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 static struct berval dummy = BER_BVNULL;
  45
  46 int
  47 ldap_back_search(
  48     Operation   *op,
  49     SlapReply *rs )
  50 {
  51         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  52         struct ldapconn *lc;
  53         struct timeval  tv;
  54         LDAPMessage             *res, *e;
  55         int     rc = 0, msgid;
  56         struct berval match = BER_BVNULL;
  57         char **mapped_attrs = NULL;
  58         struct berval mbase;
  59         struct berval mfilter = BER_BVNULL;
  60         int dontfreetext = 0;
  61         int freeconn = 0;
  62         dncookie dc;
  63         LDAPControl **ctrls = NULL;
  64
  65         lc = ldap_back_getconn(op, rs);
  66         if ( !lc ) {
  67                 return( -1 );
  68         }
  69
  70         /*
  71          * FIXME: in case of values return filter, we might want
  72          * to map attrs and maybe rewrite value
  73          */
  74         if ( !ldap_back_dobind( lc, op, rs ) ) {
  75                 return( -1 );
  76         }
  77
  78         /* should we check return values? */
  79         if ( op->ors_deref != -1 ) {
  80                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref );
  81         }
  82
  83         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
  84                 tv.tv_sec = op->ors_tlimit;
  85                 tv.tv_usec = 0;
  86
  87         } else {
  88                 tv.tv_sec = 0;
  89         }
  90
  91         /*
  92          * Rewrite the search base, if required
  93          */
  94         dc.rwmap = &li->rwmap;
  95 #ifdef ENABLE_REWRITE
  96         dc.conn = op->o_conn;
  97         dc.rs = rs;
  98         dc.ctx = "searchBase";
  99 #else
 100         dc.tofrom = 1;
 101         dc.normalized = 0;
 102 #endif
 103         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 104                 send_ldap_result( op, rs );
 105                 return -1;
 106         }
 107
 108         rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
 109                         &mfilter, BACKLDAP_MAP );
 110
 111         switch ( rc ) {
 112         case LDAP_SUCCESS:
 113                 break;
 114
 115         case LDAP_COMPARE_FALSE:
 116                 rs->sr_err = LDAP_SUCCESS;
 117                 rs->sr_text = NULL;
 118                 rc = 0;
 119                 goto finish;
 120
 121         default:
 122                 rs->sr_err = LDAP_OTHER;
 123                 rs->sr_text = "Rewrite error";
 124                 dontfreetext = 1;
 125                 rc = -1;
 126                 goto finish;
 127         }
 128
 129         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 130                         op->ors_attrs,
 131                         BACKLDAP_MAP, &mapped_attrs );
 132         if ( rs->sr_err != LDAP_SUCCESS ) {
 133                 rc = -1;
 134                 goto finish;
 135         }
 136
 137         ctrls = op->o_ctrls;
 138 #ifdef LDAP_BACK_PROXY_AUTHZ
 139         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 140         if ( rc != LDAP_SUCCESS ) {
 141                 dontfreetext = 1;
 142                 goto finish;
 143         }
 144 #endif /* LDAP_BACK_PROXY_AUTHZ */
 145
 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                         e = ldap_first_entry( lc->ld, res );
 187                         rc = ldap_build_entry( op, e, &ent, &bdn,
 188                                         LDAP_BUILD_ENTRY_PRIVATE );
 189                        if ( rc == LDAP_SUCCESS ) {
 190                                 rs->sr_entry = &ent;
 191                                 rs->sr_attrs = op->ors_attrs;
 192                                 rs->sr_flags = 0;
 193                                 abort = send_search_entry( op, rs );
 194                                 while (ent.e_attrs) {
 195                                         Attribute *a;
 196                                         BerVarray v;
 197
 198                                         a = ent.e_attrs;
 199                                         ent.e_attrs = a->a_next;
 200
 201                                         v = a->a_vals;
 202                                         if ( a->a_vals != &dummy ) {
 203                                                 ber_bvarray_free(a->a_vals);
 204                                         }
 205                                         if ( a->a_nvals != v ) {
 206                                                 ber_bvarray_free(a->a_nvals);
 207                                         }
 208                                         ch_free(a);
 209                                 }
 210
 211                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 212                                         free( ent.e_dn );
 213                                 if ( ent.e_ndn )
 214                                         free( ent.e_ndn );
 215                         }
 216                         ldap_msgfree( res );
 217                         if ( abort ) {
 218                                 ldap_abandon( lc->ld, msgid );
 219                                 goto finish;
 220                         }
 221
 222                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 223                         char            **references = NULL;
 224                         int             cnt;
 225
 226                         rc = ldap_parse_reference( lc->ld, res,
 227                                         &references, &rs->sr_ctrls, 1 );
 228
 229                         if ( rc != LDAP_SUCCESS ) {
 230                                 continue;
 231                         }
 232
 233                         if ( references == NULL ) {
 234                                 continue;
 235                         }
 236
 237                         for ( cnt = 0; references[ cnt ]; cnt++ )
 238                                 /* NO OP */ ;
 239
 240                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 241
 242                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 243                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 244                         }
 245
 246                         /* ignore return value by now */
 247                         ( void )send_search_reference( op, rs );
 248
 249                         /* cleanup */
 250                         if ( references ) {
 251                                 ldap_value_free( references );
 252                                 ch_free( rs->sr_ref );
 253                                 rs->sr_ref = NULL;
 254                         }
 255
 256                         if ( rs->sr_ctrls ) {
 257                                 ldap_controls_free( rs->sr_ctrls );
 258                                 rs->sr_ctrls = NULL;
 259                         }
 260
 261                 } else {
 262                         rc = ldap_parse_result( lc->ld, res, &rs->sr_err,
 263                                         &match.bv_val, (char **)&rs->sr_text,
 264                                         NULL, NULL, 1 );
 265                         if (rc != LDAP_SUCCESS ) {
 266                                 rs->sr_err = rc;
 267                         }
 268                         rs->sr_err = slap_map_api2result( rs );
 269                         rc = 0;
 270                         break;
 271                 }
 272         }
 273
 274         if ( rc == -1 ) {
 275                 /* FIXME: invalidate the connection? */
 276                 rs->sr_err = LDAP_SERVER_DOWN;
 277                 freeconn = 1;
 278                 goto fail;
 279         }
 280
 281         /*
 282          * Rewrite the matched portion of the search base, if required
 283          */
 284         if ( match.bv_val && *match.bv_val ) {
 285                 struct berval mdn;
 286
 287 #ifdef ENABLE_REWRITE
 288                 dc.ctx = "matchedDN";
 289 #else
 290                 dc.tofrom = 0;
 291                 dc.normalized = 0;
 292 #endif
 293                 match.bv_len = strlen( match.bv_val );
 294                 ldap_back_dn_massage( &dc, &match, &mdn );
 295                 rs->sr_matched = mdn.bv_val;
 296         }
 297         if ( rs->sr_v2ref ) {
 298                 rs->sr_err = LDAP_REFERRAL;
 299         }
 300
 301 finish:;
 302         send_ldap_result( op, rs );
 303
 304 #ifdef LDAP_BACK_PROXY_AUTHZ
 305         if ( ctrls && ctrls != op->o_ctrls ) {
 306                 free( ctrls[ 0 ] );
 307                 free( ctrls );
 308         }
 309 #endif /* LDAP_BACK_PROXY_AUTHZ */
 310
 311         if ( match.bv_val ) {
 312                 if ( rs->sr_matched != match.bv_val ) {
 313                         free( (char *)rs->sr_matched );
 314                 }
 315                 rs->sr_matched = NULL;
 316                 LDAP_FREE( match.bv_val );
 317         }
 318         if ( rs->sr_text ) {
 319                 if ( !dontfreetext ) {
 320                         LDAP_FREE( (char *)rs->sr_text );
 321                 }
 322                 rs->sr_text = NULL;
 323         }
 324         if ( mapped_attrs ) {
 325                 ch_free( mapped_attrs );
 326         }
 327         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 328                 ch_free( mfilter.bv_val );
 329         }
 330         if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
 331                 free( mbase.bv_val );
 332         }
 333
 334         return rc;
 335 }
 336
 337 static int
 338 ldap_build_entry(
 339         Operation *op,
 340         LDAPMessage *e,
 341         Entry *ent,
 342         struct berval *bdn,
 343         int flags
 344 )
 345 {
 346         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 347         struct berval a, mapped;
 348         BerElement ber = *e->lm_ber;
 349         Attribute *attr, **attrp;
 350         struct berval *bv;
 351         const char *text;
 352         int last;
 353         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 354         dncookie dc;
 355
 356         /* safe assumptions ... */
 357         assert( ent );
 358         ent->e_bv.bv_val = NULL;
 359
 360         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 361                 return LDAP_DECODING_ERROR;
 362         }
 363
 364         /*
 365          * Rewrite the dn of the result, if needed
 366          */
 367         dc.rwmap = &li->rwmap;
 368 #ifdef ENABLE_REWRITE
 369         dc.conn = op->o_conn;
 370         dc.rs = NULL;
 371         dc.ctx = "searchResult";
 372 #else
 373         dc.tofrom = 0;
 374         dc.normalized = 0;
 375 #endif
 376         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 377                 return LDAP_OTHER;
 378         }
 379
 380         /*
 381          * Note: this may fail if the target host(s) schema differs
 382          * from the one known to the meta, and a DN with unknown
 383          * attributes is returned.
 384          *
 385          * FIXME: should we log anything, or delegate to dnNormalize?
 386          */
 387         /* Note: if the distinguished values or the naming attributes
 388          * change, should we massage them as well?
 389          */
 390         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 391                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 392         {
 393                 return LDAP_INVALID_DN_SYNTAX;
 394         }
 395
 396         attrp = &ent->e_attrs;
 397
 398 #ifdef ENABLE_REWRITE
 399         dc.ctx = "searchAttrDN";
 400 #endif
 401         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 402                 int             i;
 403                 slap_syntax_validate_func *validate =
 404                         attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 405                 slap_syntax_transform_func *pretty =
 406                         attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 407
 408                 ldap_back_map( &li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP );
 409                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) )
 410                         continue;
 411                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 412                 if ( attr == NULL )
 413                         continue;
 414                 attr->a_flags = 0;
 415                 attr->a_next = 0;
 416                 attr->a_desc = NULL;
 417                 if ( slap_bv2ad( &mapped, &attr->a_desc, &text ) != LDAP_SUCCESS ) {
 418                         if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text )
 419                                         != LDAP_SUCCESS )
 420                         {
 421 #ifdef NEW_LOGGING
 422                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 423                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 424 #else /* !NEW_LOGGING */
 425                                 Debug( LDAP_DEBUG_ANY,
 426                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 427 #endif /* !NEW_LOGGING */
 428                                 ch_free( attr );
 429                                 continue;
 430                         }
 431                 }
 432
 433                 /* no subschemaSubentry */
 434                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 435
 436                         /*
 437                          * We eat target's subschemaSubentry because
 438                          * a search for this value is likely not
 439                          * to resolve to the appropriate backend;
 440                          * later, the local subschemaSubentry is
 441                          * added.
 442                          */
 443                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 444
 445                         ch_free(attr);
 446                         continue;
 447                 }
 448
 449                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 450                                 || attr->a_vals == NULL )
 451                 {
 452                         /*
 453                          * Note: attr->a_vals can be null when using
 454                          * values result filter
 455                          */
 456                         if ( private ) {
 457                                 attr->a_vals = &dummy;
 458                         } else {
 459                                 attr->a_vals = ch_malloc( sizeof( struct berval ) );
 460                                 BER_BVZERO( &attr->a_vals[0] );
 461                         }
 462                         last = 0;
 463
 464                 } else {
 465                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[last] ); last++ );
 466                 }
 467
 468                 if ( last == 0 ) {
 469                         /* empty */
 470                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 471                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
 472                 {
 473                         for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
 474                                 ldap_back_map( &li->rwmap.rwm_oc, bv, &mapped,
 475                                                 BACKLDAP_REMAP );
 476                                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 477                                         LBER_FREE( bv->bv_val );
 478                                         BER_BVZERO( bv );
 479                                         if (--last < 0)
 480                                                 break;
 481                                         *bv = attr->a_vals[last];
 482                                         BER_BVZERO( &attr->a_vals[last] );
 483                                         bv--;
 484
 485                                 } else if ( mapped.bv_val != bv->bv_val ) {
 486                                         /*
 487                                          * FIXME: after LBER_FREEing
 488                                          * the value is replaced by
 489                                          * ch_alloc'ed memory
 490                                          */
 491                                         LBER_FREE( bv->bv_val );
 492                                         ber_dupbv( bv, &mapped );
 493                                 }
 494                         }
 495
 496                 /*
 497                  * It is necessary to try to rewrite attributes with
 498                  * dn syntax because they might be used in ACLs as
 499                  * members of groups; since ACLs are applied to the
 500                  * rewritten stuff, no dn-based subject clause could
 501                  * be used at the ldap backend side (see
 502                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 503                  * The problem can be overcome by moving the dn-based
 504                  * ACLs to the target directory server, and letting
 505                  * everything pass thru the ldap backend.
 506                  */
 507                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 508                                 slap_schema.si_syn_distinguishedName )
 509                 {
 510                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 511                 }
 512
 513                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 514                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 515
 516                 if ( !validate && !pretty ) {
 517                         attr->a_nvals = NULL;
 518                         attr_free( attr );
 519                         goto next_attr;
 520                 }
 521
 522                 for ( i = 0; i < last; i++ ) {
 523                         struct berval   pval;
 524                         int             rc;
 525
 526                         if ( pretty ) {
 527                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 528                                         &attr->a_vals[i], &pval, NULL );
 529                         } else {
 530                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 531                                         &attr->a_vals[i] );
 532                         }
 533
 534                         if ( rc != LDAP_SUCCESS ) {
 535                                 attr->a_nvals = NULL;
 536                                 attr_free( attr );
 537                                 goto next_attr;
 538                         }
 539
 540                         if ( pretty ) {
 541                                 LBER_FREE( attr->a_vals[i].bv_val );
 542                                 attr->a_vals[i] = pval;
 543                         }
 544                 }
 545
 546                 if ( last && attr->a_desc->ad_type->sat_equality &&
 547                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 548                 {
 549                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 550                         for ( i = 0; i < last; i++ ) {
 551                                 int             rc;
 552
 553                                 /*
 554                                  * check that each value is valid per syntax
 555                                  * and pretty if appropriate
 556                                  */
 557                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 558                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 559                                         attr->a_desc->ad_type->sat_syntax,
 560                                         attr->a_desc->ad_type->sat_equality,
 561                                         &attr->a_vals[i], &attr->a_nvals[i],
 562                                         NULL /* op->o_tmpmemctx */ );
 563
 564                                 if ( rc != LDAP_SUCCESS ) {
 565                                         BER_BVZERO( &attr->a_nvals[i] );
 566                                         ch_free( attr );
 567                                         goto next_attr;
 568                                 }
 569                         }
 570                         BER_BVZERO( &attr->a_nvals[i] );
 571
 572                 } else {
 573                         attr->a_nvals = attr->a_vals;
 574                 }
 575                 *attrp = attr;
 576                 attrp = &attr->a_next;
 577
 578 next_attr:;
 579         }
 580
 581         /* make sure it's free'able */
 582         if ( !private && ent->e_name.bv_val == bdn->bv_val ) {
 583                 ber_dupbv( &ent->e_name, bdn );
 584         }
 585         return LDAP_SUCCESS;
 586 }
 587
 588 /* return 0 IFF we can retrieve the entry with ndn
 589  */
 590 int
 591 ldap_back_entry_get(
 592         Operation *op,
 593         struct berval   *ndn,
 594         ObjectClass *oc,
 595         AttributeDescription *at,
 596         int rw,
 597         Entry **ent
 598 )
 599 {
 600         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 601         struct ldapconn *lc;
 602         int rc = 1, is_oc;
 603         struct berval mapped = BER_BVNULL, bdn, mdn;
 604         LDAPMessage     *result = NULL, *e = NULL;
 605         char *gattr[3];
 606         char *filter = NULL;
 607         Connection *oconn;
 608         SlapReply rs;
 609         dncookie dc;
 610
 611         /* Tell getconn this is a privileged op */
 612         is_oc = op->o_do_not_cache;
 613         op->o_do_not_cache = 1;
 614         lc = ldap_back_getconn(op, &rs);
 615         oconn = op->o_conn;
 616         op->o_conn = NULL;
 617         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 618                 op->o_do_not_cache = is_oc;
 619                 op->o_conn = oconn;
 620                 return 1;
 621         }
 622         op->o_do_not_cache = is_oc;
 623         op->o_conn = oconn;
 624
 625         /*
 626          * Rewrite the search base, if required
 627          */
 628         dc.rwmap = &li->rwmap;
 629 #ifdef ENABLE_REWRITE
 630         dc.conn = op->o_conn;
 631         dc.rs = &rs;
 632         dc.ctx = "searchBase";
 633 #else
 634         dc.tofrom = 1;
 635         dc.normalized = 1;
 636 #endif
 637         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 638                 return 1;
 639         }
 640
 641         if ( at ) {
 642                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 643                 if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
 644                         rc = 1;
 645                         goto cleanup;
 646                 }
 647                 is_oc = ( strcasecmp( "objectclass", mapped.bv_val ) == 0 );
 648                 if ( oc && !is_oc ) {
 649                         gattr[0] = "objectclass";
 650                         gattr[1] = mapped.bv_val;
 651                         gattr[2] = NULL;
 652
 653                 } else {
 654                         gattr[0] = mapped.bv_val;
 655                         gattr[1] = NULL;
 656                 }
 657         }
 658
 659         if (oc) {
 660                 char *ptr;
 661                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 662                                                 BACKLDAP_MAP);
 663                 filter = ch_malloc( STRLENOF( "(objectclass=)" ) + mapped.bv_len + 1 );
 664                 ptr = lutil_strcopy( filter, "(objectclass=" );
 665                 ptr = lutil_strcopy( ptr, mapped.bv_val );
 666                 *ptr++ = ')';
 667                 *ptr++ = '\0';
 668         }
 669
 670         if ( ldap_search_ext_s( lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 671                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 672                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS )
 673         {
 674                 goto cleanup;
 675         }
 676
 677         e = ldap_first_entry( lc->ld, result );
 678         if ( e == NULL ) {
 679                 goto cleanup;
 680         }
 681
 682         *ent = ch_calloc( 1, sizeof( Entry ) );
 683
 684         rc = ldap_build_entry( op, e, *ent, &bdn, 0 );
 685
 686         if ( rc != LDAP_SUCCESS ) {
 687                 ch_free( *ent );
 688                 *ent = NULL;
 689         }
 690
 691 cleanup:
 692         if ( result ) {
 693                 ldap_msgfree( result );
 694         }
 695
 696         if ( filter ) {
 697                 ch_free( filter );
 698         }
 699
 700         if ( mdn.bv_val != ndn->bv_val ) {
 701                 ch_free( mdn.bv_val );
 702         }
 703
 704         return rc;
 705 }
 706