) {
1015                                                 BerVarray       sr_ref;
1016                                                 int             cnt;
1017
1018                                                 for ( cnt = 0; references[ cnt ]; cnt++ )
1019                                                         ;
1020
1021                                                 sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1022
1023                                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
1024                                                         ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1025                                                 }
1026                                                 BER_BVZERO( &sr_ref[ cnt ] );
1027
1028                                                 ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1029
1030                                                 /* cleanup */
1031                                                 ber_memvfree( (void **)references );
1032
1033                                                 if ( rs->sr_v2ref == NULL ) {
1034                                                         rs->sr_v2ref = sr_ref;
1035
1036                                                 } else {
1037                                                         for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1038                                                                 ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1039                                                         }
1040                                                         ber_memfree( sr_ref );
1041                                                 }
1042                                         }
1043
1044                                         rs->sr_err = candidates[ i ].sr_err;
1045                                         sres = slap_map_api2result( rs );
1046
1047                                         if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1048                                                 snprintf( buf, sizeof( buf ),
1049                                                         "%s meta_back_search[%ld] "
1050                                                         "match=\"%s\" err=%ld",
1051                                                         op->o_log_prefix, i,
1052                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1053                                                         (long) candidates[ i ].sr_err );
1054                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1055                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1056
1057                                                 } else {
1058                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1059                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1060                                                 }
1061                                         }
1062
1063                                         switch ( sres ) {
1064                                         case LDAP_NO_SUCH_OBJECT:
1065                                                 /* is_ok is touched any time a valid
1066                                                  * (even intermediate) result is
1067                                                  * returned; as a consequence, if
1068                                                  * a candidate returns noSuchObject
1069                                                  * it is ignored and the candidate
1070                                                  * is simply demoted. */
1071                                                 if ( is_ok ) {
1072                                                         sres = LDAP_SUCCESS;
1073                                                 }
1074                                                 break;
1075
1076                                         case LDAP_SUCCESS:
1077                                         case LDAP_REFERRAL:
1078                                                 is_ok++;
1079                                                 break;
1080
1081                                         case LDAP_SIZELIMIT_EXCEEDED:
1082                                                 /* if a target returned sizelimitExceeded
1083                                                  * and the entry count is equal to the
1084                                                  * proxy's limit, the target would have
1085                                                  * returned more, and the error must be
1086                                                  * propagated to the client; otherwise,
1087                                                  * the target enforced a limit lower
1088                                                  * than what requested by the proxy;
1089                                                  * ignore it */
1090                                                 if ( rs->sr_nentries == op->ors_slimit
1091                                                         || META_BACK_ONERR_STOP( mi ) )
1092                                                 {
1093                                                         savepriv = op->o_private;
1094                                                         op->o_private = (void *)i;
1095                                                         send_ldap_result( op, rs );
1096                                                         op->o_private = savepriv;
1097                                                         ldap_msgfree( res );
1098                                                         res = NULL;
1099                                                         goto finish;
1100                                                 }
1101                                                 break;
1102
1103                                         default:
1104                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1105                                                         savepriv = op->o_private;
1106                                                         op->o_private = (void *)i;
1107                                                         send_ldap_result( op, rs );
1108                                                         op->o_private = savepriv;
1109                                                         ldap_msgfree( res );
1110                                                         res = NULL;
1111                                                         goto finish;
1112                                                 }
1113                                                 break;
1114                                         }
1115
1116                                         last = i;
1117                                         rc = 0;
1118
1119                                         /*
1120                                          * When no candidates are left,
1121                                          * the outer cycle finishes
1122                                          */
1123                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1124                                         --ncandidates;
1125
1126                                 } else if ( rc == LDAP_RES_BIND ) {
1127                                         meta_search_candidate_t retcode;
1128
1129                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1130                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1131                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1132                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1133                                         }
1134
1135                                         switch ( retcode ) {
1136                                         case META_SEARCH_CANDIDATE:
1137                                                 break;
1138
1139                                                 /* means that failed but onerr == continue */
1140                                         case META_SEARCH_NOT_CANDIDATE:
1141                                         case META_SEARCH_ERR:
1142                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1143                                                 --ncandidates;
1144
1145                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1146                                                         savepriv = op->o_private;
1147                                                         op->o_private = (void *)i;
1148                                                         send_ldap_result( op, rs );
1149                                                         op->o_private = savepriv;
1150                                                         ldap_msgfree( res );
1151                                                         res = NULL;
1152                                                         goto finish;
1153                                                 }
1154                                                 break;
1155
1156                                         default:
1157                                                 assert( 0 );
1158                                                 break;
1159                                         }
1160
1161                                 } else {
1162                                         assert( 0 );
1163                                         ldap_msgfree( res );
1164                                         res = NULL;
1165                                         goto really_bad;
1166                                 }
1167                         }
1168
1169                         ldap_msgfree( res );
1170                         res = NULL;
1171                 }
1172
1173                 /* check for abandon */
1174                 if ( op->o_abandon || doabandon ) {
1175                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1176                                 if ( candidates[ i ].sr_msgid >= 0 ) {
1177                                         if ( META_IS_BINDING( &candidates[ i ] ) ) {
1178                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1179                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1180                                                         /* if still binding, destroy */
1181                                                         ldap_unbind_ext( mc->mc_conns[ i ].msc_ld, NULL, NULL );
1182                                                         mc->mc_conns[ i ].msc_ld = NULL;
1183                                                         LDAP_BACK_CONN_BINDING_CLEAR( &mc->mc_conns[ i ] );
1184                                                 }
1185                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1186                                                 META_BINDING_CLEAR( &candidates[ i ] );
1187
1188                                         } else {
1189                                                 (void)meta_back_cancel( mc, op, rs,
1190                                                         candidates[ i ].sr_msgid, i,
1191                                                         LDAP_BACK_DONTSEND );
1192                                         }
1193
1194                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1195                                 }
1196                         }
1197
1198                         if ( op->o_abandon ) {
1199                                 rc = SLAPD_ABANDON;
1200                                 /* let send_ldap_result play cleanup handlers (ITS#4645) */
1201                                 break;
1202                         }
1203                 }
1204
1205                 /* if no entry was found during this loop,
1206                  * set a minimal timeout */
1207                 if ( gotit == 0 ) {
1208                         /* make the entire wait last
1209                          * LDAP_BACK_RESULT_UTIMEOUT at worst */
1210                         tv.tv_sec = 0;
1211                         tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1212                         ldap_pvt_thread_yield();
1213                 }
1214         }
1215
1216         if ( rc == -1 ) {
1217                 /*
1218                  * FIXME: need a better strategy to handle errors
1219                  */
1220                 if ( mc ) {
1221                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1222                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1223                                 LDAP_BACK_SENDERR );
1224                 } else {
1225                         rc = rs->sr_err;
1226                 }
1227                 goto finish;
1228         }
1229
1230         /*
1231          * Rewrite the matched portion of the search base, if required
1232          *
1233          * FIXME: only the last one gets caught!
1234          */
1235         savepriv = op->o_private;
1236         op->o_private = (void *)(long)mi->mi_ntargets;
1237         if ( candidate_match > 0 ) {
1238                 struct berval   pmatched = BER_BVNULL;
1239
1240                 /* we use the first one */
1241                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1242                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1243                                         && candidates[ i ].sr_matched != NULL )
1244                         {
1245                                 struct berval   bv, pbv;
1246                                 int             rc;
1247
1248                                 /* if we got success, and this target
1249                                  * returned noSuchObject, and its suffix
1250                                  * is a superior of the searchBase,
1251                                  * ignore the matchedDN */
1252                                 if ( sres == LDAP_SUCCESS
1253                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1254                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1255                                 {
1256                                         free( (char *)candidates[ i ].sr_matched );
1257                                         candidates[ i ].sr_matched = NULL;
1258                                         continue;
1259                                 }
1260
1261                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1262                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1263
1264                                 if ( rc == LDAP_SUCCESS ) {
1265
1266                                         /* NOTE: if they all are superiors
1267                                          * of the baseDN, the shorter is also
1268                                          * superior of the longer... */
1269                                         if ( pbv.bv_len > pmatched.bv_len ) {
1270                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1271                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1272                                                 }
1273                                                 pmatched = pbv;
1274                                                 op->o_private = (void *)i;
1275
1276                                         } else {
1277                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1278                                         }
1279                                 }
1280
1281                                 if ( candidates[ i ].sr_matched != NULL ) {
1282                                         free( (char *)candidates[ i ].sr_matched );
1283                                         candidates[ i ].sr_matched = NULL;
1284                                 }
1285                         }
1286                 }
1287
1288                 if ( !BER_BVISNULL( &pmatched ) ) {
1289                         matched = pmatched.bv_val;
1290                 }
1291
1292         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1293                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1294         }
1295
1296 #if 0
1297         {
1298                 char    buf[BUFSIZ];
1299                 char    cnd[BUFSIZ];
1300                 int     i;
1301
1302                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1303                         if ( META_IS_CANDIDATE( &candidates[ i ] ) ) {
1304                                 cnd[ i ] = '*';
1305                         } else {
1306                                 cnd[ i ] = ' ';
1307                         }
1308                 }
1309                 cnd[ i ] = '\0';
1310
1311                 snprintf( buf, sizeof( buf ), "%s meta_back_search: is_scope=%d is_ok=%d cnd=\"%s\"\n",
1312                         op->o_log_prefix, initial_candidates, is_ok, cnd );
1313
1314                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1315         }
1316 #endif
1317
1318         /*
1319          * In case we returned at least one entry, we return LDAP_SUCCESS
1320          * otherwise, the latter error code we got
1321          *
1322          * FIXME: we should handle error codes and return the more
1323          * important/reasonable
1324          */
1325
1326         if ( sres == LDAP_SUCCESS && rs->sr_v2ref ) {
1327                 sres = LDAP_REFERRAL;
1328         }
1329         rs->sr_err = sres;
1330         rs->sr_matched = matched;
1331         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1332         send_ldap_result( op, rs );
1333         op->o_private = savepriv;
1334         rs->sr_matched = NULL;
1335         rs->sr_ref = NULL;
1336
1337 finish:;
1338         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1339                 op->o_tmpfree( matched, op->o_tmpmemctx );
1340         }
1341
1342         if ( rs->sr_v2ref ) {
1343                 ber_bvarray_free( rs->sr_v2ref );
1344         }
1345
1346         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1347                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1348                         continue;
1349                 }
1350
1351                 if ( mc && META_IS_BINDING( &candidates[ i ] ) ) {
1352                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1353                         if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1354                                 LDAP_BACK_CONN_BINDING_CLEAR( &mc->mc_conns[ i ] );
1355
1356                                 assert( candidates[ i ].sr_msgid >= 0 );
1357                                 assert( mc->mc_conns[ i ].msc_ld != NULL );
1358
1359                                 /* if still binding, destroy */
1360                                 ldap_unbind_ext( mc->mc_conns[ i ].msc_ld, NULL, NULL );
1361                                 mc->mc_conns[ i ].msc_ld = NULL;
1362                         }
1363                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1364                         META_BINDING_CLEAR( &candidates[ i ] );
1365                 }
1366
1367                 if ( candidates[ i ].sr_matched ) {
1368                         free( (char *)candidates[ i ].sr_matched );
1369                         candidates[ i ].sr_matched = NULL;
1370                 }
1371
1372                 if ( candidates[ i ].sr_text ) {
1373                         ldap_memfree( (char *)candidates[ i ].sr_text );
1374                         candidates[ i ].sr_text = NULL;
1375                 }
1376
1377                 if ( candidates[ i ].sr_ref ) {
1378                         ber_bvarray_free( candidates[ i ].sr_ref );
1379                         candidates[ i ].sr_ref = NULL;
1380                 }
1381
1382                 if ( candidates[ i ].sr_ctrls ) {
1383                         ldap_controls_free( candidates[ i ].sr_ctrls );
1384                         candidates[ i ].sr_ctrls = NULL;
1385                 }
1386
1387                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1388                         meta_back_quarantine( op, &candidates[ i ], i );
1389                 }
1390
1391                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1392                  * one contacted target never responded, invalidate the connection
1393                  * NOTE: should we quarantine the target as well?  right now, the connection
1394                  * is invalidated; the next time it will be recreated and the target
1395                  * will be quarantined if it cannot be contacted */
1396                 if ( mi->mi_idle_timeout != 0
1397                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1398                         && op->o_time > mc->mc_conns[ i ].msc_time )
1399                 {
1400                         /* don't let anyone else use this expired connection */
1401                         LDAP_BACK_CONN_TAINTED_SET( mc );
1402                 }
1403         }
1404
1405         if ( mc ) {
1406                 meta_back_release_conn( op, mc );
1407         }
1408
1409         return rs->sr_err;
1410 }
1411
1412 static int
1413 meta_send_entry(
1414         Operation       *op,
1415         SlapReply       *rs,
1416         metaconn_t      *mc,
1417         int             target,
1418         LDAPMessage     *e )
1419 {
1420         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1421         struct berval           a, mapped;
1422         Entry                   ent = { 0 };
1423         BerElement              ber = *e->lm_ber;
1424         Attribute               *attr, **attrp;
1425         struct berval           bdn,
1426                                 dn = BER_BVNULL;
1427         const char              *text;
1428         dncookie                dc;
1429         int                     rc;
1430
1431         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1432                 return LDAP_DECODING_ERROR;
1433         }
1434
1435         /*
1436          * Rewrite the dn of the result, if needed
1437          */
1438         dc.target = mi->mi_targets[ target ];
1439         dc.conn = op->o_conn;
1440         dc.rs = rs;
1441         dc.ctx = "searchResult";
1442
1443         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1444         if ( rs->sr_err != LDAP_SUCCESS) {
1445                 return rs->sr_err;
1446         }
1447
1448         /*
1449          * Note: this may fail if the target host(s) schema differs
1450          * from the one known to the meta, and a DN with unknown
1451          * attributes is returned.
1452          *
1453          * FIXME: should we log anything, or delegate to dnNormalize?
1454          */
1455         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1456                 op->o_tmpmemctx );
1457         if ( dn.bv_val != bdn.bv_val ) {
1458                 free( dn.bv_val );
1459         }
1460         BER_BVZERO( &dn );
1461
1462         if ( rc != LDAP_SUCCESS ) {
1463                 return LDAP_INVALID_DN_SYNTAX;
1464         }
1465
1466         /*
1467          * cache dn
1468          */
1469         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1470                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1471                                 &ent.e_nname, target );
1472         }
1473
1474         attrp = &ent.e_attrs;
1475
1476         dc.ctx = "searchAttrDN";
1477         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1478                 int                             last = 0;
1479                 slap_syntax_validate_func       *validate;
1480                 slap_syntax_transform_func      *pretty;
1481
1482                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1483                                 &a, &mapped, BACKLDAP_REMAP );
1484                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1485                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1486                         continue;
1487                 }
1488                 attr = attr_alloc( NULL );
1489                 if ( attr == NULL ) {
1490                         continue;
1491                 }
1492                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1493                                 != LDAP_SUCCESS) {
1494                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1495                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1496                         {
1497                                 char    buf[ SLAP_TEXT_BUFLEN ];
1498
1499                                 snprintf( buf, sizeof( buf ),
1500                                         "%s meta_send_entry(\"%s\"): "
1501                                         "slap_bv2undef_ad(%s): %s\n",
1502                                         op->o_log_prefix, ent.e_name.bv_val,
1503                                         mapped.bv_val, text );
1504
1505                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1506                                 attr_free( attr );
1507                                 continue;
1508                         }
1509                 }
1510
1511                 /* no subschemaSubentry */
1512                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1513                         || attr->a_desc == slap_schema.si_ad_entryDN )
1514                 {
1515
1516                         /*
1517                          * We eat target's subschemaSubentry because
1518                          * a search for this value is likely not
1519                          * to resolve to the appropriate backend;
1520                          * later, the local subschemaSubentry is
1521                          * added.
1522                          *
1523                          * We also eat entryDN because the frontend
1524                          * will reattach it without checking if already
1525                          * present...
1526                          */
1527                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1528
1529                         attr_free(attr);
1530                         continue;
1531                 }
1532
1533                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1534                                 || attr->a_vals == NULL )
1535                 {
1536                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1537
1538                 } else {
1539                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1540                                 ;
1541                 }
1542
1543                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1544                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1545
1546                 if ( !validate && !pretty ) {
1547                         attr_free( attr );
1548                         goto next_attr;
1549                 }
1550
1551                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1552                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1553                 {
1554                         struct berval   *bv;
1555
1556                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1557                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1558                                                 bv, &mapped, BACKLDAP_REMAP );
1559                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1560                                         free( bv->bv_val );
1561                                         BER_BVZERO( bv );
1562                                         if ( --last < 0 ) {
1563                                                 break;
1564                                         }
1565                                         *bv = attr->a_vals[ last ];
1566                                         BER_BVZERO( &attr->a_vals[ last ] );
1567                                         bv--;
1568
1569                                 } else if ( mapped.bv_val != bv->bv_val ) {
1570                                         free( bv->bv_val );
1571                                         ber_dupbv( bv, &mapped );
1572                                 }
1573                         }
1574                 /*
1575                  * It is necessary to try to rewrite attributes with
1576                  * dn syntax because they might be used in ACLs as
1577                  * members of groups; since ACLs are applied to the
1578                  * rewritten stuff, no dn-based subecj clause could
1579                  * be used at the ldap backend side (see
1580                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1581                  * The problem can be overcome by moving the dn-based
1582                  * ACLs to the target directory server, and letting
1583                  * everything pass thru the ldap backend.
1584                  */
1585                 } else {
1586                         int     i;
1587
1588                         if ( attr->a_desc->ad_type->sat_syntax ==
1589                                 slap_schema.si_syn_distinguishedName )
1590                         {
1591                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1592
1593                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1594                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1595
1596                         }
1597
1598                         for ( i = 0; i < last; i++ ) {
1599                                 struct berval   pval;
1600                                 int             rc;
1601
1602                                 if ( pretty ) {
1603                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1604                                                 &attr->a_vals[i], &pval, NULL );
1605
1606                                 } else {
1607                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1608                                                 &attr->a_vals[i] );
1609                                 }
1610
1611                                 if ( rc ) {
1612                                         LBER_FREE( attr->a_vals[i].bv_val );
1613                                         if ( --last == i ) {
1614                                                 BER_BVZERO( &attr->a_vals[ i ] );
1615                                                 break;
1616                                         }
1617                                         attr->a_vals[i] = attr->a_vals[last];
1618                                         BER_BVZERO( &attr->a_vals[last] );
1619                                         i--;
1620                                         continue;
1621                                 }
1622
1623                                 if ( pretty ) {
1624                                         LBER_FREE( attr->a_vals[i].bv_val );
1625                                         attr->a_vals[i] = pval;
1626                                 }
1627                         }
1628
1629                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
1630                                 attr_free( attr );
1631                                 goto next_attr;
1632                         }
1633                 }
1634
1635                 if ( last && attr->a_desc->ad_type->sat_equality &&
1636                         attr->a_desc->ad_type->sat_equality->smr_normalize )
1637                 {
1638                         int i;
1639
1640                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
1641                         for ( i = 0; i<last; i++ ) {
1642                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
1643                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
1644                                         attr->a_desc->ad_type->sat_syntax,
1645                                         attr->a_desc->ad_type->sat_equality,
1646                                         &attr->a_vals[i], &attr->a_nvals[i],
1647                                         NULL );
1648                         }
1649                         BER_BVZERO( &attr->a_nvals[i] );
1650
1651                 } else {
1652                         attr->a_nvals = attr->a_vals;
1653                 }
1654
1655                 *attrp = attr;
1656                 attrp = &attr->a_next;
1657 next_attr:;
1658         }
1659         rs->sr_entry = &ent;
1660         rs->sr_attrs = op->ors_attrs;
1661         rs->sr_flags = 0;
1662         rs->sr_err = LDAP_SUCCESS;
1663         rc = send_search_entry( op, rs );
1664         switch ( rc ) {
1665         case LDAP_UNAVAILABLE:
1666                 rc = LDAP_OTHER;
1667                 break;
1668         }
1669         rs->sr_entry = NULL;
1670         rs->sr_attrs = NULL;
1671
1672         if ( !BER_BVISNULL( &ent.e_name ) ) {
1673                 free( ent.e_name.bv_val );
1674                 BER_BVZERO( &ent.e_name );
1675         }
1676         if ( !BER_BVISNULL( &ent.e_nname ) ) {
1677                 free( ent.e_nname.bv_val );
1678                 BER_BVZERO( &ent.e_nname );
1679         }
1680         entry_clean( &ent );
1681
1682         return rc;
1683 }
1684