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