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

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7 /* This is an altered version */
   8 /*
   9  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
  10  *
  11  * Permission is granted to anyone to use this software for any purpose
  12  * on any computer system, and to alter it and redistribute it, subject
  13  * to the following restrictions:
  14  *
  15  * 1. The author is not responsible for the consequences of use of this
  16  *    software, no matter how awful, even if they arise from flaws in it.
  17  *
  18  * 2. The origin of this software must not be misrepresented, either by
  19  *    explicit claim or by omission.  Since few users ever read sources,
  20  *    credits should appear in the documentation.
  21  *
  22  * 3. Altered versions must be plainly marked as such, and must not be
  23  *    misrepresented as being the original software.  Since few users
  24  *    ever read sources, credits should appear in the documentation.
  25  *
  26  * 4. This notice may not be removed or altered.
  27  *
  28  *
  29  *
  30  * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
  31  *
  32  * This software is being modified by Pierangelo Masarati.
  33  * The previously reported conditions apply to the modified code as well.
  34  * Changes in the original code are highlighted where required.
  35  * Credits for the original code go to the author, Howard Chu.
  36  */
  37
  38 #include "portable.h"
  39
  40 #include <stdio.h>
  41
  42 #include <ac/socket.h>
  43 #include <ac/string.h>
  44 #include <ac/time.h>
  45
  46 #include "slap.h"
  47 #include "back-ldap.h"
  48 #undef ldap_debug       /* silence a warning in ldap-int.h */
  49 #include "../../../libraries/libldap/ldap-int.h"
  50
  51 #include "lutil.h"
  52
  53 static int
  54 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  55          struct berval *bdn, int flags );
  56 #define LDAP_BUILD_ENTRY_PRIVATE        0x01
  57 #define LDAP_BUILD_ENTRY_NORMALIZE      0x02
  58
  59 static struct berval dummy = { 0, NULL };
  60
  61 int
  62 ldap_back_search(
  63     Operation   *op,
  64     SlapReply *rs )
  65 {
  66         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  67         struct ldapconn *lc;
  68         struct timeval  tv;
  69         LDAPMessage             *res, *e;
  70         int     rc = 0, msgid;
  71         char *match = NULL;
  72         char **mapped_attrs = NULL;
  73         struct berval mbase;
  74         struct berval mfilter = { 0, NULL };
  75         struct slap_limits_set *limit = NULL;
  76         int isroot = 0;
  77         dncookie dc;
  78
  79         lc = ldap_back_getconn(op, rs);
  80         if ( !lc ) {
  81                 return( -1 );
  82         }
  83
  84         /*
  85          * FIXME: in case of values return filter, we might want
  86          * to map attrs and maybe rewrite value
  87          */
  88         if ( !ldap_back_dobind( lc, op, rs ) ) {
  89                 return( -1 );
  90         }
  91
  92         /* if not root, get appropriate limits */
  93         if ( be_isroot( op->o_bd, &op->o_ndn ) ) {
  94                 isroot = 1;
  95         } else {
  96                 ( void ) get_limits( op->o_bd, &op->o_ndn, &limit );
  97         }
  98
  99         /* if no time limit requested, rely on remote server limits */
 100         /* if requested limit higher than hard limit, abort */
 101         if ( !isroot && op->oq_search.rs_tlimit > limit->lms_t_hard ) {
 102                 /* no hard limit means use soft instead */
 103                 if ( limit->lms_t_hard == 0
 104                                 && limit->lms_t_soft > -1
 105                                 && op->oq_search.rs_tlimit > limit->lms_t_soft ) {
 106                         op->oq_search.rs_tlimit = limit->lms_t_soft;
 107
 108                 /* positive hard limit means abort */
 109                 } else if ( limit->lms_t_hard > 0 ) {
 110                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 111                         rc = 0;
 112                         goto finish;
 113                 }
 114
 115                 /* negative hard limit means no limit */
 116         }
 117
 118         /* if no size limit requested, rely on remote server limits */
 119         /* if requested limit higher than hard limit, abort */
 120         if ( !isroot && op->oq_search.rs_slimit > limit->lms_s_hard ) {
 121                 /* no hard limit means use soft instead */
 122                 if ( limit->lms_s_hard == 0
 123                                 && limit->lms_s_soft > -1
 124                                 && op->oq_search.rs_slimit > limit->lms_s_soft ) {
 125                         op->oq_search.rs_slimit = limit->lms_s_soft;
 126
 127                 /* positive hard limit means abort */
 128                 } else if ( limit->lms_s_hard > 0 ) {
 129                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 130                         rc = 0;
 131                         goto finish;
 132                 }
 133
 134                 /* negative hard limit means no limit */
 135         }
 136
 137         /* should we check return values? */
 138         if (op->oq_search.rs_deref != -1)
 139                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->oq_search.rs_deref);
 140         if (op->oq_search.rs_tlimit != -1) {
 141                 tv.tv_sec = op->oq_search.rs_tlimit;
 142                 tv.tv_usec = 0;
 143         } else {
 144                 tv.tv_sec = 0;
 145         }
 146
 147         /*
 148          * Rewrite the search base, if required
 149          */
 150 #ifdef ENABLE_REWRITE
 151         dc.rw = li->rwinfo;
 152         dc.conn = op->o_conn;
 153         dc.rs = rs;
 154         dc.ctx = "searchBase";
 155 #else
 156         dc.li = li;
 157         dc.tofrom = 1;
 158         dc.normalized = 0;
 159 #endif
 160         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mbase ) ) {
 161                 send_ldap_result( op, rs );
 162                 return -1;
 163         }
 164
 165 #ifdef ENABLE_REWRITE
 166         rc = ldap_back_filter_map_rewrite_( li->rwinfo, op->o_conn,
 167                         &li->at_map, &li->oc_map, op->oq_search.rs_filter, &mfilter,
 168                         BACKLDAP_MAP );
 169 #else /* ! ENABLE_REWRITE */
 170         rc = ldap_back_filter_map_rewrite_( &li->at_map, &li->oc_map,
 171                         op->oq_search.rs_filter, &mfilter, BACKLDAP_MAP );
 172 #endif /* ! ENABLE_REWRITE */
 173
 174         if ( rc ) {
 175                 rs->sr_err = LDAP_OTHER;
 176                 rs->sr_text = "Rewrite error";
 177                 rc = -1;
 178                 goto finish;
 179         }
 180
 181         rs->sr_err = ldap_back_map_attrs( &li->at_map, op->oq_search.rs_attrs,
 182                         BACKLDAP_MAP, &mapped_attrs );
 183         if ( rs->sr_err ) {
 184                 rc = -1;
 185                 goto finish;
 186         }
 187
 188 #if 0
 189         if ( mapped_attrs == NULL && op->oq_search.rs_attrs) {
 190                 int count;
 191
 192                 /* this can happen only if ch_calloc() fails
 193                  * in ldap_back_map_attrs() */
 194                 for (count=0; op->oq_search.rs_attrs[count].an_name.bv_val; count++);
 195                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 196                 for (count=0; op->oq_search.rs_attrs[count].an_name.bv_val; count++) {
 197                         mapped_attrs[count] = op->oq_search.rs_attrs[count].an_name.bv_val;
 198                 }
 199                 mapped_attrs[count] = NULL;
 200         }
 201 #endif
 202
 203         rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
 204                         op->oq_search.rs_scope, mfilter.bv_val,
 205                         mapped_attrs, op->oq_search.rs_attrsonly,
 206                         op->o_ctrls, NULL,
 207                         tv.tv_sec ? &tv : NULL, op->oq_search.rs_slimit,
 208                         &msgid);
 209         if ( rs->sr_err != LDAP_SUCCESS ) {
 210 fail:;
 211                 rc = ldap_back_op_result(lc, op, rs, msgid, 0);
 212                 goto finish;
 213         }
 214
 215         /* We pull apart the ber result, stuff it into a slapd entry, and
 216          * let send_search_entry stuff it back into ber format. Slow & ugly,
 217          * but this is necessary for version matching, and for ACL processing.
 218          */
 219
 220         for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 221         {
 222                 /* check for abandon */
 223                 if (op->o_abandon) {
 224                         ldap_abandon(lc->ld, msgid);
 225                         rc = 0;
 226                         goto finish;
 227                 }
 228
 229                 if (rc == 0) {
 230                         tv.tv_sec = 0;
 231                         tv.tv_usec = 100000;
 232                         ldap_pvt_thread_yield();
 233
 234                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 235                         Entry ent;
 236                         struct berval bdn;
 237                         e = ldap_first_entry(lc->ld,res);
 238                         if ( ldap_build_entry(op, e, &ent, &bdn,
 239                                                 LDAP_BUILD_ENTRY_PRIVATE) == LDAP_SUCCESS ) {
 240                                 rs->sr_entry = &ent;
 241                                 rs->sr_attrs = op->oq_search.rs_attrs;
 242                                 send_search_entry( op, rs );
 243                                 while (ent.e_attrs) {
 244                                         Attribute *a;
 245                                         BerVarray v;
 246
 247                                         a = ent.e_attrs;
 248                                         ent.e_attrs = a->a_next;
 249
 250                                         v = a->a_vals;
 251                                         if (a->a_vals != &dummy)
 252                                                 ber_bvarray_free(a->a_vals);
 253                                         if (a->a_nvals != v)
 254                                                 ber_bvarray_free(a->a_nvals);
 255                                         ch_free(a);
 256                                 }
 257
 258                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 259                                         free( ent.e_dn );
 260                                 if ( ent.e_ndn )
 261                                         free( ent.e_ndn );
 262                         }
 263                         ldap_msgfree(res);
 264
 265                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 266                         char            **references = NULL;
 267                         int             cnt;
 268
 269                         rc = ldap_parse_reference( lc->ld, res,
 270                                         &references, &rs->sr_ctrls, 1 );
 271
 272                         if ( rc != LDAP_SUCCESS ) {
 273                                 continue;
 274                         }
 275
 276                         if ( references == NULL ) {
 277                                 continue;
 278                         }
 279
 280                         for ( cnt = 0; references[ cnt ]; cnt++ )
 281                                 /* NO OP */ ;
 282
 283                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 284
 285                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 286                                 rs->sr_ref[ cnt ].bv_val = references[ cnt ];
 287                                 rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
 288                         }
 289
 290                         /* ignore return value by now */
 291                         ( void )send_search_reference( op, rs );
 292
 293                         /* cleanup */
 294                         if ( references ) {
 295                                 ldap_value_free( references );
 296                                 ch_free( rs->sr_ref );
 297                                 rs->sr_ref = NULL;
 298                         }
 299
 300                         if ( rs->sr_ctrls ) {
 301                                 ldap_controls_free( rs->sr_ctrls );
 302                                 rs->sr_ctrls = NULL;
 303                         }
 304
 305                 } else {
 306                         rc = ldap_parse_result(lc->ld, res, &rs->sr_err, &match,
 307                                 (char **)&rs->sr_text, NULL, NULL, 1);
 308                         if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
 309                         rs->sr_err = ldap_back_map_result(rs);
 310                         rc = 0;
 311                         break;
 312                 }
 313         }
 314
 315         if (rc == -1)
 316                 goto fail;
 317
 318         /*
 319          * Rewrite the matched portion of the search base, if required
 320          */
 321         if ( match && *match ) {
 322                 struct berval dn, mdn;
 323
 324 #ifdef ENABLE_REWRITE
 325                 dc.ctx = "matchedDn";
 326 #else
 327                 dc.tofrom = 0;
 328                 dc.normalized = 0;
 329 #endif
 330                 ber_str2bv(match, 0, 0, &dn);
 331                 ldap_back_dn_massage(&dc, &dn, &mdn);
 332                 rs->sr_matched = mdn.bv_val;
 333         }
 334         if ( rs->sr_v2ref ) {
 335                 rs->sr_err = LDAP_REFERRAL;
 336         }
 337
 338 finish:;
 339         send_ldap_result( op, rs );
 340
 341         if ( match ) {
 342                 if ( rs->sr_matched != match ) {
 343                         free( (char *)rs->sr_matched );
 344                 }
 345                 rs->sr_matched = NULL;
 346                 LDAP_FREE(match);
 347         }
 348         if ( rs->sr_text ) {
 349                 LDAP_FREE( (char *)rs->sr_text );
 350                 rs->sr_text = NULL;
 351         }
 352         if ( mapped_attrs ) {
 353                 ch_free( mapped_attrs );
 354         }
 355         if ( mfilter.bv_val != op->oq_search.rs_filterstr.bv_val ) {
 356                 ch_free( mfilter.bv_val );
 357         }
 358         if ( mbase.bv_val != op->o_req_dn.bv_val ) {
 359                 free( mbase.bv_val );
 360         }
 361
 362         return rc;
 363 }
 364
 365 static int
 366 ldap_build_entry(
 367         Operation *op,
 368         LDAPMessage *e,
 369         Entry *ent,
 370         struct berval *bdn,
 371         int flags
 372 )
 373 {
 374         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 375         struct berval a, mapped;
 376         BerElement ber = *e->lm_ber;
 377         Attribute *attr, **attrp;
 378         struct berval *bv;
 379         const char *text;
 380         int last;
 381         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 382         int normalize = flags & LDAP_BUILD_ENTRY_NORMALIZE;
 383         dncookie dc;
 384
 385         /* safe assumptions ... */
 386         assert( ent );
 387         ent->e_bv.bv_val = NULL;
 388
 389         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 390                 return LDAP_DECODING_ERROR;
 391         }
 392
 393         /*
 394          * Rewrite the dn of the result, if needed
 395          */
 396 #ifdef ENABLE_REWRITE
 397         dc.rw = li->rwinfo;
 398         dc.conn = op->o_conn;
 399         dc.rs = NULL;
 400         dc.ctx = "searchResult";
 401 #else
 402         dc.li = li;
 403         dc.tofrom = 0;
 404         dc.normalized = 0;
 405 #endif
 406         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 407                 return LDAP_OTHER;
 408         }
 409
 410         /*
 411          * Note: this may fail if the target host(s) schema differs
 412          * from the one known to the meta, and a DN with unknown
 413          * attributes is returned.
 414          *
 415          * FIXME: should we log anything, or delegate to dnNormalize2?
 416          */
 417         if ( dnNormalize2( NULL, &ent->e_name, &ent->e_nname ) != LDAP_SUCCESS ) {
 418                 return LDAP_INVALID_DN_SYNTAX;
 419         }
 420
 421         ent->e_id = 0;
 422         ent->e_attrs = 0;
 423         ent->e_private = 0;
 424         attrp = &ent->e_attrs;
 425
 426 #ifdef ENABLE_REWRITE
 427         dc.ctx = "searchAttrDN";
 428 #endif
 429         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 430                 ldap_back_map(&li->at_map, &a, &mapped, BACKLDAP_REMAP);
 431                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 432                         continue;
 433                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 434                 if (attr == NULL)
 435                         continue;
 436                 attr->a_flags = 0;
 437                 attr->a_next = 0;
 438                 attr->a_desc = NULL;
 439                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 440                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 441                                         != LDAP_SUCCESS) {
 442 #ifdef NEW_LOGGING
 443                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 444                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 445 #else /* !NEW_LOGGING */
 446                                 Debug( LDAP_DEBUG_ANY,
 447                                                 "slap_bv2undef_ad(%s):  "
 448                                                 "%s\n%s", mapped.bv_val, text, "" );
 449 #endif /* !NEW_LOGGING */
 450                                 ch_free(attr);
 451                                 continue;
 452                         }
 453                 }
 454
 455                 /* no subschemaSubentry */
 456                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 457
 458                         /*
 459                          * We eat target's subschemaSubentry because
 460                          * a search for this value is likely not
 461                          * to resolve to the appropriate backend;
 462                          * later, the local subschemaSubentry is
 463                          * added.
 464                          */
 465                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 466
 467                         ch_free(attr);
 468                         continue;
 469                 }
 470
 471                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 472                                 || attr->a_vals == NULL ) {
 473                         /*
 474                          * Note: attr->a_vals can be null when using
 475                          * values result filter
 476                          */
 477                         if (private) {
 478                                 attr->a_vals = &dummy;
 479                         } else {
 480                                 attr->a_vals = ch_malloc(sizeof(struct berval));
 481                                 attr->a_vals->bv_val = NULL;
 482                                 attr->a_vals->bv_len = 0;
 483                         }
 484                         last = 0;
 485                 } else {
 486                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 487                 }
 488                 if ( last == 0 ) {
 489                         /* empty */
 490                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 491                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 492                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 493                                 ldap_back_map(&li->oc_map, bv, &mapped,
 494                                                 BACKLDAP_REMAP);
 495                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 496                                         LBER_FREE(bv->bv_val);
 497                                         bv->bv_val = NULL;
 498                                         if (--last < 0)
 499                                                 break;
 500                                         *bv = attr->a_vals[last];
 501                                         attr->a_vals[last].bv_val = NULL;
 502                                         bv--;
 503
 504                                 } else if ( mapped.bv_val != bv->bv_val ) {
 505                                         /*
 506                                          * FIXME: after LBER_FREEing
 507                                          * the value is replaced by
 508                                          * ch_alloc'ed memory
 509                                          */
 510                                         LBER_FREE(bv->bv_val);
 511                                         ber_dupbv( bv, &mapped );
 512                                 }
 513                         }
 514
 515                 /*
 516                  * It is necessary to try to rewrite attributes with
 517                  * dn syntax because they might be used in ACLs as
 518                  * members of groups; since ACLs are applied to the
 519                  * rewritten stuff, no dn-based subject clause could
 520                  * be used at the ldap backend side (see
 521                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 522                  * The problem can be overcome by moving the dn-based
 523                  * ACLs to the target directory server, and letting
 524                  * everything pass thru the ldap backend.
 525                  */
 526                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 527                                 slap_schema.si_syn_distinguishedName ) {
 528                         int     last, i;
 529
 530                         /*
 531                          * FIXME: should use ldap_dnattr_rewrite(),
 532                          * but need a different free() callback ...
 533                          */
 534
 535                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 536
 537                         for ( i = 0; attr->a_vals[i].bv_val; i++ ) {
 538                                 struct berval   newval = { 0, NULL };
 539
 540                                 bv = &attr->a_vals[i];
 541                                 switch ( ldap_back_dn_massage( &dc, bv, &newval ) ) {
 542                                 case LDAP_UNWILLING_TO_PERFORM:
 543                                         LBER_FREE( bv->bv_val );
 544                                         if ( last > i ) {
 545                                                 *bv = attr->a_vals[last];
 546                                         }
 547                                         attr->a_vals[last].bv_val = NULL;
 548                                         last--;
 549                                         break;
 550
 551                                 default:
 552                                         if ( newval.bv_val && bv->bv_val != newval.bv_val ) {
 553                                                 LBER_FREE( bv->bv_val );
 554                                                 *bv = newval;
 555                                         }
 556                                         break;
 557                                 }
 558                         }
 559                 }
 560
 561 next_attr:;
 562
 563                 if ( normalize && last && attr->a_desc->ad_type->sat_equality &&
 564                         attr->a_desc->ad_type->sat_equality->smr_normalize ) {
 565                         int i;
 566
 567                         attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
 568                         for (i=0; i<last; i++) {
 569                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
 570                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 571                                         attr->a_desc->ad_type->sat_syntax,
 572                                         attr->a_desc->ad_type->sat_equality,
 573                                         &attr->a_vals[i], &attr->a_nvals[i] );
 574                         }
 575                         attr->a_nvals[i].bv_val = NULL;
 576                         attr->a_nvals[i].bv_len = 0;
 577                 } else {
 578                         attr->a_nvals = attr->a_vals;
 579                 }
 580                 *attrp = attr;
 581                 attrp = &attr->a_next;
 582         }
 583         /* make sure it's free'able */
 584         if (!private && ent->e_name.bv_val == bdn->bv_val)
 585                 ber_dupbv( &ent->e_name, bdn );
 586         return LDAP_SUCCESS;
 587 }
 588
 589 /* return 0 IFF we can retrieve the entry with ndn
 590  */
 591 int
 592 ldap_back_entry_get(
 593         Operation *op,
 594         struct berval   *ndn,
 595         ObjectClass *oc,
 596         AttributeDescription *at,
 597         int rw,
 598         Entry **ent
 599 )
 600 {
 601         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 602         struct ldapconn *lc;
 603         int rc = 1, is_oc;
 604         struct berval mapped = { 0, NULL }, bdn, mdn;
 605         LDAPMessage     *result = NULL, *e = NULL;
 606         char *gattr[3];
 607         char *filter = NULL;
 608         Connection *oconn;
 609         SlapReply rs;
 610         dncookie dc;
 611
 612         /* Tell getconn this is a privileged op */
 613         is_oc = op->o_do_not_cache;
 614         op->o_do_not_cache = 1;
 615         lc = ldap_back_getconn(op, &rs);
 616         oconn = op->o_conn;
 617         op->o_conn = NULL;
 618         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 619                 op->o_do_not_cache = is_oc;
 620                 op->o_conn = oconn;
 621                 return 1;
 622         }
 623         op->o_do_not_cache = is_oc;
 624         op->o_conn = oconn;
 625
 626         /*
 627          * Rewrite the search base, if required
 628          */
 629 #ifdef ENABLE_REWRITE
 630         dc.rw = li->rwinfo;
 631         dc.conn = op->o_conn;
 632         dc.rs = &rs;
 633         dc.ctx = "searchBase";
 634 #else
 635         dc.li = li;
 636         dc.tofrom = 1;
 637         dc.normalized = 1;
 638 #endif
 639         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 640                 return 1;
 641         }
 642
 643         ldap_back_map(&li->at_map, &at->ad_cname, &mapped, BACKLDAP_MAP);
 644         if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 645                 rc = 1;
 646                 goto cleanup;
 647         }
 648
 649         is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
 650         if (oc && !is_oc) {
 651                 gattr[0] = "objectclass";
 652                 gattr[1] = mapped.bv_val;
 653                 gattr[2] = NULL;
 654         } else {
 655                 gattr[0] = mapped.bv_val;
 656                 gattr[1] = NULL;
 657         }
 658         if (oc) {
 659                 char *ptr;
 660                 ldap_back_map(&li->oc_map, &oc->soc_cname, &mapped,
 661                                                 BACKLDAP_MAP);
 662                 filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
 663                 ptr = lutil_strcopy(filter, "(objectclass=");
 664                 ptr = lutil_strcopy(ptr, mapped.bv_val);
 665                 *ptr++ = ')';
 666                 *ptr++ = '\0';
 667         }
 668
 669         if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 670                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 671                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
 672         {
 673                 goto cleanup;
 674         }
 675
 676         if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
 677                 goto cleanup;
 678         }
 679
 680         *ent = ch_calloc(1,sizeof(Entry));
 681
 682         rc = ldap_build_entry(op, e, *ent, &bdn, LDAP_BUILD_ENTRY_NORMALIZE);
 683
 684         if (rc != LDAP_SUCCESS) {
 685                 ch_free(*ent);
 686                 *ent = NULL;
 687         }
 688
 689 cleanup:
 690         if (result) {
 691                 ldap_msgfree(result);
 692         }
 693
 694         if ( filter ) {
 695                 ch_free( filter );
 696         }
 697
 698         if ( mdn.bv_val != ndn->bv_val ) {
 699                 ch_free( mdn.bv_val );
 700         }
 701
 702         return(rc);
 703 }
 704