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 ( META_BACK_TGT_NOREFS( mi->mi_targets[ i ] ) ) {
1159                                                 continue;
1160                                         }
1161
1162                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1163                                                 /* don't retry any more... */
1164                                                 candidates[ i ].sr_type = REP_RESULT;
1165                                         }
1166
1167                                         is_ok++;
1168
1169                                         rc = ldap_parse_reference( msc->msc_ld, msg,
1170                                                         &references, &rs->sr_ctrls, 0 );
1171
1172                                         if ( rc != LDAP_SUCCESS ) {
1173                                                 continue;
1174                                         }
1175
1176                                         if ( references == NULL ) {
1177                                                 continue;
1178                                         }
1179
1180 #ifdef ENABLE_REWRITE
1181                                         dc.ctx = "referralDN";
1182 #else /* ! ENABLE_REWRITE */
1183                                         dc.tofrom = 0;
1184                                         dc.normalized = 0;
1185 #endif /* ! ENABLE_REWRITE */
1186
1187                                         /* FIXME: merge all and return at the end */
1188
1189                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1190                                                 ;
1191
1192                                         rs->sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1193
1194                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1195                                                 ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
1196                                         }
1197                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
1198
1199                                         ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref );
1200
1201                                         if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
1202                                                 /* ignore return value by now */
1203                                                 savepriv = op->o_private;
1204                                                 op->o_private = (void *)i;
1205                                                 ( void )send_search_reference( op, rs );
1206                                                 op->o_private = savepriv;
1207
1208                                                 ber_bvarray_free( rs->sr_ref );
1209                                                 rs->sr_ref = NULL;
1210                                         }
1211
1212                                         /* cleanup */
1213                                         if ( references ) {
1214                                                 ber_memvfree( (void **)references );
1215                                         }
1216
1217                                         if ( rs->sr_ctrls ) {
1218                                                 ldap_controls_free( rs->sr_ctrls );
1219                                                 rs->sr_ctrls = NULL;
1220                                         }
1221
1222                                 } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
1223                                         char            buf[ SLAP_TEXT_BUFLEN ];
1224                                         char            **references = NULL;
1225
1226                                         if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
1227                                                 /* don't retry any more... */
1228                                                 candidates[ i ].sr_type = REP_RESULT;
1229                                         }
1230
1231                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1232
1233                                         /* NOTE: ignores response controls
1234                                          * (and intermediate response controls
1235                                          * as well, except for those with search
1236                                          * references); this may not be correct,
1237                                          * but if they're not ignored then
1238                                          * back-meta would need to merge them
1239                                          * consistently (think of pagedResults...)
1240                                          */
1241                                         /* FIXME: response controls? */
1242                                         rs->sr_err = ldap_parse_result( msc->msc_ld,
1243                                                 msg,
1244                                                 &candidates[ i ].sr_err,
1245                                                 (char **)&candidates[ i ].sr_matched,
1246                                                 NULL /* (char **)&candidates[ i ].sr_text */ ,
1247                                                 &references,
1248                                                 NULL /* &candidates[ i ].sr_ctrls (unused) */ ,
1249                                                 0 );
1250                                         if ( rs->sr_err != LDAP_SUCCESS ) {
1251                                                 sres = slap_map_api2result( &candidates[ i ] );
1252                                                 candidates[ i ].sr_type = REP_RESULT;
1253                                                 ldap_msgfree( res );
1254                                                 res = NULL;
1255                                                 goto really_bad;
1256                                         }
1257
1258                                         rs->sr_err = candidates[ i ].sr_err;
1259
1260                                         /* massage matchedDN if need be */
1261                                         if ( candidates[ i ].sr_matched != NULL ) {
1262                                                 struct berval   match, mmatch;
1263
1264                                                 ber_str2bv( candidates[ i ].sr_matched,
1265                                                         0, 0, &match );
1266                                                 candidates[ i ].sr_matched = NULL;
1267
1268                                                 dc.ctx = "matchedDN";
1269                                                 dc.target = mi->mi_targets[ i ];
1270                                                 if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
1271                                                         if ( mmatch.bv_val == match.bv_val ) {
1272                                                                 candidates[ i ].sr_matched
1273                                                                         = ch_strdup( mmatch.bv_val );
1274
1275                                                         } else {
1276                                                                 candidates[ i ].sr_matched = mmatch.bv_val;
1277                                                         }
1278
1279                                                         candidate_match++;
1280                                                 }
1281                                                 ldap_memfree( match.bv_val );
1282                                         }
1283
1284                                         /* add references to array */
1285                                         /* RFC 4511: referrals can only appear
1286                                          * if result code is LDAP_REFERRAL */
1287                                         if ( references != NULL
1288                                                 && references[ 0 ] != NULL
1289                                                 && references[ 0 ][ 0 ] != '\0' )
1290                                         {
1291                                                 if ( rs->sr_err != LDAP_REFERRAL ) {
1292                                                         Debug( LDAP_DEBUG_ANY,
1293                                                                 "%s meta_back_search[%ld]: "
1294                                                                 "got referrals with err=%d\n",
1295                                                                 op->o_log_prefix,
1296                                                                 i, rs->sr_err );
1297
1298                                                 } else {
1299                                                         BerVarray       sr_ref;
1300                                                         int             cnt;
1301
1302                                                         for ( cnt = 0; references[ cnt ]; cnt++ )
1303                                                                 ;
1304
1305                                                         sr_ref = ch_calloc( sizeof( struct berval ), cnt + 1 );
1306
1307                                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
1308                                                                 ber_str2bv( references[ cnt ], 0, 1, &sr_ref[ cnt ] );
1309                                                         }
1310                                                         BER_BVZERO( &sr_ref[ cnt ] );
1311
1312                                                         ( void )ldap_back_referral_result_rewrite( &dc, sr_ref );
1313
1314                                                         if ( rs->sr_v2ref == NULL ) {
1315                                                                 rs->sr_v2ref = sr_ref;
1316
1317                                                         } else {
1318                                                                 for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
1319                                                                         ber_bvarray_add( &rs->sr_v2ref, &sr_ref[ cnt ] );
1320                                                                 }
1321                                                                 ber_memfree( sr_ref );
1322                                                         }
1323                                                 }
1324
1325                                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
1326                                                 Debug( LDAP_DEBUG_ANY,
1327                                                         "%s meta_back_search[%ld]: "
1328                                                         "got err=%d with null "
1329                                                         "or empty referrals\n",
1330                                                         op->o_log_prefix,
1331                                                         i, rs->sr_err );
1332
1333                                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1334                                         }
1335
1336                                         /* cleanup */
1337                                         ber_memvfree( (void **)references );
1338
1339                                         sres = slap_map_api2result( rs );
1340
1341                                         if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
1342                                                 snprintf( buf, sizeof( buf ),
1343                                                         "%s meta_back_search[%ld] "
1344                                                         "match=\"%s\" err=%ld",
1345                                                         op->o_log_prefix, i,
1346                                                         candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
1347                                                         (long) candidates[ i ].sr_err );
1348                                                 if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
1349                                                         Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
1350
1351                                                 } else {
1352                                                         Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
1353                                                                 buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
1354                                                 }
1355                                         }
1356
1357                                         switch ( sres ) {
1358                                         case LDAP_NO_SUCH_OBJECT:
1359                                                 /* is_ok is touched any time a valid
1360                                                  * (even intermediate) result is
1361                                                  * returned; as a consequence, if
1362                                                  * a candidate returns noSuchObject
1363                                                  * it is ignored and the candidate
1364                                                  * is simply demoted. */
1365                                                 if ( is_ok ) {
1366                                                         sres = LDAP_SUCCESS;
1367                                                 }
1368                                                 break;
1369
1370                                         case LDAP_SUCCESS:
1371                                         case LDAP_REFERRAL:
1372                                                 is_ok++;
1373                                                 break;
1374
1375                                         case LDAP_SIZELIMIT_EXCEEDED:
1376                                                 /* if a target returned sizelimitExceeded
1377                                                  * and the entry count is equal to the
1378                                                  * proxy's limit, the target would have
1379                                                  * returned more, and the error must be
1380                                                  * propagated to the client; otherwise,
1381                                                  * the target enforced a limit lower
1382                                                  * than what requested by the proxy;
1383                                                  * ignore it */
1384                                                 candidates[ i ].sr_err = rs->sr_err;
1385                                                 if ( rs->sr_nentries == op->ors_slimit
1386                                                         || META_BACK_ONERR_STOP( mi ) )
1387                                                 {
1388                                                         savepriv = op->o_private;
1389                                                         op->o_private = (void *)i;
1390                                                         send_ldap_result( op, rs );
1391                                                         op->o_private = savepriv;
1392                                                         ldap_msgfree( res );
1393                                                         res = NULL;
1394                                                         goto finish;
1395                                                 }
1396                                                 break;
1397
1398                                         default:
1399                                                 candidates[ i ].sr_err = rs->sr_err;
1400                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1401                                                         savepriv = op->o_private;
1402                                                         op->o_private = (void *)i;
1403                                                         send_ldap_result( op, rs );
1404                                                         op->o_private = savepriv;
1405                                                         ldap_msgfree( res );
1406                                                         res = NULL;
1407                                                         goto finish;
1408                                                 }
1409                                                 break;
1410                                         }
1411
1412                                         last = i;
1413                                         rc = 0;
1414
1415                                         /*
1416                                          * When no candidates are left,
1417                                          * the outer cycle finishes
1418                                          */
1419                                         assert( ncandidates > 0 );
1420                                         --ncandidates;
1421
1422                                 } else if ( rc == LDAP_RES_BIND ) {
1423                                         meta_search_candidate_t retcode;
1424
1425                                         retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
1426                                         if ( retcode == META_SEARCH_CANDIDATE ) {
1427                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1428                                                 retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates );
1429                                         }
1430
1431                                         switch ( retcode ) {
1432                                         case META_SEARCH_CANDIDATE:
1433                                                 break;
1434
1435                                                 /* means that failed but onerr == continue */
1436                                         case META_SEARCH_NOT_CANDIDATE:
1437                                         case META_SEARCH_ERR:
1438                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1439                                                 assert( ncandidates > 0 );
1440                                                 --ncandidates;
1441
1442                                                 candidates[ i ].sr_err = rs->sr_err;
1443                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
1444                                                         savepriv = op->o_private;
1445                                                         op->o_private = (void *)i;
1446                                                         send_ldap_result( op, rs );
1447                                                         op->o_private = savepriv;
1448                                                         ldap_msgfree( res );
1449                                                         res = NULL;
1450                                                         goto finish;
1451                                                 }
1452                                                 goto free_message;
1453
1454                                         default:
1455                                                 assert( 0 );
1456                                                 break;
1457                                         }
1458
1459                                 } else {
1460                                         assert( 0 );
1461                                         ldap_msgfree( res );
1462                                         res = NULL;
1463                                         goto really_bad;
1464                                 }
1465                         }
1466
1467 free_message:;
1468                         ldap_msgfree( res );
1469                         res = NULL;
1470                 }
1471
1472                 /* check for abandon */
1473                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
1474                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1475                                 if ( candidates[ i ].sr_msgid >= 0
1476                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1477                                 {
1478                                         if ( META_IS_BINDING( &candidates[ i ] )
1479                                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1480                                         {
1481                                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1482                                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
1483                                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1484                                                 {
1485                                                         /* if still binding, destroy */
1486
1487 #ifdef DEBUG_205
1488                                                         char buf[ SLAP_TEXT_BUFLEN ];
1489
1490                                                         snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
1491                                                                 "ldap_unbind_ext[%ld] mc=%p ld=%p",
1492                                                                 op->o_log_prefix, i, (void *)mc,
1493                                                                 (void *)mc->mc_conns[i].msc_ld );
1494
1495                                                         Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
1496 #endif /* DEBUG_205 */
1497
1498                                                         meta_clear_one_candidate( op, mc, i );
1499                                                 }
1500                                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1501                                                 META_BINDING_CLEAR( &candidates[ i ] );
1502
1503                                         } else {
1504                                                 (void)meta_back_cancel( mc, op, rs,
1505                                                         candidates[ i ].sr_msgid, i,
1506                                                         LDAP_BACK_DONTSEND );
1507                                         }
1508
1509                                         candidates[ i ].sr_msgid = META_MSGID_IGNORE;
1510                                         assert( ncandidates > 0 );
1511                                         --ncandidates;
1512                                 }
1513                         }
1514
1515                         if ( op->o_abandon ) {
1516                                 rc = SLAPD_ABANDON;
1517                         }
1518
1519                         /* let send_ldap_result play cleanup handlers (ITS#4645) */
1520                         break;
1521                 }
1522
1523                 /* if no entry was found during this loop,
1524                  * set a minimal timeout */
1525                 if ( ncandidates > 0 && gotit == 0 ) {
1526                         if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
1527                                 save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;
1528
1529                                 /* arbitrarily limit to something between 1 and 2 minutes */
1530                         } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
1531                                 || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
1532                         {
1533                                 /* double the timeout */
1534                                 lutil_timermul( &save_tv, 2, &save_tv );
1535                         }
1536
1537                         if ( alreadybound == 0 ) {
1538                                 tv = save_tv;
1539                                 (void)select( 0, NULL, NULL, NULL, &tv );
1540
1541                         } else {
1542                                 ldap_pvt_thread_yield();
1543                         }
1544                 }
1545         }
1546
1547         if ( rc == -1 ) {
1548                 /*
1549                  * FIXME: need a better strategy to handle errors
1550                  */
1551                 if ( mc ) {
1552                         rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
1553                                 -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
1554                                 LDAP_BACK_SENDERR );
1555                 } else {
1556                         rc = rs->sr_err;
1557                 }
1558                 goto finish;
1559         }
1560
1561         /*
1562          * Rewrite the matched portion of the search base, if required
1563          *
1564          * FIXME: only the last one gets caught!
1565          */
1566         savepriv = op->o_private;
1567         op->o_private = (void *)(long)mi->mi_ntargets;
1568         if ( candidate_match > 0 ) {
1569                 struct berval   pmatched = BER_BVNULL;
1570
1571                 /* we use the first one */
1572                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1573                         if ( META_IS_CANDIDATE( &candidates[ i ] )
1574                                         && candidates[ i ].sr_matched != NULL )
1575                         {
1576                                 struct berval   bv, pbv;
1577                                 int             rc;
1578
1579                                 /* if we got success, and this target
1580                                  * returned noSuchObject, and its suffix
1581                                  * is a superior of the searchBase,
1582                                  * ignore the matchedDN */
1583                                 if ( sres == LDAP_SUCCESS
1584                                         && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
1585                                         && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
1586                                 {
1587                                         free( (char *)candidates[ i ].sr_matched );
1588                                         candidates[ i ].sr_matched = NULL;
1589                                         continue;
1590                                 }
1591
1592                                 ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
1593                                 rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );
1594
1595                                 if ( rc == LDAP_SUCCESS ) {
1596
1597                                         /* NOTE: if they all are superiors
1598                                          * of the baseDN, the shorter is also
1599                                          * superior of the longer... */
1600                                         if ( pbv.bv_len > pmatched.bv_len ) {
1601                                                 if ( !BER_BVISNULL( &pmatched ) ) {
1602                                                         op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
1603                                                 }
1604                                                 pmatched = pbv;
1605                                                 op->o_private = (void *)i;
1606
1607                                         } else {
1608                                                 op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
1609                                         }
1610                                 }
1611
1612                                 if ( candidates[ i ].sr_matched != NULL ) {
1613                                         free( (char *)candidates[ i ].sr_matched );
1614                                         candidates[ i ].sr_matched = NULL;
1615                                 }
1616                         }
1617                 }
1618
1619                 if ( !BER_BVISNULL( &pmatched ) ) {
1620                         matched = pmatched.bv_val;
1621                 }
1622
1623         } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
1624                 matched = op->o_bd->be_suffix[ 0 ].bv_val;
1625         }
1626
1627         /*
1628          * In case we returned at least one entry, we return LDAP_SUCCESS
1629          * otherwise, the latter error code we got
1630          */
1631
1632         if ( sres == LDAP_SUCCESS ) {
1633                 if ( rs->sr_v2ref ) {
1634                         sres = LDAP_REFERRAL;
1635                 }
1636
1637                 if ( META_BACK_ONERR_REPORT( mi ) ) {
1638                         /*
1639                          * Report errors, if any
1640                          *
1641                          * FIXME: we should handle error codes and return the more
1642                          * important/reasonable
1643                          */
1644                         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1645                                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1646                                         continue;
1647                                 }
1648
1649                                 if ( candidates[ i ].sr_err != LDAP_SUCCESS
1650                                         && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
1651                                 {
1652                                         sres = candidates[ i ].sr_err;
1653                                         break;
1654                                 }
1655                         }
1656                 }
1657         }
1658
1659         rs->sr_err = sres;
1660         rs->sr_matched = matched;
1661         rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
1662         send_ldap_result( op, rs );
1663         op->o_private = savepriv;
1664         rs->sr_matched = NULL;
1665         rs->sr_ref = NULL;
1666
1667 finish:;
1668         if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
1669                 op->o_tmpfree( matched, op->o_tmpmemctx );
1670         }
1671
1672         if ( rs->sr_v2ref ) {
1673                 ber_bvarray_free( rs->sr_v2ref );
1674         }
1675
1676         for ( i = 0; i < mi->mi_ntargets; i++ ) {
1677                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
1678                         continue;
1679                 }
1680
1681                 if ( mc ) {
1682                         if ( META_IS_BINDING( &candidates[ i ] )
1683                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1684                         {
1685                                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
1686                                 if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
1687                                         || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
1688                                 {
1689                                         assert( candidates[ i ].sr_msgid >= 0
1690                                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING );
1691                                         assert( mc->mc_conns[ i ].msc_ld != NULL );
1692
1693 #ifdef DEBUG_205
1694                                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
1695                                                 "ldap_unbind_ext[%ld] ld=%p\n",
1696                                                 op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
1697 #endif /* DEBUG_205 */
1698
1699                                         /* if still binding, destroy */
1700                                         meta_clear_one_candidate( op, mc, i );
1701                                 }
1702                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
1703                                 META_BINDING_CLEAR( &candidates[ i ] );
1704
1705                         } else if ( candidates[ i ].sr_msgid >= 0 ) {
1706                                 (void)meta_back_cancel( mc, op, rs,
1707                                         candidates[ i ].sr_msgid, i,
1708                                         LDAP_BACK_DONTSEND );
1709                         }
1710                 }
1711
1712                 if ( candidates[ i ].sr_matched ) {
1713                         free( (char *)candidates[ i ].sr_matched );
1714                         candidates[ i ].sr_matched = NULL;
1715                 }
1716
1717                 if ( candidates[ i ].sr_text ) {
1718                         ldap_memfree( (char *)candidates[ i ].sr_text );
1719                         candidates[ i ].sr_text = NULL;
1720                 }
1721
1722                 if ( candidates[ i ].sr_ref ) {
1723                         ber_bvarray_free( candidates[ i ].sr_ref );
1724                         candidates[ i ].sr_ref = NULL;
1725                 }
1726
1727                 if ( candidates[ i ].sr_ctrls ) {
1728                         ldap_controls_free( candidates[ i ].sr_ctrls );
1729                         candidates[ i ].sr_ctrls = NULL;
1730                 }
1731
1732                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1733                         meta_back_quarantine( op, &candidates[ i ], i );
1734                 }
1735
1736                 /* only in case of timelimit exceeded, if the timelimit exceeded because
1737                  * one contacted target never responded, invalidate the connection
1738                  * NOTE: should we quarantine the target as well?  right now, the connection
1739                  * is invalidated; the next time it will be recreated and the target
1740                  * will be quarantined if it cannot be contacted */
1741                 if ( mi->mi_idle_timeout != 0
1742                         && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
1743                         && op->o_time > mc->mc_conns[ i ].msc_time )
1744                 {
1745                         /* don't let anyone else use this expired connection */
1746                         LDAP_BACK_CONN_TAINTED_SET( mc );
1747                 }
1748         }
1749
1750         if ( mc ) {
1751                 meta_back_release_conn( mi, mc );
1752         }
1753
1754         return rs->sr_err;
1755 }
1756
1757 static int
1758 meta_send_entry(
1759         Operation       *op,
1760         SlapReply       *rs,
1761         metaconn_t      *mc,
1762         int             target,
1763         LDAPMessage     *e )
1764 {
1765         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
1766         struct berval           a, mapped;
1767         int                     check_duplicate_attrs = 0;
1768         Entry                   ent = { 0 };
1769         BerElement              ber = *e->lm_ber;
1770         Attribute               *attr, **attrp;
1771         struct berval           bdn,
1772                                 dn = BER_BVNULL;
1773         const char              *text;
1774         dncookie                dc;
1775         int                     rc;
1776
1777         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
1778                 return LDAP_DECODING_ERROR;
1779         }
1780
1781         /*
1782          * Rewrite the dn of the result, if needed
1783          */
1784         dc.target = mi->mi_targets[ target ];
1785         dc.conn = op->o_conn;
1786         dc.rs = rs;
1787         dc.ctx = "searchResult";
1788
1789         rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
1790         if ( rs->sr_err != LDAP_SUCCESS) {
1791                 return rs->sr_err;
1792         }
1793
1794         /*
1795          * Note: this may fail if the target host(s) schema differs
1796          * from the one known to the meta, and a DN with unknown
1797          * attributes is returned.
1798          *
1799          * FIXME: should we log anything, or delegate to dnNormalize?
1800          */
1801         rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
1802                 op->o_tmpmemctx );
1803         if ( dn.bv_val != bdn.bv_val ) {
1804                 free( dn.bv_val );
1805         }
1806         BER_BVZERO( &dn );
1807
1808         if ( rc != LDAP_SUCCESS ) {
1809                 return LDAP_INVALID_DN_SYNTAX;
1810         }
1811
1812         /*
1813          * cache dn
1814          */
1815         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
1816                 ( void )meta_dncache_update_entry( &mi->mi_cache,
1817                                 &ent.e_nname, target );
1818         }
1819
1820         attrp = &ent.e_attrs;
1821
1822         dc.ctx = "searchAttrDN";
1823         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
1824                 int                             last = 0;
1825                 slap_syntax_validate_func       *validate;
1826                 slap_syntax_transform_func      *pretty;
1827
1828                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at,
1829                                 &a, &mapped, BACKLDAP_REMAP );
1830                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
1831                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1832                         continue;
1833                 }
1834                 if ( mapped.bv_val != a.bv_val ) {
1835                         /* will need to check for duplicate attrs */
1836                         check_duplicate_attrs++;
1837                 }
1838                 attr = attr_alloc( NULL );
1839                 if ( attr == NULL ) {
1840                         continue;
1841                 }
1842                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
1843                                 != LDAP_SUCCESS) {
1844                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
1845                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
1846                         {
1847                                 char    buf[ SLAP_TEXT_BUFLEN ];
1848
1849                                 snprintf( buf, sizeof( buf ),
1850                                         "%s meta_send_entry(\"%s\"): "
1851                                         "slap_bv2undef_ad(%s): %s\n",
1852                                         op->o_log_prefix, ent.e_name.bv_val,
1853                                         mapped.bv_val, text );
1854
1855                                 Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
1856                                 attr_free( attr );
1857                                 continue;
1858                         }
1859                 }
1860
1861                 /* no subschemaSubentry */
1862                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
1863                         || attr->a_desc == slap_schema.si_ad_entryDN )
1864                 {
1865
1866                         /*
1867                          * We eat target's subschemaSubentry because
1868                          * a search for this value is likely not
1869                          * to resolve to the appropriate backend;
1870                          * later, the local subschemaSubentry is
1871                          * added.
1872                          *
1873                          * We also eat entryDN because the frontend
1874                          * will reattach it without checking if already
1875                          * present...
1876                          */
1877                         ( void )ber_scanf( &ber, "x" /* [W] */ );
1878
1879                         attr_free(attr);
1880                         continue;
1881                 }
1882
1883                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
1884                                 || attr->a_vals == NULL )
1885                 {
1886                         attr->a_vals = (struct berval *)&slap_dummy_bv;
1887
1888                 } else {
1889                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
1890                                 ;
1891                 }
1892                 attr->a_numvals = last;
1893
1894                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
1895                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
1896
1897                 if ( !validate && !pretty ) {
1898                         attr_free( attr );
1899                         goto next_attr;
1900                 }
1901
1902                 if ( attr->a_desc == slap_schema.si_ad_objectClass
1903                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
1904                 {
1905                         struct berval   *bv;
1906
1907                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
1908                                 ObjectClass *oc;
1909
1910                                 ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
1911                                                 bv, &mapped, BACKLDAP_REMAP );
1912                                 if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
1913 remove_oc:;
1914                                         free( bv->bv_val );
1915                                         BER_BVZERO( bv );
1916                                         if ( --last < 0 ) {
1917                                                 break;
1918                                         }
1919                                         *bv = attr->a_vals[ last ];
1920                                         BER_BVZERO( &attr->a_vals[ last ] );
1921                                         bv--;
1922
1923                                 } else if ( mapped.bv_val != bv->bv_val ) {
1924                                         int     i;
1925
1926                                         for ( i = 0; !BER_BVISNULL( &attr->a_vals[ i ] ); i++ ) {
1927                                                 if ( &attr->a_vals[ i ] == bv ) {
1928                                                         continue;
1929                                                 }
1930
1931                                                 if ( ber_bvstrcasecmp( &mapped, &attr->a_vals[ i ] ) == 0 ) {
1932                                                         break;
1933                                                 }
1934                                         }
1935
1936                                         if ( !BER_BVISNULL( &attr->a_vals[ i ] ) ) {
1937                                                 goto remove_oc;
1938                                         }
1939
1940                                         ber_bvreplace( bv, &mapped );
1941
1942                                 } else if ( ( oc = oc_bvfind_undef( bv ) ) == NULL ) {
1943                                         goto remove_oc;
1944
1945                                 } else {
1946                                         ber_bvreplace( bv, &oc->soc_cname );
1947                                 }
1948                         }
1949                 /*
1950                  * It is necessary to try to rewrite attributes with
1951                  * dn syntax because they might be used in ACLs as
1952                  * members of groups; since ACLs are applied to the
1953                  * rewritten stuff, no dn-based subecj clause could
1954                  * be used at the ldap backend side (see
1955                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
1956                  * The problem can be overcome by moving the dn-based
1957                  * ACLs to the target directory server, and letting
1958                  * everything pass thru the ldap backend.
1959                  */
1960                 } else {
1961                         int     i;
1962
1963                         if ( attr->a_desc->ad_type->sat_syntax ==
1964                                 slap_schema.si_syn_distinguishedName )
1965                         {
1966                                 ldap_dnattr_result_rewrite( &dc, attr->a_vals );
1967
1968                         } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
1969                                 ldap_back_referral_result_rewrite( &dc, attr->a_vals );
1970
1971                         }
1972
1973                         for ( i = 0; i < last; i++ ) {
1974                                 struct berval   pval;
1975                                 int             rc;
1976
1977                                 if ( pretty ) {
1978                                         rc = pretty( attr->a_desc->ad_type->sat_syntax,
1979                                                 &attr->a_vals[i], &pval, NULL );
1980
1981                                 } else {
1982                                         rc = validate( attr->a_desc->ad_type->sat_syntax,
1983                                                 &attr->a_vals[i] );
1984                                 }
1985
1986                                 if ( rc ) {
1987                                         LBER_FREE( attr->a_vals[i].bv_val );
1988                                         if ( --last == i ) {
1989                                                 BER_BVZERO( &attr->a_vals[ i ] );
1990                                                 break;
1991                                         }
1992                                         attr->a_vals[i] = attr->a_vals[last];
1993                                         BER_BVZERO( &attr->a_vals[last] );
1994                                         i--;
1995                                         continue;
1996                                 }
1997
1998                                 if ( pretty ) {
1999                                         LBER_FREE( attr->a_vals[i].bv_val );
2000                                         attr->a_vals[i] = pval;
2001                                 }
2002                         }
2003
2004                         if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
2005                                 attr_free( attr );
2006                                 goto next_attr;
2007                         }
2008                 }
2009
2010                 if ( last && attr->a_desc->ad_type->sat_equality &&
2011                         attr->a_desc->ad_type->sat_equality->smr_normalize )
2012                 {
2013                         int i;
2014
2015                         attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
2016                         for ( i = 0; i<last; i++ ) {
2017                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
2018                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
2019                                         attr->a_desc->ad_type->sat_syntax,
2020                                         attr->a_desc->ad_type->sat_equality,
2021                                         &attr->a_vals[i], &attr->a_nvals[i],
2022                                         NULL );
2023                         }
2024                         BER_BVZERO( &attr->a_nvals[i] );
2025
2026                 } else {
2027                         attr->a_nvals = attr->a_vals;
2028                 }
2029
2030                 *attrp = attr;
2031                 attrp = &attr->a_next;
2032 next_attr:;
2033         }
2034
2035         /* only check if some mapping occurred */
2036         if ( check_duplicate_attrs ) {
2037                 Attribute       **ap;
2038
2039                 for ( ap = &ent.e_attrs; *ap != NULL; ap = &(*ap)->a_next ) {
2040                         Attribute       **tap;
2041
2042                         for ( tap = &(*ap)->a_next; *tap != NULL; ) {
2043                                 if ( (*tap)->a_desc == (*ap)->a_desc ) {
2044                                         Entry           e = { 0 };
2045                                         Modification    mod = { 0 };
2046                                         const char      *text = NULL;
2047                                         char            textbuf[ SLAP_TEXT_BUFLEN ];
2048                                         Attribute       *next = (*tap)->a_next;
2049
2050                                         BER_BVSTR( &e.e_name, "" );
2051                                         BER_BVSTR( &e.e_nname, "" );
2052                                         e.e_attrs = *ap;
2053                                         mod.sm_op = LDAP_MOD_ADD;
2054                                         mod.sm_desc = (*ap)->a_desc;
2055                                         mod.sm_type = mod.sm_desc->ad_cname;
2056                                         mod.sm_numvals = (*ap)->a_numvals;
2057                                         mod.sm_values = (*tap)->a_vals;
2058                                         if ( (*tap)->a_nvals != (*tap)->a_vals ) {
2059                                                 mod.sm_nvalues = (*tap)->a_nvals;
2060                                         }
2061
2062                                         (void)modify_add_values( &e, &mod,
2063                                                 /* permissive */ 1,
2064                                                 &text, textbuf, sizeof( textbuf ) );
2065
2066                                         /* should not insert new attrs! */
2067                                         assert( e.e_attrs == *ap );
2068
2069                                         attr_free( *tap );
2070                                         *tap = next;
2071
2072                                 } else {
2073                                         tap = &(*tap)->a_next;
2074                                 }
2075                         }
2076                 }
2077         }
2078
2079         ldap_get_entry_controls( mc->mc_conns[target].msc_ld,
2080                 e, &rs->sr_ctrls );
2081         rs->sr_entry = &ent;
2082         rs->sr_attrs = op->ors_attrs;
2083         rs->sr_operational_attrs = NULL;
2084         rs->sr_flags = 0;
2085         rs->sr_err = LDAP_SUCCESS;
2086         rc = send_search_entry( op, rs );
2087         switch ( rc ) {
2088         case LDAP_UNAVAILABLE:
2089                 rc = LDAP_OTHER;
2090                 break;
2091         }
2092         rs->sr_entry = NULL;
2093         rs->sr_attrs = NULL;
2094         if ( rs->sr_ctrls != NULL ) {
2095                 ldap_controls_free( rs->sr_ctrls );
2096                 rs->sr_ctrls = NULL;
2097         }
2098         if ( !BER_BVISNULL( &ent.e_name ) ) {
2099                 free( ent.e_name.bv_val );
2100                 BER_BVZERO( &ent.e_name );
2101         }
2102         if ( !BER_BVISNULL( &ent.e_nname ) ) {
2103                 free( ent.e_nname.bv_val );
2104                 BER_BVZERO( &ent.e_nname );
2105         }
2106         entry_clean( &ent );
2107
2108         return rc;
2109 }
2110