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 1999-2008 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 only the first time... */
 236         ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_ON );
 237
 238 retry:;
 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                         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 320                         break;
 321                 }
 322                 /* fall thru */
 323
 324         default:
 325 other:;
 326                 rs->sr_err = rc;
 327                 rc = slap_map_api2result( rs );
 328
 329                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 330                 meta_clear_one_candidate( op, mc, candidate );
 331                 candidates[ candidate ].sr_err = rc;
 332                 if ( META_BACK_ONERR_STOP( mi ) ) {
 333                         LDAP_BACK_CONN_TAINTED_SET( mc );
 334                         meta_back_release_conn_lock( mi, mc, 0 );
 335                         *mcp = NULL;
 336                         rs->sr_err = rc;
 337
 338                         retcode = META_SEARCH_ERR;
 339
 340                 } else {
 341                         retcode = META_SEARCH_NOT_CANDIDATE;
 342                 }
 343                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 344                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 345                 break;
 346         }
 347
 348         return retcode;
 349 }
 350
 351 static meta_search_candidate_t
 352 meta_search_dobind_result(
 353         Operation               *op,
 354         SlapReply               *rs,
 355         metaconn_t              **mcp,
 356         int                     candidate,
 357         SlapReply               *candidates,
 358         LDAPMessage             *res )
 359 {
 360         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 361         metaconn_t              *mc = *mcp;
 362         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 363
 364         meta_search_candidate_t retcode = META_SEARCH_NOT_CANDIDATE;
 365         int                     rc;
 366
 367         assert( msc->msc_ld != NULL );
 368
 369         /* FIXME: matched? referrals? response controls? */
 370         rc = ldap_parse_result( msc->msc_ld, res,
 371                 &candidates[ candidate ].sr_err,
 372                 NULL, NULL, NULL, NULL, 0 );
 373         if ( rc != LDAP_SUCCESS ) {
 374                 candidates[ candidate ].sr_err = rc;
 375
 376         } else {
 377                 rc = slap_map_api2result( &candidates[ candidate ] );
 378         }
 379
 380         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 381         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 382         if ( rc != LDAP_SUCCESS ) {
 383                 meta_clear_one_candidate( op, mc, candidate );
 384                 candidates[ candidate ].sr_err = rc;
 385                 if ( META_BACK_ONERR_STOP( mi ) ) {
 386                         LDAP_BACK_CONN_TAINTED_SET( mc );
 387                         meta_back_release_conn_lock( mi, mc, 0 );
 388                         *mcp = NULL;
 389                         retcode = META_SEARCH_ERR;
 390                         rs->sr_err = rc;
 391                 }
 392
 393         } else {
 394                 /* FIXME: check if bound as idassert authcDN! */
 395                 if ( BER_BVISNULL( &msc->msc_bound_ndn )
 396                         || BER_BVISEMPTY( &msc->msc_bound_ndn ) )
 397                 {
 398                         LDAP_BACK_CONN_ISANON_SET( msc );
 399
 400                 } else {
 401                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 402                 }
 403                 retcode = META_SEARCH_CANDIDATE;
 404
 405                 /* connect must be async */
 406                 ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_OFF );
 407         }
 408
 409         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 410         META_BINDING_CLEAR( &candidates[ candidate ] );
 411
 412         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 413
 414         return retcode;
 415 }
 416
 417 static meta_search_candidate_t
 418 meta_back_search_start(
 419         Operation               *op,
 420         SlapReply               *rs,
 421         dncookie                *dc,
 422         metaconn_t              **mcp,
 423         int                     candidate,
 424         SlapReply               *candidates )
 425 {
 426         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 427         metatarget_t            *mt = mi->mi_targets[ candidate ];
 428         metasingleconn_t        *msc = &(*mcp)->mc_conns[ candidate ];
 429         struct berval           realbase = op->o_req_dn;
 430         int                     realscope = op->ors_scope;
 431         struct berval           mbase = BER_BVNULL;
 432         struct berval           mfilter = BER_BVNULL;
 433         char                    **mapped_attrs = NULL;
 434         int                     rc;
 435         meta_search_candidate_t retcode;
 436         struct timeval          tv, *tvp = NULL;
 437         int                     nretries = 1;
 438         LDAPControl             **ctrls = NULL;
 439
 440         /* this should not happen; just in case... */
 441         if ( msc->msc_ld == NULL ) {
 442                 Debug( LDAP_DEBUG_ANY,
 443                         "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
 444                         op->o_log_prefix, candidate,
 445                         META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
 446                 candidates[ candidate ].sr_err = LDAP_OTHER;
 447                 if ( META_BACK_ONERR_STOP( mi ) ) {
 448                         return META_SEARCH_ERR;
 449                 }
 450                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 451                 return META_SEARCH_NOT_CANDIDATE;
 452         }
 453
 454         Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );
 455
 456         /*
 457          * modifies the base according to the scope, if required
 458          */
 459         if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
 460                 switch ( op->ors_scope ) {
 461                 case LDAP_SCOPE_SUBTREE:
 462                         /*
 463                          * make the target suffix the new base
 464                          * FIXME: this is very forgiving, because
 465                          * "illegal" searchBases may be turned
 466                          * into the suffix of the target; however,
 467                          * the requested searchBase already passed
 468                          * thru the candidate analyzer...
 469                          */
 470                         if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
 471                                 realbase = mt->mt_nsuffix;
 472                                 if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 473                                         realscope = LDAP_SCOPE_SUBORDINATE;
 474                                 }
 475
 476                         } else {
 477                                 /*
 478                                  * this target is no longer candidate
 479                                  */
 480                                 retcode = META_SEARCH_NOT_CANDIDATE;
 481                                 goto doreturn;
 482                         }
 483                         break;
 484
 485                 case LDAP_SCOPE_SUBORDINATE:
 486                 case LDAP_SCOPE_ONELEVEL:
 487                 {
 488                         struct berval   rdn = mt->mt_nsuffix;
 489                         rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
 490                         if ( dnIsOneLevelRDN( &rdn )
 491                                         && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
 492                         {
 493                                 /*
 494                                  * if there is exactly one level,
 495                                  * make the target suffix the new
 496                                  * base, and make scope "base"
 497                                  */
 498                                 realbase = mt->mt_nsuffix;
 499                                 if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
 500                                         if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
 501                                                 realscope = LDAP_SCOPE_SUBORDINATE;
 502                                         } else {
 503                                                 realscope = LDAP_SCOPE_SUBTREE;
 504                                         }
 505                                 } else {
 506                                         realscope = LDAP_SCOPE_BASE;
 507                                 }
 508                                 break;
 509                         } /* else continue with the next case */
 510                 }
 511
 512                 case LDAP_SCOPE_BASE:
 513                         /*
 514                          * this target is no longer candidate
 515                          */
 516                         retcode = META_SEARCH_NOT_CANDIDATE;
 517                         goto doreturn;
 518                 }
 519         }
 520
 521         /* initiate dobind */
 522         retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );
 523
 524         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 525
 526         if ( retcode != META_SEARCH_CANDIDATE ) {
 527                 goto doreturn;
 528         }
 529
 530         /*
 531          * Rewrite the search base, if required
 532          */
 533         dc->target = mt;
 534         dc->ctx = "searchBase";
 535         switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
 536         case LDAP_SUCCESS:
 537                 break;
 538
 539         case LDAP_UNWILLING_TO_PERFORM:
 540                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 541                 rs->sr_text = "Operation not allowed";
 542                 send_ldap_result( op, rs );
 543                 retcode = META_SEARCH_ERR;
 544                 goto doreturn;
 545
 546         default:
 547
 548                 /*
 549                  * this target is no longer candidate
 550                  */
 551                 retcode = META_SEARCH_NOT_CANDIDATE;
 552                 goto doreturn;
 553         }
 554
 555         /*
 556          * Maps filter
 557          */
 558         rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
 559                         &mfilter, BACKLDAP_MAP );
 560         switch ( rc ) {
 561         case LDAP_SUCCESS:
 562                 break;
 563
 564         case LDAP_COMPARE_FALSE:
 565         default:
 566                 /*
 567                  * this target is no longer candidate
 568                  */
 569                 retcode = META_SEARCH_NOT_CANDIDATE;
 570                 goto done;
 571         }
 572
 573         /*
 574          * Maps required attributes
 575          */
 576         rc = ldap_back_map_attrs( &mt->mt_rwmap.rwm_at,
 577                         op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
 578         if ( rc != LDAP_SUCCESS ) {
 579                 /*
 580                  * this target is no longer candidate
 581                  */
 582                 retcode = META_SEARCH_NOT_CANDIDATE;
 583                 goto done;
 584         }
 585
 586         /* should we check return values? */
 587         if ( op->ors_deref != -1 ) {
 588                 assert( msc->msc_ld != NULL );
 589                 (void)ldap_set_option( msc->msc_ld, LDAP_OPT_DEREF,
 590                                 ( void * )&op->ors_deref );
 591         }
 592
 593         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 594                 tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
 595                 tv.tv_usec = 0;
 596                 tvp = &tv;
 597         }
 598
 599 retry:;
 600         ctrls = op->o_ctrls;
 601         if ( meta_back_controls_add( op, rs, *mcp, candidate, &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)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 628                         goto retry;
 629                 }
 630
 631                 if ( *mcp == NULL ) {
 632                         retcode = META_SEARCH_ERR;
 633                         candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 634                         break;
 635                 }
 636                 /* fall thru */
 637
 638         default:
 639                 candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
 640                 retcode = META_SEARCH_NOT_CANDIDATE;
 641         }
 642
 643 done:;
 644         (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 645
 646         if ( mapped_attrs ) {
 647                 free( mapped_attrs );
 648         }
 649         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 650                 free( mfilter.bv_val );
 651         }
 652         if ( mbase.bv_val != realbase.bv_val ) {
 653                 free( mbase.bv_val );
 654         }
 655
 656 doreturn:;
 657         Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );
 658
 659         return retcode;
 660 }
 661
 662 int
 663 meta_back_search( Operation *op, SlapReply *rs )
 664 {
 665         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 666         metaconn_t      *mc;
 667         struct timeval  save_tv = { 0, 0 },
 668                         tv;
 669         time_t          stoptime = (time_t)(-1),
 670                         lastres_time = slap_get_time(),
 671                         timeout = 0;
 672         int             rc = 0, sres = LDAP_SUCCESS;
 673         char            *matched = NULL;
 674         int             last = 0, ncandidates = 0,
 675                         initial_candidates = 0, candidate_match = 0,
 676                         needbind = 0;
 677         ldap_back_send_t        sendok = LDAP_BACK_SENDERR;
 678         long            i;
 679         dncookie        dc;
 680         int             is_ok = 0;
 681         void            *savepriv;
 682         SlapReply       *candidates = NULL;
 683
 684         /*
 685          * controls are set in ldap_back_dobind()
 686          *
 687          * FIXME: in case of values return filter, we might want
 688          * to map attrs and maybe rewrite value
 689          */
 690 getconn:;
 691         mc = meta_back_getconn( op, rs, NULL, sendok );
 692         if ( !mc ) {
 693                 return rs->sr_err;
 694         }
 695
 696         dc.conn = op->o_conn;
 697         dc.rs = rs;
 698
 699         if ( candidates == NULL ) candidates = meta_back_candidates_get( op );
 700         /*
 701          * Inits searches
 702          */
 703         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 704                 /* reset sr_msgid; it is used in most loops
 705                  * to check if that target is still to be considered */
 706                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 707
 708                 /* a target is marked as candidate by meta_back_getconn();
 709                  * if for any reason (an error, it's over or so) it is
 710                  * no longer active, sr_msgid is set to META_MSGID_IGNORE
 711                  * but it remains candidate, which means it has been active
 712                  * at some point during the operation.  This allows to
 713                  * use its response code and more to compute the final
 714                  * response */
 715                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 716                         continue;
 717                 }
 718
 719                 candidates[ i ].sr_matched = NULL;
 720                 candidates[ i ].sr_text = NULL;
 721                 candidates[ i ].sr_ref = NULL;
 722                 candidates[ i ].sr_ctrls = NULL;
 723
 724                 /* get largest timeout among candidates */
 725                 if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
 726                         && mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
 727                 {
 728                         timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
 729                 }
 730         }
 731
 732         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 733                 if ( !META_IS_CANDIDATE( &candidates[ i ] )
 734                         || candidates[ i ].sr_err != LDAP_SUCCESS )
 735                 {
 736                         continue;
 737                 }
 738
 739                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 740                 {
 741                 case META_SEARCH_NOT_CANDIDATE:
 742                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 743                         break;
 744
 745                 case META_SEARCH_NEED_BIND:
 746                         ++needbind;
 747                         /* fallthru */
 748
 749                 case META_SEARCH_CONNECTING:
 750                 case META_SEARCH_CANDIDATE:
 751                 case META_SEARCH_BINDING:
 752                         candidates[ i ].sr_type = REP_INTERMEDIATE;
 753                         ++ncandidates;
 754                         break;
 755
 756                 case META_SEARCH_ERR:
 757                         savepriv = op->o_private;
 758                         op->o_private = (void *)i;
 759                         send_ldap_result( op, rs );
 760                         op->o_private = savepriv;
 761                         rc = -1;
 762                         goto finish;
 763
 764                 default:
 765                         assert( 0 );
 766                         break;
 767                 }
 768         }
 769
 770         if ( ncandidates > 0 && needbind == ncandidates ) {
 771                 /*
 772                  * give up the second time...
 773                  *
 774                  * NOTE: this should not occur the second time, since a fresh
 775                  * connection has ben created; however, targets may also
 776                  * need bind because the bind timed out or so.
 777                  */
 778                 if ( sendok & LDAP_BACK_BINDING ) {
 779                         Debug( LDAP_DEBUG_ANY,
 780                                 "%s meta_back_search: unable to initialize conn\n",
 781                                 op->o_log_prefix, 0, 0 );
 782                         rs->sr_err = LDAP_UNAVAILABLE;
 783                         rs->sr_text = "unable to initialize connection to remote targets";
 784                         send_ldap_result( op, rs );
 785                         rc = -1;
 786                         goto finish;
 787                 }
 788
 789                 /* FIXME: better create a separate connection? */
 790                 sendok |= LDAP_BACK_BINDING;
 791
 792 #ifdef DEBUG_205
 793                 Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
 794                         op->o_log_prefix, (void *)mc, 0 );
 795 #endif /* DEBUG_205 */
 796
 797                 meta_back_release_conn( mi, mc );
 798                 mc = NULL;
 799
 800                 needbind = 0;
 801                 ncandidates = 0;
 802
 803                 goto getconn;
 804         }
 805
 806         initial_candidates = ncandidates;
 807
 808         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 809                 char    cnd[ SLAP_TEXT_BUFLEN ];
 810                 int     c;
 811
 812                 for ( c = 0; c < mi->mi_ntargets; c++ ) {
 813                         if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
 814                                 cnd[ c ] = '*';
 815                         } else {
 816                                 cnd[ c ] = ' ';
 817                         }
 818                 }
 819                 cnd[ c ] = '\0';
 820
 821                 Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
 822                         "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
 823         }
 824
 825         if ( initial_candidates == 0 ) {
 826                 /* NOTE: here we are not sending any matchedDN;
 827                  * this is intended, because if the back-meta
 828                  * is serving this search request, but no valid
 829                  * candidate could be looked up, it means that
 830                  * there is a hole in the mapping of the targets
 831                  * and thus no knowledge of any remote superior
 832                  * is available */
 833                 Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
 834                         "base=\"%s\" scope=%d: "
 835                         "no candidate could be selected\n",
 836                         op->o_log_prefix, op->o_req_dn.bv_val,
 837                         op->ors_scope );
 838
 839                 /* FIXME: we're sending the first error we encounter;
 840                  * maybe we should pick the worst... */
 841                 rc = LDAP_NO_SUCH_OBJECT;
 842                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 843                         if ( META_IS_CANDIDATE( &candidates[ i ] )
 844                                 && candidates[ i ].sr_err != LDAP_SUCCESS )
 845                         {
 846                                 rc = candidates[ i ].sr_err;
 847                                 break;
 848                         }
 849                 }
 850
 851                 send_ldap_error( op, rs, rc, NULL );
 852
 853                 goto finish;
 854         }
 855
 856         /* We pull apart the ber result, stuff it into a slapd entry, and
 857          * let send_search_entry stuff it back into ber format. Slow & ugly,
 858          * but this is necessary for version matching, and for ACL processing.
 859          */
 860
 861         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 862                 stoptime = op->o_time + op->ors_tlimit;
 863         }
 864
 865         /*
 866          * In case there are no candidates, no cycle takes place...
 867          *
 868          * FIXME: we might use a queue, to better balance the load
 869          * among the candidates
 870          */
 871         for ( rc = 0; ncandidates > 0; ) {
 872                 int     gotit = 0,
 873                         doabandon = 0,
 874                         alreadybound = ncandidates;
 875
 876                 /* check timeout */
 877                 if ( timeout && lastres_time > 0
 878                         && ( slap_get_time() - lastres_time ) > timeout )
 879                 {
 880                         doabandon = 1;
 881                         rs->sr_text = "Operation timed out";
 882                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 883                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 884                         savepriv = op->o_private;
 885                         op->o_private = (void *)i;
 886                         send_ldap_result( op, rs );
 887                         op->o_private = savepriv;
 888                         goto finish;
 889                 }
 890
 891                 /* check time limit */
 892                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 893                                 && slap_get_time() > stoptime )
 894                 {
 895                         doabandon = 1;
 896                         rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 897                         savepriv = op->o_private;
 898                         op->o_private = (void *)i;
 899                         send_ldap_result( op, rs );
 900                         op->o_private = savepriv;
 901                         goto finish;
 902                 }
 903
 904                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 905                         meta_search_candidate_t retcode = META_SEARCH_UNDEFINED;
 906                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 907                         LDAPMessage             *res = NULL, *msg;
 908
 909                         /* if msgid is invalid, don't ldap_result() */
 910                         if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
 911                                 continue;
 912                         }
 913
 914                         /* if target still needs bind, retry */
 915                         if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND
 916                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
 917                         {
 918                                 /* initiate dobind */
 919                                 retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );
 920
 921                                 Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
 922                                         op->o_log_prefix, i, retcode );
 923
 924                                 switch ( retcode ) {
 925                                 case META_SEARCH_NEED_BIND:
 926                                         alreadybound--;
 927                                         /* fallthru */
 928
 929                                 case META_SEARCH_CONNECTING:
 930                                 case META_SEARCH_BINDING:
 931                                         break;
 932
 933                                 case META_SEARCH_ERR:
 934                                         candidates[ i ].sr_err = rs->sr_err;
 935                                         if ( META_BACK_ONERR_STOP( mi ) ) {
 936                                                 savepriv = op->o_private;
 937                                                 op->o_private = (void *)i;
 938                                                 send_ldap_result( op, rs );
 939                                                 op->o_private = savepriv;
 940                                                 goto finish;
 941                                         }
 942                                         /* fallthru */
 943
 944                                 case META_SEARCH_NOT_CANDIDATE:
 945                                         /*
 946                                          * When no candidates are left,
 947                                          * the outer cycle finishes
 948                                          */
 949                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 950                                         assert( ncandidates > 0 );
 951                                         --ncandidates;
 952                                         break;
 953
 954                                 case META_SEARCH_CANDIDATE:
 955                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 956                                         switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
 957                                         {
 958                                         case META_SEARCH_CANDIDATE:
 959                                                 assert( candidates[ i ].sr_msgid >= 0 );
 960                                                 break;
 961
 962                                         case META_SEARCH_ERR:
 963                                                 candidates[ i ].sr_err = rs->sr_err;
 964                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
 965                                                         savepriv = op->o_private;
 966                                                         op->o_private = (void *)i;
 967                                                         send_ldap_result( op, rs );
 968                                                         op->o_private = savepriv;
 969                                                         goto finish;
 970                                                 }
 971                                                 /* fallthru */
 972
 973                                         case META_SEARCH_NOT_CANDIDATE:
 974                                                 /* means that meta_back_search_start()
 975                                                  * failed but onerr == continue */
 976                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
 977                                                 assert( ncandidates > 0 );
 978                                                 --ncandidates;
 979                                                 break;
 980
 981                                         default:
 982                                                 /* impossible */
 983                                                 assert( 0 );
 984                                                 break;
 985                                         }
 986                                         break;
 987
 988                                 default:
 989                                         /* impossible */
 990                                         assert( 0 );
 991                                         break;
 992                                 }
 993                                 continue;
 994                         }
 995
 996                         /* check for abandon */
 997                         if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
 998                                 break;
 999                         }
1000
1001 #ifdef DEBUG_205
1002                         if ( msc->msc_ld == NULL ) {
1003                                 char    buf[ SLAP_TEXT_BUFLEN ];
1004
1005                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1006                                 snprintf( buf, sizeof( buf ),
1007                                         "%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
1008                                         op->o_log_prefix, (long)i, (void *)mc,
1009                                         candidates[ i ].sr_msgid,
1010                                         META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
1011                                         LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
1012                                         META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
1013                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1014
1015                                 Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
1016                         }
1017 #endif /* DEBUG_205 */
1018
1019                         /*
1020                          * FIXME: handle time limit as well?
1021                          * Note that target servers are likely
1022                          * to handle it, so at some time we'll
1023                          * get a LDAP_TIMELIMIT_EXCEEDED from
1024                          * one of them ...
1025                          */
1026                         tv = save_tv;
1027                         rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
1028                                         LDAP_MSG_RECEIVED, &tv, &res );
1029                         switch ( rc ) {
1030                         case 0:
1031                                 /* FIXME: res should not need to be freed */
1032                                 assert( res == NULL );
1033                                 continue;
1034
1035                         case -1:
1036 really_bad:;
1037                                 /* something REALLY bad happened! */
1038                                 if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1039                                         candidates[ i ].sr_type = REP_RESULT;
1040
1041                                         if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
1042                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1043                                                 switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates ) )
1044                                                 {
1045                                                         /* means that failed but onerr == continue */
1046                                                 case META_SEARCH_NOT_CANDIDATE:
1047                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1048
1049                                                         assert( ncandidates > 0 );
1050                                                         --ncandidates;
1051
1052                                                         candidates[ i ].sr_err = rs->sr_err;
1053                                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1054                                                                 savepriv = op->o_private;
1055                                                                 op->o_private = (void *)i;
1056                                                                 send_ldap_result( op, rs );
1057                                                                 op->o_private = savepriv;
1058                                                                 goto finish;
1059                                                         }
1060                                                         /* fall thru */
1061
1062                                                 case META_SEARCH_CANDIDATE:
1063                                                         /* get back into business... */
1064                                                         continue;
1065
1066                                                 case META_SEARCH_BINDING:
1067                                                 case META_SEARCH_CONNECTING:
1068                                                 case META_SEARCH_NEED_BIND:
1069                                                 case META_SEARCH_UNDEFINED:
1070                                                         assert( 0 );
1071
1072                                                 default:
1073                                                         /* unrecoverable error */
1074                                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1075                                                         rc = rs->sr_err = LDAP_OTHER;
1076                                                         goto finish;
1077                                                 }
1078                                         }
1079
1080                                         candidates[ i ].sr_err = rs->sr_err;
1081                                         if ( META_BACK_ONERR_STOP( mi ) ) {
1082                                                 savepriv = op->o_private;
1083                                                 op->o_private = (void *)i;
1084                                                 send_ldap_result( op, rs );
1085                                                 op->o_private = savepriv;
1086                                                 goto finish;
1087                                         }
1088                                 }
1089
1090                                 /*
1091                                  * When no candidates are left,
1092                                  * the outer cycle finishes
1093                                  */
1094                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1095                                 assert( ncandidates > 0 );
1096                                 --ncandidates;
1097                                 rs->sr_err = candidates[ i ].sr_err;
1098                                 continue;
1099
1100                         default:
1101                                 lastres_time = slap_get_time();
1102
1103                                 /* only touch when activity actually took place... */
1104                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < lastres_time ) {
1105                                         msc->msc_time = lastres_time;
1106                                 }
1107                                 break;
1108                         }
1109
1110                         for ( msg = ldap_first_message( msc->msc_ld, res );
1111                                 msg != NULL;
1112                                 msg = ldap_next_message( msc->msc_ld, msg ) )
1113                         {
1114                                 rc = ldap_msgtype( msg );
1115                                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
1116                                         LDAPMessage     *e;
1117
1118                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1119                                                 /* don't retry any more... */
1120                                                 candidates[ i ].sr_type = REP_RESULT;
1121                                         }
1122
1123                                         is_ok++;
1124
1125                                         e = ldap_first_entry( msc->msc_ld, msg );
1126                                         savepriv = op->o_private;
1127                                         op->o_private = (void *)i;
1128                                         rs->sr_err = meta_send_entry( op, rs, mc, i, e );
1129
1130                                         switch ( rs->sr_err ) {
1131                                         case LDAP_SIZELIMIT_EXCEEDED:
1132                                                 savepriv = op->o_private;
1133                                                 op->o_private = (void *)i;
1134                                                 send_ldap_result( op, rs );
1135                                                 op->o_private = savepriv;
1136                                                 rs->sr_err = LDAP_SUCCESS;
1137                                                 ldap_msgfree( res );
1138                                                 res = NULL;
1139                                                 goto finish;
1140
1141                                         case LDAP_UNAVAILABLE:
1142                                                 rs->sr_err = LDAP_OTHER;
1143                                                 ldap_msgfree( res );
1144                                                 res = NULL;
1145                                                 goto finish;
1146                                         }
1147                                         op->o_private = savepriv;
1148
1149                                         /* don't wait any longer... */
1150                                         gotit = 1;
1151                                         save_tv.tv_sec = 0;
1152                                         save_tv.tv_usec = 0;
1153
1154                                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
1155                                         char            **references = NULL;
1156                                         int             cnt;
1157
1158                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1159                                                 /* don't retry any more... */
1160                                                 candidates[ i ].sr_type = REP_RESULT;
1161                                         }
1162
1163                                         is_ok++;
1164
1165                                         rc = ldap_parse_reference( msc->msc_ld, msg,
1166                                                         &references, &rs->sr_ctrls, 0 );
1167
1168                                         if ( rc != LDAP_SUCCESS ) {
1169                                                 continue;
1170                                         }
1171
1172                                         if ( references == NULL ) {
1173                                                 continue;
1174                                         }
1175
1176 #ifdef ENABLE_REWRITE
1177                                         dc.ctx = "referralDN";
1178 #else /* ! ENABLE_REWRITE */
1179                                         dc.tofrom = 0;
1180                                         dc.normalized = 0;
1181 #endif /* ! ENABLE_REWRITE */
1182
1183                                         /* FIXME: merge all and return at the end */
1184
1185                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1186                                                 ;
1187
1188                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1189
1190                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1191                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
1192                                         }
1193                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
1194
1195                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
1196
1197                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
1198                                                 /* ignore return value by now */
1199                                                 savepriv = op->o_private;
1200                                                 op->o_private = (void *)i;
1201                                                 ( void )send_search_reference( op, rs );
1202                                                 op->o_private = savepriv;
1203
1204                                                 ber_bvarray_free( rs->sr_ref );
1205                                                 rs->sr_ref = NULL;
1206                                         }
1207
1208                                         /* cleanup */
1209                                         if ( references ) {
1210                                                 ber_memvfree( (void **)references );
1211                                         }
1212
1213                                         if ( rs->sr_ctrls ) {
1214                                                 ldap_controls_free( rs->sr_ctrls );
1215                                                 rs->sr_ctrls = NULL;
1216                                         }
1217
1218                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
1219                                         char            buf[ SLAP_TEXT_BUFLEN ];
1220                                         char            **references = NULL;
1221
1222                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1223                                                 /* don't retry any more... */
1224                                                 candidates[ i ].sr_type = REP_RESULT;
1225                                         }
1226
1227                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1228
1229                                         /* NOTE: ignores response controls
1230                                          * (and intermediate response controls
1231                                          * as well, except for those with search
1232                                          * references); this may not be correct,
1233                                          * but if they're not ignored then
1234                                          * back-meta would need to merge them
1235                                          * consistently (think of pagedResults...)
1236                                          */
1237                                         /* FIXME: response controls? */
1238                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
1239                                                 msg,
1240                                                 &candidates[ i ].sr_err,
1241                                                 (char **)&candidates[ i ].sr_matched,
1242                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
1243                                                 &references,
1244                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
1245                                                 0 );
1246                                         if ( rs->sr_err != LDAP_SUCCESS ) {
1247                                                 sres = slap_map_api2result( &candidates[ i ] );
1248                                                 candidates[ i ].sr_type = REP_RESULT;
1249                                                 ldap_msgfree( res );
1250                                                 res = NULL;
1251                                                 goto really_bad;
1252                                         }
1253
1254                                         rs->sr_err = candidates[ i ].sr_err;
1255
1256                                         /* massage matchedDN if need be */
1257                                         if ( candidates[ i ].sr_matched != NULL ) {
1258                                                 struct berval   match, mmatch;
1259
1260                                                 ber_str2bv( candidates[ i ].sr_matched,
1261                                                         0, 0, &match );
1262                                                 candidates[ i ].sr_matched = NULL;
1263
1264                                                 dc.ctx = "matchedDN";
1265                                                 dc.target = mi->mi_targets[ i ];
1266                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1267                                                         if ( mmatch.bv_val == match.bv_val ) {
1268                                                                 candidates[ i ].sr_matched
1269                                                                         = ch_strdup( mmatch.bv_val );
1270
1271                                                         } else {
1272                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1273                                                         }
1274
1275                                                         candidate_match++;
1276                                                 }
1277                                                 ldap_memfree( match.bv_val );
1278                                         }
1279
1280                                         /* add references to array */
1281                                         /* RFC 4511: referrals can only appear
1282                                          * if result code is LDAP_REFERRAL */
1283                                         if ( references != NULL
1284                                                 && references[ 0 ] != NULL
1285                                                 && references[ 0 ][ 0 ] != '\0' )
1286                                         {
1287                                                 if ( rs->sr_err != LDAP_REFERRAL ) {
1288                                                         Debug( LDAP_DEBUG_ANY,
1289                                                                 "%s meta_back_search[%ld]: "
1290                                                                 "got referrals with err=%d\n",
1291                                                                 op->o_log_prefix,
1292                                                                 i, rs->sr_err );
1293
1294                                                 } else {
1295                                                         BerVarray       sr_ref;
1296                                                         int             cnt;
1297
1298                                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1299                                                                 ;
1300
1301                                                         sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1302
1303                                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1304                                                                 ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1305                                                         }
1306                                                         BER_BVZERO( &sr_ref[ cnt ] );
1307
1308                                                         ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1309
1310                                                         if ( rs->sr_v2ref == NULL ) {
1311                                                                 rs->sr_v2ref = sr_ref;
1312
1313                                                         } else {
1314                                                                 for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1315                                                                         ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1316                                                                 }
1317                                                                 ber_memfree( sr_ref );
1318                                                         }
1319                                                 }
1320
1321                                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
1322                                                 Debug( LDAP_DEBUG_ANY,
1323                                                         "%s meta_back_search[%ld]: "
1324                                                         "got err=%d with null "
1325                                                         "or empty referrals\n",
1326                                                         op->o_log_prefix,
1327                                                         i, rs->sr_err );
1328
1329                                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1330                                         }
1331
1332                                         /* cleanup */
1333                                         ber_memvfree( (void **)references );
1334
1335                                         sres = slap_map_api2result( rs );
1336
1337                                         if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1338                                                 snprintf( buf, sizeof( buf ),
1339                                                         "%s meta_back_search[%ld] "
1340                                                         "match=\"%s\" err=%ld",
1341                                                         op->o_log_prefix, i,
1342                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1343                                                         (long) candidates[ i ].sr_err );
1344                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1345                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1346
1347                                                 } else {
1348                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1349                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1350                                                 }
1351                                         }
1352
1353                                         switch ( sres ) {
1354                                         case LDAP_NO_SUCH_OBJECT:
1355                                                 /* is_ok is touched any time a valid
1356                                                  * (even intermediate) result is
1357                                                  * returned; as a consequence, if
1358                                                  * a candidate returns noSuchObject
1359                                                  * it is ignored and the candidate
1360                                                  * is simply demoted. */
1361                                                 if ( is_ok ) {
1362                                                         sres = LDAP_SUCCESS;
1363                                                 }
1364                                                 break;
1365
1366                                         case LDAP_SUCCESS:
1367                                         case LDAP_REFERRAL:
1368                                                 is_ok++;
1369                                                 break;
1370
1371                                         case LDAP_SIZELIMIT_EXCEEDED:
1372                                                 /* if a target returned sizelimitExceeded
1373                                                  * and the entry count is equal to the
1374                                                  * proxy's limit, the target would have
1375                                                  * returned more, and the error must be
1376                                                  * propagated to the client; otherwise,
1377                                                  * the target enforced a limit lower
1378                                                  * than what requested by the proxy;
1379                                                  * ignore it */
1380                                                 candidates[ i ].sr_err = rs->sr_err;
1381                                                 if ( rs->sr_nentries == op->ors_slimit
1382                                                         || META_BACK_ONERR_STOP( mi ) )
1383                                                 {
1384                                                         savepriv = op->o_private;
1385                                                         op->o_private = (void *)i;
1386                                                         send_ldap_result( op, rs );
1387                                                         op->o_private = savepriv;
1388                                                         ldap_msgfree( res );
1389                                                         res = NULL;
1390                                                         goto finish;
1391                                                 }
1392                                                 break;
1393
1394                                         default:
1395                                                 candidates[ i ].sr_err = rs->sr_err;
1396                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1397                                                         savepriv = op->o_private;
1398                                                         op->o_private = (void *)i;
1399                                                         send_ldap_result( op, rs );
1400                                                         op->o_private = savepriv;
1401                                                         ldap_msgfree( res );
1402                                                         res = NULL;
1403                                                         goto finish;
1404                                                 }
1405                                                 break;
1406                                         }
1407
1408                                         last = i;
1409                                         rc = 0;
1410
1411                                         /*
1412                                          * When no candidates are left,
1413                                          * the outer cycle finishes
1414                                          */
1415                                         assert( ncandidates > 0 );
1416                                         --ncandidates;
1417
1418                                 } else if ( rc == LDAP_RES_BIND ) {
1419                                         meta_search_candidate_t retcode;
1420
1421                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1422                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1423                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1424                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1425                                         }
1426
1427                                         switch ( retcode ) {
1428                                         case META_SEARCH_CANDIDATE:
1429                                                 break;
1430
1431                                                 /* means that failed but onerr == continue */
1432                                         case META_SEARCH_NOT_CANDIDATE:
1433                                         case META_SEARCH_ERR:
1434                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1435                                                 assert( ncandidates > 0 );
1436                                                 --ncandidates;
1437
1438                                                 candidates[ i ].sr_err = rs->sr_err;
1439                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1440                                                         savepriv = op->o_private;
1441                                                         op->o_private = (void *)i;
1442                                                         send_ldap_result( op, rs );
1443                                                         op->o_private = savepriv;
1444                                                         ldap_msgfree( res );
1445                                                         res = NULL;
1446                                                         goto finish;
1447                                                 }
1448                                                 goto free_message;
1449
1450                                         default:
1451                                                 assert( 0 );
1452                                                 break;
1453                                         }
1454
1455                                 } else {
1456                                         assert( 0 );
1457                                         ldap_msgfree( res );
1458                                         res = NULL;
1459                                         goto really_bad;
1460                                 }
1461                         }
1462
1463 free_message:;
1464                         ldap_msgfree( res );
1465                         res = NULL;
1466                 }
1467
1468                 /* check for abandon */
1469                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
1470                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1471                                 if ( candidates[ i ].sr_msgid >= 0
1472                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1473                                 {
1474                                         if ( META_IS_BINDING( &candidates[ i ] )
1475                                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1476                                         {
1477                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1478                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
1479                                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1480                                                 {
1481                                                         /* if still binding, destroy */
1482
1483 #ifdef DEBUG_205
1484                                                         char buf[ SLAP_TEXT_BUFLEN ];
1485
1486                                                         snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
1487                                                                 "ldap_unbind_ext[%ld] mc=%p ld=%p",
1488                                                                 op->o_log_prefix, i, (void *)mc,
1489                                                                 (void *)mc->mc_conns[i].msc_ld );
1490
1491                                                         Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
1492 #endif /* DEBUG_205 */
1493
1494                                                         meta_clear_one_candidate( op, mc, i );
1495                                                 }
1496                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1497                                                 META_BINDING_CLEAR( &candidates[ i ] );
1498
1499                                         } else {
1500                                                 (void)meta_back_cancel( mc, op, rs,
1501                                                         candidates[ i ].sr_msgid, i,
1502                                                         LDAP_BACK_DONTSEND );
1503                                         }
1504
1505                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1506                                         assert( ncandidates > 0 );
1507                                         --ncandidates;
1508                                 }
1509                         }
1510
1511                         if ( op->o_abandon ) {
1512                                 rc = SLAPD_ABANDON;
1513                         }
1514
1515                         /* let send_ldap_result play cleanup handlers (ITS#4645) */
1516                         break;
1517                 }
1518
1519                 /* if no entry was found during this loop,
1520                  * set a minimal timeout */
1521                 if ( ncandidates > 0 && gotit == 0 ) {
1522                         if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
1523                                 save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1524
1525                                 /* arbitrarily limit to something between 1 and 2 minutes */
1526                         } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
1527                                 || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
1528                         {
1529                                 /* double the timeout */
1530                                 lutil_timermul( &save_tv, 2, &save_tv );
1531                         }
1532
1533                         if ( alreadybound == 0 ) {
1534                                 tv = save_tv;
1535                                 (void)select( 0, NULL, NULL, NULL, &tv );
1536
1537                         } else {
1538                                 ldap_pvt_thread_yield();
1539                         }
1540                 }
1541         }
1542
1543         if ( rc == -1 ) {
1544                 /*
1545                  * FIXME: need a better strategy to handle errors
1546                  */
1547                 if ( mc ) {
1548                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1549                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1550                                 LDAP_BACK_SENDERR );
1551                 } else {
1552                         rc = rs->sr_err;
1553                 }
1554                 goto finish;
1555         }
1556
1557         /*
1558          * Rewrite the matched portion of the search base, if required
1559          *
1560          * FIXME: only the last one gets caught!
1561          */
1562         savepriv = op->o_private;
1563         op->o_private = (void *)(long)mi->mi_ntargets;
1564         if ( candidate_match > 0 ) {
1565                 struct berval   pmatched = BER_BVNULL;
1566
1567                 /* we use the first one */
1568                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1569                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1570                                         && candidates[ i ].sr_matched != NULL )
1571                         {
1572                                 struct berval   bv, pbv;
1573                                 int             rc;
1574
1575                                 /* if we got success, and this target
1576                                  * returned noSuchObject, and its suffix
1577                                  * is a superior of the searchBase,
1578                                  * ignore the matchedDN */
1579                                 if ( sres == LDAP_SUCCESS
1580                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1581                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1582                                 {
1583                                         free( (char *)candidates[ i ].sr_matched );
1584                                         candidates[ i ].sr_matched = NULL;
1585                                         continue;
1586                                 }
1587
1588                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1589                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1590
1591                                 if ( rc == LDAP_SUCCESS ) {
1592
1593                                         /* NOTE: if they all are superiors
1594                                          * of the baseDN, the shorter is also
1595                                          * superior of the longer... */
1596                                         if ( pbv.bv_len > pmatched.bv_len ) {
1597                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1598                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1599                                                 }
1600                                                 pmatched = pbv;
1601                                                 op->o_private = (void *)i;
1602
1603                                         } else {
1604                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1605                                         }
1606                                 }
1607
1608                                 if ( candidates[ i ].sr_matched != NULL ) {
1609                                         free( (char *)candidates[ i ].sr_matched );
1610                                         candidates[ i ].sr_matched = NULL;
1611                                 }
1612                         }
1613                 }
1614
1615                 if ( !BER_BVISNULL( &pmatched ) ) {
1616                         matched = pmatched.bv_val;
1617                 }
1618
1619         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1620                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1621         }
1622
1623         /*
1624          * In case we returned at least one entry, we return LDAP_SUCCESS
1625          * otherwise, the latter error code we got
1626          */
1627
1628         if ( sres == LDAP_SUCCESS ) {
1629                 if ( rs->sr_v2ref ) {
1630                         sres = LDAP_REFERRAL;
1631                 }
1632
1633                 if ( META_BACK_ONERR_REPORT( mi ) ) {
1634                         /*
1635                          * Report errors, if any
1636                          *
1637                          * FIXME: we should handle error codes and return the more
1638                          * important/reasonable
1639                          */
1640                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1641                                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1642                                         continue;
1643                                 }
1644
1645                                 if ( candidates[ i ].sr_err != LDAP_SUCCESS
1646                                         && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
1647                                 {
1648                                         sres = candidates[ i ].sr_err;
1649                                         break;
1650                                 }
1651                         }
1652                 }
1653         }
1654
1655         rs->sr_err = sres;
1656         rs->sr_matched = matched;
1657         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1658         send_ldap_result( op, rs );
1659         op->o_private = savepriv;
1660         rs->sr_matched = NULL;
1661         rs->sr_ref = NULL;
1662
1663 finish:;
1664         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1665                 op->o_tmpfree( matched, op->o_tmpmemctx );
1666         }
1667
1668         if ( rs->sr_v2ref ) {
1669                 ber_bvarray_free( rs->sr_v2ref );
1670         }
1671
1672         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1673                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1674                         continue;
1675                 }
1676
1677                 if ( mc ) {
1678                         if ( META_IS_BINDING( &candidates[ i ] )
1679                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1680                         {
1681                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1682                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
1683                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1684                                 {
1685                                         assert( candidates[ i ].sr_msgid >= 0
1686                                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING );
1687                                         assert( mc->mc_conns[ i ].msc_ld != NULL );
1688
1689 #ifdef DEBUG_205
1690                                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
1691                                                 "ldap_unbind_ext[%ld] ld=%p\n",
1692                                                 op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
1693 #endif /* DEBUG_205 */
1694
1695                                         /* if still binding, destroy */
1696                                         meta_clear_one_candidate( op, mc, i );
1697                                 }
1698                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1699                                 META_BINDING_CLEAR( &candidates[ i ] );
1700
1701                         } else if ( candidates[ i ].sr_msgid >= 0 ) {
1702                                 (void)meta_back_cancel( mc, op, rs,
1703                                         candidates[ i ].sr_msgid, i,
1704                                         LDAP_BACK_DONTSEND );
1705                         }
1706                 }
1707
1708                 if ( candidates[ i ].sr_matched ) {
1709                         free( (char *)candidates[ i ].sr_matched );
1710                         candidates[ i ].sr_matched = NULL;
1711                 }
1712
1713                 if ( candidates[ i ].sr_text ) {
1714                         ldap_memfree( (char *)candidates[ i ].sr_text );
1715                         candidates[ i ].sr_text = NULL;
1716                 }
1717
1718                 if ( candidates[ i ].sr_ref ) {
1719                         ber_bvarray_free( candidates[ i ].sr_ref );
1720                         candidates[ i ].sr_ref = NULL;
1721                 }
1722
1723                 if ( candidates[ i ].sr_ctrls ) {
1724                         ldap_controls_free( candidates[ i ].sr_ctrls );
1725                         candidates[ i ].sr_ctrls = NULL;
1726                 }
1727
1728                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1729                         meta_back_quarantine( op, &candidates[ i ], i );
1730                 }
1731
1732                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1733                  * one contacted target never responded, invalidate the connection
1734                  * NOTE: should we quarantine the target as well?  right now, the connection
1735                  * is invalidated; the next time it will be recreated and the target
1736                  * will be quarantined if it cannot be contacted */
1737                 if ( mi->mi_idle_timeout != 0
1738                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1739                         && op->o_time > mc->mc_conns[ i ].msc_time )
1740                 {
1741                         /* don't let anyone else use this expired connection */
1742                         LDAP_BACK_CONN_TAINTED_SET( mc );
1743                 }
1744         }
1745
1746         if ( mc ) {
1747                 meta_back_release_conn( mi, mc );
1748         }
1749
1750         return rs->sr_err;
1751 }
1752
1753 static int
1754 meta_send_entry(
1755         Operation       *op,
1756         SlapReply       *rs,
1757         metaconn_t      *mc,
1758         int             target,
1759         LDAPMessage     *e )
1760 {
1761         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1762         struct berval           a, mapped;
1763         int                     check_duplicate_attrs = 0;
1764         Entry                   ent = { 0 };
1765         BerElement              ber = *e->lm_ber;
1766         Attribute               *attr, **attrp;
1767         struct berval           bdn,
1768                                 dn = BER_BVNULL;
1769         const char              *text;
1770         dncookie                dc;
1771         int                     rc;
1772
1773         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1774                 return LDAP_DECODING_ERROR;
1775         }
1776
1777         /*
1778          * Rewrite the dn of the result, if needed
1779          */
1780         dc.target = mi->mi_targets[ target ];
1781         dc.conn = op->o_conn;
1782         dc.rs = rs;
1783         dc.ctx = "searchResult";
1784
1785         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1786         if ( rs->sr_err != LDAP_SUCCESS) {
1787                 return rs->sr_err;
1788         }
1789
1790         /*
1791          * Note: this may fail if the target host(s) schema differs
1792          * from the one known to the meta, and a DN with unknown
1793          * attributes is returned.
1794          *
1795          * FIXME: should we log anything, or delegate to dnNormalize?
1796          */
1797         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1798                 op->o_tmpmemctx );
1799         if ( dn.bv_val != bdn.bv_val ) {
1800                 free( dn.bv_val );
1801         }
1802         BER_BVZERO( &dn );
1803
1804         if ( rc != LDAP_SUCCESS ) {
1805                 return LDAP_INVALID_DN_SYNTAX;
1806         }
1807
1808         /*
1809          * cache dn
1810          */
1811         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1812                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1813                                 &ent.e_nname, target );
1814         }
1815
1816         attrp = &ent.e_attrs;
1817
1818         dc.ctx = "searchAttrDN";
1819         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1820                 int                             last = 0;
1821                 slap_syntax_validate_func       *validate;
1822                 slap_syntax_transform_func      *pretty;
1823
1824                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1825                                 &a, &mapped, BACKLDAP_REMAP );
1826                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1827                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1828                         continue;
1829                 }
1830                 if ( mapped.bv_val != a.bv_val ) {
1831                         /* will need to check for duplicate attrs */
1832                         check_duplicate_attrs++;
1833                 }
1834                 attr = attr_alloc( NULL );
1835                 if ( attr == NULL ) {
1836                         continue;
1837                 }
1838                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1839                                 != LDAP_SUCCESS) {
1840                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1841                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1842                         {
1843                                 char    buf[ SLAP_TEXT_BUFLEN ];
1844
1845                                 snprintf( buf, sizeof( buf ),
1846                                         "%s meta_send_entry(\"%s\"): "
1847                                         "slap_bv2undef_ad(%s): %s\n",
1848                                         op->o_log_prefix, ent.e_name.bv_val,
1849                                         mapped.bv_val, text );
1850
1851                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1852                                 attr_free( attr );
1853                                 continue;
1854                         }
1855                 }
1856
1857                 /* no subschemaSubentry */
1858                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1859                         || attr->a_desc == slap_schema.si_ad_entryDN )
1860                 {
1861
1862                         /*
1863                          * We eat target's subschemaSubentry because
1864                          * a search for this value is likely not
1865                          * to resolve to the appropriate backend;
1866                          * later, the local subschemaSubentry is
1867                          * added.
1868                          *
1869                          * We also eat entryDN because the frontend
1870                          * will reattach it without checking if already
1871                          * present...
1872                          */
1873                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1874
1875                         attr_free(attr);
1876                         continue;
1877                 }
1878
1879                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1880                                 || attr->a_vals == NULL )
1881                 {
1882                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1883
1884                 } else {
1885                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1886                                 ;
1887                 }
1888                 attr->a_numvals = last;
1889
1890                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1891                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1892
1893                 if ( !validate && !pretty ) {
1894                         attr_free( attr );
1895                         goto next_attr;
1896                 }
1897
1898                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1899                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1900                 {
1901                         struct berval   *bv;
1902
1903                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1904                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1905                                                 bv, &mapped, BACKLDAP_REMAP );
1906                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1907 remove_oc:;
1908                                         free( bv->bv_val );
1909                                         BER_BVZERO( bv );
1910                                         if ( --last < 0 ) {
1911                                                 break;
1912                                         }
1913                                         *bv = attr->a_vals[ last ];
1914                                         BER_BVZERO( &attr->a_vals[ last ] );
1915                                         bv--;
1916
1917                                 } else if ( mapped.bv_val != bv->bv_val ) {
1918                                         int     i;
1919
1920                                         for ( i = 0; !BER_BVISNULL( &attr->a_vals[ i ] ); i++ ) {
1921                                                 if ( &attr->a_vals[ i ] == bv ) {
1922                                                         continue;
1923                                                 }
1924
1925                                                 if ( ber_bvstrcasecmp( &mapped, &attr->a_vals[ i ] ) == 0 ) {
1926                                                         break;
1927                                                 }
1928                                         }
1929
1930                                         if ( !BER_BVISNULL( &attr->a_vals[ i ] ) ) {
1931                                                 goto remove_oc;
1932                                         }
1933
1934                                         ber_bvreplace( bv, &mapped );
1935                                 }
1936                         }
1937                 /*
1938                  * It is necessary to try to rewrite attributes with
1939                  * dn syntax because they might be used in ACLs as
1940                  * members of groups; since ACLs are applied to the
1941                  * rewritten stuff, no dn-based subecj clause could
1942                  * be used at the ldap backend side (see
1943                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1944                  * The problem can be overcome by moving the dn-based
1945                  * ACLs to the target directory server, and letting
1946                  * everything pass thru the ldap backend.
1947                  */
1948                 } else {
1949                         int     i;
1950
1951                         if ( attr->a_desc->ad_type->sat_syntax ==
1952                                 slap_schema.si_syn_distinguishedName )
1953                         {
1954                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1955
1956                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1957                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1958
1959                         }
1960
1961                         for ( i = 0; i < last; i++ ) {
1962                                 struct berval   pval;
1963                                 int             rc;
1964
1965                                 if ( pretty ) {
1966                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1967                                                 &attr->a_vals[i], &pval, NULL );
1968
1969                                 } else {
1970                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1971                                                 &attr->a_vals[i] );
1972                                 }
1973
1974                                 if ( rc ) {
1975                                         LBER_FREE( attr->a_vals[i].bv_val );
1976                                         if ( --last == i ) {
1977                                                 BER_BVZERO( &attr->a_vals[ i ] );
1978                                                 break;
1979                                         }
1980                                         attr->a_vals[i] = attr->a_vals[last];
1981                                         BER_BVZERO( &attr->a_vals[last] );
1982                                         i--;
1983                                         continue;
1984                                 }
1985
1986                                 if ( pretty ) {
1987                                         LBER_FREE( attr->a_vals[i].bv_val );
1988                                         attr->a_vals[i] = pval;
1989                                 }
1990                         }
1991
1992                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
1993                                 attr_free( attr );
1994                                 goto next_attr;
1995                         }
1996                 }
1997
1998                 if ( last && attr->a_desc->ad_type->sat_equality &&
1999                         attr->a_desc->ad_type->sat_equality->smr_normalize )
2000                 {
2001                         int i;
2002
2003                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
2004                         for ( i = 0; i<last; i++ ) {
2005                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
2006                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
2007                                         attr->a_desc->ad_type->sat_syntax,
2008                                         attr->a_desc->ad_type->sat_equality,
2009                                         &attr->a_vals[i], &attr->a_nvals[i],
2010                                         NULL );
2011                         }
2012                         BER_BVZERO( &attr->a_nvals[i] );
2013
2014                 } else {
2015                         attr->a_nvals = attr->a_vals;
2016                 }
2017
2018                 *attrp = attr;
2019                 attrp = &attr->a_next;
2020 next_attr:;
2021         }
2022
2023         /* only check if some mapping occurred */
2024         if ( check_duplicate_attrs ) {
2025                 Attribute       **ap;
2026
2027                 for ( ap = &ent.e_attrs; *ap != NULL; ap = &(*ap)->a_next ) {
2028                         Attribute       **tap;
2029
2030                         for ( tap = &(*ap)->a_next; *tap != NULL; ) {
2031                                 if ( (*tap)->a_desc == (*ap)->a_desc ) {
2032                                         Entry           e = { 0 };
2033                                         Modification    mod = { 0 };
2034                                         const char      *text = NULL;
2035                                         char            textbuf[ SLAP_TEXT_BUFLEN ];
2036                                         Attribute       *next = (*tap)->a_next;
2037
2038                                         BER_BVSTR( &e.e_name, "" );
2039                                         BER_BVSTR( &e.e_nname, "" );
2040                                         e.e_attrs = *ap;
2041                                         mod.sm_op = LDAP_MOD_ADD;
2042                                         mod.sm_desc = (*ap)->a_desc;
2043                                         mod.sm_type = mod.sm_desc->ad_cname;
2044                                         mod.sm_numvals = (*ap)->a_numvals;
2045                                         mod.sm_values = (*tap)->a_vals;
2046                                         if ( (*tap)->a_nvals != (*tap)->a_vals ) {
2047                                                 mod.sm_nvalues = (*tap)->a_nvals;
2048                                         }
2049
2050                                         (void)modify_add_values( &e, &mod,
2051                                                 /* permissive */ 1,
2052                                                 &text, textbuf, sizeof( textbuf ) );
2053
2054                                         /* should not insert new attrs! */
2055                                         assert( e.e_attrs == *ap );
2056
2057                                         attr_free( *tap );
2058                                         *tap = next;
2059
2060                                 } else {
2061                                         tap = &(*tap)->a_next;
2062                                 }
2063                         }
2064                 }
2065         }
2066
2067         ldap_get_entry_controls( mc->mc_conns[target].msc_ld,
2068                 e, &rs->sr_ctrls );
2069         rs->sr_entry = &ent;
2070         rs->sr_attrs = op->ors_attrs;
2071         rs->sr_operational_attrs = NULL;
2072         rs->sr_flags = 0;
2073         rs->sr_err = LDAP_SUCCESS;
2074         rc = send_search_entry( op, rs );
2075         switch ( rc ) {
2076         case LDAP_UNAVAILABLE:
2077                 rc = LDAP_OTHER;
2078                 break;
2079         }
2080         rs->sr_entry = NULL;
2081         rs->sr_attrs = NULL;
2082         if ( rs->sr_ctrls != NULL ) {
2083                 ldap_controls_free( rs->sr_ctrls );
2084                 rs->sr_ctrls = NULL;
2085         }
2086         if ( !BER_BVISNULL( &ent.e_name ) ) {
2087                 free( ent.e_name.bv_val );
2088                 BER_BVZERO( &ent.e_name );
2089         }
2090         if ( !BER_BVISNULL( &ent.e_nname ) ) {
2091                 free( ent.e_nname.bv_val );
2092                 BER_BVZERO( &ent.e_nname );
2093         }
2094         entry_clean( &ent );
2095
2096         return rc;
2097 }
2098