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