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 1999-2004 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 int
  45 ldap_back_search(
  46     Operation   *op,
  47     SlapReply *rs )
  48 {
  49         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  50         struct ldapconn *lc;
  51         struct timeval  tv;
  52         LDAPMessage             *res, *e;
  53         int     rc = 0, msgid;
  54         struct berval match = BER_BVNULL;
  55         char **mapped_attrs = NULL;
  56         struct berval mbase;
  57         struct berval mfilter = BER_BVNULL;
  58         int dontfreetext = 0;
  59         int freeconn = 0;
  60         int do_retry = 1;
  61         dncookie dc;
  62         LDAPControl **ctrls = NULL;
  63
  64         lc = ldap_back_getconn(op, rs);
  65         if ( !lc ) {
  66                 return( -1 );
  67         }
  68
  69         /*
  70          * FIXME: in case of values return filter, we might want
  71          * to map attrs and maybe rewrite value
  72          */
  73         if ( !ldap_back_dobind( lc, op, rs ) ) {
  74                 return( -1 );
  75         }
  76
  77         /* should we check return values? */
  78         if ( op->ors_deref != -1 ) {
  79                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref );
  80         }
  81
  82         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
  83                 tv.tv_sec = op->ors_tlimit;
  84                 tv.tv_usec = 0;
  85
  86         } else {
  87                 tv.tv_sec = 0;
  88         }
  89
  90         /*
  91          * Rewrite the search base, if required
  92          */
  93         dc.rwmap = &li->rwmap;
  94 #ifdef ENABLE_REWRITE
  95         dc.conn = op->o_conn;
  96         dc.rs = rs;
  97         dc.ctx = "searchBase";
  98 #else
  99         dc.tofrom = 1;
 100         dc.normalized = 0;
 101 #endif
 102         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 103                 send_ldap_result( op, rs );
 104                 return -1;
 105         }
 106
 107         rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
 108                         &mfilter, BACKLDAP_MAP );
 109
 110         switch ( rc ) {
 111         case LDAP_SUCCESS:
 112                 break;
 113
 114         case LDAP_COMPARE_FALSE:
 115                 rs->sr_err = LDAP_SUCCESS;
 116                 rs->sr_text = NULL;
 117                 rc = 0;
 118                 goto finish;
 119
 120         default:
 121                 rs->sr_err = LDAP_OTHER;
 122                 rs->sr_text = "Rewrite error";
 123                 dontfreetext = 1;
 124                 rc = -1;
 125                 goto finish;
 126         }
 127
 128         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 129                         op->ors_attrs,
 130                         BACKLDAP_MAP, &mapped_attrs );
 131         if ( rs->sr_err != LDAP_SUCCESS ) {
 132                 rc = -1;
 133                 goto finish;
 134         }
 135
 136         ctrls = op->o_ctrls;
 137 #ifdef LDAP_BACK_PROXY_AUTHZ
 138         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 139         if ( rc != LDAP_SUCCESS ) {
 140                 dontfreetext = 1;
 141                 goto finish;
 142         }
 143 #endif /* LDAP_BACK_PROXY_AUTHZ */
 144
 145 retry:
 146         rs->sr_err = ldap_search_ext( lc->ld, mbase.bv_val,
 147                         op->ors_scope, mfilter.bv_val,
 148                         mapped_attrs, op->ors_attrsonly,
 149                         ctrls, NULL,
 150                         tv.tv_sec ? &tv : NULL, op->ors_slimit,
 151                         &msgid );
 152
 153         if ( rs->sr_err != LDAP_SUCCESS ) {
 154 fail:;
 155                 rc = ldap_back_op_result( lc, op, rs, msgid, 0 );
 156                 if ( freeconn ) {
 157                         ldap_back_freeconn( op, lc );
 158                         lc = NULL;
 159                 }
 160                 goto finish;
 161         }
 162
 163         /* We pull apart the ber result, stuff it into a slapd entry, and
 164          * let send_search_entry stuff it back into ber format. Slow & ugly,
 165          * but this is necessary for version matching, and for ACL processing.
 166          */
 167
 168         for ( rc = 0; rc != -1; rc = ldap_result( lc->ld, msgid, 0, &tv, &res ) )
 169         {
 170                 /* check for abandon */
 171                 if ( op->o_abandon ) {
 172                         ldap_abandon( lc->ld, msgid );
 173                         rc = 0;
 174                         goto finish;
 175                 }
 176
 177                 if ( rc == 0 ) {
 178                         tv.tv_sec = 0;
 179                         tv.tv_usec = 100000;
 180                         ldap_pvt_thread_yield();
 181
 182                 } else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 183                         Entry ent = {0};
 184                         struct berval bdn;
 185                         int abort = 0;
 186                         do_retry = 0;
 187
 188                         e = ldap_first_entry( lc->ld, res );
 189                         rc = ldap_build_entry( op, e, &ent, &bdn,
 190                                         LDAP_BUILD_ENTRY_PRIVATE );
 191                        if ( rc == LDAP_SUCCESS ) {
 192                                 rs->sr_entry = &ent;
 193                                 rs->sr_attrs = op->ors_attrs;
 194                                 rs->sr_operational_attrs = NULL;
 195                                 rs->sr_flags = 0;
 196                                 abort = send_search_entry( op, rs );
 197                                 while (ent.e_attrs) {
 198                                         Attribute *a;
 199                                         BerVarray v;
 200
 201                                         a = ent.e_attrs;
 202                                         ent.e_attrs = a->a_next;
 203
 204                                         v = a->a_vals;
 205                                         if ( a->a_vals != &slap_dummy_bv ) {
 206                                                 ber_bvarray_free(a->a_vals);
 207                                         }
 208                                         if ( a->a_nvals != v ) {
 209                                                 ber_bvarray_free(a->a_nvals);
 210                                         }
 211                                         ch_free(a);
 212                                 }
 213
 214                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 215                                         free( ent.e_dn );
 216                                 if ( ent.e_ndn )
 217                                         free( ent.e_ndn );
 218                         }
 219                         ldap_msgfree( res );
 220                         if ( abort ) {
 221                                 ldap_abandon( lc->ld, msgid );
 222                                 goto finish;
 223                         }
 224
 225                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 226                         char            **references = NULL;
 227                         int             cnt;
 228
 229                         do_retry = 0;
 230                         rc = ldap_parse_reference( lc->ld, res,
 231                                         &references, &rs->sr_ctrls, 1 );
 232
 233                         if ( rc != LDAP_SUCCESS ) {
 234                                 continue;
 235                         }
 236
 237                         if ( references == NULL ) {
 238                                 continue;
 239                         }
 240
 241                         for ( cnt = 0; references[ cnt ]; cnt++ )
 242                                 /* NO OP */ ;
 243
 244                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 245
 246                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 247                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 248                         }
 249
 250                         /* ignore return value by now */
 251                         ( void )send_search_reference( op, rs );
 252
 253                         /* cleanup */
 254                         if ( references ) {
 255                                 ldap_value_free( references );
 256                                 ch_free( rs->sr_ref );
 257                                 rs->sr_ref = NULL;
 258                         }
 259
 260                         if ( rs->sr_ctrls ) {
 261                                 ldap_controls_free( rs->sr_ctrls );
 262                                 rs->sr_ctrls = NULL;
 263                         }
 264
 265                 } else {
 266                         rc = ldap_parse_result( lc->ld, res, &rs->sr_err,
 267                                         &match.bv_val, (char **)&rs->sr_text,
 268                                         NULL, &rs->sr_ctrls, 1 );
 269                         if (rc != LDAP_SUCCESS ) {
 270                                 rs->sr_err = rc;
 271                         }
 272                         rs->sr_err = slap_map_api2result( rs );
 273                         rc = 0;
 274                         break;
 275                 }
 276         }
 277
 278         if ( rc == -1 ) {
 279                 if ( do_retry ) {
 280                         do_retry = 0;
 281                         if ( ldap_back_retry( lc, op, rs ))
 282                                 goto retry;
 283                 }
 284                 /* FIXME: invalidate the connection? */
 285                 rs->sr_err = LDAP_SERVER_DOWN;
 286                 freeconn = 1;
 287                 goto fail;
 288         }
 289
 290         /*
 291          * Rewrite the matched portion of the search base, if required
 292          */
 293         if ( match.bv_val && *match.bv_val ) {
 294                 struct berval mdn;
 295
 296 #ifdef ENABLE_REWRITE
 297                 dc.ctx = "matchedDN";
 298 #else
 299                 dc.tofrom = 0;
 300                 dc.normalized = 0;
 301 #endif
 302                 match.bv_len = strlen( match.bv_val );
 303                 ldap_back_dn_massage( &dc, &match, &mdn );
 304                 rs->sr_matched = mdn.bv_val;
 305         }
 306         if ( rs->sr_v2ref ) {
 307                 rs->sr_err = LDAP_REFERRAL;
 308         }
 309
 310 finish:;
 311         send_ldap_result( op, rs );
 312
 313 #ifdef LDAP_BACK_PROXY_AUTHZ
 314         if ( ctrls && ctrls != op->o_ctrls ) {
 315                 free( ctrls[ 0 ] );
 316                 free( ctrls );
 317         }
 318 #endif /* LDAP_BACK_PROXY_AUTHZ */
 319
 320         if ( rs->sr_ctrls ) {
 321                 ldap_controls_free( rs->sr_ctrls );
 322                 rs->sr_ctrls = NULL;
 323         }
 324
 325         if ( match.bv_val ) {
 326                 if ( rs->sr_matched != match.bv_val ) {
 327                         free( (char *)rs->sr_matched );
 328                 }
 329                 rs->sr_matched = NULL;
 330                 LDAP_FREE( match.bv_val );
 331         }
 332         if ( rs->sr_text ) {
 333                 if ( !dontfreetext ) {
 334                         LDAP_FREE( (char *)rs->sr_text );
 335                 }
 336                 rs->sr_text = NULL;
 337         }
 338         if ( mapped_attrs ) {
 339                 ch_free( mapped_attrs );
 340         }
 341         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 342                 ch_free( mfilter.bv_val );
 343         }
 344         if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
 345                 free( mbase.bv_val );
 346         }
 347
 348         return rc;
 349 }
 350
 351 static int
 352 ldap_build_entry(
 353         Operation *op,
 354         LDAPMessage *e,
 355         Entry *ent,
 356         struct berval *bdn,
 357         int flags
 358 )
 359 {
 360         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 361         struct berval a, mapped;
 362         BerElement ber = *e->lm_ber;
 363         Attribute *attr, **attrp;
 364         struct berval *bv;
 365         const char *text;
 366         int last;
 367         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 368         dncookie dc;
 369
 370         /* safe assumptions ... */
 371         assert( ent );
 372         ent->e_bv.bv_val = NULL;
 373
 374         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 375                 return LDAP_DECODING_ERROR;
 376         }
 377
 378         /*
 379          * Rewrite the dn of the result, if needed
 380          */
 381         dc.rwmap = &li->rwmap;
 382 #ifdef ENABLE_REWRITE
 383         dc.conn = op->o_conn;
 384         dc.rs = NULL;
 385         dc.ctx = "searchResult";
 386 #else
 387         dc.tofrom = 0;
 388         dc.normalized = 0;
 389 #endif
 390         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 391                 return LDAP_OTHER;
 392         }
 393
 394         /*
 395          * Note: this may fail if the target host(s) schema differs
 396          * from the one known to the meta, and a DN with unknown
 397          * attributes is returned.
 398          *
 399          * FIXME: should we log anything, or delegate to dnNormalize?
 400          */
 401         /* Note: if the distinguished values or the naming attributes
 402          * change, should we massage them as well?
 403          */
 404         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 405                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 406         {
 407                 return LDAP_INVALID_DN_SYNTAX;
 408         }
 409
 410         attrp = &ent->e_attrs;
 411
 412 #ifdef ENABLE_REWRITE
 413         dc.ctx = "searchAttrDN";
 414 #endif
 415         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 416                 int                             i;
 417                 slap_syntax_validate_func       *validate;
 418                 slap_syntax_transform_func      *pretty;
 419
 420                 ldap_back_map( &li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP );
 421                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) )
 422                         continue;
 423                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 424                 if ( attr == NULL )
 425                         continue;
 426                 attr->a_flags = 0;
 427                 attr->a_next = 0;
 428                 attr->a_desc = NULL;
 429                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text ) != LDAP_SUCCESS ) {
 430                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text )
 431                                         != LDAP_SUCCESS )
 432                         {
 433                                 Debug( LDAP_DEBUG_ANY,
 434                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 435                                 ch_free( attr );
 436                                 continue;
 437                         }
 438                 }
 439
 440                 /* no subschemaSubentry */
 441                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 442
 443                         /*
 444                          * We eat target's subschemaSubentry because
 445                          * a search for this value is likely not
 446                          * to resolve to the appropriate backend;
 447                          * later, the local subschemaSubentry is
 448                          * added.
 449                          */
 450                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 451
 452                         ch_free(attr);
 453                         continue;
 454                 }
 455
 456                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 457                                 || attr->a_vals == NULL )
 458                 {
 459                         /*
 460                          * Note: attr->a_vals can be null when using
 461                          * values result filter
 462                          */
 463                         if ( private ) {
 464                                 attr->a_vals = &slap_dummy_bv;
 465                         } else {
 466                                 attr->a_vals = ch_malloc( sizeof( struct berval ) );
 467                                 BER_BVZERO( &attr->a_vals[0] );
 468                         }
 469                         last = 0;
 470
 471                 } else {
 472                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[last] ); last++ );
 473                 }
 474
 475                 if ( last == 0 ) {
 476                         /* empty */
 477                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 478                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
 479                 {
 480                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
 481                                 ldap_back_map( &li->rwmap.rwm_oc, bv, &mapped,
 482                                                 BACKLDAP_REMAP );
 483                                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 484                                         LBER_FREE( bv->bv_val );
 485                                         BER_BVZERO( bv );
 486                                         if (--last < 0)
 487                                                 break;
 488                                         *bv = attr->a_vals[last];
 489                                         BER_BVZERO( &attr->a_vals[last] );
 490                                         bv--;
 491
 492                                 } else if ( mapped.bv_val != bv->bv_val ) {
 493                                         /*
 494                                          * FIXME: after LBER_FREEing
 495                                          * the value is replaced by
 496                                          * ch_alloc'ed memory
 497                                          */
 498                                         LBER_FREE( bv->bv_val );
 499                                         ber_dupbv( bv, &mapped );
 500                                 }
 501                         }
 502
 503                 /*
 504                  * It is necessary to try to rewrite attributes with
 505                  * dn syntax because they might be used in ACLs as
 506                  * members of groups; since ACLs are applied to the
 507                  * rewritten stuff, no dn-based subject clause could
 508                  * be used at the ldap backend side (see
 509                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 510                  * The problem can be overcome by moving the dn-based
 511                  * ACLs to the target directory server, and letting
 512                  * everything pass thru the ldap backend.
 513                  */
 514                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 515                                 slap_schema.si_syn_distinguishedName )
 516                 {
 517                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 518                 }
 519
 520                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 521                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 522
 523                 if ( !validate && !pretty ) {
 524                         attr->a_nvals = NULL;
 525                         attr_free( attr );
 526                         goto next_attr;
 527                 }
 528
 529                 for ( i = 0; i < last; i++ ) {
 530                         struct berval   pval;
 531                         int             rc;
 532
 533                         if ( pretty ) {
 534                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 535                                         &attr->a_vals[i], &pval, NULL );
 536                         } else {
 537                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 538                                         &attr->a_vals[i] );
 539                         }
 540
 541                         if ( rc != LDAP_SUCCESS ) {
 542                                 attr->a_nvals = NULL;
 543                                 attr_free( attr );
 544                                 goto next_attr;
 545                         }
 546
 547                         if ( pretty ) {
 548                                 LBER_FREE( attr->a_vals[i].bv_val );
 549                                 attr->a_vals[i] = pval;
 550                         }
 551                 }
 552
 553                 if ( last && attr->a_desc->ad_type->sat_equality &&
 554                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 555                 {
 556                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 557                         for ( i = 0; i < last; i++ ) {
 558                                 int             rc;
 559
 560                                 /*
 561                                  * check that each value is valid per syntax
 562                                  * and pretty if appropriate
 563                                  */
 564                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 565                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 566                                         attr->a_desc->ad_type->sat_syntax,
 567                                         attr->a_desc->ad_type->sat_equality,
 568                                         &attr->a_vals[i], &attr->a_nvals[i],
 569                                         NULL /* op->o_tmpmemctx */ );
 570
 571                                 if ( rc != LDAP_SUCCESS ) {
 572                                         BER_BVZERO( &attr->a_nvals[i] );
 573                                         ch_free( attr );
 574                                         goto next_attr;
 575                                 }
 576                         }
 577                         BER_BVZERO( &attr->a_nvals[i] );
 578
 579                 } else {
 580                         attr->a_nvals = attr->a_vals;
 581                 }
 582                 *attrp = attr;
 583                 attrp = &attr->a_next;
 584
 585 next_attr:;
 586         }
 587
 588         /* make sure it's free'able */
 589         if ( !private && ent->e_name.bv_val == bdn->bv_val ) {
 590                 ber_dupbv( &ent->e_name, bdn );
 591         }
 592         return LDAP_SUCCESS;
 593 }
 594
 595 /* return 0 IFF we can retrieve the entry with ndn
 596  */
 597 int
 598 ldap_back_entry_get(
 599         Operation *op,
 600         struct berval   *ndn,
 601         ObjectClass *oc,
 602         AttributeDescription *at,
 603         int rw,
 604         Entry **ent
 605 )
 606 {
 607         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 608         struct ldapconn *lc;
 609         int rc = 1, is_oc;
 610         struct berval mapped = BER_BVNULL, bdn, mdn;
 611         LDAPMessage     *result = NULL, *e = NULL;
 612         char *gattr[3];
 613         char *filter = NULL;
 614         Connection *oconn;
 615         SlapReply rs;
 616         dncookie dc;
 617         int do_retry = 1;
 618
 619         /* Tell getconn this is a privileged op */
 620         is_oc = op->o_do_not_cache;
 621         op->o_do_not_cache = 1;
 622         lc = ldap_back_getconn(op, &rs);
 623         oconn = op->o_conn;
 624         op->o_conn = NULL;
 625         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 626                 op->o_do_not_cache = is_oc;
 627                 op->o_conn = oconn;
 628                 return 1;
 629         }
 630         op->o_do_not_cache = is_oc;
 631         op->o_conn = oconn;
 632
 633         /*
 634          * Rewrite the search base, if required
 635          */
 636         dc.rwmap = &li->rwmap;
 637 #ifdef ENABLE_REWRITE
 638         dc.conn = op->o_conn;
 639         dc.rs = &rs;
 640         dc.ctx = "searchBase";
 641 #else
 642         dc.tofrom = 1;
 643         dc.normalized = 1;
 644 #endif
 645         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 646                 return 1;
 647         }
 648
 649         if ( at ) {
 650                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 651                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 652                         rc = 1;
 653                         goto cleanup;
 654                 }
 655                 is_oc = ( strcasecmp( "objectclass", mapped.bv_val ) == 0 );
 656                 if ( oc && !is_oc ) {
 657                         gattr[0] = "objectclass";
 658                         gattr[1] = mapped.bv_val;
 659                         gattr[2] = NULL;
 660
 661                 } else {
 662                         gattr[0] = mapped.bv_val;
 663                         gattr[1] = NULL;
 664                 }
 665         }
 666
 667         if (oc) {
 668                 char *ptr;
 669                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 670                                                 BACKLDAP_MAP);
 671                 filter = ch_malloc( STRLENOF( "(objectclass=)" ) + mapped.bv_len + 1 );
 672                 ptr = lutil_strcopy( filter, "(objectclass=" );
 673                 ptr = lutil_strcopy( ptr, mapped.bv_val );
 674                 *ptr++ = ')';
 675                 *ptr++ = '\0';
 676         }
 677
 678 retry:
 679         rc = ldap_search_ext_s( lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 680                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 681                                 LDAP_NO_LIMIT, &result);
 682         if ( rc != LDAP_SUCCESS )
 683         {
 684                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 685                         do_retry = 0;
 686                                 if ( ldap_back_retry( lc, op, &rs ))
 687                                         goto retry;
 688                 }
 689                 goto cleanup;
 690         }
 691
 692         e = ldap_first_entry( lc->ld, result );
 693         if ( e == NULL ) {
 694                 goto cleanup;
 695         }
 696
 697         *ent = ch_calloc( 1, sizeof( Entry ) );
 698
 699         rc = ldap_build_entry( op, e, *ent, &bdn, 0 );
 700
 701         if ( rc != LDAP_SUCCESS ) {
 702                 ch_free( *ent );
 703                 *ent = NULL;
 704         }
 705
 706 cleanup:
 707         if ( result ) {
 708                 ldap_msgfree( result );
 709         }
 710
 711         if ( filter ) {
 712                 ch_free( filter );
 713         }
 714
 715         if ( mdn.bv_val != ndn->bv_val ) {
 716                 ch_free( mdn.bv_val );
 717         }
 718
 719         return rc;
 720 }
 721