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

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