git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/bind.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2006 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36
  37 int
  38 meta_back_bind( Operation *op, SlapReply *rs )
  39 {
  40         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  41         metaconn_t      *mc = NULL;
  42
  43         int             rc = LDAP_OTHER,
  44                         i,
  45                         gotit = 0,
  46                         isroot = 0;
  47
  48         SlapReply       *candidates = meta_back_candidates_get( op );
  49
  50         rs->sr_err = LDAP_SUCCESS;
  51
  52         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  53                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  54
  55         /* the test on the bind method should be superfluous */
  56         if ( op->orb_method == LDAP_AUTH_SIMPLE
  57                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  58         {
  59                 if ( !be_isroot_pw( op ) ) {
  60                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  61                         rs->sr_text = NULL;
  62                         send_ldap_result( op, rs );
  63                         return rs->sr_err;
  64                 }
  65
  66                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  67                         rs->sr_err = LDAP_SUCCESS;
  68                         rs->sr_text = NULL;
  69                         /* frontend will return success */
  70                         return rs->sr_err;
  71                 }
  72
  73                 isroot = 1;
  74         }
  75
  76         /* we need meta_back_getconn() not send result even on error,
  77          * because we want to intercept the error and make it
  78          * invalidCredentials */
  79         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  80         if ( !mc ) {
  81                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
  82                         char    buf[ SLAP_TEXT_BUFLEN ];
  83
  84                         snprintf( buf, sizeof( buf ),
  85                                 "meta_back_bind: no target "
  86                                 "for dn \"%s\" (%d%s%s).",
  87                                 op->o_req_dn.bv_val, rs->sr_err,
  88                                 rs->sr_text ? ". " : "",
  89                                 rs->sr_text ? rs->sr_text : "" );
  90                         Debug( LDAP_DEBUG_ANY,
  91                                 "%s %s\n",
  92                                 op->o_log_prefix, buf, 0 );
  93                 }
  94
  95                 /* FIXME: there might be cases where we don't want
  96                  * to map the error onto invalidCredentials */
  97                 switch ( rs->sr_err ) {
  98                 case LDAP_NO_SUCH_OBJECT:
  99                 case LDAP_UNWILLING_TO_PERFORM:
 100                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 101                         rs->sr_text = NULL;
 102                         break;
 103                 }
 104                 send_ldap_result( op, rs );
 105                 return rs->sr_err;
 106         }
 107
 108         /*
 109          * Each target is scanned ...
 110          */
 111         mc->mc_authz_target = META_BOUND_NONE;
 112         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 113                 metatarget_t    *mt = mi->mi_targets[ i ];
 114                 int             lerr;
 115                 Operation       op2 = *op;
 116                 int             massage = 1;
 117
 118                 /*
 119                  * Skip non-candidates
 120                  */
 121                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 122                         continue;
 123                 }
 124
 125                 if ( gotit == 0 ) {
 126                         /* set rc to LDAP_SUCCESS only if at least
 127                          * one candidate has been tried */
 128                         rc = LDAP_SUCCESS;
 129                         gotit = 1;
 130
 131                 } else if ( isroot == 0 ) {
 132                         /*
 133                          * A bind operation is expected to have
 134                          * ONE CANDIDATE ONLY!
 135                          */
 136                         Debug( LDAP_DEBUG_ANY,
 137                                 "### %s meta_back_bind: more than one"
 138                                 " candidate selected...\n",
 139                                 op->o_log_prefix, 0, 0 );
 140                 }
 141
 142                 if ( isroot ) {
 143                         if ( BER_BVISNULL( &mt->mt_pseudorootdn ) )
 144                         {
 145                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 146
 147                                 /* skip the target if no pseudorootdn is provided */
 148                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 149                                         ch_free( msc->msc_bound_ndn.bv_val );
 150                                         BER_BVZERO( &msc->msc_bound_ndn );
 151                                 }
 152
 153                                 if ( LDAP_BACK_SAVECRED( mi ) &&
 154                                         !BER_BVISNULL( &msc->msc_cred ) )
 155                                 {
 156                                         /* destroy sensitive data */
 157                                         memset( msc->msc_cred.bv_val, 0,
 158                                                 msc->msc_cred.bv_len );
 159                                         ch_free( msc->msc_cred.bv_val );
 160                                         BER_BVZERO( &msc->msc_cred );
 161                                 }
 162
 163                                 continue;
 164                         }
 165
 166                         op2.o_req_dn = mt->mt_pseudorootdn;
 167                         op2.o_req_ndn = mt->mt_pseudorootdn;
 168                         op2.orb_cred = mt->mt_pseudorootpw;
 169                         op2.orb_method = LDAP_AUTH_SIMPLE;
 170
 171                         massage = 0;
 172                 }
 173
 174                 lerr = meta_back_single_bind( &op2, rs, mc, i, massage );
 175
 176                 if ( lerr != LDAP_SUCCESS ) {
 177                         rc = rs->sr_err = lerr;
 178                         /* FIXME: in some cases (e.g. unavailable)
 179                          * do not assume it's not candidate; rather
 180                          * mark this as an error to be eventually
 181                          * reported to client */
 182                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 183                         break;
 184                 }
 185         }
 186
 187         /* must re-insert if local DN changed as result of bind */
 188         if ( rc == LDAP_SUCCESS ) {
 189                 if ( isroot ) {
 190                         mc->mc_authz_target = META_BOUND_ALL;
 191                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 192                 }
 193
 194                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 195                         metaconn_t      *tmpmc;
 196                         int             lerr;
 197
 198                         /* wait for all other ops to release the connection */
 199 retry_lock:;
 200                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 201                         if ( mc->mc_refcnt > 1 ) {
 202                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 203                                 ldap_pvt_thread_yield();
 204                                 goto retry_lock;
 205                         }
 206
 207                         assert( mc->mc_refcnt == 1 );
 208                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 209                                 meta_back_conndn_cmp );
 210                         assert( tmpmc == mc );
 211
 212                         /* delete all cached connections with the current connection */
 213                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 214                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 215                                 {
 216                                         Debug( LDAP_DEBUG_TRACE,
 217                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 218                                                 LDAP_BACK_PCONN_ID( mc->mc_conn ), mc->mc_refcnt, 0 );
 219
 220                                         if ( mc->mc_refcnt != 0 ) {
 221                                                 /* taint it */
 222                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 223
 224                                         } else {
 225                                                 /*
 226                                                  * Needs a test because the handler may be corrupted,
 227                                                  * and calling ldap_unbind on a corrupted header results
 228                                                  * in a segmentation fault
 229                                                  */
 230                                                 meta_back_conn_free( tmpmc );
 231                                         }
 232                                 }
 233                         }
 234
 235                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 236                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 237                                 mc->mc_conn = LDAP_BACK_PCONN_SET( op );
 238                         }
 239                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 240                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 241                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 242                         if ( lerr == -1 ) {
 243                                 meta_clear_candidates( op, mc );
 244
 245                                 /* we can do this because mc_refcnt == 1 */
 246                                 mc->mc_refcnt = 0;
 247                                 meta_back_conn_free( mc );
 248                                 mc = NULL;
 249                         }
 250                 }
 251         }
 252
 253         if ( mc != NULL ) {
 254                 meta_back_release_conn( op, mc );
 255         }
 256
 257         /*
 258          * rc is LDAP_SUCCESS if at least one bind succeeded,
 259          * err is the last error that occurred during a bind;
 260          * if at least (and at most?) one bind succeeds, fine.
 261          */
 262         if ( rc != LDAP_SUCCESS ) {
 263
 264                 /*
 265                  * deal with bind failure ...
 266                  */
 267
 268                 /*
 269                  * no target was found within the naming context,
 270                  * so bind must fail with invalid credentials
 271                  */
 272                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 273                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 274                 } else {
 275                         rs->sr_err = slap_map_api2result( rs );
 276                 }
 277                 send_ldap_result( op, rs );
 278                 return rs->sr_err;
 279
 280         }
 281
 282         return LDAP_SUCCESS;
 283 }
 284
 285 /*
 286  * meta_back_single_bind
 287  *
 288  * attempts to perform a bind with creds
 289  */
 290 int
 291 meta_back_single_bind(
 292         Operation               *op,
 293         SlapReply               *rs,
 294         metaconn_t              *mc,
 295         int                     candidate,
 296         int                     massage )
 297 {
 298         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 299         metatarget_t            *mt = mi->mi_targets[ candidate ];
 300         struct berval           mdn = BER_BVNULL;
 301         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 302         int                     msgid,
 303                                 rebinding = 0;
 304
 305
 306         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 307                 ch_free( msc->msc_bound_ndn.bv_val );
 308                 BER_BVZERO( &msc->msc_bound_ndn );
 309         }
 310
 311         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 312                 /* destroy sensitive data */
 313                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 314                 ch_free( msc->msc_cred.bv_val );
 315                 BER_BVZERO( &msc->msc_cred );
 316         }
 317
 318         /*
 319          * Rewrite the bind dn if needed
 320          */
 321         if ( massage ) {
 322                 dncookie                dc;
 323
 324                 dc.target = mt;
 325                 dc.conn = op->o_conn;
 326                 dc.rs = rs;
 327                 dc.ctx = "bindDN";
 328
 329                 if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 330                         rs->sr_text = "DN rewrite error";
 331                         rs->sr_err = LDAP_OTHER;
 332                         return rs->sr_err;
 333                 }
 334
 335         } else {
 336                 mdn = op->o_req_dn;
 337         }
 338
 339         /* FIXME: this fixes the bind problem right now; we need
 340          * to use the asynchronous version to get the "matched"
 341          * and more in case of failure ... */
 342         /* FIXME: should we check if at least some of the op->o_ctrls
 343          * can/should be passed? */
 344 rebind:;
 345         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 346                         LDAP_SASL_SIMPLE, &op->orb_cred,
 347                         op->o_ctrls, NULL, &msgid );
 348         if ( rs->sr_err == LDAP_SUCCESS ) {
 349                 LDAPMessage     *res;
 350                 struct timeval  tv;
 351                 int             rc;
 352                 int             nretries = mt->mt_nretries;
 353                 char            buf[ SLAP_TEXT_BUFLEN ];
 354
 355                 LDAP_BACK_TV_SET( &tv );
 356
 357                 /*
 358                  * handle response!!!
 359                  */
 360 retry:;
 361                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 362                 case 0:
 363                         snprintf( buf, sizeof( buf ),
 364                                 "ldap_result=0 nretries=%d%s",
 365                                 nretries, rebinding ? " rebinding" : "" );
 366                         Debug( LDAP_DEBUG_ANY,
 367                                 "%s meta_back_single_bind[%d]: %s.\n",
 368                                 op->o_log_prefix, candidate, buf );
 369
 370                         if ( nretries != META_RETRY_NEVER ) {
 371                                 ldap_pvt_thread_yield();
 372                                 if ( nretries > 0 ) {
 373                                         nretries--;
 374                                 }
 375                                 tv = mt->mt_bind_timeout;
 376                                 goto retry;
 377                         }
 378
 379                         rs->sr_err = LDAP_BUSY;
 380                         if ( rebinding ) {
 381                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 382                                 break;
 383                         }
 384
 385                         /* FIXME: some times the request times out
 386                          * while the other party is not willing to
 387                          * send a response any more.  Give it a second
 388                          * chance with a freshly bound connection */
 389                         rebinding = 1;
 390                         nretries = mt->mt_nretries;
 391                         /* fallthru */
 392
 393                 case -1:
 394                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 395                                 &rs->sr_err );
 396
 397                         if ( rebinding ) {
 398                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 399                         }
 400
 401                         snprintf( buf, sizeof( buf ),
 402                                 "err=%d (%s) nretries=%d",
 403                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 404                         Debug( LDAP_DEBUG_ANY,
 405                                 "### %s meta_back_single_bind[%d]: %s.\n",
 406                                 op->o_log_prefix, candidate, buf );
 407
 408                         rc = slap_map_api2result( rs );
 409                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 410                                 rc = meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_DONTSEND );
 411                                 if ( rc ) {
 412                                         if ( nretries > 0 ) {
 413                                                 nretries--;
 414                                         }
 415                                         ldap_pvt_thread_yield();
 416                                         goto rebind;
 417                                 }
 418                                 goto return_results;
 419                         }
 420                         break;
 421
 422                 default:
 423                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 424                                         NULL, NULL, NULL, NULL, 1 );
 425                         if ( rc != LDAP_SUCCESS ) {
 426                                 rs->sr_err = rc;
 427                         }
 428                         break;
 429                 }
 430         }
 431
 432         if ( rs->sr_err != LDAP_SUCCESS ) {
 433                 rs->sr_err = slap_map_api2result( rs );
 434                 goto return_results;
 435         }
 436
 437         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 438         LDAP_BACK_CONN_ISBOUND_SET( msc );
 439         mc->mc_authz_target = candidate;
 440
 441         if ( LDAP_BACK_SAVECRED( mi ) ) {
 442                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 443                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 444         }
 445
 446         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 447                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 448         {
 449                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 450                                 &op->o_req_ndn, candidate );
 451         }
 452
 453 return_results:;
 454         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 455                 free( mdn.bv_val );
 456         }
 457
 458         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 459                 meta_back_quarantine( op, rs, candidate );
 460         }
 461
 462         return rs->sr_err;
 463 }
 464
 465 /*
 466  * meta_back_single_dobind
 467  */
 468 int
 469 meta_back_single_dobind(
 470         Operation               *op,
 471         SlapReply               *rs,
 472         metaconn_t              **mcp,
 473         int                     candidate,
 474         ldap_back_send_t        sendok,
 475         int                     nretries,
 476         int                     dolock )
 477 {
 478         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 479         metatarget_t            *mt = mi->mi_targets[ candidate ];
 480         metaconn_t              *mc = *mcp;
 481         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 482         int                     rc;
 483         static struct berval    cred = BER_BVC( "" );
 484         int                     msgid,
 485                                 rebinding = 0,
 486                                 save_nretries = nretries;
 487
 488         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 489
 490         /*
 491          * meta_back_single_dobind() calls meta_back_single_bind()
 492          * if required.
 493          */
 494         if ( be_isroot( op ) && !BER_BVISNULL( &mt->mt_pseudorootdn ) )
 495         {
 496                 Operation       op2 = *op;
 497
 498                 op2.o_tag = LDAP_REQ_BIND;
 499                 op2.o_req_dn = mt->mt_pseudorootdn;
 500                 op2.o_req_ndn = mt->mt_pseudorootdn;
 501                 op2.orb_cred = mt->mt_pseudorootpw;
 502                 op2.orb_method = LDAP_AUTH_SIMPLE;
 503
 504                 rc = meta_back_single_bind( &op2, rs, *mcp, candidate, 0 );
 505                 goto done;
 506         }
 507
 508         /*
 509          * Otherwise an anonymous bind is performed
 510          * (note: if the target was already bound, the anonymous
 511          * bind clears the previous bind).
 512          */
 513         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 514                 ber_memfree( msc->msc_bound_ndn.bv_val );
 515                 BER_BVZERO( &msc->msc_bound_ndn );
 516         }
 517
 518         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 519                 /* destroy sensitive data */
 520                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 521                 ber_memfree( msc->msc_cred.bv_val );
 522                 BER_BVZERO( &msc->msc_cred );
 523         }
 524
 525         /* FIXME: should we check if at least some of the op->o_ctrls
 526          * can/should be passed? */
 527 rebind:;
 528         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 529                         NULL, NULL, &msgid );
 530         if ( rc == LDAP_SUCCESS ) {
 531                 LDAPMessage     *res;
 532                 struct timeval  tv;
 533                 char            buf[ SLAP_TEXT_BUFLEN ];
 534
 535                 LDAP_BACK_TV_SET( &tv );
 536
 537                 /*
 538                  * handle response!!!
 539                  */
 540 retry:;
 541                 switch ( ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 542                 case 0:
 543                         snprintf( buf, sizeof( buf ),
 544                                 "ldap_result=0 nretries=%d%s",
 545                                 nretries, rebinding ? " rebinding" : "" );
 546                         Debug( LDAP_DEBUG_ANY,
 547                                 "%s meta_back_single_dobind[%d]: %s.\n",
 548                                 op->o_log_prefix, candidate, buf );
 549
 550                         if ( nretries != META_RETRY_NEVER ) {
 551                                 ldap_pvt_thread_yield();
 552                                 if ( nretries > 0 ) {
 553                                         nretries--;
 554                                 }
 555                                 tv = mt->mt_bind_timeout;
 556                                 goto retry;
 557                         }
 558
 559                         rc = LDAP_BUSY;
 560                         if ( rebinding ) {
 561                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 562                                 break;
 563                         }
 564
 565                         /* FIXME: some times the request times out
 566                          * while the other party is not willing to
 567                          * send a response any more.  Give it a second
 568                          * chance with a freshly bound connection */
 569                         rebinding = 1;
 570                         nretries = save_nretries;
 571                         /* fallthru */
 572
 573                 case -1:
 574                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 575                                 &rs->sr_err );
 576
 577                         if ( rebinding ) {
 578                                 (void)meta_back_cancel( mc, op, rs, msgid, candidate, LDAP_BACK_DONTSEND );
 579                         }
 580
 581                         snprintf( buf, sizeof( buf ),
 582                                 "err=%d (%s) nretries=%d",
 583                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 584                         Debug( LDAP_DEBUG_ANY,
 585                                 "### %s meta_back_single_dobind[%d]: %s.\n",
 586                                 op->o_log_prefix, candidate, buf );
 587
 588                         rc = slap_map_api2result( rs );
 589                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 590                                 if ( dolock ) {
 591                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 592                                 }
 593
 594                                 if ( mc->mc_refcnt == 1 ) {
 595                                         meta_clear_one_candidate( msc );
 596                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
 597
 598                                         ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );
 599
 600                                         /* mc here must be the regular mc,
 601                                          * reset and ready for init */
 602                                         rc = meta_back_init_one_conn( op, rs,
 603                                                 mc, candidate,
 604                                                 LDAP_BACK_CONN_ISPRIV( mc ),
 605                                                 LDAP_BACK_DONTSEND );
 606                                         if ( rc == LDAP_SUCCESS ) {
 607                                                 LDAP_BACK_CONN_BINDING_SET( msc );
 608                                         }
 609
 610                                 } else {
 611                                         /* can't do anything about it */
 612                                         rc = LDAP_UNAVAILABLE;
 613                                 }
 614
 615                                 if ( dolock ) {
 616                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 617                                 }
 618
 619                                 if ( rc == LDAP_SUCCESS ) {
 620                                         ldap_pvt_thread_yield();
 621                                         if ( nretries > 0 ) {
 622                                                 nretries--;
 623                                         }
 624                                         goto rebind;
 625                                 }
 626                         }
 627                         break;
 628
 629                 default:
 630                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 631                                         NULL, NULL, NULL, NULL, 1 );
 632                         if ( rc == LDAP_SUCCESS ) {
 633                                 rc = slap_map_api2result( rs );
 634                         }
 635                         break;
 636                 }
 637
 638         } else {
 639                 rs->sr_err = rc;
 640                 rc = slap_map_api2result( rs );
 641         }
 642
 643 done:;
 644         rs->sr_err = rc;
 645         if ( rc != LDAP_SUCCESS ) {
 646                 if ( dolock ) {
 647                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 648                 }
 649                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 650                 if ( META_BACK_ONERR_STOP( mi ) ) {
 651                         LDAP_BACK_CONN_TAINTED_SET( mc );
 652                         meta_back_release_conn_lock( op, mc, 0 );
 653                         *mcp = NULL;
 654                 }
 655                 if ( dolock ) {
 656                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 657                 }
 658
 659                 if ( META_BACK_ONERR_STOP( mi ) && ( sendok & LDAP_BACK_SENDERR ) ) {
 660                         send_ldap_result( op, rs );
 661                 }
 662         }
 663
 664         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 665                 meta_back_quarantine( op, rs, candidate );
 666         }
 667
 668         return rc;
 669 }
 670
 671 /*
 672  * meta_back_dobind
 673  */
 674 int
 675 meta_back_dobind(
 676         Operation               *op,
 677         SlapReply               *rs,
 678         metaconn_t              *mc,
 679         ldap_back_send_t        sendok )
 680 {
 681         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 682
 683         int                     bound = 0,
 684                                 i,
 685                                 isroot = 0;
 686
 687         SlapReply               *candidates = meta_back_candidates_get( op );
 688
 689         if ( be_isroot( op ) ) {
 690                 isroot = 1;
 691         }
 692
 693         Debug( LDAP_DEBUG_TRACE,
 694                 "%s meta_back_dobind: conn=%ld%s\n",
 695                 op->o_log_prefix,
 696                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 697                 isroot ? " (isroot)" : "" );
 698
 699         /*
 700          * all the targets are bound as pseudoroot
 701          */
 702         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 703                 bound = 1;
 704                 goto done;
 705         }
 706
 707         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 708                 metatarget_t            *mt = mi->mi_targets[ i ];
 709                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 710                 int                     rc, do_retry = 1;
 711
 712                 /*
 713                  * Not a candidate
 714                  */
 715                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 716                         continue;
 717                 }
 718
 719                 assert( msc->msc_ld != NULL );
 720
 721                 /*
 722                  * If the target is already bound it is skipped
 723                  */
 724
 725 retry_binding:;
 726                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 727                 if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
 728                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 729                         ++bound;
 730                         continue;
 731
 732                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 733                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 734                         ldap_pvt_thread_yield();
 735                         goto retry_binding;
 736
 737                 }
 738
 739                 LDAP_BACK_CONN_BINDING_SET( msc );
 740                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 741
 742 retry:;
 743                 rc = meta_back_single_dobind( op, rs, &mc, i,
 744                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 745                 /*
 746                  * NOTE: meta_back_single_dobind() already retries;
 747                  * in case of failure, it resets mc...
 748                  */
 749                 if ( rc != LDAP_SUCCESS ) {
 750                         char            buf[ SLAP_TEXT_BUFLEN ];
 751
 752                         if ( mc == NULL ) {
 753                                 /* meta_back_single_dobind() already sent
 754                                  * response and released connection */
 755                                 goto send_err;
 756                         }
 757
 758
 759                         if ( rc == LDAP_UNAVAILABLE && do_retry ) {
 760                                 do_retry = 0;
 761                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 762                                         goto retry;
 763                                 }
 764
 765                                 if ( mc != NULL ) {
 766                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 767                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 768                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 769                                 }
 770
 771                                 return 0;
 772                         }
 773
 774                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 775                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 776                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 777
 778                         snprintf( buf, sizeof( buf ),
 779                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 780                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 781                                 rc, ldap_err2string( rc ) );
 782                         Debug( LDAP_DEBUG_ANY,
 783                                 "%s %s\n",
 784                                 op->o_log_prefix, buf, 0 );
 785
 786                         /*
 787                          * null cred bind should always succeed
 788                          * as anonymous, so a failure means
 789                          * the target is no longer candidate possibly
 790                          * due to technical reasons (remote host down?)
 791                          * so better clear the handle
 792                          */
 793                         /* leave the target candidate, but record the error for later use */
 794                         candidates[ i ].sr_err = rc;
 795                         if ( META_BACK_ONERR_STOP( mi ) ) {
 796                                 bound = 0;
 797                                 goto done;
 798                         }
 799
 800                         continue;
 801                 } /* else */
 802
 803                 Debug( LDAP_DEBUG_TRACE,
 804                         "%s meta_back_dobind[%d]: "
 805                         "(%s)\n",
 806                         op->o_log_prefix, i,
 807                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 808
 809                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 810                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 811                 if ( isroot ) {
 812                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 813                 } else {
 814                         LDAP_BACK_CONN_ISANON_SET( msc );
 815                 }
 816                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 817                 ++bound;
 818         }
 819
 820 done:;
 821         Debug( LDAP_DEBUG_TRACE,
 822                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 823                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 824
 825         if ( bound == 0 ) {
 826                 meta_back_release_conn( op, mc );
 827
 828 send_err:;
 829                 if ( sendok & LDAP_BACK_SENDERR ) {
 830                         if ( rs->sr_err == LDAP_SUCCESS ) {
 831                                 rs->sr_err = LDAP_BUSY;
 832                         }
 833                         send_ldap_result( op, rs );
 834                 }
 835
 836                 return 0;
 837         }
 838
 839         return ( bound > 0 );
 840 }
 841
 842 /*
 843  * meta_back_default_rebind
 844  *
 845  * This is a callback used for chasing referrals using the same
 846  * credentials as the original user on this session.
 847  */
 848 int
 849 meta_back_default_rebind(
 850         LDAP                    *ld,
 851         LDAP_CONST char         *url,
 852         ber_tag_t               request,
 853         ber_int_t               msgid,
 854         void                    *params )
 855 {
 856         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 857
 858         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 859                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 860                         NULL, NULL, NULL );
 861 }
 862
 863 /*
 864  * meta_back_default_urllist
 865  *
 866  * This is a callback used for mucking with the urllist
 867  */
 868 int
 869 meta_back_default_urllist(
 870         LDAP            *ld,
 871         LDAPURLDesc     **urllist,
 872         LDAPURLDesc     **url,
 873         void            *params )
 874 {
 875         metatarget_t    *mt = (metatarget_t *)params;
 876         LDAPURLDesc     **urltail;
 877
 878         if ( urllist == url ) {
 879                 return LDAP_SUCCESS;
 880         }
 881
 882         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 883                 /* count */ ;
 884
 885         *urltail = *urllist;
 886         *urllist = *url;
 887         *url = NULL;
 888
 889         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 890         if ( mt->mt_uri ) {
 891                 ch_free( mt->mt_uri );
 892         }
 893
 894         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 895         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 896
 897         return LDAP_SUCCESS;
 898 }
 899
 900 int
 901 meta_back_cancel(
 902         metaconn_t              *mc,
 903         Operation               *op,
 904         SlapReply               *rs,
 905         ber_int_t               msgid,
 906         int                     candidate,
 907         ldap_back_send_t        sendok )
 908 {
 909         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 910
 911         metatarget_t            *mt = mi->mi_targets[ candidate ];
 912         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 913
 914         /* default behavior */
 915         if ( META_BACK_TGT_ABANDON( mt ) ) {
 916                 return ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 917         }
 918
 919         if ( META_BACK_TGT_IGNORE( mt ) ) {
 920                 return LDAP_SUCCESS;
 921         }
 922
 923         if ( META_BACK_TGT_CANCEL( mt ) ) {
 924                 /* FIXME: asynchronous? */
 925                 return ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 926         }
 927
 928         assert( 0 );
 929
 930         return LDAP_OTHER;
 931 }
 932
 933
 934
 935 /*
 936  * FIXME: error return must be handled in a cleaner way ...
 937  */
 938 int
 939 meta_back_op_result(
 940         metaconn_t      *mc,
 941         Operation       *op,
 942         SlapReply       *rs,
 943         int             candidate )
 944 {
 945         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 946
 947         int                     i,
 948                                 rerr = LDAP_SUCCESS;
 949         char                    *rmsg = NULL,
 950                                 *rmatch = NULL;
 951         const char              *save_rmsg = NULL,
 952                                 *save_rmatch = NULL;
 953         void                    *rmatch_ctx = NULL;
 954
 955         assert( mc != NULL );
 956
 957         if ( candidate != META_TARGET_NONE ) {
 958                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 959
 960                 rs->sr_err = LDAP_SUCCESS;
 961
 962                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 963                 if ( rs->sr_err != LDAP_SUCCESS ) {
 964                         /*
 965                          * better check the type of error. In some cases
 966                          * (search ?) it might be better to return a
 967                          * success if at least one of the targets gave
 968                          * positive result ...
 969                          */
 970                         ldap_get_option( msc->msc_ld,
 971                                         LDAP_OPT_ERROR_STRING, &rmsg );
 972                         if ( rmsg != NULL && rmsg[ 0 ] == '\0' ) {
 973                                 ldap_memfree( rmsg );
 974                                 rmsg = NULL;
 975                         }
 976
 977                         ldap_get_option( msc->msc_ld,
 978                                         LDAP_OPT_MATCHED_DN, &rmatch );
 979                         if ( rmatch != NULL && rmatch[ 0 ] == '\0' ) {
 980                                 ldap_memfree( rmatch );
 981                                 rmatch = NULL;
 982                         }
 983
 984                         rerr = rs->sr_err = slap_map_api2result( rs );
 985
 986                         Debug(LDAP_DEBUG_ANY,
 987                                         "==> meta_back_op_result[%d] "
 988                                         "text=\"%s\" matched=\"%s\"\n",
 989                                         candidate, ( rmsg ? rmsg : "" ),
 990                                         ( rmatch ? rmatch : "" ) );
 991                 }
 992
 993                 if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ candidate ] ) ) {
 994                         meta_back_quarantine( op, rs, candidate );
 995                 }
 996
 997         } else {
 998                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 999                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1000                         char                    *msg = NULL;
1001                         char                    *match = NULL;
1002
1003                         rs->sr_err = LDAP_SUCCESS;
1004
1005                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
1006                         if ( rs->sr_err != LDAP_SUCCESS ) {
1007                                 /*
1008                                  * better check the type of error. In some cases
1009                                  * (search ?) it might be better to return a
1010                                  * success if at least one of the targets gave
1011                                  * positive result ...
1012                                  */
1013                                 ldap_get_option( msc->msc_ld,
1014                                                 LDAP_OPT_ERROR_STRING, &msg );
1015                                 if ( msg != NULL && msg[ 0 ] == '\0' ) {
1016                                         ldap_memfree( msg );
1017                                         msg = NULL;
1018                                 }
1019
1020                                 ldap_get_option( msc->msc_ld,
1021                                                 LDAP_OPT_MATCHED_DN, &match );
1022                                 if ( match != NULL && match[ 0 ] == '\0' ) {
1023                                         ldap_memfree( match );
1024                                         match = NULL;
1025                                 }
1026
1027                                 rs->sr_err = slap_map_api2result( rs );
1028
1029                                 Debug(LDAP_DEBUG_ANY,
1030                                                 "==> meta_back_op_result[%d] "
1031                                                 "text=\"%s\" 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_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1068                                 meta_back_quarantine( op, rs, i );
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