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_ERR = -1,
  56         META_SEARCH_NOT_CANDIDATE,
  57         META_SEARCH_CANDIDATE,
  58         META_SEARCH_BINDING,
  59         META_SEARCH_NEED_BIND
  60 } meta_search_candidate_t;
  61
  62 /*
  63  * meta_search_dobind_init()
  64  *
  65  * initiates bind for a candidate target of a search.
  66  */
  67 static meta_search_candidate_t
  68 meta_search_dobind_init(
  69         Operation               *op,
  70         SlapReply               *rs,
  71         metaconn_t              **mcp,
  72         int                     candidate,
  73         SlapReply               *candidates )
  74 {
  75         metaconn_t              *mc = *mcp;
  76         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
  77         metatarget_t            *mt = mi->mi_targets[ candidate ];
  78         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
  79
  80         struct berval           binddn = msc->msc_bound_ndn,
  81                                 cred = msc->msc_cred;
  82         int                     method;
  83
  84         int                     rc;
  85
  86         meta_search_candidate_t retcode;
  87
  88         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n",
  89                 op->o_log_prefix, candidate, 0 );
  90
  91         /*
  92          * all the targets are already bound as pseudoroot
  93          */
  94         if ( mc->mc_authz_target == META_BOUND_ALL ) {
  95                 return META_SEARCH_CANDIDATE;
  96         }
  97
  98         retcode = META_SEARCH_BINDING;
  99         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 100         if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 101                 /* already bound (or anonymous) */
 102
 103 #ifdef DEBUG_205
 104                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 105                 int     bound = 0;
 106
 107                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 108                         bound = 1;
 109                 }
 110
 111                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p%s DN=\"%s\"",
 112                         (void *)mc, (void *)msc->msc_ld,
 113                         bound ? " bound" : " anonymous",
 114                         bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
 115                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 116                         op->o_log_prefix, candidate, buf );
 117 #endif /* DEBUG_205 */
 118
 119                 retcode = META_SEARCH_CANDIDATE;
 120
 121         } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
 122                 /* another thread is binding the target for this conn; wait */
 123
 124 #ifdef DEBUG_205
 125                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 126
 127                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p needbind",
 128                         (void *)mc, (void *)msc->msc_ld );
 129                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 130                         op->o_log_prefix, candidate, buf );
 131 #endif /* DEBUG_205 */
 132
 133                 candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
 134                 retcode = META_SEARCH_NEED_BIND;
 135
 136         } else {
 137                 /* we'll need to bind the target for this conn */
 138
 139 #ifdef DEBUG_205
 140                 char buf[ SLAP_TEXT_BUFLEN ];
 141
 142                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p binding",
 143                         (void *)mc, (void *)msc->msc_ld );
 144                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 145                         op->o_log_prefix, candidate, buf );
 146 #endif /* DEBUG_205 */
 147
 148                 if ( msc->msc_ld == NULL ) {
 149                         /* for some reason (e.g. because formerly in "binding"
 150                          * state, with eventual connection expiration or invalidation)
 151                          * it was not initialized as expected */
 152
 153                         Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p ld=NULL\n",
 154                                 op->o_log_prefix, candidate, (void *)mc );
 155
 156                         rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
 157                                 LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND, 0 );
 158                         switch ( rc ) {
 159                         case LDAP_SUCCESS:
 160                                 assert( msc->msc_ld != NULL );
 161                                 break;
 162
 163                         case LDAP_SERVER_DOWN:
 164                         case LDAP_UNAVAILABLE:
 165                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 166                                 goto down;
 167
 168                         default:
 169                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 170                                 goto other;
 171                         }
 172                 }
 173
 174                 LDAP_BACK_CONN_BINDING_SET( msc );
 175         }
 176
 177         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 178
 179         if ( retcode != META_SEARCH_BINDING ) {
 180                 return retcode;
 181         }
 182
 183         /* NOTE: this obsoletes pseudorootdn */
 184         if ( op->o_conn != NULL &&
 185                 !op->o_do_not_cache &&
 186                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 187                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 188                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 189         {
 190                 rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
 191                 if ( rc != LDAP_SUCCESS ) {
 192                         goto down;
 193                 }
 194
 195                 /* NOTE: we copy things here, even if bind didn't succeed yet,
 196                  * because the connection is not shared until bind is over */
 197                 if ( !BER_BVISNULL( &binddn ) ) {
 198                         ber_bvreplace( &msc->msc_bound_ndn, &binddn );
 199                         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &cred ) ) {
 200                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 201                                         memset( msc->msc_cred.bv_val, 0,
 202                                                 msc->msc_cred.bv_len );
 203                                 }
 204                                 ber_bvreplace( &msc->msc_cred, &cred );
 205                         }
 206                 }
 207
 208                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 209                         /* apparently, idassert was configured with SASL bind,
 210                          * so bind occurred inside meta_back_proxy_authz_cred() */
 211                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 212                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 213                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 214                         return META_SEARCH_CANDIDATE;
 215                 }
 216
 217                 /* paranoid */
 218                 switch ( method ) {
 219                 case LDAP_AUTH_NONE:
 220                 case LDAP_AUTH_SIMPLE:
 221                         /* do a simple bind with binddn, cred */
 222                         break;
 223
 224                 default:
 225                         assert( 0 );
 226                         break;
 227                 }
 228         }
 229
 230         assert( msc->msc_ld != NULL );
 231
 232         /* connect must be async */
 233 retry:;
 234         ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_ON );
 235
 236         rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
 237                         NULL, NULL, &candidates[ candidate ].sr_msgid );
 238
 239 #ifdef DEBUG_205
 240         {
 241                 char buf[ SLAP_TEXT_BUFLEN ];
 242
 243                 snprintf( buf, sizeof( buf ), "meta_search_dobind_init[%d] mc=%p ld=%p rc=%d",
 244                         candidate, (void *)mc, (void *)mc->mc_conns[ candidate ].msc_ld, rc );
 245                 Debug( LDAP_DEBUG_ANY, "### %s %s\n",
 246                         op->o_log_prefix, buf, 0 );
 247         }
 248 #endif /* DEBUG_205 */
 249
 250         switch ( rc ) {
 251         case LDAP_SUCCESS:
 252                 assert( candidates[ candidate ].sr_msgid >= 0 );
 253                 META_BINDING_SET( &candidates[ candidate ] );
 254                 return META_SEARCH_BINDING;
 255
 256         case LDAP_X_CONNECTING:
 257                 /* must retry, same conn */
 258                 candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
 259                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 260                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 261                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 262                 return META_SEARCH_NEED_BIND;
 263
 264         case LDAP_SERVER_DOWN:
 265 down:;
 266                 /* This is the worst thing that could happen:
 267                  * the search will wait until the retry is over. */
 268                 if ( !META_IS_RETRYING( &candidates[ candidate ] ) ) {
 269                         META_RETRYING_SET( &candidates[ candidate ] );
 270
 271                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 272
 273                         assert( mc->mc_refcnt > 0 );
 274                         if ( LogTest( LDAP_DEBUG_ANY ) ) {
 275                                 char    buf[ SLAP_TEXT_BUFLEN ];
 276
 277                                 /* this lock is required; however,
 278                                  * it's invoked only when logging is on */
 279                                 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 280                                 snprintf( buf, sizeof( buf ),
 281                                         "retrying URI=\"%s\" DN=\"%s\"",
 282                                         mt->mt_uri,
 283                                         BER_BVISNULL( &msc->msc_bound_ndn ) ?
 284                                                 "" : msc->msc_bound_ndn.bv_val );
 285                                 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 286
 287                                 Debug( LDAP_DEBUG_ANY,
 288                                         "%s meta_search_dobind_init[%d]: %s.\n",
 289                                         op->o_log_prefix, candidate, buf );
 290                         }
 291
 292                         meta_clear_one_candidate( op, mc, candidate );
 293                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 294
 295                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 296
 297                         /* mc here must be the regular mc, reset and ready for init */
 298                         rc = meta_back_init_one_conn( op, rs, mc, candidate,
 299                                 LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
 300
 301                         LDAP_BACK_CONN_BINDING_SET( msc );
 302                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 303
 304                         goto retry;
 305                 }
 306
 307                 if ( *mcp == NULL ) {
 308                         retcode = META_SEARCH_ERR;
 309                         rs->sr_err = LDAP_UNAVAILABLE;
 310                         break;
 311                 }
 312                 /* fall thru */
 313
 314         default:
 315 other:;
 316                 rs->sr_err = rc;
 317                 rc = slap_map_api2result( rs );
 318
 319                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 320                 meta_clear_one_candidate( op, mc, candidate );
 321                 candidates[ candidate ].sr_err = rc;
 322                 if ( META_BACK_ONERR_STOP( mi ) ) {
 323                         LDAP_BACK_CONN_TAINTED_SET( mc );
 324                         meta_back_release_conn_lock( op, mc, 0 );
 325                         *mcp = NULL;
 326
 327                         retcode = META_SEARCH_ERR;
 328
 329                 } else {
 330                         retcode = META_SEARCH_NOT_CANDIDATE;
 331                 }
 332                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 333                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 334                 break;
 335         }
 336
 337         return retcode;
 338 }
 339
 340 static meta_search_candidate_t
 341 meta_search_dobind_result(
 342         Operation               *op,
 343         SlapReply               *rs,
 344         metaconn_t              **mcp,
 345         int                     candidate,
 346         SlapReply               *candidates,
 347         LDAPMessage             *res )
 348 {
 349         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 350         metaconn_t              *mc = *mcp;
 351         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 352
 353         meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
 354         int                     rc;
 355
 356         assert( msc->msc_ld != NULL );
 357
 358         /* FIXME: matched? referrals? response controls? */
 359         rc = ldap_parse_result( msc->msc_ld, res,
 360                 &candidates[ candidate ].sr_err,
 361                 NULL, NULL, NULL, NULL, 0 );
 362         if ( rc != LDAP_SUCCESS ) {
 363                 candidates[ candidate ].sr_err = rc;
 364
 365         } else {
 366                 rc = slap_map_api2result( &candidates[ candidate ] );
 367         }
 368
 369         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 370         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 371         if ( rc != LDAP_SUCCESS ) {
 372                 meta_clear_one_candidate( op, mc, candidate );
 373                 candidates[ candidate ].sr_err = rc;
 374                 if ( META_BACK_ONERR_STOP( mi ) ) {
 375                         LDAP_BACK_CONN_TAINTED_SET( mc );
 376                         meta_back_release_conn_lock( op, mc, 0 );
 377                         *mcp = NULL;
 378                         retcode = META_SEARCH_ERR;
 379                         rs->sr_err = rc;
 380                 }
 381
 382         } else {
 383                 /* FIXME: check if bound as idassert authcDN! */
 384                 if ( BER_BVISNULL( &msc->msc_bound_ndn )
 385                         || BER_BVISEMPTY( &msc->msc_bound_ndn ) )
 386                 {
 387                         LDAP_BACK_CONN_ISANON_SET( msc );
 388
 389                 } else {
 390                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 391                 }
 392                 retcode = META_SEARCH_CANDIDATE;
 393
 394                 /* connect must be async */
 395                 ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_OFF );
 396         }
 397
 398         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 399         META_BINDING_CLEAR( &candidates[ candidate ] );
 400
 401         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 402
 403         return retcode;
 404 }
 405
 406 static meta_search_candidate_t
 407 meta_back_search_start(
 408         Operation               *op,
 409         SlapReply               *rs,
 410         dncookie                *dc,
 411         metaconn_t              **mcp,
 412         int                     candidate,
 413         SlapReply               *candidates )
 414 {
 415         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 416         metatarget_t            *mt = mi->mi_targets[ candidate ];
 417         metasingleconn_t        *msc = &(*mcp)->mc_conns[ candidate ];
 418         struct berval           realbase = op->o_req_dn;
 419         int                     realscope = op->ors_scope;
 420         struct berval           mbase = BER_BVNULL;
 421         struct berval           mfilter = BER_BVNULL;
 422         char                    **mapped_attrs = NULL;
 423         int                     rc;
 424         meta_search_candidate_t retcode;
 425         struct timeval          tv, *tvp = NULL;
 426         int                     nretries = 1;
 427         LDAPControl             **ctrls = NULL;
 428
 429         /* this should not happen; just in case... */
 430         if ( msc->msc_ld == NULL ) {
 431                 Debug( LDAP_DEBUG_ANY,
 432                         "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
 433                         op->o_log_prefix, candidate,
 434                         META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
 435                 candidates[ candidate ].sr_err = LDAP_OTHER;
 436                 if ( META_BACK_ONERR_STOP( mi ) ) {
 437                         return META_SEARCH_ERR;
 438                 }
 439                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 440                 return META_SEARCH_NOT_CANDIDATE;
 441         }
 442
 443         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
 444
 445         /*
 446          * modifies the base according to the scope, if required
 447          */
 448         if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
 449                 switch ( op->ors_scope ) {
 450                 case LDAP_SCOPE_SUBTREE:
 451                         /*
 452                          * make the target suffix the new base
 453                          * FIXME: this is very forgiving, because
 454                          * "illegal" searchBases may be turned
 455                          * into the suffix of the target; however,
 456                          * the requested searchBase already passed
 457                          * thru the candidate analyzer...
 458                          */
 459                         if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
 460                                 realbase = mt->mt_nsuffix;
 461                                 if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 462                                         realscope = LDAP_SCOPE_SUBORDINATE;
 463                                 }
 464
 465                         } else {
 466                                 /*
 467                                  * this target is no longer candidate
 468                                  */
 469                                 retcode = META_SEARCH_NOT_CANDIDATE;
 470                                 goto doreturn;
 471                         }
 472                         break;
 473
 474                 case LDAP_SCOPE_SUBORDINATE:
 475                 case LDAP_SCOPE_ONELEVEL:
 476                 {
 477                         struct berval   rdn = mt->mt_nsuffix;
 478                         rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
 479                         if ( dnIsOneLevelRDN( &rdn )
 480                                         && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
 481                         {
 482                                 /*
 483                                  * if there is exactly one level,
 484                                  * make the target suffix the new
 485                                  * base, and make scope "base"
 486                                  */
 487                                 realbase = mt->mt_nsuffix;
 488                                 if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
 489                                         if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 490                                                 realscope = LDAP_SCOPE_SUBORDINATE;
 491                                         } else {
 492                                                 realscope = LDAP_SCOPE_SUBTREE;
 493                                         }
 494                                 } else {
 495                                         realscope = LDAP_SCOPE_BASE;
 496                                 }
 497                                 break;
 498                         } /* else continue with the next case */
 499                 }
 500
 501                 case LDAP_SCOPE_BASE:
 502                         /*
 503                          * this target is no longer candidate
 504                          */
 505                         retcode = META_SEARCH_NOT_CANDIDATE;
 506                         goto doreturn;
 507                 }
 508         }
 509
 510         /* initiate dobind */
 511         retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
 512
 513         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 514
 515         if ( retcode != META_SEARCH_CANDIDATE ) {
 516                 goto doreturn;
 517         }
 518
 519         /*
 520          * Rewrite the search base, if required
 521          */
 522         dc->target = mt;
 523         dc->ctx = "searchBase";
 524         switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
 525         case LDAP_SUCCESS:
 526                 break;
 527
 528         case LDAP_UNWILLING_TO_PERFORM:
 529                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 530                 rs->sr_text = "Operation not allowed";
 531                 send_ldap_result( op, rs );
 532                 retcode = META_SEARCH_ERR;
 533                 goto doreturn;
 534
 535         default:
 536
 537                 /*
 538                  * this target is no longer candidate
 539                  */
 540                 retcode = META_SEARCH_NOT_CANDIDATE;
 541                 goto doreturn;
 542         }
 543
 544         /*
 545          * Maps filter
 546          */
 547         rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
 548                         &mfilter, BACKLDAP_MAP );
 549         switch ( rc ) {
 550         case LDAP_SUCCESS:
 551                 break;
 552
 553         case LDAP_COMPARE_FALSE:
 554         default:
 555                 /*
 556                  * this target is no longer candidate
 557                  */
 558                 retcode = META_SEARCH_NOT_CANDIDATE;
 559                 goto done;
 560         }
 561
 562         /*
 563          * Maps required attributes
 564          */
 565         rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
 566                         op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
 567         if ( rc != LDAP_SUCCESS ) {
 568                 /*
 569                  * this target is no longer candidate
 570                  */
 571                 retcode = META_SEARCH_NOT_CANDIDATE;
 572                 goto done;
 573         }
 574
 575         /* should we check return values? */
 576         if ( op->ors_deref != -1 ) {
 577                 assert( msc->msc_ld != NULL );
 578                 (void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
 579                                 ( void * )&op->ors_deref );
 580         }
 581
 582         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 583                 tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
 584                 tv.tv_usec = 0;
 585                 tvp = &tv;
 586         }
 587
 588 retry:;
 589         ctrls = op->o_ctrls;
 590         if ( ldap_back_proxy_authz_ctrl( &msc->msc_bound_ndn,
 591                 mt->mt_version, &mt->mt_idassert, op, rs, &ctrls )
 592                 != LDAP_SUCCESS )
 593         {
 594                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 595                 retcode = META_SEARCH_NOT_CANDIDATE;
 596                 goto done;
 597         }
 598
 599         /*
 600          * Starts the search
 601          */
 602         assert( msc->msc_ld != NULL );
 603         rc = ldap_search_ext( msc->msc_ld,
 604                         mbase.bv_val, realscope, mfilter.bv_val,
 605                         mapped_attrs, op->ors_attrsonly,
 606                         ctrls, NULL, tvp, op->ors_slimit,
 607                         &candidates[ candidate ].sr_msgid );
 608         switch ( rc ) {
 609         case LDAP_SUCCESS:
 610                 retcode = META_SEARCH_CANDIDATE;
 611                 break;
 612
 613         case LDAP_SERVER_DOWN:
 614                 if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
 615                         nretries = 0;
 616                         /* if the identity changed, there might be need to re-authz */
 617                         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 618                         goto retry;
 619                 }
 620
 621                 if ( *mcp == NULL ) {
 622                         retcode = META_SEARCH_ERR;
 623                         break;
 624                 }
 625                 /* fall thru */
 626
 627         default:
 628                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 629                 retcode = META_SEARCH_NOT_CANDIDATE;
 630         }
 631
 632 done:;
 633         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 634
 635         if ( mapped_attrs ) {
 636                 free( mapped_attrs );
 637         }
 638         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 639                 free( mfilter.bv_val );
 640         }
 641         if ( mbase.bv_val != realbase.bv_val ) {
 642                 free( mbase.bv_val );
 643         }
 644
 645 doreturn:;
 646         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 647
 648         return retcode;
 649 }
 650
 651 int
 652 meta_back_search( Operation *op, SlapReply *rs )
 653 {
 654         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 655         metaconn_t      *mc;
 656         struct timeval  save_tv = { 0, 0 },
 657                         tv;
 658         time_t          stoptime = (time_t)-1;
 659         int             rc = 0, sres = LDAP_SUCCESS;
 660         char            *matched = NULL;
 661         int             last = 0, ncandidates = 0,
 662                         initial_candidates = 0, candidate_match = 0,
 663                         needbind = 0;
 664         ldap_back_send_t        sendok = LDAP_BACK_SENDERR;
 665         long            i;
 666         dncookie        dc;
 667         int             is_ok = 0;
 668         void            *savepriv;
 669         SlapReply       *candidates = meta_back_candidates_get( op );
 670
 671         /*
 672          * controls are set in ldap_back_dobind()
 673          *
 674          * FIXME: in case of values return filter, we might want
 675          * to map attrs and maybe rewrite value
 676          */
 677 getconn:;
 678         mc = meta_back_getconn( op, rs, NULL, sendok );
 679         if ( !mc ) {
 680                 return rs->sr_err;
 681         }
 682
 683         dc.conn = op->o_conn;
 684         dc.rs = rs;
 685
 686         /*
 687          * Inits searches
 688          */
 689         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 690                 /* reset sr_msgid; it is used in most loops
 691                  * to check if that target is still to be considered */
 692                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 693
 694                 /* a target is marked as candidate by meta_back_getconn();
 695                  * if for any reason (an error, it's over or so) it is
 696                  * no longer active, sr_msgid is set to META_MSGID_IGNORE
 697                  * but it remains candidate, which means it has been active
 698                  * at some point during the operation.  This allows to
 699                  * use its response code and more to compute the final
 700                  * response */
 701                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 702                         continue;
 703                 }
 704
 705                 candidates[ i ].sr_matched = NULL;
 706                 candidates[ i ].sr_text = NULL;
 707                 candidates[ i ].sr_ref = NULL;
 708                 candidates[ i ].sr_ctrls = NULL;
 709         }
 710
 711         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 712                 if ( !META_IS_CANDIDATE( &candidates[ i ] )
 713                         || candidates[ i ].sr_err != LDAP_SUCCESS )
 714                 {
 715                         continue;
 716                 }
 717
 718                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 719                 {
 720                 case META_SEARCH_NOT_CANDIDATE:
 721                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 722                         break;
 723
 724                 case META_SEARCH_NEED_BIND:
 725                         ++needbind;
 726                         /* fallthru */
 727
 728                 case META_SEARCH_CANDIDATE:
 729                 case META_SEARCH_BINDING:
 730                         candidates[ i ].sr_type = REP_INTERMEDIATE;
 731                         ++ncandidates;
 732                         break;
 733
 734                 case META_SEARCH_ERR:
 735                         savepriv = op->o_private;
 736                         op->o_private = (void *)i;
 737                         send_ldap_result( op, rs );
 738                         op->o_private = savepriv;
 739                         rc = -1;
 740                         goto finish;
 741                 }
 742         }
 743
 744         if ( ncandidates > 0 && needbind == ncandidates ) {
 745                 /*
 746                  * give up the second time...
 747                  *
 748                  * NOTE: this should not occur the second time, since a fresh
 749                  * connection has ben created; however, targets may also
 750                  * need bind because the bind timed out or so.
 751                  */
 752                 if ( sendok & LDAP_BACK_BINDING ) {
 753                         Debug( LDAP_DEBUG_ANY,
 754                                 "%s meta_back_search: unable to initialize conn\n",
 755                                 op->o_log_prefix, 0, 0 );
 756                         rs->sr_err = LDAP_UNAVAILABLE;
 757                         rs->sr_text = "unable to initialize connection to remote targets";
 758                         send_ldap_result( op, rs );
 759                         rc = -1;
 760                         goto finish;
 761                 }
 762
 763                 /* FIXME: better create a separate connection? */
 764                 sendok |= LDAP_BACK_BINDING;
 765
 766 #ifdef DEBUG_205
 767                 Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
 768                         op->o_log_prefix, (void *)mc, 0 );
 769 #endif /* DEBUG_205 */
 770
 771                 meta_back_release_conn( op, mc );
 772                 mc = NULL;
 773
 774                 needbind = 0;
 775                 ncandidates = 0;
 776
 777                 goto getconn;
 778         }
 779
 780         initial_candidates = ncandidates;
 781
 782         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 783                 char    cnd[ SLAP_TEXT_BUFLEN ];
 784                 int     c;
 785
 786                 for ( c = 0; c < mi->mi_ntargets; c++ ) {
 787                         if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
 788                                 cnd[ c ] = '*';
 789                         } else {
 790                                 cnd[ c ] = ' ';
 791                         }
 792                 }
 793                 cnd[ c ] = '\0';
 794
 795                 Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
 796                         "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
 797         }
 798
 799         if ( initial_candidates == 0 ) {
 800                 /* NOTE: here we are not sending any matchedDN;
 801                  * this is intended, because if the back-meta
 802                  * is serving this search request, but no valid
 803                  * candidate could be looked up, it means that
 804                  * there is a hole in the mapping of the targets
 805                  * and thus no knowledge of any remote superior
 806                  * is available */
 807                 Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
 808                         "base=\"%s\" scope=%d: "
 809                         "no candidate could be selected\n",
 810                         op->o_log_prefix, op->o_req_dn.bv_val,
 811                         op->ors_scope );
 812
 813                 /* FIXME: we're sending the first error we encounter;
 814                  * maybe we should pick the worst... */
 815                 rc = LDAP_NO_SUCH_OBJECT;
 816                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 817                         if ( META_IS_CANDIDATE( &candidates[ i ] )
 818                                 && candidates[ i ].sr_err != LDAP_SUCCESS )
 819                         {
 820                                 rc = candidates[ i ].sr_err;
 821                                 break;
 822                         }
 823                 }
 824
 825                 send_ldap_error( op, rs, rc, NULL );
 826
 827                 goto finish;
 828         }
 829
 830         /* We pull apart the ber result, stuff it into a slapd entry, and
 831          * let send_search_entry stuff it back into ber format. Slow & ugly,
 832          * but this is necessary for version matching, and for ACL processing.
 833          */
 834
 835         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 836                 stoptime = op->o_time + op->ors_tlimit;
 837         }
 838
 839         /*
 840          * In case there are no candidates, no cycle takes place...
 841          *
 842          * FIXME: we might use a queue, to better balance the load
 843          * among the candidates
 844          */
 845         for ( rc = 0; ncandidates > 0; ) {
 846                 int     gotit = 0,
 847                         doabandon = 0,
 848                         alreadybound = ncandidates;
 849
 850                 /* check time limit */
 851                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 852                                 && slap_get_time() > stoptime )
 853                 {
 854                         doabandon = 1;
 855                         rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 856                         savepriv = op->o_private;
 857                         op->o_private = (void *)i;
 858                         send_ldap_result( op, rs );
 859                         op->o_private = savepriv;
 860                         goto finish;
 861                 }
 862
 863                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 864                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 865                         LDAPMessage             *res = NULL, *msg;
 866
 867                         /* if msgid is invalid, don't ldap_result() */
 868                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
 869                                 continue;
 870                         }
 871
 872                         /* if target still needs bind, retry */
 873                         if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND ) {
 874                                 meta_search_candidate_t retcode;
 875
 876                                 /* initiate dobind */
 877                                 retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
 878
 879                                 Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
 880                                         op->o_log_prefix, i, retcode );
 881
 882                                 switch ( retcode ) {
 883                                 case META_SEARCH_NEED_BIND:
 884                                         alreadybound--;
 885                                         /* fallthru */
 886
 887                                 case META_SEARCH_BINDING:
 888                                         break;
 889
 890                                 case META_SEARCH_ERR:
 891                                         candidates[ i ].sr_err = rs->sr_err;
 892                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 893                                                 savepriv = op->o_private;
 894                                                 op->o_private = (void *)i;
 895                                                 send_ldap_result( op, rs );
 896                                                 op->o_private = savepriv;
 897                                                 goto finish;
 898                                         }
 899                                         /* fallthru */
 900
 901                                 case META_SEARCH_NOT_CANDIDATE:
 902                                         /*
 903                                          * When no candidates are left,
 904                                          * the outer cycle finishes
 905                                          */
 906                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 907                                         assert( ncandidates > 0 );
 908                                         --ncandidates;
 909                                         break;
 910
 911                                 case META_SEARCH_CANDIDATE:
 912                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 913                                         switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 914                                         {
 915                                         case META_SEARCH_CANDIDATE:
 916                                                 assert( candidates[ i ].sr_msgid >= 0 );
 917                                                 break;
 918
 919                                         case META_SEARCH_ERR:
 920                                                 candidates[ i ].sr_err = rs->sr_err;
 921                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
 922                                                         savepriv = op->o_private;
 923                                                         op->o_private = (void *)i;
 924                                                         send_ldap_result( op, rs );
 925                                                         op->o_private = savepriv;
 926                                                         goto finish;
 927                                                 }
 928                                                 /* fallthru */
 929
 930                                         case META_SEARCH_NOT_CANDIDATE:
 931                                                 /* means that meta_back_search_start()
 932                                                  * failed but onerr == continue */
 933                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 934                                                 assert( ncandidates > 0 );
 935                                                 --ncandidates;
 936                                                 break;
 937
 938                                         default:
 939                                                 /* impossible */
 940                                                 assert( 0 );
 941                                                 break;
 942                                         }
 943                                         break;
 944
 945                                 default:
 946                                         /* impossible */
 947                                         assert( 0 );
 948                                         break;
 949                                 }
 950                                 continue;
 951                         }
 952
 953                         /* check for abandon */
 954                         if ( op->o_abandon ) {
 955                                 break;
 956                         }
 957
 958 #ifdef DEBUG_205
 959                         if ( msc->msc_ld == NULL ) {
 960                                 char    buf[ SLAP_TEXT_BUFLEN ];
 961
 962                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 963                                 snprintf( buf, sizeof( buf ),
 964                                         "%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
 965                                         op->o_log_prefix, (long)i, (void *)mc,
 966                                         candidates[ i ].sr_msgid,
 967                                         META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
 968                                         LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
 969                                         META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
 970                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 971
 972                                 Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
 973                         }
 974 #endif /* DEBUG_205 */
 975
 976                         /*
 977                          * FIXME: handle time limit as well?
 978                          * Note that target servers are likely
 979                          * to handle it, so at some time we'll
 980                          * get a LDAP_TIMELIMIT_EXCEEDED from
 981                          * one of them ...
 982                          */
 983                         tv = save_tv;
 984                         rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
 985                                         LDAP_MSG_RECEIVED, &tv, &res );
 986                         switch ( rc ) {
 987                         case 0:
 988                                 /* FIXME: res should not need to be freed */
 989                                 assert( res == NULL );
 990                                 continue;
 991
 992                         case -1:
 993 really_bad:;
 994                                 /* something REALLY bad happened! */
 995                                 if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
 996                                         candidates[ i ].sr_type = REP_RESULT;
 997
 998                                         if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
 999                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1000                                                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
1001                                                 {
1002                                                 case META_SEARCH_CANDIDATE:
1003                                                         /* get back into business... */
1004                                                         continue;
1005
1006                                                         /* means that failed but onerr == continue */
1007                                                 case META_SEARCH_NOT_CANDIDATE:
1008                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1009                                                         --ncandidates;
1010
1011                                                         candidates[ i ].sr_err = rs->sr_err;
1012                                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1013                                                                 savepriv = op->o_private;
1014                                                                 op->o_private = (void *)i;
1015                                                                 send_ldap_result( op, rs );
1016                                                                 op->o_private = savepriv;
1017                                                                 goto finish;
1018                                                         }
1019                                                         break;
1020
1021                                                 case META_SEARCH_BINDING:
1022                                                 case META_SEARCH_NEED_BIND:
1023                                                         assert( 0 );
1024
1025                                                 default:
1026                                                         /* unrecoverable error */
1027                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1028                                                         rc = rs->sr_err = LDAP_OTHER;
1029                                                         goto finish;
1030                                                 }
1031                                         }
1032
1033                                         candidates[ i ].sr_err = rs->sr_err;
1034                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1035                                                 savepriv = op->o_private;
1036                                                 op->o_private = (void *)i;
1037                                                 send_ldap_result( op, rs );
1038                                                 op->o_private = savepriv;
1039                                                 goto finish;
1040                                         }
1041                                 }
1042
1043                                 /*
1044                                  * When no candidates are left,
1045                                  * the outer cycle finishes
1046                                  */
1047                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1048                                 assert( ncandidates > 0 );
1049                                 --ncandidates;
1050                                 rs->sr_err = candidates[ i ].sr_err;
1051                                 continue;
1052
1053                         default:
1054                                 /* only touch when activity actually took place... */
1055                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1056                                         msc->msc_time = op->o_time;
1057                                 }
1058                                 break;
1059                         }
1060
1061                         for ( msg = ldap_first_message( msc->msc_ld, res );
1062                                 msg != NULL;
1063                                 msg = ldap_next_message( msc->msc_ld, msg ) )
1064                         {
1065                                 rc = ldap_msgtype( msg );
1066                                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
1067                                         LDAPMessage     *e;
1068
1069                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1070                                                 /* don't retry any more... */
1071                                                 candidates[ i ].sr_type = REP_RESULT;
1072                                         }
1073
1074                                         is_ok++;
1075
1076                                         e = ldap_first_entry( msc->msc_ld, msg );
1077                                         savepriv = op->o_private;
1078                                         op->o_private = (void *)i;
1079                                         rs->sr_err = meta_send_entry( op, rs, mc, i, e );
1080
1081                                         switch ( rs->sr_err ) {
1082                                         case LDAP_SIZELIMIT_EXCEEDED:
1083                                                 savepriv = op->o_private;
1084                                                 op->o_private = (void *)i;
1085                                                 send_ldap_result( op, rs );
1086                                                 op->o_private = savepriv;
1087                                                 rs->sr_err = LDAP_SUCCESS;
1088                                                 ldap_msgfree( res );
1089                                                 res = NULL;
1090                                                 goto finish;
1091
1092                                         case LDAP_UNAVAILABLE:
1093                                                 rs->sr_err = LDAP_OTHER;
1094                                                 ldap_msgfree( res );
1095                                                 res = NULL;
1096                                                 goto finish;
1097                                         }
1098                                         op->o_private = savepriv;
1099
1100                                         /* don't wait any longer... */
1101                                         gotit = 1;
1102                                         save_tv.tv_sec = 0;
1103                                         save_tv.tv_usec = 0;
1104
1105                                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
1106                                         char            **references = NULL;
1107                                         int             cnt;
1108
1109                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1110                                                 /* don't retry any more... */
1111                                                 candidates[ i ].sr_type = REP_RESULT;
1112                                         }
1113
1114                                         is_ok++;
1115
1116                                         rc = ldap_parse_reference( msc->msc_ld, msg,
1117                                                         &references, &rs->sr_ctrls, 0 );
1118
1119                                         if ( rc != LDAP_SUCCESS ) {
1120                                                 continue;
1121                                         }
1122
1123                                         if ( references == NULL ) {
1124                                                 continue;
1125                                         }
1126
1127 #ifdef ENABLE_REWRITE
1128                                         dc.ctx = "referralDN";
1129 #else /* ! ENABLE_REWRITE */
1130                                         dc.tofrom = 0;
1131                                         dc.normalized = 0;
1132 #endif /* ! ENABLE_REWRITE */
1133
1134                                         /* FIXME: merge all and return at the end */
1135
1136                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1137                                                 ;
1138
1139                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1140
1141                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1142                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
1143                                         }
1144                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
1145
1146                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
1147
1148                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
1149                                                 /* ignore return value by now */
1150                                                 savepriv = op->o_private;
1151                                                 op->o_private = (void *)i;
1152                                                 ( void )send_search_reference( op, rs );
1153                                                 op->o_private = savepriv;
1154
1155                                                 ber_bvarray_free( rs->sr_ref );
1156                                                 rs->sr_ref = NULL;
1157                                         }
1158
1159                                         /* cleanup */
1160                                         if ( references ) {
1161                                                 ber_memvfree( (void **)references );
1162                                         }
1163
1164                                         if ( rs->sr_ctrls ) {
1165                                                 ldap_controls_free( rs->sr_ctrls );
1166                                                 rs->sr_ctrls = NULL;
1167                                         }
1168
1169                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
1170                                         char            buf[ SLAP_TEXT_BUFLEN ];
1171                                         char            **references = NULL;
1172
1173                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1174                                                 /* don't retry any more... */
1175                                                 candidates[ i ].sr_type = REP_RESULT;
1176                                         }
1177
1178                                         /* NOTE: ignores response controls
1179                                          * (and intermediate response controls
1180                                          * as well, except for those with search
1181                                          * references); this may not be correct,
1182                                          * but if they're not ignored then
1183                                          * back-meta would need to merge them
1184                                          * consistently (think of pagedResults...)
1185                                          */
1186                                         /* FIXME: response controls? */
1187                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
1188                                                 msg,
1189                                                 &candidates[ i ].sr_err,
1190                                                 (char **)&candidates[ i ].sr_matched,
1191                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
1192                                                 &references,
1193                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
1194                                                 0 );
1195                                         if ( rs->sr_err != LDAP_SUCCESS ) {
1196                                                 ldap_get_option( msc->msc_ld,
1197                                                         LDAP_OPT_ERROR_NUMBER,
1198                                                         &rs->sr_err );
1199                                                 sres = slap_map_api2result( rs );
1200                                                 candidates[ i ].sr_type = REP_RESULT;
1201                                                 ldap_msgfree( res );
1202                                                 res = NULL;
1203                                                 goto really_bad;
1204                                         }
1205
1206                                         /* massage matchedDN if need be */
1207                                         if ( candidates[ i ].sr_matched != NULL ) {
1208                                                 struct berval   match, mmatch;
1209
1210                                                 ber_str2bv( candidates[ i ].sr_matched,
1211                                                         0, 0, &match );
1212                                                 candidates[ i ].sr_matched = NULL;
1213
1214                                                 dc.ctx = "matchedDN";
1215                                                 dc.target = mi->mi_targets[ i ];
1216                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1217                                                         if ( mmatch.bv_val == match.bv_val ) {
1218                                                                 candidates[ i ].sr_matched
1219                                                                         = ch_strdup( mmatch.bv_val );
1220
1221                                                         } else {
1222                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1223                                                         }
1224
1225                                                         candidate_match++;
1226                                                 }
1227                                                 ldap_memfree( match.bv_val );
1228                                         }
1229
1230                                         /* add references to array */
1231                                         if ( references ) {
1232                                                 BerVarray       sr_ref;
1233                                                 int             cnt;
1234
1235                                                 for ( cnt = 0; references[ cnt ]; cnt++ )
1236                                                         ;
1237
1238                                                 sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1239
1240                                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
1241                                                         ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1242                                                 }
1243                                                 BER_BVZERO( &sr_ref[ cnt ] );
1244
1245                                                 ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1246
1247                                                 /* cleanup */
1248                                                 ber_memvfree( (void **)references );
1249
1250                                                 if ( rs->sr_v2ref == NULL ) {
1251                                                         rs->sr_v2ref = sr_ref;
1252
1253                                                 } else {
1254                                                         for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1255                                                                 ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1256                                                         }
1257                                                         ber_memfree( sr_ref );
1258                                                 }
1259                                         }
1260
1261                                         rs->sr_err = candidates[ i ].sr_err;
1262                                         sres = slap_map_api2result( rs );
1263
1264                                         if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1265                                                 snprintf( buf, sizeof( buf ),
1266                                                         "%s meta_back_search[%ld] "
1267                                                         "match=\"%s\" err=%ld",
1268                                                         op->o_log_prefix, i,
1269                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1270                                                         (long) candidates[ i ].sr_err );
1271                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1272                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1273
1274                                                 } else {
1275                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1276                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1277                                                 }
1278                                         }
1279
1280                                         switch ( sres ) {
1281                                         case LDAP_NO_SUCH_OBJECT:
1282                                                 /* is_ok is touched any time a valid
1283                                                  * (even intermediate) result is
1284                                                  * returned; as a consequence, if
1285                                                  * a candidate returns noSuchObject
1286                                                  * it is ignored and the candidate
1287                                                  * is simply demoted. */
1288                                                 if ( is_ok ) {
1289                                                         sres = LDAP_SUCCESS;
1290                                                 }
1291                                                 break;
1292
1293                                         case LDAP_SUCCESS:
1294                                         case LDAP_REFERRAL:
1295                                                 is_ok++;
1296                                                 break;
1297
1298                                         case LDAP_SIZELIMIT_EXCEEDED:
1299                                                 /* if a target returned sizelimitExceeded
1300                                                  * and the entry count is equal to the
1301                                                  * proxy's limit, the target would have
1302                                                  * returned more, and the error must be
1303                                                  * propagated to the client; otherwise,
1304                                                  * the target enforced a limit lower
1305                                                  * than what requested by the proxy;
1306                                                  * ignore it */
1307                                                 candidates[ i ].sr_err = rs->sr_err;
1308                                                 if ( rs->sr_nentries == op->ors_slimit
1309                                                         || META_BACK_ONERR_STOP( mi ) )
1310                                                 {
1311                                                         savepriv = op->o_private;
1312                                                         op->o_private = (void *)i;
1313                                                         send_ldap_result( op, rs );
1314                                                         op->o_private = savepriv;
1315                                                         ldap_msgfree( res );
1316                                                         res = NULL;
1317                                                         goto finish;
1318                                                 }
1319                                                 break;
1320
1321                                         default:
1322                                                 candidates[ i ].sr_err = rs->sr_err;
1323                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1324                                                         savepriv = op->o_private;
1325                                                         op->o_private = (void *)i;
1326                                                         send_ldap_result( op, rs );
1327                                                         op->o_private = savepriv;
1328                                                         ldap_msgfree( res );
1329                                                         res = NULL;
1330                                                         goto finish;
1331                                                 }
1332                                                 break;
1333                                         }
1334
1335                                         last = i;
1336                                         rc = 0;
1337
1338                                         /*
1339                                          * When no candidates are left,
1340                                          * the outer cycle finishes
1341                                          */
1342                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1343                                         --ncandidates;
1344
1345                                 } else if ( rc == LDAP_RES_BIND ) {
1346                                         meta_search_candidate_t retcode;
1347
1348                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1349                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1350                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1351                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1352                                         }
1353
1354                                         switch ( retcode ) {
1355                                         case META_SEARCH_CANDIDATE:
1356                                                 break;
1357
1358                                                 /* means that failed but onerr == continue */
1359                                         case META_SEARCH_NOT_CANDIDATE:
1360                                         case META_SEARCH_ERR:
1361                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1362                                                 --ncandidates;
1363
1364                                                 candidates[ i ].sr_err = rs->sr_err;
1365                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1366                                                         savepriv = op->o_private;
1367                                                         op->o_private = (void *)i;
1368                                                         send_ldap_result( op, rs );
1369                                                         op->o_private = savepriv;
1370                                                         ldap_msgfree( res );
1371                                                         res = NULL;
1372                                                         goto finish;
1373                                                 }
1374                                                 break;
1375
1376                                         default:
1377                                                 assert( 0 );
1378                                                 break;
1379                                         }
1380
1381                                 } else {
1382                                         assert( 0 );
1383                                         ldap_msgfree( res );
1384                                         res = NULL;
1385                                         goto really_bad;
1386                                 }
1387                         }
1388
1389                         ldap_msgfree( res );
1390                         res = NULL;
1391                 }
1392
1393                 /* check for abandon */
1394                 if ( op->o_abandon || doabandon ) {
1395                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1396                                 if ( candidates[ i ].sr_msgid >= 0 ) {
1397                                         if ( META_IS_BINDING( &candidates[ i ] ) ) {
1398                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1399                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1400                                                         /* if still binding, destroy */
1401
1402 #ifdef DEBUG_205
1403                                                         char buf[ SLAP_TEXT_BUFLEN ];
1404
1405                                                         snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
1406                                                                 "ldap_unbind_ext[%ld] mc=%p ld=%p",
1407                                                                 op->o_log_prefix, i, (void *)mc,
1408                                                                 (void *)mc->mc_conns[i].msc_ld );
1409
1410                                                         Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
1411 #endif /* DEBUG_205 */
1412
1413                                                         meta_clear_one_candidate( op, mc, i );
1414                                                 }
1415                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1416                                                 META_BINDING_CLEAR( &candidates[ i ] );
1417
1418                                         } else {
1419                                                 (void)meta_back_cancel( mc, op, rs,
1420                                                         candidates[ i ].sr_msgid, i,
1421                                                         LDAP_BACK_DONTSEND );
1422                                         }
1423
1424                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1425                                         assert( ncandidates > 0 );
1426                                         --ncandidates;
1427                                 }
1428                         }
1429
1430                         if ( op->o_abandon ) {
1431                                 rc = SLAPD_ABANDON;
1432                                 /* let send_ldap_result play cleanup handlers (ITS#4645) */
1433                                 break;
1434                         }
1435                 }
1436
1437                 /* if no entry was found during this loop,
1438                  * set a minimal timeout */
1439                 if ( ncandidates > 0 && gotit == 0 ) {
1440                         if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
1441                                 save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1442
1443                                 /* arbitrarily limit to something between 1 and 2 minutes */
1444                         } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
1445                                 || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
1446                         {
1447                                 /* double the timeout */
1448                                 lutil_timermul( &save_tv, 2, &save_tv );
1449                         }
1450
1451 #if 0
1452                         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1453                                 char    buf[ SLAP_TEXT_BUFLEN ];
1454
1455                                 snprintf( buf, sizeof( buf ), "%s %ld.%06ld %d/%d mc=%p",
1456                                         op->o_log_prefix, save_tv.tv_sec, save_tv.tv_usec,
1457                                         ncandidates, initial_candidates, mc );
1458                                 Debug( LDAP_DEBUG_TRACE, "### %s\n", buf, 0, 0 );
1459                                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1460                                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
1461                                                 continue;
1462                                         }
1463
1464                                         snprintf( buf, sizeof( buf ), "[%ld] ld=%p%s%s\n",
1465                                                 i,
1466                                                 mc->mc_conns[ i ].msc_ld,
1467                                                 ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND ) ?  " needbind" : "",
1468                                                 META_IS_BINDING( &candidates[ i ] ) ? " binding" : "" );
1469                                         Debug( LDAP_DEBUG_TRACE, "###    %s\n", buf, 0, 0 );
1470                                 }
1471                         }
1472 #endif
1473
1474                         if ( alreadybound == 0 ) {
1475 #if 0
1476                                 Debug( LDAP_DEBUG_TRACE, "### %s select(%ld.%06ld)\n",
1477                                         op->o_log_prefix, save_tv.tv_sec, save_tv.tv_usec );
1478 #endif
1479                                 tv = save_tv;
1480                                 (void)select( 0, NULL, NULL, NULL, &tv );
1481
1482                         } else {
1483                                 ldap_pvt_thread_yield();
1484                         }
1485                 }
1486         }
1487
1488         if ( rc == -1 ) {
1489                 /*
1490                  * FIXME: need a better strategy to handle errors
1491                  */
1492                 if ( mc ) {
1493                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1494                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1495                                 LDAP_BACK_SENDERR );
1496                 } else {
1497                         rc = rs->sr_err;
1498                 }
1499                 goto finish;
1500         }
1501
1502         /*
1503          * Rewrite the matched portion of the search base, if required
1504          *
1505          * FIXME: only the last one gets caught!
1506          */
1507         savepriv = op->o_private;
1508         op->o_private = (void *)(long)mi->mi_ntargets;
1509         if ( candidate_match > 0 ) {
1510                 struct berval   pmatched = BER_BVNULL;
1511
1512                 /* we use the first one */
1513                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1514                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1515                                         && candidates[ i ].sr_matched != NULL )
1516                         {
1517                                 struct berval   bv, pbv;
1518                                 int             rc;
1519
1520                                 /* if we got success, and this target
1521                                  * returned noSuchObject, and its suffix
1522                                  * is a superior of the searchBase,
1523                                  * ignore the matchedDN */
1524                                 if ( sres == LDAP_SUCCESS
1525                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1526                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1527                                 {
1528                                         free( (char *)candidates[ i ].sr_matched );
1529                                         candidates[ i ].sr_matched = NULL;
1530                                         continue;
1531                                 }
1532
1533                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1534                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1535
1536                                 if ( rc == LDAP_SUCCESS ) {
1537
1538                                         /* NOTE: if they all are superiors
1539                                          * of the baseDN, the shorter is also
1540                                          * superior of the longer... */
1541                                         if ( pbv.bv_len > pmatched.bv_len ) {
1542                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1543                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1544                                                 }
1545                                                 pmatched = pbv;
1546                                                 op->o_private = (void *)i;
1547
1548                                         } else {
1549                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1550                                         }
1551                                 }
1552
1553                                 if ( candidates[ i ].sr_matched != NULL ) {
1554                                         free( (char *)candidates[ i ].sr_matched );
1555                                         candidates[ i ].sr_matched = NULL;
1556                                 }
1557                         }
1558                 }
1559
1560                 if ( !BER_BVISNULL( &pmatched ) ) {
1561                         matched = pmatched.bv_val;
1562                 }
1563
1564         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1565                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1566         }
1567
1568 #if 0
1569         {
1570                 char    buf[ SLAP_TEXT_BUFLEN ];
1571                 char    cnd[ SLAP_TEXT_BUFLEN ];
1572                 int     i;
1573
1574                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1575                         if ( META_IS_CANDIDATE( &candidates[ i ] ) ) {
1576                                 cnd[ i ] = '*';
1577                         } else {
1578                                 cnd[ i ] = ' ';
1579                         }
1580                 }
1581                 cnd[ i ] = '\0';
1582
1583                 snprintf( buf, sizeof( buf ), "%s meta_back_search: is_scope=%d is_ok=%d cnd=\"%s\"\n",
1584                         op->o_log_prefix, initial_candidates, is_ok, cnd );
1585
1586                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1587         }
1588 #endif
1589
1590         /*
1591          * In case we returned at least one entry, we return LDAP_SUCCESS
1592          * otherwise, the latter error code we got
1593          */
1594
1595         if ( sres == LDAP_SUCCESS ) {
1596                 if ( rs->sr_v2ref ) {
1597                         sres = LDAP_REFERRAL;
1598                 }
1599
1600                 if ( META_BACK_ONERR_REPORT( mi ) ) {
1601                         /*
1602                          * Report errors, if any
1603                          *
1604                          * FIXME: we should handle error codes and return the more
1605                          * important/reasonable
1606                          */
1607                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1608                                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1609                                         continue;
1610                                 }
1611
1612                                 if ( candidates[ i ].sr_err != LDAP_SUCCESS
1613                                         && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
1614                                 {
1615                                         sres = candidates[ i ].sr_err;
1616                                         break;
1617                                 }
1618                         }
1619                 }
1620         }
1621
1622         rs->sr_err = sres;
1623         rs->sr_matched = matched;
1624         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1625         send_ldap_result( op, rs );
1626         op->o_private = savepriv;
1627         rs->sr_matched = NULL;
1628         rs->sr_ref = NULL;
1629
1630 finish:;
1631         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1632                 op->o_tmpfree( matched, op->o_tmpmemctx );
1633         }
1634
1635         if ( rs->sr_v2ref ) {
1636                 ber_bvarray_free( rs->sr_v2ref );
1637         }
1638
1639         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1640                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1641                         continue;
1642                 }
1643
1644                 if ( mc && META_IS_BINDING( &candidates[ i ] ) ) {
1645                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1646                         if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1647                                 assert( candidates[ i ].sr_msgid >= 0 );
1648                                 assert( mc->mc_conns[ i ].msc_ld != NULL );
1649
1650 #ifdef DEBUG_205
1651                                 Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
1652                                         "ldap_unbind_ext[%ld] ld=%p\n",
1653                                         op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
1654 #endif /* DEBUG_205 */
1655
1656                                 /* if still binding, destroy */
1657                                 meta_clear_one_candidate( op, mc, i );
1658                         }
1659                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1660                         META_BINDING_CLEAR( &candidates[ i ] );
1661                 }
1662
1663                 if ( candidates[ i ].sr_matched ) {
1664                         free( (char *)candidates[ i ].sr_matched );
1665                         candidates[ i ].sr_matched = NULL;
1666                 }
1667
1668                 if ( candidates[ i ].sr_text ) {
1669                         ldap_memfree( (char *)candidates[ i ].sr_text );
1670                         candidates[ i ].sr_text = NULL;
1671                 }
1672
1673                 if ( candidates[ i ].sr_ref ) {
1674                         ber_bvarray_free( candidates[ i ].sr_ref );
1675                         candidates[ i ].sr_ref = NULL;
1676                 }
1677
1678                 if ( candidates[ i ].sr_ctrls ) {
1679                         ldap_controls_free( candidates[ i ].sr_ctrls );
1680                         candidates[ i ].sr_ctrls = NULL;
1681                 }
1682
1683                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1684                         meta_back_quarantine( op, &candidates[ i ], i );
1685                 }
1686
1687                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1688                  * one contacted target never responded, invalidate the connection
1689                  * NOTE: should we quarantine the target as well?  right now, the connection
1690                  * is invalidated; the next time it will be recreated and the target
1691                  * will be quarantined if it cannot be contacted */
1692                 if ( mi->mi_idle_timeout != 0
1693                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1694                         && op->o_time > mc->mc_conns[ i ].msc_time )
1695                 {
1696                         /* don't let anyone else use this expired connection */
1697                         LDAP_BACK_CONN_TAINTED_SET( mc );
1698                 }
1699         }
1700
1701         if ( mc ) {
1702                 meta_back_release_conn( op, mc );
1703         }
1704
1705         return rs->sr_err;
1706 }
1707
1708 static int
1709 meta_send_entry(
1710         Operation       *op,
1711         SlapReply       *rs,
1712         metaconn_t      *mc,
1713         int             target,
1714         LDAPMessage     *e )
1715 {
1716         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1717         struct berval           a, mapped;
1718         Entry                   ent = { 0 };
1719         BerElement              ber = *e->lm_ber;
1720         Attribute               *attr, **attrp;
1721         struct berval           bdn,
1722                                 dn = BER_BVNULL;
1723         const char              *text;
1724         dncookie                dc;
1725         int                     rc;
1726
1727         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1728                 return LDAP_DECODING_ERROR;
1729         }
1730
1731         /*
1732          * Rewrite the dn of the result, if needed
1733          */
1734         dc.target = mi->mi_targets[ target ];
1735         dc.conn = op->o_conn;
1736         dc.rs = rs;
1737         dc.ctx = "searchResult";
1738
1739         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1740         if ( rs->sr_err != LDAP_SUCCESS) {
1741                 return rs->sr_err;
1742         }
1743
1744         /*
1745          * Note: this may fail if the target host(s) schema differs
1746          * from the one known to the meta, and a DN with unknown
1747          * attributes is returned.
1748          *
1749          * FIXME: should we log anything, or delegate to dnNormalize?
1750          */
1751         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1752                 op->o_tmpmemctx );
1753         if ( dn.bv_val != bdn.bv_val ) {
1754                 free( dn.bv_val );
1755         }
1756         BER_BVZERO( &dn );
1757
1758         if ( rc != LDAP_SUCCESS ) {
1759                 return LDAP_INVALID_DN_SYNTAX;
1760         }
1761
1762         /*
1763          * cache dn
1764          */
1765         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1766                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1767                                 &ent.e_nname, target );
1768         }
1769
1770         attrp = &ent.e_attrs;
1771
1772         dc.ctx = "searchAttrDN";
1773         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1774                 int                             last = 0;
1775                 slap_syntax_validate_func       *validate;
1776                 slap_syntax_transform_func      *pretty;
1777
1778                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1779                                 &a, &mapped, BACKLDAP_REMAP );
1780                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1781                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1782                         continue;
1783                 }
1784                 attr = attr_alloc( NULL );
1785                 if ( attr == NULL ) {
1786                         continue;
1787                 }
1788                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1789                                 != LDAP_SUCCESS) {
1790                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1791                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1792                         {
1793                                 char    buf[ SLAP_TEXT_BUFLEN ];
1794
1795                                 snprintf( buf, sizeof( buf ),
1796                                         "%s meta_send_entry(\"%s\"): "
1797                                         "slap_bv2undef_ad(%s): %s\n",
1798                                         op->o_log_prefix, ent.e_name.bv_val,
1799                                         mapped.bv_val, text );
1800
1801                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1802                                 attr_free( attr );
1803                                 continue;
1804                         }
1805                 }
1806
1807                 /* no subschemaSubentry */
1808                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1809                         || attr->a_desc == slap_schema.si_ad_entryDN )
1810                 {
1811
1812                         /*
1813                          * We eat target's subschemaSubentry because
1814                          * a search for this value is likely not
1815                          * to resolve to the appropriate backend;
1816                          * later, the local subschemaSubentry is
1817                          * added.
1818                          *
1819                          * We also eat entryDN because the frontend
1820                          * will reattach it without checking if already
1821                          * present...
1822                          */
1823                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1824
1825                         attr_free(attr);
1826                         continue;
1827                 }
1828
1829                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1830                                 || attr->a_vals == NULL )
1831                 {
1832                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1833
1834                 } else {
1835                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1836                                 ;
1837                 }
1838
1839                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1840                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1841
1842                 if ( !validate && !pretty ) {
1843                         attr_free( attr );
1844                         goto next_attr;
1845                 }
1846
1847                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1848                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1849                 {
1850                         struct berval   *bv;
1851
1852                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1853                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1854                                                 bv, &mapped, BACKLDAP_REMAP );
1855                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1856                                         free( bv->bv_val );
1857                                         BER_BVZERO( bv );
1858                                         if ( --last < 0 ) {
1859                                                 break;
1860                                         }
1861                                         *bv = attr->a_vals[ last ];
1862                                         BER_BVZERO( &attr->a_vals[ last ] );
1863                                         bv--;
1864
1865                                 } else if ( mapped.bv_val != bv->bv_val ) {
1866                                         free( bv->bv_val );
1867                                         ber_dupbv( bv, &mapped );
1868                                 }
1869                         }
1870                 /*
1871                  * It is necessary to try to rewrite attributes with
1872                  * dn syntax because they might be used in ACLs as
1873                  * members of groups; since ACLs are applied to the
1874                  * rewritten stuff, no dn-based subecj clause could
1875                  * be used at the ldap backend side (see
1876                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1877                  * The problem can be overcome by moving the dn-based
1878                  * ACLs to the target directory server, and letting
1879                  * everything pass thru the ldap backend.
1880                  */
1881                 } else {
1882                         int     i;
1883
1884                         if ( attr->a_desc->ad_type->sat_syntax ==
1885                                 slap_schema.si_syn_distinguishedName )
1886                         {
1887                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1888
1889                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1890                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1891
1892                         }
1893
1894                         for ( i = 0; i < last; i++ ) {
1895                                 struct berval   pval;
1896                                 int             rc;
1897
1898                                 if ( pretty ) {
1899                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1900                                                 &attr->a_vals[i], &pval, NULL );
1901
1902                                 } else {
1903                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1904                                                 &attr->a_vals[i] );
1905                                 }
1906
1907                                 if ( rc ) {
1908                                         LBER_FREE( attr->a_vals[i].bv_val );
1909                                         if ( --last == i ) {
1910                                                 BER_BVZERO( &attr->a_vals[ i ] );
1911                                                 break;
1912                                         }
1913                                         attr->a_vals[i] = attr->a_vals[last];
1914                                         BER_BVZERO( &attr->a_vals[last] );
1915                                         i--;
1916                                         continue;
1917                                 }
1918
1919                                 if ( pretty ) {
1920                                         LBER_FREE( attr->a_vals[i].bv_val );
1921                                         attr->a_vals[i] = pval;
1922                                 }
1923                         }
1924
1925                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
1926                                 attr_free( attr );
1927                                 goto next_attr;
1928                         }
1929                 }
1930
1931                 if ( last && attr->a_desc->ad_type->sat_equality &&
1932                         attr->a_desc->ad_type->sat_equality->smr_normalize )
1933                 {
1934                         int i;
1935
1936                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
1937                         for ( i = 0; i<last; i++ ) {
1938                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
1939                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
1940                                         attr->a_desc->ad_type->sat_syntax,
1941                                         attr->a_desc->ad_type->sat_equality,
1942                                         &attr->a_vals[i], &attr->a_nvals[i],
1943                                         NULL );
1944                         }
1945                         BER_BVZERO( &attr->a_nvals[i] );
1946
1947                 } else {
1948                         attr->a_nvals = attr->a_vals;
1949                 }
1950
1951                 *attrp = attr;
1952                 attrp = &attr->a_next;
1953 next_attr:;
1954         }
1955         rs->sr_entry = &ent;
1956         rs->sr_attrs = op->ors_attrs;
1957         rs->sr_flags = 0;
1958         rs->sr_err = LDAP_SUCCESS;
1959         rc = send_search_entry( op, rs );
1960         switch ( rc ) {
1961         case LDAP_UNAVAILABLE:
1962                 rc = LDAP_OTHER;
1963                 break;
1964         }
1965         rs->sr_entry = NULL;
1966         rs->sr_attrs = NULL;
1967
1968         if ( !BER_BVISNULL( &ent.e_name ) ) {
1969                 free( ent.e_name.bv_val );
1970                 BER_BVZERO( &ent.e_name );
1971         }
1972         if ( !BER_BVISNULL( &ent.e_nname ) ) {
1973                 free( ent.e_nname.bv_val );
1974                 BER_BVZERO( &ent.e_nname );
1975         }
1976         entry_clean( &ent );
1977
1978         return rc;
1979 }
1980