git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/search.c

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2005 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn, int flags );
  42 #define LDAP_BUILD_ENTRY_PRIVATE        0x01
  43
  44 /*
  45  * Quick'n'dirty rewrite of filter in case of error, to deal with
  46  * <draft-zeilenga-ldap-t-f>.
  47  */
  48 static int
  49 munge_filter(
  50         Operation       *op,
  51         struct berval   *filter )
  52 {
  53         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  54
  55         char            *ptr;
  56         int             gotit = 0;
  57
  58         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  59                         filter->bv_val, 0, 0 );
  60
  61         for ( ptr = strstr( filter->bv_val, "(?=" );
  62                         ptr;
  63                         ptr = strstr( ptr, "(?=" ) )
  64         {
  65                 static struct berval
  66                         bv_true = BER_BVC( "(?=true)" ),
  67                         bv_false = BER_BVC( "(?=false)" ),
  68                         bv_t = BER_BVC( "(&)" ),
  69                         bv_f = BER_BVC( "(|)" ),
  70                         bv_T = BER_BVC( "(objectClass=*)" ),
  71                         bv_F = BER_BVC( "(!(objectClass=*))" );
  72                 struct berval   *oldbv = NULL,
  73                                 *newbv = NULL,
  74                                 oldfilter = BER_BVNULL;
  75
  76                 if ( strncmp( ptr, bv_true.bv_val, bv_true.bv_len ) == 0 ) {
  77                         oldbv = &bv_true;
  78                         if ( li->flags & LDAP_BACK_F_SUPPORT_T_F ) {
  79                                 newbv = &bv_t;
  80
  81                         } else {
  82                                 newbv = &bv_T;
  83                         }
  84
  85                 } else if ( strncmp( ptr, bv_false.bv_val, bv_false.bv_len ) == 0 )
  86                 {
  87                         oldbv = &bv_false;
  88                         if ( li->flags & LDAP_BACK_F_SUPPORT_T_F ) {
  89                                 newbv = &bv_f;
  90
  91                         } else {
  92                                 newbv = &bv_F;
  93                         }
  94
  95                 } else {
  96                         gotit = 0;
  97                         goto done;
  98                 }
  99
 100                 oldfilter = *filter;
 101                 if ( !( li->flags & LDAP_BACK_F_SUPPORT_T_F ) ) {
 102                         filter->bv_len += newbv->bv_len - oldbv->bv_len;
 103                         if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 104                                 filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 105                                                 op->o_tmpmemctx );
 106
 107                                 AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 108                                                 op->ors_filterstr.bv_len + 1 );
 109
 110                         } else {
 111                                 filter->bv_val = op->o_tmprealloc( filter->bv_val,
 112                                                 filter->bv_len + 1, op->o_tmpmemctx );
 113                         }
 114
 115                         ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 116                 }
 117
 118                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 119                                 &ptr[ oldbv->bv_len ],
 120                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 121                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 122
 123                 ptr += newbv->bv_len;
 124                 gotit = 1;
 125         }
 126
 127 done:;
 128         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 129                         filter->bv_val, gotit, 0 );
 130
 131         return gotit;
 132 }
 133
 134 int
 135 ldap_back_search(
 136                 Operation       *op,
 137                 SlapReply       *rs )
 138 {
 139         struct ldapconn *lc;
 140         struct timeval  tv;
 141         LDAPMessage     *res,
 142                         *e;
 143         int             rc = 0,
 144                         msgid;
 145         struct berval   match = BER_BVNULL,
 146                         filter = BER_BVNULL;
 147         int             i;
 148         char            **attrs = NULL;
 149         int             dontfreetext = 0;
 150         int             do_retry = 1;
 151         LDAPControl     **ctrls = NULL;
 152
 153         lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
 154         if ( !lc ) {
 155                 return rs->sr_err;
 156         }
 157
 158         /*
 159          * FIXME: in case of values return filter, we might want
 160          * to map attrs and maybe rewrite value
 161          */
 162         if ( !ldap_back_dobind( lc, op, rs, LDAP_BACK_SENDERR ) ) {
 163                 return rs->sr_err;
 164         }
 165
 166         /* should we check return values? */
 167         if ( op->ors_deref != -1 ) {
 168                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 169                                 (void *)&op->ors_deref );
 170         }
 171
 172         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 173                 tv.tv_sec = op->ors_tlimit;
 174                 tv.tv_usec = 0;
 175
 176         } else {
 177                 tv.tv_sec = 0;
 178         }
 179
 180         if ( op->ors_attrs ) {
 181                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 182                         /* just count attrs */ ;
 183
 184                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 185                 if ( attrs == NULL ) {
 186                         rs->sr_err = LDAP_NO_MEMORY;
 187                         rc = -1;
 188                         goto finish;
 189                 }
 190
 191                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 192                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 193                 }
 194                 attrs[ i ] = NULL;
 195         }
 196
 197         ctrls = op->o_ctrls;
 198         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 199         if ( rc != LDAP_SUCCESS ) {
 200                 dontfreetext = 1;
 201                 goto finish;
 202         }
 203
 204         /* deal with <draft-zeilenga-ldap-t-f> filters */
 205         filter = op->ors_filterstr;
 206 retry:
 207         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_ndn.bv_val,
 208                         op->ors_scope, filter.bv_val,
 209                         attrs, op->ors_attrsonly, ctrls, NULL,
 210                         tv.tv_sec ? &tv : NULL,
 211                         op->ors_slimit, &msgid );
 212
 213         if ( rs->sr_err != LDAP_SUCCESS ) {
 214 fail:;
 215                 switch ( rs->sr_err ) {
 216                 case LDAP_SERVER_DOWN:
 217                         if ( do_retry ) {
 218                                 do_retry = 0;
 219                                 if ( ldap_back_retry( lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 220                                         goto retry;
 221                                 }
 222                         }
 223                         rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 224                         ldap_back_freeconn( op, lc );
 225                         lc = NULL;
 226                         goto finish;
 227
 228                 case LDAP_FILTER_ERROR:
 229                         if ( munge_filter( op, &filter ) ) {
 230                                 goto retry;
 231                         }
 232
 233                         /* invalid filters return success with no data */
 234                         rs->sr_err = LDAP_SUCCESS;
 235                         rs->sr_text = NULL;
 236                         goto finish;
 237
 238                 default:
 239                         rs->sr_err = slap_map_api2result( rs );
 240                         rs->sr_text = NULL;
 241                         goto finish;
 242                 }
 243         }
 244
 245         /* We pull apart the ber result, stuff it into a slapd entry, and
 246          * let send_search_entry stuff it back into ber format. Slow & ugly,
 247          * but this is necessary for version matching, and for ACL processing.
 248          */
 249
 250         for ( rc = 0; rc != -1; rc = ldap_result( lc->lc_ld, msgid, 0, &tv, &res ) )
 251         {
 252                 /* check for abandon */
 253                 if ( op->o_abandon ) {
 254                         ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
 255                         rc = SLAPD_ABANDON;
 256                         goto finish;
 257                 }
 258
 259                 if ( rc == 0 ) {
 260                         tv.tv_sec = 0;
 261                         tv.tv_usec = 100000;
 262                         ldap_pvt_thread_yield();
 263
 264                 } else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 265                         Entry           ent = {0};
 266                         struct berval   bdn;
 267                         int             abort = 0;
 268
 269                         do_retry = 0;
 270
 271                         e = ldap_first_entry( lc->lc_ld, res );
 272                         rc = ldap_build_entry( op, e, &ent, &bdn,
 273                                         LDAP_BUILD_ENTRY_PRIVATE );
 274                        if ( rc == LDAP_SUCCESS ) {
 275                                 rs->sr_entry = &ent;
 276                                 rs->sr_attrs = op->ors_attrs;
 277                                 rs->sr_operational_attrs = NULL;
 278                                 rs->sr_flags = 0;
 279                                 abort = send_search_entry( op, rs );
 280                                 while ( ent.e_attrs ) {
 281                                         Attribute       *a;
 282
 283                                         a = ent.e_attrs;
 284                                         ent.e_attrs = a->a_next;
 285
 286                                         if ( a->a_nvals != a->a_vals ) {
 287                                                 ber_bvarray_free( a->a_nvals );
 288                                         }
 289                                         if ( a->a_vals != &slap_dummy_bv ) {
 290                                                 ber_bvarray_free( a->a_vals );
 291                                         }
 292                                         ch_free( a );
 293                                 }
 294
 295                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) ) {
 296                                         free( ent.e_dn );
 297                                 }
 298                                 if ( ent.e_ndn ) {
 299                                         free( ent.e_ndn );
 300                                 }
 301                         }
 302                         ldap_msgfree( res );
 303                         if ( abort ) {
 304                                 ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
 305                                 goto finish;
 306                         }
 307
 308                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 309                         char            **references = NULL;
 310                         int             cnt;
 311
 312                         do_retry = 0;
 313                         rc = ldap_parse_reference( lc->lc_ld, res,
 314                                         &references, &rs->sr_ctrls, 1 );
 315
 316                         if ( rc != LDAP_SUCCESS ) {
 317                                 continue;
 318                         }
 319
 320                         if ( references == NULL ) {
 321                                 continue;
 322                         }
 323
 324                         for ( cnt = 0; references[ cnt ]; cnt++ )
 325                                 /* NO OP */ ;
 326
 327                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 328
 329                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 330                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 331                         }
 332
 333                         /* ignore return value by now */
 334                         ( void )send_search_reference( op, rs );
 335
 336                         /* cleanup */
 337                         if ( references ) {
 338                                 ldap_value_free( references );
 339                                 ch_free( rs->sr_ref );
 340                                 rs->sr_ref = NULL;
 341                         }
 342
 343                         if ( rs->sr_ctrls ) {
 344                                 ldap_controls_free( rs->sr_ctrls );
 345                                 rs->sr_ctrls = NULL;
 346                         }
 347
 348                 } else {
 349                         char            **references = NULL;
 350
 351                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 352                                         &match.bv_val, (char **)&rs->sr_text,
 353                                         &references, &rs->sr_ctrls, 1 );
 354                         if ( rc != LDAP_SUCCESS ) {
 355                                 rs->sr_err = rc;
 356                         }
 357                         rs->sr_err = slap_map_api2result( rs );
 358
 359                         if ( references ) {
 360                                 int     cnt;
 361
 362                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 363                                         /* NO OP */ ;
 364
 365                                 rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 366
 367                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 368                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 369                                 }
 370
 371                                 /* cleanup */
 372                                 if ( references ) {
 373                                         ldap_value_free( references );
 374                                 }
 375                         }
 376
 377                         rc = 0;
 378                         break;
 379                 }
 380         }
 381
 382         if ( rc == -1 ) {
 383                 if ( do_retry ) {
 384                         do_retry = 0;
 385                         if ( ldap_back_retry( lc, op, rs, LDAP_BACK_SENDERR ) ) {
 386                                 goto retry;
 387                         }
 388                 }
 389                 rs->sr_err = LDAP_SERVER_DOWN;
 390                 goto fail;
 391         }
 392
 393         /*
 394          * Rewrite the matched portion of the search base, if required
 395          */
 396         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 397                 rs->sr_matched = match.bv_val;
 398         }
 399         if ( rs->sr_v2ref ) {
 400                 rs->sr_err = LDAP_REFERRAL;
 401         }
 402
 403 finish:;
 404         if ( rc != SLAPD_ABANDON ) {
 405                 send_ldap_result( op, rs );
 406         }
 407
 408         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 409
 410         if ( rs->sr_ctrls ) {
 411                 ldap_controls_free( rs->sr_ctrls );
 412                 rs->sr_ctrls = NULL;
 413         }
 414
 415         if ( match.bv_val ) {
 416                 rs->sr_matched = NULL;
 417                 LDAP_FREE( match.bv_val );
 418         }
 419
 420         if ( !BER_BVISNULL( &filter ) && filter.bv_val != op->ors_filterstr.bv_val ) {
 421                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 422         }
 423
 424         if ( rs->sr_text ) {
 425                 if ( !dontfreetext ) {
 426                         LDAP_FREE( (char *)rs->sr_text );
 427                 }
 428                 rs->sr_text = NULL;
 429         }
 430
 431         if ( rs->sr_ref ) {
 432                 ber_bvarray_free( rs->sr_ref );
 433                 rs->sr_ref = NULL;
 434         }
 435
 436         if ( attrs ) {
 437                 ch_free( attrs );
 438         }
 439
 440         return rc;
 441 }
 442
 443 static int
 444 ldap_build_entry(
 445                 Operation       *op,
 446                 LDAPMessage     *e,
 447                 Entry           *ent,
 448                 struct berval   *bdn,
 449                 int             flags )
 450 {
 451         struct berval   a;
 452         BerElement      ber = *e->lm_ber;
 453         Attribute       *attr, **attrp;
 454         const char      *text;
 455         int             last;
 456         int             private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 457
 458         /* safe assumptions ... */
 459         assert( ent );
 460         BER_BVZERO( &ent->e_bv );
 461
 462         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 463                 return LDAP_DECODING_ERROR;
 464         }
 465
 466         /*
 467          * Note: this may fail if the target host(s) schema differs
 468          * from the one known to the meta, and a DN with unknown
 469          * attributes is returned.
 470          *
 471          * FIXME: should we log anything, or delegate to dnNormalize?
 472          */
 473         /* Note: if the distinguished values or the naming attributes
 474          * change, should we massage them as well?
 475          */
 476         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 477                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 478         {
 479                 return LDAP_INVALID_DN_SYNTAX;
 480         }
 481
 482         attrp = &ent->e_attrs;
 483
 484         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 485                 int                             i;
 486                 slap_syntax_validate_func       *validate;
 487                 slap_syntax_transform_func      *pretty;
 488
 489                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 490                 if ( attr == NULL ) {
 491                         continue;
 492                 }
 493                 attr->a_flags = 0;
 494                 attr->a_next = 0;
 495                 attr->a_desc = NULL;
 496                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 497                                 != LDAP_SUCCESS )
 498                 {
 499                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text )
 500                                         != LDAP_SUCCESS )
 501                         {
 502                                 Debug( LDAP_DEBUG_ANY,
 503                                         "slap_bv2undef_ad(%s):  %s\n",
 504                                         a.bv_val, text, 0 );
 505                                 ch_free( attr );
 506                                 continue;
 507                         }
 508                 }
 509
 510                 /* no subschemaSubentry */
 511                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 512
 513                         /*
 514                          * We eat target's subschemaSubentry because
 515                          * a search for this value is likely not
 516                          * to resolve to the appropriate backend;
 517                          * later, the local subschemaSubentry is
 518                          * added.
 519                          */
 520                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 521
 522                         ch_free( attr );
 523                         continue;
 524                 }
 525
 526                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 527                                 || attr->a_vals == NULL )
 528                 {
 529                         /*
 530                          * Note: attr->a_vals can be null when using
 531                          * values result filter
 532                          */
 533                         if ( private ) {
 534                                 attr->a_vals = (struct berval *)&slap_dummy_bv;
 535
 536                         } else {
 537                                 attr->a_vals = ch_malloc( sizeof( struct berval ) );
 538                                 BER_BVZERO( &attr->a_vals[ 0 ] );
 539                         }
 540                         last = 0;
 541
 542                 } else {
 543                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 544                                 /* just count vals */ ;
 545                 }
 546
 547                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 548                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 549
 550                 if ( !validate && !pretty ) {
 551                         attr->a_nvals = NULL;
 552                         attr_free( attr );
 553                         goto next_attr;
 554                 }
 555
 556                 for ( i = 0; i < last; i++ ) {
 557                         struct berval   pval;
 558                         int             rc;
 559
 560                         if ( pretty ) {
 561                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 562                                         &attr->a_vals[i], &pval, NULL );
 563
 564                         } else {
 565                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 566                                         &attr->a_vals[i] );
 567                         }
 568
 569                         if ( rc != LDAP_SUCCESS ) {
 570                                 /* check if, by chance, it's an undefined objectClass */
 571                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 572                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 573                                 {
 574                                         ber_dupbv( &pval, &attr->a_vals[i] );
 575
 576                                 } else {
 577                                         attr->a_nvals = NULL;
 578                                         attr_free( attr );
 579                                         goto next_attr;
 580                                 }
 581                         }
 582
 583                         if ( pretty ) {
 584                                 LBER_FREE( attr->a_vals[i].bv_val );
 585                                 attr->a_vals[i] = pval;
 586                         }
 587                 }
 588
 589                 if ( last && attr->a_desc->ad_type->sat_equality &&
 590                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 591                 {
 592                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 593                         for ( i = 0; i < last; i++ ) {
 594                                 int             rc;
 595
 596                                 /*
 597                                  * check that each value is valid per syntax
 598                                  * and pretty if appropriate
 599                                  */
 600                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 601                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 602                                         attr->a_desc->ad_type->sat_syntax,
 603                                         attr->a_desc->ad_type->sat_equality,
 604                                         &attr->a_vals[i], &attr->a_nvals[i],
 605                                         NULL );
 606
 607                                 if ( rc != LDAP_SUCCESS ) {
 608                                         BER_BVZERO( &attr->a_nvals[i] );
 609                                         ch_free( attr );
 610                                         goto next_attr;
 611                                 }
 612                         }
 613                         BER_BVZERO( &attr->a_nvals[i] );
 614
 615                 } else {
 616                         attr->a_nvals = attr->a_vals;
 617                 }
 618                 *attrp = attr;
 619                 attrp = &attr->a_next;
 620
 621 next_attr:;
 622         }
 623
 624         return LDAP_SUCCESS;
 625 }
 626
 627 /* return 0 IFF we can retrieve the entry with ndn
 628  */
 629 int
 630 ldap_back_entry_get(
 631                 Operation               *op,
 632                 struct berval           *ndn,
 633                 ObjectClass             *oc,
 634                 AttributeDescription    *at,
 635                 int                     rw,
 636                 Entry                   **ent
 637 )
 638 {
 639         struct ldapconn *lc;
 640         int             rc = 1,
 641                         do_not_cache;
 642         struct berval   bdn;
 643         LDAPMessage     *result = NULL,
 644                         *e = NULL;
 645         char            *gattr[3];
 646         char            *filter = NULL;
 647         SlapReply       rs;
 648         int             do_retry = 1;
 649         LDAPControl     **ctrls = NULL;
 650
 651         /* Tell getconn this is a privileged op */
 652         do_not_cache = op->o_do_not_cache;
 653         op->o_do_not_cache = 1;
 654         lc = ldap_back_getconn( op, &rs, LDAP_BACK_DONTSEND );
 655         if ( !lc || !ldap_back_dobind( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 656                 op->o_do_not_cache = do_not_cache;
 657                 return rs.sr_err;
 658         }
 659         op->o_do_not_cache = do_not_cache;
 660
 661         if ( at ) {
 662                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 663                         gattr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 664                         gattr[1] = at->ad_cname.bv_val;
 665                         gattr[2] = NULL;
 666
 667                 } else {
 668                         gattr[0] = at->ad_cname.bv_val;
 669                         gattr[1] = NULL;
 670                 }
 671         }
 672
 673         if ( oc ) {
 674                 char    *ptr;
 675
 676                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 677                                 + oc->soc_cname.bv_len + 1 );
 678                 ptr = lutil_strcopy( filter, "(objectclass=" );
 679                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 680                 *ptr++ = ')';
 681                 *ptr++ = '\0';
 682         }
 683
 684         ctrls = op->o_ctrls;
 685         rc = ldap_back_proxy_authz_ctrl( lc, op, &rs, &ctrls );
 686         if ( rc != LDAP_SUCCESS ) {
 687                 goto cleanup;
 688         }
 689
 690 retry:
 691         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 692                                 at ? gattr : NULL, 0, ctrls, NULL,
 693                                 LDAP_NO_LIMIT, LDAP_NO_LIMIT, &result );
 694         if ( rc != LDAP_SUCCESS ) {
 695                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 696                         do_retry = 0;
 697                         if ( ldap_back_retry( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 698                                 goto retry;
 699                         }
 700                 }
 701                 goto cleanup;
 702         }
 703
 704         e = ldap_first_entry( lc->lc_ld, result );
 705         if ( e == NULL ) {
 706                 goto cleanup;
 707         }
 708
 709         *ent = ch_calloc( 1, sizeof( Entry ) );
 710
 711         rc = ldap_build_entry( op, e, *ent, &bdn, 0 );
 712
 713         if ( rc != LDAP_SUCCESS ) {
 714                 ch_free( *ent );
 715                 *ent = NULL;
 716         }
 717
 718 cleanup:
 719         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 720
 721         if ( result ) {
 722                 ldap_msgfree( result );
 723         }
 724
 725         if ( filter ) {
 726                 ch_free( filter );
 727         }
 728
 729         return rc;
 730 }
 731