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 1999-2011 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 #include "lutil_ldap.h"
  38
  39 static int
  40 meta_back_proxy_authz_bind(
  41         metaconn_t              *mc,
  42         int                     candidate,
  43         Operation               *op,
  44         SlapReply               *rs,
  45         ldap_back_send_t        sendok );
  46
  47 static int
  48 meta_back_single_bind(
  49         Operation               *op,
  50         SlapReply               *rs,
  51         metaconn_t              *mc,
  52         int                     candidate );
  53
  54 int
  55 meta_back_bind( Operation *op, SlapReply *rs )
  56 {
  57         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  58         metaconn_t      *mc = NULL;
  59
  60         int             rc = LDAP_OTHER,
  61                         i,
  62                         gotit = 0,
  63                         isroot = 0;
  64
  65         SlapReply       *candidates;
  66
  67         rs->sr_err = LDAP_SUCCESS;
  68
  69         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  70                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  71
  72         /* the test on the bind method should be superfluous */
  73         switch ( be_rootdn_bind( op, rs ) ) {
  74         case LDAP_SUCCESS:
  75                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  76                         /* frontend will return success */
  77                         return rs->sr_err;
  78                 }
  79
  80                 isroot = 1;
  81                 /* fallthru */
  82
  83         case SLAP_CB_CONTINUE:
  84                 break;
  85
  86         default:
  87                 /* be_rootdn_bind() sent result */
  88                 return rs->sr_err;
  89         }
  90
  91         /* we need meta_back_getconn() not send result even on error,
  92          * because we want to intercept the error and make it
  93          * invalidCredentials */
  94         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  95         if ( !mc ) {
  96                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
  97                         char    buf[ SLAP_TEXT_BUFLEN ];
  98
  99                         snprintf( buf, sizeof( buf ),
 100                                 "meta_back_bind: no target "
 101                                 "for dn \"%s\" (%d%s%s).",
 102                                 op->o_req_dn.bv_val, rs->sr_err,
 103                                 rs->sr_text ? ". " : "",
 104                                 rs->sr_text ? rs->sr_text : "" );
 105                         Debug( LDAP_DEBUG_ANY,
 106                                 "%s %s\n",
 107                                 op->o_log_prefix, buf, 0 );
 108                 }
 109
 110                 /* FIXME: there might be cases where we don't want
 111                  * to map the error onto invalidCredentials */
 112                 switch ( rs->sr_err ) {
 113                 case LDAP_NO_SUCH_OBJECT:
 114                 case LDAP_UNWILLING_TO_PERFORM:
 115                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 116                         rs->sr_text = NULL;
 117                         break;
 118                 }
 119                 send_ldap_result( op, rs );
 120                 return rs->sr_err;
 121         }
 122
 123         candidates = meta_back_candidates_get( op );
 124
 125         /*
 126          * Each target is scanned ...
 127          */
 128         mc->mc_authz_target = META_BOUND_NONE;
 129         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 130                 metatarget_t    *mt = mi->mi_targets[ i ];
 131                 int             lerr;
 132
 133                 /*
 134                  * Skip non-candidates
 135                  */
 136                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 137                         continue;
 138                 }
 139
 140                 if ( gotit == 0 ) {
 141                         /* set rc to LDAP_SUCCESS only if at least
 142                          * one candidate has been tried */
 143                         rc = LDAP_SUCCESS;
 144                         gotit = 1;
 145
 146                 } else if ( !isroot ) {
 147                         /*
 148                          * A bind operation is expected to have
 149                          * ONE CANDIDATE ONLY!
 150                          */
 151                         Debug( LDAP_DEBUG_ANY,
 152                                 "### %s meta_back_bind: more than one"
 153                                 " candidate selected...\n",
 154                                 op->o_log_prefix, 0, 0 );
 155                 }
 156
 157                 if ( isroot ) {
 158                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 159                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 160                         {
 161                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 162
 163                                 /* skip the target if no pseudorootdn is provided */
 164                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 165                                         ch_free( msc->msc_bound_ndn.bv_val );
 166                                         BER_BVZERO( &msc->msc_bound_ndn );
 167                                 }
 168
 169                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 170                                         /* destroy sensitive data */
 171                                         memset( msc->msc_cred.bv_val, 0,
 172                                                 msc->msc_cred.bv_len );
 173                                         ch_free( msc->msc_cred.bv_val );
 174                                         BER_BVZERO( &msc->msc_cred );
 175                                 }
 176
 177                                 continue;
 178                         }
 179
 180
 181                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
 182                         lerr = rs->sr_err;
 183
 184                 } else {
 185                         lerr = meta_back_single_bind( op, rs, mc, i );
 186                 }
 187
 188                 if ( lerr != LDAP_SUCCESS ) {
 189                         rc = rs->sr_err = lerr;
 190
 191                         /* FIXME: in some cases (e.g. unavailable)
 192                          * do not assume it's not candidate; rather
 193                          * mark this as an error to be eventually
 194                          * reported to client */
 195                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 196                         break;
 197                 }
 198         }
 199
 200         /* must re-insert if local DN changed as result of bind */
 201         if ( rc == LDAP_SUCCESS ) {
 202                 if ( isroot ) {
 203                         mc->mc_authz_target = META_BOUND_ALL;
 204                 }
 205
 206                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 207                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 208                 {
 209                         int             lerr;
 210
 211                         /* wait for all other ops to release the connection */
 212                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 213                         assert( mc->mc_refcnt == 1 );
 214 #if META_BACK_PRINT_CONNTREE > 0
 215                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 216 #endif /* META_BACK_PRINT_CONNTREE */
 217
 218                         /* delete all cached connections with the current connection */
 219                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 220                                 metaconn_t      *tmpmc;
 221
 222                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 223                                 {
 224                                         assert( !LDAP_BACK_PCONN_ISPRIV( mc ) );
 225                                         Debug( LDAP_DEBUG_TRACE,
 226                                                 "=>meta_back_bind: destroying conn %lu (refcnt=%u)\n",
 227                                                 mc->mc_conn->c_connid, mc->mc_refcnt, 0 );
 228
 229                                         if ( tmpmc->mc_refcnt != 0 ) {
 230                                                 /* taint it */
 231                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 232
 233                                         } else {
 234                                                 /*
 235                                                  * Needs a test because the handler may be corrupted,
 236                                                  * and calling ldap_unbind on a corrupted header results
 237                                                  * in a segmentation fault
 238                                                  */
 239                                                 meta_back_conn_free( tmpmc );
 240                                         }
 241                                 }
 242                         }
 243
 244                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 245                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 246                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 247 #if META_BACK_PRINT_CONNTREE > 0
 248                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 249 #endif /* META_BACK_PRINT_CONNTREE */
 250                         if ( lerr == 0 ) {
 251 #if 0
 252                                 /* NOTE: a connection cannot be privileged
 253                                  * and be in the avl tree at the same time
 254                                  */
 255                                 if ( isroot ) {
 256                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 257                                         LDAP_BACK_PCONN_SET( mc, op );
 258                                 }
 259 #endif
 260                                 LDAP_BACK_CONN_CACHED_SET( mc );
 261
 262                         } else {
 263                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 264                         }
 265                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 266                 }
 267         }
 268
 269         if ( mc != NULL ) {
 270                 meta_back_release_conn( mi, mc );
 271         }
 272
 273         /*
 274          * rc is LDAP_SUCCESS if at least one bind succeeded,
 275          * err is the last error that occurred during a bind;
 276          * if at least (and at most?) one bind succeeds, fine.
 277          */
 278         if ( rc != LDAP_SUCCESS ) {
 279
 280                 /*
 281                  * deal with bind failure ...
 282                  */
 283
 284                 /*
 285                  * no target was found within the naming context,
 286                  * so bind must fail with invalid credentials
 287                  */
 288                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 289                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 290                 } else {
 291                         rs->sr_err = slap_map_api2result( rs );
 292                 }
 293                 send_ldap_result( op, rs );
 294                 return rs->sr_err;
 295
 296         }
 297
 298         return LDAP_SUCCESS;
 299 }
 300
 301 static int
 302 meta_back_bind_op_result(
 303         Operation               *op,
 304         SlapReply               *rs,
 305         metaconn_t              *mc,
 306         int                     candidate,
 307         int                     msgid,
 308         ldap_back_send_t        sendok )
 309 {
 310         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 311         metatarget_t            *mt = mi->mi_targets[ candidate ];
 312         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 313         LDAPMessage             *res;
 314         struct timeval          tv;
 315         int                     rc;
 316         int                     nretries = mt->mt_nretries;
 317         char                    buf[ SLAP_TEXT_BUFLEN ];
 318
 319         Debug( LDAP_DEBUG_TRACE,
 320                 ">>> %s meta_back_bind_op_result[%d]\n",
 321                 op->o_log_prefix, candidate, 0 );
 322
 323         /* make sure this is clean */
 324         assert( rs->sr_ctrls == NULL );
 325
 326         if ( rs->sr_err == LDAP_SUCCESS ) {
 327                 time_t          stoptime = (time_t)(-1),
 328                                 timeout;
 329                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 330                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 331                 const char      *timeout_text = "Operation timed out";
 332                 slap_op_t       opidx = slap_req2op( op->o_tag );
 333
 334                 /* since timeout is not specified, compute and use
 335                  * the one specific to the ongoing operation */
 336                 if ( opidx == LDAP_REQ_SEARCH ) {
 337                         if ( op->ors_tlimit <= 0 ) {
 338                                 timeout = 0;
 339
 340                         } else {
 341                                 timeout = op->ors_tlimit;
 342                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 343                                 timeout_text = NULL;
 344                         }
 345
 346                 } else {
 347                         timeout = mt->mt_timeout[ opidx ];
 348                 }
 349
 350                 /* better than nothing :) */
 351                 if ( timeout == 0 ) {
 352                         if ( mi->mi_idle_timeout ) {
 353                                 timeout = mi->mi_idle_timeout;
 354
 355                         } else if ( mi->mi_conn_ttl ) {
 356                                 timeout = mi->mi_conn_ttl;
 357                         }
 358                 }
 359
 360                 if ( timeout ) {
 361                         stoptime = op->o_time + timeout;
 362                 }
 363
 364                 LDAP_BACK_TV_SET( &tv );
 365
 366                 /*
 367                  * handle response!!!
 368                  */
 369 retry:;
 370                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 371                 switch ( rc ) {
 372                 case 0:
 373                         if ( nretries != META_RETRY_NEVER
 374                                 || ( timeout && slap_get_time() <= stoptime ) )
 375                         {
 376                                 ldap_pvt_thread_yield();
 377                                 if ( nretries > 0 ) {
 378                                         nretries--;
 379                                 }
 380                                 tv = mt->mt_bind_timeout;
 381                                 goto retry;
 382                         }
 383
 384                         /* don't let anyone else use this handler,
 385                          * because there's a pending bind that will not
 386                          * be acknowledged */
 387                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 388                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 389
 390 #ifdef DEBUG_205
 391                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 392                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 393 #endif /* DEBUG_205 */
 394
 395                         meta_clear_one_candidate( op, mc, candidate );
 396                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 397
 398                         rs->sr_err = timeout_err;
 399                         rs->sr_text = timeout_text;
 400                         break;
 401
 402                 case -1:
 403                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 404                                 &rs->sr_err );
 405
 406                         snprintf( buf, sizeof( buf ),
 407                                 "err=%d (%s) nretries=%d",
 408                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 409                         Debug( LDAP_DEBUG_ANY,
 410                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 411                                 op->o_log_prefix, candidate, buf );
 412                         break;
 413
 414                 default:
 415                         /* only touch when activity actually took place... */
 416                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 417                                 msc->msc_time = op->o_time;
 418                         }
 419
 420                         /* FIXME: matched? referrals? response controls? */
 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                         rs->sr_err = slap_map_api2result( rs );
 427                         break;
 428                 }
 429         }
 430
 431         rs->sr_err = slap_map_api2result( rs );
 432
 433         Debug( LDAP_DEBUG_TRACE,
 434                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 435                 op->o_log_prefix, candidate, rs->sr_err );
 436
 437         return rs->sr_err;
 438 }
 439
 440 /*
 441  * meta_back_single_bind
 442  *
 443  * attempts to perform a bind with creds
 444  */
 445 static int
 446 meta_back_single_bind(
 447         Operation               *op,
 448         SlapReply               *rs,
 449         metaconn_t              *mc,
 450         int                     candidate )
 451 {
 452         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 453         metatarget_t            *mt = mi->mi_targets[ candidate ];
 454         struct berval           mdn = BER_BVNULL;
 455         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 456         int                     msgid;
 457         dncookie                dc;
 458         struct berval           save_o_dn;
 459         int                     save_o_do_not_cache;
 460         LDAPControl             **ctrls = NULL;
 461
 462         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 463                 ch_free( msc->msc_bound_ndn.bv_val );
 464                 BER_BVZERO( &msc->msc_bound_ndn );
 465         }
 466
 467         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 468                 /* destroy sensitive data */
 469                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 470                 ch_free( msc->msc_cred.bv_val );
 471                 BER_BVZERO( &msc->msc_cred );
 472         }
 473
 474         /*
 475          * Rewrite the bind dn if needed
 476          */
 477         dc.target = mt;
 478         dc.conn = op->o_conn;
 479         dc.rs = rs;
 480         dc.ctx = "bindDN";
 481
 482         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 483                 rs->sr_text = "DN rewrite error";
 484                 rs->sr_err = LDAP_OTHER;
 485                 return rs->sr_err;
 486         }
 487
 488         /* don't add proxyAuthz; set the bindDN */
 489         save_o_dn = op->o_dn;
 490         save_o_do_not_cache = op->o_do_not_cache;
 491         op->o_do_not_cache = 1;
 492         op->o_dn = op->o_req_dn;
 493
 494         ctrls = op->o_ctrls;
 495         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 496         op->o_dn = save_o_dn;
 497         op->o_do_not_cache = save_o_do_not_cache;
 498         if ( rs->sr_err != LDAP_SUCCESS ) {
 499                 goto return_results;
 500         }
 501
 502         /* FIXME: this fixes the bind problem right now; we need
 503          * to use the asynchronous version to get the "matched"
 504          * and more in case of failure ... */
 505         /* FIXME: should we check if at least some of the op->o_ctrls
 506          * can/should be passed? */
 507         for (;;) {
 508                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 509                         LDAP_SASL_SIMPLE, &op->orb_cred,
 510                         ctrls, NULL, &msgid );
 511                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 512                         break;
 513                 }
 514                 ldap_pvt_thread_yield();
 515         }
 516
 517         mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 518
 519         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 520         if ( rs->sr_err != LDAP_SUCCESS ) {
 521                 goto return_results;
 522         }
 523
 524         /* If defined, proxyAuthz will be used also when
 525          * back-ldap is the authorizing backend; for this
 526          * purpose, a successful bind is followed by a
 527          * bind with the configured identity assertion */
 528         /* NOTE: use with care */
 529         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 530                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 531                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 532                         goto return_results;
 533                 }
 534                 goto cache_refresh;
 535         }
 536
 537         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 538         LDAP_BACK_CONN_ISBOUND_SET( msc );
 539         mc->mc_authz_target = candidate;
 540
 541         if ( META_BACK_TGT_SAVECRED( mt ) ) {
 542                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 543                         memset( msc->msc_cred.bv_val, 0,
 544                                 msc->msc_cred.bv_len );
 545                 }
 546                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 547                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 548         }
 549
 550 cache_refresh:;
 551         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 552                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 553         {
 554                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 555                                 &op->o_req_ndn, candidate );
 556         }
 557
 558 return_results:;
 559         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 560                 free( mdn.bv_val );
 561         }
 562
 563         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 564                 meta_back_quarantine( op, rs, candidate );
 565         }
 566
 567         return rs->sr_err;
 568 }
 569
 570 /*
 571  * meta_back_single_dobind
 572  */
 573 int
 574 meta_back_single_dobind(
 575         Operation               *op,
 576         SlapReply               *rs,
 577         metaconn_t              **mcp,
 578         int                     candidate,
 579         ldap_back_send_t        sendok,
 580         int                     nretries,
 581         int                     dolock )
 582 {
 583         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 584         metatarget_t            *mt = mi->mi_targets[ candidate ];
 585         metaconn_t              *mc = *mcp;
 586         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 587         int                     msgid;
 588
 589         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 590
 591         /* NOTE: this obsoletes pseudorootdn */
 592         if ( op->o_conn != NULL &&
 593                 !op->o_do_not_cache &&
 594                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 595                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 596                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 597                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 598         {
 599                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 600
 601         } else {
 602                 char *binddn = "";
 603                 struct berval cred = BER_BVC( "" );
 604
 605                 /* use credentials if available */
 606                 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
 607                         && !BER_BVISNULL( &msc->msc_cred ) )
 608                 {
 609                         binddn = msc->msc_bound_ndn.bv_val;
 610                         cred = msc->msc_cred;
 611                 }
 612
 613                 /* FIXME: should we check if at least some of the op->o_ctrls
 614                  * can/should be passed? */
 615                 for (;;) {
 616                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 617                                 binddn, LDAP_SASL_SIMPLE, &cred,
 618                                 NULL, NULL, &msgid );
 619                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 620                                 break;
 621                         }
 622                         ldap_pvt_thread_yield();
 623                 }
 624
 625                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 626
 627                 /* if bind succeeded, but anonymous, clear msc_bound_ndn */
 628                 if ( rs->sr_err != LDAP_SUCCESS || binddn[0] == '\0' ) {
 629                         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 630                                 ber_memfree( msc->msc_bound_ndn.bv_val );
 631                                 BER_BVZERO( &msc->msc_bound_ndn );
 632                         }
 633
 634                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 635                                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 636                                 ber_memfree( msc->msc_cred.bv_val );
 637                                 BER_BVZERO( &msc->msc_cred );
 638                         }
 639                 }
 640         }
 641
 642         if ( rs->sr_err != LDAP_SUCCESS ) {
 643                 if ( dolock ) {
 644                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 645                 }
 646                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 647                 if ( META_BACK_ONERR_STOP( mi ) ) {
 648                         LDAP_BACK_CONN_TAINTED_SET( mc );
 649                         meta_back_release_conn_lock( mi, mc, 0 );
 650                         *mcp = NULL;
 651                 }
 652                 if ( dolock ) {
 653                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 654                 }
 655         }
 656
 657         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 658                 meta_back_quarantine( op, rs, candidate );
 659         }
 660
 661         return rs->sr_err;
 662 }
 663
 664 /*
 665  * meta_back_dobind
 666  */
 667 int
 668 meta_back_dobind(
 669         Operation               *op,
 670         SlapReply               *rs,
 671         metaconn_t              *mc,
 672         ldap_back_send_t        sendok )
 673 {
 674         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 675
 676         int                     bound = 0,
 677                                 i,
 678                                 isroot = 0;
 679
 680         SlapReply               *candidates;
 681
 682         if ( be_isroot( op ) ) {
 683                 isroot = 1;
 684         }
 685
 686         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 687                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 688                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 689
 690                 Debug( LDAP_DEBUG_TRACE,
 691                         "%s meta_back_dobind: conn=%s%s\n",
 692                         op->o_log_prefix, buf,
 693                         isroot ? " (isroot)" : "" );
 694         }
 695
 696         /*
 697          * all the targets are bound as pseudoroot
 698          */
 699         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 700                 bound = 1;
 701                 goto done;
 702         }
 703
 704         candidates = meta_back_candidates_get( op );
 705
 706         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 707                 metatarget_t            *mt = mi->mi_targets[ i ];
 708                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 709                 int                     rc;
 710
 711                 /*
 712                  * Not a candidate
 713                  */
 714                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 715                         continue;
 716                 }
 717
 718                 assert( msc->msc_ld != NULL );
 719
 720                 /*
 721                  * If the target is already bound it is skipped
 722                  */
 723
 724 retry_binding:;
 725                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 726                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 727                         || ( LDAP_BACK_CONN_ISANON( msc )
 728                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 729                 {
 730                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 731                         ++bound;
 732                         continue;
 733
 734                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 735                 {
 736                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 737                         ldap_pvt_thread_yield();
 738                         goto retry_binding;
 739
 740                 }
 741
 742                 LDAP_BACK_CONN_BINDING_SET( msc );
 743                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 744
 745                 rc = meta_back_single_dobind( op, rs, &mc, i,
 746                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 747                 /*
 748                  * NOTE: meta_back_single_dobind() already retries;
 749                  * in case of failure, it resets mc...
 750                  */
 751                 if ( rc != LDAP_SUCCESS ) {
 752                         char            buf[ SLAP_TEXT_BUFLEN ];
 753
 754                         if ( mc == NULL ) {
 755                                 /* meta_back_single_dobind() already sent
 756                                  * response and released connection */
 757                                 goto send_err;
 758                         }
 759
 760
 761                         if ( rc == LDAP_UNAVAILABLE ) {
 762                                 /* FIXME: meta_back_retry() already re-calls
 763                                  * meta_back_single_dobind() */
 764                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 765                                         goto retry_ok;
 766                                 }
 767
 768                                 if ( mc != NULL ) {
 769                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 770                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 771                                         meta_back_release_conn_lock( mi, mc, 0 );
 772                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 773                                 }
 774
 775                                 return 0;
 776                         }
 777
 778                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 779                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 780                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 781
 782                         snprintf( buf, sizeof( buf ),
 783                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 784                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 785                                 rc, ldap_err2string( rc ) );
 786                         Debug( LDAP_DEBUG_ANY,
 787                                 "%s %s\n",
 788                                 op->o_log_prefix, buf, 0 );
 789
 790                         /*
 791                          * null cred bind should always succeed
 792                          * as anonymous, so a failure means
 793                          * the target is no longer candidate possibly
 794                          * due to technical reasons (remote host down?)
 795                          * so better clear the handle
 796                          */
 797                         /* leave the target candidate, but record the error for later use */
 798                         candidates[ i ].sr_err = rc;
 799                         if ( META_BACK_ONERR_STOP( mi ) ) {
 800                                 bound = 0;
 801                                 goto done;
 802                         }
 803
 804                         continue;
 805                 } /* else */
 806
 807 retry_ok:;
 808                 Debug( LDAP_DEBUG_TRACE,
 809                         "%s meta_back_dobind[%d]: "
 810                         "(%s)\n",
 811                         op->o_log_prefix, i,
 812                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 813
 814                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 815                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 816                 if ( isroot ) {
 817                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 818                 } else {
 819                         LDAP_BACK_CONN_ISANON_SET( msc );
 820                 }
 821                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 822                 ++bound;
 823         }
 824
 825 done:;
 826         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 827                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 828                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 829
 830                 Debug( LDAP_DEBUG_TRACE,
 831                         "%s meta_back_dobind: conn=%s bound=%d\n",
 832                         op->o_log_prefix, buf, bound );
 833         }
 834
 835         if ( bound == 0 ) {
 836                 meta_back_release_conn( mi, mc );
 837
 838 send_err:;
 839                 if ( sendok & LDAP_BACK_SENDERR ) {
 840                         if ( rs->sr_err == LDAP_SUCCESS ) {
 841                                 rs->sr_err = LDAP_BUSY;
 842                         }
 843                         send_ldap_result( op, rs );
 844                 }
 845
 846                 return 0;
 847         }
 848
 849         return ( bound > 0 );
 850 }
 851
 852 /*
 853  * meta_back_default_rebind
 854  *
 855  * This is a callback used for chasing referrals using the same
 856  * credentials as the original user on this session.
 857  */
 858 int
 859 meta_back_default_rebind(
 860         LDAP                    *ld,
 861         LDAP_CONST char         *url,
 862         ber_tag_t               request,
 863         ber_int_t               msgid,
 864         void                    *params )
 865 {
 866         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 867
 868         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 869                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 870                         NULL, NULL, NULL );
 871 }
 872
 873 /*
 874  * meta_back_default_urllist
 875  *
 876  * This is a callback used for mucking with the urllist
 877  */
 878 int
 879 meta_back_default_urllist(
 880         LDAP            *ld,
 881         LDAPURLDesc     **urllist,
 882         LDAPURLDesc     **url,
 883         void            *params )
 884 {
 885         metatarget_t    *mt = (metatarget_t *)params;
 886         LDAPURLDesc     **urltail;
 887
 888         if ( urllist == url ) {
 889                 return LDAP_SUCCESS;
 890         }
 891
 892         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 893                 /* count */ ;
 894
 895         *urltail = *urllist;
 896         *urllist = *url;
 897         *url = NULL;
 898
 899         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 900         if ( mt->mt_uri ) {
 901                 ch_free( mt->mt_uri );
 902         }
 903
 904         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 905         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 906
 907         return LDAP_SUCCESS;
 908 }
 909
 910 int
 911 meta_back_cancel(
 912         metaconn_t              *mc,
 913         Operation               *op,
 914         SlapReply               *rs,
 915         ber_int_t               msgid,
 916         int                     candidate,
 917         ldap_back_send_t        sendok )
 918 {
 919         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 920
 921         metatarget_t            *mt = mi->mi_targets[ candidate ];
 922         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 923
 924         int                     rc = LDAP_OTHER;
 925
 926         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 927                 op->o_log_prefix, candidate, msgid );
 928
 929         /* default behavior */
 930         if ( META_BACK_TGT_ABANDON( mt ) ) {
 931                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 932
 933         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 934                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 935
 936         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 937                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 938
 939         } else {
 940                 assert( 0 );
 941         }
 942
 943         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 944                 op->o_log_prefix, candidate, rc );
 945
 946         return rc;
 947 }
 948
 949
 950
 951 /*
 952  * FIXME: error return must be handled in a cleaner way ...
 953  */
 954 int
 955 meta_back_op_result(
 956         metaconn_t              *mc,
 957         Operation               *op,
 958         SlapReply               *rs,
 959         int                     candidate,
 960         ber_int_t               msgid,
 961         time_t                  timeout,
 962         ldap_back_send_t        sendok )
 963 {
 964         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 965
 966         const char      *save_text = rs->sr_text,
 967                         *save_matched = rs->sr_matched;
 968         BerVarray       save_ref = rs->sr_ref;
 969         LDAPControl     **save_ctrls = rs->sr_ctrls;
 970         void            *matched_ctx = NULL;
 971
 972         char            *matched = NULL;
 973         char            *text = NULL;
 974         char            **refs = NULL;
 975         LDAPControl     **ctrls = NULL;
 976
 977         assert( mc != NULL );
 978
 979         rs->sr_text = NULL;
 980         rs->sr_matched = NULL;
 981         rs->sr_ref = NULL;
 982         rs->sr_ctrls = NULL;
 983
 984         if ( candidate != META_TARGET_NONE ) {
 985                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 986                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 987
 988                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
 989                         int             rc;
 990                         struct timeval  tv;
 991                         LDAPMessage     *res = NULL;
 992                         time_t          stoptime = (time_t)(-1);
 993                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 994                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 995                         const char      *timeout_text = "Operation timed out";
 996
 997                         /* if timeout is not specified, compute and use
 998                          * the one specific to the ongoing operation */
 999                         if ( timeout == (time_t)(-1) ) {
1000                                 slap_op_t       opidx = slap_req2op( op->o_tag );
1001
1002                                 if ( opidx == SLAP_OP_SEARCH ) {
1003                                         if ( op->ors_tlimit <= 0 ) {
1004                                                 timeout = 0;
1005
1006                                         } else {
1007                                                 timeout = op->ors_tlimit;
1008                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1009                                                 timeout_text = NULL;
1010                                         }
1011
1012                                 } else {
1013                                         timeout = mt->mt_timeout[ opidx ];
1014                                 }
1015                         }
1016
1017                         /* better than nothing :) */
1018                         if ( timeout == 0 ) {
1019                                 if ( mi->mi_idle_timeout ) {
1020                                         timeout = mi->mi_idle_timeout;
1021
1022                                 } else if ( mi->mi_conn_ttl ) {
1023                                         timeout = mi->mi_conn_ttl;
1024                                 }
1025                         }
1026
1027                         if ( timeout ) {
1028                                 stoptime = op->o_time + timeout;
1029                         }
1030
1031                         LDAP_BACK_TV_SET( &tv );
1032
1033 retry:;
1034                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1035                         switch ( rc ) {
1036                         case 0:
1037                                 if ( timeout && slap_get_time() > stoptime ) {
1038                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1039                                         rs->sr_err = timeout_err;
1040                                         rs->sr_text = timeout_text;
1041                                         break;
1042                                 }
1043
1044                                 LDAP_BACK_TV_SET( &tv );
1045                                 ldap_pvt_thread_yield();
1046                                 goto retry;
1047
1048                         case -1:
1049                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1050                                                 &rs->sr_err );
1051                                 break;
1052
1053
1054                         /* otherwise get the result; if it is not
1055                          * LDAP_SUCCESS, record it in the reply
1056                          * structure (this includes
1057                          * LDAP_COMPARE_{TRUE|FALSE}) */
1058                         default:
1059                                 /* only touch when activity actually took place... */
1060                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1061                                         msc->msc_time = op->o_time;
1062                                 }
1063
1064                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1065                                                 &matched, &text, &refs, &ctrls, 1 );
1066                                 res = NULL;
1067                                 if ( rc == LDAP_SUCCESS ) {
1068                                         rs->sr_text = text;
1069                                 } else {
1070                                         rs->sr_err = rc;
1071                                 }
1072                                 rs->sr_err = slap_map_api2result( rs );
1073
1074                                 /* RFC 4511: referrals can only appear
1075                                  * if result code is LDAP_REFERRAL */
1076                                 if ( refs != NULL
1077                                         && refs[ 0 ] != NULL
1078                                         && refs[ 0 ][ 0 ] != '\0' )
1079                                 {
1080                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1081                                                 Debug( LDAP_DEBUG_ANY,
1082                                                         "%s meta_back_op_result[%d]: "
1083                                                         "got referrals with err=%d\n",
1084                                                         op->o_log_prefix,
1085                                                         candidate, rs->sr_err );
1086
1087                                         } else {
1088                                                 int     i;
1089
1090                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1091                                                         /* count */ ;
1092                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1093                                                         op->o_tmpmemctx );
1094                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1095                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1096                                                 }
1097                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1098                                         }
1099
1100                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1101                                         Debug( LDAP_DEBUG_ANY,
1102                                                 "%s meta_back_op_result[%d]: "
1103                                                 "got err=%d with null "
1104                                                 "or empty referrals\n",
1105                                                 op->o_log_prefix,
1106                                                 candidate, rs->sr_err );
1107
1108                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1109                                 }
1110
1111                                 if ( ctrls != NULL ) {
1112                                         rs->sr_ctrls = ctrls;
1113                                 }
1114                         }
1115
1116                         assert( res == NULL );
1117                 }
1118
1119                 /* if the error in the reply structure is not
1120                  * LDAP_SUCCESS, try to map it from client
1121                  * to server error */
1122                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1123                         rs->sr_err = slap_map_api2result( rs );
1124
1125                         /* internal ops ( op->o_conn == NULL )
1126                          * must not reply to client */
1127                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1128
1129                                 /* record the (massaged) matched
1130                                  * DN into the reply structure */
1131                                 rs->sr_matched = matched;
1132                         }
1133                 }
1134
1135                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1136                         meta_back_quarantine( op, rs, candidate );
1137                 }
1138
1139         } else {
1140                 int     i,
1141                         err = rs->sr_err;
1142
1143                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1144                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1145                         char                    *xtext = NULL;
1146                         char                    *xmatched = NULL;
1147
1148                         if ( msc->msc_ld == NULL ) {
1149                                 continue;
1150                         }
1151
1152                         rs->sr_err = LDAP_SUCCESS;
1153
1154                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1155                         if ( rs->sr_err != LDAP_SUCCESS ) {
1156                                 /*
1157                                  * better check the type of error. In some cases
1158                                  * (search ?) it might be better to return a
1159                                  * success if at least one of the targets gave
1160                                  * positive result ...
1161                                  */
1162                                 ldap_get_option( msc->msc_ld,
1163                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1164                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1165                                         ldap_memfree( xtext );
1166                                         xtext = NULL;
1167                                 }
1168
1169                                 ldap_get_option( msc->msc_ld,
1170                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1171                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1172                                         ldap_memfree( xmatched );
1173                                         xmatched = NULL;
1174                                 }
1175
1176                                 rs->sr_err = slap_map_api2result( rs );
1177
1178                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1179                                         char    buf[ SLAP_TEXT_BUFLEN ];
1180
1181                                         snprintf( buf, sizeof( buf ),
1182                                                 "meta_back_op_result[%d] "
1183                                                 "err=%d text=\"%s\" matched=\"%s\"",
1184                                                 i, rs->sr_err,
1185                                                 ( xtext ? xtext : "" ),
1186                                                 ( xmatched ? xmatched : "" ) );
1187                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1188                                                 op->o_log_prefix, buf, 0 );
1189                                 }
1190
1191                                 /*
1192                                  * FIXME: need to rewrite "match" (need rwinfo)
1193                                  */
1194                                 switch ( rs->sr_err ) {
1195                                 default:
1196                                         err = rs->sr_err;
1197                                         if ( xtext != NULL ) {
1198                                                 if ( text ) {
1199                                                         ldap_memfree( text );
1200                                                 }
1201                                                 text = xtext;
1202                                                 xtext = NULL;
1203                                         }
1204                                         if ( xmatched != NULL ) {
1205                                                 if ( matched ) {
1206                                                         ldap_memfree( matched );
1207                                                 }
1208                                                 matched = xmatched;
1209                                                 xmatched = NULL;
1210                                         }
1211                                         break;
1212                                 }
1213
1214                                 if ( xtext ) {
1215                                         ldap_memfree( xtext );
1216                                 }
1217
1218                                 if ( xmatched ) {
1219                                         ldap_memfree( xmatched );
1220                                 }
1221                         }
1222
1223                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1224                                 meta_back_quarantine( op, rs, i );
1225                         }
1226                 }
1227
1228                 if ( err != LDAP_SUCCESS ) {
1229                         rs->sr_err = err;
1230                 }
1231         }
1232
1233         if ( matched != NULL ) {
1234                 struct berval   dn, pdn;
1235
1236                 ber_str2bv( matched, 0, 0, &dn );
1237                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1238                         ldap_memfree( matched );
1239                         matched_ctx = op->o_tmpmemctx;
1240                         matched = pdn.bv_val;
1241                 }
1242                 rs->sr_matched = matched;
1243         }
1244
1245         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1246                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1247                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1248                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1249                                 send_ldap_result( op, rs );
1250                         }
1251                 }
1252
1253         } else if ( op->o_conn &&
1254                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1255                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1256         {
1257                 send_ldap_result( op, rs );
1258         }
1259         if ( matched ) {
1260                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1261         }
1262         if ( text ) {
1263                 ldap_memfree( text );
1264         }
1265         if ( rs->sr_ref ) {
1266                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1267                 rs->sr_ref = NULL;
1268         }
1269         if ( refs ) {
1270                 ber_memvfree( (void **)refs );
1271         }
1272         if ( ctrls ) {
1273                 assert( rs->sr_ctrls != NULL );
1274                 ldap_controls_free( ctrls );
1275         }
1276
1277         rs->sr_text = save_text;
1278         rs->sr_matched = save_matched;
1279         rs->sr_ref = save_ref;
1280         rs->sr_ctrls = save_ctrls;
1281
1282         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1283 }
1284
1285 /*
1286  * meta_back_proxy_authz_cred()
1287  *
1288  * prepares credentials & method for meta_back_proxy_authz_bind();
1289  * or, if method is SASL, performs the SASL bind directly.
1290  */
1291 int
1292 meta_back_proxy_authz_cred(
1293         metaconn_t              *mc,
1294         int                     candidate,
1295         Operation               *op,
1296         SlapReply               *rs,
1297         ldap_back_send_t        sendok,
1298         struct berval           *binddn,
1299         struct berval           *bindcred,
1300         int                     *method )
1301 {
1302         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1303         metatarget_t            *mt = mi->mi_targets[ candidate ];
1304         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1305         struct berval           ndn;
1306         int                     dobind = 0;
1307
1308         /* don't proxyAuthz if protocol is not LDAPv3 */
1309         switch ( mt->mt_version ) {
1310         case LDAP_VERSION3:
1311                 break;
1312
1313         case 0:
1314                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1315                         break;
1316                 }
1317                 /* fall thru */
1318
1319         default:
1320                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1321                 if ( sendok & LDAP_BACK_SENDERR ) {
1322                         send_ldap_result( op, rs );
1323                 }
1324                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1325                 goto done;
1326         }
1327
1328         if ( op->o_tag == LDAP_REQ_BIND ) {
1329                 ndn = op->o_req_ndn;
1330
1331         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1332                 ndn = op->o_conn->c_ndn;
1333
1334         } else {
1335                 ndn = op->o_ndn;
1336         }
1337
1338         /*
1339          * FIXME: we need to let clients use proxyAuthz
1340          * otherwise we cannot do symmetric pools of servers;
1341          * we have to live with the fact that a user can
1342          * authorize itself as any ID that is allowed
1343          * by the authzTo directive of the "proxyauthzdn".
1344          */
1345         /*
1346          * NOTE: current Proxy Authorization specification
1347          * and implementation do not allow proxy authorization
1348          * control to be provided with Bind requests
1349          */
1350         /*
1351          * if no bind took place yet, but the connection is bound
1352          * and the "proxyauthzdn" is set, then bind as
1353          * "proxyauthzdn" and explicitly add the proxyAuthz
1354          * control to every operation with the dn bound
1355          * to the connection as control value.
1356          */
1357
1358         /* bind as proxyauthzdn only if no idassert mode
1359          * is requested, or if the client's identity
1360          * is authorized */
1361         switch ( mt->mt_idassert_mode ) {
1362         case LDAP_BACK_IDASSERT_LEGACY:
1363                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1364                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1365                         {
1366                                 *binddn = mt->mt_idassert_authcDN;
1367                                 *bindcred = mt->mt_idassert_passwd;
1368                                 dobind = 1;
1369                         }
1370                 }
1371                 break;
1372
1373         default:
1374                 /* NOTE: rootdn can always idassert */
1375                 if ( BER_BVISNULL( &ndn )
1376                         && mt->mt_idassert_authz == NULL
1377                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1378                 {
1379                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1380                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1381                                 if ( sendok & LDAP_BACK_SENDERR ) {
1382                                         send_ldap_result( op, rs );
1383                                 }
1384                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1385                                 goto done;
1386
1387                         }
1388
1389                         rs->sr_err = LDAP_SUCCESS;
1390                         *binddn = slap_empty_bv;
1391                         *bindcred = slap_empty_bv;
1392                         break;
1393
1394                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1395                         struct berval authcDN;
1396
1397                         if ( BER_BVISNULL( &ndn ) ) {
1398                                 authcDN = slap_empty_bv;
1399
1400                         } else {
1401                                 authcDN = ndn;
1402                         }
1403                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1404                                         &authcDN, &authcDN );
1405                         if ( rs->sr_err != LDAP_SUCCESS ) {
1406                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1407                                         if ( sendok & LDAP_BACK_SENDERR ) {
1408                                                 send_ldap_result( op, rs );
1409                                         }
1410                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1411                                         goto done;
1412                                 }
1413
1414                                 rs->sr_err = LDAP_SUCCESS;
1415                                 *binddn = slap_empty_bv;
1416                                 *bindcred = slap_empty_bv;
1417                                 break;
1418                         }
1419                 }
1420
1421                 *binddn = mt->mt_idassert_authcDN;
1422                 *bindcred = mt->mt_idassert_passwd;
1423                 dobind = 1;
1424                 break;
1425         }
1426
1427         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1428 #ifdef HAVE_CYRUS_SASL
1429                 void            *defaults = NULL;
1430                 struct berval   authzID = BER_BVNULL;
1431                 int             freeauthz = 0;
1432
1433                 /* if SASL supports native authz, prepare for it */
1434                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1435                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1436                 {
1437                         switch ( mt->mt_idassert_mode ) {
1438                         case LDAP_BACK_IDASSERT_OTHERID:
1439                         case LDAP_BACK_IDASSERT_OTHERDN:
1440                                 authzID = mt->mt_idassert_authzID;
1441                                 break;
1442
1443                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1444                                 BER_BVSTR( &authzID, "dn:" );
1445                                 break;
1446
1447                         case LDAP_BACK_IDASSERT_SELF:
1448                                 if ( BER_BVISNULL( &ndn ) ) {
1449                                         /* connection is not authc'd, so don't idassert */
1450                                         BER_BVSTR( &authzID, "dn:" );
1451                                         break;
1452                                 }
1453                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1454                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1455                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1456                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1457                                                 ndn.bv_val, ndn.bv_len + 1 );
1458                                 freeauthz = 1;
1459                                 break;
1460
1461                         default:
1462                                 break;
1463                         }
1464                 }
1465
1466                 if ( mt->mt_idassert_secprops != NULL ) {
1467                         rs->sr_err = ldap_set_option( msc->msc_ld,
1468                                 LDAP_OPT_X_SASL_SECPROPS,
1469                                 (void *)mt->mt_idassert_secprops );
1470
1471                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1472                                 rs->sr_err = LDAP_OTHER;
1473                                 if ( sendok & LDAP_BACK_SENDERR ) {
1474                                         send_ldap_result( op, rs );
1475                                 }
1476                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1477                                 goto done;
1478                         }
1479                 }
1480
1481                 defaults = lutil_sasl_defaults( msc->msc_ld,
1482                                 mt->mt_idassert_sasl_mech.bv_val,
1483                                 mt->mt_idassert_sasl_realm.bv_val,
1484                                 mt->mt_idassert_authcID.bv_val,
1485                                 mt->mt_idassert_passwd.bv_val,
1486                                 authzID.bv_val );
1487                 if ( defaults == NULL ) {
1488                         rs->sr_err = LDAP_OTHER;
1489                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1490                         if ( sendok & LDAP_BACK_SENDERR ) {
1491                                 send_ldap_result( op, rs );
1492                         }
1493                         goto done;
1494                 }
1495
1496                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1497                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1498                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1499                                 defaults );
1500
1501                 rs->sr_err = slap_map_api2result( rs );
1502                 if ( rs->sr_err != LDAP_SUCCESS ) {
1503                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1504                         if ( sendok & LDAP_BACK_SENDERR ) {
1505                                 send_ldap_result( op, rs );
1506                         }
1507
1508                 } else {
1509                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1510                 }
1511
1512                 lutil_sasl_freedefs( defaults );
1513                 if ( freeauthz ) {
1514                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1515                 }
1516
1517                 goto done;
1518 #endif /* HAVE_CYRUS_SASL */
1519         }
1520
1521         *method = mt->mt_idassert_authmethod;
1522         switch ( mt->mt_idassert_authmethod ) {
1523         case LDAP_AUTH_NONE:
1524                 BER_BVSTR( binddn, "" );
1525                 BER_BVSTR( bindcred, "" );
1526                 /* fallthru */
1527
1528         case LDAP_AUTH_SIMPLE:
1529                 break;
1530
1531         default:
1532                 /* unsupported! */
1533                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1534                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1535                 if ( sendok & LDAP_BACK_SENDERR ) {
1536                         send_ldap_result( op, rs );
1537                 }
1538                 break;
1539         }
1540
1541 done:;
1542
1543         if ( !BER_BVISEMPTY( binddn ) ) {
1544                 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
1545         }
1546
1547         return rs->sr_err;
1548 }
1549
1550 static int
1551 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1552 {
1553         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1554         metatarget_t            *mt = mi->mi_targets[ candidate ];
1555         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1556         struct berval           binddn = BER_BVC( "" ),
1557                                 cred = BER_BVC( "" );
1558         int                     method = LDAP_AUTH_NONE,
1559                                 rc;
1560
1561         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1562         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1563                 int     msgid;
1564
1565                 switch ( method ) {
1566                 case LDAP_AUTH_NONE:
1567                 case LDAP_AUTH_SIMPLE:
1568                         for (;;) {
1569                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1570                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1571                                         &cred, NULL, NULL, &msgid );
1572                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1573                                         break;
1574                                 }
1575                                 ldap_pvt_thread_yield();
1576                         }
1577                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1578                         if ( rc == LDAP_SUCCESS ) {
1579                                 /* set rebind stuff in case of successful proxyAuthz bind,
1580                                  * so that referral chasing is attempted using the right
1581                                  * identity */
1582                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1583                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1584
1585                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1586                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1587                                                 memset( msc->msc_cred.bv_val, 0,
1588                                                         msc->msc_cred.bv_len );
1589                                         }
1590                                         ber_bvreplace( &msc->msc_cred, &cred );
1591                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1592                                 }
1593                         }
1594                         break;
1595
1596                 default:
1597                         assert( 0 );
1598                         break;
1599                 }
1600         }
1601
1602         return LDAP_BACK_CONN_ISBOUND( msc );
1603 }
1604
1605 /*
1606  * Add controls;
1607  *
1608  * if any needs to be added, it is prepended to existing ones,
1609  * in a newly allocated array.  The companion function
1610  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1611  * status of op->o_ctrls.
1612  */
1613 int
1614 meta_back_controls_add(
1615                 Operation       *op,
1616                 SlapReply       *rs,
1617                 metaconn_t      *mc,
1618                 int             candidate,
1619                 LDAPControl     ***pctrls )
1620 {
1621         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1622         metatarget_t            *mt = mi->mi_targets[ candidate ];
1623         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1624
1625         LDAPControl             **ctrls = NULL;
1626         /* set to the maximum number of controls this backend can add */
1627         LDAPControl             c[ 2 ] = {{ 0 }};
1628         int                     n = 0, i, j1 = 0, j2 = 0;
1629
1630         *pctrls = NULL;
1631
1632         rs->sr_err = LDAP_SUCCESS;
1633
1634         /* don't add controls if protocol is not LDAPv3 */
1635         switch ( mt->mt_version ) {
1636         case LDAP_VERSION3:
1637                 break;
1638
1639         case 0:
1640                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1641                         break;
1642                 }
1643                 /* fall thru */
1644
1645         default:
1646                 goto done;
1647         }
1648
1649         /* put controls that go __before__ existing ones here */
1650
1651         /* proxyAuthz for identity assertion */
1652         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1653                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1654         {
1655         case SLAP_CB_CONTINUE:
1656                 break;
1657
1658         case LDAP_SUCCESS:
1659                 j1++;
1660                 break;
1661
1662         default:
1663                 goto done;
1664         }
1665
1666         /* put controls that go __after__ existing ones here */
1667
1668 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1669         /* session tracking */
1670         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1671                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1672                 case SLAP_CB_CONTINUE:
1673                         break;
1674
1675                 case LDAP_SUCCESS:
1676                         j2++;
1677                         break;
1678
1679                 default:
1680                         goto done;
1681                 }
1682         }
1683 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1684
1685         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1686                 rs->sr_err = LDAP_SUCCESS;
1687         }
1688
1689         /* if nothing to do, just bail out */
1690         if ( j1 == 0 && j2 == 0 ) {
1691                 goto done;
1692         }
1693
1694         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1695
1696         if ( op->o_ctrls ) {
1697                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1698                         /* just count ctrls */ ;
1699         }
1700
1701         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1702                         op->o_tmpmemctx );
1703         if ( j1 ) {
1704                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1705                 *ctrls[ 0 ] = c[ 0 ];
1706                 for ( i = 1; i < j1; i++ ) {
1707                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1708                         *ctrls[ i ] = c[ i ];
1709                 }
1710         }
1711
1712         i = 0;
1713         if ( op->o_ctrls ) {
1714                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1715                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1716                 }
1717         }
1718
1719         n += j1;
1720         if ( j2 ) {
1721                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1722                 *ctrls[ n ] = c[ j1 ];
1723                 for ( i = 1; i < j2; i++ ) {
1724                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1725                         *ctrls[ n + i ] = c[ i ];
1726                 }
1727         }
1728
1729         ctrls[ n + j2 ] = NULL;
1730
1731 done:;
1732         if ( ctrls == NULL ) {
1733                 ctrls = op->o_ctrls;
1734         }
1735
1736         *pctrls = ctrls;
1737
1738         return rs->sr_err;
1739 }
1740