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 selected...\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                 char            buf[ SLAP_TEXT_BUFLEN ];
 338
 339                 LDAP_BACK_TV_SET( &tv );
 340
 341                 /*
 342                  * handle response!!!
 343                  */
 344 retry:;
 345                 tv.tv_sec = 0;
 346                 tv.tv_usec = META_BIND_TIMEOUT;
 347                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 348                 case 0:
 349                         snprintf( buf, sizeof( buf ),
 350                                 "ldap_result=0 nretries=%d%s\n",
 351                                 nretries, rebinding ? " rebinding" : "" );
 352                         Debug( LDAP_DEBUG_ANY,
 353                                 "%s meta_back_single_bind[%d]: %s.\n",
 354                                 op->o_log_prefix, candidate, buf );
 355
 356                         if ( nretries != META_RETRY_NEVER ) {
 357                                 ldap_pvt_thread_yield();
 358                                 if ( nretries > 0 ) {
 359                                         nretries--;
 360                                 }
 361                                 LDAP_BACK_TV_SET( &tv );
 362                                 goto retry;
 363                         }
 364                         rs->sr_err = LDAP_BUSY;
 365                         if ( rebinding ) {
 366                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 367                                 break;
 368                         }
 369
 370                         /* FIXME: some times the request times out
 371                          * while the other party is not willing to
 372                          * send a response any more.  Give it a second
 373                          * chance with a freshly bound connection */
 374                         rebinding = 1;
 375                         nretries = mt->mt_nretries;
 376                         /* fallthru */
 377
 378                 case -1:
 379                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 380                                         &rs->sr_err );
 381
 382                         if ( rebinding ) {
 383                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 384                         }
 385
 386                         snprintf( buf, sizeof( buf ),
 387                                 "err=%d nretries=%d",
 388                                 rs->sr_err, nretries );
 389                         Debug( LDAP_DEBUG_ANY,
 390                                 "### %s meta_back_single_bind[%d]: %s.\n",
 391                                 op->o_log_prefix, candidate, buf );
 392
 393                         rc = slap_map_api2result( rs );
 394                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 395                                 rc = meta_back_retry( op, rs, mc, candidate, LDAP_BACK_DONTSEND );
 396                                 if ( rc ) {
 397                                         if ( nretries > 0 ) {
 398                                                 nretries--;
 399                                         }
 400                                         ldap_pvt_thread_yield();
 401                                         goto rebind;
 402                                 }
 403                         }
 404                         break;
 405
 406                 default:
 407                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 408                                         NULL, NULL, NULL, NULL, 1 );
 409                         if ( rc != LDAP_SUCCESS ) {
 410                                 rs->sr_err = rc;
 411                         }
 412                         break;
 413                 }
 414         }
 415
 416         if ( rs->sr_err != LDAP_SUCCESS ) {
 417                 rs->sr_err = slap_map_api2result( rs );
 418                 goto return_results;
 419         }
 420
 421         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 422         LDAP_BACK_CONN_ISBOUND_SET( msc );
 423         mc->mc_authz_target = candidate;
 424
 425         if ( LDAP_BACK_SAVECRED( mi ) ) {
 426                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 427                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind_f, msc );
 428         }
 429
 430         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 431                         && op->o_req_ndn.bv_len != 0 )
 432         {
 433                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 434                                 &op->o_req_ndn, candidate );
 435         }
 436
 437 return_results:;
 438         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 439                 free( mdn.bv_val );
 440         }
 441
 442         return rs->sr_err;
 443 }
 444
 445 /*
 446  * meta_back_single_dobind
 447  */
 448 int
 449 meta_back_single_dobind(
 450         Operation               *op,
 451         SlapReply               *rs,
 452         metaconn_t              *mc,
 453         int                     candidate,
 454         ldap_back_send_t        sendok,
 455         int                     nretries,
 456         int                     dolock )
 457 {
 458         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 459         metatarget_t            *mt = &mi->mi_targets[ candidate ];
 460         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 461         int                     rc;
 462         static struct berval    cred = BER_BVC( "" );
 463         int                     msgid,
 464                                 rebinding = 0,
 465                                 save_nretries = nretries;
 466
 467         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 468
 469         /*
 470          * Otherwise an anonymous bind is performed
 471          * (note: if the target was already bound, the anonymous
 472          * bind clears the previous bind).
 473          */
 474         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 475                 ber_memfree( msc->msc_bound_ndn.bv_val );
 476                 BER_BVZERO( &msc->msc_bound_ndn );
 477         }
 478
 479         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 480                 /* destroy sensitive data */
 481                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 482                 ber_memfree( msc->msc_cred.bv_val );
 483                 BER_BVZERO( &msc->msc_cred );
 484         }
 485
 486         /* FIXME: should we check if at least some of the op->o_ctrls
 487          * can/should be passed? */
 488 rebind:;
 489         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 490                         NULL, NULL, &msgid );
 491         if ( rc == LDAP_SUCCESS ) {
 492                 LDAPMessage     *res;
 493                 struct timeval  tv;
 494                 char            buf[ SLAP_TEXT_BUFLEN ];
 495
 496                 LDAP_BACK_TV_SET( &tv );
 497
 498                 /*
 499                  * handle response!!!
 500                  */
 501 retry:;
 502                 tv.tv_sec = 0;
 503                 tv.tv_usec = META_BIND_TIMEOUT;
 504                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 505                 case 0:
 506                         snprintf( buf, sizeof( buf ),
 507                                 "ldap_result=0 nretries=%d%s",
 508                                 nretries, rebinding ? " rebinding" : "" );
 509                         Debug( LDAP_DEBUG_ANY,
 510                                 "%s meta_back_single_dobind[%d]: %s.\n",
 511                                 op->o_log_prefix, candidate, buf );
 512
 513                         if ( nretries != META_RETRY_NEVER ) {
 514                                 ldap_pvt_thread_yield();
 515                                 if ( nretries > 0 ) {
 516                                         nretries--;
 517                                 }
 518                                 LDAP_BACK_TV_SET( &tv );
 519                                 goto retry;
 520                         }
 521
 522                         rc = LDAP_BUSY;
 523                         if ( rebinding ) {
 524                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 525                                 break;
 526                         }
 527
 528                         /* FIXME: some times the request times out
 529                          * while the other party is not willing to
 530                          * send a response any more.  Give it a second
 531                          * chance with a freshly bound connection */
 532                         rebinding = 1;
 533                         nretries = save_nretries;
 534                         /* fallthru */
 535
 536                 case -1:
 537                         ldap_get_option( msc->msc_ld,
 538                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 539
 540                         if ( rebinding ) {
 541                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 542                         }
 543
 544                         snprintf( buf, sizeof( buf ),
 545                                 "err=%d nretries=%d",
 546                                 rs->sr_err, nretries );
 547                         Debug( LDAP_DEBUG_ANY,
 548                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 549                                 op->o_log_prefix, candidate, buf );
 550
 551                         rc = slap_map_api2result( rs );
 552                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 553                                 /* NOTE: we do not use meta_back_retry() here
 554                                  * to avoid circular loops; mc_mutex is set
 555                                  * by the caller */
 556                                 if ( dolock ) {
 557                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 558                                 }
 559
 560                                 if ( mc->mc_refcnt == 1 ) {
 561                                         meta_clear_one_candidate( msc );
 562                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 563
 564                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 565
 566                                         /* mc here must be the regular mc,
 567                                          * reset and ready for init */
 568                                         rc = meta_back_init_one_conn( op, rs,
 569                                                 mt, mc, candidate,
 570                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 571                                                 LDAP_BACK_DONTSEND );
 572
 573                                 } else {
 574                                         /* can't do anything about it */
 575                                         rc = LDAP_UNAVAILABLE;
 576                                 }
 577
 578                                 if ( dolock ) {
 579                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 580                                 }
 581
 582                                 if ( rc == LDAP_SUCCESS ) {
 583                                         ldap_pvt_thread_yield();
 584                                         if ( nretries > 0 ) {
 585                                                 nretries--;
 586                                         }
 587                                         goto rebind;
 588                                 }
 589                         }
 590                         break;
 591
 592                 default:
 593                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 594                                         NULL, NULL, NULL, NULL, 1 );
 595                         if ( rc == LDAP_SUCCESS ) {
 596                                 rc = slap_map_api2result( rs );
 597                         }
 598                         break;
 599                 }
 600
 601         } else {
 602                 rs->sr_err = rc;
 603                 rc = slap_map_api2result( rs );
 604         }
 605
 606         rs->sr_err = rc;
 607         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 608                 send_ldap_result( op, rs );
 609         }
 610
 611         return rc;
 612 }
 613
 614 /*
 615  * meta_back_dobind
 616  */
 617 int
 618 meta_back_dobind(
 619         Operation               *op,
 620         SlapReply               *rs,
 621         metaconn_t              *mc,
 622         ldap_back_send_t        sendok )
 623 {
 624         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 625
 626         int                     bound = 0,
 627                                 i,
 628                                 isroot = 0;
 629
 630         SlapReply               *candidates = meta_back_candidates_get( op );
 631
 632         if ( be_isroot( op ) ) {
 633                 isroot = 1;
 634         }
 635
 636         Debug( LDAP_DEBUG_TRACE,
 637                 "%s meta_back_dobind: conn=%ld%s\n",
 638                 op->o_log_prefix,
 639                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 640                 isroot ? " (isroot)" : "" );
 641
 642         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 643
 644         /*
 645          * all the targets are bound as pseudoroot
 646          */
 647         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 648                 bound = 1;
 649                 goto done;
 650         }
 651
 652         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 653                 metatarget_t            *mt = &mi->mi_targets[ i ];
 654                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 655                 int                     rc;
 656                 char                    *rootdn = NULL;
 657
 658                 /*
 659                  * Not a candidate
 660                  */
 661                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 662                         continue;
 663                 }
 664
 665                 assert( msc->msc_ld != NULL );
 666
 667                 /*
 668                  * If the target is already bound it is skipped
 669                  */
 670                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 671                         ++bound;
 672                         continue;
 673                 }
 674
 675                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ].mt_pseudorootdn ) )
 676                 {
 677                         Operation       op2 = *op;
 678
 679                         op2.o_tag = LDAP_REQ_BIND;
 680                         op2.o_req_dn = mi->mi_targets[ i ].mt_pseudorootdn;
 681                         op2.o_req_ndn = mi->mi_targets[ i ].mt_pseudorootdn;
 682                         op2.orb_cred = mi->mi_targets[ i ].mt_pseudorootpw;
 683                         op2.orb_method = LDAP_AUTH_SIMPLE;
 684
 685                         rootdn = mi->mi_targets[ i ].mt_pseudorootdn.bv_val;
 686
 687                         rc = meta_back_single_bind( &op2, rs, mc, i, 0 );
 688
 689                 } else {
 690                         rc = meta_back_single_dobind( op, rs, mc, i,
 691                                 LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 692                 }
 693
 694                 if ( rc != LDAP_SUCCESS ) {
 695                         char            buf[ SLAP_TEXT_BUFLEN ];
 696
 697                         snprintf( buf, sizeof( buf ),
 698                                 "meta_back_dobind[%d]: (%s) err=%d.",
 699                                 i, rootdn ? rootdn : "anonymous", rc );
 700                         Debug( LDAP_DEBUG_ANY,
 701                                 "%s %s\n",
 702                                 op->o_log_prefix, buf, 0 );
 703
 704                         /*
 705                          * null cred bind should always succeed
 706                          * as anonymous, so a failure means
 707                          * the target is no longer candidate possibly
 708                          * due to technical reasons (remote host down?)
 709                          * so better clear the handle
 710                          */
 711                         /* leave the target candidate, but record the error for later use */
 712                         candidates[ i ].sr_err = rc;
 713                         if ( META_BACK_ONERR_STOP( mi ) ) {
 714                                 bound = 0;
 715                                 goto done;
 716                         }
 717                         continue;
 718                 } /* else */
 719
 720                 Debug( LDAP_DEBUG_TRACE,
 721                         "%s meta_back_dobind[%d]: "
 722                         "(%s)\n",
 723                         op->o_log_prefix, i,
 724                         rootdn ? rootdn : "anonymous" );
 725
 726                 if ( rootdn ) {
 727                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 728                 } else {
 729                         LDAP_BACK_CONN_ISANON_SET( msc );
 730                 }
 731                 ++bound;
 732         }
 733
 734 done:;
 735         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 736
 737         Debug( LDAP_DEBUG_TRACE,
 738                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 739                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 740
 741         if ( bound == 0 ) {
 742                 meta_back_release_conn( op, mc );
 743
 744                 if ( sendok & LDAP_BACK_SENDERR ) {
 745                         if ( rs->sr_err == LDAP_SUCCESS ) {
 746                                 rs->sr_err = LDAP_BUSY;
 747                         }
 748                         send_ldap_result( op, rs );
 749                 }
 750         }
 751
 752         return( bound > 0 );
 753 }
 754
 755 /*
 756  * meta_back_default_rebind
 757  *
 758  * This is a callback used for chasing referrals using the same
 759  * credentials as the original user on this session.
 760  */
 761 static int
 762 meta_back_default_rebind(
 763         LDAP                    *ld,
 764         LDAP_CONST char         *url,
 765         ber_tag_t               request,
 766         ber_int_t               msgid,
 767         void                    *params )
 768 {
 769         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 770
 771         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 772                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 773                         NULL, NULL, NULL );
 774 }
 775
 776 /*
 777  * FIXME: error return must be handled in a cleaner way ...
 778  */
 779 int
 780 meta_back_op_result(
 781         metaconn_t      *mc,
 782         Operation       *op,
 783         SlapReply       *rs,
 784         int             candidate )
 785 {
 786         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 787
 788         int                     i,
 789                                 rerr = LDAP_SUCCESS;
 790         char                    *rmsg = NULL,
 791                                 *rmatch = NULL;
 792         const char              *save_rmsg = NULL,
 793                                 *save_rmatch = NULL;
 794         void                    *rmatch_ctx = NULL;
 795
 796         if ( candidate != META_TARGET_NONE ) {
 797                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 798
 799                 rs->sr_err = LDAP_SUCCESS;
 800
 801                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 802                 if ( rs->sr_err != LDAP_SUCCESS ) {
 803                         /*
 804                          * better check the type of error. In some cases
 805                          * (search ?) it might be better to return a
 806                          * success if at least one of the targets gave
 807                          * positive result ...
 808                          */
 809                         ldap_get_option( msc->msc_ld,
 810                                         LDAP_OPT_ERROR_STRING, &rmsg );
 811                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 812                                 ldap_memfree( rmsg );
 813                                 rmsg = NULL;
 814                         }
 815
 816                         ldap_get_option( msc->msc_ld,
 817                                         LDAP_OPT_MATCHED_DN, &rmatch );
 818                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 819                                 ldap_memfree( rmatch );
 820                                 rmatch = NULL;
 821                         }
 822
 823                         rerr = rs->sr_err = slap_map_api2result( rs );
 824
 825                         Debug(LDAP_DEBUG_ANY,
 826                                         "==> meta_back_op_result: target"
 827                                         " <%d> sending msg \"%s\""
 828                                         " (matched \"%s\")\n",
 829                                         candidate, ( rmsg ? rmsg : "" ),
 830                                         ( rmatch ? rmatch : "" ) );
 831                 }
 832
 833         } else {
 834                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 835                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 836                         char                    *msg = NULL;
 837                         char                    *match = NULL;
 838
 839                         rs->sr_err = LDAP_SUCCESS;
 840
 841                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 842                         if ( rs->sr_err != LDAP_SUCCESS ) {
 843                                 /*
 844                                  * better check the type of error. In some cases
 845                                  * (search ?) it might be better to return a
 846                                  * success if at least one of the targets gave
 847                                  * positive result ...
 848                                  */
 849                                 ldap_get_option( msc->msc_ld,
 850                                                 LDAP_OPT_ERROR_STRING, &msg );
 851                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 852                                         ldap_memfree( msg );
 853                                         msg = NULL;
 854                                 }
 855
 856                                 ldap_get_option( msc->msc_ld,
 857                                                 LDAP_OPT_MATCHED_DN, &match );
 858                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 859                                         ldap_memfree( match );
 860                                         match = NULL;
 861                                 }
 862
 863                                 rs->sr_err = slap_map_api2result( rs );
 864
 865                                 Debug(LDAP_DEBUG_ANY,
 866                                                 "==> meta_back_op_result: target"
 867                                                 " <%d> sending msg \"%s\""
 868                                                 " (matched \"%s\")\n",
 869                                                 i, ( msg ? msg : "" ),
 870                                                 ( match ? match : "" ) );
 871
 872                                 /*
 873                                  * FIXME: need to rewrite "match" (need rwinfo)
 874                                  */
 875                                 switch ( rs->sr_err ) {
 876                                 default:
 877                                         rerr = rs->sr_err;
 878                                         if ( msg != NULL ) {
 879                                                 if ( rmsg ) {
 880                                                         ldap_memfree( rmsg );
 881                                                 }
 882                                                 rmsg = msg;
 883                                                 msg = NULL;
 884                                         }
 885                                         if ( match != NULL ) {
 886                                                 if ( rmatch ) {
 887                                                         ldap_memfree( rmatch );
 888                                                 }
 889                                                 rmatch = match;
 890                                                 match = NULL;
 891                                         }
 892                                         break;
 893                                 }
 894
 895                                 if ( msg ) {
 896                                         ldap_memfree( msg );
 897                                 }
 898
 899                                 if ( match ) {
 900                                         ldap_memfree( match );
 901                                 }
 902                         }
 903                 }
 904         }
 905
 906         rs->sr_err = rerr;
 907         if ( rmsg != NULL ) {
 908                 save_rmsg = rs->sr_text;
 909                 rs->sr_text = rmsg;
 910         }
 911         if ( rmatch != NULL ) {
 912                 struct berval   dn, pdn;
 913
 914                 ber_str2bv( rmatch, 0, 0, &dn );
 915                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 916                         ldap_memfree( rmatch );
 917                         rmatch_ctx = op->o_tmpmemctx;
 918                         rmatch = pdn.bv_val;
 919                 }
 920                 save_rmatch = rs->sr_matched;
 921                 rs->sr_matched = rmatch;
 922         }
 923         send_ldap_result( op, rs );
 924         if ( rmsg != NULL ) {
 925                 ber_memfree( rmsg );
 926                 rs->sr_text = save_rmsg;
 927         }
 928         if ( rmatch != NULL ) {
 929                 ber_memfree_x( rmatch, rmatch_ctx );
 930                 rs->sr_matched = save_rmatch;
 931         }
 932
 933         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 934 }
 935