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 #define META_MSGID_CONNECTING   (-3)
  46
  47 static int
  48 meta_send_entry(
  49         Operation       *op,
  50         SlapReply       *rs,
  51         metaconn_t      *mc,
  52         int             i,
  53         LDAPMessage     *e );
  54
  55 typedef enum meta_search_candidate_t {
  56         META_SEARCH_UNDEFINED = -2,
  57         META_SEARCH_ERR = -1,
  58         META_SEARCH_NOT_CANDIDATE,
  59         META_SEARCH_CANDIDATE,
  60         META_SEARCH_BINDING,
  61         META_SEARCH_NEED_BIND,
  62         META_SEARCH_CONNECTING
  63 } meta_search_candidate_t;
  64
  65 /*
  66  * meta_search_dobind_init()
  67  *
  68  * initiates bind for a candidate target of a search.
  69  */
  70 static meta_search_candidate_t
  71 meta_search_dobind_init(
  72         Operation               *op,
  73         SlapReply               *rs,
  74         metaconn_t              **mcp,
  75         int                     candidate,
  76         SlapReply               *candidates )
  77 {
  78         metaconn_t              *mc = *mcp;
  79         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
  80         metatarget_t            *mt = mi->mi_targets[ candidate ];
  81         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
  82
  83         struct berval           binddn = msc->msc_bound_ndn,
  84                                 cred = msc->msc_cred;
  85         int                     method;
  86
  87         int                     rc;
  88
  89         meta_search_candidate_t retcode;
  90
  91         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n",
  92                 op->o_log_prefix, candidate, 0 );
  93
  94         /*
  95          * all the targets are already bound as pseudoroot
  96          */
  97         if ( mc->mc_authz_target == META_BOUND_ALL ) {
  98                 return META_SEARCH_CANDIDATE;
  99         }
 100
 101         retcode = META_SEARCH_BINDING;
 102         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 103         if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 104                 /* already bound (or anonymous) */
 105
 106 #ifdef DEBUG_205
 107                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 108                 int     bound = 0;
 109
 110                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 111                         bound = 1;
 112                 }
 113
 114                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p%s DN=\"%s\"",
 115                         (void *)mc, (void *)msc->msc_ld,
 116                         bound ? " bound" : " anonymous",
 117                         bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
 118                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 119                         op->o_log_prefix, candidate, buf );
 120 #endif /* DEBUG_205 */
 121
 122                 retcode = META_SEARCH_CANDIDATE;
 123
 124         } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
 125                 /* another thread is binding the target for this conn; wait */
 126
 127 #ifdef DEBUG_205
 128                 char    buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
 129
 130                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p needbind",
 131                         (void *)mc, (void *)msc->msc_ld );
 132                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 133                         op->o_log_prefix, candidate, buf );
 134 #endif /* DEBUG_205 */
 135
 136                 candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
 137                 retcode = META_SEARCH_NEED_BIND;
 138
 139         } else {
 140                 /* we'll need to bind the target for this conn */
 141
 142 #ifdef DEBUG_205
 143                 char buf[ SLAP_TEXT_BUFLEN ];
 144
 145                 snprintf( buf, sizeof( buf ), " mc=%p ld=%p binding",
 146                         (void *)mc, (void *)msc->msc_ld );
 147                 Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
 148                         op->o_log_prefix, candidate, buf );
 149 #endif /* DEBUG_205 */
 150
 151                 if ( msc->msc_ld == NULL ) {
 152                         /* for some reason (e.g. because formerly in "binding"
 153                          * state, with eventual connection expiration or invalidation)
 154                          * it was not initialized as expected */
 155
 156                         Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p ld=NULL\n",
 157                                 op->o_log_prefix, candidate, (void *)mc );
 158
 159                         rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
 160                                 LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND, 0 );
 161                         switch ( rc ) {
 162                         case LDAP_SUCCESS:
 163                                 assert( msc->msc_ld != NULL );
 164                                 break;
 165
 166                         case LDAP_SERVER_DOWN:
 167                         case LDAP_UNAVAILABLE:
 168                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 169                                 goto down;
 170
 171                         default:
 172                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 173                                 goto other;
 174                         }
 175                 }
 176
 177                 LDAP_BACK_CONN_BINDING_SET( msc );
 178         }
 179
 180         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 181
 182         if ( retcode != META_SEARCH_BINDING ) {
 183                 return retcode;
 184         }
 185
 186         /* NOTE: this obsoletes pseudorootdn */
 187         if ( op->o_conn != NULL &&
 188                 !op->o_do_not_cache &&
 189                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 190                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 191                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 192         {
 193                 rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
 194                 if ( rc != LDAP_SUCCESS ) {
 195                         goto down;
 196                 }
 197
 198                 /* NOTE: we copy things here, even if bind didn't succeed yet,
 199                  * because the connection is not shared until bind is over */
 200                 if ( !BER_BVISNULL( &binddn ) ) {
 201                         ber_bvreplace( &msc->msc_bound_ndn, &binddn );
 202                         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &cred ) ) {
 203                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 204                                         memset( msc->msc_cred.bv_val, 0,
 205                                                 msc->msc_cred.bv_len );
 206                                 }
 207                                 ber_bvreplace( &msc->msc_cred, &cred );
 208                         }
 209                 }
 210
 211                 if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
 212                         /* apparently, idassert was configured with SASL bind,
 213                          * so bind occurred inside meta_back_proxy_authz_cred() */
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 216                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 217                         return META_SEARCH_CANDIDATE;
 218                 }
 219
 220                 /* paranoid */
 221                 switch ( method ) {
 222                 case LDAP_AUTH_NONE:
 223                 case LDAP_AUTH_SIMPLE:
 224                         /* do a simple bind with binddn, cred */
 225                         break;
 226
 227                 default:
 228                         assert( 0 );
 229                         break;
 230                 }
 231         }
 232
 233         assert( msc->msc_ld != NULL );
 234
 235         /* connect must be async */
 236 retry:;
 237         ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_ON );
 238
 239         rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
 240                         NULL, NULL, &candidates[ candidate ].sr_msgid );
 241
 242 #ifdef DEBUG_205
 243         {
 244                 char buf[ SLAP_TEXT_BUFLEN ];
 245
 246                 snprintf( buf, sizeof( buf ), "meta_search_dobind_init[%d] mc=%p ld=%p rc=%d",
 247                         candidate, (void *)mc, (void *)mc->mc_conns[ candidate ].msc_ld, rc );
 248                 Debug( LDAP_DEBUG_ANY, "### %s %s\n",
 249                         op->o_log_prefix, buf, 0 );
 250         }
 251 #endif /* DEBUG_205 */
 252
 253         switch ( rc ) {
 254         case LDAP_SUCCESS:
 255                 assert( candidates[ candidate ].sr_msgid >= 0 );
 256                 META_BINDING_SET( &candidates[ candidate ] );
 257                 return META_SEARCH_BINDING;
 258
 259         case LDAP_X_CONNECTING:
 260                 /* must retry, same conn */
 261                 candidates[ candidate ].sr_msgid = META_MSGID_CONNECTING;
 262                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 263                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 264                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 265                 return META_SEARCH_CONNECTING;
 266
 267         case LDAP_SERVER_DOWN:
 268 down:;
 269                 /* This is the worst thing that could happen:
 270                  * the search will wait until the retry is over. */
 271                 if ( !META_IS_RETRYING( &candidates[ candidate ] ) ) {
 272                         META_RETRYING_SET( &candidates[ candidate ] );
 273
 274                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 275
 276                         assert( mc->mc_refcnt > 0 );
 277                         if ( LogTest( LDAP_DEBUG_ANY ) ) {
 278                                 char    buf[ SLAP_TEXT_BUFLEN ];
 279
 280                                 /* this lock is required; however,
 281                                  * it's invoked only when logging is on */
 282                                 ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 283                                 snprintf( buf, sizeof( buf ),
 284                                         "retrying URI=\"%s\" DN=\"%s\"",
 285                                         mt->mt_uri,
 286                                         BER_BVISNULL( &msc->msc_bound_ndn ) ?
 287                                                 "" : msc->msc_bound_ndn.bv_val );
 288                                 ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 289
 290                                 Debug( LDAP_DEBUG_ANY,
 291                                         "%s meta_search_dobind_init[%d]: %s.\n",
 292                                         op->o_log_prefix, candidate, buf );
 293                         }
 294
 295                         meta_clear_one_candidate( op, mc, candidate );
 296                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 297
 298                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 299
 300                         /* mc here must be the regular mc, reset and ready for init */
 301                         rc = meta_back_init_one_conn( op, rs, mc, candidate,
 302                                 LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );
 303
 304                         if ( rc == LDAP_SUCCESS ) {
 305                                 LDAP_BACK_CONN_BINDING_SET( msc );
 306                         }
 307
 308                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 309
 310                         if ( rc == LDAP_SUCCESS ) {
 311                                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 312                                 goto retry;
 313                         }
 314                 }
 315
 316                 if ( *mcp == NULL ) {
 317                         retcode = META_SEARCH_ERR;
 318                         rs->sr_err = LDAP_UNAVAILABLE;
 319                         break;
 320                 }
 321                 /* fall thru */
 322
 323         default:
 324 other:;
 325                 rs->sr_err = rc;
 326                 rc = slap_map_api2result( rs );
 327
 328                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 329                 meta_clear_one_candidate( op, mc, candidate );
 330                 candidates[ candidate ].sr_err = rc;
 331                 if ( META_BACK_ONERR_STOP( mi ) ) {
 332                         LDAP_BACK_CONN_TAINTED_SET( mc );
 333                         meta_back_release_conn_lock( mi, mc, 0 );
 334                         *mcp = NULL;
 335                         rs->sr_err = rc;
 336
 337                         retcode = META_SEARCH_ERR;
 338
 339                 } else {
 340                         retcode = META_SEARCH_NOT_CANDIDATE;
 341                 }
 342                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 343                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 344                 break;
 345         }
 346
 347         return retcode;
 348 }
 349
 350 static meta_search_candidate_t
 351 meta_search_dobind_result(
 352         Operation               *op,
 353         SlapReply               *rs,
 354         metaconn_t              **mcp,
 355         int                     candidate,
 356         SlapReply               *candidates,
 357         LDAPMessage             *res )
 358 {
 359         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 360         metaconn_t              *mc = *mcp;
 361         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 362
 363         meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
 364         int                     rc;
 365
 366         assert( msc->msc_ld != NULL );
 367
 368         /* FIXME: matched? referrals? response controls? */
 369         rc = ldap_parse_result( msc->msc_ld, res,
 370                 &candidates[ candidate ].sr_err,
 371                 NULL, NULL, NULL, NULL, 0 );
 372         if ( rc != LDAP_SUCCESS ) {
 373                 candidates[ candidate ].sr_err = rc;
 374
 375         } else {
 376                 rc = slap_map_api2result( &candidates[ candidate ] );
 377         }
 378
 379         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 380         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 381         if ( rc != LDAP_SUCCESS ) {
 382                 meta_clear_one_candidate( op, mc, candidate );
 383                 candidates[ candidate ].sr_err = rc;
 384                 if ( META_BACK_ONERR_STOP( mi ) ) {
 385                         LDAP_BACK_CONN_TAINTED_SET( mc );
 386                         meta_back_release_conn_lock( mi, mc, 0 );
 387                         *mcp = NULL;
 388                         retcode = META_SEARCH_ERR;
 389                         rs->sr_err = rc;
 390                 }
 391
 392         } else {
 393                 /* FIXME: check if bound as idassert authcDN! */
 394                 if ( BER_BVISNULL( &msc->msc_bound_ndn )
 395                         || BER_BVISEMPTY( &msc->msc_bound_ndn ) )
 396                 {
 397                         LDAP_BACK_CONN_ISANON_SET( msc );
 398
 399                 } else {
 400                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 401                 }
 402                 retcode = META_SEARCH_CANDIDATE;
 403
 404                 /* connect must be async */
 405                 ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_OFF );
 406         }
 407
 408         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 409         META_BINDING_CLEAR( &candidates[ candidate ] );
 410
 411         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 412
 413         return retcode;
 414 }
 415
 416 static meta_search_candidate_t
 417 meta_back_search_start(
 418         Operation               *op,
 419         SlapReply               *rs,
 420         dncookie                *dc,
 421         metaconn_t              **mcp,
 422         int                     candidate,
 423         SlapReply               *candidates )
 424 {
 425         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 426         metatarget_t            *mt = mi->mi_targets[ candidate ];
 427         metasingleconn_t        *msc = &(*mcp)->mc_conns[ candidate ];
 428         struct berval           realbase = op->o_req_dn;
 429         int                     realscope = op->ors_scope;
 430         struct berval           mbase = BER_BVNULL;
 431         struct berval           mfilter = BER_BVNULL;
 432         char                    **mapped_attrs = NULL;
 433         int                     rc;
 434         meta_search_candidate_t retcode;
 435         struct timeval          tv, *tvp = NULL;
 436         int                     nretries = 1;
 437         LDAPControl             **ctrls = NULL;
 438
 439         /* this should not happen; just in case... */
 440         if ( msc->msc_ld == NULL ) {
 441                 Debug( LDAP_DEBUG_ANY,
 442                         "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
 443                         op->o_log_prefix, candidate,
 444                         META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
 445                 candidates[ candidate ].sr_err = LDAP_OTHER;
 446                 if ( META_BACK_ONERR_STOP( mi ) ) {
 447                         return META_SEARCH_ERR;
 448                 }
 449                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 450                 return META_SEARCH_NOT_CANDIDATE;
 451         }
 452
 453         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
 454
 455         /*
 456          * modifies the base according to the scope, if required
 457          */
 458         if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
 459                 switch ( op->ors_scope ) {
 460                 case LDAP_SCOPE_SUBTREE:
 461                         /*
 462                          * make the target suffix the new base
 463                          * FIXME: this is very forgiving, because
 464                          * "illegal" searchBases may be turned
 465                          * into the suffix of the target; however,
 466                          * the requested searchBase already passed
 467                          * thru the candidate analyzer...
 468                          */
 469                         if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
 470                                 realbase = mt->mt_nsuffix;
 471                                 if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 472                                         realscope = LDAP_SCOPE_SUBORDINATE;
 473                                 }
 474
 475                         } else {
 476                                 /*
 477                                  * this target is no longer candidate
 478                                  */
 479                                 retcode = META_SEARCH_NOT_CANDIDATE;
 480                                 goto doreturn;
 481                         }
 482                         break;
 483
 484                 case LDAP_SCOPE_SUBORDINATE:
 485                 case LDAP_SCOPE_ONELEVEL:
 486                 {
 487                         struct berval   rdn = mt->mt_nsuffix;
 488                         rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
 489                         if ( dnIsOneLevelRDN( &rdn )
 490                                         && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
 491                         {
 492                                 /*
 493                                  * if there is exactly one level,
 494                                  * make the target suffix the new
 495                                  * base, and make scope "base"
 496                                  */
 497                                 realbase = mt->mt_nsuffix;
 498                                 if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
 499                                         if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 500                                                 realscope = LDAP_SCOPE_SUBORDINATE;
 501                                         } else {
 502                                                 realscope = LDAP_SCOPE_SUBTREE;
 503                                         }
 504                                 } else {
 505                                         realscope = LDAP_SCOPE_BASE;
 506                                 }
 507                                 break;
 508                         } /* else continue with the next case */
 509                 }
 510
 511                 case LDAP_SCOPE_BASE:
 512                         /*
 513                          * this target is no longer candidate
 514                          */
 515                         retcode = META_SEARCH_NOT_CANDIDATE;
 516                         goto doreturn;
 517                 }
 518         }
 519
 520         /* initiate dobind */
 521         retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
 522
 523         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 524
 525         if ( retcode != META_SEARCH_CANDIDATE ) {
 526                 goto doreturn;
 527         }
 528
 529         /*
 530          * Rewrite the search base, if required
 531          */
 532         dc->target = mt;
 533         dc->ctx = "searchBase";
 534         switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
 535         case LDAP_SUCCESS:
 536                 break;
 537
 538         case LDAP_UNWILLING_TO_PERFORM:
 539                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 540                 rs->sr_text = "Operation not allowed";
 541                 send_ldap_result( op, rs );
 542                 retcode = META_SEARCH_ERR;
 543                 goto doreturn;
 544
 545         default:
 546
 547                 /*
 548                  * this target is no longer candidate
 549                  */
 550                 retcode = META_SEARCH_NOT_CANDIDATE;
 551                 goto doreturn;
 552         }
 553
 554         /*
 555          * Maps filter
 556          */
 557         rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
 558                         &mfilter, BACKLDAP_MAP );
 559         switch ( rc ) {
 560         case LDAP_SUCCESS:
 561                 break;
 562
 563         case LDAP_COMPARE_FALSE:
 564         default:
 565                 /*
 566                  * this target is no longer candidate
 567                  */
 568                 retcode = META_SEARCH_NOT_CANDIDATE;
 569                 goto done;
 570         }
 571
 572         /*
 573          * Maps required attributes
 574          */
 575         rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
 576                         op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
 577         if ( rc != LDAP_SUCCESS ) {
 578                 /*
 579                  * this target is no longer candidate
 580                  */
 581                 retcode = META_SEARCH_NOT_CANDIDATE;
 582                 goto done;
 583         }
 584
 585         /* should we check return values? */
 586         if ( op->ors_deref != -1 ) {
 587                 assert( msc->msc_ld != NULL );
 588                 (void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
 589                                 ( void * )&op->ors_deref );
 590         }
 591
 592         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 593                 tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
 594                 tv.tv_usec = 0;
 595                 tvp = &tv;
 596         }
 597
 598 retry:;
 599         ctrls = op->o_ctrls;
 600         if ( ldap_back_proxy_authz_ctrl( &msc->msc_bound_ndn,
 601                 mt->mt_version, &mt->mt_idassert, op, rs, &ctrls )
 602                 != LDAP_SUCCESS )
 603         {
 604                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 605                 retcode = META_SEARCH_NOT_CANDIDATE;
 606                 goto done;
 607         }
 608
 609         /*
 610          * Starts the search
 611          */
 612         assert( msc->msc_ld != NULL );
 613         rc = ldap_search_ext( msc->msc_ld,
 614                         mbase.bv_val, realscope, mfilter.bv_val,
 615                         mapped_attrs, op->ors_attrsonly,
 616                         ctrls, NULL, tvp, op->ors_slimit,
 617                         &candidates[ candidate ].sr_msgid );
 618         switch ( rc ) {
 619         case LDAP_SUCCESS:
 620                 retcode = META_SEARCH_CANDIDATE;
 621                 break;
 622
 623         case LDAP_SERVER_DOWN:
 624                 if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
 625                         nretries = 0;
 626                         /* if the identity changed, there might be need to re-authz */
 627                         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 628                         goto retry;
 629                 }
 630
 631                 if ( *mcp == NULL ) {
 632                         retcode = META_SEARCH_ERR;
 633                         break;
 634                 }
 635                 /* fall thru */
 636
 637         default:
 638                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 639                 retcode = META_SEARCH_NOT_CANDIDATE;
 640         }
 641
 642 done:;
 643         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 644
 645         if ( mapped_attrs ) {
 646                 free( mapped_attrs );
 647         }
 648         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 649                 free( mfilter.bv_val );
 650         }
 651         if ( mbase.bv_val != realbase.bv_val ) {
 652                 free( mbase.bv_val );
 653         }
 654
 655 doreturn:;
 656         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 657
 658         return retcode;
 659 }
 660
 661 int
 662 meta_back_search( Operation *op, SlapReply *rs )
 663 {
 664         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 665         metaconn_t      *mc;
 666         struct timeval  save_tv = { 0, 0 },
 667                         tv;
 668         time_t          stoptime = (time_t)(-1),
 669                         lastres_time = slap_get_time(),
 670                         timeout = 0;
 671         int             rc = 0, sres = LDAP_SUCCESS;
 672         char            *matched = NULL;
 673         int             last = 0, ncandidates = 0,
 674                         initial_candidates = 0, candidate_match = 0,
 675                         needbind = 0;
 676         ldap_back_send_t        sendok = LDAP_BACK_SENDERR;
 677         long            i;
 678         dncookie        dc;
 679         int             is_ok = 0;
 680         void            *savepriv;
 681         SlapReply       *candidates = meta_back_candidates_get( op );
 682
 683         /*
 684          * controls are set in ldap_back_dobind()
 685          *
 686          * FIXME: in case of values return filter, we might want
 687          * to map attrs and maybe rewrite value
 688          */
 689 getconn:;
 690         mc = meta_back_getconn( op, rs, NULL, sendok );
 691         if ( !mc ) {
 692                 return rs->sr_err;
 693         }
 694
 695         dc.conn = op->o_conn;
 696         dc.rs = rs;
 697
 698         /*
 699          * Inits searches
 700          */
 701         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 702                 /* reset sr_msgid; it is used in most loops
 703                  * to check if that target is still to be considered */
 704                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 705
 706                 /* a target is marked as candidate by meta_back_getconn();
 707                  * if for any reason (an error, it's over or so) it is
 708                  * no longer active, sr_msgid is set to META_MSGID_IGNORE
 709                  * but it remains candidate, which means it has been active
 710                  * at some point during the operation.  This allows to
 711                  * use its response code and more to compute the final
 712                  * response */
 713                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 714                         continue;
 715                 }
 716
 717                 candidates[ i ].sr_matched = NULL;
 718                 candidates[ i ].sr_text = NULL;
 719                 candidates[ i ].sr_ref = NULL;
 720                 candidates[ i ].sr_ctrls = NULL;
 721
 722                 /* get largest timeout among candidates */
 723                 if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
 724                         && mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
 725                 {
 726                         timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
 727                 }
 728         }
 729
 730         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 731                 if ( !META_IS_CANDIDATE( &candidates[ i ] )
 732                         || candidates[ i ].sr_err != LDAP_SUCCESS )
 733                 {
 734                         continue;
 735                 }
 736
 737                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 738                 {
 739                 case META_SEARCH_NOT_CANDIDATE:
 740                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 741                         break;
 742
 743                 case META_SEARCH_NEED_BIND:
 744                         ++needbind;
 745                         /* fallthru */
 746
 747                 case META_SEARCH_CONNECTING:
 748                 case META_SEARCH_CANDIDATE:
 749                 case META_SEARCH_BINDING:
 750                         candidates[ i ].sr_type = REP_INTERMEDIATE;
 751                         ++ncandidates;
 752                         break;
 753
 754                 case META_SEARCH_ERR:
 755                         savepriv = op->o_private;
 756                         op->o_private = (void *)i;
 757                         send_ldap_result( op, rs );
 758                         op->o_private = savepriv;
 759                         rc = -1;
 760                         goto finish;
 761
 762                 default:
 763                         assert( 0 );
 764                         break;
 765                 }
 766         }
 767
 768         if ( ncandidates > 0 && needbind == ncandidates ) {
 769                 /*
 770                  * give up the second time...
 771                  *
 772                  * NOTE: this should not occur the second time, since a fresh
 773                  * connection has ben created; however, targets may also
 774                  * need bind because the bind timed out or so.
 775                  */
 776                 if ( sendok & LDAP_BACK_BINDING ) {
 777                         Debug( LDAP_DEBUG_ANY,
 778                                 "%s meta_back_search: unable to initialize conn\n",
 779                                 op->o_log_prefix, 0, 0 );
 780                         rs->sr_err = LDAP_UNAVAILABLE;
 781                         rs->sr_text = "unable to initialize connection to remote targets";
 782                         send_ldap_result( op, rs );
 783                         rc = -1;
 784                         goto finish;
 785                 }
 786
 787                 /* FIXME: better create a separate connection? */
 788                 sendok |= LDAP_BACK_BINDING;
 789
 790 #ifdef DEBUG_205
 791                 Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
 792                         op->o_log_prefix, (void *)mc, 0 );
 793 #endif /* DEBUG_205 */
 794
 795                 meta_back_release_conn( mi, mc );
 796                 mc = NULL;
 797
 798                 needbind = 0;
 799                 ncandidates = 0;
 800
 801                 goto getconn;
 802         }
 803
 804         initial_candidates = ncandidates;
 805
 806         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 807                 char    cnd[ SLAP_TEXT_BUFLEN ];
 808                 int     c;
 809
 810                 for ( c = 0; c < mi->mi_ntargets; c++ ) {
 811                         if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
 812                                 cnd[ c ] = '*';
 813                         } else {
 814                                 cnd[ c ] = ' ';
 815                         }
 816                 }
 817                 cnd[ c ] = '\0';
 818
 819                 Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
 820                         "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
 821         }
 822
 823         if ( initial_candidates == 0 ) {
 824                 /* NOTE: here we are not sending any matchedDN;
 825                  * this is intended, because if the back-meta
 826                  * is serving this search request, but no valid
 827                  * candidate could be looked up, it means that
 828                  * there is a hole in the mapping of the targets
 829                  * and thus no knowledge of any remote superior
 830                  * is available */
 831                 Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
 832                         "base=\"%s\" scope=%d: "
 833                         "no candidate could be selected\n",
 834                         op->o_log_prefix, op->o_req_dn.bv_val,
 835                         op->ors_scope );
 836
 837                 /* FIXME: we're sending the first error we encounter;
 838                  * maybe we should pick the worst... */
 839                 rc = LDAP_NO_SUCH_OBJECT;
 840                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 841                         if ( META_IS_CANDIDATE( &candidates[ i ] )
 842                                 && candidates[ i ].sr_err != LDAP_SUCCESS )
 843                         {
 844                                 rc = candidates[ i ].sr_err;
 845                                 break;
 846                         }
 847                 }
 848
 849                 send_ldap_error( op, rs, rc, NULL );
 850
 851                 goto finish;
 852         }
 853
 854         /* We pull apart the ber result, stuff it into a slapd entry, and
 855          * let send_search_entry stuff it back into ber format. Slow & ugly,
 856          * but this is necessary for version matching, and for ACL processing.
 857          */
 858
 859         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 860                 stoptime = op->o_time + op->ors_tlimit;
 861         }
 862
 863         /*
 864          * In case there are no candidates, no cycle takes place...
 865          *
 866          * FIXME: we might use a queue, to better balance the load
 867          * among the candidates
 868          */
 869         for ( rc = 0; ncandidates > 0; ) {
 870                 int     gotit = 0,
 871                         doabandon = 0,
 872                         alreadybound = ncandidates;
 873                 time_t  curr_time = 0;
 874
 875                 /* check timeout */
 876                 if ( timeout && lastres_time > 0
 877                         && ( slap_get_time() - lastres_time ) > timeout )
 878                 {
 879                         doabandon = 1;
 880                         rs->sr_text = "Operation timed out";
 881                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 882                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 883                         savepriv = op->o_private;
 884                         op->o_private = (void *)i;
 885                         send_ldap_result( op, rs );
 886                         op->o_private = savepriv;
 887                         goto finish;
 888                 }
 889
 890                 /* check time limit */
 891                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 892                                 && slap_get_time() > stoptime )
 893                 {
 894                         doabandon = 1;
 895                         rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 896                         savepriv = op->o_private;
 897                         op->o_private = (void *)i;
 898                         send_ldap_result( op, rs );
 899                         op->o_private = savepriv;
 900                         goto finish;
 901                 }
 902
 903                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 904                         meta_search_candidate_t retcode = META_SEARCH_UNDEFINED;
 905                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 906                         LDAPMessage             *res = NULL, *msg;
 907
 908                         /* if msgid is invalid, don't ldap_result() */
 909                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
 910                                 continue;
 911                         }
 912
 913                         /* if target still needs bind, retry */
 914                         if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND
 915                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
 916                         {
 917                                 /* initiate dobind */
 918                                 retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
 919
 920                                 Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
 921                                         op->o_log_prefix, i, retcode );
 922
 923                                 switch ( retcode ) {
 924                                 case META_SEARCH_NEED_BIND:
 925                                         alreadybound--;
 926                                         /* fallthru */
 927
 928                                 case META_SEARCH_CONNECTING:
 929                                 case META_SEARCH_BINDING:
 930                                         break;
 931
 932                                 case META_SEARCH_ERR:
 933                                         candidates[ i ].sr_err = rs->sr_err;
 934                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 935                                                 savepriv = op->o_private;
 936                                                 op->o_private = (void *)i;
 937                                                 send_ldap_result( op, rs );
 938                                                 op->o_private = savepriv;
 939                                                 goto finish;
 940                                         }
 941                                         /* fallthru */
 942
 943                                 case META_SEARCH_NOT_CANDIDATE:
 944                                         /*
 945                                          * When no candidates are left,
 946                                          * the outer cycle finishes
 947                                          */
 948                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 949                                         assert( ncandidates > 0 );
 950                                         --ncandidates;
 951                                         break;
 952
 953                                 case META_SEARCH_CANDIDATE:
 954                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 955                                         switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 956                                         {
 957                                         case META_SEARCH_CANDIDATE:
 958                                                 assert( candidates[ i ].sr_msgid >= 0 );
 959                                                 break;
 960
 961                                         case META_SEARCH_ERR:
 962                                                 candidates[ i ].sr_err = rs->sr_err;
 963                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
 964                                                         savepriv = op->o_private;
 965                                                         op->o_private = (void *)i;
 966                                                         send_ldap_result( op, rs );
 967                                                         op->o_private = savepriv;
 968                                                         goto finish;
 969                                                 }
 970                                                 /* fallthru */
 971
 972                                         case META_SEARCH_NOT_CANDIDATE:
 973                                                 /* means that meta_back_search_start()
 974                                                  * failed but onerr == continue */
 975                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 976                                                 assert( ncandidates > 0 );
 977                                                 --ncandidates;
 978                                                 break;
 979
 980                                         default:
 981                                                 /* impossible */
 982                                                 assert( 0 );
 983                                                 break;
 984                                         }
 985                                         break;
 986
 987                                 default:
 988                                         /* impossible */
 989                                         assert( 0 );
 990                                         break;
 991                                 }
 992                                 continue;
 993                         }
 994
 995                         /* check for abandon */
 996                         if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
 997                                 break;
 998                         }
 999
1000 #ifdef DEBUG_205
1001                         if ( msc->msc_ld == NULL ) {
1002                                 char    buf[ SLAP_TEXT_BUFLEN ];
1003
1004                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1005                                 snprintf( buf, sizeof( buf ),
1006                                         "%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
1007                                         op->o_log_prefix, (long)i, (void *)mc,
1008                                         candidates[ i ].sr_msgid,
1009                                         META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
1010                                         LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
1011                                         META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
1012                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1013
1014                                 Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
1015                         }
1016 #endif /* DEBUG_205 */
1017
1018                         /*
1019                          * FIXME: handle time limit as well?
1020                          * Note that target servers are likely
1021                          * to handle it, so at some time we'll
1022                          * get a LDAP_TIMELIMIT_EXCEEDED from
1023                          * one of them ...
1024                          */
1025                         tv = save_tv;
1026                         rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
1027                                         LDAP_MSG_RECEIVED, &tv, &res );
1028                         switch ( rc ) {
1029                         case 0:
1030                                 /* FIXME: res should not need to be freed */
1031                                 assert( res == NULL );
1032                                 continue;
1033
1034                         case -1:
1035 really_bad:;
1036                                 /* something REALLY bad happened! */
1037                                 if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1038                                         candidates[ i ].sr_type = REP_RESULT;
1039
1040                                         if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
1041                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1042                                                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
1043                                                 {
1044                                                         /* means that failed but onerr == continue */
1045                                                 case META_SEARCH_NOT_CANDIDATE:
1046                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1047
1048                                                         assert( ncandidates > 0 );
1049                                                         --ncandidates;
1050
1051                                                         candidates[ i ].sr_err = rs->sr_err;
1052                                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1053                                                                 savepriv = op->o_private;
1054                                                                 op->o_private = (void *)i;
1055                                                                 send_ldap_result( op, rs );
1056                                                                 op->o_private = savepriv;
1057                                                                 goto finish;
1058                                                         }
1059                                                         /* fall thru */
1060
1061                                                 case META_SEARCH_CANDIDATE:
1062                                                         /* get back into business... */
1063                                                         continue;
1064
1065                                                 case META_SEARCH_BINDING:
1066                                                 case META_SEARCH_CONNECTING:
1067                                                 case META_SEARCH_NEED_BIND:
1068                                                 case META_SEARCH_UNDEFINED:
1069                                                         assert( 0 );
1070
1071                                                 default:
1072                                                         /* unrecoverable error */
1073                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1074                                                         rc = rs->sr_err = LDAP_OTHER;
1075                                                         goto finish;
1076                                                 }
1077                                         }
1078
1079                                         candidates[ i ].sr_err = rs->sr_err;
1080                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1081                                                 savepriv = op->o_private;
1082                                                 op->o_private = (void *)i;
1083                                                 send_ldap_result( op, rs );
1084                                                 op->o_private = savepriv;
1085                                                 goto finish;
1086                                         }
1087                                 }
1088
1089                                 /*
1090                                  * When no candidates are left,
1091                                  * the outer cycle finishes
1092                                  */
1093                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1094                                 assert( ncandidates > 0 );
1095                                 --ncandidates;
1096                                 rs->sr_err = candidates[ i ].sr_err;
1097                                 continue;
1098
1099                         default:
1100                                 lastres_time = slap_get_time();
1101
1102                                 /* only touch when activity actually took place... */
1103                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < lastres_time ) {
1104                                         msc->msc_time = lastres_time;
1105                                 }
1106                                 break;
1107                         }
1108
1109                         for ( msg = ldap_first_message( msc->msc_ld, res );
1110                                 msg != NULL;
1111                                 msg = ldap_next_message( msc->msc_ld, msg ) )
1112                         {
1113                                 rc = ldap_msgtype( msg );
1114                                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
1115                                         LDAPMessage     *e;
1116
1117                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1118                                                 /* don't retry any more... */
1119                                                 candidates[ i ].sr_type = REP_RESULT;
1120                                         }
1121
1122                                         is_ok++;
1123
1124                                         e = ldap_first_entry( msc->msc_ld, msg );
1125                                         savepriv = op->o_private;
1126                                         op->o_private = (void *)i;
1127                                         rs->sr_err = meta_send_entry( op, rs, mc, i, e );
1128
1129                                         switch ( rs->sr_err ) {
1130                                         case LDAP_SIZELIMIT_EXCEEDED:
1131                                                 savepriv = op->o_private;
1132                                                 op->o_private = (void *)i;
1133                                                 send_ldap_result( op, rs );
1134                                                 op->o_private = savepriv;
1135                                                 rs->sr_err = LDAP_SUCCESS;
1136                                                 ldap_msgfree( res );
1137                                                 res = NULL;
1138                                                 goto finish;
1139
1140                                         case LDAP_UNAVAILABLE:
1141                                                 rs->sr_err = LDAP_OTHER;
1142                                                 ldap_msgfree( res );
1143                                                 res = NULL;
1144                                                 goto finish;
1145                                         }
1146                                         op->o_private = savepriv;
1147
1148                                         /* don't wait any longer... */
1149                                         gotit = 1;
1150                                         save_tv.tv_sec = 0;
1151                                         save_tv.tv_usec = 0;
1152
1153                                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
1154                                         char            **references = NULL;
1155                                         int             cnt;
1156
1157                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1158                                                 /* don't retry any more... */
1159                                                 candidates[ i ].sr_type = REP_RESULT;
1160                                         }
1161
1162                                         is_ok++;
1163
1164                                         rc = ldap_parse_reference( msc->msc_ld, msg,
1165                                                         &references, &rs->sr_ctrls, 0 );
1166
1167                                         if ( rc != LDAP_SUCCESS ) {
1168                                                 continue;
1169                                         }
1170
1171                                         if ( references == NULL ) {
1172                                                 continue;
1173                                         }
1174
1175 #ifdef ENABLE_REWRITE
1176                                         dc.ctx = "referralDN";
1177 #else /* ! ENABLE_REWRITE */
1178                                         dc.tofrom = 0;
1179                                         dc.normalized = 0;
1180 #endif /* ! ENABLE_REWRITE */
1181
1182                                         /* FIXME: merge all and return at the end */
1183
1184                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1185                                                 ;
1186
1187                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1188
1189                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1190                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
1191                                         }
1192                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
1193
1194                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
1195
1196                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
1197                                                 /* ignore return value by now */
1198                                                 savepriv = op->o_private;
1199                                                 op->o_private = (void *)i;
1200                                                 ( void )send_search_reference( op, rs );
1201                                                 op->o_private = savepriv;
1202
1203                                                 ber_bvarray_free( rs->sr_ref );
1204                                                 rs->sr_ref = NULL;
1205                                         }
1206
1207                                         /* cleanup */
1208                                         if ( references ) {
1209                                                 ber_memvfree( (void **)references );
1210                                         }
1211
1212                                         if ( rs->sr_ctrls ) {
1213                                                 ldap_controls_free( rs->sr_ctrls );
1214                                                 rs->sr_ctrls = NULL;
1215                                         }
1216
1217                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
1218                                         char            buf[ SLAP_TEXT_BUFLEN ];
1219                                         char            **references = NULL;
1220
1221                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1222                                                 /* don't retry any more... */
1223                                                 candidates[ i ].sr_type = REP_RESULT;
1224                                         }
1225
1226                                         /* NOTE: ignores response controls
1227                                          * (and intermediate response controls
1228                                          * as well, except for those with search
1229                                          * references); this may not be correct,
1230                                          * but if they're not ignored then
1231                                          * back-meta would need to merge them
1232                                          * consistently (think of pagedResults...)
1233                                          */
1234                                         /* FIXME: response controls? */
1235                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
1236                                                 msg,
1237                                                 &candidates[ i ].sr_err,
1238                                                 (char **)&candidates[ i ].sr_matched,
1239                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
1240                                                 &references,
1241                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
1242                                                 0 );
1243                                         if ( rs->sr_err != LDAP_SUCCESS ) {
1244                                                 ldap_get_option( msc->msc_ld,
1245                                                         LDAP_OPT_ERROR_NUMBER,
1246                                                         &rs->sr_err );
1247                                                 sres = slap_map_api2result( rs );
1248                                                 candidates[ i ].sr_type = REP_RESULT;
1249                                                 ldap_msgfree( res );
1250                                                 res = NULL;
1251                                                 goto really_bad;
1252                                         }
1253
1254                                         /* massage matchedDN if need be */
1255                                         if ( candidates[ i ].sr_matched != NULL ) {
1256                                                 struct berval   match, mmatch;
1257
1258                                                 ber_str2bv( candidates[ i ].sr_matched,
1259                                                         0, 0, &match );
1260                                                 candidates[ i ].sr_matched = NULL;
1261
1262                                                 dc.ctx = "matchedDN";
1263                                                 dc.target = mi->mi_targets[ i ];
1264                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1265                                                         if ( mmatch.bv_val == match.bv_val ) {
1266                                                                 candidates[ i ].sr_matched
1267                                                                         = ch_strdup( mmatch.bv_val );
1268
1269                                                         } else {
1270                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1271                                                         }
1272
1273                                                         candidate_match++;
1274                                                 }
1275                                                 ldap_memfree( match.bv_val );
1276                                         }
1277
1278                                         /* add references to array */
1279                                         if ( references ) {
1280                                                 BerVarray       sr_ref;
1281                                                 int             cnt;
1282
1283                                                 for ( cnt = 0; references[ cnt ]; cnt++ )
1284                                                         ;
1285
1286                                                 sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1287
1288                                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
1289                                                         ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1290                                                 }
1291                                                 BER_BVZERO( &sr_ref[ cnt ] );
1292
1293                                                 ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1294
1295                                                 /* cleanup */
1296                                                 ber_memvfree( (void **)references );
1297
1298                                                 if ( rs->sr_v2ref == NULL ) {
1299                                                         rs->sr_v2ref = sr_ref;
1300
1301                                                 } else {
1302                                                         for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1303                                                                 ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1304                                                         }
1305                                                         ber_memfree( sr_ref );
1306                                                 }
1307                                         }
1308
1309                                         rs->sr_err = candidates[ i ].sr_err;
1310                                         sres = slap_map_api2result( rs );
1311
1312                                         if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1313                                                 snprintf( buf, sizeof( buf ),
1314                                                         "%s meta_back_search[%ld] "
1315                                                         "match=\"%s\" err=%ld",
1316                                                         op->o_log_prefix, i,
1317                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1318                                                         (long) candidates[ i ].sr_err );
1319                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1320                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1321
1322                                                 } else {
1323                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1324                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1325                                                 }
1326                                         }
1327
1328                                         switch ( sres ) {
1329                                         case LDAP_NO_SUCH_OBJECT:
1330                                                 /* is_ok is touched any time a valid
1331                                                  * (even intermediate) result is
1332                                                  * returned; as a consequence, if
1333                                                  * a candidate returns noSuchObject
1334                                                  * it is ignored and the candidate
1335                                                  * is simply demoted. */
1336                                                 if ( is_ok ) {
1337                                                         sres = LDAP_SUCCESS;
1338                                                 }
1339                                                 break;
1340
1341                                         case LDAP_SUCCESS:
1342                                         case LDAP_REFERRAL:
1343                                                 is_ok++;
1344                                                 break;
1345
1346                                         case LDAP_SIZELIMIT_EXCEEDED:
1347                                                 /* if a target returned sizelimitExceeded
1348                                                  * and the entry count is equal to the
1349                                                  * proxy's limit, the target would have
1350                                                  * returned more, and the error must be
1351                                                  * propagated to the client; otherwise,
1352                                                  * the target enforced a limit lower
1353                                                  * than what requested by the proxy;
1354                                                  * ignore it */
1355                                                 candidates[ i ].sr_err = rs->sr_err;
1356                                                 if ( rs->sr_nentries == op->ors_slimit
1357                                                         || META_BACK_ONERR_STOP( mi ) )
1358                                                 {
1359                                                         savepriv = op->o_private;
1360                                                         op->o_private = (void *)i;
1361                                                         send_ldap_result( op, rs );
1362                                                         op->o_private = savepriv;
1363                                                         ldap_msgfree( res );
1364                                                         res = NULL;
1365                                                         goto finish;
1366                                                 }
1367                                                 break;
1368
1369                                         default:
1370                                                 candidates[ i ].sr_err = rs->sr_err;
1371                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1372                                                         savepriv = op->o_private;
1373                                                         op->o_private = (void *)i;
1374                                                         send_ldap_result( op, rs );
1375                                                         op->o_private = savepriv;
1376                                                         ldap_msgfree( res );
1377                                                         res = NULL;
1378                                                         goto finish;
1379                                                 }
1380                                                 break;
1381                                         }
1382
1383                                         last = i;
1384                                         rc = 0;
1385
1386                                         /*
1387                                          * When no candidates are left,
1388                                          * the outer cycle finishes
1389                                          */
1390                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1391                                         assert( ncandidates > 0 );
1392                                         --ncandidates;
1393
1394                                 } else if ( rc == LDAP_RES_BIND ) {
1395                                         meta_search_candidate_t retcode;
1396
1397                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1398                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1399                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1400                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1401                                         }
1402
1403                                         switch ( retcode ) {
1404                                         case META_SEARCH_CANDIDATE:
1405                                                 break;
1406
1407                                                 /* means that failed but onerr == continue */
1408                                         case META_SEARCH_NOT_CANDIDATE:
1409                                         case META_SEARCH_ERR:
1410                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1411                                                 assert( ncandidates > 0 );
1412                                                 --ncandidates;
1413
1414                                                 candidates[ i ].sr_err = rs->sr_err;
1415                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1416                                                         savepriv = op->o_private;
1417                                                         op->o_private = (void *)i;
1418                                                         send_ldap_result( op, rs );
1419                                                         op->o_private = savepriv;
1420                                                         ldap_msgfree( res );
1421                                                         res = NULL;
1422                                                         goto finish;
1423                                                 }
1424                                                 goto free_message;
1425
1426                                         default:
1427                                                 assert( 0 );
1428                                                 break;
1429                                         }
1430
1431                                 } else {
1432                                         assert( 0 );
1433                                         ldap_msgfree( res );
1434                                         res = NULL;
1435                                         goto really_bad;
1436                                 }
1437                         }
1438
1439 free_message:;
1440                         ldap_msgfree( res );
1441                         res = NULL;
1442                 }
1443
1444                 /* check for abandon */
1445                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
1446                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1447                                 if ( candidates[ i ].sr_msgid >= 0 ) {
1448                                         if ( META_IS_BINDING( &candidates[ i ] ) ) {
1449                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1450                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1451                                                         /* if still binding, destroy */
1452
1453 #ifdef DEBUG_205
1454                                                         char buf[ SLAP_TEXT_BUFLEN ];
1455
1456                                                         snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
1457                                                                 "ldap_unbind_ext[%ld] mc=%p ld=%p",
1458                                                                 op->o_log_prefix, i, (void *)mc,
1459                                                                 (void *)mc->mc_conns[i].msc_ld );
1460
1461                                                         Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
1462 #endif /* DEBUG_205 */
1463
1464                                                         meta_clear_one_candidate( op, mc, i );
1465                                                 }
1466                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1467                                                 META_BINDING_CLEAR( &candidates[ i ] );
1468
1469                                         } else {
1470                                                 (void)meta_back_cancel( mc, op, rs,
1471                                                         candidates[ i ].sr_msgid, i,
1472                                                         LDAP_BACK_DONTSEND );
1473                                         }
1474
1475                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1476                                         assert( ncandidates > 0 );
1477                                         --ncandidates;
1478                                 }
1479                         }
1480
1481                         if ( op->o_abandon ) {
1482                                 rc = SLAPD_ABANDON;
1483                         }
1484
1485                         /* let send_ldap_result play cleanup handlers (ITS#4645) */
1486                         break;
1487                 }
1488
1489                 /* if no entry was found during this loop,
1490                  * set a minimal timeout */
1491                 if ( ncandidates > 0 && gotit == 0 ) {
1492                         if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
1493                                 save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1494
1495                                 /* arbitrarily limit to something between 1 and 2 minutes */
1496                         } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
1497                                 || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
1498                         {
1499                                 /* double the timeout */
1500                                 lutil_timermul( &save_tv, 2, &save_tv );
1501                         }
1502
1503                         if ( alreadybound == 0 ) {
1504                                 tv = save_tv;
1505                                 (void)select( 0, NULL, NULL, NULL, &tv );
1506
1507                         } else {
1508                                 ldap_pvt_thread_yield();
1509                         }
1510                 }
1511         }
1512
1513         if ( rc == -1 ) {
1514                 /*
1515                  * FIXME: need a better strategy to handle errors
1516                  */
1517                 if ( mc ) {
1518                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1519                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1520                                 LDAP_BACK_SENDERR );
1521                 } else {
1522                         rc = rs->sr_err;
1523                 }
1524                 goto finish;
1525         }
1526
1527         /*
1528          * Rewrite the matched portion of the search base, if required
1529          *
1530          * FIXME: only the last one gets caught!
1531          */
1532         savepriv = op->o_private;
1533         op->o_private = (void *)(long)mi->mi_ntargets;
1534         if ( candidate_match > 0 ) {
1535                 struct berval   pmatched = BER_BVNULL;
1536
1537                 /* we use the first one */
1538                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1539                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1540                                         && candidates[ i ].sr_matched != NULL )
1541                         {
1542                                 struct berval   bv, pbv;
1543                                 int             rc;
1544
1545                                 /* if we got success, and this target
1546                                  * returned noSuchObject, and its suffix
1547                                  * is a superior of the searchBase,
1548                                  * ignore the matchedDN */
1549                                 if ( sres == LDAP_SUCCESS
1550                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1551                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1552                                 {
1553                                         free( (char *)candidates[ i ].sr_matched );
1554                                         candidates[ i ].sr_matched = NULL;
1555                                         continue;
1556                                 }
1557
1558                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1559                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1560
1561                                 if ( rc == LDAP_SUCCESS ) {
1562
1563                                         /* NOTE: if they all are superiors
1564                                          * of the baseDN, the shorter is also
1565                                          * superior of the longer... */
1566                                         if ( pbv.bv_len > pmatched.bv_len ) {
1567                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1568                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1569                                                 }
1570                                                 pmatched = pbv;
1571                                                 op->o_private = (void *)i;
1572
1573                                         } else {
1574                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1575                                         }
1576                                 }
1577
1578                                 if ( candidates[ i ].sr_matched != NULL ) {
1579                                         free( (char *)candidates[ i ].sr_matched );
1580                                         candidates[ i ].sr_matched = NULL;
1581                                 }
1582                         }
1583                 }
1584
1585                 if ( !BER_BVISNULL( &pmatched ) ) {
1586                         matched = pmatched.bv_val;
1587                 }
1588
1589         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1590                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1591         }
1592
1593         /*
1594          * In case we returned at least one entry, we return LDAP_SUCCESS
1595          * otherwise, the latter error code we got
1596          */
1597
1598         if ( sres == LDAP_SUCCESS ) {
1599                 if ( rs->sr_v2ref ) {
1600                         sres = LDAP_REFERRAL;
1601                 }
1602
1603                 if ( META_BACK_ONERR_REPORT( mi ) ) {
1604                         /*
1605                          * Report errors, if any
1606                          *
1607                          * FIXME: we should handle error codes and return the more
1608                          * important/reasonable
1609                          */
1610                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1611                                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1612                                         continue;
1613                                 }
1614
1615                                 if ( candidates[ i ].sr_err != LDAP_SUCCESS
1616                                         && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
1617                                 {
1618                                         sres = candidates[ i ].sr_err;
1619                                         break;
1620                                 }
1621                         }
1622                 }
1623         }
1624
1625         rs->sr_err = sres;
1626         rs->sr_matched = matched;
1627         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1628         send_ldap_result( op, rs );
1629         op->o_private = savepriv;
1630         rs->sr_matched = NULL;
1631         rs->sr_ref = NULL;
1632
1633 finish:;
1634         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1635                 op->o_tmpfree( matched, op->o_tmpmemctx );
1636         }
1637
1638         if ( rs->sr_v2ref ) {
1639                 ber_bvarray_free( rs->sr_v2ref );
1640         }
1641
1642         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1643                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1644                         continue;
1645                 }
1646
1647                 if ( mc && META_IS_BINDING( &candidates[ i ] ) ) {
1648                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1649                         if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ) {
1650                                 assert( candidates[ i ].sr_msgid >= 0 );
1651                                 assert( mc->mc_conns[ i ].msc_ld != NULL );
1652
1653 #ifdef DEBUG_205
1654                                 Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
1655                                         "ldap_unbind_ext[%ld] ld=%p\n",
1656                                         op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
1657 #endif /* DEBUG_205 */
1658
1659                                 /* if still binding, destroy */
1660                                 meta_clear_one_candidate( op, mc, i );
1661                         }
1662                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1663                         META_BINDING_CLEAR( &candidates[ i ] );
1664                 }
1665
1666                 if ( candidates[ i ].sr_matched ) {
1667                         free( (char *)candidates[ i ].sr_matched );
1668                         candidates[ i ].sr_matched = NULL;
1669                 }
1670
1671                 if ( candidates[ i ].sr_text ) {
1672                         ldap_memfree( (char *)candidates[ i ].sr_text );
1673                         candidates[ i ].sr_text = NULL;
1674                 }
1675
1676                 if ( candidates[ i ].sr_ref ) {
1677                         ber_bvarray_free( candidates[ i ].sr_ref );
1678                         candidates[ i ].sr_ref = NULL;
1679                 }
1680
1681                 if ( candidates[ i ].sr_ctrls ) {
1682                         ldap_controls_free( candidates[ i ].sr_ctrls );
1683                         candidates[ i ].sr_ctrls = NULL;
1684                 }
1685
1686                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1687                         meta_back_quarantine( op, &candidates[ i ], i );
1688                 }
1689
1690                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1691                  * one contacted target never responded, invalidate the connection
1692                  * NOTE: should we quarantine the target as well?  right now, the connection
1693                  * is invalidated; the next time it will be recreated and the target
1694                  * will be quarantined if it cannot be contacted */
1695                 if ( mi->mi_idle_timeout != 0
1696                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1697                         && op->o_time > mc->mc_conns[ i ].msc_time )
1698                 {
1699                         /* don't let anyone else use this expired connection */
1700                         LDAP_BACK_CONN_TAINTED_SET( mc );
1701                 }
1702         }
1703
1704         if ( mc ) {
1705                 meta_back_release_conn( mi, mc );
1706         }
1707
1708         return rs->sr_err;
1709 }
1710
1711 static int
1712 meta_send_entry(
1713         Operation       *op,
1714         SlapReply       *rs,
1715         metaconn_t      *mc,
1716         int             target,
1717         LDAPMessage     *e )
1718 {
1719         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1720         struct berval           a, mapped;
1721         Entry                   ent = { 0 };
1722         BerElement              ber = *e->lm_ber;
1723         Attribute               *attr, **attrp;
1724         struct berval           bdn,
1725                                 dn = BER_BVNULL;
1726         const char              *text;
1727         dncookie                dc;
1728         int                     rc;
1729
1730         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1731                 return LDAP_DECODING_ERROR;
1732         }
1733
1734         /*
1735          * Rewrite the dn of the result, if needed
1736          */
1737         dc.target = mi->mi_targets[ target ];
1738         dc.conn = op->o_conn;
1739         dc.rs = rs;
1740         dc.ctx = "searchResult";
1741
1742         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1743         if ( rs->sr_err != LDAP_SUCCESS) {
1744                 return rs->sr_err;
1745         }
1746
1747         /*
1748          * Note: this may fail if the target host(s) schema differs
1749          * from the one known to the meta, and a DN with unknown
1750          * attributes is returned.
1751          *
1752          * FIXME: should we log anything, or delegate to dnNormalize?
1753          */
1754         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1755                 op->o_tmpmemctx );
1756         if ( dn.bv_val != bdn.bv_val ) {
1757                 free( dn.bv_val );
1758         }
1759         BER_BVZERO( &dn );
1760
1761         if ( rc != LDAP_SUCCESS ) {
1762                 return LDAP_INVALID_DN_SYNTAX;
1763         }
1764
1765         /*
1766          * cache dn
1767          */
1768         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1769                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1770                                 &ent.e_nname, target );
1771         }
1772
1773         attrp = &ent.e_attrs;
1774
1775         dc.ctx = "searchAttrDN";
1776         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1777                 int                             last = 0;
1778                 slap_syntax_validate_func       *validate;
1779                 slap_syntax_transform_func      *pretty;
1780
1781                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1782                                 &a, &mapped, BACKLDAP_REMAP );
1783                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1784                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1785                         continue;
1786                 }
1787                 attr = attr_alloc( NULL );
1788                 if ( attr == NULL ) {
1789                         continue;
1790                 }
1791                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1792                                 != LDAP_SUCCESS) {
1793                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1794                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1795                         {
1796                                 char    buf[ SLAP_TEXT_BUFLEN ];
1797
1798                                 snprintf( buf, sizeof( buf ),
1799                                         "%s meta_send_entry(\"%s\"): "
1800                                         "slap_bv2undef_ad(%s): %s\n",
1801                                         op->o_log_prefix, ent.e_name.bv_val,
1802                                         mapped.bv_val, text );
1803
1804                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1805                                 attr_free( attr );
1806                                 continue;
1807                         }
1808                 }
1809
1810                 /* no subschemaSubentry */
1811                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1812                         || attr->a_desc == slap_schema.si_ad_entryDN )
1813                 {
1814
1815                         /*
1816                          * We eat target's subschemaSubentry because
1817                          * a search for this value is likely not
1818                          * to resolve to the appropriate backend;
1819                          * later, the local subschemaSubentry is
1820                          * added.
1821                          *
1822                          * We also eat entryDN because the frontend
1823                          * will reattach it without checking if already
1824                          * present...
1825                          */
1826                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1827
1828                         attr_free(attr);
1829                         continue;
1830                 }
1831
1832                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1833                                 || attr->a_vals == NULL )
1834                 {
1835                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1836
1837                 } else {
1838                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1839                                 ;
1840                 }
1841
1842                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1843                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1844
1845                 if ( !validate && !pretty ) {
1846                         attr_free( attr );
1847                         goto next_attr;
1848                 }
1849
1850                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1851                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1852                 {
1853                         struct berval   *bv;
1854
1855                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1856                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1857                                                 bv, &mapped, BACKLDAP_REMAP );
1858                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1859                                         free( bv->bv_val );
1860                                         BER_BVZERO( bv );
1861                                         if ( --last < 0 ) {
1862                                                 break;
1863                                         }
1864                                         *bv = attr->a_vals[ last ];
1865                                         BER_BVZERO( &attr->a_vals[ last ] );
1866                                         bv--;
1867
1868                                 } else if ( mapped.bv_val != bv->bv_val ) {
1869                                         free( bv->bv_val );
1870                                         ber_dupbv( bv, &mapped );
1871                                 }
1872                         }
1873                 /*
1874                  * It is necessary to try to rewrite attributes with
1875                  * dn syntax because they might be used in ACLs as
1876                  * members of groups; since ACLs are applied to the
1877                  * rewritten stuff, no dn-based subecj clause could
1878                  * be used at the ldap backend side (see
1879                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1880                  * The problem can be overcome by moving the dn-based
1881                  * ACLs to the target directory server, and letting
1882                  * everything pass thru the ldap backend.
1883                  */
1884                 } else {
1885                         int     i;
1886
1887                         if ( attr->a_desc->ad_type->sat_syntax ==
1888                                 slap_schema.si_syn_distinguishedName )
1889                         {
1890                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1891
1892                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1893                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1894
1895                         }
1896
1897                         for ( i = 0; i < last; i++ ) {
1898                                 struct berval   pval;
1899                                 int             rc;
1900
1901                                 if ( pretty ) {
1902                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1903                                                 &attr->a_vals[i], &pval, NULL );
1904
1905                                 } else {
1906                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1907                                                 &attr->a_vals[i] );
1908                                 }
1909
1910                                 if ( rc ) {
1911                                         LBER_FREE( attr->a_vals[i].bv_val );
1912                                         if ( --last == i ) {
1913                                                 BER_BVZERO( &attr->a_vals[ i ] );
1914                                                 break;
1915                                         }
1916                                         attr->a_vals[i] = attr->a_vals[last];
1917                                         BER_BVZERO( &attr->a_vals[last] );
1918                                         i--;
1919                                         continue;
1920                                 }
1921
1922                                 if ( pretty ) {
1923                                         LBER_FREE( attr->a_vals[i].bv_val );
1924                                         attr->a_vals[i] = pval;
1925                                 }
1926                         }
1927
1928                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
1929                                 attr_free( attr );
1930                                 goto next_attr;
1931                         }
1932                 }
1933
1934                 if ( last && attr->a_desc->ad_type->sat_equality &&
1935                         attr->a_desc->ad_type->sat_equality->smr_normalize )
1936                 {
1937                         int i;
1938
1939                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
1940                         for ( i = 0; i<last; i++ ) {
1941                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
1942                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
1943                                         attr->a_desc->ad_type->sat_syntax,
1944                                         attr->a_desc->ad_type->sat_equality,
1945                                         &attr->a_vals[i], &attr->a_nvals[i],
1946                                         NULL );
1947                         }
1948                         BER_BVZERO( &attr->a_nvals[i] );
1949
1950                 } else {
1951                         attr->a_nvals = attr->a_vals;
1952                 }
1953
1954                 *attrp = attr;
1955                 attrp = &attr->a_next;
1956 next_attr:;
1957         }
1958         rs->sr_entry = &ent;
1959         rs->sr_attrs = op->ors_attrs;
1960         rs->sr_flags = 0;
1961         rs->sr_err = LDAP_SUCCESS;
1962         rc = send_search_entry( op, rs );
1963         switch ( rc ) {
1964         case LDAP_UNAVAILABLE:
1965                 rc = LDAP_OTHER;
1966                 break;
1967         }
1968         rs->sr_entry = NULL;
1969         rs->sr_attrs = NULL;
1970
1971         if ( !BER_BVISNULL( &ent.e_name ) ) {
1972                 free( ent.e_name.bv_val );
1973                 BER_BVZERO( &ent.e_name );
1974         }
1975         if ( !BER_BVISNULL( &ent.e_nname ) ) {
1976                 free( ent.e_nname.bv_val );
1977                 BER_BVZERO( &ent.e_nname );
1978         }
1979         entry_clean( &ent );
1980
1981         return rc;
1982 }
1983