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, op, rs, &ctrls );
 207         if ( rc != LDAP_SUCCESS ) {
 208                 goto finish;
 209         }
 210
 211         /* deal with <draft-zeilenga-ldap-t-f> filters */
 212         filter = op->ors_filterstr;
 213 retry:
 214         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 215                         op->ors_scope, filter.bv_val,
 216                         attrs, op->ors_attrsonly, ctrls, NULL,
 217                         tv.tv_sec ? &tv : NULL,
 218                         op->ors_slimit, &msgid );
 219
 220         if ( rs->sr_err != LDAP_SUCCESS ) {
 221                 switch ( rs->sr_err ) {
 222                 case LDAP_SERVER_DOWN:
 223                         if ( do_retry ) {
 224                                 do_retry = 0;
 225                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 226                                         goto retry;
 227                                 }
 228                         }
 229
 230                         if ( lc == NULL ) {
 231                                 /* reset by ldap_back_retry ... */
 232                                 rs->sr_err = slap_map_api2result( rs );
 233
 234                         } else {
 235                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 236                         }
 237
 238                         goto finish;
 239
 240                 case LDAP_FILTER_ERROR:
 241                         if ( ldap_back_munge_filter( op, &filter ) ) {
 242                                 goto retry;
 243                         }
 244
 245                         /* invalid filters return success with no data */
 246                         rs->sr_err = LDAP_SUCCESS;
 247                         rs->sr_text = NULL;
 248                         goto finish;
 249
 250                 default:
 251                         rs->sr_err = slap_map_api2result( rs );
 252                         rs->sr_text = NULL;
 253                         goto finish;
 254                 }
 255         }
 256
 257         /* We pull apart the ber result, stuff it into a slapd entry, and
 258          * let send_search_entry stuff it back into ber format. Slow & ugly,
 259          * but this is necessary for version matching, and for ACL processing.
 260          */
 261
 262         for ( rc = 0; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 263         {
 264                 /* check for abandon */
 265                 if ( op->o_abandon ) {
 266                         if ( rc > 0 ) {
 267                                 ldap_msgfree( res );
 268                         }
 269                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 270                         rc = SLAPD_ABANDON;
 271                         goto finish;
 272                 }
 273
 274                 if ( rc == 0 ) {
 275                         LDAP_BACK_TV_SET( &tv );
 276                         ldap_pvt_thread_yield();
 277
 278                         /* check time limit */
 279                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 280                                         && slap_get_time() > stoptime )
 281                         {
 282                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 283                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 284                                 goto finish;
 285                         }
 286                         continue;
 287
 288                 } else {
 289                         /* don't retry any more */
 290                         dont_retry = 1;
 291                 }
 292
 293
 294                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 295                         Entry           ent = { 0 };
 296                         struct berval   bdn = BER_BVNULL;
 297
 298                         do_retry = 0;
 299
 300                         e = ldap_first_entry( lc->lc_ld, res );
 301                         rc = ldap_build_entry( op, e, &ent, &bdn );
 302                         if ( rc == LDAP_SUCCESS ) {
 303                                 rs->sr_entry = &ent;
 304                                 rs->sr_attrs = op->ors_attrs;
 305                                 rs->sr_operational_attrs = NULL;
 306                                 rs->sr_flags = 0;
 307                                 rs->sr_err = LDAP_SUCCESS;
 308                                 rc = rs->sr_err = send_search_entry( op, rs );
 309                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 310                                         assert( ent.e_name.bv_val != bdn.bv_val );
 311                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 312                                         BER_BVZERO( &ent.e_name );
 313                                 }
 314                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 315                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 316                                         BER_BVZERO( &ent.e_nname );
 317                                 }
 318                                 entry_clean( &ent );
 319                         }
 320                         ldap_msgfree( res );
 321                         if ( rc != LDAP_SUCCESS ) {
 322                                 if ( rc == LDAP_UNAVAILABLE ) {
 323                                         rc = rs->sr_err = LDAP_OTHER;
 324                                 } else {
 325                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 326                                 }
 327                                 goto finish;
 328                         }
 329
 330                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 331                         char            **references = NULL;
 332
 333                         do_retry = 0;
 334                         rc = ldap_parse_reference( lc->lc_ld, res,
 335                                         &references, &rs->sr_ctrls, 1 );
 336
 337                         if ( rc != LDAP_SUCCESS ) {
 338                                 continue;
 339                         }
 340
 341                         /* FIXME: there MUST be at least one */
 342                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 343                                 int             cnt;
 344
 345                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 346                                         /* NO OP */ ;
 347
 348                                 /* FIXME: there MUST be at least one */
 349                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 350                                         op->o_tmpmemctx );
 351
 352                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 353                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 354                                 }
 355                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 356
 357                                 /* ignore return value by now */
 358                                 ( void )send_search_reference( op, rs );
 359
 360                         } else {
 361                                 Debug( LDAP_DEBUG_ANY,
 362                                         "%s ldap_back_search: "
 363                                         "got SEARCH_REFERENCE "
 364                                         "with no referrals\n",
 365                                         op->o_log_prefix, 0, 0 );
 366                         }
 367
 368                         /* cleanup */
 369                         if ( references ) {
 370                                 ber_memvfree( (void **)references );
 371                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 372                                 rs->sr_ref = NULL;
 373                         }
 374
 375                         if ( rs->sr_ctrls ) {
 376                                 ldap_controls_free( rs->sr_ctrls );
 377                                 rs->sr_ctrls = NULL;
 378                         }
 379
 380                 } else {
 381                         char            **references = NULL, *err = NULL;
 382
 383                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 384                                         &match.bv_val, &err,
 385                                         &references, &rs->sr_ctrls, 1 );
 386                         if ( rc != LDAP_SUCCESS ) {
 387                                 rs->sr_err = rc;
 388                         }
 389                         rs->sr_err = slap_map_api2result( rs );
 390                         if ( err ) {
 391                                 rs->sr_text = err;
 392                                 freetext = 1;
 393                         }
 394
 395                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 396                                 int     cnt;
 397
 398                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 399                                         /* FIXME: error */
 400                                         Debug( LDAP_DEBUG_ANY,
 401                                                 "%s ldap_back_search: "
 402                                                 "got referrals with %d\n",
 403                                                 op->o_log_prefix,
 404                                                 rs->sr_err, 0 );
 405                                         rs->sr_err = LDAP_REFERRAL;
 406                                 }
 407
 408                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 409                                         /* NO OP */ ;
 410
 411                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 412                                         op->o_tmpmemctx );
 413
 414                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 415                                         /* duplicating ...*/
 416                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 417                                 }
 418                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 419                         }
 420
 421                         if ( match.bv_val != NULL ) {
 422                                 {
 423                                         match.bv_len = strlen( match.bv_val );
 424                                 }
 425                         }
 426
 427                         /* cleanup */
 428                         if ( references ) {
 429                                 ber_memvfree( (void **)references );
 430                         }
 431
 432                         rc = 0;
 433                         break;
 434                 }
 435         }
 436
 437         if ( rc == -1 && dont_retry == 0 ) {
 438                 if ( do_retry ) {
 439                         do_retry = 0;
 440                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 441                                 goto retry;
 442                         }
 443                 }
 444                 rs->sr_err = LDAP_SERVER_DOWN;
 445                 rs->sr_err = slap_map_api2result( rs );
 446                 goto finish;
 447         }
 448
 449         /*
 450          * Rewrite the matched portion of the search base, if required
 451          */
 452         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 453                 struct berval   pmatch;
 454
 455                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 456                         rs->sr_matched = pmatch.bv_val;
 457                         LDAP_FREE( match.bv_val );
 458
 459                 } else {
 460                         rs->sr_matched = match.bv_val;
 461                 }
 462         }
 463
 464         if ( rs->sr_v2ref ) {
 465                 rs->sr_err = LDAP_REFERRAL;
 466         }
 467
 468 finish:;
 469         if ( LDAP_BACK_QUARANTINE( li ) ) {
 470                 ldap_back_quarantine( op, rs, 1 );
 471         }
 472
 473         if ( rc != SLAPD_ABANDON ) {
 474                 send_ldap_result( op, rs );
 475         }
 476
 477         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 478
 479         if ( rs->sr_ctrls ) {
 480                 ldap_controls_free( rs->sr_ctrls );
 481                 rs->sr_ctrls = NULL;
 482         }
 483
 484         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 485                 if ( rs->sr_matched != match.bv_val ) {
 486                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 487
 488                 } else {
 489                         LDAP_FREE( match.bv_val );
 490                 }
 491                 rs->sr_matched = save_matched;
 492         }
 493
 494         if ( !BER_BVISNULL( &filter ) && filter.bv_val != op->ors_filterstr.bv_val ) {
 495                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 496         }
 497
 498         if ( rs->sr_text ) {
 499                 if ( freetext ) {
 500                         LDAP_FREE( (char *)rs->sr_text );
 501                 }
 502                 rs->sr_text = NULL;
 503         }
 504
 505         if ( rs->sr_ref ) {
 506                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 507                 rs->sr_ref = NULL;
 508         }
 509
 510         if ( attrs ) {
 511                 ch_free( attrs );
 512         }
 513
 514         if ( lc != NULL ) {
 515                 ldap_back_release_conn( op, rs, lc );
 516         }
 517
 518         return rs->sr_err;
 519 }
 520
 521 static int
 522 ldap_build_entry(
 523                 Operation       *op,
 524                 LDAPMessage     *e,
 525                 Entry           *ent,
 526                 struct berval   *bdn )
 527 {
 528         struct berval   a;
 529         BerElement      ber = *e->lm_ber;
 530         Attribute       *attr, **attrp;
 531         const char      *text;
 532         int             last;
 533
 534         /* safe assumptions ... */
 535         assert( ent != NULL );
 536         BER_BVZERO( &ent->e_bv );
 537
 538         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 539                 return LDAP_DECODING_ERROR;
 540         }
 541
 542         /*
 543          * Note: this may fail if the target host(s) schema differs
 544          * from the one known to the meta, and a DN with unknown
 545          * attributes is returned.
 546          *
 547          * FIXME: should we log anything, or delegate to dnNormalize?
 548          */
 549         /* Note: if the distinguished values or the naming attributes
 550          * change, should we massage them as well?
 551          */
 552         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 553                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 554         {
 555                 return LDAP_INVALID_DN_SYNTAX;
 556         }
 557
 558         attrp = &ent->e_attrs;
 559
 560         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 561                 int                             i;
 562                 slap_syntax_validate_func       *validate;
 563                 slap_syntax_transform_func      *pretty;
 564
 565                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 566                 if ( attr == NULL ) {
 567                         continue;
 568                 }
 569                 attr->a_flags = 0;
 570                 attr->a_next = 0;
 571                 attr->a_desc = NULL;
 572                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 573                                 != LDAP_SUCCESS )
 574                 {
 575                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 576                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 577                         {
 578                                 Debug( LDAP_DEBUG_ANY,
 579                                         "%s ldap_build_entry: "
 580                                         "slap_bv2undef_ad(%s): %s\n",
 581                                         op->o_log_prefix, a.bv_val, text );
 582                                 ch_free( attr );
 583                                 continue;
 584                         }
 585                 }
 586
 587                 /* no subschemaSubentry */
 588                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 589                         || attr->a_desc == slap_schema.si_ad_entryDN )
 590                 {
 591
 592                         /*
 593                          * We eat target's subschemaSubentry because
 594                          * a search for this value is likely not
 595                          * to resolve to the appropriate backend;
 596                          * later, the local subschemaSubentry is
 597                          * added.
 598                          *
 599                          * We also eat entryDN because the frontend
 600                          * will reattach it without checking if already
 601                          * present...
 602                          */
 603                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 604
 605                         ch_free( attr );
 606                         continue;
 607                 }
 608
 609                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 610                                 || attr->a_vals == NULL )
 611                 {
 612                         /*
 613                          * Note: attr->a_vals can be null when using
 614                          * values result filter
 615                          */
 616                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 617                         last = 0;
 618
 619                 } else {
 620                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 621                                 /* just count vals */ ;
 622                 }
 623
 624                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 625                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 626
 627                 if ( !validate && !pretty ) {
 628                         attr->a_nvals = NULL;
 629                         attr_free( attr );
 630                         goto next_attr;
 631                 }
 632
 633                 for ( i = 0; i < last; i++ ) {
 634                         struct berval   pval;
 635                         int             rc;
 636
 637                         if ( pretty ) {
 638                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 639                                         &attr->a_vals[i], &pval, NULL );
 640
 641                         } else {
 642                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 643                                         &attr->a_vals[i] );
 644                         }
 645
 646                         if ( rc != LDAP_SUCCESS ) {
 647                                 /* check if, by chance, it's an undefined objectClass */
 648                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 649                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 650                                 {
 651                                         ber_dupbv( &pval, &attr->a_vals[i] );
 652
 653                                 } else {
 654                                         attr->a_nvals = NULL;
 655                                         attr_free( attr );
 656                                         goto next_attr;
 657                                 }
 658                         }
 659
 660                         if ( pretty ) {
 661                                 LBER_FREE( attr->a_vals[i].bv_val );
 662                                 attr->a_vals[i] = pval;
 663                         }
 664                 }
 665
 666                 if ( last && attr->a_desc->ad_type->sat_equality &&
 667                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 668                 {
 669                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 670                         for ( i = 0; i < last; i++ ) {
 671                                 int             rc;
 672
 673                                 /*
 674                                  * check that each value is valid per syntax
 675                                  * and pretty if appropriate
 676                                  */
 677                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 678                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 679                                         attr->a_desc->ad_type->sat_syntax,
 680                                         attr->a_desc->ad_type->sat_equality,
 681                                         &attr->a_vals[i], &attr->a_nvals[i],
 682                                         NULL );
 683
 684                                 if ( rc != LDAP_SUCCESS ) {
 685                                         BER_BVZERO( &attr->a_nvals[i] );
 686                                         ch_free( attr );
 687                                         goto next_attr;
 688                                 }
 689                         }
 690                         BER_BVZERO( &attr->a_nvals[i] );
 691
 692                 } else {
 693                         attr->a_nvals = attr->a_vals;
 694                 }
 695                 *attrp = attr;
 696                 attrp = &attr->a_next;
 697
 698 next_attr:;
 699         }
 700
 701         return LDAP_SUCCESS;
 702 }
 703
 704 /* return 0 IFF we can retrieve the entry with ndn
 705  */
 706 int
 707 ldap_back_entry_get(
 708                 Operation               *op,
 709                 struct berval           *ndn,
 710                 ObjectClass             *oc,
 711                 AttributeDescription    *at,
 712                 int                     rw,
 713                 Entry                   **ent
 714 )
 715 {
 716         ldapconn_t      *lc;
 717         int             rc = 1,
 718                         do_not_cache;
 719         struct berval   bdn;
 720         LDAPMessage     *result = NULL,
 721                         *e = NULL;
 722         char            *attr[3], **attrp = NULL;
 723         char            *filter = NULL;
 724         SlapReply       rs;
 725         int             do_retry = 1;
 726         LDAPControl     **ctrls = NULL;
 727
 728         *ent = NULL;
 729
 730         /* Tell getconn this is a privileged op */
 731         do_not_cache = op->o_do_not_cache;
 732         op->o_do_not_cache = 1;
 733         lc = ldap_back_getconn( op, &rs, LDAP_BACK_DONTSEND );
 734         if ( !lc || !ldap_back_dobind( lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 735                 op->o_do_not_cache = do_not_cache;
 736                 return rs.sr_err;
 737         }
 738         op->o_do_not_cache = do_not_cache;
 739
 740         if ( at ) {
 741                 attrp = attr;
 742                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 743                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 744                         attr[1] = at->ad_cname.bv_val;
 745                         attr[2] = NULL;
 746
 747                 } else {
 748                         attr[0] = at->ad_cname.bv_val;
 749                         attr[1] = NULL;
 750                 }
 751         }
 752
 753         if ( oc ) {
 754                 char    *ptr;
 755
 756                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 757                                 + oc->soc_cname.bv_len + 1 );
 758                 ptr = lutil_strcopy( filter, "(objectclass=" );
 759                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 760                 *ptr++ = ')';
 761                 *ptr++ = '\0';
 762         }
 763
 764         ctrls = op->o_ctrls;
 765         rc = ldap_back_proxy_authz_ctrl( lc, op, &rs, &ctrls );
 766         if ( rc != LDAP_SUCCESS ) {
 767                 goto cleanup;
 768         }
 769
 770 retry:
 771         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 772                                 attrp, 0, ctrls, NULL,
 773                                 NULL, LDAP_NO_LIMIT, &result );
 774         if ( rc != LDAP_SUCCESS ) {
 775                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 776                         do_retry = 0;
 777                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 778                                 goto retry;
 779                         }
 780                 }
 781                 goto cleanup;
 782         }
 783
 784         e = ldap_first_entry( lc->lc_ld, result );
 785         if ( e == NULL ) {
 786                 /* the entry exists, but it doesn't match the filter? */
 787                 goto cleanup;
 788         }
 789
 790         *ent = ch_calloc( 1, sizeof( Entry ) );
 791         if ( *ent == NULL ) {
 792                 rc = LDAP_NO_MEMORY;
 793                 goto cleanup;
 794         }
 795
 796         rc = ldap_build_entry( op, e, *ent, &bdn );
 797
 798         if ( rc != LDAP_SUCCESS ) {
 799                 ch_free( *ent );
 800                 *ent = NULL;
 801         }
 802
 803 cleanup:
 804         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 805
 806         if ( result ) {
 807                 ldap_msgfree( result );
 808         }
 809
 810         if ( filter ) {
 811                 ch_free( filter );
 812         }
 813
 814         if ( lc != NULL ) {
 815                 ldap_back_release_conn( op, &rs, lc );
 816         }
 817
 818         return rc;
 819 }
 820