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 1999-2005 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         struct ldapinfo *li = (struct ldapinfo *) 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 ( li->flags & LDAP_BACK_F_SUPPORT_T_F ) {
  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 ( li->flags & LDAP_BACK_F_SUPPORT_T_F ) {
  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         struct ldapconn *lc;
 145         struct timeval  tv;
 146         time_t          stoptime;
 147         LDAPMessage     *res,
 148                         *e;
 149         int             rc = 0,
 150                         msgid;
 151         struct berval   match = BER_BVNULL,
 152                         filter = BER_BVNULL;
 153         int             i;
 154         char            **attrs = NULL;
 155         int             freetext = 0;
 156         int             do_retry = 1;
 157         LDAPControl     **ctrls = NULL;
 158
 159         lc = ldap_back_getconn( op, rs, LDAP_BACK_SENDERR );
 160         if ( !lc || !ldap_back_dobind( lc, op, rs, LDAP_BACK_SENDERR ) ) {
 161                 return rs->sr_err;
 162         }
 163
 164         /*
 165          * FIXME: in case of values return filter, we might want
 166          * to map attrs and maybe rewrite value
 167          */
 168
 169         /* should we check return values? */
 170         if ( op->ors_deref != -1 ) {
 171                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 172                                 (void *)&op->ors_deref );
 173         }
 174
 175         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 176                 tv.tv_sec = op->ors_tlimit;
 177                 tv.tv_usec = 0;
 178                 stoptime = op->o_time + op->ors_tlimit;
 179
 180         } else {
 181                 LDAP_BACK_TV_SET( &tv );
 182         }
 183
 184         if ( op->ors_attrs ) {
 185                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 186                         /* just count attrs */ ;
 187
 188                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 189                 if ( attrs == NULL ) {
 190                         rs->sr_err = LDAP_NO_MEMORY;
 191                         rc = -1;
 192                         goto finish;
 193                 }
 194
 195                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 196                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 197                 }
 198                 attrs[ i ] = NULL;
 199         }
 200
 201         ctrls = op->o_ctrls;
 202         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 203         if ( rc != LDAP_SUCCESS ) {
 204                 goto finish;
 205         }
 206
 207         /* deal with <draft-zeilenga-ldap-t-f> filters */
 208         filter = op->ors_filterstr;
 209 retry:
 210         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_ndn.bv_val,
 211                         op->ors_scope, filter.bv_val,
 212                         attrs, op->ors_attrsonly, ctrls, NULL,
 213                         tv.tv_sec ? &tv : NULL,
 214                         op->ors_slimit, &msgid );
 215
 216         if ( rs->sr_err != LDAP_SUCCESS ) {
 217 fail:;
 218                 switch ( rs->sr_err ) {
 219                 case LDAP_SERVER_DOWN:
 220                         if ( do_retry ) {
 221                                 do_retry = 0;
 222                                 if ( ldap_back_retry( lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 223                                         goto retry;
 224                                 }
 225                         }
 226                         rc = ldap_back_op_result( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 227                         ldap_back_freeconn( op, lc );
 228                         lc = NULL;
 229                         goto finish;
 230
 231                 case LDAP_FILTER_ERROR:
 232                         if ( ldap_back_munge_filter( op, &filter ) ) {
 233                                 goto retry;
 234                         }
 235
 236                         /* invalid filters return success with no data */
 237                         rs->sr_err = LDAP_SUCCESS;
 238                         rs->sr_text = NULL;
 239                         goto finish;
 240
 241                 default:
 242                         rs->sr_err = slap_map_api2result( rs );
 243                         rs->sr_text = NULL;
 244                         goto finish;
 245                 }
 246         }
 247
 248         /* We pull apart the ber result, stuff it into a slapd entry, and
 249          * let send_search_entry stuff it back into ber format. Slow & ugly,
 250          * but this is necessary for version matching, and for ACL processing.
 251          */
 252
 253         for ( rc = 0; rc != -1; rc = ldap_result( lc->lc_ld, msgid, 0, &tv, &res ) )
 254         {
 255                 /* check for abandon */
 256                 if ( op->o_abandon ) {
 257                         if ( rc > 0 ) {
 258                                 ldap_msgfree( res );
 259                         }
 260                         ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
 261                         rc = SLAPD_ABANDON;
 262                         goto finish;
 263                 }
 264
 265                 if ( rc == 0 ) {
 266                         LDAP_BACK_TV_SET( &tv );
 267                         ldap_pvt_thread_yield();
 268
 269                         /* check time limit */
 270                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 271                                         && slap_get_time() > stoptime )
 272                         {
 273                                 ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
 274                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 275                                 goto finish;
 276                         }
 277
 278                 } else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 279                         Entry           ent = { 0 };
 280                         struct berval   bdn = BER_BVNULL;
 281                         int             abort = 0;
 282
 283                         do_retry = 0;
 284
 285                         e = ldap_first_entry( lc->lc_ld, res );
 286                         rc = ldap_build_entry( op, e, &ent, &bdn );
 287                         if ( rc == LDAP_SUCCESS ) {
 288                                 rs->sr_entry = &ent;
 289                                 rs->sr_attrs = op->ors_attrs;
 290                                 rs->sr_operational_attrs = NULL;
 291                                 rs->sr_flags = 0;
 292                                 abort = send_search_entry( op, rs );
 293                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 294                                         assert( ent.e_name.bv_val != bdn.bv_val );
 295                                         free( ent.e_name.bv_val );
 296                                         BER_BVZERO( &ent.e_name );
 297                                 }
 298                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 299                                         free( ent.e_nname.bv_val );
 300                                         BER_BVZERO( &ent.e_nname );
 301                                 }
 302                                 entry_clean( &ent );
 303                         }
 304                         ldap_msgfree( res );
 305                         if ( abort ) {
 306                                 ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
 307                                 goto finish;
 308                         }
 309
 310                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 311                         char            **references = NULL;
 312
 313                         do_retry = 0;
 314                         rc = ldap_parse_reference( lc->lc_ld, res,
 315                                         &references, &rs->sr_ctrls, 1 );
 316
 317                         if ( rc != LDAP_SUCCESS ) {
 318                                 continue;
 319                         }
 320
 321                         /* FIXME: there MUST be at least one */
 322                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 323                                 int             cnt;
 324
 325                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 326                                         /* NO OP */ ;
 327
 328                                 /* FIXME: there MUST be at least one */
 329                                 rs->sr_ref = ch_malloc( ( cnt + 1 ) * sizeof( struct berval ) );
 330
 331                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 332                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 333                                 }
 334                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 335
 336                                 /* ignore return value by now */
 337                                 ( void )send_search_reference( op, rs );
 338
 339                         } else {
 340                                 Debug( LDAP_DEBUG_ANY,
 341                                         "%s ldap_back_search: "
 342                                         "got SEARCH_REFERENCE "
 343                                         "with no referrals\n",
 344                                         op->o_log_prefix, 0, 0 );
 345                         }
 346
 347                         /* cleanup */
 348                         if ( references ) {
 349                                 ldap_value_free( references );
 350                                 ch_free( rs->sr_ref );
 351                                 rs->sr_ref = NULL;
 352                         }
 353
 354                         if ( rs->sr_ctrls ) {
 355                                 ldap_controls_free( rs->sr_ctrls );
 356                                 rs->sr_ctrls = NULL;
 357                         }
 358
 359                 } else {
 360                         char            **references = NULL;
 361
 362                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 363                                         &match.bv_val, (char **)&rs->sr_text,
 364                                         &references, &rs->sr_ctrls, 1 );
 365                         freetext = 1;
 366                         if ( rc != LDAP_SUCCESS ) {
 367                                 rs->sr_err = rc;
 368                         }
 369                         rs->sr_err = slap_map_api2result( rs );
 370
 371                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 372                                 int     cnt;
 373
 374                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 375                                         /* FIXME: error */
 376                                         Debug( LDAP_DEBUG_ANY,
 377                                                 "%s ldap_back_search: "
 378                                                 "got referrals with %d\n",
 379                                                 op->o_log_prefix,
 380                                                 rs->sr_err, 0 );
 381                                         rs->sr_err = LDAP_REFERRAL;
 382                                 }
 383
 384                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 385                                         /* NO OP */ ;
 386
 387                                 rs->sr_ref = ch_malloc( ( cnt + 1 ) * sizeof( struct berval ) );
 388
 389                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 390                                         /* duplicating ...*/
 391                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 392                                 }
 393                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 394                         }
 395
 396                         if ( match.bv_val != NULL ) {
 397                                 if ( match.bv_val[ 0 ] == '\0' ) {
 398                                         LDAP_FREE( match.bv_val );
 399                                         BER_BVZERO( &match );
 400                                 } else {
 401                                         match.bv_len = strlen( match.bv_val );
 402                                 }
 403                         }
 404
 405                         /* cleanup */
 406                         if ( references ) {
 407                                 ldap_value_free( references );
 408                         }
 409
 410                         rc = 0;
 411                         break;
 412                 }
 413         }
 414
 415         if ( rc == -1 ) {
 416                 if ( do_retry ) {
 417                         do_retry = 0;
 418                         if ( ldap_back_retry( lc, op, rs, LDAP_BACK_SENDERR ) ) {
 419                                 goto retry;
 420                         }
 421                 }
 422                 rs->sr_err = LDAP_SERVER_DOWN;
 423                 goto fail;
 424         }
 425
 426         /*
 427          * Rewrite the matched portion of the search base, if required
 428          */
 429         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 430                 struct berval   pmatch;
 431
 432                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 433                         rs->sr_matched = pmatch.bv_val;
 434
 435                 } else {
 436                         rs->sr_matched = match.bv_val;
 437                 }
 438         }
 439
 440         if ( rs->sr_v2ref ) {
 441                 rs->sr_err = LDAP_REFERRAL;
 442         }
 443
 444 finish:;
 445         if ( rc != SLAPD_ABANDON ) {
 446                 send_ldap_result( op, rs );
 447         }
 448
 449         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 450
 451         if ( rs->sr_ctrls ) {
 452                 ldap_controls_free( rs->sr_ctrls );
 453                 rs->sr_ctrls = NULL;
 454         }
 455
 456         if ( rs->sr_matched != NULL ) {
 457                 if ( rs->sr_matched != match.bv_val ) {
 458                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 459
 460                 } else {
 461                         LDAP_FREE( match.bv_val );
 462                 }
 463                 rs->sr_matched = NULL;
 464         }
 465
 466         if ( !BER_BVISNULL( &filter ) && filter.bv_val != op->ors_filterstr.bv_val ) {
 467                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 468         }
 469
 470         if ( rs->sr_text ) {
 471                 if ( freetext ) {
 472                         LDAP_FREE( (char *)rs->sr_text );
 473                 }
 474                 rs->sr_text = NULL;
 475         }
 476
 477         if ( rs->sr_ref ) {
 478                 ber_bvarray_free( rs->sr_ref );
 479                 rs->sr_ref = NULL;
 480         }
 481
 482         if ( attrs ) {
 483                 ch_free( attrs );
 484         }
 485
 486         if ( lc != NULL ) {
 487                 ldap_back_release_conn( op, rs, lc );
 488         }
 489
 490         return rs->sr_err;
 491 }
 492
 493 static int
 494 ldap_build_entry(
 495                 Operation       *op,
 496                 LDAPMessage     *e,
 497                 Entry           *ent,
 498                 struct berval   *bdn )
 499 {
 500         struct berval   a;
 501         BerElement      ber = *e->lm_ber;
 502         Attribute       *attr, **attrp;
 503         const char      *text;
 504         int             last;
 505
 506         /* safe assumptions ... */
 507         assert( ent != NULL );
 508         BER_BVZERO( &ent->e_bv );
 509
 510         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 511                 return LDAP_DECODING_ERROR;
 512         }
 513
 514         /*
 515          * Note: this may fail if the target host(s) schema differs
 516          * from the one known to the meta, and a DN with unknown
 517          * attributes is returned.
 518          *
 519          * FIXME: should we log anything, or delegate to dnNormalize?
 520          */
 521         /* Note: if the distinguished values or the naming attributes
 522          * change, should we massage them as well?
 523          */
 524         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 525                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 526         {
 527                 return LDAP_INVALID_DN_SYNTAX;
 528         }
 529
 530         attrp = &ent->e_attrs;
 531
 532         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 533                 int                             i;
 534                 slap_syntax_validate_func       *validate;
 535                 slap_syntax_transform_func      *pretty;
 536
 537                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 538                 if ( attr == NULL ) {
 539                         continue;
 540                 }
 541                 attr->a_flags = 0;
 542                 attr->a_next = 0;
 543                 attr->a_desc = NULL;
 544                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 545                                 != LDAP_SUCCESS )
 546                 {
 547                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 548                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 549                         {
 550                                 Debug( LDAP_DEBUG_ANY,
 551                                         "%s ldap_build_entry: "
 552                                         "slap_bv2undef_ad(%s): %s\n",
 553                                         op->o_log_prefix, a.bv_val, text );
 554                                 ch_free( attr );
 555                                 continue;
 556                         }
 557                 }
 558
 559                 /* no subschemaSubentry */
 560                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 561                         || attr->a_desc == slap_schema.si_ad_entryDN )
 562                 {
 563
 564                         /*
 565                          * We eat target's subschemaSubentry because
 566                          * a search for this value is likely not
 567                          * to resolve to the appropriate backend;
 568                          * later, the local subschemaSubentry is
 569                          * added.
 570                          *
 571                          * We also eat entryDN because the frontend
 572                          * will reattach it without checking if already
 573                          * present...
 574                          */
 575                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 576
 577                         ch_free( attr );
 578                         continue;
 579                 }
 580
 581                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 582                                 || attr->a_vals == NULL )
 583                 {
 584                         /*
 585                          * Note: attr->a_vals can be null when using
 586                          * values result filter
 587                          */
 588                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 589                         last = 0;
 590
 591                 } else {
 592                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 593                                 /* just count vals */ ;
 594                 }
 595
 596                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 597                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 598
 599                 if ( !validate && !pretty ) {
 600                         attr->a_nvals = NULL;
 601                         attr_free( attr );
 602                         goto next_attr;
 603                 }
 604
 605                 for ( i = 0; i < last; i++ ) {
 606                         struct berval   pval;
 607                         int             rc;
 608
 609                         if ( pretty ) {
 610                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 611                                         &attr->a_vals[i], &pval, NULL );
 612
 613                         } else {
 614                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 615                                         &attr->a_vals[i] );
 616                         }
 617
 618                         if ( rc != LDAP_SUCCESS ) {
 619                                 /* check if, by chance, it's an undefined objectClass */
 620                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 621                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 622                                 {
 623                                         ber_dupbv( &pval, &attr->a_vals[i] );
 624
 625                                 } else {
 626                                         attr->a_nvals = NULL;
 627                                         attr_free( attr );
 628                                         goto next_attr;
 629                                 }
 630                         }
 631
 632                         if ( pretty ) {
 633                                 LBER_FREE( attr->a_vals[i].bv_val );
 634                                 attr->a_vals[i] = pval;
 635                         }
 636                 }
 637
 638                 if ( last && attr->a_desc->ad_type->sat_equality &&
 639                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 640                 {
 641                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 642                         for ( i = 0; i < last; i++ ) {
 643                                 int             rc;
 644
 645                                 /*
 646                                  * check that each value is valid per syntax
 647                                  * and pretty if appropriate
 648                                  */
 649                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 650                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 651                                         attr->a_desc->ad_type->sat_syntax,
 652                                         attr->a_desc->ad_type->sat_equality,
 653                                         &attr->a_vals[i], &attr->a_nvals[i],
 654                                         NULL );
 655
 656                                 if ( rc != LDAP_SUCCESS ) {
 657                                         BER_BVZERO( &attr->a_nvals[i] );
 658                                         ch_free( attr );
 659                                         goto next_attr;
 660                                 }
 661                         }
 662                         BER_BVZERO( &attr->a_nvals[i] );
 663
 664                 } else {
 665                         attr->a_nvals = attr->a_vals;
 666                 }
 667                 *attrp = attr;
 668                 attrp = &attr->a_next;
 669
 670 next_attr:;
 671         }
 672
 673         return LDAP_SUCCESS;
 674 }
 675
 676 /* return 0 IFF we can retrieve the entry with ndn
 677  */
 678 int
 679 ldap_back_entry_get(
 680                 Operation               *op,
 681                 struct berval           *ndn,
 682                 ObjectClass             *oc,
 683                 AttributeDescription    *at,
 684                 int                     rw,
 685                 Entry                   **ent
 686 )
 687 {
 688         struct ldapconn *lc;
 689         int             rc = 1,
 690                         do_not_cache;
 691         struct berval   bdn;
 692         LDAPMessage     *result = NULL,
 693                         *e = NULL;
 694         char            *gattr[3];
 695         char            *filter = NULL;
 696         SlapReply       rs;
 697         int             do_retry = 1;
 698         LDAPControl     **ctrls = NULL;
 699
 700         /* Tell getconn this is a privileged op */
 701         do_not_cache = op->o_do_not_cache;
 702         op->o_do_not_cache = 1;
 703         lc = ldap_back_getconn( op, &rs, LDAP_BACK_DONTSEND );
 704         if ( !lc || !ldap_back_dobind( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 705                 op->o_do_not_cache = do_not_cache;
 706                 return rs.sr_err;
 707         }
 708         op->o_do_not_cache = do_not_cache;
 709
 710         if ( at ) {
 711                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 712                         gattr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 713                         gattr[1] = at->ad_cname.bv_val;
 714                         gattr[2] = NULL;
 715
 716                 } else {
 717                         gattr[0] = at->ad_cname.bv_val;
 718                         gattr[1] = NULL;
 719                 }
 720         }
 721
 722         if ( oc ) {
 723                 char    *ptr;
 724
 725                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 726                                 + oc->soc_cname.bv_len + 1 );
 727                 ptr = lutil_strcopy( filter, "(objectclass=" );
 728                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 729                 *ptr++ = ')';
 730                 *ptr++ = '\0';
 731         }
 732
 733         ctrls = op->o_ctrls;
 734         rc = ldap_back_proxy_authz_ctrl( lc, op, &rs, &ctrls );
 735         if ( rc != LDAP_SUCCESS ) {
 736                 goto cleanup;
 737         }
 738
 739 retry:
 740         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 741                                 at ? gattr : NULL, 0, ctrls, NULL,
 742                                 LDAP_NO_LIMIT, LDAP_NO_LIMIT, &result );
 743         if ( rc != LDAP_SUCCESS ) {
 744                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 745                         do_retry = 0;
 746                         if ( ldap_back_retry( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 747                                 goto retry;
 748                         }
 749                 }
 750                 goto cleanup;
 751         }
 752
 753         e = ldap_first_entry( lc->lc_ld, result );
 754         if ( e == NULL ) {
 755                 goto cleanup;
 756         }
 757
 758         *ent = ch_calloc( 1, sizeof( Entry ) );
 759
 760         rc = ldap_build_entry( op, e, *ent, &bdn );
 761
 762         if ( rc != LDAP_SUCCESS ) {
 763                 ch_free( *ent );
 764                 *ent = NULL;
 765         }
 766
 767 cleanup:
 768         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 769
 770         if ( result ) {
 771                 ldap_msgfree( result );
 772         }
 773
 774         if ( filter ) {
 775                 ch_free( filter );
 776         }
 777
 778         if ( lc != NULL ) {
 779                 ldap_back_release_conn( op, &rs, lc );
 780         }
 781
 782         return rc;
 783 }
 784