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

   1 /*
   2  * Copyright 1998-2001 The OpenLDAP Foundation, All Rights Reserved.
   3  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   4  *
   5  * Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
   6  *
   7  * This work has been developed to fulfill the requirements
   8  * of SysNet s.n.c. <http:www.sys-net.it> and it has been donated
   9  * to the OpenLDAP Foundation in the hope that it may be useful
  10  * to the Open Source community, but WITHOUT ANY WARRANTY.
  11  *
  12  * Permission is granted to anyone to use this software for any purpose
  13  * on any computer system, and to alter it and redistribute it, subject
  14  * to the following restrictions:
  15  *
  16  * 1. The author and SysNet s.n.c. are not responsible for the consequences
  17  *    of use of this software, no matter how awful, even if they arise from
  18  *    flaws in it.
  19  *
  20  * 2. The origin of this software must not be misrepresented, either by
  21  *    explicit claim or by omission.  Since few users ever read sources,
  22  *    credits should appear in the documentation.
  23  *
  24  * 3. Altered versions must be plainly marked as such, and must not be
  25  *    misrepresented as being the original software.  Since few users
  26  *    ever read sources, credits should appear in the documentation.
  27  *    SysNet s.n.c. cannot be responsible for the consequences of the
  28  *    alterations.
  29  *
  30  * 4. This notice may not be removed or altered.
  31  *
  32  *
  33  * This software is based on the backend back-ldap, implemented
  34  * by Howard Chu <hyc@highlandsun.com>, and modified by Mark Valence
  35  * <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
  36  * contributors. The contribution of the original software to the present
  37  * implementation is acknowledged in this copyright statement.
  38  *
  39  * A special acknowledgement goes to Howard for the overall architecture
  40  * (and for borrowing large pieces of code), and to Mark, who implemented
  41  * from scratch the attribute/objectclass mapping.
  42  *
  43  * The original copyright statement follows.
  44  *
  45  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
  46  *
  47  * Permission is granted to anyone to use this software for any purpose
  48  * on any computer system, and to alter it and redistribute it, subject
  49  * to the following restrictions:
  50  *
  51  * 1. The author is not responsible for the consequences of use of this
  52  *    software, no matter how awful, even if they arise from flaws in it.
  53  *
  54  * 2. The origin of this software must not be misrepresented, either by
  55  *    explicit claim or by omission.  Since few users ever read sources,
  56  *    credits should appear in the documentation.
  57  *
  58  * 3. Altered versions must be plainly marked as such, and must not be
  59  *    misrepresented as being the original software.  Since few users
  60  *    ever read sources, credits should appear in the
  61  *    documentation.
  62  *
  63  * 4. This notice may not be removed or altered.
  64  *
  65  */
  66
  67 #include "portable.h"
  68
  69 #include <stdio.h>
  70
  71 #include <ac/socket.h>
  72 #include <ac/string.h>
  73 #include <ac/time.h>
  74
  75 #include "slap.h"
  76 #include "../back-ldap/back-ldap.h"
  77 #include "back-meta.h"
  78 #include "ldap_pvt.h"
  79
  80 static void
  81 meta_send_entry(
  82                 Backend         *be,
  83                 Operation       *op,
  84                 struct metaconn *lc,
  85                 int             i,
  86                 LDAPMessage     *e,
  87                 struct berval           **attrs,
  88                 int             attrsonly
  89 );
  90
  91 static int
  92 is_one_level_rdn(
  93                 const char *rdn,
  94                 int len
  95 );
  96
  97 int
  98 meta_back_search(
  99                 Backend         *be,
 100                 Connection      *conn,
 101                 Operation       *op,
 102                 const char      *base,
 103                 const char      *nbase,
 104                 int             scope,
 105                 int             deref,
 106                 int             slimit,
 107                 int             tlimit,
 108                 Filter          *filter,
 109                 const char      *filterstr,
 110                 struct berval           **attrs,
 111                 int             attrsonly
 112 )
 113 {
 114         struct metainfo *li = ( struct metainfo * )be->be_private;
 115         struct metaconn *lc;
 116         struct metasingleconn **lsc;
 117         struct timeval  tv;
 118         LDAPMessage     *res, *e;
 119         int     count, rc = 0, *msgid, sres = LDAP_NO_SUCH_OBJECT;
 120         char *match = NULL, *err = NULL;
 121         char *mbase = NULL, *mfilter = NULL, *mmatch = NULL,
 122                 *mapped_filter = NULL, **mapped_attrs = NULL;
 123
 124         int i, last = 0, candidates = 0, nbaselen, op_type;
 125         struct slap_limits_set *limit = NULL;
 126         int isroot = 0;
 127
 128         if ( scope == LDAP_SCOPE_BASE ) {
 129                 op_type = META_OP_REQUIRE_SINGLE;
 130         } else {
 131                 op_type = META_OP_ALLOW_MULTIPLE;
 132         }
 133
 134         lc = meta_back_getconn( li, conn, op, op_type, nbase, NULL );
 135         if ( !lc || !meta_back_dobind( lc, op ) ) {
 136                 return -1;
 137         }
 138
 139         /*
 140          * Array of message id of each target
 141          */
 142         msgid = ch_calloc( sizeof( int ), li->ntargets );
 143         if ( msgid == NULL ) {
 144                 send_search_result( conn, op, LDAP_OPERATIONS_ERROR,
 145                                 NULL, NULL, NULL, NULL, 0 );
 146                 return -1;
 147         }
 148
 149         nbaselen = strlen( nbase );
 150
 151         /* if not root, get appropriate limits */
 152         if ( be_isroot( be, &op->o_ndn ) ) {
 153                 isroot = 1;
 154         } else {
 155                 ( void ) get_limits( be, op->o_ndn.bv_val, &limit );
 156         }
 157
 158         /* if no time limit requested, rely on remote server limits */
 159         /* if requested limit higher than hard limit, abort */
 160         if ( !isroot && tlimit > limit->lms_t_hard ) {
 161                 /* no hard limit means use soft instead */
 162                 if ( limit->lms_t_hard == 0 ) {
 163                         tlimit = limit->lms_t_soft;
 164
 165                 /* positive hard limit means abort */
 166                 } else if ( limit->lms_t_hard > 0 ) {
 167                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 168                                         NULL, NULL, NULL, NULL, 0 );
 169                         rc = 0;
 170                         goto finish;
 171                 }
 172
 173                 /* negative hard limit means no limit */
 174         }
 175
 176         /* if no size limit requested, rely on remote server limits */
 177         /* if requested limit higher than hard limit, abort */
 178         if ( !isroot && slimit > limit->lms_s_hard ) {
 179                 /* no hard limit means use soft instead */
 180                 if ( limit->lms_s_hard == 0 ) {
 181                         slimit = limit->lms_s_soft;
 182
 183                 /* positive hard limit means abort */
 184                 } else if ( limit->lms_s_hard > 0 ) {
 185                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 186                                         NULL, NULL, NULL, NULL, 0 );
 187                         rc = 0;
 188                         goto finish;
 189                 }
 190
 191                 /* negative hard limit means no limit */
 192         }
 193
 194         /*
 195          * Inits searches
 196          */
 197         for ( i = 0, lsc = lc->conns; lsc[ 0 ] != NULL; ++i, ++lsc ) {
 198                 char *realbase = ( char * )base;
 199                 int realscope = scope;
 200                 int suffixlen;
 201
 202                 if ( lsc[ 0 ]->candidate != META_CANDIDATE ) {
 203                         continue;
 204                 }
 205
 206                 if ( deref != -1 ) {
 207                         ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_DEREF,
 208                                         ( void * )&deref);
 209                 }
 210                 if ( tlimit != -1 ) {
 211                         ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_TIMELIMIT,
 212                                         ( void * )&tlimit);
 213                 }
 214                 if ( slimit != -1 ) {
 215                         ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_SIZELIMIT,
 216                                         ( void * )&slimit);
 217                 }
 218
 219                 /*
 220                  * modifies the base according to the scope, if required
 221                  */
 222                 suffixlen = strlen( li->targets[ i ]->suffix );
 223                 if ( suffixlen > nbaselen ) {
 224                         switch ( scope ) {
 225                         case LDAP_SCOPE_SUBTREE:
 226                                 /*
 227                                  * make the target suffix the new base
 228                                  * FIXME: this is very forgiving, because
 229                                  * illegal bases may be turned into
 230                                  * the suffix of the target.
 231                                  */
 232                                 if ( dn_issuffix( li->targets[ i ]->suffix,
 233                                                 nbase ) ) {
 234                                         realbase = li->targets[ i ]->suffix;
 235                                 } else {
 236                                         /*
 237                                          * this target is no longer candidate
 238                                          */
 239                                         lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
 240                                         continue;
 241                                 }
 242                                 break;
 243
 244                         case LDAP_SCOPE_ONELEVEL:
 245                                 if ( is_one_level_rdn( li->targets[ i ]->suffix,
 246                                                 suffixlen-nbaselen-1)
 247                         && dn_issuffix( li->targets[ i ]->suffix, nbase ) ) {
 248                                         /*
 249                                          * if there is exactly one level,
 250                                          * make the target suffix the new
 251                                          * base, and make scope "base"
 252                                          */
 253                                         realbase = li->targets[ i ]->suffix;
 254                                         realscope = LDAP_SCOPE_BASE;
 255                                         break;
 256                                 } /* else continue with the next case */
 257
 258                         case LDAP_SCOPE_BASE:
 259                                 /*
 260                                  * this target is no longer candidate
 261                                  */
 262                                 lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
 263                                 continue;
 264                         }
 265
 266                 }
 267
 268                 /*
 269                  * Rewrite the search base, if required
 270                  */
 271                 switch ( rewrite_session( li->targets[ i ]->rwinfo,
 272                                         "searchBase",
 273                                         realbase, conn, &mbase ) ) {
 274                 case REWRITE_REGEXEC_OK:
 275                 if ( mbase == NULL ) {
 276                         mbase = realbase;
 277                 }
 278 #ifdef NEW_LOGGING
 279                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 280                                 "[rw] searchBase: \"%s\" -> \"%s\"\n",
 281                                 base, mbase ));
 282 #else /* !NEW_LOGGING */
 283                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 284                                 base, mbase, "" );
 285 #endif /* !NEW_LOGGING */
 286                 break;
 287
 288                 case REWRITE_REGEXEC_UNWILLING:
 289                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 290                                         NULL, "Unwilling to perform",
 291                                         NULL, NULL );
 292                         rc = -1;
 293                         goto finish;
 294
 295                 case REWRITE_REGEXEC_ERR:
 296                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 297                                         NULL, "Operations error",
 298                                         NULL, NULL );
 299                         rc = -1;
 300                         goto finish;
 301                 }
 302
 303                 /*
 304                  * Rewrite the search filter, if required
 305                  */
 306                 switch ( rewrite_session( li->targets[ i ]->rwinfo,
 307                                         "searchFilter",
 308                                         filterstr, conn, &mfilter ) ) {
 309                 case REWRITE_REGEXEC_OK:
 310                         if ( mfilter == NULL || mfilter[ 0 ] == '\0') {
 311                                 if ( mfilter != NULL ) {
 312                                         free( mfilter );
 313                                 }
 314                                 mfilter = ( char * )filterstr;
 315                         }
 316 #ifdef NEW_LOGGING
 317                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 318                                         "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 319                                         filterstr, mfilter ));
 320 #else /* !NEW_LOGGING */
 321                         Debug( LDAP_DEBUG_ARGS,
 322                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 323                                 filterstr, mfilter, "" );
 324 #endif /* !NEW_LOGGING */
 325                         break;
 326
 327                 case REWRITE_REGEXEC_UNWILLING:
 328                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 329                                         NULL, NULL, NULL, NULL );
 330                         rc = -1;
 331                         goto finish;
 332
 333                 case REWRITE_REGEXEC_ERR:
 334                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 335                                         NULL, NULL, NULL, NULL );
 336                         rc = -1;
 337                         goto finish;
 338                 }
 339
 340                 /*
 341                  * Maps attributes in filter
 342                  */
 343                 mapped_filter = ldap_back_map_filter( &li->targets[ i ]->at_map,
 344                                 &li->targets[ i ]->oc_map,
 345                                 ( char * )mfilter, 0 );
 346                 if ( mapped_filter == NULL ) {
 347                         mapped_filter = ( char * )mfilter;
 348                 }
 349
 350                 /*
 351                  * Maps required attributes
 352                  */
 353                 mapped_attrs = ldap_back_map_attrs( &li->targets[ i ]->at_map,
 354                                 attrs, 0 );
 355                 if ( mapped_attrs == NULL ) {
 356                         mapped_attrs = attrs;
 357                 }
 358
 359                 /*
 360                  * Starts the search
 361                  */
 362                 msgid[ i ] = ldap_search( lsc[ 0 ]->ld, mbase, realscope,
 363                                 mapped_filter, mapped_attrs, attrsonly);
 364                 if ( msgid[ i ] == -1 ) {
 365                         lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
 366                         continue;
 367                 }
 368
 369                 if ( mapped_attrs != attrs ) {
 370                         charray_free( mapped_attrs );
 371                         mapped_attrs = NULL;
 372                 }
 373                 if ( mapped_filter != mfilter ) {
 374                         free( mapped_filter );
 375                         mapped_filter = NULL;
 376                 }
 377                 if ( mfilter != filterstr ) {
 378                         free( mfilter );
 379                         mfilter = NULL;
 380                 }
 381                 if ( mbase != realbase ) {
 382                         free( mbase );
 383                         mbase = NULL;
 384                 }
 385
 386                 ++candidates;
 387         }
 388
 389         /* We pull apart the ber result, stuff it into a slapd entry, and
 390          * let send_search_entry stuff it back into ber format. Slow & ugly,
 391          * but this is necessary for version matching, and for ACL processing.
 392          */
 393
 394
 395         /*
 396          * In case there are no candidates, no cycle takes place...
 397          */
 398         for ( count = 0, rc = 0; candidates > 0; ) {
 399                 int ab, gotit = 0;
 400
 401                 /* check for abandon */
 402                 ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 403                 ab = op->o_abandon;
 404                 ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 405
 406                 for ( i = 0, lsc = lc->conns; lsc[ 0 ] != NULL; lsc++, i++ ) {
 407                         if ( lsc[ 0 ]->candidate != META_CANDIDATE ) {
 408                                 continue;
 409                         }
 410
 411                         if ( ab ) {
 412                                 ldap_abandon( lsc[ 0 ]->ld, msgid[ i ] );
 413                                 rc = 0;
 414                                 break;
 415                         }
 416
 417                         if ( slimit > 0 && count == slimit ) {
 418                                 send_search_result( conn, op,
 419                                                 LDAP_SIZELIMIT_EXCEEDED,
 420                                                 NULL, NULL, NULL, NULL, count );
 421                                 goto finish;
 422                         }
 423
 424                         rc = ldap_result( lsc[ 0 ]->ld, msgid[ i ],
 425                                         0, &tv, &res );
 426
 427                         if ( rc == 0 ) {
 428                                 continue;
 429                         } else if ( rc == -1 ) {
 430                                 /* something REALLY bad happened! */
 431                                 ( void )meta_clear_unused_candidates( li,
 432                                                 lc, -1, 0 );
 433                                 send_search_result( conn, op,
 434                                                 LDAP_OPERATIONS_ERROR,
 435                                                 "", "", NULL, NULL, count );
 436
 437                                 /* anything else needs be done? */
 438                                 goto finish;
 439                         } else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 440                                 e = ldap_first_entry( lsc[ 0 ]->ld,res );
 441                                 meta_send_entry(be, op, lc, i, e, attrs,
 442                                                 attrsonly);
 443                                 count++;
 444                                 ldap_msgfree( res );
 445                                 gotit = 1;
 446                         } else {
 447                                 sres = ldap_result2error( lsc[ 0 ]->ld,
 448                                                 res, 1 );
 449                                 sres = ldap_back_map_result( sres );
 450                                 if ( err != NULL ) {
 451                                         free( err );
 452                                 }
 453                                 ldap_get_option( lsc[ 0 ]->ld,
 454                                                 LDAP_OPT_ERROR_STRING, &err );
 455                                 if ( match != NULL ) {
 456                                         free( match );
 457                                 }
 458                                 ldap_get_option( lsc[ 0 ]->ld,
 459                                                 LDAP_OPT_MATCHED_DN, &match );
 460
 461 #ifdef NEW_LOGGING
 462                                 LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
 463                                                 "meta_back_search [%d]"
 464                                                 " match=\"%s\" err=\"%s\"\n",
 465                                                 i, match, err ));
 466 #else /* !NEW_LOGGING */
 467                                 Debug( LDAP_DEBUG_ANY,
 468         "=>meta_back_search [%d] match=\"%s\" err=\"%s\"\n",
 469                                         i, match, err );
 470 #endif /* !NEW_LOGGING */
 471
 472                                 last = i;
 473                                 rc = 0;
 474
 475                                 /*
 476                                  * When no candidates are left,
 477                                  * the outer cycle finishes
 478                                  */
 479                                 lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
 480                                 --candidates;
 481                         }
 482                 }
 483
 484                 if ( ab ) {
 485                         goto finish;
 486                 }
 487
 488                 if ( gotit == 0 ) {
 489                         tv.tv_sec = 0;
 490                         tv.tv_usec = 100000;
 491                         ldap_pvt_thread_yield();
 492                 } else {
 493                         tv.tv_sec = 0;
 494                         tv.tv_usec = 0;
 495                 }
 496         }
 497
 498         if ( rc == -1 ) {
 499                 /*
 500                  * FIXME: need a strategy to handle errors
 501                  */
 502                 rc = meta_back_op_result( lc, op );
 503                 goto finish;
 504         }
 505
 506         /*
 507          * Rewrite the matched portion of the search base, if required
 508          *
 509          * FIXME: only the last one gets caught!
 510          */
 511         if ( match != NULL ) {
 512                 switch ( rewrite_session( li->targets[ last ]->rwinfo,
 513                                         "matchedDn", match, conn, &mmatch ) ) {
 514                 case REWRITE_REGEXEC_OK:
 515                         if ( mmatch == NULL ) {
 516                                 mmatch = ( char * )match;
 517                         }
 518 #ifdef NEW_LOGGING
 519                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 520                                         "[rw] matchedDn: \"%s\" -> \"%s\"\n",
 521                                         match, mmatch ));
 522 #else /* !NEW_LOGGING */
 523                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 524                                        " \"%s\" -> \"%s\"\n%s",
 525                                        match, mmatch, "" );
 526 #endif /* !NEW_LOGGING */
 527                         break;
 528
 529                 case REWRITE_REGEXEC_UNWILLING:
 530                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 531                                         NULL, NULL, NULL, NULL );
 532                         rc = -1;
 533                         goto finish;
 534
 535                 case REWRITE_REGEXEC_ERR:
 536                         send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 537                                         NULL, NULL, NULL, NULL );
 538                         rc = -1;
 539                         goto finish;
 540                 }
 541         }
 542
 543         send_search_result( conn, op, sres,
 544                 mmatch, err, NULL, NULL, count );
 545
 546 finish:;
 547         if ( match ) {
 548                 if ( mmatch != match ) {
 549                         free( mmatch );
 550                 }
 551                 free(match);
 552         }
 553
 554         if ( err ) {
 555                 free( err );
 556         }
 557
 558         if ( msgid ) {
 559                 free( msgid );
 560         }
 561
 562         return rc;
 563 }
 564
 565 static void
 566 meta_send_entry(
 567                 Backend *be,
 568                 Operation *op,
 569                 struct metaconn *lc,
 570                 int target,
 571                 LDAPMessage *e,
 572                 struct berval **attrs,
 573                 int attrsonly
 574 )
 575 {
 576         struct metainfo *li = ( struct metainfo * )be->be_private;
 577         char *a, *mapped;
 578         Entry ent;
 579         BerElement *ber = NULL;
 580         Attribute *attr, **attrp;
 581         struct berval *dummy = NULL;
 582         struct berval *bv;
 583         const char *text;
 584         char *dn;
 585
 586         struct metasingleconn *lsc = lc->conns[ target ];
 587
 588         dn = ldap_get_dn( lsc->ld, e );
 589         if ( dn == NULL ) {
 590                 return;
 591         }
 592
 593         /*
 594          * Rewrite the dn of the result, if needed
 595          */
 596         switch ( rewrite_session( li->targets[ target ]->rwinfo,
 597                                 "searchResult", dn, lc->conn, &ent.e_dn ) ) {
 598         case REWRITE_REGEXEC_OK:
 599                 if ( ent.e_dn == NULL ) {
 600                         ent.e_dn = dn;
 601                 } else {
 602 #ifdef NEW_LOGGING
 603                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 604                                         "[rw] searchResult[%d]:"
 605                                         " \"%s\" -> \"%s\"\n",
 606                                         target, dn, ent.e_dn ));
 607 #else /* !NEW_LOGGING */
 608                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult[%d]: \"%s\""
 609                                         " -> \"%s\"\n", target, dn, ent.e_dn );
 610 #endif /* !NEW_LOGGING */
 611                         free( dn );
 612                         dn = NULL;
 613                 }
 614                 break;
 615
 616         case REWRITE_REGEXEC_ERR:
 617         case REWRITE_REGEXEC_UNWILLING:
 618                 free( dn );
 619                 return;
 620         }
 621
 622         ent.e_ndn = ch_strdup( ent.e_dn );
 623         ( void )dn_normalize( ent.e_ndn );
 624
 625         /*
 626          * cache dn
 627          */
 628         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 629                 ( void )meta_dncache_update_entry( &li->cache,
 630                                                    ch_strdup( ent.e_ndn ),
 631                                                    target );
 632         }
 633
 634         ent.e_id = 0;
 635         ent.e_attrs = 0;
 636         ent.e_private = 0;
 637         attrp = &ent.e_attrs;
 638
 639         for ( a = ldap_first_attribute( lsc->ld, e, &ber );
 640                         a != NULL;
 641                         a = ldap_next_attribute( lsc->ld, e, ber ) )
 642         {
 643                 mapped = ldap_back_map( &li->targets[ target ]->at_map, a, 1 );
 644                 if ( mapped == NULL ) {
 645                         continue;
 646                 }
 647                 attr = ( Attribute * )ch_malloc( sizeof( Attribute ) );
 648                 if ( attr == NULL ) {
 649                         continue;
 650                 }
 651                 attr->a_next = 0;
 652                 attr->a_desc = NULL;
 653                 if ( slap_str2ad( mapped, &attr->a_desc, &text )
 654                                 != LDAP_SUCCESS) {
 655                         if (slap_str2undef_ad(mapped, &attr->a_desc, &text)
 656                                         != LDAP_SUCCESS) {
 657 #ifdef NEW_LOGGING
 658                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 659                                                 "slap_str2undef_ad(%s): "
 660                                                 "%s\n", mapped, text ));
 661 #else /* !NEW_LOGGING */
 662                                 Debug( LDAP_DEBUG_ANY,
 663                                                 "slap_str2undef_ad(%s): "
 664                                                 "%s\n%s", mapped, text, "" );
 665 #endif /* !NEW_LOGGING */
 666                                 ch_free(attr);
 667                                 continue;
 668                         }
 669                 }
 670                 attr->a_vals = ldap_get_values_len( lsc->ld, e, a );
 671                 if ( !attr->a_vals ) {
 672                         attr->a_vals = &dummy;
 673                 } else if ( strcasecmp( mapped, "objectClass" ) == 0 ) {
 674                         int i, last;
 675                         for ( last = 0; attr->a_vals[ last ]; ++last ) ;
 676                         for ( i = 0; ( bv = attr->a_vals[ i ] ); i++ ) {
 677                                 mapped = ldap_back_map(
 678                                                 &li->targets[ target]->oc_map,
 679                                                 bv->bv_val, 1 );
 680                                 if ( mapped == NULL ) {
 681                                         ber_bvfree( attr->a_vals[ i ] );
 682                                         attr->a_vals[ i ] = NULL;
 683                                         if ( --last < 0 ) {
 684                                                 break;
 685                                         }
 686                                         attr->a_vals[ i ] =
 687                                                 attr->a_vals[ last ];
 688                                         attr->a_vals[ last ] = NULL;
 689                                         --i;
 690                                 } else if ( mapped != bv->bv_val ) {
 691                                         ch_free( bv->bv_val );
 692                                         bv->bv_val = ch_strdup( mapped );
 693                                         bv->bv_len = strlen( mapped );
 694                                 }
 695                         }
 696                 /*
 697                  * It is necessary to try to rewrite attributes with
 698                  * dn syntax because they might be used in ACLs as
 699                  * members of groups; since ACLs are applied to the
 700                  * rewritten stuff, no dn-based subecj clause could
 701                  * be used at the ldap backend side (see
 702                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 703                  * The problem can be overcome by moving the dn-based
 704                  * ACLs to the target directory server, and letting
 705                  * everything pass thru the ldap backend.
 706                  */
 707                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 708                                         SLAPD_DN_SYNTAX ) == 0 ) {
 709                         int i;
 710                         for ( i = 0; ( bv = attr->a_vals[ i ] ); i++ ) {
 711                                 char *newval;
 712
 713                                 switch ( rewrite_session( li->targets[ target ]->rwinfo,
 714                                                         "searchResult",
 715                                                         bv->bv_val,
 716                                                         lc->conn, &newval )) {
 717                                 case REWRITE_REGEXEC_OK:
 718                                         /* left as is */
 719                                         if ( newval == NULL ) {
 720                                                 break;
 721                                         }
 722 #ifdef NEW_LOGGING
 723                                         LDAP_LOG(( "backend",
 724                                                         LDAP_LEVEL_DETAIL1,
 725                                                         "[rw] searchResult on"
 726                                                         " attr=%s:"
 727                                                         " \"%s\" -> \"%s\"\n",
 728                                         attr->a_desc->ad_type->sat_cname.bv_val,
 729                                                         bv->bv_val, newval ));
 730 #else /* !NEW_LOGGING */
 731                                         Debug( LDAP_DEBUG_ARGS,
 732                                                 "rw> searchResult on attr=%s:"
 733                                                 " \"%s\" -> \"%s\"\n",
 734                                         attr->a_desc->ad_type->sat_cname.bv_val,
 735                                                 bv->bv_val, newval );
 736 #endif /* !NEW_LOGGING */
 737
 738                                         free( bv->bv_val );
 739                                         bv->bv_val = newval;
 740                                         bv->bv_len = strlen( newval );
 741
 742                                         break;
 743
 744                                 case REWRITE_REGEXEC_UNWILLING:
 745
 746                                 case REWRITE_REGEXEC_ERR:
 747                                         /*
 748                                          * FIXME: better give up,
 749                                          * skip the attribute
 750                                          * or leave it untouched?
 751                                          */
 752                                         break;
 753                                 }
 754                         }
 755                 }
 756                 *attrp = attr;
 757                 attrp = &attr->a_next;
 758         }
 759         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 760         while ( ent.e_attrs ) {
 761                 attr = ent.e_attrs;
 762                 ent.e_attrs = attr->a_next;
 763                 if ( attr->a_vals != &dummy ) {
 764                         ber_bvecfree(attr->a_vals);
 765                 }
 766                 free( attr );
 767         }
 768         if ( ber ) {
 769                 ber_free( ber, 0 );
 770         }
 771
 772         if ( ent.e_dn ) {
 773                 free( ent.e_dn );
 774         }
 775         if ( ent.e_ndn ) {
 776                 free( ent.e_ndn );
 777         }
 778 }
 779
 780 static int
 781 is_one_level_rdn(
 782                 const char *rdn,
 783                 int len
 784 )
 785 {
 786         for ( ; len--; ) {
 787                 if ( LDAP_DNSEPARATOR( rdn[ len ] ) ) {
 788                         return 0;
 789                 }
 790         }
 791
 792         return 1;
 793 }
 794