git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/search.c

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2007 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn );
  42
  43 /*
  44  * Quick'n'dirty rewrite of filter in case of error, to deal with
  45  * <draft-zeilenga-ldap-t-f>.
  46  */
  47 static int
  48 ldap_back_munge_filter(
  49         Operation       *op,
  50         struct berval   *filter )
  51 {
  52         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  53
  54         char            *ptr;
  55         int             gotit = 0;
  56
  57         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  58                         filter->bv_val, 0, 0 );
  59
  60         for ( ptr = strstr( filter->bv_val, "(?=" );
  61                         ptr;
  62                         ptr = strstr( ptr, "(?=" ) )
  63         {
  64                 static struct berval
  65                         bv_true = BER_BVC( "(?=true)" ),
  66                         bv_false = BER_BVC( "(?=false)" ),
  67                         bv_undefined = BER_BVC( "(?=undefined)" ),
  68                         bv_t = BER_BVC( "(&)" ),
  69                         bv_f = BER_BVC( "(|)" ),
  70                         bv_T = BER_BVC( "(objectClass=*)" ),
  71                         bv_F = BER_BVC( "(!(objectClass=*))" );
  72                 struct berval   *oldbv = NULL,
  73                                 *newbv = NULL,
  74                                 oldfilter = BER_BVNULL;
  75
  76                 if ( strncmp( ptr, bv_true.bv_val, bv_true.bv_len ) == 0 ) {
  77                         oldbv = &bv_true;
  78                         if ( LDAP_BACK_T_F( li ) ) {
  79                                 newbv = &bv_t;
  80
  81                         } else {
  82                                 newbv = &bv_T;
  83                         }
  84
  85                 } else if ( strncmp( ptr, bv_false.bv_val, bv_false.bv_len ) == 0 )
  86                 {
  87                         oldbv = &bv_false;
  88                         if ( LDAP_BACK_T_F( li ) ) {
  89                                 newbv = &bv_f;
  90
  91                         } else {
  92                                 newbv = &bv_F;
  93                         }
  94
  95                 } else if ( strncmp( ptr, bv_undefined.bv_val, bv_undefined.bv_len ) == 0 )
  96                 {
  97                         oldbv = &bv_undefined;
  98                         newbv = &bv_F;
  99
 100                 } else {
 101                         gotit = 0;
 102                         goto done;
 103                 }
 104
 105                 oldfilter = *filter;
 106                 if ( newbv->bv_len > oldbv->bv_len ) {
 107                         filter->bv_len += newbv->bv_len - oldbv->bv_len;
 108                         if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 109                                 filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 110                                                 op->o_tmpmemctx );
 111
 112                                 AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 113                                                 op->ors_filterstr.bv_len + 1 );
 114
 115                         } else {
 116                                 filter->bv_val = op->o_tmprealloc( filter->bv_val,
 117                                                 filter->bv_len + 1, op->o_tmpmemctx );
 118                         }
 119
 120                         ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 121                 }
 122
 123                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 124                                 &ptr[ oldbv->bv_len ],
 125                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 126                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 127
 128                 ptr += newbv->bv_len;
 129                 gotit = 1;
 130         }
 131
 132 done:;
 133         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 134                         filter->bv_val, gotit, 0 );
 135
 136         return gotit;
 137 }
 138
 139 int
 140 ldap_back_search(
 141                 Operation       *op,
 142                 SlapReply       *rs )
 143 {
 144         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 145
 146         ldapconn_t      *lc = NULL;
 147         struct timeval  tv;
 148         time_t          stoptime = (time_t)(-1);
 149         LDAPMessage     *res,
 150                         *e;
 151         int             rc = 0,
 152                         msgid;
 153         struct berval   match = BER_BVNULL,
 154                         filter = BER_BVNULL;
 155         int             free_filter = 0;
 156         int             i;
 157         char            **attrs = NULL;
 158         int             freetext = 0;
 159         int             do_retry = 1, dont_retry = 0;
 160         LDAPControl     **ctrls = NULL;
 161         /* FIXME: shouldn't this be null? */
 162         const char      *save_matched = rs->sr_matched;
 163
 164         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 165                 return rs->sr_err;
 166         }
 167
 168         /*
 169          * FIXME: in case of values return filter, we might want
 170          * to map attrs and maybe rewrite value
 171          */
 172
 173         /* should we check return values? */
 174         if ( op->ors_deref != -1 ) {
 175                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 176                                 (void *)&op->ors_deref );
 177         }
 178
 179         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 180                 tv.tv_sec = op->ors_tlimit;
 181                 tv.tv_usec = 0;
 182                 stoptime = op->o_time + op->ors_tlimit;
 183
 184         } else {
 185                 LDAP_BACK_TV_SET( &tv );
 186         }
 187
 188         if ( op->ors_attrs ) {
 189                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 190                         /* just count attrs */ ;
 191
 192                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 193                 if ( attrs == NULL ) {
 194                         rs->sr_err = LDAP_NO_MEMORY;
 195                         rc = -1;
 196                         goto finish;
 197                 }
 198
 199                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 200                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 201                 }
 202                 attrs[ i ] = NULL;
 203         }
 204
 205         ctrls = op->o_ctrls;
 206         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 207                 li->li_version, &li->li_idassert, op, rs, &ctrls );
 208         if ( rc != LDAP_SUCCESS ) {
 209                 goto finish;
 210         }
 211
 212         /* deal with <draft-zeilenga-ldap-t-f> filters */
 213         filter = op->ors_filterstr;
 214 retry:
 215         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 216                         op->ors_scope, filter.bv_val,
 217                         attrs, op->ors_attrsonly, ctrls, NULL,
 218                         tv.tv_sec ? &tv : NULL,
 219                         op->ors_slimit, &msgid );
 220
 221         if ( rs->sr_err != LDAP_SUCCESS ) {
 222                 switch ( rs->sr_err ) {
 223                 case LDAP_SERVER_DOWN:
 224                         if ( do_retry ) {
 225                                 do_retry = 0;
 226                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 227                                         goto retry;
 228                                 }
 229                         }
 230
 231                         if ( lc == NULL ) {
 232                                 /* reset by ldap_back_retry ... */
 233                                 rs->sr_err = slap_map_api2result( rs );
 234
 235                         } else {
 236                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 237                         }
 238
 239                         goto finish;
 240
 241                 case LDAP_FILTER_ERROR:
 242                         if ( ldap_back_munge_filter( op, &filter ) ) {
 243                                 free_filter = 1;
 244                                 goto retry;
 245                         }
 246
 247                         /* invalid filters return success with no data */
 248                         rs->sr_err = LDAP_SUCCESS;
 249                         rs->sr_text = NULL;
 250                         goto finish;
 251
 252                 default:
 253                         rs->sr_err = slap_map_api2result( rs );
 254                         rs->sr_text = NULL;
 255                         goto finish;
 256                 }
 257         }
 258
 259         /* if needed, initialize timeout */
 260         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 261                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 262                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 263                         tv.tv_usec = 0;
 264                 }
 265         }
 266
 267         /* We pull apart the ber result, stuff it into a slapd entry, and
 268          * let send_search_entry stuff it back into ber format. Slow & ugly,
 269          * but this is necessary for version matching, and for ACL processing.
 270          */
 271
 272         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 273         {
 274                 /* check for abandon */
 275                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 276                         if ( rc > 0 ) {
 277                                 ldap_msgfree( res );
 278                         }
 279                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 280                         rc = SLAPD_ABANDON;
 281                         goto finish;
 282                 }
 283
 284                 if ( rc == 0 || rc == -2 ) {
 285                         ldap_pvt_thread_yield();
 286
 287                         /* check timeout */
 288                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 289                                 if ( rc == 0 ) {
 290                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 291                                         rs->sr_text = "Operation timed out";
 292                                         rc = rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 293                                         goto finish;
 294                                 }
 295
 296                         } else {
 297                                 LDAP_BACK_TV_SET( &tv );
 298                         }
 299
 300                         /* check time limit */
 301                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 302                                         && slap_get_time() > stoptime )
 303                         {
 304                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 305                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 306                                 goto finish;
 307                         }
 308                         continue;
 309
 310                 } else {
 311                         /* only touch when activity actually took place... */
 312                         if ( li->li_idle_timeout && lc ) {
 313                                 lc->lc_time = op->o_time;
 314                         }
 315
 316                         /* don't retry any more */
 317                         dont_retry = 1;
 318                 }
 319
 320
 321                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 322                         Entry           ent = { 0 };
 323                         struct berval   bdn = BER_BVNULL;
 324
 325                         do_retry = 0;
 326
 327                         e = ldap_first_entry( lc->lc_ld, res );
 328                         rc = ldap_build_entry( op, e, &ent, &bdn );
 329                         if ( rc == LDAP_SUCCESS ) {
 330                                 rs->sr_entry = &ent;
 331                                 rs->sr_attrs = op->ors_attrs;
 332                                 rs->sr_operational_attrs = NULL;
 333                                 rs->sr_flags = 0;
 334                                 rs->sr_err = LDAP_SUCCESS;
 335                                 rc = rs->sr_err = send_search_entry( op, rs );
 336                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 337                                         assert( ent.e_name.bv_val != bdn.bv_val );
 338                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 339                                         BER_BVZERO( &ent.e_name );
 340                                 }
 341                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 342                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 343                                         BER_BVZERO( &ent.e_nname );
 344                                 }
 345                                 entry_clean( &ent );
 346                         }
 347                         ldap_msgfree( res );
 348                         if ( rc != LDAP_SUCCESS ) {
 349                                 if ( rc == LDAP_UNAVAILABLE ) {
 350                                         rc = rs->sr_err = LDAP_OTHER;
 351                                 } else {
 352                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 353                                 }
 354                                 goto finish;
 355                         }
 356
 357                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 358                         char            **references = NULL;
 359
 360                         do_retry = 0;
 361                         rc = ldap_parse_reference( lc->lc_ld, res,
 362                                         &references, &rs->sr_ctrls, 1 );
 363
 364                         if ( rc != LDAP_SUCCESS ) {
 365                                 continue;
 366                         }
 367
 368                         /* FIXME: there MUST be at least one */
 369                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 370                                 int             cnt;
 371
 372                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 373                                         /* NO OP */ ;
 374
 375                                 /* FIXME: there MUST be at least one */
 376                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 377                                         op->o_tmpmemctx );
 378
 379                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 380                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 381                                 }
 382                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 383
 384                                 /* ignore return value by now */
 385                                 ( void )send_search_reference( op, rs );
 386
 387                         } else {
 388                                 Debug( LDAP_DEBUG_ANY,
 389                                         "%s ldap_back_search: "
 390                                         "got SEARCH_REFERENCE "
 391                                         "with no referrals\n",
 392                                         op->o_log_prefix, 0, 0 );
 393                         }
 394
 395                         /* cleanup */
 396                         if ( references ) {
 397                                 ber_memvfree( (void **)references );
 398                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 399                                 rs->sr_ref = NULL;
 400                         }
 401
 402                         if ( rs->sr_ctrls ) {
 403                                 ldap_controls_free( rs->sr_ctrls );
 404                                 rs->sr_ctrls = NULL;
 405                         }
 406
 407                 } else {
 408                         char            **references = NULL, *err = NULL;
 409
 410                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 411                                         &match.bv_val, &err,
 412                                         &references, &rs->sr_ctrls, 1 );
 413                         if ( rc != LDAP_SUCCESS ) {
 414                                 rs->sr_err = rc;
 415                         }
 416                         rs->sr_err = slap_map_api2result( rs );
 417                         if ( err ) {
 418                                 rs->sr_text = err;
 419                                 freetext = 1;
 420                         }
 421
 422                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 423                                 int     cnt;
 424
 425                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 426                                         /* FIXME: error */
 427                                         Debug( LDAP_DEBUG_ANY,
 428                                                 "%s ldap_back_search: "
 429                                                 "got referrals with %d\n",
 430                                                 op->o_log_prefix,
 431                                                 rs->sr_err, 0 );
 432                                         rs->sr_err = LDAP_REFERRAL;
 433                                 }
 434
 435                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 436                                         /* NO OP */ ;
 437
 438                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 439                                         op->o_tmpmemctx );
 440
 441                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 442                                         /* duplicating ...*/
 443                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 444                                 }
 445                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 446                         }
 447
 448                         if ( match.bv_val != NULL ) {
 449                                 match.bv_len = strlen( match.bv_val );
 450                         }
 451
 452                         /* cleanup */
 453                         if ( references ) {
 454                                 ber_memvfree( (void **)references );
 455                         }
 456
 457                         rc = 0;
 458                         break;
 459                 }
 460
 461                 /* if needed, restore timeout */
 462                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 463                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 464                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 465                                 tv.tv_usec = 0;
 466                         }
 467                 }
 468         }
 469
 470         if ( rc == -1 && dont_retry == 0 ) {
 471                 if ( do_retry ) {
 472                         do_retry = 0;
 473                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 474                                 goto retry;
 475                         }
 476                 }
 477                 rs->sr_err = LDAP_SERVER_DOWN;
 478                 rs->sr_err = slap_map_api2result( rs );
 479                 goto finish;
 480         }
 481
 482         /*
 483          * Rewrite the matched portion of the search base, if required
 484          */
 485         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 486                 struct berval   pmatch;
 487
 488                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 489                         rs->sr_matched = pmatch.bv_val;
 490                         LDAP_FREE( match.bv_val );
 491
 492                 } else {
 493                         rs->sr_matched = match.bv_val;
 494                 }
 495         }
 496
 497         if ( rs->sr_v2ref ) {
 498                 rs->sr_err = LDAP_REFERRAL;
 499         }
 500
 501 finish:;
 502         if ( LDAP_BACK_QUARANTINE( li ) ) {
 503                 ldap_back_quarantine( op, rs );
 504         }
 505
 506 #if 0
 507         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 508         if ( rc != SLAPD_ABANDON )
 509 #endif
 510         {
 511                 send_ldap_result( op, rs );
 512         }
 513
 514         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 515
 516         if ( rs->sr_ctrls ) {
 517                 ldap_controls_free( rs->sr_ctrls );
 518                 rs->sr_ctrls = NULL;
 519         }
 520
 521         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 522                 if ( rs->sr_matched != match.bv_val ) {
 523                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 524
 525                 } else {
 526                         LDAP_FREE( match.bv_val );
 527                 }
 528                 rs->sr_matched = save_matched;
 529         }
 530
 531         if ( free_filter ) {
 532                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 533         }
 534
 535         if ( rs->sr_text ) {
 536                 if ( freetext ) {
 537                         LDAP_FREE( (char *)rs->sr_text );
 538                 }
 539                 rs->sr_text = NULL;
 540         }
 541
 542         if ( rs->sr_ref ) {
 543                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 544                 rs->sr_ref = NULL;
 545         }
 546
 547         if ( attrs ) {
 548                 ch_free( attrs );
 549         }
 550
 551         if ( lc != NULL ) {
 552                 ldap_back_release_conn( li, lc );
 553         }
 554
 555         return rs->sr_err;
 556 }
 557
 558 static int
 559 ldap_build_entry(
 560                 Operation       *op,
 561                 LDAPMessage     *e,
 562                 Entry           *ent,
 563                 struct berval   *bdn )
 564 {
 565         struct berval   a;
 566         BerElement      ber = *e->lm_ber;
 567         Attribute       *attr, **attrp;
 568         const char      *text;
 569         int             last;
 570
 571         /* safe assumptions ... */
 572         assert( ent != NULL );
 573         BER_BVZERO( &ent->e_bv );
 574
 575         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 576                 return LDAP_DECODING_ERROR;
 577         }
 578
 579         /*
 580          * Note: this may fail if the target host(s) schema differs
 581          * from the one known to the meta, and a DN with unknown
 582          * attributes is returned.
 583          *
 584          * FIXME: should we log anything, or delegate to dnNormalize?
 585          */
 586         /* Note: if the distinguished values or the naming attributes
 587          * change, should we massage them as well?
 588          */
 589         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 590                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 591         {
 592                 return LDAP_INVALID_DN_SYNTAX;
 593         }
 594
 595         attrp = &ent->e_attrs;
 596
 597         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 598                 int                             i;
 599                 slap_syntax_validate_func       *validate;
 600                 slap_syntax_transform_func      *pretty;
 601
 602                 attr = attr_alloc( NULL );
 603                 if ( attr == NULL ) {
 604                         continue;
 605                 }
 606                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 607                                 != LDAP_SUCCESS )
 608                 {
 609                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 610                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 611                         {
 612                                 Debug( LDAP_DEBUG_ANY,
 613                                         "%s ldap_build_entry: "
 614                                         "slap_bv2undef_ad(%s): %s\n",
 615                                         op->o_log_prefix, a.bv_val, text );
 616                                 attr_free( attr );
 617                                 continue;
 618                         }
 619                 }
 620
 621                 /* no subschemaSubentry */
 622                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 623                         || attr->a_desc == slap_schema.si_ad_entryDN )
 624                 {
 625
 626                         /*
 627                          * We eat target's subschemaSubentry because
 628                          * a search for this value is likely not
 629                          * to resolve to the appropriate backend;
 630                          * later, the local subschemaSubentry is
 631                          * added.
 632                          *
 633                          * We also eat entryDN because the frontend
 634                          * will reattach it without checking if already
 635                          * present...
 636                          */
 637                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 638
 639                         attr_free( attr );
 640                         continue;
 641                 }
 642
 643                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 644                                 || attr->a_vals == NULL )
 645                 {
 646                         /*
 647                          * Note: attr->a_vals can be null when using
 648                          * values result filter
 649                          */
 650                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 651                         last = 0;
 652
 653                 } else {
 654                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 655                                 /* just count vals */ ;
 656                 }
 657
 658                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 659                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 660
 661                 if ( !validate && !pretty ) {
 662                         attr->a_nvals = NULL;
 663                         attr_free( attr );
 664                         goto next_attr;
 665                 }
 666
 667                 for ( i = 0; i < last; i++ ) {
 668                         struct berval   pval;
 669                         int             rc;
 670
 671                         if ( pretty ) {
 672                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 673                                         &attr->a_vals[i], &pval, NULL );
 674
 675                         } else {
 676                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 677                                         &attr->a_vals[i] );
 678                         }
 679
 680                         if ( rc != LDAP_SUCCESS ) {
 681                                 /* check if, by chance, it's an undefined objectClass */
 682                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 683                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 684                                 {
 685                                         ber_dupbv( &pval, &attr->a_vals[i] );
 686
 687                                 } else {
 688                                         attr->a_nvals = NULL;
 689                                         attr_free( attr );
 690                                         goto next_attr;
 691                                 }
 692                         }
 693
 694                         if ( pretty ) {
 695                                 LBER_FREE( attr->a_vals[i].bv_val );
 696                                 attr->a_vals[i] = pval;
 697                         }
 698                 }
 699
 700                 if ( last && attr->a_desc->ad_type->sat_equality &&
 701                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 702                 {
 703                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 704                         for ( i = 0; i < last; i++ ) {
 705                                 int             rc;
 706
 707                                 /*
 708                                  * check that each value is valid per syntax
 709                                  * and pretty if appropriate
 710                                  */
 711                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 712                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 713                                         attr->a_desc->ad_type->sat_syntax,
 714                                         attr->a_desc->ad_type->sat_equality,
 715                                         &attr->a_vals[i], &attr->a_nvals[i],
 716                                         NULL );
 717
 718                                 if ( rc != LDAP_SUCCESS ) {
 719                                         BER_BVZERO( &attr->a_nvals[i] );
 720                                         attr_free( attr );
 721                                         goto next_attr;
 722                                 }
 723                         }
 724                         BER_BVZERO( &attr->a_nvals[i] );
 725
 726                 } else {
 727                         attr->a_nvals = attr->a_vals;
 728                 }
 729                 *attrp = attr;
 730                 attrp = &attr->a_next;
 731
 732 next_attr:;
 733         }
 734
 735         return LDAP_SUCCESS;
 736 }
 737
 738 /* return 0 IFF we can retrieve the entry with ndn
 739  */
 740 int
 741 ldap_back_entry_get(
 742                 Operation               *op,
 743                 struct berval           *ndn,
 744                 ObjectClass             *oc,
 745                 AttributeDescription    *at,
 746                 int                     rw,
 747                 Entry                   **ent )
 748 {
 749         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 750
 751         ldapconn_t      *lc = NULL;
 752         int             rc = 1,
 753                         do_not_cache;
 754         struct berval   bdn;
 755         LDAPMessage     *result = NULL,
 756                         *e = NULL;
 757         char            *attr[3], **attrp = NULL;
 758         char            *filter = NULL;
 759         SlapReply       rs;
 760         int             do_retry = 1;
 761         LDAPControl     **ctrls = NULL;
 762
 763         *ent = NULL;
 764
 765         /* Tell getconn this is a privileged op */
 766         do_not_cache = op->o_do_not_cache;
 767         op->o_do_not_cache = 1;
 768         if ( !ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 769                 op->o_do_not_cache = do_not_cache;
 770                 return rs.sr_err;
 771         }
 772         op->o_do_not_cache = do_not_cache;
 773
 774         if ( at ) {
 775                 attrp = attr;
 776                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 777                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 778                         attr[1] = at->ad_cname.bv_val;
 779                         attr[2] = NULL;
 780
 781                 } else {
 782                         attr[0] = at->ad_cname.bv_val;
 783                         attr[1] = NULL;
 784                 }
 785         }
 786
 787         if ( oc ) {
 788                 char    *ptr;
 789
 790                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 791                                 + oc->soc_cname.bv_len + 1 );
 792                 ptr = lutil_strcopy( filter, "(objectclass=" );
 793                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 794                 *ptr++ = ')';
 795                 *ptr++ = '\0';
 796         }
 797
 798 retry:
 799         ctrls = op->o_ctrls;
 800         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 801                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 802         if ( rc != LDAP_SUCCESS ) {
 803                 goto cleanup;
 804         }
 805
 806         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 807                                 attrp, 0, ctrls, NULL,
 808                                 NULL, LDAP_NO_LIMIT, &result );
 809         if ( rc != LDAP_SUCCESS ) {
 810                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 811                         do_retry = 0;
 812                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 813                                 /* if the identity changed, there might be need to re-authz */
 814                                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 815                                 goto retry;
 816                         }
 817                 }
 818                 goto cleanup;
 819         }
 820
 821         e = ldap_first_entry( lc->lc_ld, result );
 822         if ( e == NULL ) {
 823                 /* the entry exists, but it doesn't match the filter? */
 824                 goto cleanup;
 825         }
 826
 827         *ent = entry_alloc();
 828         if ( *ent == NULL ) {
 829                 rc = LDAP_NO_MEMORY;
 830                 goto cleanup;
 831         }
 832
 833         rc = ldap_build_entry( op, e, *ent, &bdn );
 834
 835         if ( rc != LDAP_SUCCESS ) {
 836                 entry_free( *ent );
 837                 *ent = NULL;
 838         }
 839
 840 cleanup:
 841         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 842
 843         if ( result ) {
 844                 ldap_msgfree( result );
 845         }
 846
 847         if ( filter ) {
 848                 ch_free( filter );
 849         }
 850
 851         if ( lc != NULL ) {
 852                 ldap_back_release_conn( li, lc );
 853         }
 854
 855         return rc;
 856 }
 857