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 1999-2007 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 "lutil.h"
  32 #include "slap.h"
  33 #include "../back-ldap/back-ldap.h"
  34 #include "back-meta.h"
  35 #undef ldap_debug       /* silence a warning in ldap-int.h */
  36 #include "ldap_log.h"
  37 #include "../../../libraries/libldap/ldap-int.h"
  38
  39 /* IGNORE means that target does not (no longer) participate
  40  * in the search;
  41  * NOTREADY means the search on that target has not been initialized yet
  42  */
  43 #define META_MSGID_IGNORE       (-1)
  44 #define META_MSGID_NEED_BIND    (-2)
  45
  46 static int
  47 meta_send_entry(
  48         Operation       *op,
  49         SlapReply       *rs,
  50         metaconn_t      *mc,
  51         int             i,
  52         LDAPMessage     *e );
  53
  54 typedef enum meta_search_candidate_t {
  55         META_SEARCH_UNDEFINED = -2,
  56         META_SEARCH_ERR = -1,
  57         META_SEARCH_NOT_CANDIDATE,
  58         META_SEARCH_CANDIDATE,
  59         META_SEARCH_BINDING,
  60         META_SEARCH_NEED_BIND
  61 } meta_search_candidate_t;
  62
  63 /*
  64  * meta_search_dobind_init()
  65  *
  66  * initiates bind for a candidate target of a search.
  67  */
  68 static meta_search_candidate_t
  69 meta_search_dobind_init(
  70         Operation               *op,
  71         SlapReply               *rs,
  72         metaconn_t              **mcp,
  73         int                     candidate,
  74         SlapReply               *candidates )
  75 {
  76         metaconn_t              *mc = *mcp;
  77         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
  78         metatarget_t            *mt = mi->mi_targets[ candidate ];
  79         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
  80
  81         struct berval           binddn = msc->msc_bound_ndn,
  82                                 cred = msc->msc_cred;
  83         int                     method;
  84
  85         int                     rc;
  86
  87         meta_search_candidate_t retcode;
  88
  89         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n",
  90                 op->o_log_prefix, candidate, 0 );
  91
  92         /*
  93          * all the targets are already bound as pseudoroot
  94          */
  95         if ( mc->mc_authz_target == META_BOUND_ALL ) {
  96                 return META_SEARCH_CANDIDATE;
  97         }
  98
  99         retcode = META_SEARCH_BINDING;
 100         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 101         if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 102                 /* already bound (or anonymous) */
 103
 104 #ifdef DEBUG_205
 105                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 106                 int     bound = 0;
 107
 108                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 109                         bound = 1;
 110                 }
 111
 112                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p%s DN=\"%s\"",
 113                         (void *)mc, (void *)msc->msc_ld,
 114                         bound ? " bound" : " anonymous",
 115                         bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
 116                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 117                         op->o_log_prefix, candidate, buf );
 118 #endif /* DEBUG_205 */
 119
 120                 retcode = META_SEARCH_CANDIDATE;
 121
 122         } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
 123                 /* another thread is binding the target for this conn; wait */
 124
 125 #ifdef DEBUG_205
 126                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 127
 128                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p needbind",
 129                         (void *)mc, (void *)msc->msc_ld );
 130                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 131                         op->o_log_prefix, candidate, buf );
 132 #endif /* DEBUG_205 */
 133
 134                 candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
 135                 retcode = META_SEARCH_NEED_BIND;
 136
 137         } else {
 138                 /* we'll need to bind the target for this conn */
 139
 140 #ifdef DEBUG_205
 141                 char buf[ SLAP_TEXT_BUFLEN ];
 142
 143                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p binding",
 144                         (void *)mc, (void *)msc->msc_ld );
 145                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 146                         op->o_log_prefix, candidate, buf );
 147 #endif /* DEBUG_205 */
 148
 149                 if ( msc->msc_ld == NULL ) {
 150                         /* for some reason (e.g. because formerly in "binding"
 151                          * state, with eventual connection expiration or invalidation)
 152                          * it was not initialized as expected */
 153
 154                         Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p ld=NULL\n",
 155                                 op->o_log_prefix, candidate, (void *)mc );
 156
 157                         rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
 158                                 LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND, 0 );
 159                         switch ( rc ) {
 160                         case LDAP_SUCCESS:
 161                                 assert( msc->msc_ld != NULL );
 162                                 break;
 163
 164                         case LDAP_SERVER_DOWN:
 165                         case LDAP_UNAVAILABLE:
 166                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 167                                 goto down;
 168
 169                         default:
 170                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 171                                 goto other;
 172                         }
 173                 }
 174
 175                 LDAP_BACK_CONN_BINDING_SET( msc );
 176         }
 177
 178         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 179
 180         if ( retcode != META_SEARCH_BINDING ) {
 181                 return retcode;
 182         }
 183
 184         /* NOTE: this obsoletes pseudorootdn */
 185         if ( op->o_conn != NULL &&
 186                 !op->o_do_not_cache &&
 187                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 188                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 189                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 190         {
 191                 rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
 192                 if ( rc != LDAP_SUCCESS ) {
 193                         goto down;
 194                 }
 195
 196                 /* NOTE: we copy things here, even if bind didn't succeed yet,
 197                  * because the connection is not shared until bind is over */
 198                 if ( !BER_BVISNULL( &binddn ) ) {
 199                         ber_bvreplace( &msc->msc_bound_ndn, &binddn );
 200                         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &cred ) ) {
 201                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 202                                         memset( msc->msc_cred.bv_val, 0,
 203                                                 msc->msc_cred.bv_len );
 204                                 }
 205                                 ber_bvreplace( &msc->msc_cred, &cred );
 206                         }
 207                 }
 208
 209                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 210                         /* apparently, idassert was configured with SASL bind,
 211                          * so bind occurred inside meta_back_proxy_authz_cred() */
 212                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 213                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 214                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 215                         return META_SEARCH_CANDIDATE;
 216                 }
 217
 218                 /* paranoid */
 219                 switch ( method ) {
 220                 case LDAP_AUTH_NONE:
 221                 case LDAP_AUTH_SIMPLE:
 222                         /* do a simple bind with binddn, cred */
 223                         break;
 224
 225                 default:
 226                         assert( 0 );
 227                         break;
 228                 }
 229         }
 230
 231         assert( msc->msc_ld != NULL );
 232
 233 retry:;
 234         rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
 235                         NULL, NULL, &candidates[ candidate ].sr_msgid );
 236
 237 #ifdef DEBUG_205
 238         {
 239                 char buf[ SLAP_TEXT_BUFLEN ];
 240
 241                 snprintf( buf, sizeof( buf ), "meta_search_dobind_init[%d] mc=%p ld=%p rc=%d",
 242                         candidate, (void *)mc, (void *)mc->mc_conns[ candidate ].msc_ld, rc );
 243                 Debug( LDAP_DEBUG_ANY, "### %s %s\n",
 244                         op->o_log_prefix, buf, 0 );
 245         }
 246 #endif /* DEBUG_205 */
 247
 248         switch ( rc ) {
 249         case LDAP_SUCCESS:
 250                 assert( candidates[ candidate ].sr_msgid >= 0 );
 251                 META_BINDING_SET( &candidates[ candidate ] );
 252                 return META_SEARCH_BINDING;
 253
 254         case LDAP_SERVER_DOWN:
 255 down:;
 256                 /* This is the worst thing that could happen:
 257                  * the search will wait until the retry is over. */
 258                 if ( !META_IS_RETRYING( &candidates[ candidate ] ) ) {
 259                         META_RETRYING_SET( &candidates[ candidate ] );
 260
 261                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 262
 263                         assert( mc->mc_refcnt > 0 );
 264                         if ( StatslogTest( LDAP_DEBUG_ANY ) ) {
 265                                 char    buf[ SLAP_TEXT_BUFLEN ];
 266
 267                                 /* this lock is required; however,
 268                                  * it's invoked only when logging is on */
 269                                 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 270                                 snprintf( buf, sizeof( buf ),
 271                                         "retrying URI=\"%s\" DN=\"%s\"",
 272                                         mt->mt_uri,
 273                                         BER_BVISNULL( &msc->msc_bound_ndn ) ?
 274                                                 "" : msc->msc_bound_ndn.bv_val );
 275                                 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 276
 277                                 Debug( LDAP_DEBUG_ANY,
 278                                         "%s meta_search_dobind_init[%d]: %s.\n",
 279                                         op->o_log_prefix, candidate, buf );
 280                         }
 281
 282                         meta_clear_one_candidate( op, mc, candidate );
 283                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 284
 285                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 286
 287                         /* mc here must be the regular mc, reset and ready for init */
 288                         rc = meta_back_init_one_conn( op, rs, mc, candidate,
 289                                 LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
 290
 291                         if ( rc == LDAP_SUCCESS ) {
 292                                 LDAP_BACK_CONN_BINDING_SET( msc );
 293                         }
 294
 295                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 296
 297                         if ( rc == LDAP_SUCCESS ) {
 298                                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 299                                 goto retry;
 300                         }
 301                 }
 302
 303                 if ( *mcp == NULL ) {
 304                         retcode = META_SEARCH_ERR;
 305                         rs->sr_err = LDAP_UNAVAILABLE;
 306                         break;
 307                 }
 308                 /* fall thru */
 309
 310         default:
 311 other:;
 312                 rs->sr_err = rc;
 313                 rc = slap_map_api2result( rs );
 314
 315                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 316                 meta_clear_one_candidate( op, mc, candidate );
 317                 candidates[ candidate ].sr_err = rc;
 318                 if ( META_BACK_ONERR_STOP( mi ) ) {
 319                         LDAP_BACK_CONN_TAINTED_SET( mc );
 320                         meta_back_release_conn_lock( mi, mc, 0 );
 321                         *mcp = NULL;
 322                         rs->sr_err = rc;
 323
 324                         retcode = META_SEARCH_ERR;
 325
 326                 } else {
 327                         retcode = META_SEARCH_NOT_CANDIDATE;
 328                 }
 329                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 330                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 331                 break;
 332         }
 333
 334         return retcode;
 335 }
 336
 337 static meta_search_candidate_t
 338 meta_search_dobind_result(
 339         Operation               *op,
 340         SlapReply               *rs,
 341         metaconn_t              **mcp,
 342         int                     candidate,
 343         SlapReply               *candidates,
 344         LDAPMessage             *res )
 345 {
 346         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 347         metaconn_t              *mc = *mcp;
 348         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 349
 350         meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
 351         int                     rc;
 352
 353         assert( msc->msc_ld != NULL );
 354
 355         /* FIXME: matched? referrals? response controls? */
 356         rc = ldap_parse_result( msc->msc_ld, res,
 357                 &candidates[ candidate ].sr_err,
 358                 NULL, NULL, NULL, NULL, 0 );
 359         if ( rc != LDAP_SUCCESS ) {
 360                 candidates[ candidate ].sr_err = rc;
 361
 362         } else {
 363                 rc = slap_map_api2result( &candidates[ candidate ] );
 364         }
 365
 366         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 367         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 368         if ( rc != LDAP_SUCCESS ) {
 369                 meta_clear_one_candidate( op, mc, candidate );
 370                 candidates[ candidate ].sr_err = rc;
 371                 if ( META_BACK_ONERR_STOP( mi ) ) {
 372                         LDAP_BACK_CONN_TAINTED_SET( mc );
 373                         meta_back_release_conn_lock( mi, mc, 0 );
 374                         *mcp = NULL;
 375                         retcode = META_SEARCH_ERR;
 376                         rs->sr_err = rc;
 377                 }
 378
 379         } else {
 380                 /* FIXME: check if bound as idassert authcDN! */
 381                 if ( BER_BVISNULL( &msc->msc_bound_ndn )
 382                         || BER_BVISEMPTY( &msc->msc_bound_ndn ) )
 383                 {
 384                         LDAP_BACK_CONN_ISANON_SET( msc );
 385
 386                 } else {
 387                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 388                 }
 389                 retcode = META_SEARCH_CANDIDATE;
 390         }
 391
 392         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 393         META_BINDING_CLEAR( &candidates[ candidate ] );
 394
 395         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 396
 397         return retcode;
 398 }
 399
 400 static meta_search_candidate_t
 401 meta_back_search_start(
 402         Operation               *op,
 403         SlapReply               *rs,
 404         dncookie                *dc,
 405         metaconn_t              **mcp,
 406         int                     candidate,
 407         SlapReply               *candidates )
 408 {
 409         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 410         metatarget_t            *mt = mi->mi_targets[ candidate ];
 411         metasingleconn_t        *msc = &(*mcp)->mc_conns[ candidate ];
 412         struct berval           realbase = op->o_req_dn;
 413         int                     realscope = op->ors_scope;
 414         struct berval           mbase = BER_BVNULL;
 415         struct berval           mfilter = BER_BVNULL;
 416         char                    **mapped_attrs = NULL;
 417         int                     rc;
 418         meta_search_candidate_t retcode;
 419         struct timeval          tv, *tvp = NULL;
 420         int                     nretries = 1;
 421         LDAPControl             **ctrls = NULL;
 422
 423         /* this should not happen; just in case... */
 424         if ( msc->msc_ld == NULL ) {
 425                 Debug( LDAP_DEBUG_ANY,
 426                         "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
 427                         op->o_log_prefix, candidate,
 428                         META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
 429                 candidates[ candidate ].sr_err = LDAP_OTHER;
 430                 if ( META_BACK_ONERR_STOP( mi ) ) {
 431                         return META_SEARCH_ERR;
 432                 }
 433                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 434                 return META_SEARCH_NOT_CANDIDATE;
 435         }
 436
 437         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
 438
 439         /*
 440          * modifies the base according to the scope, if required
 441          */
 442         if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
 443                 switch ( op->ors_scope ) {
 444                 case LDAP_SCOPE_SUBTREE:
 445                         /*
 446                          * make the target suffix the new base
 447                          * FIXME: this is very forgiving, because
 448                          * "illegal" searchBases may be turned
 449                          * into the suffix of the target; however,
 450                          * the requested searchBase already passed
 451                          * thru the candidate analyzer...
 452                          */
 453                         if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
 454                                 realbase = mt->mt_nsuffix;
 455                                 if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 456                                         realscope = LDAP_SCOPE_SUBORDINATE;
 457                                 }
 458
 459                         } else {
 460                                 /*
 461                                  * this target is no longer candidate
 462                                  */
 463                                 retcode = META_SEARCH_NOT_CANDIDATE;
 464                                 goto doreturn;
 465                         }
 466                         break;
 467
 468                 case LDAP_SCOPE_SUBORDINATE:
 469                 case LDAP_SCOPE_ONELEVEL:
 470                 {
 471                         struct berval   rdn = mt->mt_nsuffix;
 472                         rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
 473                         if ( dnIsOneLevelRDN( &rdn )
 474                                         && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
 475                         {
 476                                 /*
 477                                  * if there is exactly one level,
 478                                  * make the target suffix the new
 479                                  * base, and make scope "base"
 480                                  */
 481                                 realbase = mt->mt_nsuffix;
 482                                 if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
 483                                         if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 484                                                 realscope = LDAP_SCOPE_SUBORDINATE;
 485                                         } else {
 486                                                 realscope = LDAP_SCOPE_SUBTREE;
 487                                         }
 488                                 } else {
 489                                         realscope = LDAP_SCOPE_BASE;
 490                                 }
 491                                 break;
 492                         } /* else continue with the next case */
 493                 }
 494
 495                 case LDAP_SCOPE_BASE:
 496                         /*
 497                          * this target is no longer candidate
 498                          */
 499                         retcode = META_SEARCH_NOT_CANDIDATE;
 500                         goto doreturn;
 501                 }
 502         }
 503
 504         /* initiate dobind */
 505         retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
 506
 507         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 508
 509         if ( retcode != META_SEARCH_CANDIDATE ) {
 510                 goto doreturn;
 511         }
 512
 513         /*
 514          * Rewrite the search base, if required
 515          */
 516         dc->target = mt;
 517         dc->ctx = "searchBase";
 518         switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
 519         case LDAP_SUCCESS:
 520                 break;
 521
 522         case LDAP_UNWILLING_TO_PERFORM:
 523                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 524                 rs->sr_text = "Operation not allowed";
 525                 send_ldap_result( op, rs );
 526                 retcode = META_SEARCH_ERR;
 527                 goto doreturn;
 528
 529         default:
 530
 531                 /*
 532                  * this target is no longer candidate
 533                  */
 534                 retcode = META_SEARCH_NOT_CANDIDATE;
 535                 goto doreturn;
 536         }
 537
 538         /*
 539          * Maps filter
 540          */
 541         rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
 542                         &mfilter, BACKLDAP_MAP );
 543         switch ( rc ) {
 544         case LDAP_SUCCESS:
 545                 break;
 546
 547         case LDAP_COMPARE_FALSE:
 548         default:
 549                 /*
 550                  * this target is no longer candidate
 551                  */
 552                 retcode = META_SEARCH_NOT_CANDIDATE;
 553                 goto done;
 554         }
 555
 556         /*
 557          * Maps required attributes
 558          */
 559         rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
 560                         op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
 561         if ( rc != LDAP_SUCCESS ) {
 562                 /*
 563                  * this target is no longer candidate
 564                  */
 565                 retcode = META_SEARCH_NOT_CANDIDATE;
 566                 goto done;
 567         }
 568
 569         /* should we check return values? */
 570         if ( op->ors_deref != -1 ) {
 571                 assert( msc->msc_ld != NULL );
 572                 (void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
 573                                 ( void * )&op->ors_deref );
 574         }
 575
 576         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 577                 tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
 578                 tv.tv_usec = 0;
 579                 tvp = &tv;
 580         }
 581
 582 retry:;
 583         ctrls = op->o_ctrls;
 584         if ( ldap_back_proxy_authz_ctrl( &msc->msc_bound_ndn,
 585                 mt->mt_version, &mt->mt_idassert, op, rs, &ctrls )
 586                 != LDAP_SUCCESS )
 587         {
 588                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 589                 retcode = META_SEARCH_NOT_CANDIDATE;
 590                 goto done;
 591         }
 592
 593         /*
 594          * Starts the search
 595          */
 596         assert( msc->msc_ld != NULL );
 597         rc = ldap_search_ext( msc->msc_ld,
 598                         mbase.bv_val, realscope, mfilter.bv_val,
 599                         mapped_attrs, op->ors_attrsonly,
 600                         ctrls, NULL, tvp, op->ors_slimit,
 601                         &candidates[ candidate ].sr_msgid );
 602         switch ( rc ) {
 603         case LDAP_SUCCESS:
 604                 retcode = META_SEARCH_CANDIDATE;
 605                 break;
 606
 607         case LDAP_SERVER_DOWN:
 608                 if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
 609                         nretries = 0;
 610                         /* if the identity changed, there might be need to re-authz */
 611                         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 612                         goto retry;
 613                 }
 614
 615                 if ( *mcp == NULL ) {
 616                         retcode = META_SEARCH_ERR;
 617                         break;
 618                 }
 619                 /* fall thru */
 620
 621         default:
 622                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 623                 retcode = META_SEARCH_NOT_CANDIDATE;
 624         }
 625
 626 done:;
 627         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 628
 629         if ( mapped_attrs ) {
 630                 free( mapped_attrs );
 631         }
 632         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 633                 free( mfilter.bv_val );
 634         }
 635         if ( mbase.bv_val != realbase.bv_val ) {
 636                 free( mbase.bv_val );
 637         }
 638
 639 doreturn:;
 640         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 641
 642         return retcode;
 643 }
 644
 645 int
 646 meta_back_search( Operation *op, SlapReply *rs )
 647 {
 648         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 649         metaconn_t      *mc;
 650         struct timeval  save_tv = { 0, 0 },
 651                         tv;
 652         time_t          stoptime = (time_t)(-1),
 653                         lastres_time = slap_get_time(),
 654                         timeout = 0;
 655         int             rc = 0, sres = LDAP_SUCCESS;
 656         char            *matched = NULL;
 657         int             last = 0, ncandidates = 0,
 658                         initial_candidates = 0, candidate_match = 0,
 659                         needbind = 0;
 660         ldap_back_send_t        sendok = LDAP_BACK_SENDERR;
 661         long            i;
 662         dncookie        dc;
 663         int             is_ok = 0;
 664         void            *savepriv;
 665         SlapReply       *candidates = meta_back_candidates_get( op );
 666
 667         /*
 668          * controls are set in ldap_back_dobind()
 669          *
 670          * FIXME: in case of values return filter, we might want
 671          * to map attrs and maybe rewrite value
 672          */
 673 getconn:;
 674         mc = meta_back_getconn( op, rs, NULL, sendok );
 675         if ( !mc ) {
 676                 return rs->sr_err;
 677         }
 678
 679         dc.conn = op->o_conn;
 680         dc.rs = rs;
 681
 682         /*
 683          * Inits searches
 684          */
 685         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 686                 /* reset sr_msgid; it is used in most loops
 687                  * to check if that target is still to be considered */
 688                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 689
 690                 /* a target is marked as candidate by meta_back_getconn();
 691                  * if for any reason (an error, it's over or so) it is
 692                  * no longer active, sr_msgid is set to META_MSGID_IGNORE
 693                  * but it remains candidate, which means it has been active
 694                  * at some point during the operation.  This allows to
 695                  * use its response code and more to compute the final
 696                  * response */
 697                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 698                         continue;
 699                 }
 700
 701                 candidates[ i ].sr_matched = NULL;
 702                 candidates[ i ].sr_text = NULL;
 703                 candidates[ i ].sr_ref = NULL;
 704                 candidates[ i ].sr_ctrls = NULL;
 705
 706                 /* get largest timeout among candidates */
 707                 if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
 708                         && mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
 709                 {
 710                         timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
 711                 }
 712         }
 713
 714         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 715                 if ( !META_IS_CANDIDATE( &candidates[ i ] )
 716                         || candidates[ i ].sr_err != LDAP_SUCCESS )
 717                 {
 718                         continue;
 719                 }
 720
 721                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 722                 {
 723                 case META_SEARCH_NOT_CANDIDATE:
 724                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 725                         break;
 726
 727                 case META_SEARCH_NEED_BIND:
 728                         ++needbind;
 729                         /* fallthru */
 730
 731                 case META_SEARCH_CANDIDATE:
 732                 case META_SEARCH_BINDING:
 733                         candidates[ i ].sr_type = REP_INTERMEDIATE;
 734                         ++ncandidates;
 735                         break;
 736
 737                 case META_SEARCH_ERR:
 738                         savepriv = op->o_private;
 739                         op->o_private = (void *)i;
 740                         send_ldap_result( op, rs );
 741                         op->o_private = savepriv;
 742                         rc = -1;
 743                         goto finish;
 744
 745                 default:
 746                         assert( 0 );
 747                         break;
 748                 }
 749         }
 750
 751         if ( ncandidates > 0 && needbind == ncandidates ) {
 752                 /*
 753                  * give up the second time...
 754                  *
 755                  * NOTE: this should not occur the second time, since a fresh
 756                  * connection has ben created; however, targets may also
 757                  * need bind because the bind timed out or so.
 758                  */
 759                 if ( sendok & LDAP_BACK_BINDING ) {
 760                         Debug( LDAP_DEBUG_ANY,
 761                                 "%s meta_back_search: unable to initialize conn\n",
 762                                 op->o_log_prefix, 0, 0 );
 763                         rs->sr_err = LDAP_UNAVAILABLE;
 764                         rs->sr_text = "unable to initialize connection to remote targets";
 765                         send_ldap_result( op, rs );
 766                         rc = -1;
 767                         goto finish;
 768                 }
 769
 770                 /* FIXME: better create a separate connection? */
 771                 sendok |= LDAP_BACK_BINDING;
 772
 773 #ifdef DEBUG_205
 774                 Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
 775                         op->o_log_prefix, (void *)mc, 0 );
 776 #endif /* DEBUG_205 */
 777
 778                 meta_back_release_conn( mi, mc );
 779                 mc = NULL;
 780
 781                 needbind = 0;
 782                 ncandidates = 0;
 783
 784                 goto getconn;
 785         }
 786
 787         initial_candidates = ncandidates;
 788
 789         if ( StatslogTest( LDAP_DEBUG_TRACE ) ) {
 790                 char    cnd[ SLAP_TEXT_BUFLEN ];
 791                 int     c;
 792
 793                 for ( c = 0; c < mi->mi_ntargets; c++ ) {
 794                         if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
 795                                 cnd[ c ] = '*';
 796                         } else {
 797                                 cnd[ c ] = ' ';
 798                         }
 799                 }
 800                 cnd[ c ] = '\0';
 801
 802                 Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
 803                         "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
 804         }
 805
 806         if ( initial_candidates == 0 ) {
 807                 /* NOTE: here we are not sending any matchedDN;
 808                  * this is intended, because if the back-meta
 809                  * is serving this search request, but no valid
 810                  * candidate could be looked up, it means that
 811                  * there is a hole in the mapping of the targets
 812                  * and thus no knowledge of any remote superior
 813                  * is available */
 814                 Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
 815                         "base=\"%s\" scope=%d: "
 816                         "no candidate could be selected\n",
 817                         op->o_log_prefix, op->o_req_dn.bv_val,
 818                         op->ors_scope );
 819
 820                 /* FIXME: we're sending the first error we encounter;
 821                  * maybe we should pick the worst... */
 822                 rc = LDAP_NO_SUCH_OBJECT;
 823                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 824                         if ( META_IS_CANDIDATE( &candidates[ i ] )
 825                                 && candidates[ i ].sr_err != LDAP_SUCCESS )
 826                         {
 827                                 rc = candidates[ i ].sr_err;
 828                                 break;
 829                         }
 830                 }
 831
 832                 send_ldap_error( op, rs, rc, NULL );
 833
 834                 goto finish;
 835         }
 836
 837         /* We pull apart the ber result, stuff it into a slapd entry, and
 838          * let send_search_entry stuff it back into ber format. Slow & ugly,
 839          * but this is necessary for version matching, and for ACL processing.
 840          */
 841
 842         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 843                 stoptime = op->o_time + op->ors_tlimit;
 844         }
 845
 846         /*
 847          * In case there are no candidates, no cycle takes place...
 848          *
 849          * FIXME: we might use a queue, to better balance the load
 850          * among the candidates
 851          */
 852         for ( rc = 0; ncandidates > 0; ) {
 853                 int     gotit = 0,
 854                         doabandon = 0,
 855                         alreadybound = ncandidates;
 856                 time_t  curr_time = 0;
 857
 858                 /* check timeout */
 859                 if ( timeout && lastres_time > 0
 860                         && ( slap_get_time() - lastres_time ) > timeout )
 861                 {
 862                         doabandon = 1;
 863                         rs->sr_text = "Operation timed out";
 864                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 865                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 866                         savepriv = op->o_private;
 867                         op->o_private = (void *)i;
 868                         send_ldap_result( op, rs );
 869                         op->o_private = savepriv;
 870                         goto finish;
 871                 }
 872
 873                 /* check time limit */
 874                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 875                                 && slap_get_time() > stoptime )
 876                 {
 877                         doabandon = 1;
 878                         rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 879                         savepriv = op->o_private;
 880                         op->o_private = (void *)i;
 881                         send_ldap_result( op, rs );
 882                         op->o_private = savepriv;
 883                         goto finish;
 884                 }
 885
 886                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 887                         meta_search_candidate_t retcode = META_SEARCH_UNDEFINED;
 888                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 889                         LDAPMessage             *res = NULL, *msg;
 890
 891                         /* if msgid is invalid, don't ldap_result() */
 892                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
 893                                 continue;
 894                         }
 895
 896                         /* if target still needs bind, retry */
 897                         if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND ) {
 898                                 /* initiate dobind */
 899                                 retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
 900
 901                                 Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
 902                                         op->o_log_prefix, i, retcode );
 903
 904                                 switch ( retcode ) {
 905                                 case META_SEARCH_NEED_BIND:
 906                                         alreadybound--;
 907                                         /* fallthru */
 908
 909                                 case META_SEARCH_BINDING:
 910                                         break;
 911
 912                                 case META_SEARCH_ERR:
 913                                         candidates[ i ].sr_err = rs->sr_err;
 914                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 915                                                 savepriv = op->o_private;
 916                                                 op->o_private = (void *)i;
 917                                                 send_ldap_result( op, rs );
 918                                                 op->o_private = savepriv;
 919                                                 goto finish;
 920                                         }
 921                                         /* fallthru */
 922
 923                                 case META_SEARCH_NOT_CANDIDATE:
 924                                         /*
 925                                          * When no candidates are left,
 926                                          * the outer cycle finishes
 927                                          */
 928                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 929                                         assert( ncandidates > 0 );
 930                                         --ncandidates;
 931                                         break;
 932
 933                                 case META_SEARCH_CANDIDATE:
 934                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 935                                         switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 936                                         {
 937                                         case META_SEARCH_CANDIDATE:
 938                                                 assert( candidates[ i ].sr_msgid >= 0 );
 939                                                 break;
 940
 941                                         case META_SEARCH_ERR:
 942                                                 candidates[ i ].sr_err = rs->sr_err;
 943                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
 944                                                         savepriv = op->o_private;
 945                                                         op->o_private = (void *)i;
 946                                                         send_ldap_result( op, rs );
 947                                                         op->o_private = savepriv;
 948                                                         goto finish;
 949                                                 }
 950                                                 /* fallthru */
 951
 952                                         case META_SEARCH_NOT_CANDIDATE:
 953                                                 /* means that meta_back_search_start()
 954                                                  * failed but onerr == continue */
 955                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 956                                                 assert( ncandidates > 0 );
 957                                                 --ncandidates;
 958                                                 break;
 959
 960                                         default:
 961                                                 /* impossible */
 962                                                 assert( 0 );
 963                                                 break;
 964                                         }
 965                                         break;
 966
 967                                 default:
 968                                         /* impossible */
 969                                         assert( 0 );
 970                                         break;
 971                                 }
 972                                 continue;
 973                         }
 974
 975                         /* check for abandon */
 976                         if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
 977                                 break;
 978                         }
 979
 980 #ifdef DEBUG_205
 981                         if ( msc->msc_ld == NULL ) {
 982                                 char    buf[ SLAP_TEXT_BUFLEN ];
 983
 984                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 985                                 snprintf( buf, sizeof( buf ),
 986                                         "%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
 987                                         op->o_log_prefix, (long)i, (void *)mc,
 988                                         candidates[ i ].sr_msgid,
 989                                         META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
 990                                         LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
 991                                         META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
 992                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 993
 994                                 Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
 995                         }
 996 #endif /* DEBUG_205 */
 997
 998                         /*
 999                          * FIXME: handle time limit as well?
1000                          * Note that target servers are likely
1001                          * to handle it, so at some time we'll
1002                          * get a LDAP_TIMELIMIT_EXCEEDED from
1003                          * one of them ...
1004                          */
1005                         tv = save_tv;
1006                         rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
1007                                         LDAP_MSG_RECEIVED, &tv, &res );
1008                         switch ( rc ) {
1009                         case 0:
1010                                 /* FIXME: res should not need to be freed */
1011                                 assert( res == NULL );
1012                                 continue;
1013
1014                         case -1:
1015 really_bad:;
1016                                 /* something REALLY bad happened! */
1017                                 if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1018                                         candidates[ i ].sr_type = REP_RESULT;
1019
1020                                         if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
1021                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1022                                                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
1023                                                 {
1024                                                         /* means that failed but onerr == continue */
1025                                                 case META_SEARCH_NOT_CANDIDATE:
1026                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1027
1028                                                         assert( ncandidates > 0 );
1029                                                         --ncandidates;
1030
1031                                                         candidates[ i ].sr_err = rs->sr_err;
1032                                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1033                                                                 savepriv = op->o_private;
1034                                                                 op->o_private = (void *)i;
1035                                                                 send_ldap_result( op, rs );
1036                                                                 op->o_private = savepriv;
1037                                                                 goto finish;
1038                                                         }
1039                                                         /* fall thru */
1040
1041                                                 case META_SEARCH_CANDIDATE:
1042                                                         /* get back into business... */
1043                                                         continue;
1044
1045                                                 case META_SEARCH_BINDING:
1046                                                 case META_SEARCH_NEED_BIND:
1047                                                 case META_SEARCH_UNDEFINED:
1048                                                         assert( 0 );
1049
1050                                                 default:
1051                                                         /* unrecoverable error */
1052                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1053                                                         rc = rs->sr_err = LDAP_OTHER;
1054                                                         goto finish;
1055                                                 }
1056                                         }
1057
1058                                         candidates[ i ].sr_err = rs->sr_err;
1059                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1060                                                 savepriv = op->o_private;
1061                                                 op->o_private = (void *)i;
1062                                                 send_ldap_result( op, rs );
1063                                                 op->o_private = savepriv;
1064                                                 goto finish;
1065                                         }
1066                                 }
1067
1068                                 /*
1069                                  * When no candidates are left,
1070                                  * the outer cycle finishes
1071                                  */
1072                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1073                                 assert( ncandidates > 0 );
1074                                 --ncandidates;
1075                                 rs->sr_err = candidates[ i ].sr_err;
1076                                 continue;
1077
1078                         default:
1079                                 lastres_time = slap_get_time();
1080
1081                                 /* only touch when activity actually took place... */
1082                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < lastres_time ) {
1083                                         msc->msc_time = lastres_time;
1084                                 }
1085                                 break;
1086                         }
1087
1088                         for ( msg = ldap_first_message( msc->msc_ld, res );
1089                                 msg != NULL;
1090                                 msg = ldap_next_message( msc->msc_ld, msg ) )
1091                         {
1092                                 rc = ldap_msgtype( msg );
1093                                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
1094                                         LDAPMessage     *e;
1095
1096                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1097                                                 /* don't retry any more... */
1098                                                 candidates[ i ].sr_type = REP_RESULT;
1099                                         }
1100
1101                                         is_ok++;
1102
1103                                         e = ldap_first_entry( msc->msc_ld, msg );
1104                                         savepriv = op->o_private;
1105                                         op->o_private = (void *)i;
1106                                         rs->sr_err = meta_send_entry( op, rs, mc, i, e );
1107
1108                                         switch ( rs->sr_err ) {
1109                                         case LDAP_SIZELIMIT_EXCEEDED:
1110                                                 savepriv = op->o_private;
1111                                                 op->o_private = (void *)i;
1112                                                 send_ldap_result( op, rs );
1113                                                 op->o_private = savepriv;
1114                                                 rs->sr_err = LDAP_SUCCESS;
1115                                                 ldap_msgfree( res );
1116                                                 res = NULL;
1117                                                 goto finish;
1118
1119                                         case LDAP_UNAVAILABLE:
1120                                                 rs->sr_err = LDAP_OTHER;
1121                                                 ldap_msgfree( res );
1122                                                 res = NULL;
1123                                                 goto finish;
1124                                         }
1125                                         op->o_private = savepriv;
1126
1127                                         /* don't wait any longer... */
1128                                         gotit = 1;
1129                                         save_tv.tv_sec = 0;
1130                                         save_tv.tv_usec = 0;
1131
1132                                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
1133                                         char            **references = NULL;
1134                                         int             cnt;
1135
1136                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1137                                                 /* don't retry any more... */
1138                                                 candidates[ i ].sr_type = REP_RESULT;
1139                                         }
1140
1141                                         is_ok++;
1142
1143                                         rc = ldap_parse_reference( msc->msc_ld, msg,
1144                                                         &references, &rs->sr_ctrls, 0 );
1145
1146                                         if ( rc != LDAP_SUCCESS ) {
1147                                                 continue;
1148                                         }
1149
1150                                         if ( references == NULL ) {
1151                                                 continue;
1152                                         }
1153
1154 #ifdef ENABLE_REWRITE
1155                                         dc.ctx = "referralDN";
1156 #else /* ! ENABLE_REWRITE */
1157                                         dc.tofrom = 0;
1158                                         dc.normalized = 0;
1159 #endif /* ! ENABLE_REWRITE */
1160
1161                                         /* FIXME: merge all and return at the end */
1162
1163                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1164                                                 ;
1165
1166                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1167
1168                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1169                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
1170                                         }
1171                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
1172
1173                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
1174
1175                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
1176                                                 /* ignore return value by now */
1177                                                 savepriv = op->o_private;
1178                                                 op->o_private = (void *)i;
1179                                                 ( void )send_search_reference( op, rs );
1180                                                 op->o_private = savepriv;
1181
1182                                                 ber_bvarray_free( rs->sr_ref );
1183                                                 rs->sr_ref = NULL;
1184                                         }
1185
1186                                         /* cleanup */
1187                                         if ( references ) {
1188                                                 ber_memvfree( (void **)references );
1189                                         }
1190
1191                                         if ( rs->sr_ctrls ) {
1192                                                 ldap_controls_free( rs->sr_ctrls );
1193                                                 rs->sr_ctrls = NULL;
1194                                         }
1195
1196                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
1197                                         char            buf[ SLAP_TEXT_BUFLEN ];
1198                                         char            **references = NULL;
1199
1200                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1201                                                 /* don't retry any more... */
1202                                                 candidates[ i ].sr_type = REP_RESULT;
1203                                         }
1204
1205                                         /* NOTE: ignores response controls
1206                                          * (and intermediate response controls
1207                                          * as well, except for those with search
1208                                          * references); this may not be correct,
1209                                          * but if they're not ignored then
1210                                          * back-meta would need to merge them
1211                                          * consistently (think of pagedResults...)
1212                                          */
1213                                         /* FIXME: response controls? */
1214                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
1215                                                 msg,
1216                                                 &candidates[ i ].sr_err,
1217                                                 (char **)&candidates[ i ].sr_matched,
1218                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
1219                                                 &references,
1220                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
1221                                                 0 );
1222                                         if ( rs->sr_err != LDAP_SUCCESS ) {
1223                                                 ldap_get_option( msc->msc_ld,
1224                                                         LDAP_OPT_ERROR_NUMBER,
1225                                                         &rs->sr_err );
1226                                                 sres = slap_map_api2result( rs );
1227                                                 candidates[ i ].sr_type = REP_RESULT;
1228                                                 ldap_msgfree( res );
1229                                                 res = NULL;
1230                                                 goto really_bad;
1231                                         }
1232
1233                                         /* massage matchedDN if need be */
1234                                         if ( candidates[ i ].sr_matched != NULL ) {
1235                                                 struct berval   match, mmatch;
1236
1237                                                 ber_str2bv( candidates[ i ].sr_matched,
1238                                                         0, 0, &match );
1239                                                 candidates[ i ].sr_matched = NULL;
1240
1241                                                 dc.ctx = "matchedDN";
1242                                                 dc.target = mi->mi_targets[ i ];
1243                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1244                                                         if ( mmatch.bv_val == match.bv_val ) {
1245                                                                 candidates[ i ].sr_matched
1246                                                                         = ch_strdup( mmatch.bv_val );
1247
1248                                                         } else {
1249                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1250                                                         }
1251
1252                                                         candidate_match++;
1253                                                 }
1254                                                 ldap_memfree( match.bv_val );
1255                                         }
1256
1257                                         /* add references to array */
1258                                         if ( references ) {
1259                                                 BerVarray       sr_ref;
1260                                                 int             cnt;
1261
1262                                                 for ( cnt = 0; references[ cnt ]; cnt++ )
1263                                                         ;
1264
1265                                                 sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1266
1267                                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
1268                                                         ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1269                                                 }
1270                                                 BER_BVZERO( &sr_ref[ cnt ] );
1271
1272                                                 ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1273
1274                                                 /* cleanup */
1275                                                 ber_memvfree( (void **)references );
1276
1277                                                 if ( rs->sr_v2ref == NULL ) {
1278                                                         rs->sr_v2ref = sr_ref;
1279
1280                                                 } else {
1281                                                         for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1282                                                                 ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1283                                                         }
1284                                                         ber_memfree( sr_ref );
1285                                                 }
1286                                         }
1287
1288                                         rs->sr_err = candidates[ i ].sr_err;
1289                                         sres = slap_map_api2result( rs );
1290
1291                                         if ( StatslogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1292                                                 snprintf( buf, sizeof( buf ),
1293                                                         "%s meta_back_search[%ld] "
1294                                                         "match=\"%s\" err=%ld",
1295                                                         op->o_log_prefix, i,
1296                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1297                                                         (long) candidates[ i ].sr_err );
1298                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1299                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1300
1301                                                 } else {
1302                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1303                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1304                                                 }
1305                                         }
1306
1307                                         switch ( sres ) {
1308                                         case LDAP_NO_SUCH_OBJECT:
1309                                                 /* is_ok is touched any time a valid
1310                                                  * (even intermediate) result is
1311                                                  * returned; as a consequence, if
1312                                                  * a candidate returns noSuchObject
1313                                                  * it is ignored and the candidate
1314                                                  * is simply demoted. */
1315                                                 if ( is_ok ) {
1316                                                         sres = LDAP_SUCCESS;
1317                                                 }
1318                                                 break;
1319
1320                                         case LDAP_SUCCESS:
1321                                         case LDAP_REFERRAL:
1322                                                 is_ok++;
1323                                                 break;
1324
1325                                         case LDAP_SIZELIMIT_EXCEEDED:
1326                                                 /* if a target returned sizelimitExceeded
1327                                                  * and the entry count is equal to the
1328                                                  * proxy's limit, the target would have
1329                                                  * returned more, and the error must be
1330                                                  * propagated to the client; otherwise,
1331                                                  * the target enforced a limit lower
1332                                                  * than what requested by the proxy;
1333                                                  * ignore it */
1334                                                 candidates[ i ].sr_err = rs->sr_err;
1335                                                 if ( rs->sr_nentries == op->ors_slimit
1336                                                         || META_BACK_ONERR_STOP( mi ) )
1337                                                 {
1338                                                         savepriv = op->o_private;
1339                                                         op->o_private = (void *)i;
1340                                                         send_ldap_result( op, rs );
1341                                                         op->o_private = savepriv;
1342                                                         ldap_msgfree( res );
1343                                                         res = NULL;
1344                                                         goto finish;
1345                                                 }
1346                                                 break;
1347
1348                                         default:
1349                                                 candidates[ i ].sr_err = rs->sr_err;
1350                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1351                                                         savepriv = op->o_private;
1352                                                         op->o_private = (void *)i;
1353                                                         send_ldap_result( op, rs );
1354                                                         op->o_private = savepriv;
1355                                                         ldap_msgfree( res );
1356                                                         res = NULL;
1357                                                         goto finish;
1358                                                 }
1359                                                 break;
1360                                         }
1361
1362                                         last = i;
1363                                         rc = 0;
1364
1365                                         /*
1366                                          * When no candidates are left,
1367                                          * the outer cycle finishes
1368                                          */
1369                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1370                                         assert( ncandidates > 0 );
1371                                         --ncandidates;
1372
1373                                 } else if ( rc == LDAP_RES_BIND ) {
1374                                         meta_search_candidate_t retcode;
1375
1376                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1377                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1378                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1379                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1380                                         }
1381
1382                                         switch ( retcode ) {
1383                                         case META_SEARCH_CANDIDATE:
1384                                                 break;
1385
1386                                                 /* means that failed but onerr == continue */
1387                                         case META_SEARCH_NOT_CANDIDATE:
1388                                         case META_SEARCH_ERR:
1389                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1390                                                 assert( ncandidates > 0 );
1391                                                 --ncandidates;
1392
1393                                                 candidates[ i ].sr_err = rs->sr_err;
1394                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1395                                                         savepriv = op->o_private;
1396                                                         op->o_private = (void *)i;
1397                                                         send_ldap_result( op, rs );
1398                                                         op->o_private = savepriv;
1399                                                         ldap_msgfree( res );
1400                                                         res = NULL;
1401                                                         goto finish;
1402                                                 }
1403                                                 goto free_message;
1404
1405                                         default:
1406                                                 assert( 0 );
1407                                                 break;
1408                                         }
1409
1410                                 } else {
1411                                         assert( 0 );
1412                                         ldap_msgfree( res );
1413                                         res = NULL;
1414                                         goto really_bad;
1415                                 }
1416                         }
1417
1418 free_message:;
1419                         ldap_msgfree( res );
1420                         res = NULL;
1421                 }
1422
1423                 /* check for abandon */
1424                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
1425                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1426                                 if ( candidates[ i ].sr_msgid >= 0 ) {
1427                                         if ( META_IS_BINDING( &candidates[ i ] ) ) {
1428                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1429                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1430                                                         /* if still binding, destroy */
1431
1432 #ifdef DEBUG_205
1433                                                         char buf[ SLAP_TEXT_BUFLEN ];
1434
1435                                                         snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
1436                                                                 "ldap_unbind_ext[%ld] mc=%p ld=%p",
1437                                                                 op->o_log_prefix, i, (void *)mc,
1438                                                                 (void *)mc->mc_conns[i].msc_ld );
1439
1440                                                         Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
1441 #endif /* DEBUG_205 */
1442
1443                                                         meta_clear_one_candidate( op, mc, i );
1444                                                 }
1445                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1446                                                 META_BINDING_CLEAR( &candidates[ i ] );
1447
1448                                         } else {
1449                                                 (void)meta_back_cancel( mc, op, rs,
1450                                                         candidates[ i ].sr_msgid, i,
1451                                                         LDAP_BACK_DONTSEND );
1452                                         }
1453
1454                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1455                                         assert( ncandidates > 0 );
1456                                         --ncandidates;
1457                                 }
1458                         }
1459
1460                         if ( op->o_abandon ) {
1461                                 rc = SLAPD_ABANDON;
1462                         }
1463
1464                         /* let send_ldap_result play cleanup handlers (ITS#4645) */
1465                         break;
1466                 }
1467
1468                 /* if no entry was found during this loop,
1469                  * set a minimal timeout */
1470                 if ( ncandidates > 0 && gotit == 0 ) {
1471                         if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
1472                                 save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1473
1474                                 /* arbitrarily limit to something between 1 and 2 minutes */
1475                         } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
1476                                 || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
1477                         {
1478                                 /* double the timeout */
1479                                 lutil_timermul( &save_tv, 2, &save_tv );
1480                         }
1481
1482                         if ( alreadybound == 0 ) {
1483                                 tv = save_tv;
1484                                 (void)select( 0, NULL, NULL, NULL, &tv );
1485
1486                         } else {
1487                                 ldap_pvt_thread_yield();
1488                         }
1489                 }
1490         }
1491
1492         if ( rc == -1 ) {
1493                 /*
1494                  * FIXME: need a better strategy to handle errors
1495                  */
1496                 if ( mc ) {
1497                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1498                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1499                                 LDAP_BACK_SENDERR );
1500                 } else {
1501                         rc = rs->sr_err;
1502                 }
1503                 goto finish;
1504         }
1505
1506         /*
1507          * Rewrite the matched portion of the search base, if required
1508          *
1509          * FIXME: only the last one gets caught!
1510          */
1511         savepriv = op->o_private;
1512         op->o_private = (void *)(long)mi->mi_ntargets;
1513         if ( candidate_match > 0 ) {
1514                 struct berval   pmatched = BER_BVNULL;
1515
1516                 /* we use the first one */
1517                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1518                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1519                                         && candidates[ i ].sr_matched != NULL )
1520                         {
1521                                 struct berval   bv, pbv;
1522                                 int             rc;
1523
1524                                 /* if we got success, and this target
1525                                  * returned noSuchObject, and its suffix
1526                                  * is a superior of the searchBase,
1527                                  * ignore the matchedDN */
1528                                 if ( sres == LDAP_SUCCESS
1529                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1530                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1531                                 {
1532                                         free( (char *)candidates[ i ].sr_matched );
1533                                         candidates[ i ].sr_matched = NULL;
1534                                         continue;
1535                                 }
1536
1537                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1538                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1539
1540                                 if ( rc == LDAP_SUCCESS ) {
1541
1542                                         /* NOTE: if they all are superiors
1543                                          * of the baseDN, the shorter is also
1544                                          * superior of the longer... */
1545                                         if ( pbv.bv_len > pmatched.bv_len ) {
1546                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1547                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1548                                                 }
1549                                                 pmatched = pbv;
1550                                                 op->o_private = (void *)i;
1551
1552                                         } else {
1553                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1554                                         }
1555                                 }
1556
1557                                 if ( candidates[ i ].sr_matched != NULL ) {
1558                                         free( (char *)candidates[ i ].sr_matched );
1559                                         candidates[ i ].sr_matched = NULL;
1560                                 }
1561                         }
1562                 }
1563
1564                 if ( !BER_BVISNULL( &pmatched ) ) {
1565                         matched = pmatched.bv_val;
1566                 }
1567
1568         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1569                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1570         }
1571
1572         /*
1573          * In case we returned at least one entry, we return LDAP_SUCCESS
1574          * otherwise, the latter error code we got
1575          */
1576
1577         if ( sres == LDAP_SUCCESS ) {
1578                 if ( rs->sr_v2ref ) {
1579                         sres = LDAP_REFERRAL;
1580                 }
1581
1582                 if ( META_BACK_ONERR_REPORT( mi ) ) {
1583                         /*
1584                          * Report errors, if any
1585                          *
1586                          * FIXME: we should handle error codes and return the more
1587                          * important/reasonable
1588                          */
1589                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1590                                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1591                                         continue;
1592                                 }
1593
1594                                 if ( candidates[ i ].sr_err != LDAP_SUCCESS
1595                                         && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
1596                                 {
1597                                         sres = candidates[ i ].sr_err;
1598                                         break;
1599                                 }
1600                         }
1601                 }
1602         }
1603
1604         rs->sr_err = sres;
1605         rs->sr_matched = matched;
1606         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1607         send_ldap_result( op, rs );
1608         op->o_private = savepriv;
1609         rs->sr_matched = NULL;
1610         rs->sr_ref = NULL;
1611
1612 finish:;
1613         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1614                 op->o_tmpfree( matched, op->o_tmpmemctx );
1615         }
1616
1617         if ( rs->sr_v2ref ) {
1618                 ber_bvarray_free( rs->sr_v2ref );
1619         }
1620
1621         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1622                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1623                         continue;
1624                 }
1625
1626                 if ( mc && META_IS_BINDING( &candidates[ i ] ) ) {
1627                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1628                         if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1629                                 assert( candidates[ i ].sr_msgid >= 0 );
1630                                 assert( mc->mc_conns[ i ].msc_ld != NULL );
1631
1632 #ifdef DEBUG_205
1633                                 Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
1634                                         "ldap_unbind_ext[%ld] ld=%p\n",
1635                                         op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
1636 #endif /* DEBUG_205 */
1637
1638                                 /* if still binding, destroy */
1639                                 meta_clear_one_candidate( op, mc, i );
1640                         }
1641                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1642                         META_BINDING_CLEAR( &candidates[ i ] );
1643                 }
1644
1645                 if ( candidates[ i ].sr_matched ) {
1646                         free( (char *)candidates[ i ].sr_matched );
1647                         candidates[ i ].sr_matched = NULL;
1648                 }
1649
1650                 if ( candidates[ i ].sr_text ) {
1651                         ldap_memfree( (char *)candidates[ i ].sr_text );
1652                         candidates[ i ].sr_text = NULL;
1653                 }
1654
1655                 if ( candidates[ i ].sr_ref ) {
1656                         ber_bvarray_free( candidates[ i ].sr_ref );
1657                         candidates[ i ].sr_ref = NULL;
1658                 }
1659
1660                 if ( candidates[ i ].sr_ctrls ) {
1661                         ldap_controls_free( candidates[ i ].sr_ctrls );
1662                         candidates[ i ].sr_ctrls = NULL;
1663                 }
1664
1665                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1666                         meta_back_quarantine( op, &candidates[ i ], i );
1667                 }
1668
1669                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1670                  * one contacted target never responded, invalidate the connection
1671                  * NOTE: should we quarantine the target as well?  right now, the connection
1672                  * is invalidated; the next time it will be recreated and the target
1673                  * will be quarantined if it cannot be contacted */
1674                 if ( mi->mi_idle_timeout != 0
1675                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1676                         && op->o_time > mc->mc_conns[ i ].msc_time )
1677                 {
1678                         /* don't let anyone else use this expired connection */
1679                         LDAP_BACK_CONN_TAINTED_SET( mc );
1680                 }
1681         }
1682
1683         if ( mc ) {
1684                 meta_back_release_conn( mi, mc );
1685         }
1686
1687         return rs->sr_err;
1688 }
1689
1690 static int
1691 meta_send_entry(
1692         Operation       *op,
1693         SlapReply       *rs,
1694         metaconn_t      *mc,
1695         int             target,
1696         LDAPMessage     *e )
1697 {
1698         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1699         struct berval           a, mapped;
1700         Entry                   ent = { 0 };
1701         BerElement              ber = *e->lm_ber;
1702         Attribute               *attr, **attrp;
1703         struct berval           bdn,
1704                                 dn = BER_BVNULL;
1705         const char              *text;
1706         dncookie                dc;
1707         int                     rc;
1708
1709         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1710                 return LDAP_DECODING_ERROR;
1711         }
1712
1713         /*
1714          * Rewrite the dn of the result, if needed
1715          */
1716         dc.target = mi->mi_targets[ target ];
1717         dc.conn = op->o_conn;
1718         dc.rs = rs;
1719         dc.ctx = "searchResult";
1720
1721         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1722         if ( rs->sr_err != LDAP_SUCCESS) {
1723                 return rs->sr_err;
1724         }
1725
1726         /*
1727          * Note: this may fail if the target host(s) schema differs
1728          * from the one known to the meta, and a DN with unknown
1729          * attributes is returned.
1730          *
1731          * FIXME: should we log anything, or delegate to dnNormalize?
1732          */
1733         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1734                 op->o_tmpmemctx );
1735         if ( dn.bv_val != bdn.bv_val ) {
1736                 free( dn.bv_val );
1737         }
1738         BER_BVZERO( &dn );
1739
1740         if ( rc != LDAP_SUCCESS ) {
1741                 return LDAP_INVALID_DN_SYNTAX;
1742         }
1743
1744         /*
1745          * cache dn
1746          */
1747         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1748                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1749                                 &ent.e_nname, target );
1750         }
1751
1752         attrp = &ent.e_attrs;
1753
1754         dc.ctx = "searchAttrDN";
1755         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1756                 int                             last = 0;
1757                 slap_syntax_validate_func       *validate;
1758                 slap_syntax_transform_func      *pretty;
1759
1760                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1761                                 &a, &mapped, BACKLDAP_REMAP );
1762                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1763                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1764                         continue;
1765                 }
1766                 attr = ( Attribute * )ch_calloc( 1, sizeof( Attribute ) );
1767                 if ( attr == NULL ) {
1768                         continue;
1769                 }
1770                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1771                                 != LDAP_SUCCESS) {
1772                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1773                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1774                         {
1775                                 char    buf[ SLAP_TEXT_BUFLEN ];
1776
1777                                 snprintf( buf, sizeof( buf ),
1778                                         "%s meta_send_entry(\"%s\"): "
1779                                         "slap_bv2undef_ad(%s): %s\n",
1780                                         op->o_log_prefix, ent.e_name.bv_val,
1781                                         mapped.bv_val, text );
1782
1783                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1784                                 ch_free( attr );
1785                                 continue;
1786                         }
1787                 }
1788
1789                 /* no subschemaSubentry */
1790                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1791                         || attr->a_desc == slap_schema.si_ad_entryDN )
1792                 {
1793
1794                         /*
1795                          * We eat target's subschemaSubentry because
1796                          * a search for this value is likely not
1797                          * to resolve to the appropriate backend;
1798                          * later, the local subschemaSubentry is
1799                          * added.
1800                          *
1801                          * We also eat entryDN because the frontend
1802                          * will reattach it without checking if already
1803                          * present...
1804                          */
1805                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1806
1807                         ch_free(attr);
1808                         continue;
1809                 }
1810
1811                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1812                                 || attr->a_vals == NULL )
1813                 {
1814                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1815
1816                 } else {
1817                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1818                                 ;
1819                 }
1820
1821                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1822                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1823
1824                 if ( !validate && !pretty ) {
1825                         attr_free( attr );
1826                         goto next_attr;
1827                 }
1828
1829                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1830                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1831                 {
1832                         struct berval   *bv;
1833
1834                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1835                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1836                                                 bv, &mapped, BACKLDAP_REMAP );
1837                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1838                                         free( bv->bv_val );
1839                                         BER_BVZERO( bv );
1840                                         if ( --last < 0 ) {
1841                                                 break;
1842                                         }
1843                                         *bv = attr->a_vals[ last ];
1844                                         BER_BVZERO( &attr->a_vals[ last ] );
1845                                         bv--;
1846
1847                                 } else if ( mapped.bv_val != bv->bv_val ) {
1848                                         free( bv->bv_val );
1849                                         ber_dupbv( bv, &mapped );
1850                                 }
1851                         }
1852                 /*
1853                  * It is necessary to try to rewrite attributes with
1854                  * dn syntax because they might be used in ACLs as
1855                  * members of groups; since ACLs are applied to the
1856                  * rewritten stuff, no dn-based subecj clause could
1857                  * be used at the ldap backend side (see
1858                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1859                  * The problem can be overcome by moving the dn-based
1860                  * ACLs to the target directory server, and letting
1861                  * everything pass thru the ldap backend.
1862                  */
1863                 } else {
1864                         int     i;
1865
1866                         if ( attr->a_desc->ad_type->sat_syntax ==
1867                                 slap_schema.si_syn_distinguishedName )
1868                         {
1869                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1870
1871                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1872                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1873
1874                         }
1875
1876                         for ( i = 0; i < last; i++ ) {
1877                                 struct berval   pval;
1878                                 int             rc;
1879
1880                                 if ( pretty ) {
1881                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1882                                                 &attr->a_vals[i], &pval, NULL );
1883
1884                                 } else {
1885                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1886                                                 &attr->a_vals[i] );
1887                                 }
1888
1889                                 if ( rc ) {
1890                                         LBER_FREE( attr->a_vals[i].bv_val );
1891                                         if ( --last == i ) {
1892                                                 BER_BVZERO( &attr->a_vals[ i ] );
1893                                                 break;
1894                                         }
1895                                         attr->a_vals[i] = attr->a_vals[last];
1896                                         BER_BVZERO( &attr->a_vals[last] );
1897                                         i--;
1898                                         continue;
1899                                 }
1900
1901                                 if ( pretty ) {
1902                                         LBER_FREE( attr->a_vals[i].bv_val );
1903                                         attr->a_vals[i] = pval;
1904                                 }
1905                         }
1906
1907                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
1908                                 attr_free( attr );
1909                                 goto next_attr;
1910                         }
1911                 }
1912
1913                 if ( last && attr->a_desc->ad_type->sat_equality &&
1914                         attr->a_desc->ad_type->sat_equality->smr_normalize )
1915                 {
1916                         int i;
1917
1918                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
1919                         for ( i = 0; i<last; i++ ) {
1920                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
1921                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
1922                                         attr->a_desc->ad_type->sat_syntax,
1923                                         attr->a_desc->ad_type->sat_equality,
1924                                         &attr->a_vals[i], &attr->a_nvals[i],
1925                                         NULL );
1926                         }
1927                         BER_BVZERO( &attr->a_nvals[i] );
1928
1929                 } else {
1930                         attr->a_nvals = attr->a_vals;
1931                 }
1932
1933                 *attrp = attr;
1934                 attrp = &attr->a_next;
1935 next_attr:;
1936         }
1937         rs->sr_entry = &ent;
1938         rs->sr_attrs = op->ors_attrs;
1939         rs->sr_flags = 0;
1940         rs->sr_err = LDAP_SUCCESS;
1941         rc = send_search_entry( op, rs );
1942         switch ( rc ) {
1943         case LDAP_UNAVAILABLE:
1944                 rc = LDAP_OTHER;
1945                 break;
1946         }
1947         rs->sr_entry = NULL;
1948         rs->sr_attrs = NULL;
1949
1950         if ( !BER_BVISNULL( &ent.e_name ) ) {
1951                 free( ent.e_name.bv_val );
1952                 BER_BVZERO( &ent.e_name );
1953         }
1954         if ( !BER_BVISNULL( &ent.e_nname ) ) {
1955                 free( ent.e_nname.bv_val );
1956                 BER_BVZERO( &ent.e_nname );
1957         }
1958         entry_clean( &ent );
1959
1960         return rc;
1961 }
1962