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 1999-2006 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/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36
  37 static LDAP_REBIND_PROC meta_back_default_rebind;
  38
  39 /*
  40  * a module could register a replacement for this function
  41  */
  42 LDAP_REBIND_PROC        *meta_back_rebind_f = meta_back_default_rebind;
  43
  44 int
  45 meta_back_bind( Operation *op, SlapReply *rs )
  46 {
  47         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  48         metaconn_t      *mc = NULL;
  49
  50         int             rc = LDAP_OTHER,
  51                         i,
  52                         gotit = 0,
  53                         isroot = 0;
  54
  55         SlapReply       *candidates = meta_back_candidates_get( op );
  56
  57         rs->sr_err = LDAP_SUCCESS;
  58
  59         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  60                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  61
  62         /* the test on the bind method should be superfluous */
  63         if ( op->orb_method == LDAP_AUTH_SIMPLE
  64                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  65         {
  66                 if ( !be_isroot_pw( op ) ) {
  67                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  68                         rs->sr_text = NULL;
  69                         send_ldap_result( op, rs );
  70                         return rs->sr_err;
  71                 }
  72
  73                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  74                         rs->sr_err = LDAP_SUCCESS;
  75                         rs->sr_text = NULL;
  76                         /* frontend will return success */
  77                         return rs->sr_err;
  78                 }
  79
  80                 isroot = 1;
  81         }
  82
  83         /* we need meta_back_getconn() not send result even on error,
  84          * because we want to intercept the error and make it
  85          * invalidCredentials */
  86         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  87         if ( !mc ) {
  88                 char    buf[ SLAP_TEXT_BUFLEN ];
  89
  90                 snprintf( buf, sizeof( buf ),
  91                         "meta_back_bind: no target "
  92                         "for dn \"%s\" (%d%s%s).",
  93                         op->o_req_dn.bv_val, rs->sr_err,
  94                         rs->sr_text ? ". " : "",
  95                         rs->sr_text ? rs->sr_text : "" );
  96                 Debug( LDAP_DEBUG_ANY,
  97                         "%s %s\n",
  98                         op->o_log_prefix, buf, 0 );
  99
 100                 /* FIXME: there might be cases where we don't want
 101                  * to map the error onto invalidCredentials */
 102                 switch ( rs->sr_err ) {
 103                 case LDAP_NO_SUCH_OBJECT:
 104                 case LDAP_UNWILLING_TO_PERFORM:
 105                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 106                         rs->sr_text = NULL;
 107                         break;
 108                 }
 109                 send_ldap_result( op, rs );
 110                 return rs->sr_err;
 111         }
 112
 113         /*
 114          * Each target is scanned ...
 115          */
 116         mc->mc_authz_target = META_BOUND_NONE;
 117         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 118                 int             lerr;
 119                 Operation       op2 = *op;
 120                 int             massage = 1;
 121
 122                 /*
 123                  * Skip non-candidates
 124                  */
 125                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 126                         continue;
 127                 }
 128
 129                 if ( gotit == 0 ) {
 130                         /* set rc to LDAP_SUCCESS only if at least
 131                          * one candidate has been tried */
 132                         rc = LDAP_SUCCESS;
 133                         gotit = 1;
 134
 135                 } else if ( isroot == 0 ) {
 136                         /*
 137                          * A bind operation is expected to have
 138                          * ONE CANDIDATE ONLY!
 139                          */
 140                         Debug( LDAP_DEBUG_ANY,
 141                                 "### %s meta_back_bind: more than one"
 142                                 " candidate selected...\n",
 143                                 op->o_log_prefix, 0, 0 );
 144                 }
 145
 146                 if ( isroot ) {
 147                         if ( BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 148                         {
 149                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 150
 151                                 /* skip the target if no pseudorootdn is provided */
 152                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 153                                         ch_free( msc->msc_bound_ndn.bv_val );
 154                                         BER_BVZERO( &msc->msc_bound_ndn );
 155                                 }
 156
 157                                 if ( LDAP_BACK_SAVECRED( mi ) &&
 158                                         !BER_BVISNULL( &msc->msc_cred ) )
 159                                 {
 160                                         /* destroy sensitive data */
 161                                         memset( msc->msc_cred.bv_val, 0,
 162                                                 msc->msc_cred.bv_len );
 163                                         ch_free( msc->msc_cred.bv_val );
 164                                         BER_BVZERO( &msc->msc_cred );
 165                                 }
 166
 167                                 continue;
 168                         }
 169
 170                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 171                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 172                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 173                         op2.orb_method = LDAP_AUTH_SIMPLE;
 174
 175                         massage = 0;
 176                 }
 177
 178                 lerr = meta_back_single_bind( &op2, rs, mc, i, massage );
 179
 180                 if ( lerr != LDAP_SUCCESS ) {
 181                         rc = rs->sr_err = lerr;
 182                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 183                         break;
 184                 }
 185         }
 186
 187         /* must re-insert if local DN changed as result of bind */
 188         if ( rc == LDAP_SUCCESS ) {
 189                 if ( isroot ) {
 190                         mc->mc_authz_target = META_BOUND_ALL;
 191                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 192                 }
 193
 194                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 195                         int             lerr;
 196
 197                         /* wait for all other ops to release the connection */
 198 retry_lock:;
 199                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 200                         if ( mc->mc_refcnt > 1 ) {
 201                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 202                                 ldap_pvt_thread_yield();
 203                                 goto retry_lock;
 204                         }
 205
 206                         assert( mc->mc_refcnt == 1 );
 207                         mc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 208                                 meta_back_dnconn_cmp );
 209                         assert( mc != NULL );
 210
 211                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 212                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 213                                 meta_back_dnconn_cmp, meta_back_dnconn_dup );
 214                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 215                         if ( lerr == -1 ) {
 216                                 for ( i = 0; i < mi->mi_ntargets; ++i ) {
 217                                         if ( mc->mc_conns[ i ].msc_ld != NULL ) {
 218                                                 meta_clear_one_candidate( &mc->mc_conns[ i ] );
 219                                         }
 220                                 }
 221
 222                                 /* we can do this because mc_refcnt == 1 */
 223                                 mc->mc_refcnt = 0;
 224                                 meta_back_conn_free( mc );
 225                                 mc = NULL;
 226                         }
 227                 }
 228         }
 229
 230         if ( mc != NULL ) {
 231                 meta_back_release_conn( op, mc );
 232         }
 233
 234         /*
 235          * rc is LDAP_SUCCESS if at least one bind succeeded,
 236          * err is the last error that occurred during a bind;
 237          * if at least (and at most?) one bind succeeds, fine.
 238          */
 239         if ( rc != LDAP_SUCCESS ) {
 240
 241                 /*
 242                  * deal with bind failure ...
 243                  */
 244
 245                 /*
 246                  * no target was found within the naming context,
 247                  * so bind must fail with invalid credentials
 248                  */
 249                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 250                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 251                 } else {
 252                         rs->sr_err = slap_map_api2result( rs );
 253                 }
 254                 send_ldap_result( op, rs );
 255                 return rs->sr_err;
 256
 257         }
 258
 259         return LDAP_SUCCESS;
 260 }
 261
 262 /*
 263  * meta_back_single_bind
 264  *
 265  * attempts to perform a bind with creds
 266  */
 267 int
 268 meta_back_single_bind(
 269         Operation               *op,
 270         SlapReply               *rs,
 271         metaconn_t              *mc,
 272         int                     candidate,
 273         int                     massage )
 274 {
 275         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 276         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 277         struct berval           mdn = BER_BVNULL;
 278         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 279         int                     msgid,
 280                                 rebinding = 0;
 281
 282
 283         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 284                 ch_free( msc->msc_bound_ndn.bv_val );
 285                 BER_BVZERO( &msc->msc_bound_ndn );
 286         }
 287
 288         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 289                 /* destroy sensitive data */
 290                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 291                 ch_free( msc->msc_cred.bv_val );
 292                 BER_BVZERO( &msc->msc_cred );
 293         }
 294
 295         /*
 296          * Rewrite the bind dn if needed
 297          */
 298         if ( massage ) {
 299                 dncookie                dc;
 300
 301                 dc.target = mt;
 302                 dc.conn = op->o_conn;
 303                 dc.rs = rs;
 304                 dc.ctx = "bindDN";
 305
 306                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 307                         send_ldap_result( op, rs );
 308                         return -1;
 309                 }
 310
 311         } else {
 312                 mdn = op->o_req_dn;
 313         }
 314
 315         /* FIXME: this fixes the bind problem right now; we need
 316          * to use the asynchronous version to get the "matched"
 317          * and more in case of failure ... */
 318         /* FIXME: should we check if at least some of the op->o_ctrls
 319          * can/should be passed? */
 320 rebind:;
 321         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 322                         LDAP_SASL_SIMPLE, &op->orb_cred,
 323                         op->o_ctrls, NULL, &msgid );
 324         if ( rs->sr_err == LDAP_SUCCESS ) {
 325                 LDAPMessage     *res;
 326                 struct timeval  tv;
 327                 int             rc;
 328                 int             nretries = mt->mt_nretries;
 329                 char            buf[ SLAP_TEXT_BUFLEN ];
 330
 331                 LDAP_BACK_TV_SET( &tv );
 332
 333                 /*
 334                  * handle response!!!
 335                  */
 336 retry:;
 337                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 338                 case 0:
 339                         snprintf( buf, sizeof( buf ),
 340                                 "ldap_result=0 nretries=%d%s",
 341                                 nretries, rebinding ? " rebinding" : "" );
 342                         Debug( LDAP_DEBUG_ANY,
 343                                 "%s meta_back_single_bind[%d]: %s.\n",
 344                                 op->o_log_prefix, candidate, buf );
 345
 346                         if ( nretries != META_RETRY_NEVER ) {
 347                                 ldap_pvt_thread_yield();
 348                                 if ( nretries > 0 ) {
 349                                         nretries--;
 350                                 }
 351                                 tv = mt->mt_bind_timeout;
 352                                 goto retry;
 353                         }
 354
 355                         rs->sr_err = LDAP_BUSY;
 356                         if ( rebinding ) {
 357                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 358                                 break;
 359                         }
 360
 361                         /* FIXME: some times the request times out
 362                          * while the other party is not willing to
 363                          * send a response any more.  Give it a second
 364                          * chance with a freshly bound connection */
 365                         rebinding = 1;
 366                         nretries = mt->mt_nretries;
 367                         /* fallthru */
 368
 369                 case -1:
 370                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 371                                 &rs->sr_err );
 372
 373                         if ( rebinding ) {
 374                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 375                         }
 376
 377                         snprintf( buf, sizeof( buf ),
 378                                 "err=%d nretries=%d",
 379                                 rs->sr_err, nretries );
 380                         Debug( LDAP_DEBUG_ANY,
 381                                 "### %s meta_back_single_bind[%d]: %s.\n",
 382                                 op->o_log_prefix, candidate, buf );
 383
 384                         rc = slap_map_api2result( rs );
 385                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 386                                 rc = meta_back_retry( op, rs, mc, candidate, LDAP_BACK_DONTSEND );
 387                                 if ( rc ) {
 388                                         if ( nretries > 0 ) {
 389                                                 nretries--;
 390                                         }
 391                                         ldap_pvt_thread_yield();
 392                                         goto rebind;
 393                                 }
 394                         }
 395                         break;
 396
 397                 default:
 398                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 399                                         NULL, NULL, NULL, NULL, 1 );
 400                         if ( rc != LDAP_SUCCESS ) {
 401                                 rs->sr_err = rc;
 402                         }
 403                         break;
 404                 }
 405         }
 406
 407         if ( rs->sr_err != LDAP_SUCCESS ) {
 408                 rs->sr_err = slap_map_api2result( rs );
 409                 goto return_results;
 410         }
 411
 412         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 413         LDAP_BACK_CONN_ISBOUND_SET( msc );
 414         mc->mc_authz_target = candidate;
 415
 416         if ( LDAP_BACK_SAVECRED( mi ) ) {
 417                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 418                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind_f, msc );
 419         }
 420
 421         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 422                         && op->o_req_ndn.bv_len != 0 )
 423         {
 424                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 425                                 &op->o_req_ndn, candidate );
 426         }
 427
 428 return_results:;
 429         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 430                 free( mdn.bv_val );
 431         }
 432
 433         return rs->sr_err;
 434 }
 435
 436 /*
 437  * meta_back_single_dobind
 438  */
 439 int
 440 meta_back_single_dobind(
 441         Operation               *op,
 442         SlapReply               *rs,
 443         metaconn_t              *mc,
 444         int                     candidate,
 445         ldap_back_send_t        sendok,
 446         int                     nretries,
 447         int                     dolock )
 448 {
 449         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 450         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 451         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 452         int                     rc;
 453         static struct berval    cred = BER_BVC( "" );
 454         int                     msgid,
 455                                 rebinding = 0,
 456                                 save_nretries = nretries;
 457
 458         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 459
 460         /*
 461          * Otherwise an anonymous bind is performed
 462          * (note: if the target was already bound, the anonymous
 463          * bind clears the previous bind).
 464          */
 465         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 466                 ber_memfree( msc->msc_bound_ndn.bv_val );
 467                 BER_BVZERO( &msc->msc_bound_ndn );
 468         }
 469
 470         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 471                 /* destroy sensitive data */
 472                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 473                 ber_memfree( msc->msc_cred.bv_val );
 474                 BER_BVZERO( &msc->msc_cred );
 475         }
 476
 477         /* FIXME: should we check if at least some of the op->o_ctrls
 478          * can/should be passed? */
 479 rebind:;
 480         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 481                         NULL, NULL, &msgid );
 482         if ( rc == LDAP_SUCCESS ) {
 483                 LDAPMessage     *res;
 484                 struct timeval  tv;
 485                 char            buf[ SLAP_TEXT_BUFLEN ];
 486
 487                 LDAP_BACK_TV_SET( &tv );
 488
 489                 /*
 490                  * handle response!!!
 491                  */
 492 retry:;
 493                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 494                 case 0:
 495                         snprintf( buf, sizeof( buf ),
 496                                 "ldap_result=0 nretries=%d%s",
 497                                 nretries, rebinding ? " rebinding" : "" );
 498                         Debug( LDAP_DEBUG_ANY,
 499                                 "%s meta_back_single_dobind[%d]: %s.\n",
 500                                 op->o_log_prefix, candidate, buf );
 501
 502                         if ( nretries != META_RETRY_NEVER ) {
 503                                 ldap_pvt_thread_yield();
 504                                 if ( nretries > 0 ) {
 505                                         nretries--;
 506                                 }
 507                                 tv = mt->mt_bind_timeout;
 508                                 goto retry;
 509                         }
 510
 511                         rc = LDAP_BUSY;
 512                         if ( rebinding ) {
 513                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 514                                 break;
 515                         }
 516
 517                         /* FIXME: some times the request times out
 518                          * while the other party is not willing to
 519                          * send a response any more.  Give it a second
 520                          * chance with a freshly bound connection */
 521                         rebinding = 1;
 522                         nretries = save_nretries;
 523                         /* fallthru */
 524
 525                 case -1:
 526                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 527                                 &rs->sr_err );
 528
 529                         if ( rebinding ) {
 530                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 531                         }
 532
 533                         snprintf( buf, sizeof( buf ),
 534                                 "err=%d nretries=%d",
 535                                 rs->sr_err, nretries );
 536                         Debug( LDAP_DEBUG_ANY,
 537                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 538                                 op->o_log_prefix, candidate, buf );
 539
 540                         rc = slap_map_api2result( rs );
 541                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 542                                 /* NOTE: we do not use meta_back_retry() here
 543                                  * to avoid circular loops; mc_mutex is set
 544                                  * by the caller */
 545                                 if ( dolock ) {
 546                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 547                                 }
 548
 549                                 if ( mc->mc_refcnt == 1 ) {
 550                                         meta_clear_one_candidate( msc );
 551                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 552
 553                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 554
 555                                         /* mc here must be the regular mc,
 556                                          * reset and ready for init */
 557                                         rc = meta_back_init_one_conn( op, rs,
 558                                                 mt, mc, candidate,
 559                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 560                                                 LDAP_BACK_DONTSEND );
 561
 562                                 } else {
 563                                         /* can't do anything about it */
 564                                         rc = LDAP_UNAVAILABLE;
 565                                 }
 566
 567                                 if ( dolock ) {
 568                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 569                                 }
 570
 571                                 if ( rc == LDAP_SUCCESS ) {
 572                                         ldap_pvt_thread_yield();
 573                                         if ( nretries > 0 ) {
 574                                                 nretries--;
 575                                         }
 576                                         goto rebind;
 577                                 }
 578                         }
 579                         break;
 580
 581                 default:
 582                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 583                                         NULL, NULL, NULL, NULL, 1 );
 584                         if ( rc == LDAP_SUCCESS ) {
 585                                 rc = slap_map_api2result( rs );
 586                         }
 587                         break;
 588                 }
 589
 590         } else {
 591                 rs->sr_err = rc;
 592                 rc = slap_map_api2result( rs );
 593         }
 594
 595         rs->sr_err = rc;
 596         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 597                 send_ldap_result( op, rs );
 598         }
 599
 600         return rc;
 601 }
 602
 603 /*
 604  * meta_back_dobind
 605  */
 606 int
 607 meta_back_dobind(
 608         Operation               *op,
 609         SlapReply               *rs,
 610         metaconn_t              *mc,
 611         ldap_back_send_t        sendok )
 612 {
 613         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 614
 615         int                     bound = 0,
 616                                 i,
 617                                 isroot = 0;
 618
 619         SlapReply               *candidates = meta_back_candidates_get( op );
 620
 621         if ( be_isroot( op ) ) {
 622                 isroot = 1;
 623         }
 624
 625         Debug( LDAP_DEBUG_TRACE,
 626                 "%s meta_back_dobind: conn=%ld%s\n",
 627                 op->o_log_prefix,
 628                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 629                 isroot ? " (isroot)" : "" );
 630
 631         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 632
 633         /*
 634          * all the targets are bound as pseudoroot
 635          */
 636         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 637                 bound = 1;
 638                 goto done;
 639         }
 640
 641         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 642                 metatarget_t            *mt = &mi->mi_targets[ i ];
 643                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 644                 int                     rc, do_retry = 1;
 645                 char                    *rootdn = NULL;
 646
 647                 /*
 648                  * Not a candidate
 649                  */
 650                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 651                         continue;
 652                 }
 653
 654                 assert( msc->msc_ld != NULL );
 655
 656                 /*
 657                  * If the target is already bound it is skipped
 658                  */
 659                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 660                         ++bound;
 661                         continue;
 662                 }
 663
 664 retry:;
 665                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 666                 {
 667                         Operation       op2 = *op;
 668
 669                         op2.o_tag = LDAP_REQ_BIND;
 670                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 671                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 672                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 673                         op2.orb_method = LDAP_AUTH_SIMPLE;
 674
 675                         rootdn = mi->mi_targets[ i ].mt_pseudorootdn.bv_val;
 676
 677                         rc = meta_back_single_bind( &op2, rs, mc, i, 0 );
 678
 679                 } else {
 680                         rc = meta_back_single_dobind( op, rs, mc, i,
 681                                 LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 682                 }
 683
 684                 if ( rc != LDAP_SUCCESS ) {
 685                         char            buf[ SLAP_TEXT_BUFLEN ];
 686
 687                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 688                                 do_retry = 0;
 689                                 if ( meta_back_retry_lock( op, rs, mc, i, LDAP_BACK_DONTSEND, 0 ) ) {
 690                                         goto retry;
 691                                 }
 692                         }
 693
 694                         snprintf( buf, sizeof( buf ),
 695                                 "meta_back_dobind[%d]: (%s) err=%d.",
 696                                 i, rootdn ? rootdn : "anonymous", rc );
 697                         Debug( LDAP_DEBUG_ANY,
 698                                 "%s %s\n",
 699                                 op->o_log_prefix, buf, 0 );
 700
 701                         /*
 702                          * null cred bind should always succeed
 703                          * as anonymous, so a failure means
 704                          * the target is no longer candidate possibly
 705                          * due to technical reasons (remote host down?)
 706                          * so better clear the handle
 707                          */
 708                         /* leave the target candidate, but record the error for later use */
 709                         candidates[ i ].sr_err = rc;
 710                         if ( META_BACK_ONERR_STOP( mi ) ) {
 711                                 bound = 0;
 712                                 goto done;
 713                         }
 714                         continue;
 715                 } /* else */
 716
 717                 Debug( LDAP_DEBUG_TRACE,
 718                         "%s meta_back_dobind[%d]: "
 719                         "(%s)\n",
 720                         op->o_log_prefix, i,
 721                         rootdn ? rootdn : "anonymous" );
 722
 723                 if ( rootdn ) {
 724                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 725                 } else {
 726                         LDAP_BACK_CONN_ISANON_SET( msc );
 727                 }
 728                 ++bound;
 729         }
 730
 731 done:;
 732         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 733
 734         Debug( LDAP_DEBUG_TRACE,
 735                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 736                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 737
 738         if ( bound == 0 ) {
 739                 meta_back_release_conn( op, mc );
 740
 741                 if ( sendok & LDAP_BACK_SENDERR ) {
 742                         if ( rs->sr_err == LDAP_SUCCESS ) {
 743                                 rs->sr_err = LDAP_BUSY;
 744                         }
 745                         send_ldap_result( op, rs );
 746                 }
 747         }
 748
 749         return( bound > 0 );
 750 }
 751
 752 /*
 753  * meta_back_default_rebind
 754  *
 755  * This is a callback used for chasing referrals using the same
 756  * credentials as the original user on this session.
 757  */
 758 static int
 759 meta_back_default_rebind(
 760         LDAP                    *ld,
 761         LDAP_CONST char         *url,
 762         ber_tag_t               request,
 763         ber_int_t               msgid,
 764         void                    *params )
 765 {
 766         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 767
 768         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 769                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 770                         NULL, NULL, NULL );
 771 }
 772
 773 /*
 774  * FIXME: error return must be handled in a cleaner way ...
 775  */
 776 int
 777 meta_back_op_result(
 778         metaconn_t      *mc,
 779         Operation       *op,
 780         SlapReply       *rs,
 781         int             candidate )
 782 {
 783         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 784
 785         int                     i,
 786                                 rerr = LDAP_SUCCESS;
 787         char                    *rmsg = NULL,
 788                                 *rmatch = NULL;
 789         const char              *save_rmsg = NULL,
 790                                 *save_rmatch = NULL;
 791         void                    *rmatch_ctx = NULL;
 792
 793         if ( candidate != META_TARGET_NONE ) {
 794                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 795
 796                 rs->sr_err = LDAP_SUCCESS;
 797
 798                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 799                 if ( rs->sr_err != LDAP_SUCCESS ) {
 800                         /*
 801                          * better check the type of error. In some cases
 802                          * (search ?) it might be better to return a
 803                          * success if at least one of the targets gave
 804                          * positive result ...
 805                          */
 806                         ldap_get_option( msc->msc_ld,
 807                                         LDAP_OPT_ERROR_STRING, &rmsg );
 808                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 809                                 ldap_memfree( rmsg );
 810                                 rmsg = NULL;
 811                         }
 812
 813                         ldap_get_option( msc->msc_ld,
 814                                         LDAP_OPT_MATCHED_DN, &rmatch );
 815                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 816                                 ldap_memfree( rmatch );
 817                                 rmatch = NULL;
 818                         }
 819
 820                         rerr = rs->sr_err = slap_map_api2result( rs );
 821
 822                         Debug(LDAP_DEBUG_ANY,
 823                                         "==> meta_back_op_result: target"
 824                                         " <%d> sending msg \"%s\""
 825                                         " (matched \"%s\")\n",
 826                                         candidate, ( rmsg ? rmsg : "" ),
 827                                         ( rmatch ? rmatch : "" ) );
 828                 }
 829
 830         } else {
 831                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 832                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 833                         char                    *msg = NULL;
 834                         char                    *match = NULL;
 835
 836                         rs->sr_err = LDAP_SUCCESS;
 837
 838                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 839                         if ( rs->sr_err != LDAP_SUCCESS ) {
 840                                 /*
 841                                  * better check the type of error. In some cases
 842                                  * (search ?) it might be better to return a
 843                                  * success if at least one of the targets gave
 844                                  * positive result ...
 845                                  */
 846                                 ldap_get_option( msc->msc_ld,
 847                                                 LDAP_OPT_ERROR_STRING, &msg );
 848                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 849                                         ldap_memfree( msg );
 850                                         msg = NULL;
 851                                 }
 852
 853                                 ldap_get_option( msc->msc_ld,
 854                                                 LDAP_OPT_MATCHED_DN, &match );
 855                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 856                                         ldap_memfree( match );
 857                                         match = NULL;
 858                                 }
 859
 860                                 rs->sr_err = slap_map_api2result( rs );
 861
 862                                 Debug(LDAP_DEBUG_ANY,
 863                                                 "==> meta_back_op_result: target"
 864                                                 " <%d> sending msg \"%s\""
 865                                                 " (matched \"%s\")\n",
 866                                                 i, ( msg ? msg : "" ),
 867                                                 ( match ? match : "" ) );
 868
 869                                 /*
 870                                  * FIXME: need to rewrite "match" (need rwinfo)
 871                                  */
 872                                 switch ( rs->sr_err ) {
 873                                 default:
 874                                         rerr = rs->sr_err;
 875                                         if ( msg != NULL ) {
 876                                                 if ( rmsg ) {
 877                                                         ldap_memfree( rmsg );
 878                                                 }
 879                                                 rmsg = msg;
 880                                                 msg = NULL;
 881                                         }
 882                                         if ( match != NULL ) {
 883                                                 if ( rmatch ) {
 884                                                         ldap_memfree( rmatch );
 885                                                 }
 886                                                 rmatch = match;
 887                                                 match = NULL;
 888                                         }
 889                                         break;
 890                                 }
 891
 892                                 if ( msg ) {
 893                                         ldap_memfree( msg );
 894                                 }
 895
 896                                 if ( match ) {
 897                                         ldap_memfree( match );
 898                                 }
 899                         }
 900                 }
 901         }
 902
 903         rs->sr_err = rerr;
 904         if ( rmsg != NULL ) {
 905                 save_rmsg = rs->sr_text;
 906                 rs->sr_text = rmsg;
 907         }
 908         if ( rmatch != NULL ) {
 909                 struct berval   dn, pdn;
 910
 911                 ber_str2bv( rmatch, 0, 0, &dn );
 912                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 913                         ldap_memfree( rmatch );
 914                         rmatch_ctx = op->o_tmpmemctx;
 915                         rmatch = pdn.bv_val;
 916                 }
 917                 save_rmatch = rs->sr_matched;
 918                 rs->sr_matched = rmatch;
 919         }
 920         send_ldap_result( op, rs );
 921         if ( rmsg != NULL ) {
 922                 ber_memfree( rmsg );
 923                 rs->sr_text = save_rmsg;
 924         }
 925         if ( rmatch != NULL ) {
 926                 ber_memfree_x( rmatch, rmatch_ctx );
 927                 rs->sr_matched = save_rmatch;
 928         }
 929
 930         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 931 }
 932