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
  51 int
  52 meta_back_bind( Operation *op, SlapReply *rs )
  53 {
  54         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  55         metaconn_t      *mc = NULL;
  56
  57         int             rc = LDAP_OTHER,
  58                         i,
  59                         gotit = 0,
  60                         isroot = 0;
  61
  62         SlapReply       *candidates = meta_back_candidates_get( op );
  63
  64         rs->sr_err = LDAP_SUCCESS;
  65
  66         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  67                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  68
  69         /* the test on the bind method should be superfluous */
  70         if ( op->orb_method == LDAP_AUTH_SIMPLE
  71                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  72         {
  73                 if ( !be_isroot_pw( op ) ) {
  74                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  75                         rs->sr_text = NULL;
  76                         send_ldap_result( op, rs );
  77                         return rs->sr_err;
  78                 }
  79
  80                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  81                         rs->sr_err = LDAP_SUCCESS;
  82                         rs->sr_text = NULL;
  83                         /* frontend will return success */
  84                         return rs->sr_err;
  85                 }
  86
  87                 isroot = 1;
  88         }
  89
  90         /* we need meta_back_getconn() not send result even on error,
  91          * because we want to intercept the error and make it
  92          * invalidCredentials */
  93         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_DONTSEND );
  94         if ( !mc ) {
  95                 char    buf[ SLAP_TEXT_BUFLEN ];
  96
  97                 snprintf( buf, sizeof( buf ),
  98                         "meta_back_bind: no target "
  99                         "for dn \"%s\" (%d%s%s).",
 100                         op->o_req_dn.bv_val, rs->sr_err,
 101                         rs->sr_text ? ". " : "",
 102                         rs->sr_text ? rs->sr_text : "" );
 103                 Debug( LDAP_DEBUG_ANY,
 104                         "%s %s\n",
 105                         op->o_log_prefix, buf, 0 );
 106
 107                 /* FIXME: there might be cases where we don't want
 108                  * to map the error onto invalidCredentials */
 109                 switch ( rs->sr_err ) {
 110                 case LDAP_NO_SUCH_OBJECT:
 111                 case LDAP_UNWILLING_TO_PERFORM:
 112                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 113                         rs->sr_text = NULL;
 114                         break;
 115                 }
 116                 send_ldap_result( op, rs );
 117                 return rs->sr_err;
 118         }
 119
 120         /*
 121          * Each target is scanned ...
 122          */
 123         mc->mc_authz_target = META_BOUND_NONE;
 124         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 125                 int             lerr;
 126                 Operation       op2 = *op;
 127
 128                 /*
 129                  * Skip non-candidates
 130                  */
 131                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 132                         continue;
 133                 }
 134
 135                 if ( gotit == 0 ) {
 136                         /* set rc to LDAP_SUCCESS only if at least
 137                          * one candidate has been tried */
 138                         rc = LDAP_SUCCESS;
 139                         gotit = 1;
 140
 141                 } else if ( isroot == 0 ) {
 142                         /*
 143                          * A bind operation is expected to have
 144                          * ONE CANDIDATE ONLY!
 145                          */
 146                         Debug( LDAP_DEBUG_ANY,
 147                                 "### %s meta_back_bind: more than one"
 148                                 " candidate is trying to bind...\n",
 149                                 op->o_log_prefix, 0, 0 );
 150                 }
 151
 152                 if ( isroot ) {
 153                         if ( BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 154                         {
 155                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 156
 157                                 /* skip the target if no pseudorootdn is provided */
 158                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 159                                         ch_free( msc->msc_bound_ndn.bv_val );
 160                                         BER_BVZERO( &msc->msc_bound_ndn );
 161                                 }
 162
 163                                 if ( LDAP_BACK_SAVECRED( mi ) &&
 164                                         !BER_BVISNULL( &msc->msc_cred ) )
 165                                 {
 166                                         /* destroy sensitive data */
 167                                         memset( msc->msc_cred.bv_val, 0,
 168                                                 msc->msc_cred.bv_len );
 169                                         ch_free( msc->msc_cred.bv_val );
 170                                         BER_BVZERO( &msc->msc_cred );
 171                                 }
 172
 173                                 continue;
 174                         }
 175
 176                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 177                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 178                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 179                         op2.orb_method = LDAP_AUTH_SIMPLE;
 180                 }
 181
 182                 lerr = meta_back_single_bind( &op2, rs, mc, i );
 183                 if ( lerr != LDAP_SUCCESS ) {
 184                         rs->sr_err = lerr;
 185                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 186
 187                         rc = rs->sr_err;
 188                         break;
 189                 }
 190         }
 191
 192         /* must re-insert if local DN changed as result of bind */
 193         if ( rc == LDAP_SUCCESS ) {
 194                 if ( isroot ) {
 195                         mc->mc_authz_target = META_BOUND_ALL;
 196                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 197                 }
 198
 199                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 200                         int             lerr;
 201
 202                         /* wait for all other ops to release the connection */
 203 retry_lock:;
 204                         ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
 205                         if ( mc->mc_refcnt > 1 ) {
 206                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
 207                                 ldap_pvt_thread_yield();
 208                                 goto retry_lock;
 209                         }
 210
 211                         assert( mc->mc_refcnt == 1 );
 212                         mc = avl_delete( &mi->mi_conntree, (caddr_t)mc,
 213                                 meta_back_conn_cmp );
 214                         assert( mc != NULL );
 215
 216                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 217                         lerr = avl_insert( &mi->mi_conntree, (caddr_t)mc,
 218                                 meta_back_conn_cmp, meta_back_conn_dup );
 219                         ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
 220                         if ( lerr == -1 ) {
 221                                 for ( i = 0; i < mi->mi_ntargets; ++i ) {
 222                                         if ( mc->mc_conns[ i ].msc_ld != NULL ) {
 223                                                 meta_clear_one_candidate( &mc->mc_conns[ i ] );
 224                                         }
 225                                 }
 226
 227                                 /* we can do this because mc_refcnt == 1 */
 228                                 mc->mc_refcnt = 0;
 229                                 meta_back_conn_free( mc );
 230                                 mc = NULL;
 231                         }
 232                 }
 233         }
 234
 235         if ( mc != NULL ) {
 236                 meta_back_release_conn( op, mc );
 237         }
 238
 239         /*
 240          * rc is LDAP_SUCCESS if at least one bind succeeded,
 241          * err is the last error that occurred during a bind;
 242          * if at least (and at most?) one bind succeeds, fine.
 243          */
 244         if ( rc != LDAP_SUCCESS ) {
 245
 246                 /*
 247                  * deal with bind failure ...
 248                  */
 249
 250                 /*
 251                  * no target was found within the naming context,
 252                  * so bind must fail with invalid credentials
 253                  */
 254                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 255                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 256                 } else {
 257                         rs->sr_err = slap_map_api2result( rs );
 258                 }
 259                 send_ldap_result( op, rs );
 260                 return rs->sr_err;
 261
 262         }
 263
 264         return LDAP_SUCCESS;
 265 }
 266
 267 /*
 268  * meta_back_single_bind
 269  *
 270  * attempts to perform a bind with creds
 271  */
 272 static int
 273 meta_back_single_bind(
 274         Operation               *op,
 275         SlapReply               *rs,
 276         metaconn_t              *mc,
 277         int                     candidate )
 278 {
 279         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 280         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 281         struct berval           mdn = BER_BVNULL;
 282         dncookie                dc;
 283         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 284         int                     msgid,
 285                                 rebinding = 0;
 286
 287
 288         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 289                 ch_free( msc->msc_bound_ndn.bv_val );
 290                 BER_BVZERO( &msc->msc_bound_ndn );
 291         }
 292
 293         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 294                 /* destroy sensitive data */
 295                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 296                 ch_free( msc->msc_cred.bv_val );
 297                 BER_BVZERO( &msc->msc_cred );
 298         }
 299
 300         /*
 301          * Rewrite the bind dn if needed
 302          */
 303         dc.target = mt;
 304         dc.conn = op->o_conn;
 305         dc.rs = rs;
 306         dc.ctx = "bindDN";
 307
 308         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 309                 send_ldap_result( op, rs );
 310                 return -1;
 311         }
 312
 313         /* FIXME: this fixes the bind problem right now; we need
 314          * to use the asynchronous version to get the "matched"
 315          * and more in case of failure ... */
 316         /* FIXME: should we check if at least some of the op->o_ctrls
 317          * can/should be passed? */
 318 rebind:;
 319         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 320                         LDAP_SASL_SIMPLE, &op->orb_cred,
 321                         op->o_ctrls, NULL, &msgid );
 322         if ( rs->sr_err == LDAP_SUCCESS ) {
 323                 LDAPMessage     *res;
 324                 struct timeval  tv;
 325                 int             rc;
 326                 int             nretries = mt->mt_nretries;
 327
 328                 LDAP_BACK_TV_SET( &tv );
 329
 330                 /*
 331                  * handle response!!!
 332                  */
 333 retry:;
 334                 tv.tv_sec = 0;
 335                 tv.tv_usec = META_BIND_TIMEOUT;
 336                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 337                 case 0:
 338                         Debug( LDAP_DEBUG_ANY,
 339                                 "%s meta_back_single_bind: "
 340                                 "ldap_result=0 nretries=%d%s\n",
 341                                 op->o_log_prefix, nretries,
 342                                 rebinding ? " rebinding" : "" );
 343
 344                         if ( nretries != META_RETRY_NEVER ) {
 345                                 ldap_pvt_thread_yield();
 346                                 if ( nretries > 0 ) {
 347                                         nretries--;
 348                                 }
 349                                 LDAP_BACK_TV_SET( &tv );
 350                                 goto retry;
 351                         }
 352                         rs->sr_err = LDAP_BUSY;
 353                         if ( rebinding ) {
 354                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 355                                 break;
 356                         }
 357
 358                         /* FIXME: some times the request times out
 359                          * while the other party is not willing to
 360                          * send a response any more.  Give it a second
 361                          * chance with a freshly bound connection */
 362                         rebinding = 1;
 363                         nretries = mt->mt_nretries;
 364                         /* fallthru */
 365
 366                 case -1:
 367                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 368                                         &rs->sr_err );
 369
 370                         if ( rebinding ) {
 371                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 372                         }
 373
 374                         Debug( LDAP_DEBUG_ANY,
 375                                 "### %s meta_back_single_bind: "
 376                                 "err=%d nretries=%d\n",
 377                                 op->o_log_prefix, rs->sr_err, nretries );
 378
 379                         rc = slap_map_api2result( rs );
 380                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 381                                 ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
 382                                 if ( mc->mc_refcnt == 1 ) {
 383                                         meta_clear_one_candidate( msc );
 384                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 385
 386                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 387
 388                                         /* mc here must be the regular mc,
 389                                          * reset and ready for init */
 390                                         rc = meta_back_init_one_conn( op, rs,
 391                                                 mt, mc, msc, LDAP_BACK_CONN_ISPRIV( mc ),
 392                                                 candidate == mc->mc_authz_target,
 393                                                 LDAP_BACK_DONTSEND );
 394
 395                                 } else {
 396                                         /* can't do anything about it */
 397                                         rc = 0;
 398                                 }
 399
 400                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
 401
 402                                 if ( rc ) {
 403                                         if ( nretries > 0 ) {
 404                                                 nretries--;
 405                                         }
 406                                         ldap_pvt_thread_yield();
 407                                         goto rebind;
 408                                 }
 409                         }
 410                         break;
 411
 412                 default:
 413                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 414                                         NULL, NULL, NULL, NULL, 1 );
 415                         if ( rc != LDAP_SUCCESS ) {
 416                                 rs->sr_err = rc;
 417                         }
 418                         break;
 419                 }
 420         }
 421
 422         if ( rs->sr_err != LDAP_SUCCESS ) {
 423                 rs->sr_err = slap_map_api2result( rs );
 424                 goto return_results;
 425         }
 426
 427         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 428         LDAP_BACK_CONN_ISBOUND_SET( msc );
 429         mc->mc_authz_target = candidate;
 430
 431         if ( LDAP_BACK_SAVECRED( mi ) ) {
 432                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 433                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind_f, msc );
 434         }
 435
 436         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 437                         && op->o_req_ndn.bv_len != 0 )
 438         {
 439                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 440                                 &op->o_req_ndn, candidate );
 441         }
 442
 443 return_results:;
 444         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 445                 free( mdn.bv_val );
 446         }
 447
 448         return rs->sr_err;
 449 }
 450
 451 /*
 452  * meta_back_single_dobind
 453  */
 454 int
 455 meta_back_single_dobind(
 456         Operation               *op,
 457         SlapReply               *rs,
 458         metaconn_t              *mc,
 459         int                     candidate,
 460         ldap_back_send_t        sendok,
 461         int                     nretries,
 462         int                     dolock )
 463 {
 464         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 465         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 466         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 467         int                     rc;
 468         static struct berval    cred = BER_BVC( "" );
 469         int                     msgid,
 470                                 rebinding = 0,
 471                                 save_nretries = nretries;
 472
 473         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 474
 475         /*
 476          * Otherwise an anonymous bind is performed
 477          * (note: if the target was already bound, the anonymous
 478          * bind clears the previous bind).
 479          */
 480         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 481                 ber_memfree( msc->msc_bound_ndn.bv_val );
 482                 BER_BVZERO( &msc->msc_bound_ndn );
 483         }
 484
 485         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 486                 /* destroy sensitive data */
 487                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 488                 ber_memfree( msc->msc_cred.bv_val );
 489                 BER_BVZERO( &msc->msc_cred );
 490         }
 491
 492         /* FIXME: should we check if at least some of the op->o_ctrls
 493          * can/should be passed? */
 494 rebind:;
 495         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 496                         NULL, NULL, &msgid );
 497         if ( rc == LDAP_SUCCESS ) {
 498                 LDAPMessage     *res;
 499                 struct timeval  tv;
 500
 501                 LDAP_BACK_TV_SET( &tv );
 502
 503                 /*
 504                  * handle response!!!
 505                  */
 506 retry:;
 507                 tv.tv_sec = 0;
 508                 tv.tv_usec = META_BIND_TIMEOUT;
 509                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 510                 case 0:
 511                         Debug( LDAP_DEBUG_ANY,
 512                                 "%s meta_back_single_dobind: "
 513                                 "ldap_result=0 nretries=%d%s\n",
 514                                 op->o_log_prefix, nretries,
 515                                 rebinding ? " rebinding" : "" );
 516
 517                         if ( nretries != META_RETRY_NEVER ) {
 518                                 ldap_pvt_thread_yield();
 519                                 if ( nretries > 0 ) {
 520                                         nretries--;
 521                                 }
 522                                 LDAP_BACK_TV_SET( &tv );
 523                                 goto retry;
 524                         }
 525
 526                         rc = LDAP_BUSY;
 527                         if ( rebinding ) {
 528                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 529                                 break;
 530                         }
 531
 532                         /* FIXME: some times the request times out
 533                          * while the other party is not willing to
 534                          * send a response any more.  Give it a second
 535                          * chance with a freshly bound connection */
 536                         rebinding = 1;
 537                         nretries = save_nretries;
 538                         /* fallthru */
 539
 540                 case -1:
 541                         ldap_get_option( msc->msc_ld,
 542                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 543
 544                         if ( rebinding ) {
 545                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 546                         }
 547
 548                         Debug( LDAP_DEBUG_ANY,
 549                                 "### %s meta_back_single_dobind: "
 550                                 "err=%d nretries=%d\n",
 551                                 op->o_log_prefix, rs->sr_err, nretries );
 552
 553                         rc = slap_map_api2result( rs );
 554                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 555                                 if ( dolock ) {
 556                                         ldap_pvt_thread_mutex_lock( &mi->mi_conn_mutex );
 557                                 }
 558
 559                                 if ( mc->mc_refcnt == 1 ) {
 560                                         meta_clear_one_candidate( msc );
 561                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 562
 563                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 564
 565                                         /* mc here must be the regular mc,
 566                                          * reset and ready for init */
 567                                         rc = meta_back_init_one_conn( op, rs,
 568                                                 mt, mc, msc,
 569                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 570                                                 candidate == mc->mc_authz_target,
 571                                                 LDAP_BACK_DONTSEND );
 572
 573
 574                                 } else {
 575                                         /* can't do anything about it */
 576                                         rc = LDAP_UNAVAILABLE;
 577                                 }
 578
 579                                 if ( dolock ) {
 580                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conn_mutex );
 581                                 }
 582
 583                                 if ( rc == LDAP_SUCCESS ) {
 584                                         ldap_pvt_thread_yield();
 585                                         if ( nretries > 0 ) {
 586                                                 nretries--;
 587                                         }
 588                                         goto rebind;
 589                                 }
 590                         }
 591                         break;
 592
 593                 default:
 594                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 595                                         NULL, NULL, NULL, NULL, 1 );
 596                         if ( rc == LDAP_SUCCESS ) {
 597                                 rc = slap_map_api2result( rs );
 598                         }
 599                         break;
 600                 }
 601
 602         } else {
 603                 rs->sr_err = rc;
 604                 rc = slap_map_api2result( rs );
 605         }
 606
 607         rs->sr_err = rc;
 608         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 609                 send_ldap_result( op, rs );
 610         }
 611
 612         return rc;
 613 }
 614
 615 /*
 616  * meta_back_dobind
 617  */
 618 int
 619 meta_back_dobind(
 620         Operation               *op,
 621         SlapReply               *rs,
 622         metaconn_t              *mc,
 623         ldap_back_send_t        sendok )
 624 {
 625         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 626
 627         int                     bound = 0,
 628                                 i,
 629                                 isroot = 0;
 630
 631         SlapReply               *candidates = meta_back_candidates_get( op );
 632
 633         if ( be_isroot( op ) ) {
 634                 isroot = 1;
 635         }
 636
 637         Debug( LDAP_DEBUG_TRACE,
 638                 "%s meta_back_dobind: conn=%ld%s\n",
 639                 op->o_log_prefix,
 640                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 641                 isroot ? " (isroot)" : "" );
 642
 643         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 644
 645         /*
 646          * all the targets are bound as pseudoroot
 647          */
 648         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 649                 bound = 1;
 650                 goto done;
 651         }
 652
 653         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 654                 metatarget_t            *mt = &mi->mi_targets[ i ];
 655                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 656                 int                     rc;
 657                 char                    *rootdn = NULL;
 658
 659                 /*
 660                  * Not a candidate
 661                  */
 662                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 663                         continue;
 664                 }
 665
 666                 assert( msc->msc_ld != NULL );
 667
 668                 /*
 669                  * If the target is already bound it is skipped
 670                  */
 671                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 672                         ++bound;
 673                         continue;
 674                 }
 675
 676                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 677                 {
 678                         Operation       op2 = *op;
 679
 680                         op2.o_tag = LDAP_REQ_BIND;
 681                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 682                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 683                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 684                         op2.orb_method = LDAP_AUTH_SIMPLE;
 685
 686                         rootdn = mi->mi_targets[ i ].mt_pseudorootdn.bv_val;
 687
 688                         rc = meta_back_single_bind( &op2, rs, mc, i );
 689
 690                 } else {
 691                         rc = meta_back_single_dobind( op, rs, mc, i,
 692                                 LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 693                 }
 694
 695                 if ( rc != LDAP_SUCCESS ) {
 696                         char            buf[ SLAP_TEXT_BUFLEN ];
 697
 698                         snprintf( buf, sizeof( buf ),
 699                                 "meta_back_dobind[%d]: (%s) err=%d.",
 700                                 i, rootdn ? rootdn : "anonymous", rc );
 701                         Debug( LDAP_DEBUG_ANY,
 702                                 "%s %s\n",
 703                                 op->o_log_prefix, buf, 0 );
 704
 705                         /*
 706                          * null cred bind should always succeed
 707                          * as anonymous, so a failure means
 708                          * the target is no longer candidate possibly
 709                          * due to technical reasons (remote host down?)
 710                          * so better clear the handle
 711                          */
 712                         /* leave the target candidate, but record the error for later use */
 713                         candidates[ i ].sr_err = rc;
 714                         if ( META_BACK_ONERR_STOP( mi ) ) {
 715                                 bound = 0;
 716                                 goto done;
 717                         }
 718                         continue;
 719                 } /* else */
 720
 721                 Debug( LDAP_DEBUG_TRACE,
 722                         "%s meta_back_dobind[%d]: "
 723                         "(%s)\n",
 724                         op->o_log_prefix, i,
 725                         rootdn ? rootdn : "anonymous" );
 726
 727                 if ( rootdn ) {
 728                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 729                 } else {
 730                         LDAP_BACK_CONN_ISANON_SET( msc );
 731                 }
 732                 ++bound;
 733         }
 734
 735 done:;
 736         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 737
 738         Debug( LDAP_DEBUG_TRACE,
 739                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 740                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 741
 742         if ( bound == 0 ) {
 743                 meta_back_release_conn( op, mc );
 744
 745                 if ( sendok & LDAP_BACK_SENDERR ) {
 746                         if ( rs->sr_err == LDAP_SUCCESS ) {
 747                                 rs->sr_err = LDAP_BUSY;
 748                         }
 749                         send_ldap_result( op, rs );
 750                 }
 751         }
 752
 753         return( bound > 0 );
 754 }
 755
 756 /*
 757  * meta_back_default_rebind
 758  *
 759  * This is a callback used for chasing referrals using the same
 760  * credentials as the original user on this session.
 761  */
 762 static int
 763 meta_back_default_rebind(
 764         LDAP                    *ld,
 765         LDAP_CONST char         *url,
 766         ber_tag_t               request,
 767         ber_int_t               msgid,
 768         void                    *params )
 769 {
 770         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 771
 772         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 773                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 774                         NULL, NULL, NULL );
 775 }
 776
 777 /*
 778  * FIXME: error return must be handled in a cleaner way ...
 779  */
 780 int
 781 meta_back_op_result(
 782         metaconn_t      *mc,
 783         Operation       *op,
 784         SlapReply       *rs,
 785         int             candidate )
 786 {
 787         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 788
 789         int                     i,
 790                                 rerr = LDAP_SUCCESS;
 791         char                    *rmsg = NULL,
 792                                 *rmatch = NULL;
 793         const char              *save_rmsg = NULL,
 794                                 *save_rmatch = NULL;
 795         void                    *rmatch_ctx = NULL;
 796
 797         if ( candidate != META_TARGET_NONE ) {
 798                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 799
 800                 rs->sr_err = LDAP_SUCCESS;
 801
 802                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 803                 if ( rs->sr_err != LDAP_SUCCESS ) {
 804                         /*
 805                          * better check the type of error. In some cases
 806                          * (search ?) it might be better to return a
 807                          * success if at least one of the targets gave
 808                          * positive result ...
 809                          */
 810                         ldap_get_option( msc->msc_ld,
 811                                         LDAP_OPT_ERROR_STRING, &rmsg );
 812                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 813                                 ldap_memfree( rmsg );
 814                                 rmsg = NULL;
 815                         }
 816
 817                         ldap_get_option( msc->msc_ld,
 818                                         LDAP_OPT_MATCHED_DN, &rmatch );
 819                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 820                                 ldap_memfree( rmatch );
 821                                 rmatch = NULL;
 822                         }
 823
 824                         rerr = rs->sr_err = slap_map_api2result( rs );
 825
 826                         Debug(LDAP_DEBUG_ANY,
 827                                         "==> meta_back_op_result: target"
 828                                         " <%d> sending msg \"%s\""
 829                                         " (matched \"%s\")\n",
 830                                         candidate, ( rmsg ? rmsg : "" ),
 831                                         ( rmatch ? rmatch : "" ) );
 832                 }
 833
 834         } else {
 835                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 836                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 837                         char                    *msg = NULL;
 838                         char                    *match = NULL;
 839
 840                         rs->sr_err = LDAP_SUCCESS;
 841
 842                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 843                         if ( rs->sr_err != LDAP_SUCCESS ) {
 844                                 /*
 845                                  * better check the type of error. In some cases
 846                                  * (search ?) it might be better to return a
 847                                  * success if at least one of the targets gave
 848                                  * positive result ...
 849                                  */
 850                                 ldap_get_option( msc->msc_ld,
 851                                                 LDAP_OPT_ERROR_STRING, &msg );
 852                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 853                                         ldap_memfree( msg );
 854                                         msg = NULL;
 855                                 }
 856
 857                                 ldap_get_option( msc->msc_ld,
 858                                                 LDAP_OPT_MATCHED_DN, &match );
 859                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 860                                         ldap_memfree( match );
 861                                         match = NULL;
 862                                 }
 863
 864                                 rs->sr_err = slap_map_api2result( rs );
 865
 866                                 Debug(LDAP_DEBUG_ANY,
 867                                                 "==> meta_back_op_result: target"
 868                                                 " <%d> sending msg \"%s\""
 869                                                 " (matched \"%s\")\n",
 870                                                 i, ( msg ? msg : "" ),
 871                                                 ( match ? match : "" ) );
 872
 873                                 /*
 874                                  * FIXME: need to rewrite "match" (need rwinfo)
 875                                  */
 876                                 switch ( rs->sr_err ) {
 877                                 default:
 878                                         rerr = rs->sr_err;
 879                                         if ( msg != NULL ) {
 880                                                 if ( rmsg ) {
 881                                                         ldap_memfree( rmsg );
 882                                                 }
 883                                                 rmsg = msg;
 884                                                 msg = NULL;
 885                                         }
 886                                         if ( match != NULL ) {
 887                                                 if ( rmatch ) {
 888                                                         ldap_memfree( rmatch );
 889                                                 }
 890                                                 rmatch = match;
 891                                                 match = NULL;
 892                                         }
 893                                         break;
 894                                 }
 895
 896                                 if ( msg ) {
 897                                         ldap_memfree( msg );
 898                                 }
 899
 900                                 if ( match ) {
 901                                         ldap_memfree( match );
 902                                 }
 903                         }
 904                 }
 905         }
 906
 907         rs->sr_err = rerr;
 908         if ( rmsg != NULL ) {
 909                 save_rmsg = rs->sr_text;
 910                 rs->sr_text = rmsg;
 911         }
 912         if ( rmatch != NULL ) {
 913                 struct berval   dn, pdn;
 914
 915                 ber_str2bv( rmatch, 0, 0, &dn );
 916                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 917                         ldap_memfree( rmatch );
 918                         rmatch_ctx = op->o_tmpmemctx;
 919                         rmatch = pdn.bv_val;
 920                 }
 921                 save_rmatch = rs->sr_matched;
 922                 rs->sr_matched = rmatch;
 923         }
 924         send_ldap_result( op, rs );
 925         if ( rmsg != NULL ) {
 926                 ber_memfree( rmsg );
 927                 rs->sr_text = save_rmsg;
 928         }
 929         if ( rmatch != NULL ) {
 930                 ber_memfree_x( rmatch, rmatch_ctx );
 931                 rs->sr_matched = save_rmatch;
 932         }
 933
 934         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 935 }
 936