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                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 211                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 212                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 213                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 214                         if ( lerr == -1 ) {
 215                                 meta_clear_candidates( op, mc );
 216
 217                                 /* we can do this because mc_refcnt == 1 */
 218                                 mc->mc_refcnt = 0;
 219                                 meta_back_conn_free( mc );
 220                                 mc = NULL;
 221                         }
 222                 }
 223         }
 224
 225         if ( mc != NULL ) {
 226                 meta_back_release_conn( op, mc );
 227         }
 228
 229         /*
 230          * rc is LDAP_SUCCESS if at least one bind succeeded,
 231          * err is the last error that occurred during a bind;
 232          * if at least (and at most?) one bind succeeds, fine.
 233          */
 234         if ( rc != LDAP_SUCCESS ) {
 235
 236                 /*
 237                  * deal with bind failure ...
 238                  */
 239
 240                 /*
 241                  * no target was found within the naming context,
 242                  * so bind must fail with invalid credentials
 243                  */
 244                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 245                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 246                 } else {
 247                         rs->sr_err = slap_map_api2result( rs );
 248                 }
 249                 send_ldap_result( op, rs );
 250                 return rs->sr_err;
 251
 252         }
 253
 254         return LDAP_SUCCESS;
 255 }
 256
 257 /*
 258  * meta_back_single_bind
 259  *
 260  * attempts to perform a bind with creds
 261  */
 262 int
 263 meta_back_single_bind(
 264         Operation               *op,
 265         SlapReply               *rs,
 266         metaconn_t              *mc,
 267         int                     candidate,
 268         int                     massage )
 269 {
 270         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 271         metatarget_t            *mt = mi->mi_targets[ candidate ];
 272         struct berval           mdn = BER_BVNULL;
 273         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 274         int                     msgid,
 275                                 rebinding = 0;
 276
 277
 278         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 279                 ch_free( msc->msc_bound_ndn.bv_val );
 280                 BER_BVZERO( &msc->msc_bound_ndn );
 281         }
 282
 283         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 284                 /* destroy sensitive data */
 285                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 286                 ch_free( msc->msc_cred.bv_val );
 287                 BER_BVZERO( &msc->msc_cred );
 288         }
 289
 290         /*
 291          * Rewrite the bind dn if needed
 292          */
 293         if ( massage ) {
 294                 dncookie                dc;
 295
 296                 dc.target = mt;
 297                 dc.conn = op->o_conn;
 298                 dc.rs = rs;
 299                 dc.ctx = "bindDN";
 300
 301                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 302                         rs->sr_text = "DN rewrite error";
 303                         rs->sr_err = LDAP_OTHER;
 304                         return rs->sr_err;
 305                 }
 306
 307         } else {
 308                 mdn = op->o_req_dn;
 309         }
 310
 311         /* FIXME: this fixes the bind problem right now; we need
 312          * to use the asynchronous version to get the "matched"
 313          * and more in case of failure ... */
 314         /* FIXME: should we check if at least some of the op->o_ctrls
 315          * can/should be passed? */
 316 rebind:;
 317         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 318                         LDAP_SASL_SIMPLE, &op->orb_cred,
 319                         op->o_ctrls, NULL, &msgid );
 320         if ( rs->sr_err == LDAP_SUCCESS ) {
 321                 LDAPMessage     *res;
 322                 struct timeval  tv;
 323                 int             rc;
 324                 int             nretries = mt->mt_nretries;
 325                 char            buf[ SLAP_TEXT_BUFLEN ];
 326
 327                 LDAP_BACK_TV_SET( &tv );
 328
 329                 /*
 330                  * handle response!!!
 331                  */
 332 retry:;
 333                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 334                 case 0:
 335                         snprintf( buf, sizeof( buf ),
 336                                 "ldap_result=0 nretries=%d%s",
 337                                 nretries, rebinding ? " rebinding" : "" );
 338                         Debug( LDAP_DEBUG_ANY,
 339                                 "%s meta_back_single_bind[%d]: %s.\n",
 340                                 op->o_log_prefix, candidate, buf );
 341
 342                         if ( nretries != META_RETRY_NEVER ) {
 343                                 ldap_pvt_thread_yield();
 344                                 if ( nretries > 0 ) {
 345                                         nretries--;
 346                                 }
 347                                 tv = mt->mt_bind_timeout;
 348                                 goto retry;
 349                         }
 350
 351                         rs->sr_err = LDAP_BUSY;
 352                         if ( rebinding ) {
 353                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 354                                 break;
 355                         }
 356
 357                         /* FIXME: some times the request times out
 358                          * while the other party is not willing to
 359                          * send a response any more.  Give it a second
 360                          * chance with a freshly bound connection */
 361                         rebinding = 1;
 362                         nretries = mt->mt_nretries;
 363                         /* fallthru */
 364
 365                 case -1:
 366                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 367                                 &rs->sr_err );
 368
 369                         if ( rebinding ) {
 370                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 371                         }
 372
 373                         snprintf( buf, sizeof( buf ),
 374                                 "err=%d (%s) nretries=%d",
 375                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 376                         Debug( LDAP_DEBUG_ANY,
 377                                 "### %s meta_back_single_bind[%d]: %s.\n",
 378                                 op->o_log_prefix, candidate, buf );
 379
 380                         rc = slap_map_api2result( rs );
 381                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 382                                 rc = meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND );
 383                                 if ( rc ) {
 384                                         if ( nretries > 0 ) {
 385                                                 nretries--;
 386                                         }
 387                                         ldap_pvt_thread_yield();
 388                                         goto rebind;
 389                                 }
 390                                 goto return_results;
 391                         }
 392                         break;
 393
 394                 default:
 395                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 396                                         NULL, NULL, NULL, NULL, 1 );
 397                         if ( rc != LDAP_SUCCESS ) {
 398                                 rs->sr_err = rc;
 399                         }
 400                         break;
 401                 }
 402         }
 403
 404         if ( rs->sr_err != LDAP_SUCCESS ) {
 405                 rs->sr_err = slap_map_api2result( rs );
 406                 goto return_results;
 407         }
 408
 409         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 410         LDAP_BACK_CONN_ISBOUND_SET( msc );
 411         mc->mc_authz_target = candidate;
 412
 413         if ( LDAP_BACK_SAVECRED( mi ) ) {
 414                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 415                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 416         }
 417
 418         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 419                         && op->o_req_ndn.bv_len != 0 )
 420         {
 421                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 422                                 &op->o_req_ndn, candidate );
 423         }
 424
 425 return_results:;
 426         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 427                 free( mdn.bv_val );
 428         }
 429
 430         return rs->sr_err;
 431 }
 432
 433 /*
 434  * meta_back_single_dobind
 435  */
 436 int
 437 meta_back_single_dobind(
 438         Operation               *op,
 439         SlapReply               *rs,
 440         metaconn_t              **mcp,
 441         int                     candidate,
 442         ldap_back_send_t        sendok,
 443         int                     nretries,
 444         int                     dolock )
 445 {
 446         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 447         metatarget_t            *mt = mi->mi_targets[ candidate ];
 448         metaconn_t              *mc = *mcp;
 449         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 450         int                     rc;
 451         static struct berval    cred = BER_BVC( "" );
 452         int                     msgid,
 453                                 rebinding = 0,
 454                                 save_nretries = nretries;
 455
 456         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 457
 458         /*
 459          * meta_back_single_dobind() calls meta_back_single_bind()
 460          * if required.
 461          */
 462         if ( be_isroot( op ) && !BER_BVISNULL( &mt->mt_pseudorootdn ) )
 463         {
 464                 Operation       op2 = *op;
 465
 466                 op2.o_tag = LDAP_REQ_BIND;
 467                 op2.o_req_dn = mt->mt_pseudorootdn;
 468                 op2.o_req_ndn = mt->mt_pseudorootdn;
 469                 op2.orb_cred = mt->mt_pseudorootpw;
 470                 op2.orb_method = LDAP_AUTH_SIMPLE;
 471
 472                 rc = meta_back_single_bind( &op2, rs, *mcp, candidate, 0 );
 473                 goto done;
 474         }
 475
 476         /*
 477          * Otherwise an anonymous bind is performed
 478          * (note: if the target was already bound, the anonymous
 479          * bind clears the previous bind).
 480          */
 481         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 482                 ber_memfree( msc->msc_bound_ndn.bv_val );
 483                 BER_BVZERO( &msc->msc_bound_ndn );
 484         }
 485
 486         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 487                 /* destroy sensitive data */
 488                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 489                 ber_memfree( msc->msc_cred.bv_val );
 490                 BER_BVZERO( &msc->msc_cred );
 491         }
 492
 493         /* FIXME: should we check if at least some of the op->o_ctrls
 494          * can/should be passed? */
 495 rebind:;
 496         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 497                         NULL, NULL, &msgid );
 498         if ( rc == LDAP_SUCCESS ) {
 499                 LDAPMessage     *res;
 500                 struct timeval  tv;
 501                 char            buf[ SLAP_TEXT_BUFLEN ];
 502
 503                 LDAP_BACK_TV_SET( &tv );
 504
 505                 /*
 506                  * handle response!!!
 507                  */
 508 retry:;
 509                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 510                 case 0:
 511                         snprintf( buf, sizeof( buf ),
 512                                 "ldap_result=0 nretries=%d%s",
 513                                 nretries, rebinding ? " rebinding" : "" );
 514                         Debug( LDAP_DEBUG_ANY,
 515                                 "%s meta_back_single_dobind[%d]: %s.\n",
 516                                 op->o_log_prefix, candidate, buf );
 517
 518                         if ( nretries != META_RETRY_NEVER ) {
 519                                 ldap_pvt_thread_yield();
 520                                 if ( nretries > 0 ) {
 521                                         nretries--;
 522                                 }
 523                                 tv = mt->mt_bind_timeout;
 524                                 goto retry;
 525                         }
 526
 527                         rc = LDAP_BUSY;
 528                         if ( rebinding ) {
 529                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 530                                 break;
 531                         }
 532
 533                         /* FIXME: some times the request times out
 534                          * while the other party is not willing to
 535                          * send a response any more.  Give it a second
 536                          * chance with a freshly bound connection */
 537                         rebinding = 1;
 538                         nretries = save_nretries;
 539                         /* fallthru */
 540
 541                 case -1:
 542                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 543                                 &rs->sr_err );
 544
 545                         if ( rebinding ) {
 546                                 ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 547                         }
 548
 549                         snprintf( buf, sizeof( buf ),
 550                                 "err=%d (%s) nretries=%d",
 551                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 552                         Debug( LDAP_DEBUG_ANY,
 553                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 554                                 op->o_log_prefix, candidate, buf );
 555
 556                         rc = slap_map_api2result( rs );
 557                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 558                                 if ( dolock ) {
 559                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 560                                 }
 561
 562                                 if ( mc->mc_refcnt == 1 ) {
 563                                         meta_clear_one_candidate( msc );
 564                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 565
 566                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 567
 568                                         /* mc here must be the regular mc,
 569                                          * reset and ready for init */
 570                                         rc = meta_back_init_one_conn( op, rs,
 571                                                 mt, mc, candidate,
 572                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 573                                                 LDAP_BACK_DONTSEND );
 574                                         if ( rc == LDAP_SUCCESS ) {
 575                                                 LDAP_BACK_CONN_BINDING_SET( msc );
 576                                         }
 577
 578                                 } else {
 579                                         /* can't do anything about it */
 580                                         rc = LDAP_UNAVAILABLE;
 581                                 }
 582
 583                                 if ( dolock ) {
 584                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 585                                 }
 586
 587                                 if ( rc == LDAP_SUCCESS ) {
 588                                         ldap_pvt_thread_yield();
 589                                         if ( nretries > 0 ) {
 590                                                 nretries--;
 591                                         }
 592                                         goto rebind;
 593                                 }
 594                         }
 595                         break;
 596
 597                 default:
 598                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 599                                         NULL, NULL, NULL, NULL, 1 );
 600                         if ( rc == LDAP_SUCCESS ) {
 601                                 rc = slap_map_api2result( rs );
 602                         }
 603                         break;
 604                 }
 605
 606         } else {
 607                 rs->sr_err = rc;
 608                 rc = slap_map_api2result( rs );
 609         }
 610
 611 done:;
 612         rs->sr_err = rc;
 613         if ( rc != LDAP_SUCCESS && META_BACK_ONERR_STOP( mi ) ) {
 614                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 615                 LDAP_BACK_CONN_TAINTED_SET( mc );
 616                 meta_back_release_conn_lock( op, mc, dolock );
 617                 *mcp = NULL;
 618
 619                 if ( sendok & LDAP_BACK_SENDERR ) {
 620                         send_ldap_result( op, rs );
 621                 }
 622         }
 623
 624         return rc;
 625 }
 626
 627 /*
 628  * meta_back_dobind
 629  */
 630 int
 631 meta_back_dobind(
 632         Operation               *op,
 633         SlapReply               *rs,
 634         metaconn_t              *mc,
 635         ldap_back_send_t        sendok )
 636 {
 637         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 638
 639         int                     bound = 0,
 640                                 i,
 641                                 isroot = 0;
 642
 643         SlapReply               *candidates = meta_back_candidates_get( op );
 644
 645         if ( be_isroot( op ) ) {
 646                 isroot = 1;
 647         }
 648
 649         Debug( LDAP_DEBUG_TRACE,
 650                 "%s meta_back_dobind: conn=%ld%s\n",
 651                 op->o_log_prefix,
 652                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 653                 isroot ? " (isroot)" : "" );
 654
 655         /*
 656          * all the targets are bound as pseudoroot
 657          */
 658         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 659                 bound = 1;
 660                 goto done;
 661         }
 662
 663         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 664                 metatarget_t            *mt = mi->mi_targets[ i ];
 665                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 666                 int                     rc, do_retry = 1;
 667
 668                 /*
 669                  * Not a candidate
 670                  */
 671                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 672                         continue;
 673                 }
 674
 675                 assert( msc->msc_ld != NULL );
 676
 677                 /*
 678                  * If the target is already bound it is skipped
 679                  */
 680
 681 retry_binding:;
 682                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 683                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 684                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 685                         ++bound;
 686                         continue;
 687
 688                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 689                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 690                         ldap_pvt_thread_yield();
 691                         goto retry_binding;
 692
 693                 } else {
 694                         LDAP_BACK_CONN_BINDING_SET( msc );
 695                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 696                 }
 697
 698 retry:;
 699                 rc = meta_back_single_dobind( op, rs, &mc, i,
 700                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 701                 /*
 702                  * NOTE: meta_back_single_dobind() already retries;
 703                  * in case of failure, it resets mc...
 704                  */
 705                 if ( rc != LDAP_SUCCESS ) {
 706                         char            buf[ SLAP_TEXT_BUFLEN ];
 707
 708                         if ( mc == NULL ) {
 709                                 /* meta_back_single_dobind() already sent
 710                                  * response and released connection */
 711                                 goto send_err;
 712                         }
 713
 714
 715                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 716                                 do_retry = 0;
 717                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 718                                         goto retry;
 719                                 }
 720
 721                                 if ( mc != NULL ) {
 722                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 723                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 724                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 725                                 }
 726
 727                                 return 0;
 728                         }
 729
 730                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 731                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 732                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 733
 734                         snprintf( buf, sizeof( buf ),
 735                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 736                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 737                                 rc, ldap_err2string( rc ) );
 738                         Debug( LDAP_DEBUG_ANY,
 739                                 "%s %s\n",
 740                                 op->o_log_prefix, buf, 0 );
 741
 742                         /*
 743                          * null cred bind should always succeed
 744                          * as anonymous, so a failure means
 745                          * the target is no longer candidate possibly
 746                          * due to technical reasons (remote host down?)
 747                          * so better clear the handle
 748                          */
 749                         /* leave the target candidate, but record the error for later use */
 750                         candidates[ i ].sr_err = rc;
 751                         if ( META_BACK_ONERR_STOP( mi ) ) {
 752                                 bound = 0;
 753                                 goto done;
 754                         }
 755
 756                         continue;
 757                 } /* else */
 758
 759                 Debug( LDAP_DEBUG_TRACE,
 760                         "%s meta_back_dobind[%d]: "
 761                         "(%s)\n",
 762                         op->o_log_prefix, i,
 763                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 764
 765                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 766                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 767                 if ( isroot ) {
 768                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 769                 } else {
 770                         LDAP_BACK_CONN_ISANON_SET( msc );
 771                 }
 772                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 773                 ++bound;
 774         }
 775
 776 done:;
 777         Debug( LDAP_DEBUG_TRACE,
 778                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 779                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 780
 781         if ( bound == 0 ) {
 782                 meta_back_release_conn( op, mc );
 783
 784 send_err:;
 785                 if ( sendok & LDAP_BACK_SENDERR ) {
 786                         if ( rs->sr_err == LDAP_SUCCESS ) {
 787                                 rs->sr_err = LDAP_BUSY;
 788                         }
 789                         send_ldap_result( op, rs );
 790                 }
 791
 792                 return 0;
 793         }
 794
 795         return ( bound > 0 );
 796 }
 797
 798 /*
 799  * meta_back_default_rebind
 800  *
 801  * This is a callback used for chasing referrals using the same
 802  * credentials as the original user on this session.
 803  */
 804 int
 805 meta_back_default_rebind(
 806         LDAP                    *ld,
 807         LDAP_CONST char         *url,
 808         ber_tag_t               request,
 809         ber_int_t               msgid,
 810         void                    *params )
 811 {
 812         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 813
 814         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 815                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 816                         NULL, NULL, NULL );
 817 }
 818
 819 /*
 820  * meta_back_default_urllist
 821  *
 822  * This is a callback used for mucking with the urllist
 823  */
 824 int
 825 meta_back_default_urllist(
 826         LDAP            *ld,
 827         LDAPURLDesc     **urllist,
 828         LDAPURLDesc     **url,
 829         void            *params )
 830 {
 831         metatarget_t    *mt = (metatarget_t *)params;
 832         LDAPURLDesc     **urltail;
 833
 834         if ( urllist == url ) {
 835                 return LDAP_SUCCESS;
 836         }
 837
 838         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 839                 /* count */ ;
 840
 841         *urltail = *urllist;
 842         *urllist = *url;
 843         *url = NULL;
 844
 845         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 846         if ( mt->mt_uri ) {
 847                 ch_free( mt->mt_uri );
 848         }
 849
 850         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 851         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 852
 853         return LDAP_SUCCESS;
 854 }
 855
 856 /*
 857  * FIXME: error return must be handled in a cleaner way ...
 858  */
 859 int
 860 meta_back_op_result(
 861         metaconn_t      *mc,
 862         Operation       *op,
 863         SlapReply       *rs,
 864         int             candidate )
 865 {
 866         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 867
 868         int                     i,
 869                                 rerr = LDAP_SUCCESS;
 870         char                    *rmsg = NULL,
 871                                 *rmatch = NULL;
 872         const char              *save_rmsg = NULL,
 873                                 *save_rmatch = NULL;
 874         void                    *rmatch_ctx = NULL;
 875
 876         assert( mc != NULL );
 877
 878         if ( candidate != META_TARGET_NONE ) {
 879                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 880
 881                 rs->sr_err = LDAP_SUCCESS;
 882
 883                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 884                 if ( rs->sr_err != LDAP_SUCCESS ) {
 885                         /*
 886                          * better check the type of error. In some cases
 887                          * (search ?) it might be better to return a
 888                          * success if at least one of the targets gave
 889                          * positive result ...
 890                          */
 891                         ldap_get_option( msc->msc_ld,
 892                                         LDAP_OPT_ERROR_STRING, &rmsg );
 893                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 894                                 ldap_memfree( rmsg );
 895                                 rmsg = NULL;
 896                         }
 897
 898                         ldap_get_option( msc->msc_ld,
 899                                         LDAP_OPT_MATCHED_DN, &rmatch );
 900                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 901                                 ldap_memfree( rmatch );
 902                                 rmatch = NULL;
 903                         }
 904
 905                         rerr = rs->sr_err = slap_map_api2result( rs );
 906
 907                         Debug(LDAP_DEBUG_ANY,
 908                                         "==> meta_back_op_result: target"
 909                                         " <%d> sending msg \"%s\""
 910                                         " (matched \"%s\")\n",
 911                                         candidate, ( rmsg ? rmsg : "" ),
 912                                         ( rmatch ? rmatch : "" ) );
 913                 }
 914
 915         } else {
 916                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 917                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 918                         char                    *msg = NULL;
 919                         char                    *match = NULL;
 920
 921                         rs->sr_err = LDAP_SUCCESS;
 922
 923                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 924                         if ( rs->sr_err != LDAP_SUCCESS ) {
 925                                 /*
 926                                  * better check the type of error. In some cases
 927                                  * (search ?) it might be better to return a
 928                                  * success if at least one of the targets gave
 929                                  * positive result ...
 930                                  */
 931                                 ldap_get_option( msc->msc_ld,
 932                                                 LDAP_OPT_ERROR_STRING, &msg );
 933                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
 934                                         ldap_memfree( msg );
 935                                         msg = NULL;
 936                                 }
 937
 938                                 ldap_get_option( msc->msc_ld,
 939                                                 LDAP_OPT_MATCHED_DN, &match );
 940                                 if ( match != NULL && match[ 0 ] == '\0' ) {
 941                                         ldap_memfree( match );
 942                                         match = NULL;
 943                                 }
 944
 945                                 rs->sr_err = slap_map_api2result( rs );
 946
 947                                 Debug(LDAP_DEBUG_ANY,
 948                                                 "==> meta_back_op_result: target"
 949                                                 " <%d> sending msg \"%s\""
 950                                                 " (matched \"%s\")\n",
 951                                                 i, ( msg ? msg : "" ),
 952                                                 ( match ? match : "" ) );
 953
 954                                 /*
 955                                  * FIXME: need to rewrite "match" (need rwinfo)
 956                                  */
 957                                 switch ( rs->sr_err ) {
 958                                 default:
 959                                         rerr = rs->sr_err;
 960                                         if ( msg != NULL ) {
 961                                                 if ( rmsg ) {
 962                                                         ldap_memfree( rmsg );
 963                                                 }
 964                                                 rmsg = msg;
 965                                                 msg = NULL;
 966                                         }
 967                                         if ( match != NULL ) {
 968                                                 if ( rmatch ) {
 969                                                         ldap_memfree( rmatch );
 970                                                 }
 971                                                 rmatch = match;
 972                                                 match = NULL;
 973                                         }
 974                                         break;
 975                                 }
 976
 977                                 if ( msg ) {
 978                                         ldap_memfree( msg );
 979                                 }
 980
 981                                 if ( match ) {
 982                                         ldap_memfree( match );
 983                                 }
 984                         }
 985                 }
 986         }
 987
 988         rs->sr_err = rerr;
 989         if ( rmsg != NULL ) {
 990                 save_rmsg = rs->sr_text;
 991                 rs->sr_text = rmsg;
 992         }
 993         if ( rmatch != NULL ) {
 994                 struct berval   dn, pdn;
 995
 996                 ber_str2bv( rmatch, 0, 0, &dn );
 997                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 998                         ldap_memfree( rmatch );
 999                         rmatch_ctx = op->o_tmpmemctx;
1000                         rmatch = pdn.bv_val;
1001                 }
1002                 save_rmatch = rs->sr_matched;
1003                 rs->sr_matched = rmatch;
1004         }
1005         send_ldap_result( op, rs );
1006         if ( rmsg != NULL ) {
1007                 ber_memfree( rmsg );
1008                 rs->sr_text = save_rmsg;
1009         }
1010         if ( rmatch != NULL ) {
1011                 ber_memfree_x( rmatch, rmatch_ctx );
1012                 rs->sr_matched = save_rmatch;
1013         }
1014
1015         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
1016 }
1017