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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2005 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/socket.h>
  28 #include <ac/string.h>
  29
  30
  31 #define AVL_INTERNAL
  32 #include "slap.h"
  33 #include "../back-ldap/back-ldap.h"
  34 #include "back-meta.h"
  35
  36 static LDAP_REBIND_PROC meta_back_rebind;
  37
  38 static int
  39 meta_back_single_bind(
  40         Operation               *op,
  41         SlapReply               *rs,
  42         metaconn_t              *mc,
  43         int                     candidate );
  44
  45 int
  46 meta_back_bind( Operation *op, SlapReply *rs )
  47 {
  48         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  49         metaconn_t      *mc;
  50
  51         int             rc = LDAP_OTHER,
  52                         i, gotit = 0, isroot = 0;
  53
  54         SlapReply       *candidates = meta_back_candidates_get( op );
  55
  56         rs->sr_err = LDAP_SUCCESS;
  57
  58         Debug( LDAP_DEBUG_ARGS, "meta_back_bind: dn: %s.\n%s%s",
  59                         op->o_req_dn.bv_val, "", "" );
  60
  61         if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  62                 isroot = 1;
  63                 ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
  64         }
  65
  66         /* we need meta_back_getconn() not send result even on error,
  67          * because we want to intercept the error and make it
  68          * invalidCredentials */
  69         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_DONTSEND );
  70         if ( !mc ) {
  71                 Debug( LDAP_DEBUG_ANY,
  72                                 "meta_back_bind: no target "
  73                                 "for dn \"%s\" (%d: %s).\n",
  74                                 op->o_req_dn.bv_val, rs->sr_err,
  75                                 rs->sr_text ? rs->sr_text : "" );
  76                 /* FIXME: there might be cases where we don't want
  77                  * to map the error onto invalidCredentials */
  78                 switch ( rs->sr_err ) {
  79                 case LDAP_NO_SUCH_OBJECT:
  80                 case LDAP_UNWILLING_TO_PERFORM:
  81                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  82                         rs->sr_text = NULL;
  83                         break;
  84                 }
  85                 send_ldap_result( op, rs );
  86                 return rs->sr_err;
  87         }
  88
  89         /*
  90          * Each target is scanned ...
  91          */
  92         mc->mc_auth_target = META_BOUND_NONE;
  93         for ( i = 0; i < mi->mi_ntargets; i++ ) {
  94                 int             lerr;
  95                 Operation       op2 = *op;
  96
  97                 /*
  98                  * Skip non-candidates
  99                  */
 100                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 101                         continue;
 102                 }
 103
 104                 if ( gotit == 0 ) {
 105                         gotit = 1;
 106
 107                 } else if ( isroot == 0 ) {
 108                         /*
 109                          * A bind operation is expected to have
 110                          * ONE CANDIDATE ONLY!
 111                          */
 112                         Debug( LDAP_DEBUG_ANY,
 113                                         "==>meta_back_bind: more than one"
 114                                         " candidate is trying to bind...\n",
 115                                         0, 0, 0 );
 116                 }
 117
 118                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ]->mt_pseudorootdn ) )
 119                 {
 120                         op2.o_req_dn = mi->mi_targets[ i ]->mt_pseudorootdn;
 121                         op2.o_req_ndn = mi->mi_targets[ i ]->mt_pseudorootdn;
 122                         op2.orb_cred = mi->mi_targets[ i ]->mt_pseudorootpw;
 123                         op2.orb_method = LDAP_AUTH_SIMPLE;
 124                 }
 125
 126                 lerr = meta_back_single_bind( &op2, rs, mc, i );
 127                 if ( lerr != LDAP_SUCCESS ) {
 128                         rs->sr_err = lerr;
 129                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 130
 131                 } else {
 132                         rc = LDAP_SUCCESS;
 133                 }
 134         }
 135
 136         if ( isroot ) {
 137                 mc->mc_auth_target = META_BOUND_ALL;
 138         }
 139
 140         /*
 141          * rc is LDAP_SUCCESS if at least one bind succeeded,
 142          * err is the last error that occurred during a bind;
 143          * if at least (and at most?) one bind succeedes, fine.
 144          */
 145         if ( rc != LDAP_SUCCESS ) {
 146
 147                 /*
 148                  * deal with bind failure ...
 149                  */
 150
 151                 /*
 152                  * no target was found within the naming context,
 153                  * so bind must fail with invalid credentials
 154                  */
 155                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 156                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 157                 }
 158
 159                 rs->sr_err = slap_map_api2result( rs );
 160                 send_ldap_result( op, rs );
 161                 return rs->sr_err;
 162         }
 163
 164         return LDAP_SUCCESS;
 165 }
 166
 167 /*
 168  * meta_back_single_bind
 169  *
 170  * attempts to perform a bind with creds
 171  */
 172 static int
 173 meta_back_single_bind(
 174         Operation               *op,
 175         SlapReply               *rs,
 176         metaconn_t              *mc,
 177         int                     candidate )
 178 {
 179         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 180         metatarget_t            *mt = mi->mi_targets[ candidate ];
 181         struct berval           mdn = BER_BVNULL;
 182         dncookie                dc;
 183         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 184         int                     msgid;
 185
 186         /*
 187          * Rewrite the bind dn if needed
 188          */
 189         dc.rwmap = &mi->mi_targets[ candidate ]->mt_rwmap;
 190         dc.conn = op->o_conn;
 191         dc.rs = rs;
 192         dc.ctx = "bindDN";
 193
 194         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 195                 send_ldap_result( op, rs );
 196                 return -1;
 197         }
 198
 199         /* FIXME: this fixes the bind problem right now; we need
 200          * to use the asynchronous version to get the "matched"
 201          * and more in case of failure ... */
 202         /* FIXME: should be check if at least some of the op->o_ctrls
 203          * can/should be passed? */
 204 rebind:;
 205         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 206                         LDAP_SASL_SIMPLE, &op->orb_cred,
 207                         op->o_ctrls, NULL, &msgid );
 208         if ( rs->sr_err == LDAP_SUCCESS ) {
 209                 LDAPMessage     *res;
 210                 struct timeval  tv;
 211                 int             rc;
 212                 int             nretries = mt->mt_nretries;
 213
 214                 /*
 215                  * handle response!!!
 216                  */
 217 retry:;
 218                 tv.tv_sec = 0;
 219                 tv.tv_usec = META_BIND_TIMEOUT;
 220                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 221                 case 0:
 222                         Debug( LDAP_DEBUG_ANY, "%s meta_back_single_bind: ldap_result=%d nretries=%d\n",
 223                                 op->o_log_prefix, 0, nretries );
 224
 225                         if ( nretries != META_RETRY_NEVER ) {
 226                                 ldap_pvt_thread_yield();
 227                                 if ( nretries > 0 ) {
 228                                         nretries--;
 229                                 }
 230                                 goto retry;
 231                         }
 232                         rs->sr_err = LDAP_BUSY;
 233                         break;
 234
 235                 case -1:
 236                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 237                                         &rs->sr_err );
 238
 239                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_bind: err=%d nretries=%d\n",
 240                                 op->o_log_prefix, rs->sr_err, nretries );
 241
 242                         rc = slap_map_api2result( rs );
 243                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 244                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 245                                 msc->msc_ld = NULL;
 246                                 msc->msc_bound = 0;
 247
 248                                 /* mc here must be the regular mc, reset and ready for init */
 249                                 rc = meta_back_init_one_conn( op, rs, mt, msc,
 250                                                 LDAP_BACK_DONTSEND );
 251                                 if ( rc ) {
 252                                         if ( nretries > 0 ) {
 253                                                 nretries--;
 254                                         }
 255                                         ldap_pvt_thread_yield();
 256                                         goto rebind;
 257                                 }
 258                         }
 259                         break;
 260
 261                 default:
 262                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 263                                         NULL, NULL, NULL, NULL, 1 );
 264                         if ( rc != LDAP_SUCCESS ) {
 265                                 rs->sr_err = rc;
 266                         }
 267                         break;
 268                 }
 269         }
 270
 271         if ( rs->sr_err != LDAP_SUCCESS ) {
 272                 rs->sr_err = slap_map_api2result( rs );
 273                 goto return_results;
 274         }
 275
 276         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 277         msc->msc_bound = META_BOUND;
 278         mc->mc_auth_target = candidate;
 279
 280         if ( LDAP_BACK_SAVECRED( mi ) ) {
 281                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 282                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind, msc );
 283         }
 284
 285         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 286                         && op->o_req_ndn.bv_len != 0 )
 287         {
 288                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 289                                 &op->o_req_ndn, candidate );
 290         }
 291
 292 return_results:;
 293         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 294                 free( mdn.bv_val );
 295         }
 296
 297         return rs->sr_err;
 298 }
 299
 300 /*
 301  * meta_back_single_dobind
 302  */
 303 int
 304 meta_back_single_dobind(
 305         Operation               *op,
 306         SlapReply               *rs,
 307         metaconn_t              *mc,
 308         int                     candidate,
 309         ldap_back_send_t        sendok,
 310         int                     nretries )
 311 {
 312         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 313         metatarget_t            *mt = mi->mi_targets[ candidate ];
 314         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 315         int                     rc;
 316         struct berval           cred = BER_BVC( "" );
 317         int                     msgid,
 318                                 rebinding = 0,
 319                                 save_nretries = nretries;
 320
 321         /*
 322          * Otherwise an anonymous bind is performed
 323          * (note: if the target was already bound, the anonymous
 324          * bind clears the previous bind).
 325          */
 326         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 327                 ber_memfree( msc->msc_bound_ndn.bv_val );
 328                 BER_BVZERO( &msc->msc_bound_ndn );
 329         }
 330
 331         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 332                 /* destroy sensitive data */
 333                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 334                 ber_memfree( msc->msc_cred.bv_val );
 335                 BER_BVZERO( &msc->msc_cred );
 336         }
 337
 338         /* FIXME: should we check if at least some of the op->o_ctrls
 339          * can/should be passed? */
 340 rebind:;
 341         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 342                         NULL, NULL, &msgid );
 343         if ( rc == LDAP_SUCCESS ) {
 344                 LDAPMessage     *res;
 345                 struct timeval  tv;
 346
 347                 /*
 348                  * handle response!!!
 349                  */
 350 retry:;
 351                 tv.tv_sec = 0;
 352                 tv.tv_usec = META_BIND_TIMEOUT;
 353                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 354                 case 0:
 355                         Debug( LDAP_DEBUG_ANY, "%s meta_back_single_dobind: ldap_result=%d nretries=%d\n",
 356                                 op->o_log_prefix, 0, nretries );
 357
 358                         if ( nretries != META_RETRY_NEVER ) {
 359                                 ldap_pvt_thread_yield();
 360                                 if ( nretries > 0 ) {
 361                                         nretries--;
 362                                 }
 363                                 goto retry;
 364                         }
 365
 366                         rc = LDAP_BUSY;
 367                         if ( rebinding ) {
 368                                 break;
 369                         }
 370
 371                         /* FIXME: some times the request times out
 372                          * while the other party is not willing to
 373                          * send a response any more.  Give it a second
 374                          * chance with a freshly bound connection */
 375                         rebinding = 1;
 376                         nretries = save_nretries;
 377                         /* fallthru */
 378
 379                 case -1:
 380                         ldap_get_option( msc->msc_ld,
 381                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 382
 383                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_dobind: err=%d nretries=%d\n",
 384                                         op->o_log_prefix, rs->sr_err, nretries );
 385
 386                         rc = slap_map_api2result( rs );
 387                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 388                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 389                                 msc->msc_ld = NULL;
 390                                 msc->msc_bound = 0;
 391
 392                                 /* mc here must be the regular mc, reset and ready for init */
 393                                 rc = meta_back_init_one_conn( op, rs, mt, msc, LDAP_BACK_DONTSEND );
 394
 395                                 if ( rc == LDAP_SUCCESS ) {
 396                                         ldap_pvt_thread_yield();
 397                                         if ( nretries > 0 ) {
 398                                                 nretries--;
 399                                         }
 400                                         goto rebind;
 401                                 }
 402                         }
 403                         break;
 404
 405                 default:
 406                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 407                                         NULL, NULL, NULL, NULL, 1 );
 408                         if ( rc == LDAP_SUCCESS ) {
 409                                 rc = slap_map_api2result( rs );
 410                         }
 411                         break;
 412                 }
 413         }
 414
 415         rs->sr_err = rc;
 416         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 417                 send_ldap_result( op, rs );
 418         }
 419
 420         return rc;
 421 }
 422
 423 /*
 424  * meta_back_dobind
 425  */
 426 int
 427 meta_back_dobind(
 428         Operation               *op,
 429         SlapReply               *rs,
 430         metaconn_t              *mc,
 431         ldap_back_send_t        sendok )
 432 {
 433         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 434
 435         metasingleconn_t        *msc;
 436         int                     bound = 0, i;
 437
 438         SlapReply               *candidates = meta_back_candidates_get( op );
 439
 440         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 441
 442         /*
 443          * all the targets are bound as pseudoroot
 444          */
 445         if ( mc->mc_auth_target == META_BOUND_ALL ) {
 446                 bound = 1;
 447                 goto done;
 448         }
 449
 450         for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 451                 metatarget_t    *mt = mi->mi_targets[ i ];
 452                 int             rc;
 453
 454                 /*
 455                  * Not a candidate or something wrong with this target ...
 456                  */
 457                 if ( msc->msc_ld == NULL ) {
 458                         continue;
 459                 }
 460
 461                 /*
 462                  * If the target is already bound it is skipped
 463                  */
 464                 if ( msc->msc_bound == META_BOUND && mc->mc_auth_target == i ) {
 465                         ++bound;
 466                         continue;
 467                 }
 468
 469                 rc = meta_back_single_dobind( op, rs, mc, i,
 470                                 LDAP_BACK_DONTSEND, mt->mt_nretries );
 471                 if ( rc != LDAP_SUCCESS ) {
 472                         Debug( LDAP_DEBUG_ANY, "%s meta_back_dobind[%d]: "
 473                                         "(anonymous) err=%d\n",
 474                                         op->o_log_prefix, i, rc );
 475
 476                         /*
 477                          * null cred bind should always succeed
 478                          * as anonymous, so a failure means
 479                          * the target is no longer candidate possibly
 480                          * due to technical reasons (remote host down?)
 481                          * so better clear the handle
 482                          */
 483                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 484 #if 0
 485                         ( void )meta_clear_one_candidate( msc );
 486 #endif
 487                         continue;
 488                 } /* else */
 489
 490                 candidates[ i ].sr_tag = META_CANDIDATE;
 491                 msc->msc_bound = META_ANONYMOUS;
 492                 ++bound;
 493         }
 494
 495 done:;
 496         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 497
 498         if ( bound == 0 && sendok & LDAP_BACK_SENDERR ) {
 499                 if ( rs->sr_err == LDAP_SUCCESS ) {
 500                         rs->sr_err = LDAP_BUSY;
 501                 }
 502                 send_ldap_result( op, rs );
 503         }
 504
 505         return( bound > 0 );
 506 }
 507
 508 /*
 509  * meta_back_rebind
 510  *
 511  * This is a callback used for chasing referrals using the same
 512  * credentials as the original user on this session.
 513  */
 514 static int
 515 meta_back_rebind(
 516         LDAP                    *ld,
 517         LDAP_CONST char         *url,
 518         ber_tag_t               request,
 519         ber_int_t               msgid,
 520         void                    *params )
 521 {
 522         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 523
 524         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 525                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 526                         NULL, NULL, NULL );
 527 }
 528
 529 /*
 530  * FIXME: error return must be handled in a cleaner way ...
 531  */
 532 int
 533 meta_back_op_result(
 534         metaconn_t      *mc,
 535         Operation       *op,
 536         SlapReply       *rs,
 537         int             candidate )
 538 {
 539         int                     i,
 540                                 rerr = LDAP_SUCCESS;
 541         metasingleconn_t        *msc;
 542         char                    *rmsg = NULL;
 543         char                    *rmatch = NULL;
 544         int                     free_rmsg = 0,
 545                                 free_rmatch = 0;
 546
 547         if ( candidate != META_TARGET_NONE ) {
 548                 msc = &mc->mc_conns[ candidate ];
 549
 550                 rs->sr_err = LDAP_SUCCESS;
 551
 552                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 553                 if ( rs->sr_err != LDAP_SUCCESS ) {
 554                         /*
 555                          * better check the type of error. In some cases
 556                          * (search ?) it might be better to return a
 557                          * success if at least one of the targets gave
 558                          * positive result ...
 559                          */
 560                         ldap_get_option( msc->msc_ld,
 561                                         LDAP_OPT_ERROR_STRING, &rmsg );
 562                         ldap_get_option( msc->msc_ld,
 563                                         LDAP_OPT_MATCHED_DN, &rmatch );
 564                         rerr = rs->sr_err = slap_map_api2result( rs );
 565
 566                         if ( rmsg ) {
 567                                 free_rmsg = 1;
 568                         }
 569                         if ( rmatch ) {
 570                                 free_rmatch = 1;
 571                         }
 572
 573                         Debug(LDAP_DEBUG_ANY,
 574                                         "==> meta_back_op_result: target"
 575                                         " <%d> sending msg \"%s\""
 576                                         " (matched \"%s\")\n",
 577                                         candidate, ( rmsg ? rmsg : "" ),
 578                                         ( rmatch ? rmatch : "" ) );
 579                 }
 580
 581         } else {
 582                 for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 583                         char    *msg = NULL;
 584                         char    *match = NULL;
 585
 586                         rs->sr_err = LDAP_SUCCESS;
 587
 588                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 589                         if ( rs->sr_err != LDAP_SUCCESS ) {
 590                                 /*
 591                                  * better check the type of error. In some cases
 592                                  * (search ?) it might be better to return a
 593                                  * success if at least one of the targets gave
 594                                  * positive result ...
 595                                  */
 596                                 ldap_get_option( msc->msc_ld,
 597                                                 LDAP_OPT_ERROR_STRING, &msg );
 598                                 ldap_get_option( msc->msc_ld,
 599                                                 LDAP_OPT_MATCHED_DN, &match );
 600                                 rs->sr_err = slap_map_api2result( rs );
 601
 602                                 Debug(LDAP_DEBUG_ANY,
 603                                                 "==> meta_back_op_result: target"
 604                                                 " <%d> sending msg \"%s\""
 605                                                 " (matched \"%s\")\n",
 606                                                 i, ( msg ? msg : "" ),
 607                                                 ( match ? match : "" ) );
 608
 609                                 /*
 610                                  * FIXME: need to rewrite "match" (need rwinfo)
 611                                  */
 612                                 switch ( rs->sr_err ) {
 613                                 default:
 614                                         rerr = rs->sr_err;
 615                                         if ( rmsg ) {
 616                                                 ber_memfree( rmsg );
 617                                         }
 618                                         rmsg = msg;
 619                                         free_rmsg = 1;
 620                                         msg = NULL;
 621                                         if ( rmatch ) {
 622                                                 ber_memfree( rmatch );
 623                                         }
 624                                         rmatch = match;
 625                                         free_rmatch = 1;
 626                                         match = NULL;
 627                                         break;
 628                                 }
 629
 630                                 /* better test the pointers before freeing? */
 631                                 if ( match ) {
 632                                         free( match );
 633                                 }
 634                                 if ( msg ) {
 635                                         free( msg );
 636                                 }
 637                         }
 638                 }
 639         }
 640
 641         rs->sr_err = rerr;
 642         rs->sr_text = rmsg;
 643         rs->sr_matched = rmatch;
 644         send_ldap_result( op, rs );
 645         if ( free_rmsg ) {
 646                 ber_memfree( rmsg );
 647         }
 648         if ( free_rmatch ) {
 649                 ber_memfree( rmatch );
 650         }
 651         rs->sr_text = NULL;
 652         rs->sr_matched = NULL;
 653
 654         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 655 }
 656