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