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 ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 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                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 181                         break;
 182                 }
 183         }
 184
 185         /* must re-insert if local DN changed as result of bind */
 186         if ( rc == LDAP_SUCCESS ) {
 187                 if ( isroot ) {
 188                         mc->mc_authz_target = META_BOUND_ALL;
 189                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 190                 }
 191
 192                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 193                         metaconn_t      *tmpmc;
 194                         int             lerr;
 195
 196                         /* wait for all other ops to release the connection */
 197 retry_lock:;
 198                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 199                         if ( mc->mc_refcnt > 1 ) {
 200                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 201                                 ldap_pvt_thread_yield();
 202                                 goto retry_lock;
 203                         }
 204
 205                         assert( mc->mc_refcnt == 1 );
 206                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 207                                 meta_back_conndn_cmp );
 208                         assert( tmpmc == mc );
 209
 210                         /* delete all cached connections with the current connection */
 211                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 212                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 213                                 {
 214                                         Debug( LDAP_DEBUG_TRACE,
 215                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 216                                                 LDAP_BACK_PCONN_ID( mc->mc_conn ), mc->mc_refcnt, 0 );
 217
 218                                         if ( mc->mc_refcnt != 0 ) {
 219                                                 /* taint it */
 220                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 221
 222                                         } else {
 223                                                 /*
 224                                                  * Needs a test because the handler may be corrupted,
 225                                                  * and calling ldap_unbind on a corrupted header results
 226                                                  * in a segmentation fault
 227                                                  */
 228                                                 meta_back_conn_free( tmpmc );
 229                                         }
 230                                 }
 231                         }
 232
 233                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 234                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 235                                 mc->mc_conn = LDAP_BACK_PCONN_SET( op );
 236                         }
 237                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 238                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 239                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 240                         if ( lerr == -1 ) {
 241                                 meta_clear_candidates( op, mc );
 242
 243                                 /* we can do this because mc_refcnt == 1 */
 244                                 mc->mc_refcnt = 0;
 245                                 meta_back_conn_free( mc );
 246                                 mc = NULL;
 247                         }
 248                 }
 249         }
 250
 251         if ( mc != NULL ) {
 252                 meta_back_release_conn( op, mc );
 253         }
 254
 255         /*
 256          * rc is LDAP_SUCCESS if at least one bind succeeded,
 257          * err is the last error that occurred during a bind;
 258          * if at least (and at most?) one bind succeeds, fine.
 259          */
 260         if ( rc != LDAP_SUCCESS ) {
 261
 262                 /*
 263                  * deal with bind failure ...
 264                  */
 265
 266                 /*
 267                  * no target was found within the naming context,
 268                  * so bind must fail with invalid credentials
 269                  */
 270                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 271                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 272                 } else {
 273                         rs->sr_err = slap_map_api2result( rs );
 274                 }
 275                 send_ldap_result( op, rs );
 276                 return rs->sr_err;
 277
 278         }
 279
 280         return LDAP_SUCCESS;
 281 }
 282
 283 /*
 284  * meta_back_single_bind
 285  *
 286  * attempts to perform a bind with creds
 287  */
 288 int
 289 meta_back_single_bind(
 290         Operation               *op,
 291         SlapReply               *rs,
 292         metaconn_t              *mc,
 293         int                     candidate,
 294         int                     massage )
 295 {
 296         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 297         metatarget_t            *mt = mi->mi_targets[ candidate ];
 298         struct berval           mdn = BER_BVNULL;
 299         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 300         int                     msgid,
 301                                 rebinding = 0;
 302
 303
 304         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 305                 ch_free( msc->msc_bound_ndn.bv_val );
 306                 BER_BVZERO( &msc->msc_bound_ndn );
 307         }
 308
 309         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 310                 /* destroy sensitive data */
 311                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 312                 ch_free( msc->msc_cred.bv_val );
 313                 BER_BVZERO( &msc->msc_cred );
 314         }
 315
 316         /*
 317          * Rewrite the bind dn if needed
 318          */
 319         if ( massage ) {
 320                 dncookie                dc;
 321
 322                 dc.target = mt;
 323                 dc.conn = op->o_conn;
 324                 dc.rs = rs;
 325                 dc.ctx = "bindDN";
 326
 327                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 328                         rs->sr_text = "DN rewrite error";
 329                         rs->sr_err = LDAP_OTHER;
 330                         return rs->sr_err;
 331                 }
 332
 333         } else {
 334                 mdn = op->o_req_dn;
 335         }
 336
 337         /* FIXME: this fixes the bind problem right now; we need
 338          * to use the asynchronous version to get the "matched"
 339          * and more in case of failure ... */
 340         /* FIXME: should we check if at least some of the op->o_ctrls
 341          * can/should be passed? */
 342 rebind:;
 343         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 344                         LDAP_SASL_SIMPLE, &op->orb_cred,
 345                         op->o_ctrls, NULL, &msgid );
 346         if ( rs->sr_err == LDAP_SUCCESS ) {
 347                 LDAPMessage     *res;
 348                 struct timeval  tv;
 349                 int             rc;
 350                 int             nretries = mt->mt_nretries;
 351                 char            buf[ SLAP_TEXT_BUFLEN ];
 352
 353                 LDAP_BACK_TV_SET( &tv );
 354
 355                 /*
 356                  * handle response!!!
 357                  */
 358 retry:;
 359                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 360                 case 0:
 361                         snprintf( buf, sizeof( buf ),
 362                                 "ldap_result=0 nretries=%d%s",
 363                                 nretries, rebinding ? " rebinding" : "" );
 364                         Debug( LDAP_DEBUG_ANY,
 365                                 "%s meta_back_single_bind[%d]: %s.\n",
 366                                 op->o_log_prefix, candidate, buf );
 367
 368                         if ( nretries != META_RETRY_NEVER ) {
 369                                 ldap_pvt_thread_yield();
 370                                 if ( nretries > 0 ) {
 371                                         nretries--;
 372                                 }
 373                                 tv = mt->mt_bind_timeout;
 374                                 goto retry;
 375                         }
 376
 377                         rs->sr_err = LDAP_BUSY;
 378                         if ( rebinding ) {
 379                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 380                                 break;
 381                         }
 382
 383                         /* FIXME: some times the request times out
 384                          * while the other party is not willing to
 385                          * send a response any more.  Give it a second
 386                          * chance with a freshly bound connection */
 387                         rebinding = 1;
 388                         nretries = mt->mt_nretries;
 389                         /* fallthru */
 390
 391                 case -1:
 392                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 393                                 &rs->sr_err );
 394
 395                         if ( rebinding ) {
 396                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 397                         }
 398
 399                         snprintf( buf, sizeof( buf ),
 400                                 "err=%d (%s) nretries=%d",
 401                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 402                         Debug( LDAP_DEBUG_ANY,
 403                                 "### %s meta_back_single_bind[%d]: %s.\n",
 404                                 op->o_log_prefix, candidate, buf );
 405
 406                         rc = slap_map_api2result( rs );
 407                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 408                                 rc = meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND );
 409                                 if ( rc ) {
 410                                         if ( nretries > 0 ) {
 411                                                 nretries--;
 412                                         }
 413                                         ldap_pvt_thread_yield();
 414                                         goto rebind;
 415                                 }
 416                                 goto return_results;
 417                         }
 418                         break;
 419
 420                 default:
 421                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 422                                         NULL, NULL, NULL, NULL, 1 );
 423                         if ( rc != LDAP_SUCCESS ) {
 424                                 rs->sr_err = rc;
 425                         }
 426                         break;
 427                 }
 428         }
 429
 430         if ( rs->sr_err != LDAP_SUCCESS ) {
 431                 rs->sr_err = slap_map_api2result( rs );
 432                 goto return_results;
 433         }
 434
 435         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 436         LDAP_BACK_CONN_ISBOUND_SET( msc );
 437         mc->mc_authz_target = candidate;
 438
 439         if ( LDAP_BACK_SAVECRED( mi ) ) {
 440                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 441                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 442         }
 443
 444         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 445                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 446         {
 447                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 448                                 &op->o_req_ndn, candidate );
 449         }
 450
 451 return_results:;
 452         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 453                 free( mdn.bv_val );
 454         }
 455
 456         if ( META_BACK_QUARANTINE( mi ) ) {
 457                 meta_back_quarantine( op, rs, candidate, 1 );
 458         }
 459
 460         return rs->sr_err;
 461 }
 462
 463 /*
 464  * meta_back_single_dobind
 465  */
 466 int
 467 meta_back_single_dobind(
 468         Operation               *op,
 469         SlapReply               *rs,
 470         metaconn_t              **mcp,
 471         int                     candidate,
 472         ldap_back_send_t        sendok,
 473         int                     nretries,
 474         int                     dolock )
 475 {
 476         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 477         metatarget_t            *mt = mi->mi_targets[ candidate ];
 478         metaconn_t              *mc = *mcp;
 479         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 480         int                     rc;
 481         static struct berval    cred = BER_BVC( "" );
 482         int                     msgid,
 483                                 rebinding = 0,
 484                                 save_nretries = nretries;
 485
 486         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 487
 488         /*
 489          * meta_back_single_dobind() calls meta_back_single_bind()
 490          * if required.
 491          */
 492         if ( be_isroot( op ) && !BER_BVISNULL( &mt->mt_pseudorootdn ) )
 493         {
 494                 Operation       op2 = *op;
 495
 496                 op2.o_tag = LDAP_REQ_BIND;
 497                 op2.o_req_dn = mt->mt_pseudorootdn;
 498                 op2.o_req_ndn = mt->mt_pseudorootdn;
 499                 op2.orb_cred = mt->mt_pseudorootpw;
 500                 op2.orb_method = LDAP_AUTH_SIMPLE;
 501
 502                 rc = meta_back_single_bind( &op2, rs, *mcp, candidate, 0 );
 503                 goto done;
 504         }
 505
 506         /*
 507          * Otherwise an anonymous bind is performed
 508          * (note: if the target was already bound, the anonymous
 509          * bind clears the previous bind).
 510          */
 511         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 512                 ber_memfree( msc->msc_bound_ndn.bv_val );
 513                 BER_BVZERO( &msc->msc_bound_ndn );
 514         }
 515
 516         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 517                 /* destroy sensitive data */
 518                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 519                 ber_memfree( msc->msc_cred.bv_val );
 520                 BER_BVZERO( &msc->msc_cred );
 521         }
 522
 523         /* FIXME: should we check if at least some of the op->o_ctrls
 524          * can/should be passed? */
 525 rebind:;
 526         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 527                         NULL, NULL, &msgid );
 528         if ( rc == LDAP_SUCCESS ) {
 529                 LDAPMessage     *res;
 530                 struct timeval  tv;
 531                 char            buf[ SLAP_TEXT_BUFLEN ];
 532
 533                 LDAP_BACK_TV_SET( &tv );
 534
 535                 /*
 536                  * handle response!!!
 537                  */
 538 retry:;
 539                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 540                 case 0:
 541                         snprintf( buf, sizeof( buf ),
 542                                 "ldap_result=0 nretries=%d%s",
 543                                 nretries, rebinding ? " rebinding" : "" );
 544                         Debug( LDAP_DEBUG_ANY,
 545                                 "%s meta_back_single_dobind[%d]: %s.\n",
 546                                 op->o_log_prefix, candidate, buf );
 547
 548                         if ( nretries != META_RETRY_NEVER ) {
 549                                 ldap_pvt_thread_yield();
 550                                 if ( nretries > 0 ) {
 551                                         nretries--;
 552                                 }
 553                                 tv = mt->mt_bind_timeout;
 554                                 goto retry;
 555                         }
 556
 557                         rc = LDAP_BUSY;
 558                         if ( rebinding ) {
 559                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 560                                 break;
 561                         }
 562
 563                         /* FIXME: some times the request times out
 564                          * while the other party is not willing to
 565                          * send a response any more.  Give it a second
 566                          * chance with a freshly bound connection */
 567                         rebinding = 1;
 568                         nretries = save_nretries;
 569                         /* fallthru */
 570
 571                 case -1:
 572                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 573                                 &rs->sr_err );
 574
 575                         if ( rebinding ) {
 576                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 577                         }
 578
 579                         snprintf( buf, sizeof( buf ),
 580                                 "err=%d (%s) nretries=%d",
 581                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 582                         Debug( LDAP_DEBUG_ANY,
 583                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 584                                 op->o_log_prefix, candidate, buf );
 585
 586                         rc = slap_map_api2result( rs );
 587                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 588                                 if ( dolock ) {
 589                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 590                                 }
 591
 592                                 if ( mc->mc_refcnt == 1 ) {
 593                                         meta_clear_one_candidate( msc );
 594                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 595
 596                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 597
 598                                         /* mc here must be the regular mc,
 599                                          * reset and ready for init */
 600                                         rc = meta_back_init_one_conn( op, rs,
 601                                                 mc, candidate,
 602                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 603                                                 LDAP_BACK_DONTSEND );
 604                                         if ( rc == LDAP_SUCCESS ) {
 605                                                 LDAP_BACK_CONN_BINDING_SET( msc );
 606                                         }
 607
 608                                 } else {
 609                                         /* can't do anything about it */
 610                                         rc = LDAP_UNAVAILABLE;
 611                                 }
 612
 613                                 if ( dolock ) {
 614                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 615                                 }
 616
 617                                 if ( rc == LDAP_SUCCESS ) {
 618                                         ldap_pvt_thread_yield();
 619                                         if ( nretries > 0 ) {
 620                                                 nretries--;
 621                                         }
 622                                         goto rebind;
 623                                 }
 624                         }
 625                         break;
 626
 627                 default:
 628                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 629                                         NULL, NULL, NULL, NULL, 1 );
 630                         if ( rc == LDAP_SUCCESS ) {
 631                                 rc = slap_map_api2result( rs );
 632                         }
 633                         break;
 634                 }
 635
 636         } else {
 637                 rs->sr_err = rc;
 638                 rc = slap_map_api2result( rs );
 639         }
 640
 641 done:;
 642         rs->sr_err = rc;
 643         if ( rc != LDAP_SUCCESS ) {
 644                 if ( dolock ) {
 645                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 646                 }
 647                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 648                 if ( META_BACK_ONERR_STOP( mi ) ) {
 649                         LDAP_BACK_CONN_TAINTED_SET( mc );
 650                         meta_back_release_conn_lock( op, mc, dolock );
 651                         *mcp = NULL;
 652                 }
 653                 if ( dolock ) {
 654                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 655                 }
 656
 657                 if ( META_BACK_ONERR_STOP( mi ) && ( sendok & LDAP_BACK_SENDERR ) ) {
 658                         send_ldap_result( op, rs );
 659                 }
 660         }
 661
 662         if ( META_BACK_QUARANTINE( mi ) ) {
 663                 meta_back_quarantine( op, rs, candidate, dolock );
 664         }
 665
 666         return rc;
 667 }
 668
 669 /*
 670  * meta_back_dobind
 671  */
 672 int
 673 meta_back_dobind(
 674         Operation               *op,
 675         SlapReply               *rs,
 676         metaconn_t              *mc,
 677         ldap_back_send_t        sendok )
 678 {
 679         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 680
 681         int                     bound = 0,
 682                                 i,
 683                                 isroot = 0;
 684
 685         SlapReply               *candidates = meta_back_candidates_get( op );
 686
 687         if ( be_isroot( op ) ) {
 688                 isroot = 1;
 689         }
 690
 691         Debug( LDAP_DEBUG_TRACE,
 692                 "%s meta_back_dobind: conn=%ld%s\n",
 693                 op->o_log_prefix,
 694                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 695                 isroot ? " (isroot)" : "" );
 696
 697         /*
 698          * all the targets are bound as pseudoroot
 699          */
 700         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 701                 bound = 1;
 702                 goto done;
 703         }
 704
 705         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 706                 metatarget_t            *mt = mi->mi_targets[ i ];
 707                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 708                 int                     rc, do_retry = 1;
 709
 710                 /*
 711                  * Not a candidate
 712                  */
 713                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 714                         continue;
 715                 }
 716
 717                 assert( msc->msc_ld != NULL );
 718
 719                 /*
 720                  * If the target is already bound it is skipped
 721                  */
 722
 723 retry_binding:;
 724                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 725                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 726                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 727                         ++bound;
 728                         continue;
 729
 730                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 731                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 732                         ldap_pvt_thread_yield();
 733                         goto retry_binding;
 734
 735                 }
 736
 737                 LDAP_BACK_CONN_BINDING_SET( msc );
 738                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 739
 740 retry:;
 741                 rc = meta_back_single_dobind( op, rs, &mc, i,
 742                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 743                 /*
 744                  * NOTE: meta_back_single_dobind() already retries;
 745                  * in case of failure, it resets mc...
 746                  */
 747                 if ( rc != LDAP_SUCCESS ) {
 748                         char            buf[ SLAP_TEXT_BUFLEN ];
 749
 750                         if ( mc == NULL ) {
 751                                 /* meta_back_single_dobind() already sent
 752                                  * response and released connection */
 753                                 goto send_err;
 754                         }
 755
 756
 757                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 758                                 do_retry = 0;
 759                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 760                                         goto retry;
 761                                 }
 762
 763                                 if ( mc != NULL ) {
 764                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 765                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 766                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 767                                 }
 768
 769                                 return 0;
 770                         }
 771
 772                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 773                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 774                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 775
 776                         snprintf( buf, sizeof( buf ),
 777                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 778                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 779                                 rc, ldap_err2string( rc ) );
 780                         Debug( LDAP_DEBUG_ANY,
 781                                 "%s %s\n",
 782                                 op->o_log_prefix, buf, 0 );
 783
 784                         /*
 785                          * null cred bind should always succeed
 786                          * as anonymous, so a failure means
 787                          * the target is no longer candidate possibly
 788                          * due to technical reasons (remote host down?)
 789                          * so better clear the handle
 790                          */
 791                         /* leave the target candidate, but record the error for later use */
 792                         candidates[ i ].sr_err = rc;
 793                         if ( META_BACK_ONERR_STOP( mi ) ) {
 794                                 bound = 0;
 795                                 goto done;
 796                         }
 797
 798                         continue;
 799                 } /* else */
 800
 801                 Debug( LDAP_DEBUG_TRACE,
 802                         "%s meta_back_dobind[%d]: "
 803                         "(%s)\n",
 804                         op->o_log_prefix, i,
 805                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 806
 807                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 808                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 809                 if ( isroot ) {
 810                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 811                 } else {
 812                         LDAP_BACK_CONN_ISANON_SET( msc );
 813                 }
 814                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 815                 ++bound;
 816         }
 817
 818 done:;
 819         Debug( LDAP_DEBUG_TRACE,
 820                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 821                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 822
 823         if ( bound == 0 ) {
 824                 meta_back_release_conn( op, mc );
 825
 826 send_err:;
 827                 if ( sendok & LDAP_BACK_SENDERR ) {
 828                         if ( rs->sr_err == LDAP_SUCCESS ) {
 829                                 rs->sr_err = LDAP_BUSY;
 830                         }
 831                         send_ldap_result( op, rs );
 832                 }
 833
 834                 return 0;
 835         }
 836
 837         return ( bound > 0 );
 838 }
 839
 840 /*
 841  * meta_back_default_rebind
 842  *
 843  * This is a callback used for chasing referrals using the same
 844  * credentials as the original user on this session.
 845  */
 846 int
 847 meta_back_default_rebind(
 848         LDAP                    *ld,
 849         LDAP_CONST char         *url,
 850         ber_tag_t               request,
 851         ber_int_t               msgid,
 852         void                    *params )
 853 {
 854         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 855
 856         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 857                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 858                         NULL, NULL, NULL );
 859 }
 860
 861 /*
 862  * meta_back_default_urllist
 863  *
 864  * This is a callback used for mucking with the urllist
 865  */
 866 int
 867 meta_back_default_urllist(
 868         LDAP            *ld,
 869         LDAPURLDesc     **urllist,
 870         LDAPURLDesc     **url,
 871         void            *params )
 872 {
 873         metatarget_t    *mt = (metatarget_t *)params;
 874         LDAPURLDesc     **urltail;
 875
 876         if ( urllist == url ) {
 877                 return LDAP_SUCCESS;
 878         }
 879
 880         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 881                 /* count */ ;
 882
 883         *urltail = *urllist;
 884         *urllist = *url;
 885         *url = NULL;
 886
 887         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 888         if ( mt->mt_uri ) {
 889                 ch_free( mt->mt_uri );
 890         }
 891
 892         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 893         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 894
 895         return LDAP_SUCCESS;
 896 }
 897
 898 int
 899 meta_back_cancel(
 900         metaconn_t              *mc,
 901         Operation               *op,
 902         SlapReply               *rs,
 903         ber_int_t               msgid,
 904         int                     candidate,
 905         ldap_back_send_t        sendok )
 906 {
 907         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 908
 909         metatarget_t            *mt = mi->mi_targets[ candidate ];
 910         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 911
 912         /* default behavior */
 913         if ( META_BACK_TGT_ABANDON( mt ) ) {
 914                 return ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 915         }
 916
 917         if ( META_BACK_TGT_IGNORE( mt ) ) {
 918                 return LDAP_SUCCESS;
 919         }
 920
 921         if ( META_BACK_TGT_CANCEL( mt ) ) {
 922                 /* FIXME: asynchronous? */
 923                 return ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 924         }
 925
 926         assert( 0 );
 927
 928         return LDAP_OTHER;
 929 }
 930
 931
 932
 933 /*
 934  * FIXME: error return must be handled in a cleaner way ...
 935  */
 936 int
 937 meta_back_op_result(
 938         metaconn_t      *mc,
 939         Operation       *op,
 940         SlapReply       *rs,
 941         int             candidate )
 942 {
 943         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 944
 945         int                     i,
 946                                 rerr = LDAP_SUCCESS;
 947         char                    *rmsg = NULL,
 948                                 *rmatch = NULL;
 949         const char              *save_rmsg = NULL,
 950                                 *save_rmatch = NULL;
 951         void                    *rmatch_ctx = NULL;
 952
 953         assert( mc != NULL );
 954
 955         if ( candidate != META_TARGET_NONE ) {
 956                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 957
 958                 rs->sr_err = LDAP_SUCCESS;
 959
 960                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 961                 if ( rs->sr_err != LDAP_SUCCESS ) {
 962                         /*
 963                          * better check the type of error. In some cases
 964                          * (search ?) it might be better to return a
 965                          * success if at least one of the targets gave
 966                          * positive result ...
 967                          */
 968                         ldap_get_option( msc->msc_ld,
 969                                         LDAP_OPT_ERROR_STRING, &rmsg );
 970                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 971                                 ldap_memfree( rmsg );
 972                                 rmsg = NULL;
 973                         }
 974
 975                         ldap_get_option( msc->msc_ld,
 976                                         LDAP_OPT_MATCHED_DN, &rmatch );
 977                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 978                                 ldap_memfree( rmatch );
 979                                 rmatch = NULL;
 980                         }
 981
 982                         rerr = rs->sr_err = slap_map_api2result( rs );
 983
 984                         Debug(LDAP_DEBUG_ANY,
 985                                         "==> meta_back_op_result: target"
 986                                         " <%d> sending msg \"%s\""
 987                                         " (matched \"%s\")\n",
 988                                         candidate, ( rmsg ? rmsg : "" ),
 989                                         ( rmatch ? rmatch : "" ) );
 990                 }
 991
 992                 if ( META_BACK_QUARANTINE( mi ) ) {
 993                         meta_back_quarantine( op, rs, candidate, 1 );
 994                 }
 995
 996         } else {
 997                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 998                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 999                         char                    *msg = NULL;
1000                         char                    *match = NULL;
1001
1002                         rs->sr_err = LDAP_SUCCESS;
1003
1004                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
1005                         if ( rs->sr_err != LDAP_SUCCESS ) {
1006                                 /*
1007                                  * better check the type of error. In some cases
1008                                  * (search ?) it might be better to return a
1009                                  * success if at least one of the targets gave
1010                                  * positive result ...
1011                                  */
1012                                 ldap_get_option( msc->msc_ld,
1013                                                 LDAP_OPT_ERROR_STRING, &msg );
1014                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
1015                                         ldap_memfree( msg );
1016                                         msg = NULL;
1017                                 }
1018
1019                                 ldap_get_option( msc->msc_ld,
1020                                                 LDAP_OPT_MATCHED_DN, &match );
1021                                 if ( match != NULL && match[ 0 ] == '\0' ) {
1022                                         ldap_memfree( match );
1023                                         match = NULL;
1024                                 }
1025
1026                                 rs->sr_err = slap_map_api2result( rs );
1027
1028                                 Debug(LDAP_DEBUG_ANY,
1029                                                 "==> meta_back_op_result: target"
1030                                                 " <%d> sending msg \"%s\""
1031                                                 " (matched \"%s\")\n",
1032                                                 i, ( msg ? msg : "" ),
1033                                                 ( match ? match : "" ) );
1034
1035                                 /*
1036                                  * FIXME: need to rewrite "match" (need rwinfo)
1037                                  */
1038                                 switch ( rs->sr_err ) {
1039                                 default:
1040                                         rerr = rs->sr_err;
1041                                         if ( msg != NULL ) {
1042                                                 if ( rmsg ) {
1043                                                         ldap_memfree( rmsg );
1044                                                 }
1045                                                 rmsg = msg;
1046                                                 msg = NULL;
1047                                         }
1048                                         if ( match != NULL ) {
1049                                                 if ( rmatch ) {
1050                                                         ldap_memfree( rmatch );
1051                                                 }
1052                                                 rmatch = match;
1053                                                 match = NULL;
1054                                         }
1055                                         break;
1056                                 }
1057
1058                                 if ( msg ) {
1059                                         ldap_memfree( msg );
1060                                 }
1061
1062                                 if ( match ) {
1063                                         ldap_memfree( match );
1064                                 }
1065                         }
1066
1067                         if ( META_BACK_QUARANTINE( mi ) ) {
1068                                 meta_back_quarantine( op, rs, i, 1 );
1069                         }
1070                 }
1071         }
1072
1073         rs->sr_err = rerr;
1074         if ( rmsg != NULL ) {
1075                 save_rmsg = rs->sr_text;
1076                 rs->sr_text = rmsg;
1077         }
1078         if ( rmatch != NULL ) {
1079                 struct berval   dn, pdn;
1080
1081                 ber_str2bv( rmatch, 0, 0, &dn );
1082                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1083                         ldap_memfree( rmatch );
1084                         rmatch_ctx = op->o_tmpmemctx;
1085                         rmatch = pdn.bv_val;
1086                 }
1087                 save_rmatch = rs->sr_matched;
1088                 rs->sr_matched = rmatch;
1089         }
1090         send_ldap_result( op, rs );
1091         if ( rmsg != NULL ) {
1092                 ber_memfree( rmsg );
1093                 rs->sr_text = save_rmsg;
1094         }
1095         if ( rmatch != NULL ) {
1096                 ber_memfree_x( rmatch, rmatch_ctx );
1097                 rs->sr_matched = save_rmatch;
1098         }
1099
1100         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
1101 }
1102