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 1999-2006 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;
 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             i;
 156         char            **attrs = NULL;
 157         int             freetext = 0;
 158         int             do_retry = 1, dont_retry = 0;
 159         LDAPControl     **ctrls = NULL;
 160         /* FIXME: shouldn't this be null? */
 161         const char      *save_matched = rs->sr_matched;
 162
 163         lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
 164         if ( !lc || !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                                 goto retry;
 244                         }
 245
 246                         /* invalid filters return success with no data */
 247                         rs->sr_err = LDAP_SUCCESS;
 248                         rs->sr_text = NULL;
 249                         goto finish;
 250
 251                 default:
 252                         rs->sr_err = slap_map_api2result( rs );
 253                         rs->sr_text = NULL;
 254                         goto finish;
 255                 }
 256         }
 257
 258         /* We pull apart the ber result, stuff it into a slapd entry, and
 259          * let send_search_entry stuff it back into ber format. Slow & ugly,
 260          * but this is necessary for version matching, and for ACL processing.
 261          */
 262
 263         for ( rc = 0; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 264         {
 265                 /* check for abandon */
 266                 if ( op->o_abandon ) {
 267                         if ( rc > 0 ) {
 268                                 ldap_msgfree( res );
 269                         }
 270                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 271                         rc = SLAPD_ABANDON;
 272                         goto finish;
 273                 }
 274
 275                 if ( rc == 0 ) {
 276                         LDAP_BACK_TV_SET( &tv );
 277                         ldap_pvt_thread_yield();
 278
 279                         /* check time limit */
 280                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 281                                         && slap_get_time() > stoptime )
 282                         {
 283                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 284                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 285                                 goto finish;
 286                         }
 287                         continue;
 288
 289                 } else {
 290                         /* don't retry any more */
 291                         dont_retry = 1;
 292                 }
 293
 294
 295                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 296                         Entry           ent = { 0 };
 297                         struct berval   bdn = BER_BVNULL;
 298
 299                         do_retry = 0;
 300
 301                         e = ldap_first_entry( lc->lc_ld, res );
 302                         rc = ldap_build_entry( op, e, &ent, &bdn );
 303                         if ( rc == LDAP_SUCCESS ) {
 304                                 rs->sr_entry = &ent;
 305                                 rs->sr_attrs = op->ors_attrs;
 306                                 rs->sr_operational_attrs = NULL;
 307                                 rs->sr_flags = 0;
 308                                 rs->sr_err = LDAP_SUCCESS;
 309                                 rc = rs->sr_err = send_search_entry( op, rs );
 310                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 311                                         assert( ent.e_name.bv_val != bdn.bv_val );
 312                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 313                                         BER_BVZERO( &ent.e_name );
 314                                 }
 315                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 316                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 317                                         BER_BVZERO( &ent.e_nname );
 318                                 }
 319                                 entry_clean( &ent );
 320                         }
 321                         ldap_msgfree( res );
 322                         if ( rc != LDAP_SUCCESS ) {
 323                                 if ( rc == LDAP_UNAVAILABLE ) {
 324                                         rc = rs->sr_err = LDAP_OTHER;
 325                                 } else {
 326                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 327                                 }
 328                                 goto finish;
 329                         }
 330
 331                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 332                         char            **references = NULL;
 333
 334                         do_retry = 0;
 335                         rc = ldap_parse_reference( lc->lc_ld, res,
 336                                         &references, &rs->sr_ctrls, 1 );
 337
 338                         if ( rc != LDAP_SUCCESS ) {
 339                                 continue;
 340                         }
 341
 342                         /* FIXME: there MUST be at least one */
 343                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 344                                 int             cnt;
 345
 346                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 347                                         /* NO OP */ ;
 348
 349                                 /* FIXME: there MUST be at least one */
 350                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 351                                         op->o_tmpmemctx );
 352
 353                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 354                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 355                                 }
 356                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 357
 358                                 /* ignore return value by now */
 359                                 ( void )send_search_reference( op, rs );
 360
 361                         } else {
 362                                 Debug( LDAP_DEBUG_ANY,
 363                                         "%s ldap_back_search: "
 364                                         "got SEARCH_REFERENCE "
 365                                         "with no referrals\n",
 366                                         op->o_log_prefix, 0, 0 );
 367                         }
 368
 369                         /* cleanup */
 370                         if ( references ) {
 371                                 ber_memvfree( (void **)references );
 372                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 373                                 rs->sr_ref = NULL;
 374                         }
 375
 376                         if ( rs->sr_ctrls ) {
 377                                 ldap_controls_free( rs->sr_ctrls );
 378                                 rs->sr_ctrls = NULL;
 379                         }
 380
 381                 } else {
 382                         char            **references = NULL, *err = NULL;
 383
 384                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 385                                         &match.bv_val, &err,
 386                                         &references, &rs->sr_ctrls, 1 );
 387                         if ( rc != LDAP_SUCCESS ) {
 388                                 rs->sr_err = rc;
 389                         }
 390                         rs->sr_err = slap_map_api2result( rs );
 391                         if ( err ) {
 392                                 rs->sr_text = err;
 393                                 freetext = 1;
 394                         }
 395
 396                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 397                                 int     cnt;
 398
 399                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 400                                         /* FIXME: error */
 401                                         Debug( LDAP_DEBUG_ANY,
 402                                                 "%s ldap_back_search: "
 403                                                 "got referrals with %d\n",
 404                                                 op->o_log_prefix,
 405                                                 rs->sr_err, 0 );
 406                                         rs->sr_err = LDAP_REFERRAL;
 407                                 }
 408
 409                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 410                                         /* NO OP */ ;
 411
 412                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 413                                         op->o_tmpmemctx );
 414
 415                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 416                                         /* duplicating ...*/
 417                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 418                                 }
 419                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 420                         }
 421
 422                         if ( match.bv_val != NULL ) {
 423                                 match.bv_len = strlen( match.bv_val );
 424                         }
 425
 426                         /* cleanup */
 427                         if ( references ) {
 428                                 ber_memvfree( (void **)references );
 429                         }
 430
 431                         rc = 0;
 432                         break;
 433                 }
 434         }
 435
 436         if ( rc == -1 && dont_retry == 0 ) {
 437                 if ( do_retry ) {
 438                         do_retry = 0;
 439                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 440                                 goto retry;
 441                         }
 442                 }
 443                 rs->sr_err = LDAP_SERVER_DOWN;
 444                 rs->sr_err = slap_map_api2result( rs );
 445                 goto finish;
 446         }
 447
 448         /*
 449          * Rewrite the matched portion of the search base, if required
 450          */
 451         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 452                 struct berval   pmatch;
 453
 454                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 455                         rs->sr_matched = pmatch.bv_val;
 456                         LDAP_FREE( match.bv_val );
 457
 458                 } else {
 459                         rs->sr_matched = match.bv_val;
 460                 }
 461         }
 462
 463         if ( rs->sr_v2ref ) {
 464                 rs->sr_err = LDAP_REFERRAL;
 465         }
 466
 467 finish:;
 468         if ( LDAP_BACK_QUARANTINE( li ) ) {
 469                 ldap_back_quarantine( op, rs );
 470         }
 471
 472 #if 0
 473         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 474         if ( rc != SLAPD_ABANDON )
 475 #endif
 476         {
 477                 send_ldap_result( op, rs );
 478         }
 479
 480         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 481
 482         if ( rs->sr_ctrls ) {
 483                 ldap_controls_free( rs->sr_ctrls );
 484                 rs->sr_ctrls = NULL;
 485         }
 486
 487         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 488                 if ( rs->sr_matched != match.bv_val ) {
 489                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 490
 491                 } else {
 492                         LDAP_FREE( match.bv_val );
 493                 }
 494                 rs->sr_matched = save_matched;
 495         }
 496
 497         if ( !BER_BVISNULL( &filter ) && filter.bv_val != op->ors_filterstr.bv_val ) {
 498                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 499         }
 500
 501         if ( rs->sr_text ) {
 502                 if ( freetext ) {
 503                         LDAP_FREE( (char *)rs->sr_text );
 504                 }
 505                 rs->sr_text = NULL;
 506         }
 507
 508         if ( rs->sr_ref ) {
 509                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 510                 rs->sr_ref = NULL;
 511         }
 512
 513         if ( attrs ) {
 514                 ch_free( attrs );
 515         }
 516
 517         if ( lc != NULL ) {
 518                 ldap_back_release_conn( op, rs, lc );
 519         }
 520
 521         return rs->sr_err;
 522 }
 523
 524 static int
 525 ldap_build_entry(
 526                 Operation       *op,
 527                 LDAPMessage     *e,
 528                 Entry           *ent,
 529                 struct berval   *bdn )
 530 {
 531         struct berval   a;
 532         BerElement      ber = *e->lm_ber;
 533         Attribute       *attr, **attrp;
 534         const char      *text;
 535         int             last;
 536
 537         /* safe assumptions ... */
 538         assert( ent != NULL );
 539         BER_BVZERO( &ent->e_bv );
 540
 541         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 542                 return LDAP_DECODING_ERROR;
 543         }
 544
 545         /*
 546          * Note: this may fail if the target host(s) schema differs
 547          * from the one known to the meta, and a DN with unknown
 548          * attributes is returned.
 549          *
 550          * FIXME: should we log anything, or delegate to dnNormalize?
 551          */
 552         /* Note: if the distinguished values or the naming attributes
 553          * change, should we massage them as well?
 554          */
 555         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 556                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 557         {
 558                 return LDAP_INVALID_DN_SYNTAX;
 559         }
 560
 561         attrp = &ent->e_attrs;
 562
 563         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 564                 int                             i;
 565                 slap_syntax_validate_func       *validate;
 566                 slap_syntax_transform_func      *pretty;
 567
 568                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 569                 if ( attr == NULL ) {
 570                         continue;
 571                 }
 572                 attr->a_flags = 0;
 573                 attr->a_next = 0;
 574                 attr->a_desc = NULL;
 575                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 576                                 != LDAP_SUCCESS )
 577                 {
 578                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 579                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 580                         {
 581                                 Debug( LDAP_DEBUG_ANY,
 582                                         "%s ldap_build_entry: "
 583                                         "slap_bv2undef_ad(%s): %s\n",
 584                                         op->o_log_prefix, a.bv_val, text );
 585                                 ch_free( attr );
 586                                 continue;
 587                         }
 588                 }
 589
 590                 /* no subschemaSubentry */
 591                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 592                         || attr->a_desc == slap_schema.si_ad_entryDN )
 593                 {
 594
 595                         /*
 596                          * We eat target's subschemaSubentry because
 597                          * a search for this value is likely not
 598                          * to resolve to the appropriate backend;
 599                          * later, the local subschemaSubentry is
 600                          * added.
 601                          *
 602                          * We also eat entryDN because the frontend
 603                          * will reattach it without checking if already
 604                          * present...
 605                          */
 606                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 607
 608                         ch_free( attr );
 609                         continue;
 610                 }
 611
 612                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 613                                 || attr->a_vals == NULL )
 614                 {
 615                         /*
 616                          * Note: attr->a_vals can be null when using
 617                          * values result filter
 618                          */
 619                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 620                         last = 0;
 621
 622                 } else {
 623                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 624                                 /* just count vals */ ;
 625                 }
 626
 627                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 628                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 629
 630                 if ( !validate && !pretty ) {
 631                         attr->a_nvals = NULL;
 632                         attr_free( attr );
 633                         goto next_attr;
 634                 }
 635
 636                 for ( i = 0; i < last; i++ ) {
 637                         struct berval   pval;
 638                         int             rc;
 639
 640                         if ( pretty ) {
 641                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 642                                         &attr->a_vals[i], &pval, NULL );
 643
 644                         } else {
 645                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 646                                         &attr->a_vals[i] );
 647                         }
 648
 649                         if ( rc != LDAP_SUCCESS ) {
 650                                 /* check if, by chance, it's an undefined objectClass */
 651                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 652                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 653                                 {
 654                                         ber_dupbv( &pval, &attr->a_vals[i] );
 655
 656                                 } else {
 657                                         attr->a_nvals = NULL;
 658                                         attr_free( attr );
 659                                         goto next_attr;
 660                                 }
 661                         }
 662
 663                         if ( pretty ) {
 664                                 LBER_FREE( attr->a_vals[i].bv_val );
 665                                 attr->a_vals[i] = pval;
 666                         }
 667                 }
 668
 669                 if ( last && attr->a_desc->ad_type->sat_equality &&
 670                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 671                 {
 672                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 673                         for ( i = 0; i < last; i++ ) {
 674                                 int             rc;
 675
 676                                 /*
 677                                  * check that each value is valid per syntax
 678                                  * and pretty if appropriate
 679                                  */
 680                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 681                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 682                                         attr->a_desc->ad_type->sat_syntax,
 683                                         attr->a_desc->ad_type->sat_equality,
 684                                         &attr->a_vals[i], &attr->a_nvals[i],
 685                                         NULL );
 686
 687                                 if ( rc != LDAP_SUCCESS ) {
 688                                         BER_BVZERO( &attr->a_nvals[i] );
 689                                         ch_free( attr );
 690                                         goto next_attr;
 691                                 }
 692                         }
 693                         BER_BVZERO( &attr->a_nvals[i] );
 694
 695                 } else {
 696                         attr->a_nvals = attr->a_vals;
 697                 }
 698                 *attrp = attr;
 699                 attrp = &attr->a_next;
 700
 701 next_attr:;
 702         }
 703
 704         return LDAP_SUCCESS;
 705 }
 706
 707 /* return 0 IFF we can retrieve the entry with ndn
 708  */
 709 int
 710 ldap_back_entry_get(
 711                 Operation               *op,
 712                 struct berval           *ndn,
 713                 ObjectClass             *oc,
 714                 AttributeDescription    *at,
 715                 int                     rw,
 716                 Entry                   **ent )
 717 {
 718         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 719
 720         ldapconn_t      *lc;
 721         int             rc = 1,
 722                         do_not_cache;
 723         struct berval   bdn;
 724         LDAPMessage     *result = NULL,
 725                         *e = NULL;
 726         char            *attr[3], **attrp = NULL;
 727         char            *filter = NULL;
 728         SlapReply       rs;
 729         int             do_retry = 1;
 730         LDAPControl     **ctrls = NULL;
 731
 732         *ent = NULL;
 733
 734         /* Tell getconn this is a privileged op */
 735         do_not_cache = op->o_do_not_cache;
 736         op->o_do_not_cache = 1;
 737         lc = ldap_back_getconn( op, &rs, LDAP_BACK_DONTSEND );
 738         if ( !lc || !ldap_back_dobind( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 739                 op->o_do_not_cache = do_not_cache;
 740                 return rs.sr_err;
 741         }
 742         op->o_do_not_cache = do_not_cache;
 743
 744         if ( at ) {
 745                 attrp = attr;
 746                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 747                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 748                         attr[1] = at->ad_cname.bv_val;
 749                         attr[2] = NULL;
 750
 751                 } else {
 752                         attr[0] = at->ad_cname.bv_val;
 753                         attr[1] = NULL;
 754                 }
 755         }
 756
 757         if ( oc ) {
 758                 char    *ptr;
 759
 760                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 761                                 + oc->soc_cname.bv_len + 1 );
 762                 ptr = lutil_strcopy( filter, "(objectclass=" );
 763                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 764                 *ptr++ = ')';
 765                 *ptr++ = '\0';
 766         }
 767
 768         ctrls = op->o_ctrls;
 769         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 770                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 771         if ( rc != LDAP_SUCCESS ) {
 772                 goto cleanup;
 773         }
 774
 775 retry:
 776         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 777                                 attrp, 0, ctrls, NULL,
 778                                 NULL, LDAP_NO_LIMIT, &result );
 779         if ( rc != LDAP_SUCCESS ) {
 780                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 781                         do_retry = 0;
 782                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 783                                 goto retry;
 784                         }
 785                 }
 786                 goto cleanup;
 787         }
 788
 789         e = ldap_first_entry( lc->lc_ld, result );
 790         if ( e == NULL ) {
 791                 /* the entry exists, but it doesn't match the filter? */
 792                 goto cleanup;
 793         }
 794
 795         *ent = ch_calloc( 1, sizeof( Entry ) );
 796         if ( *ent == NULL ) {
 797                 rc = LDAP_NO_MEMORY;
 798                 goto cleanup;
 799         }
 800
 801         rc = ldap_build_entry( op, e, *ent, &bdn );
 802
 803         if ( rc != LDAP_SUCCESS ) {
 804                 ch_free( *ent );
 805                 *ent = NULL;
 806         }
 807
 808 cleanup:
 809         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 810
 811         if ( result ) {
 812                 ldap_msgfree( result );
 813         }
 814
 815         if ( filter ) {
 816                 ch_free( filter );
 817         }
 818
 819         if ( lc != NULL ) {
 820                 ldap_back_release_conn( op, &rs, lc );
 821         }
 822
 823         return rc;
 824 }
 825