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