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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2006 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36
  37 int
  38 meta_back_bind( Operation *op, SlapReply *rs )
  39 {
  40         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  41         metaconn_t      *mc = NULL;
  42
  43         int             rc = LDAP_OTHER,
  44                         i,
  45                         gotit = 0,
  46                         isroot = 0;
  47
  48         SlapReply       *candidates = meta_back_candidates_get( op );
  49
  50         rs->sr_err = LDAP_SUCCESS;
  51
  52         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  53                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  54
  55         /* the test on the bind method should be superfluous */
  56         if ( op->orb_method == LDAP_AUTH_SIMPLE
  57                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  58         {
  59                 if ( !be_isroot_pw( op ) ) {
  60                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  61                         rs->sr_text = NULL;
  62                         send_ldap_result( op, rs );
  63                         return rs->sr_err;
  64                 }
  65
  66                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  67                         rs->sr_err = LDAP_SUCCESS;
  68                         rs->sr_text = NULL;
  69                         /* frontend will return success */
  70                         return rs->sr_err;
  71                 }
  72
  73                 isroot = 1;
  74         }
  75
  76         /* we need meta_back_getconn() not send result even on error,
  77          * because we want to intercept the error and make it
  78          * invalidCredentials */
  79         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  80         if ( !mc ) {
  81                 char    buf[ SLAP_TEXT_BUFLEN ];
  82
  83                 snprintf( buf, sizeof( buf ),
  84                         "meta_back_bind: no target "
  85                         "for dn \"%s\" (%d%s%s).",
  86                         op->o_req_dn.bv_val, rs->sr_err,
  87                         rs->sr_text ? ". " : "",
  88                         rs->sr_text ? rs->sr_text : "" );
  89                 Debug( LDAP_DEBUG_ANY,
  90                         "%s %s\n",
  91                         op->o_log_prefix, buf, 0 );
  92
  93                 /* FIXME: there might be cases where we don't want
  94                  * to map the error onto invalidCredentials */
  95                 switch ( rs->sr_err ) {
  96                 case LDAP_NO_SUCH_OBJECT:
  97                 case LDAP_UNWILLING_TO_PERFORM:
  98                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  99                         rs->sr_text = NULL;
 100                         break;
 101                 }
 102                 send_ldap_result( op, rs );
 103                 return rs->sr_err;
 104         }
 105
 106         /*
 107          * Each target is scanned ...
 108          */
 109         mc->mc_authz_target = META_BOUND_NONE;
 110         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 111                 metatarget_t    *mt = mi->mi_targets[ i ];
 112                 int             lerr;
 113                 Operation       op2 = *op;
 114                 int             massage = 1;
 115
 116                 /*
 117                  * Skip non-candidates
 118                  */
 119                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 120                         continue;
 121                 }
 122
 123                 if ( gotit == 0 ) {
 124                         /* set rc to LDAP_SUCCESS only if at least
 125                          * one candidate has been tried */
 126                         rc = LDAP_SUCCESS;
 127                         gotit = 1;
 128
 129                 } else if ( isroot == 0 ) {
 130                         /*
 131                          * A bind operation is expected to have
 132                          * ONE CANDIDATE ONLY!
 133                          */
 134                         Debug( LDAP_DEBUG_ANY,
 135                                 "### %s meta_back_bind: more than one"
 136                                 " candidate selected...\n",
 137                                 op->o_log_prefix, 0, 0 );
 138                 }
 139
 140                 if ( isroot ) {
 141                         if ( BER_BVISNULL( &mt->mt_pseudorootdn ) )
 142                         {
 143                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 144
 145                                 /* skip the target if no pseudorootdn is provided */
 146                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 147                                         ch_free( msc->msc_bound_ndn.bv_val );
 148                                         BER_BVZERO( &msc->msc_bound_ndn );
 149                                 }
 150
 151                                 if ( LDAP_BACK_SAVECRED( mi ) &&
 152                                         !BER_BVISNULL( &msc->msc_cred ) )
 153                                 {
 154                                         /* destroy sensitive data */
 155                                         memset( msc->msc_cred.bv_val, 0,
 156                                                 msc->msc_cred.bv_len );
 157                                         ch_free( msc->msc_cred.bv_val );
 158                                         BER_BVZERO( &msc->msc_cred );
 159                                 }
 160
 161                                 continue;
 162                         }
 163
 164                         op2.o_req_dn = mt->mt_pseudorootdn;
 165                         op2.o_req_ndn = mt->mt_pseudorootdn;
 166                         op2.orb_cred = mt->mt_pseudorootpw;
 167                         op2.orb_method = LDAP_AUTH_SIMPLE;
 168
 169                         massage = 0;
 170                 }
 171
 172                 lerr = meta_back_single_bind( &op2, rs, mc, i, massage );
 173
 174                 if ( lerr != LDAP_SUCCESS ) {
 175                         rc = rs->sr_err = lerr;
 176                         /* FIXME: in some cases (e.g. unavailable)
 177                          * do not assume it's not candidate; rather
 178                          * mark this as an error to be eventually
 179                          * reported to client */
 180                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 181                         break;
 182                 }
 183         }
 184
 185         /* must re-insert if local DN changed as result of bind */
 186         if ( rc == LDAP_SUCCESS ) {
 187                 if ( isroot ) {
 188                         mc->mc_authz_target = META_BOUND_ALL;
 189                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 190                 }
 191
 192                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 193                         metaconn_t      *tmpmc;
 194                         int             lerr;
 195
 196                         /* wait for all other ops to release the connection */
 197 retry_lock:;
 198                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 199                         if ( mc->mc_refcnt > 1 ) {
 200                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 201                                 ldap_pvt_thread_yield();
 202                                 goto retry_lock;
 203                         }
 204
 205                         assert( mc->mc_refcnt == 1 );
 206                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 207                                 meta_back_conndn_cmp );
 208                         assert( tmpmc == mc );
 209
 210                         /* delete all cached connections with the current connection */
 211                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 212                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 213                                 {
 214                                         Debug( LDAP_DEBUG_TRACE,
 215                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 216                                                 LDAP_BACK_PCONN_ID( mc->mc_conn ), mc->mc_refcnt, 0 );
 217
 218                                         if ( mc->mc_refcnt != 0 ) {
 219                                                 /* taint it */
 220                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 221
 222                                         } else {
 223                                                 /*
 224                                                  * Needs a test because the handler may be corrupted,
 225                                                  * and calling ldap_unbind on a corrupted header results
 226                                                  * in a segmentation fault
 227                                                  */
 228                                                 meta_back_conn_free( tmpmc );
 229                                         }
 230                                 }
 231                         }
 232
 233                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 234                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 235                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 236                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 237                         if ( lerr == -1 ) {
 238                                 meta_clear_candidates( op, mc );
 239
 240                                 /* we can do this because mc_refcnt == 1 */
 241                                 mc->mc_refcnt = 0;
 242                                 meta_back_conn_free( mc );
 243                                 mc = NULL;
 244                         }
 245                 }
 246         }
 247
 248         if ( mc != NULL ) {
 249                 meta_back_release_conn( op, mc );
 250         }
 251
 252         /*
 253          * rc is LDAP_SUCCESS if at least one bind succeeded,
 254          * err is the last error that occurred during a bind;
 255          * if at least (and at most?) one bind succeeds, fine.
 256          */
 257         if ( rc != LDAP_SUCCESS ) {
 258
 259                 /*
 260                  * deal with bind failure ...
 261                  */
 262
 263                 /*
 264                  * no target was found within the naming context,
 265                  * so bind must fail with invalid credentials
 266                  */
 267                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 268                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 269                 } else {
 270                         rs->sr_err = slap_map_api2result( rs );
 271                 }
 272                 send_ldap_result( op, rs );
 273                 return rs->sr_err;
 274
 275         }
 276
 277         return LDAP_SUCCESS;
 278 }
 279
 280 /*
 281  * meta_back_single_bind
 282  *
 283  * attempts to perform a bind with creds
 284  */
 285 int
 286 meta_back_single_bind(
 287         Operation               *op,
 288         SlapReply               *rs,
 289         metaconn_t              *mc,
 290         int                     candidate,
 291         int                     massage )
 292 {
 293         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 294         metatarget_t            *mt = mi->mi_targets[ candidate ];
 295         struct berval           mdn = BER_BVNULL;
 296         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 297         int                     msgid,
 298                                 rebinding = 0;
 299
 300
 301         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 302                 ch_free( msc->msc_bound_ndn.bv_val );
 303                 BER_BVZERO( &msc->msc_bound_ndn );
 304         }
 305
 306         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 307                 /* destroy sensitive data */
 308                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 309                 ch_free( msc->msc_cred.bv_val );
 310                 BER_BVZERO( &msc->msc_cred );
 311         }
 312
 313         /*
 314          * Rewrite the bind dn if needed
 315          */
 316         if ( massage ) {
 317                 dncookie                dc;
 318
 319                 dc.target = mt;
 320                 dc.conn = op->o_conn;
 321                 dc.rs = rs;
 322                 dc.ctx = "bindDN";
 323
 324                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 325                         rs->sr_text = "DN rewrite error";
 326                         rs->sr_err = LDAP_OTHER;
 327                         return rs->sr_err;
 328                 }
 329
 330         } else {
 331                 mdn = op->o_req_dn;
 332         }
 333
 334         /* FIXME: this fixes the bind problem right now; we need
 335          * to use the asynchronous version to get the "matched"
 336          * and more in case of failure ... */
 337         /* FIXME: should we check if at least some of the op->o_ctrls
 338          * can/should be passed? */
 339 rebind:;
 340         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 341                         LDAP_SASL_SIMPLE, &op->orb_cred,
 342                         op->o_ctrls, NULL, &msgid );
 343         if ( rs->sr_err == LDAP_SUCCESS ) {
 344                 LDAPMessage     *res;
 345                 struct timeval  tv;
 346                 int             rc;
 347                 int             nretries = mt->mt_nretries;
 348                 char            buf[ SLAP_TEXT_BUFLEN ];
 349
 350                 LDAP_BACK_TV_SET( &tv );
 351
 352                 /*
 353                  * handle response!!!
 354                  */
 355 retry:;
 356                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 357                 case 0:
 358                         snprintf( buf, sizeof( buf ),
 359                                 "ldap_result=0 nretries=%d%s",
 360                                 nretries, rebinding ? " rebinding" : "" );
 361                         Debug( LDAP_DEBUG_ANY,
 362                                 "%s meta_back_single_bind[%d]: %s.\n",
 363                                 op->o_log_prefix, candidate, buf );
 364
 365                         if ( nretries != META_RETRY_NEVER ) {
 366                                 ldap_pvt_thread_yield();
 367                                 if ( nretries > 0 ) {
 368                                         nretries--;
 369                                 }
 370                                 tv = mt->mt_bind_timeout;
 371                                 goto retry;
 372                         }
 373
 374                         rs->sr_err = LDAP_BUSY;
 375                         if ( rebinding ) {
 376                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 377                                 break;
 378                         }
 379
 380                         /* FIXME: some times the request times out
 381                          * while the other party is not willing to
 382                          * send a response any more.  Give it a second
 383                          * chance with a freshly bound connection */
 384                         rebinding = 1;
 385                         nretries = mt->mt_nretries;
 386                         /* fallthru */
 387
 388                 case -1:
 389                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 390                                 &rs->sr_err );
 391
 392                         if ( rebinding ) {
 393                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 394                         }
 395
 396                         snprintf( buf, sizeof( buf ),
 397                                 "err=%d (%s) nretries=%d",
 398                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 399                         Debug( LDAP_DEBUG_ANY,
 400                                 "### %s meta_back_single_bind[%d]: %s.\n",
 401                                 op->o_log_prefix, candidate, buf );
 402
 403                         rc = slap_map_api2result( rs );
 404                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 405                                 rc = meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND );
 406                                 if ( rc ) {
 407                                         if ( nretries > 0 ) {
 408                                                 nretries--;
 409                                         }
 410                                         ldap_pvt_thread_yield();
 411                                         goto rebind;
 412                                 }
 413                                 goto return_results;
 414                         }
 415                         break;
 416
 417                 default:
 418                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 419                                         NULL, NULL, NULL, NULL, 1 );
 420                         if ( rc != LDAP_SUCCESS ) {
 421                                 rs->sr_err = rc;
 422                         }
 423                         break;
 424                 }
 425         }
 426
 427         if ( rs->sr_err != LDAP_SUCCESS ) {
 428                 rs->sr_err = slap_map_api2result( rs );
 429                 goto return_results;
 430         }
 431
 432         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 433         LDAP_BACK_CONN_ISBOUND_SET( msc );
 434         mc->mc_authz_target = candidate;
 435
 436         if ( LDAP_BACK_SAVECRED( mi ) ) {
 437                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 438                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 439         }
 440
 441         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 442                         && op->o_req_ndn.bv_len != 0 )
 443         {
 444                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 445                                 &op->o_req_ndn, candidate );
 446         }
 447
 448 return_results:;
 449         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 450                 free( mdn.bv_val );
 451         }
 452
 453         return rs->sr_err;
 454 }
 455
 456 /*
 457  * meta_back_single_dobind
 458  */
 459 int
 460 meta_back_single_dobind(
 461         Operation               *op,
 462         SlapReply               *rs,
 463         metaconn_t              **mcp,
 464         int                     candidate,
 465         ldap_back_send_t        sendok,
 466         int                     nretries,
 467         int                     dolock )
 468 {
 469         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 470         metatarget_t            *mt = mi->mi_targets[ candidate ];
 471         metaconn_t              *mc = *mcp;
 472         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 473         int                     rc;
 474         static struct berval    cred = BER_BVC( "" );
 475         int                     msgid,
 476                                 rebinding = 0,
 477                                 save_nretries = nretries;
 478
 479         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 480
 481         /*
 482          * meta_back_single_dobind() calls meta_back_single_bind()
 483          * if required.
 484          */
 485         if ( be_isroot( op ) && !BER_BVISNULL( &mt->mt_pseudorootdn ) )
 486         {
 487                 Operation       op2 = *op;
 488
 489                 op2.o_tag = LDAP_REQ_BIND;
 490                 op2.o_req_dn = mt->mt_pseudorootdn;
 491                 op2.o_req_ndn = mt->mt_pseudorootdn;
 492                 op2.orb_cred = mt->mt_pseudorootpw;
 493                 op2.orb_method = LDAP_AUTH_SIMPLE;
 494
 495                 rc = meta_back_single_bind( &op2, rs, *mcp, candidate, 0 );
 496                 goto done;
 497         }
 498
 499         /*
 500          * Otherwise an anonymous bind is performed
 501          * (note: if the target was already bound, the anonymous
 502          * bind clears the previous bind).
 503          */
 504         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 505                 ber_memfree( msc->msc_bound_ndn.bv_val );
 506                 BER_BVZERO( &msc->msc_bound_ndn );
 507         }
 508
 509         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 510                 /* destroy sensitive data */
 511                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 512                 ber_memfree( msc->msc_cred.bv_val );
 513                 BER_BVZERO( &msc->msc_cred );
 514         }
 515
 516         /* FIXME: should we check if at least some of the op->o_ctrls
 517          * can/should be passed? */
 518 rebind:;
 519         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 520                         NULL, NULL, &msgid );
 521         if ( rc == LDAP_SUCCESS ) {
 522                 LDAPMessage     *res;
 523                 struct timeval  tv;
 524                 char            buf[ SLAP_TEXT_BUFLEN ];
 525
 526                 LDAP_BACK_TV_SET( &tv );
 527
 528                 /*
 529                  * handle response!!!
 530                  */
 531 retry:;
 532                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 533                 case 0:
 534                         snprintf( buf, sizeof( buf ),
 535                                 "ldap_result=0 nretries=%d%s",
 536                                 nretries, rebinding ? " rebinding" : "" );
 537                         Debug( LDAP_DEBUG_ANY,
 538                                 "%s meta_back_single_dobind[%d]: %s.\n",
 539                                 op->o_log_prefix, candidate, buf );
 540
 541                         if ( nretries != META_RETRY_NEVER ) {
 542                                 ldap_pvt_thread_yield();
 543                                 if ( nretries > 0 ) {
 544                                         nretries--;
 545                                 }
 546                                 tv = mt->mt_bind_timeout;
 547                                 goto retry;
 548                         }
 549
 550                         rc = LDAP_BUSY;
 551                         if ( rebinding ) {
 552                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 553                                 break;
 554                         }
 555
 556                         /* FIXME: some times the request times out
 557                          * while the other party is not willing to
 558                          * send a response any more.  Give it a second
 559                          * chance with a freshly bound connection */
 560                         rebinding = 1;
 561                         nretries = save_nretries;
 562                         /* fallthru */
 563
 564                 case -1:
 565                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 566                                 &rs->sr_err );
 567
 568                         if ( rebinding ) {
 569                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 570                         }
 571
 572                         snprintf( buf, sizeof( buf ),
 573                                 "err=%d (%s) nretries=%d",
 574                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 575                         Debug( LDAP_DEBUG_ANY,
 576                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 577                                 op->o_log_prefix, candidate, buf );
 578
 579                         rc = slap_map_api2result( rs );
 580                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 581                                 if ( dolock ) {
 582                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 583                                 }
 584
 585                                 if ( mc->mc_refcnt == 1 ) {
 586                                         meta_clear_one_candidate( msc );
 587                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 588
 589                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 590
 591                                         /* mc here must be the regular mc,
 592                                          * reset and ready for init */
 593                                         rc = meta_back_init_one_conn( op, rs,
 594                                                 mt, mc, candidate,
 595                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 596                                                 LDAP_BACK_DONTSEND );
 597                                         if ( rc == LDAP_SUCCESS ) {
 598                                                 LDAP_BACK_CONN_BINDING_SET( msc );
 599                                         }
 600
 601                                 } else {
 602                                         /* can't do anything about it */
 603                                         rc = LDAP_UNAVAILABLE;
 604                                 }
 605
 606                                 if ( dolock ) {
 607                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 608                                 }
 609
 610                                 if ( rc == LDAP_SUCCESS ) {
 611                                         ldap_pvt_thread_yield();
 612                                         if ( nretries > 0 ) {
 613                                                 nretries--;
 614                                         }
 615                                         goto rebind;
 616                                 }
 617                         }
 618                         break;
 619
 620                 default:
 621                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 622                                         NULL, NULL, NULL, NULL, 1 );
 623                         if ( rc == LDAP_SUCCESS ) {
 624                                 rc = slap_map_api2result( rs );
 625                         }
 626                         break;
 627                 }
 628
 629         } else {
 630                 rs->sr_err = rc;
 631                 rc = slap_map_api2result( rs );
 632         }
 633
 634 done:;
 635         rs->sr_err = rc;
 636         if ( rc != LDAP_SUCCESS && META_BACK_ONERR_STOP( mi ) ) {
 637                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 638                 LDAP_BACK_CONN_TAINTED_SET( mc );
 639                 meta_back_release_conn_lock( op, mc, dolock );
 640                 *mcp = NULL;
 641
 642                 if ( sendok & LDAP_BACK_SENDERR ) {
 643                         send_ldap_result( op, rs );
 644                 }
 645         }
 646
 647         return rc;
 648 }
 649
 650 /*
 651  * meta_back_dobind
 652  */
 653 int
 654 meta_back_dobind(
 655         Operation               *op,
 656         SlapReply               *rs,
 657         metaconn_t              *mc,
 658         ldap_back_send_t        sendok )
 659 {
 660         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 661
 662         int                     bound = 0,
 663                                 i,
 664                                 isroot = 0;
 665
 666         SlapReply               *candidates = meta_back_candidates_get( op );
 667
 668         if ( be_isroot( op ) ) {
 669                 isroot = 1;
 670         }
 671
 672         Debug( LDAP_DEBUG_TRACE,
 673                 "%s meta_back_dobind: conn=%ld%s\n",
 674                 op->o_log_prefix,
 675                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 676                 isroot ? " (isroot)" : "" );
 677
 678         /*
 679          * all the targets are bound as pseudoroot
 680          */
 681         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 682                 bound = 1;
 683                 goto done;
 684         }
 685
 686         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 687                 metatarget_t            *mt = mi->mi_targets[ i ];
 688                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 689                 int                     rc, do_retry = 1;
 690
 691                 /*
 692                  * Not a candidate
 693                  */
 694                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 695                         continue;
 696                 }
 697
 698                 assert( msc->msc_ld != NULL );
 699
 700                 /*
 701                  * If the target is already bound it is skipped
 702                  */
 703
 704 retry_binding:;
 705                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 706                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 707                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 708                         ++bound;
 709                         continue;
 710
 711                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 712                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 713                         ldap_pvt_thread_yield();
 714                         goto retry_binding;
 715
 716                 } else {
 717                         LDAP_BACK_CONN_BINDING_SET( msc );
 718                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 719                 }
 720
 721 retry:;
 722                 rc = meta_back_single_dobind( op, rs, &mc, i,
 723                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 724                 /*
 725                  * NOTE: meta_back_single_dobind() already retries;
 726                  * in case of failure, it resets mc...
 727                  */
 728                 if ( rc != LDAP_SUCCESS ) {
 729                         char            buf[ SLAP_TEXT_BUFLEN ];
 730
 731                         if ( mc == NULL ) {
 732                                 /* meta_back_single_dobind() already sent
 733                                  * response and released connection */
 734                                 goto send_err;
 735                         }
 736
 737
 738                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 739                                 do_retry = 0;
 740                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 741                                         goto retry;
 742                                 }
 743
 744                                 if ( mc != NULL ) {
 745                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 746                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 747                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 748                                 }
 749
 750                                 return 0;
 751                         }
 752
 753                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 754                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 755                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 756
 757                         snprintf( buf, sizeof( buf ),
 758                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 759                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 760                                 rc, ldap_err2string( rc ) );
 761                         Debug( LDAP_DEBUG_ANY,
 762                                 "%s %s\n",
 763                                 op->o_log_prefix, buf, 0 );
 764
 765                         /*
 766                          * null cred bind should always succeed
 767                          * as anonymous, so a failure means
 768                          * the target is no longer candidate possibly
 769                          * due to technical reasons (remote host down?)
 770                          * so better clear the handle
 771                          */
 772                         /* leave the target candidate, but record the error for later use */
 773                         candidates[ i ].sr_err = rc;
 774                         if ( META_BACK_ONERR_STOP( mi ) ) {
 775                                 bound = 0;
 776                                 goto done;
 777                         }
 778
 779                         continue;
 780                 } /* else */
 781
 782                 Debug( LDAP_DEBUG_TRACE,
 783                         "%s meta_back_dobind[%d]: "
 784                         "(%s)\n",
 785                         op->o_log_prefix, i,
 786                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 787
 788                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 789                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 790                 if ( isroot ) {
 791                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 792                 } else {
 793                         LDAP_BACK_CONN_ISANON_SET( msc );
 794                 }
 795                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 796                 ++bound;
 797         }
 798
 799 done:;
 800         Debug( LDAP_DEBUG_TRACE,
 801                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 802                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 803
 804         if ( bound == 0 ) {
 805                 meta_back_release_conn( op, mc );
 806
 807 send_err:;
 808                 if ( sendok & LDAP_BACK_SENDERR ) {
 809                         if ( rs->sr_err == LDAP_SUCCESS ) {
 810                                 rs->sr_err = LDAP_BUSY;
 811                         }
 812                         send_ldap_result( op, rs );
 813                 }
 814
 815                 return 0;
 816         }
 817
 818         return ( bound > 0 );
 819 }
 820
 821 /*
 822  * meta_back_default_rebind
 823  *
 824  * This is a callback used for chasing referrals using the same
 825  * credentials as the original user on this session.
 826  */
 827 int
 828 meta_back_default_rebind(
 829         LDAP                    *ld,
 830         LDAP_CONST char         *url,
 831         ber_tag_t               request,
 832         ber_int_t               msgid,
 833         void                    *params )
 834 {
 835         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 836
 837         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 838                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 839                         NULL, NULL, NULL );
 840 }
 841
 842 /*
 843  * meta_back_default_urllist
 844  *
 845  * This is a callback used for mucking with the urllist
 846  */
 847 int
 848 meta_back_default_urllist(
 849         LDAP            *ld,
 850         LDAPURLDesc     **urllist,
 851         LDAPURLDesc     **url,
 852         void            *params )
 853 {
 854         metatarget_t    *mt = (metatarget_t *)params;
 855         LDAPURLDesc     **urltail;
 856
 857         if ( urllist == url ) {
 858                 return LDAP_SUCCESS;
 859         }
 860
 861         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 862                 /* count */ ;
 863
 864         *urltail = *urllist;
 865         *urllist = *url;
 866         *url = NULL;
 867
 868         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 869         if ( mt->mt_uri ) {
 870                 ch_free( mt->mt_uri );
 871         }
 872
 873         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 874         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 875
 876         return LDAP_SUCCESS;
 877 }
 878
 879 /*
 880  * FIXME: error return must be handled in a cleaner way ...
 881  */
 882 int
 883 meta_back_op_result(
 884         metaconn_t      *mc,
 885         Operation       *op,
 886         SlapReply       *rs,
 887         int             candidate )
 888 {
 889         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 890
 891         int                     i,
 892                                 rerr = LDAP_SUCCESS;
 893         char                    *rmsg = NULL,
 894                                 *rmatch = NULL;
 895         const char              *save_rmsg = NULL,
 896                                 *save_rmatch = NULL;
 897         void                    *rmatch_ctx = NULL;
 898
 899         assert( mc != NULL );
 900
 901         if ( candidate != META_TARGET_NONE ) {
 902                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 903
 904                 rs->sr_err = LDAP_SUCCESS;
 905
 906                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 907                 if ( rs->sr_err != LDAP_SUCCESS ) {
 908                         /*
 909                          * better check the type of error. In some cases
 910                          * (search ?) it might be better to return a
 911                          * success if at least one of the targets gave
 912                          * positive result ...
 913                          */
 914                         ldap_get_option( msc->msc_ld,
 915                                         LDAP_OPT_ERROR_STRING, &rmsg );
 916                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 917                                 ldap_memfree( rmsg );
 918                                 rmsg = NULL;
 919                         }
 920
 921                         ldap_get_option( msc->msc_ld,
 922                                         LDAP_OPT_MATCHED_DN, &rmatch );
 923                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 924                                 ldap_memfree( rmatch );
 925                                 rmatch = NULL;
 926                         }
 927
 928                         rerr = rs->sr_err = slap_map_api2result( rs );
 929
 930                         Debug(LDAP_DEBUG_ANY,
 931                                         "==> meta_back_op_result: target"
 932                                         " <%d> sending msg \"%s\""
 933                                         " (matched \"%s\")\n",
 934                                         candidate, ( rmsg ? rmsg : "" ),
 935                                         ( rmatch ? rmatch : "" ) );
 936                 }
 937
 938         } else {
 939                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 940                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 941                         char                    *msg = NULL;
 942                         char                    *match = NULL;
 943
 944                         rs->sr_err = LDAP_SUCCESS;
 945
 946                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 947                         if ( rs->sr_err != LDAP_SUCCESS ) {
 948                                 /*
 949                                  * better check the type of error. In some cases
 950                                  * (search ?) it might be better to return a
 951                                  * success if at least one of the targets gave
 952                                  * positive result ...
 953                                  */
 954                                 ldap_get_option( msc->msc_ld,
 955                                                 LDAP_OPT_ERROR_STRING, &msg );
 956                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 957                                         ldap_memfree( msg );
 958                                         msg = NULL;
 959                                 }
 960
 961                                 ldap_get_option( msc->msc_ld,
 962                                                 LDAP_OPT_MATCHED_DN, &match );
 963                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 964                                         ldap_memfree( match );
 965                                         match = NULL;
 966                                 }
 967
 968                                 rs->sr_err = slap_map_api2result( rs );
 969
 970                                 Debug(LDAP_DEBUG_ANY,
 971                                                 "==> meta_back_op_result: target"
 972                                                 " <%d> sending msg \"%s\""
 973                                                 " (matched \"%s\")\n",
 974                                                 i, ( msg ? msg : "" ),
 975                                                 ( match ? match : "" ) );
 976
 977                                 /*
 978                                  * FIXME: need to rewrite "match" (need rwinfo)
 979                                  */
 980                                 switch ( rs->sr_err ) {
 981                                 default:
 982                                         rerr = rs->sr_err;
 983                                         if ( msg != NULL ) {
 984                                                 if ( rmsg ) {
 985                                                         ldap_memfree( rmsg );
 986                                                 }
 987                                                 rmsg = msg;
 988                                                 msg = NULL;
 989                                         }
 990                                         if ( match != NULL ) {
 991                                                 if ( rmatch ) {
 992                                                         ldap_memfree( rmatch );
 993                                                 }
 994                                                 rmatch = match;
 995                                                 match = NULL;
 996                                         }
 997                                         break;
 998                                 }
 999
1000                                 if ( msg ) {
1001                                         ldap_memfree( msg );
1002                                 }
1003
1004                                 if ( match ) {
1005                                         ldap_memfree( match );
1006                                 }
1007                         }
1008                 }
1009         }
1010
1011         rs->sr_err = rerr;
1012         if ( rmsg != NULL ) {
1013                 save_rmsg = rs->sr_text;
1014                 rs->sr_text = rmsg;
1015         }
1016         if ( rmatch != NULL ) {
1017                 struct berval   dn, pdn;
1018
1019                 ber_str2bv( rmatch, 0, 0, &dn );
1020                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1021                         ldap_memfree( rmatch );
1022                         rmatch_ctx = op->o_tmpmemctx;
1023                         rmatch = pdn.bv_val;
1024                 }
1025                 save_rmatch = rs->sr_matched;
1026                 rs->sr_matched = rmatch;
1027         }
1028         send_ldap_result( op, rs );
1029         if ( rmsg != NULL ) {
1030                 ber_memfree( rmsg );
1031                 rs->sr_text = save_rmsg;
1032         }
1033         if ( rmatch != NULL ) {
1034                 ber_memfree_x( rmatch, rmatch_ctx );
1035                 rs->sr_matched = save_rmatch;
1036         }
1037
1038         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
1039 }
1040