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                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 235                                 mc->mc_conn = LDAP_BACK_PCONN_SET( op );
 236                         }
 237                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 238                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 239                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 240                         if ( lerr == -1 ) {
 241                                 meta_clear_candidates( op, mc );
 242
 243                                 /* we can do this because mc_refcnt == 1 */
 244                                 mc->mc_refcnt = 0;
 245                                 meta_back_conn_free( mc );
 246                                 mc = NULL;
 247                         }
 248                 }
 249         }
 250
 251         if ( mc != NULL ) {
 252                 meta_back_release_conn( op, mc );
 253         }
 254
 255         /*
 256          * rc is LDAP_SUCCESS if at least one bind succeeded,
 257          * err is the last error that occurred during a bind;
 258          * if at least (and at most?) one bind succeeds, fine.
 259          */
 260         if ( rc != LDAP_SUCCESS ) {
 261
 262                 /*
 263                  * deal with bind failure ...
 264                  */
 265
 266                 /*
 267                  * no target was found within the naming context,
 268                  * so bind must fail with invalid credentials
 269                  */
 270                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 271                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 272                 } else {
 273                         rs->sr_err = slap_map_api2result( rs );
 274                 }
 275                 send_ldap_result( op, rs );
 276                 return rs->sr_err;
 277
 278         }
 279
 280         return LDAP_SUCCESS;
 281 }
 282
 283 /*
 284  * meta_back_single_bind
 285  *
 286  * attempts to perform a bind with creds
 287  */
 288 int
 289 meta_back_single_bind(
 290         Operation               *op,
 291         SlapReply               *rs,
 292         metaconn_t              *mc,
 293         int                     candidate,
 294         int                     massage )
 295 {
 296         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 297         metatarget_t            *mt = mi->mi_targets[ candidate ];
 298         struct berval           mdn = BER_BVNULL;
 299         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 300         int                     msgid,
 301                                 rebinding = 0;
 302
 303
 304         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 305                 ch_free( msc->msc_bound_ndn.bv_val );
 306                 BER_BVZERO( &msc->msc_bound_ndn );
 307         }
 308
 309         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 310                 /* destroy sensitive data */
 311                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 312                 ch_free( msc->msc_cred.bv_val );
 313                 BER_BVZERO( &msc->msc_cred );
 314         }
 315
 316         /*
 317          * Rewrite the bind dn if needed
 318          */
 319         if ( massage ) {
 320                 dncookie                dc;
 321
 322                 dc.target = mt;
 323                 dc.conn = op->o_conn;
 324                 dc.rs = rs;
 325                 dc.ctx = "bindDN";
 326
 327                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 328                         rs->sr_text = "DN rewrite error";
 329                         rs->sr_err = LDAP_OTHER;
 330                         return rs->sr_err;
 331                 }
 332
 333         } else {
 334                 mdn = op->o_req_dn;
 335         }
 336
 337         /* FIXME: this fixes the bind problem right now; we need
 338          * to use the asynchronous version to get the "matched"
 339          * and more in case of failure ... */
 340         /* FIXME: should we check if at least some of the op->o_ctrls
 341          * can/should be passed? */
 342 rebind:;
 343         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 344                         LDAP_SASL_SIMPLE, &op->orb_cred,
 345                         op->o_ctrls, NULL, &msgid );
 346         if ( rs->sr_err == LDAP_SUCCESS ) {
 347                 LDAPMessage     *res;
 348                 struct timeval  tv;
 349                 int             rc;
 350                 int             nretries = mt->mt_nretries;
 351                 char            buf[ SLAP_TEXT_BUFLEN ];
 352
 353                 LDAP_BACK_TV_SET( &tv );
 354
 355                 /*
 356                  * handle response!!!
 357                  */
 358 retry:;
 359                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 360                 case 0:
 361                         snprintf( buf, sizeof( buf ),
 362                                 "ldap_result=0 nretries=%d%s",
 363                                 nretries, rebinding ? " rebinding" : "" );
 364                         Debug( LDAP_DEBUG_ANY,
 365                                 "%s meta_back_single_bind[%d]: %s.\n",
 366                                 op->o_log_prefix, candidate, buf );
 367
 368                         if ( nretries != META_RETRY_NEVER ) {
 369                                 ldap_pvt_thread_yield();
 370                                 if ( nretries > 0 ) {
 371                                         nretries--;
 372                                 }
 373                                 tv = mt->mt_bind_timeout;
 374                                 goto retry;
 375                         }
 376
 377                         rs->sr_err = LDAP_BUSY;
 378                         if ( rebinding ) {
 379                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 380                                 break;
 381                         }
 382
 383                         /* FIXME: some times the request times out
 384                          * while the other party is not willing to
 385                          * send a response any more.  Give it a second
 386                          * chance with a freshly bound connection */
 387                         rebinding = 1;
 388                         nretries = mt->mt_nretries;
 389                         /* fallthru */
 390
 391                 case -1:
 392                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 393                                 &rs->sr_err );
 394
 395                         if ( rebinding ) {
 396                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 397                         }
 398
 399                         snprintf( buf, sizeof( buf ),
 400                                 "err=%d (%s) nretries=%d",
 401                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 402                         Debug( LDAP_DEBUG_ANY,
 403                                 "### %s meta_back_single_bind[%d]: %s.\n",
 404                                 op->o_log_prefix, candidate, buf );
 405
 406                         rc = slap_map_api2result( rs );
 407                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 408                                 rc = meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND );
 409                                 if ( rc ) {
 410                                         if ( nretries > 0 ) {
 411                                                 nretries--;
 412                                         }
 413                                         ldap_pvt_thread_yield();
 414                                         goto rebind;
 415                                 }
 416                                 goto return_results;
 417                         }
 418                         break;
 419
 420                 default:
 421                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 422                                         NULL, NULL, NULL, NULL, 1 );
 423                         if ( rc != LDAP_SUCCESS ) {
 424                                 rs->sr_err = rc;
 425                         }
 426                         break;
 427                 }
 428         }
 429
 430         if ( rs->sr_err != LDAP_SUCCESS ) {
 431                 rs->sr_err = slap_map_api2result( rs );
 432                 goto return_results;
 433         }
 434
 435         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 436         LDAP_BACK_CONN_ISBOUND_SET( msc );
 437         mc->mc_authz_target = candidate;
 438
 439         if ( LDAP_BACK_SAVECRED( mi ) ) {
 440                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 441                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 442         }
 443
 444         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 445                         && op->o_req_ndn.bv_len != 0 )
 446         {
 447                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 448                                 &op->o_req_ndn, candidate );
 449         }
 450
 451 return_results:;
 452         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 453                 free( mdn.bv_val );
 454         }
 455
 456         return rs->sr_err;
 457 }
 458
 459 /*
 460  * meta_back_single_dobind
 461  */
 462 int
 463 meta_back_single_dobind(
 464         Operation               *op,
 465         SlapReply               *rs,
 466         metaconn_t              **mcp,
 467         int                     candidate,
 468         ldap_back_send_t        sendok,
 469         int                     nretries,
 470         int                     dolock )
 471 {
 472         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 473         metatarget_t            *mt = mi->mi_targets[ candidate ];
 474         metaconn_t              *mc = *mcp;
 475         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 476         int                     rc;
 477         static struct berval    cred = BER_BVC( "" );
 478         int                     msgid,
 479                                 rebinding = 0,
 480                                 save_nretries = nretries;
 481
 482         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 483
 484         /*
 485          * meta_back_single_dobind() calls meta_back_single_bind()
 486          * if required.
 487          */
 488         if ( be_isroot( op ) && !BER_BVISNULL( &mt->mt_pseudorootdn ) )
 489         {
 490                 Operation       op2 = *op;
 491
 492                 op2.o_tag = LDAP_REQ_BIND;
 493                 op2.o_req_dn = mt->mt_pseudorootdn;
 494                 op2.o_req_ndn = mt->mt_pseudorootdn;
 495                 op2.orb_cred = mt->mt_pseudorootpw;
 496                 op2.orb_method = LDAP_AUTH_SIMPLE;
 497
 498                 rc = meta_back_single_bind( &op2, rs, *mcp, candidate, 0 );
 499                 goto done;
 500         }
 501
 502         /*
 503          * Otherwise an anonymous bind is performed
 504          * (note: if the target was already bound, the anonymous
 505          * bind clears the previous bind).
 506          */
 507         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 508                 ber_memfree( msc->msc_bound_ndn.bv_val );
 509                 BER_BVZERO( &msc->msc_bound_ndn );
 510         }
 511
 512         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 513                 /* destroy sensitive data */
 514                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 515                 ber_memfree( msc->msc_cred.bv_val );
 516                 BER_BVZERO( &msc->msc_cred );
 517         }
 518
 519         /* FIXME: should we check if at least some of the op->o_ctrls
 520          * can/should be passed? */
 521 rebind:;
 522         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 523                         NULL, NULL, &msgid );
 524         if ( rc == LDAP_SUCCESS ) {
 525                 LDAPMessage     *res;
 526                 struct timeval  tv;
 527                 char            buf[ SLAP_TEXT_BUFLEN ];
 528
 529                 LDAP_BACK_TV_SET( &tv );
 530
 531                 /*
 532                  * handle response!!!
 533                  */
 534 retry:;
 535                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 536                 case 0:
 537                         snprintf( buf, sizeof( buf ),
 538                                 "ldap_result=0 nretries=%d%s",
 539                                 nretries, rebinding ? " rebinding" : "" );
 540                         Debug( LDAP_DEBUG_ANY,
 541                                 "%s meta_back_single_dobind[%d]: %s.\n",
 542                                 op->o_log_prefix, candidate, buf );
 543
 544                         if ( nretries != META_RETRY_NEVER ) {
 545                                 ldap_pvt_thread_yield();
 546                                 if ( nretries > 0 ) {
 547                                         nretries--;
 548                                 }
 549                                 tv = mt->mt_bind_timeout;
 550                                 goto retry;
 551                         }
 552
 553                         rc = LDAP_BUSY;
 554                         if ( rebinding ) {
 555                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 556                                 break;
 557                         }
 558
 559                         /* FIXME: some times the request times out
 560                          * while the other party is not willing to
 561                          * send a response any more.  Give it a second
 562                          * chance with a freshly bound connection */
 563                         rebinding = 1;
 564                         nretries = save_nretries;
 565                         /* fallthru */
 566
 567                 case -1:
 568                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 569                                 &rs->sr_err );
 570
 571                         if ( rebinding ) {
 572                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 573                         }
 574
 575                         snprintf( buf, sizeof( buf ),
 576                                 "err=%d (%s) nretries=%d",
 577                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 578                         Debug( LDAP_DEBUG_ANY,
 579                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 580                                 op->o_log_prefix, candidate, buf );
 581
 582                         rc = slap_map_api2result( rs );
 583                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 584                                 if ( dolock ) {
 585                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 586                                 }
 587
 588                                 if ( mc->mc_refcnt == 1 ) {
 589                                         meta_clear_one_candidate( msc );
 590                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 591
 592                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 593
 594                                         /* mc here must be the regular mc,
 595                                          * reset and ready for init */
 596                                         rc = meta_back_init_one_conn( op, rs,
 597                                                 mt, mc, candidate,
 598                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 599                                                 LDAP_BACK_DONTSEND );
 600                                         if ( rc == LDAP_SUCCESS ) {
 601                                                 LDAP_BACK_CONN_BINDING_SET( msc );
 602                                         }
 603
 604                                 } else {
 605                                         /* can't do anything about it */
 606                                         rc = LDAP_UNAVAILABLE;
 607                                 }
 608
 609                                 if ( dolock ) {
 610                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 611                                 }
 612
 613                                 if ( rc == LDAP_SUCCESS ) {
 614                                         ldap_pvt_thread_yield();
 615                                         if ( nretries > 0 ) {
 616                                                 nretries--;
 617                                         }
 618                                         goto rebind;
 619                                 }
 620                         }
 621                         break;
 622
 623                 default:
 624                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 625                                         NULL, NULL, NULL, NULL, 1 );
 626                         if ( rc == LDAP_SUCCESS ) {
 627                                 rc = slap_map_api2result( rs );
 628                         }
 629                         break;
 630                 }
 631
 632         } else {
 633                 rs->sr_err = rc;
 634                 rc = slap_map_api2result( rs );
 635         }
 636
 637 done:;
 638         rs->sr_err = rc;
 639         if ( rc != LDAP_SUCCESS && META_BACK_ONERR_STOP( mi ) ) {
 640                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 641                 LDAP_BACK_CONN_TAINTED_SET( mc );
 642                 meta_back_release_conn_lock( op, mc, dolock );
 643                 *mcp = NULL;
 644
 645                 if ( sendok & LDAP_BACK_SENDERR ) {
 646                         send_ldap_result( op, rs );
 647                 }
 648         }
 649
 650         return rc;
 651 }
 652
 653 /*
 654  * meta_back_dobind
 655  */
 656 int
 657 meta_back_dobind(
 658         Operation               *op,
 659         SlapReply               *rs,
 660         metaconn_t              *mc,
 661         ldap_back_send_t        sendok )
 662 {
 663         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 664
 665         int                     bound = 0,
 666                                 i,
 667                                 isroot = 0;
 668
 669         SlapReply               *candidates = meta_back_candidates_get( op );
 670
 671         if ( be_isroot( op ) ) {
 672                 isroot = 1;
 673         }
 674
 675         Debug( LDAP_DEBUG_TRACE,
 676                 "%s meta_back_dobind: conn=%ld%s\n",
 677                 op->o_log_prefix,
 678                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 679                 isroot ? " (isroot)" : "" );
 680
 681         /*
 682          * all the targets are bound as pseudoroot
 683          */
 684         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 685                 bound = 1;
 686                 goto done;
 687         }
 688
 689         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 690                 metatarget_t            *mt = mi->mi_targets[ i ];
 691                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 692                 int                     rc, do_retry = 1;
 693
 694                 /*
 695                  * Not a candidate
 696                  */
 697                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 698                         continue;
 699                 }
 700
 701                 assert( msc->msc_ld != NULL );
 702
 703                 /*
 704                  * If the target is already bound it is skipped
 705                  */
 706
 707 retry_binding:;
 708                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 709                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 710                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 711                         ++bound;
 712                         continue;
 713
 714                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 715                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 716                         ldap_pvt_thread_yield();
 717                         goto retry_binding;
 718
 719                 } else {
 720                         LDAP_BACK_CONN_BINDING_SET( msc );
 721                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 722                 }
 723
 724 retry:;
 725                 rc = meta_back_single_dobind( op, rs, &mc, i,
 726                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 727                 /*
 728                  * NOTE: meta_back_single_dobind() already retries;
 729                  * in case of failure, it resets mc...
 730                  */
 731                 if ( rc != LDAP_SUCCESS ) {
 732                         char            buf[ SLAP_TEXT_BUFLEN ];
 733
 734                         if ( mc == NULL ) {
 735                                 /* meta_back_single_dobind() already sent
 736                                  * response and released connection */
 737                                 goto send_err;
 738                         }
 739
 740
 741                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 742                                 do_retry = 0;
 743                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 744                                         goto retry;
 745                                 }
 746
 747                                 if ( mc != NULL ) {
 748                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 749                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 750                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 751                                 }
 752
 753                                 return 0;
 754                         }
 755
 756                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 757                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 758                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 759
 760                         snprintf( buf, sizeof( buf ),
 761                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 762                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 763                                 rc, ldap_err2string( rc ) );
 764                         Debug( LDAP_DEBUG_ANY,
 765                                 "%s %s\n",
 766                                 op->o_log_prefix, buf, 0 );
 767
 768                         /*
 769                          * null cred bind should always succeed
 770                          * as anonymous, so a failure means
 771                          * the target is no longer candidate possibly
 772                          * due to technical reasons (remote host down?)
 773                          * so better clear the handle
 774                          */
 775                         /* leave the target candidate, but record the error for later use */
 776                         candidates[ i ].sr_err = rc;
 777                         if ( META_BACK_ONERR_STOP( mi ) ) {
 778                                 bound = 0;
 779                                 goto done;
 780                         }
 781
 782                         continue;
 783                 } /* else */
 784
 785                 Debug( LDAP_DEBUG_TRACE,
 786                         "%s meta_back_dobind[%d]: "
 787                         "(%s)\n",
 788                         op->o_log_prefix, i,
 789                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 790
 791                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 792                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 793                 if ( isroot ) {
 794                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 795                 } else {
 796                         LDAP_BACK_CONN_ISANON_SET( msc );
 797                 }
 798                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 799                 ++bound;
 800         }
 801
 802 done:;
 803         Debug( LDAP_DEBUG_TRACE,
 804                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 805                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 806
 807         if ( bound == 0 ) {
 808                 meta_back_release_conn( op, mc );
 809
 810 send_err:;
 811                 if ( sendok & LDAP_BACK_SENDERR ) {
 812                         if ( rs->sr_err == LDAP_SUCCESS ) {
 813                                 rs->sr_err = LDAP_BUSY;
 814                         }
 815                         send_ldap_result( op, rs );
 816                 }
 817
 818                 return 0;
 819         }
 820
 821         return ( bound > 0 );
 822 }
 823
 824 /*
 825  * meta_back_default_rebind
 826  *
 827  * This is a callback used for chasing referrals using the same
 828  * credentials as the original user on this session.
 829  */
 830 int
 831 meta_back_default_rebind(
 832         LDAP                    *ld,
 833         LDAP_CONST char         *url,
 834         ber_tag_t               request,
 835         ber_int_t               msgid,
 836         void                    *params )
 837 {
 838         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 839
 840         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 841                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 842                         NULL, NULL, NULL );
 843 }
 844
 845 /*
 846  * meta_back_default_urllist
 847  *
 848  * This is a callback used for mucking with the urllist
 849  */
 850 int
 851 meta_back_default_urllist(
 852         LDAP            *ld,
 853         LDAPURLDesc     **urllist,
 854         LDAPURLDesc     **url,
 855         void            *params )
 856 {
 857         metatarget_t    *mt = (metatarget_t *)params;
 858         LDAPURLDesc     **urltail;
 859
 860         if ( urllist == url ) {
 861                 return LDAP_SUCCESS;
 862         }
 863
 864         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 865                 /* count */ ;
 866
 867         *urltail = *urllist;
 868         *urllist = *url;
 869         *url = NULL;
 870
 871         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 872         if ( mt->mt_uri ) {
 873                 ch_free( mt->mt_uri );
 874         }
 875
 876         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 877         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 878
 879         return LDAP_SUCCESS;
 880 }
 881
 882 /*
 883  * FIXME: error return must be handled in a cleaner way ...
 884  */
 885 int
 886 meta_back_op_result(
 887         metaconn_t      *mc,
 888         Operation       *op,
 889         SlapReply       *rs,
 890         int             candidate )
 891 {
 892         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 893
 894         int                     i,
 895                                 rerr = LDAP_SUCCESS;
 896         char                    *rmsg = NULL,
 897                                 *rmatch = NULL;
 898         const char              *save_rmsg = NULL,
 899                                 *save_rmatch = NULL;
 900         void                    *rmatch_ctx = NULL;
 901
 902         assert( mc != NULL );
 903
 904         if ( candidate != META_TARGET_NONE ) {
 905                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 906
 907                 rs->sr_err = LDAP_SUCCESS;
 908
 909                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 910                 if ( rs->sr_err != LDAP_SUCCESS ) {
 911                         /*
 912                          * better check the type of error. In some cases
 913                          * (search ?) it might be better to return a
 914                          * success if at least one of the targets gave
 915                          * positive result ...
 916                          */
 917                         ldap_get_option( msc->msc_ld,
 918                                         LDAP_OPT_ERROR_STRING, &rmsg );
 919                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 920                                 ldap_memfree( rmsg );
 921                                 rmsg = NULL;
 922                         }
 923
 924                         ldap_get_option( msc->msc_ld,
 925                                         LDAP_OPT_MATCHED_DN, &rmatch );
 926                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 927                                 ldap_memfree( rmatch );
 928                                 rmatch = NULL;
 929                         }
 930
 931                         rerr = rs->sr_err = slap_map_api2result( rs );
 932
 933                         Debug(LDAP_DEBUG_ANY,
 934                                         "==> meta_back_op_result: target"
 935                                         " <%d> sending msg \"%s\""
 936                                         " (matched \"%s\")\n",
 937                                         candidate, ( rmsg ? rmsg : "" ),
 938                                         ( rmatch ? rmatch : "" ) );
 939                 }
 940
 941         } else {
 942                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 943                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 944                         char                    *msg = NULL;
 945                         char                    *match = NULL;
 946
 947                         rs->sr_err = LDAP_SUCCESS;
 948
 949                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 950                         if ( rs->sr_err != LDAP_SUCCESS ) {
 951                                 /*
 952                                  * better check the type of error. In some cases
 953                                  * (search ?) it might be better to return a
 954                                  * success if at least one of the targets gave
 955                                  * positive result ...
 956                                  */
 957                                 ldap_get_option( msc->msc_ld,
 958                                                 LDAP_OPT_ERROR_STRING, &msg );
 959                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 960                                         ldap_memfree( msg );
 961                                         msg = NULL;
 962                                 }
 963
 964                                 ldap_get_option( msc->msc_ld,
 965                                                 LDAP_OPT_MATCHED_DN, &match );
 966                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 967                                         ldap_memfree( match );
 968                                         match = NULL;
 969                                 }
 970
 971                                 rs->sr_err = slap_map_api2result( rs );
 972
 973                                 Debug(LDAP_DEBUG_ANY,
 974                                                 "==> meta_back_op_result: target"
 975                                                 " <%d> sending msg \"%s\""
 976                                                 " (matched \"%s\")\n",
 977                                                 i, ( msg ? msg : "" ),
 978                                                 ( match ? match : "" ) );
 979
 980                                 /*
 981                                  * FIXME: need to rewrite "match" (need rwinfo)
 982                                  */
 983                                 switch ( rs->sr_err ) {
 984                                 default:
 985                                         rerr = rs->sr_err;
 986                                         if ( msg != NULL ) {
 987                                                 if ( rmsg ) {
 988                                                         ldap_memfree( rmsg );
 989                                                 }
 990                                                 rmsg = msg;
 991                                                 msg = NULL;
 992                                         }
 993                                         if ( match != NULL ) {
 994                                                 if ( rmatch ) {
 995                                                         ldap_memfree( rmatch );
 996                                                 }
 997                                                 rmatch = match;
 998                                                 match = NULL;
 999                                         }
1000                                         break;
1001                                 }
1002
1003                                 if ( msg ) {
1004                                         ldap_memfree( msg );
1005                                 }
1006
1007                                 if ( match ) {
1008                                         ldap_memfree( match );
1009                                 }
1010                         }
1011                 }
1012         }
1013
1014         rs->sr_err = rerr;
1015         if ( rmsg != NULL ) {
1016                 save_rmsg = rs->sr_text;
1017                 rs->sr_text = rmsg;
1018         }
1019         if ( rmatch != NULL ) {
1020                 struct berval   dn, pdn;
1021
1022                 ber_str2bv( rmatch, 0, 0, &dn );
1023                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1024                         ldap_memfree( rmatch );
1025                         rmatch_ctx = op->o_tmpmemctx;
1026                         rmatch = pdn.bv_val;
1027                 }
1028                 save_rmatch = rs->sr_matched;
1029                 rs->sr_matched = rmatch;
1030         }
1031         send_ldap_result( op, rs );
1032         if ( rmsg != NULL ) {
1033                 ber_memfree( rmsg );
1034                 rs->sr_text = save_rmsg;
1035         }
1036         if ( rmatch != NULL ) {
1037                 ber_memfree_x( rmatch, rmatch_ctx );
1038                 rs->sr_matched = save_rmatch;
1039         }
1040
1041         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
1042 }
1043