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

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2007 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn );
  42
  43 /*
  44  * Quick'n'dirty rewrite of filter in case of error, to deal with
  45  * <draft-zeilenga-ldap-t-f>.
  46  */
  47 static int
  48 ldap_back_munge_filter(
  49         Operation       *op,
  50         struct berval   *filter )
  51 {
  52         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  53
  54         char            *ptr;
  55         int             gotit = 0;
  56
  57         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  58                         filter->bv_val, 0, 0 );
  59
  60         for ( ptr = strstr( filter->bv_val, "(?=" );
  61                         ptr;
  62                         ptr = strstr( ptr, "(?=" ) )
  63         {
  64                 static struct berval
  65                         bv_true = BER_BVC( "(?=true)" ),
  66                         bv_false = BER_BVC( "(?=false)" ),
  67                         bv_undefined = BER_BVC( "(?=undefined)" ),
  68                         bv_t = BER_BVC( "(&)" ),
  69                         bv_f = BER_BVC( "(|)" ),
  70                         bv_T = BER_BVC( "(objectClass=*)" ),
  71                         bv_F = BER_BVC( "(!(objectClass=*))" );
  72                 struct berval   *oldbv = NULL,
  73                                 *newbv = NULL,
  74                                 oldfilter = BER_BVNULL;
  75
  76                 if ( strncmp( ptr, bv_true.bv_val, bv_true.bv_len ) == 0 ) {
  77                         oldbv = &bv_true;
  78                         if ( LDAP_BACK_T_F( li ) ) {
  79                                 newbv = &bv_t;
  80
  81                         } else {
  82                                 newbv = &bv_T;
  83                         }
  84
  85                 } else if ( strncmp( ptr, bv_false.bv_val, bv_false.bv_len ) == 0 )
  86                 {
  87                         oldbv = &bv_false;
  88                         if ( LDAP_BACK_T_F( li ) ) {
  89                                 newbv = &bv_f;
  90
  91                         } else {
  92                                 newbv = &bv_F;
  93                         }
  94
  95                 } else if ( strncmp( ptr, bv_undefined.bv_val, bv_undefined.bv_len ) == 0 )
  96                 {
  97                         oldbv = &bv_undefined;
  98                         newbv = &bv_F;
  99
 100                 } else {
 101                         gotit = 0;
 102                         goto done;
 103                 }
 104
 105                 oldfilter = *filter;
 106                 if ( newbv->bv_len > oldbv->bv_len ) {
 107                         filter->bv_len += newbv->bv_len - oldbv->bv_len;
 108                         if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 109                                 filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 110                                                 op->o_tmpmemctx );
 111
 112                                 AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 113                                                 op->ors_filterstr.bv_len + 1 );
 114
 115                         } else {
 116                                 filter->bv_val = op->o_tmprealloc( filter->bv_val,
 117                                                 filter->bv_len + 1, op->o_tmpmemctx );
 118                         }
 119
 120                         ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 121                 }
 122
 123                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 124                                 &ptr[ oldbv->bv_len ],
 125                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 126                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 127
 128                 ptr += newbv->bv_len;
 129                 gotit = 1;
 130         }
 131
 132 done:;
 133         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 134                         filter->bv_val, gotit, 0 );
 135
 136         return gotit;
 137 }
 138
 139 int
 140 ldap_back_search(
 141                 Operation       *op,
 142                 SlapReply       *rs )
 143 {
 144         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 145
 146         ldapconn_t      *lc = NULL;
 147         struct timeval  tv;
 148         time_t          stoptime = (time_t)(-1);
 149         LDAPMessage     *res,
 150                         *e;
 151         int             rc = 0,
 152                         msgid;
 153         struct berval   match = BER_BVNULL,
 154                         filter = BER_BVNULL;
 155         int             free_filter = 0;
 156         int             i;
 157         char            **attrs = NULL;
 158         int             freetext = 0;
 159         int             do_retry = 1, dont_retry = 0;
 160         LDAPControl     **ctrls = NULL;
 161         /* FIXME: shouldn't this be null? */
 162         const char      *save_matched = rs->sr_matched;
 163
 164         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 165                 return rs->sr_err;
 166         }
 167
 168         /*
 169          * FIXME: in case of values return filter, we might want
 170          * to map attrs and maybe rewrite value
 171          */
 172
 173         /* should we check return values? */
 174         if ( op->ors_deref != -1 ) {
 175                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 176                                 (void *)&op->ors_deref );
 177         }
 178
 179         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 180                 tv.tv_sec = op->ors_tlimit;
 181                 tv.tv_usec = 0;
 182                 stoptime = op->o_time + op->ors_tlimit;
 183
 184         } else {
 185                 LDAP_BACK_TV_SET( &tv );
 186         }
 187
 188         if ( op->ors_attrs ) {
 189                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 190                         /* just count attrs */ ;
 191
 192                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 193                 if ( attrs == NULL ) {
 194                         rs->sr_err = LDAP_NO_MEMORY;
 195                         rc = -1;
 196                         goto finish;
 197                 }
 198
 199                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 200                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 201                 }
 202                 attrs[ i ] = NULL;
 203         }
 204
 205         ctrls = op->o_ctrls;
 206         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 207                 li->li_version, &li->li_idassert, op, rs, &ctrls );
 208         if ( rc != LDAP_SUCCESS ) {
 209                 goto finish;
 210         }
 211
 212         /* deal with <draft-zeilenga-ldap-t-f> filters */
 213         filter = op->ors_filterstr;
 214 retry:
 215         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 216                         op->ors_scope, filter.bv_val,
 217                         attrs, op->ors_attrsonly, ctrls, NULL,
 218                         tv.tv_sec ? &tv : NULL,
 219                         op->ors_slimit, &msgid );
 220
 221         if ( rs->sr_err != LDAP_SUCCESS ) {
 222                 switch ( rs->sr_err ) {
 223                 case LDAP_SERVER_DOWN:
 224                         if ( do_retry ) {
 225                                 do_retry = 0;
 226                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 227                                         goto retry;
 228                                 }
 229                         }
 230
 231                         if ( lc == NULL ) {
 232                                 /* reset by ldap_back_retry ... */
 233                                 rs->sr_err = slap_map_api2result( rs );
 234
 235                         } else {
 236                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 237                         }
 238
 239                         goto finish;
 240
 241                 case LDAP_FILTER_ERROR:
 242                         if ( ldap_back_munge_filter( op, &filter ) ) {
 243                                 free_filter = 1;
 244                                 goto retry;
 245                         }
 246
 247                         /* invalid filters return success with no data */
 248                         rs->sr_err = LDAP_SUCCESS;
 249                         rs->sr_text = NULL;
 250                         goto finish;
 251
 252                 default:
 253                         rs->sr_err = slap_map_api2result( rs );
 254                         rs->sr_text = NULL;
 255                         goto finish;
 256                 }
 257         }
 258
 259         /* if needed, initialize timeout */
 260         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 261                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 262                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 263                         tv.tv_usec = 0;
 264                 }
 265         }
 266
 267         /* We pull apart the ber result, stuff it into a slapd entry, and
 268          * let send_search_entry stuff it back into ber format. Slow & ugly,
 269          * but this is necessary for version matching, and for ACL processing.
 270          */
 271
 272         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 273         {
 274                 /* check for abandon */
 275                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 276                         if ( rc > 0 ) {
 277                                 ldap_msgfree( res );
 278                         }
 279                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 280                         rc = SLAPD_ABANDON;
 281                         goto finish;
 282                 }
 283
 284                 if ( rc == 0 || rc == -2 ) {
 285                         ldap_pvt_thread_yield();
 286
 287                         /* check timeout */
 288                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 289                                 if ( rc == 0 ) {
 290                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 291                                         rs->sr_text = "Operation timed out";
 292                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 293                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 294                                         goto finish;
 295                                 }
 296
 297                         } else {
 298                                 LDAP_BACK_TV_SET( &tv );
 299                         }
 300
 301                         /* check time limit */
 302                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 303                                         && slap_get_time() > stoptime )
 304                         {
 305                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 306                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 307                                 goto finish;
 308                         }
 309                         continue;
 310
 311                 } else {
 312                         /* only touch when activity actually took place... */
 313                         if ( li->li_idle_timeout && lc ) {
 314                                 lc->lc_time = op->o_time;
 315                         }
 316
 317                         /* don't retry any more */
 318                         dont_retry = 1;
 319                 }
 320
 321
 322                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 323                         Entry           ent = { 0 };
 324                         struct berval   bdn = BER_BVNULL;
 325
 326                         do_retry = 0;
 327
 328                         e = ldap_first_entry( lc->lc_ld, res );
 329                         rc = ldap_build_entry( op, e, &ent, &bdn );
 330                         if ( rc == LDAP_SUCCESS ) {
 331                                 rs->sr_entry = &ent;
 332                                 rs->sr_attrs = op->ors_attrs;
 333                                 rs->sr_operational_attrs = NULL;
 334                                 rs->sr_flags = 0;
 335                                 rs->sr_err = LDAP_SUCCESS;
 336                                 rc = rs->sr_err = send_search_entry( op, rs );
 337                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 338                                         assert( ent.e_name.bv_val != bdn.bv_val );
 339                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 340                                         BER_BVZERO( &ent.e_name );
 341                                 }
 342                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 343                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 344                                         BER_BVZERO( &ent.e_nname );
 345                                 }
 346                                 entry_clean( &ent );
 347                         }
 348                         ldap_msgfree( res );
 349                         if ( rc != LDAP_SUCCESS ) {
 350                                 if ( rc == LDAP_UNAVAILABLE ) {
 351                                         rc = rs->sr_err = LDAP_OTHER;
 352                                 } else {
 353                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 354                                 }
 355                                 goto finish;
 356                         }
 357
 358                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 359                         char            **references = NULL;
 360
 361                         do_retry = 0;
 362                         rc = ldap_parse_reference( lc->lc_ld, res,
 363                                         &references, &rs->sr_ctrls, 1 );
 364
 365                         if ( rc != LDAP_SUCCESS ) {
 366                                 continue;
 367                         }
 368
 369                         /* FIXME: there MUST be at least one */
 370                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 371                                 int             cnt;
 372
 373                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 374                                         /* NO OP */ ;
 375
 376                                 /* FIXME: there MUST be at least one */
 377                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 378                                         op->o_tmpmemctx );
 379
 380                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 381                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 382                                 }
 383                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 384
 385                                 /* ignore return value by now */
 386                                 ( void )send_search_reference( op, rs );
 387
 388                         } else {
 389                                 Debug( LDAP_DEBUG_ANY,
 390                                         "%s ldap_back_search: "
 391                                         "got SEARCH_REFERENCE "
 392                                         "with no referrals\n",
 393                                         op->o_log_prefix, 0, 0 );
 394                         }
 395
 396                         /* cleanup */
 397                         if ( references ) {
 398                                 ber_memvfree( (void **)references );
 399                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 400                                 rs->sr_ref = NULL;
 401                         }
 402
 403                         if ( rs->sr_ctrls ) {
 404                                 ldap_controls_free( rs->sr_ctrls );
 405                                 rs->sr_ctrls = NULL;
 406                         }
 407
 408                 } else {
 409                         char            **references = NULL, *err = NULL;
 410
 411                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 412                                         &match.bv_val, &err,
 413                                         &references, &rs->sr_ctrls, 1 );
 414                         if ( rc != LDAP_SUCCESS ) {
 415                                 rs->sr_err = rc;
 416                         }
 417                         rs->sr_err = slap_map_api2result( rs );
 418                         if ( err ) {
 419                                 rs->sr_text = err;
 420                                 freetext = 1;
 421                         }
 422
 423                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 424                                 int     cnt;
 425
 426                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 427                                         /* FIXME: error */
 428                                         Debug( LDAP_DEBUG_ANY,
 429                                                 "%s ldap_back_search: "
 430                                                 "got referrals with %d\n",
 431                                                 op->o_log_prefix,
 432                                                 rs->sr_err, 0 );
 433                                         rs->sr_err = LDAP_REFERRAL;
 434                                 }
 435
 436                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 437                                         /* NO OP */ ;
 438
 439                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 440                                         op->o_tmpmemctx );
 441
 442                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 443                                         /* duplicating ...*/
 444                                         ber_str2bv( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ] );
 445                                 }
 446                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 447                         }
 448
 449                         if ( match.bv_val != NULL ) {
 450                                 match.bv_len = strlen( match.bv_val );
 451                         }
 452
 453                         /* cleanup */
 454                         if ( references ) {
 455                                 ber_memvfree( (void **)references );
 456                         }
 457
 458                         rc = 0;
 459                         break;
 460                 }
 461
 462                 /* if needed, restore timeout */
 463                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 464                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 465                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 466                                 tv.tv_usec = 0;
 467                         }
 468                 }
 469         }
 470
 471         if ( rc == -1 && dont_retry == 0 ) {
 472                 if ( do_retry ) {
 473                         do_retry = 0;
 474                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 475                                 goto retry;
 476                         }
 477                 }
 478                 rs->sr_err = LDAP_SERVER_DOWN;
 479                 rs->sr_err = slap_map_api2result( rs );
 480                 goto finish;
 481         }
 482
 483         /*
 484          * Rewrite the matched portion of the search base, if required
 485          */
 486         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 487                 struct berval   pmatch;
 488
 489                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 490                         rs->sr_matched = pmatch.bv_val;
 491                         LDAP_FREE( match.bv_val );
 492
 493                 } else {
 494                         rs->sr_matched = match.bv_val;
 495                 }
 496         }
 497
 498         if ( rs->sr_v2ref ) {
 499                 rs->sr_err = LDAP_REFERRAL;
 500         }
 501
 502 finish:;
 503         if ( LDAP_BACK_QUARANTINE( li ) ) {
 504                 ldap_back_quarantine( op, rs );
 505         }
 506
 507 #if 0
 508         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 509         if ( rc != SLAPD_ABANDON )
 510 #endif
 511         {
 512                 send_ldap_result( op, rs );
 513         }
 514
 515         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 516
 517         if ( rs->sr_ctrls ) {
 518                 ldap_controls_free( rs->sr_ctrls );
 519                 rs->sr_ctrls = NULL;
 520         }
 521
 522         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 523                 if ( rs->sr_matched != match.bv_val ) {
 524                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 525
 526                 } else {
 527                         LDAP_FREE( match.bv_val );
 528                 }
 529                 rs->sr_matched = save_matched;
 530         }
 531
 532         if ( free_filter ) {
 533                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 534         }
 535
 536         if ( rs->sr_text ) {
 537                 if ( freetext ) {
 538                         LDAP_FREE( (char *)rs->sr_text );
 539                 }
 540                 rs->sr_text = NULL;
 541         }
 542
 543         if ( rs->sr_ref ) {
 544                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 545                 rs->sr_ref = NULL;
 546         }
 547
 548         if ( attrs ) {
 549                 ch_free( attrs );
 550         }
 551
 552         if ( lc != NULL ) {
 553                 ldap_back_release_conn( li, lc );
 554         }
 555
 556         return rs->sr_err;
 557 }
 558
 559 static int
 560 ldap_build_entry(
 561                 Operation       *op,
 562                 LDAPMessage     *e,
 563                 Entry           *ent,
 564                 struct berval   *bdn )
 565 {
 566         struct berval   a;
 567         BerElement      ber = *e->lm_ber;
 568         Attribute       *attr, **attrp;
 569         const char      *text;
 570         int             last;
 571
 572         /* safe assumptions ... */
 573         assert( ent != NULL );
 574         BER_BVZERO( &ent->e_bv );
 575
 576         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 577                 return LDAP_DECODING_ERROR;
 578         }
 579
 580         /*
 581          * Note: this may fail if the target host(s) schema differs
 582          * from the one known to the meta, and a DN with unknown
 583          * attributes is returned.
 584          *
 585          * FIXME: should we log anything, or delegate to dnNormalize?
 586          */
 587         /* Note: if the distinguished values or the naming attributes
 588          * change, should we massage them as well?
 589          */
 590         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 591                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 592         {
 593                 return LDAP_INVALID_DN_SYNTAX;
 594         }
 595
 596         attrp = &ent->e_attrs;
 597
 598         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 599                 int                             i;
 600                 slap_syntax_validate_func       *validate;
 601                 slap_syntax_transform_func      *pretty;
 602
 603                 attr = attr_alloc( NULL );
 604                 if ( attr == NULL ) {
 605                         continue;
 606                 }
 607                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 608                                 != LDAP_SUCCESS )
 609                 {
 610                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 611                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 612                         {
 613                                 Debug( LDAP_DEBUG_ANY,
 614                                         "%s ldap_build_entry: "
 615                                         "slap_bv2undef_ad(%s): %s\n",
 616                                         op->o_log_prefix, a.bv_val, text );
 617                                 attr_free( attr );
 618                                 continue;
 619                         }
 620                 }
 621
 622                 /* no subschemaSubentry */
 623                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 624                         || attr->a_desc == slap_schema.si_ad_entryDN )
 625                 {
 626
 627                         /*
 628                          * We eat target's subschemaSubentry because
 629                          * a search for this value is likely not
 630                          * to resolve to the appropriate backend;
 631                          * later, the local subschemaSubentry is
 632                          * added.
 633                          *
 634                          * We also eat entryDN because the frontend
 635                          * will reattach it without checking if already
 636                          * present...
 637                          */
 638                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 639
 640                         attr_free( attr );
 641                         continue;
 642                 }
 643
 644                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 645                                 || attr->a_vals == NULL )
 646                 {
 647                         /*
 648                          * Note: attr->a_vals can be null when using
 649                          * values result filter
 650                          */
 651                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 652                         last = 0;
 653
 654                 } else {
 655                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 656                                 /* just count vals */ ;
 657                 }
 658
 659                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 660                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 661
 662                 if ( !validate && !pretty ) {
 663                         attr->a_nvals = NULL;
 664                         attr_free( attr );
 665                         goto next_attr;
 666                 }
 667
 668                 for ( i = 0; i < last; i++ ) {
 669                         struct berval   pval;
 670                         int             rc;
 671
 672                         if ( pretty ) {
 673                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 674                                         &attr->a_vals[i], &pval, NULL );
 675
 676                         } else {
 677                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 678                                         &attr->a_vals[i] );
 679                         }
 680
 681                         if ( rc != LDAP_SUCCESS ) {
 682                                 /* check if, by chance, it's an undefined objectClass */
 683                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 684                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 685                                 {
 686                                         ber_dupbv( &pval, &attr->a_vals[i] );
 687
 688                                 } else {
 689                                         attr->a_nvals = NULL;
 690                                         attr_free( attr );
 691                                         goto next_attr;
 692                                 }
 693                         }
 694
 695                         if ( pretty ) {
 696                                 LBER_FREE( attr->a_vals[i].bv_val );
 697                                 attr->a_vals[i] = pval;
 698                         }
 699                 }
 700
 701                 if ( last && attr->a_desc->ad_type->sat_equality &&
 702                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 703                 {
 704                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 705                         for ( i = 0; i < last; i++ ) {
 706                                 int             rc;
 707
 708                                 /*
 709                                  * check that each value is valid per syntax
 710                                  * and pretty if appropriate
 711                                  */
 712                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 713                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 714                                         attr->a_desc->ad_type->sat_syntax,
 715                                         attr->a_desc->ad_type->sat_equality,
 716                                         &attr->a_vals[i], &attr->a_nvals[i],
 717                                         NULL );
 718
 719                                 if ( rc != LDAP_SUCCESS ) {
 720                                         BER_BVZERO( &attr->a_nvals[i] );
 721                                         attr_free( attr );
 722                                         goto next_attr;
 723                                 }
 724                         }
 725                         BER_BVZERO( &attr->a_nvals[i] );
 726
 727                 } else {
 728                         attr->a_nvals = attr->a_vals;
 729                 }
 730                 *attrp = attr;
 731                 attrp = &attr->a_next;
 732
 733 next_attr:;
 734         }
 735
 736         return LDAP_SUCCESS;
 737 }
 738
 739 /* return 0 IFF we can retrieve the entry with ndn
 740  */
 741 int
 742 ldap_back_entry_get(
 743                 Operation               *op,
 744                 struct berval           *ndn,
 745                 ObjectClass             *oc,
 746                 AttributeDescription    *at,
 747                 int                     rw,
 748                 Entry                   **ent )
 749 {
 750         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 751
 752         ldapconn_t      *lc = NULL;
 753         int             rc = 1,
 754                         do_not_cache;
 755         struct berval   bdn;
 756         LDAPMessage     *result = NULL,
 757                         *e = NULL;
 758         char            *attr[3], **attrp = NULL;
 759         char            *filter = NULL;
 760         SlapReply       rs;
 761         int             do_retry = 1;
 762         LDAPControl     **ctrls = NULL;
 763
 764         *ent = NULL;
 765
 766         /* Tell getconn this is a privileged op */
 767         do_not_cache = op->o_do_not_cache;
 768         op->o_do_not_cache = 1;
 769         if ( !ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 770                 op->o_do_not_cache = do_not_cache;
 771                 return rs.sr_err;
 772         }
 773         op->o_do_not_cache = do_not_cache;
 774
 775         if ( at ) {
 776                 attrp = attr;
 777                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 778                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 779                         attr[1] = at->ad_cname.bv_val;
 780                         attr[2] = NULL;
 781
 782                 } else {
 783                         attr[0] = at->ad_cname.bv_val;
 784                         attr[1] = NULL;
 785                 }
 786         }
 787
 788         if ( oc ) {
 789                 char    *ptr;
 790
 791                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 792                                 + oc->soc_cname.bv_len + 1 );
 793                 ptr = lutil_strcopy( filter, "(objectclass=" );
 794                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 795                 *ptr++ = ')';
 796                 *ptr++ = '\0';
 797         }
 798
 799 retry:
 800         ctrls = op->o_ctrls;
 801         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 802                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 803         if ( rc != LDAP_SUCCESS ) {
 804                 goto cleanup;
 805         }
 806
 807         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 808                                 attrp, 0, ctrls, NULL,
 809                                 NULL, LDAP_NO_LIMIT, &result );
 810         if ( rc != LDAP_SUCCESS ) {
 811                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 812                         do_retry = 0;
 813                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 814                                 /* if the identity changed, there might be need to re-authz */
 815                                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 816                                 goto retry;
 817                         }
 818                 }
 819                 goto cleanup;
 820         }
 821
 822         e = ldap_first_entry( lc->lc_ld, result );
 823         if ( e == NULL ) {
 824                 /* the entry exists, but it doesn't match the filter? */
 825                 goto cleanup;
 826         }
 827
 828         *ent = entry_alloc();
 829         if ( *ent == NULL ) {
 830                 rc = LDAP_NO_MEMORY;
 831                 goto cleanup;
 832         }
 833
 834         rc = ldap_build_entry( op, e, *ent, &bdn );
 835
 836         if ( rc != LDAP_SUCCESS ) {
 837                 entry_free( *ent );
 838                 *ent = NULL;
 839         }
 840
 841 cleanup:
 842         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 843
 844         if ( result ) {
 845                 ldap_msgfree( result );
 846         }
 847
 848         if ( filter ) {
 849                 ch_free( filter );
 850         }
 851
 852         if ( lc != NULL ) {
 853                 ldap_back_release_conn( li, lc );
 854         }
 855
 856         return rc;
 857 }
 858