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 #ifndef LDAP_NULL_IS_NULL
 451                                 if ( match.bv_val[ 0 ] == '\0' ) {
 452                                         LDAP_FREE( match.bv_val );
 453                                         BER_BVZERO( &match );
 454                                 } else
 455 #endif /* LDAP_NULL_IS_NULL */
 456                                 {
 457                                         match.bv_len = strlen( match.bv_val );
 458                                 }
 459                         }
 460 #ifndef LDAP_NULL_IS_NULL
 461                         if ( rs->sr_text != NULL && rs->sr_text[ 0 ] == '\0' ) {
 462                                 LDAP_FREE( (char *)rs->sr_text );
 463                                 rs->sr_text = NULL;
 464                         }
 465 #endif /* LDAP_NULL_IS_NULL */
 466
 467                         /* cleanup */
 468                         if ( references ) {
 469                                 ber_memvfree( (void **)references );
 470                         }
 471
 472                         rc = 0;
 473                         break;
 474                 }
 475
 476                 /* if needed, restore timeout */
 477                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 478                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 479                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 480                                 tv.tv_usec = 0;
 481                         }
 482                 }
 483         }
 484
 485         if ( rc == -1 && dont_retry == 0 ) {
 486                 if ( do_retry ) {
 487                         do_retry = 0;
 488                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 489                                 goto retry;
 490                         }
 491                 }
 492                 rs->sr_err = LDAP_SERVER_DOWN;
 493                 rs->sr_err = slap_map_api2result( rs );
 494                 goto finish;
 495         }
 496
 497         /*
 498          * Rewrite the matched portion of the search base, if required
 499          */
 500         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 501                 struct berval   pmatch;
 502
 503                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 504                         rs->sr_matched = pmatch.bv_val;
 505                         LDAP_FREE( match.bv_val );
 506
 507                 } else {
 508                         rs->sr_matched = match.bv_val;
 509                 }
 510         }
 511
 512         if ( rs->sr_v2ref ) {
 513                 rs->sr_err = LDAP_REFERRAL;
 514         }
 515
 516 finish:;
 517         if ( LDAP_BACK_QUARANTINE( li ) ) {
 518                 ldap_back_quarantine( op, rs );
 519         }
 520
 521 #if 0
 522         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 523         if ( rc != SLAPD_ABANDON )
 524 #endif
 525         {
 526                 send_ldap_result( op, rs );
 527         }
 528
 529         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 530
 531         if ( rs->sr_ctrls ) {
 532                 ldap_controls_free( rs->sr_ctrls );
 533                 rs->sr_ctrls = NULL;
 534         }
 535
 536         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 537                 if ( rs->sr_matched != match.bv_val ) {
 538                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 539
 540                 } else {
 541                         LDAP_FREE( match.bv_val );
 542                 }
 543                 rs->sr_matched = save_matched;
 544         }
 545
 546         if ( free_filter ) {
 547                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 548         }
 549
 550         if ( rs->sr_text ) {
 551                 if ( freetext ) {
 552                         LDAP_FREE( (char *)rs->sr_text );
 553                 }
 554                 rs->sr_text = NULL;
 555         }
 556
 557         if ( rs->sr_ref ) {
 558                 ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
 559                 rs->sr_ref = NULL;
 560         }
 561
 562         if ( attrs ) {
 563                 ch_free( attrs );
 564         }
 565
 566         if ( lc != NULL ) {
 567                 ldap_back_release_conn( li, lc );
 568         }
 569
 570         return rs->sr_err;
 571 }
 572
 573 static int
 574 ldap_build_entry(
 575                 Operation       *op,
 576                 LDAPMessage     *e,
 577                 Entry           *ent,
 578                 struct berval   *bdn )
 579 {
 580         struct berval   a;
 581         BerElement      ber = *e->lm_ber;
 582         Attribute       *attr, **attrp;
 583         const char      *text;
 584         int             last;
 585
 586         /* safe assumptions ... */
 587         assert( ent != NULL );
 588         BER_BVZERO( &ent->e_bv );
 589
 590         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 591                 return LDAP_DECODING_ERROR;
 592         }
 593
 594         /*
 595          * Note: this may fail if the target host(s) schema differs
 596          * from the one known to the meta, and a DN with unknown
 597          * attributes is returned.
 598          *
 599          * FIXME: should we log anything, or delegate to dnNormalize?
 600          */
 601         /* Note: if the distinguished values or the naming attributes
 602          * change, should we massage them as well?
 603          */
 604         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 605                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 606         {
 607                 return LDAP_INVALID_DN_SYNTAX;
 608         }
 609
 610         attrp = &ent->e_attrs;
 611
 612         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 613                 int                             i;
 614                 slap_syntax_validate_func       *validate;
 615                 slap_syntax_transform_func      *pretty;
 616
 617                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 618                 if ( attr == NULL ) {
 619                         continue;
 620                 }
 621                 attr->a_flags = 0;
 622                 attr->a_next = 0;
 623                 attr->a_desc = NULL;
 624                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 625                                 != LDAP_SUCCESS )
 626                 {
 627                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 628                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 629                         {
 630                                 Debug( LDAP_DEBUG_ANY,
 631                                         "%s ldap_build_entry: "
 632                                         "slap_bv2undef_ad(%s): %s\n",
 633                                         op->o_log_prefix, a.bv_val, text );
 634                                 ch_free( attr );
 635                                 continue;
 636                         }
 637                 }
 638
 639                 /* no subschemaSubentry */
 640                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 641                         || attr->a_desc == slap_schema.si_ad_entryDN )
 642                 {
 643
 644                         /*
 645                          * We eat target's subschemaSubentry because
 646                          * a search for this value is likely not
 647                          * to resolve to the appropriate backend;
 648                          * later, the local subschemaSubentry is
 649                          * added.
 650                          *
 651                          * We also eat entryDN because the frontend
 652                          * will reattach it without checking if already
 653                          * present...
 654                          */
 655                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 656
 657                         ch_free( attr );
 658                         continue;
 659                 }
 660
 661                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 662                                 || attr->a_vals == NULL )
 663                 {
 664                         /*
 665                          * Note: attr->a_vals can be null when using
 666                          * values result filter
 667                          */
 668                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 669                         last = 0;
 670
 671                 } else {
 672                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 673                                 /* just count vals */ ;
 674                 }
 675
 676                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 677                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 678
 679                 if ( !validate && !pretty ) {
 680                         attr->a_nvals = NULL;
 681                         attr_free( attr );
 682                         goto next_attr;
 683                 }
 684
 685                 for ( i = 0; i < last; i++ ) {
 686                         struct berval   pval;
 687                         int             rc;
 688
 689                         if ( pretty ) {
 690                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 691                                         &attr->a_vals[i], &pval, NULL );
 692
 693                         } else {
 694                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 695                                         &attr->a_vals[i] );
 696                         }
 697
 698                         if ( rc != LDAP_SUCCESS ) {
 699                                 /* check if, by chance, it's an undefined objectClass */
 700                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 701                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 702                                 {
 703                                         ber_dupbv( &pval, &attr->a_vals[i] );
 704
 705                                 } else {
 706                                         attr->a_nvals = NULL;
 707                                         attr_free( attr );
 708                                         goto next_attr;
 709                                 }
 710                         }
 711
 712                         if ( pretty ) {
 713                                 LBER_FREE( attr->a_vals[i].bv_val );
 714                                 attr->a_vals[i] = pval;
 715                         }
 716                 }
 717
 718                 if ( last && attr->a_desc->ad_type->sat_equality &&
 719                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 720                 {
 721                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 722                         for ( i = 0; i < last; i++ ) {
 723                                 int             rc;
 724
 725                                 /*
 726                                  * check that each value is valid per syntax
 727                                  * and pretty if appropriate
 728                                  */
 729                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 730                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 731                                         attr->a_desc->ad_type->sat_syntax,
 732                                         attr->a_desc->ad_type->sat_equality,
 733                                         &attr->a_vals[i], &attr->a_nvals[i],
 734                                         NULL );
 735
 736                                 if ( rc != LDAP_SUCCESS ) {
 737                                         BER_BVZERO( &attr->a_nvals[i] );
 738                                         ch_free( attr );
 739                                         goto next_attr;
 740                                 }
 741                         }
 742                         BER_BVZERO( &attr->a_nvals[i] );
 743
 744                 } else {
 745                         attr->a_nvals = attr->a_vals;
 746                 }
 747                 *attrp = attr;
 748                 attrp = &attr->a_next;
 749
 750 next_attr:;
 751         }
 752
 753         return LDAP_SUCCESS;
 754 }
 755
 756 /* return 0 IFF we can retrieve the entry with ndn
 757  */
 758 int
 759 ldap_back_entry_get(
 760                 Operation               *op,
 761                 struct berval           *ndn,
 762                 ObjectClass             *oc,
 763                 AttributeDescription    *at,
 764                 int                     rw,
 765                 Entry                   **ent )
 766 {
 767         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 768
 769         ldapconn_t      *lc = NULL;
 770         int             rc = 1,
 771                         do_not_cache;
 772         struct berval   bdn;
 773         LDAPMessage     *result = NULL,
 774                         *e = NULL;
 775         char            *attr[3], **attrp = NULL;
 776         char            *filter = NULL;
 777         SlapReply       rs;
 778         int             do_retry = 1;
 779         LDAPControl     **ctrls = NULL;
 780
 781         *ent = NULL;
 782
 783         /* Tell getconn this is a privileged op */
 784         do_not_cache = op->o_do_not_cache;
 785         op->o_do_not_cache = 1;
 786         if ( !ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 787                 op->o_do_not_cache = do_not_cache;
 788                 return rs.sr_err;
 789         }
 790         op->o_do_not_cache = do_not_cache;
 791
 792         if ( at ) {
 793                 attrp = attr;
 794                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 795                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 796                         attr[1] = at->ad_cname.bv_val;
 797                         attr[2] = NULL;
 798
 799                 } else {
 800                         attr[0] = at->ad_cname.bv_val;
 801                         attr[1] = NULL;
 802                 }
 803         }
 804
 805         if ( oc ) {
 806                 char    *ptr;
 807
 808                 filter = ch_malloc( STRLENOF( "(objectclass=)" )
 809                                 + oc->soc_cname.bv_len + 1 );
 810                 ptr = lutil_strcopy( filter, "(objectclass=" );
 811                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 812                 *ptr++ = ')';
 813                 *ptr++ = '\0';
 814         }
 815
 816 retry:
 817         ctrls = op->o_ctrls;
 818         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 819                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 820         if ( rc != LDAP_SUCCESS ) {
 821                 goto cleanup;
 822         }
 823
 824         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 825                                 attrp, 0, ctrls, NULL,
 826                                 NULL, LDAP_NO_LIMIT, &result );
 827         if ( rc != LDAP_SUCCESS ) {
 828                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 829                         do_retry = 0;
 830                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 831                                 /* if the identity changed, there might be need to re-authz */
 832                                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 833                                 goto retry;
 834                         }
 835                 }
 836                 goto cleanup;
 837         }
 838
 839         e = ldap_first_entry( lc->lc_ld, result );
 840         if ( e == NULL ) {
 841                 /* the entry exists, but it doesn't match the filter? */
 842                 goto cleanup;
 843         }
 844
 845         *ent = ch_calloc( 1, sizeof( Entry ) );
 846         if ( *ent == NULL ) {
 847                 rc = LDAP_NO_MEMORY;
 848                 goto cleanup;
 849         }
 850
 851         rc = ldap_build_entry( op, e, *ent, &bdn );
 852
 853         if ( rc != LDAP_SUCCESS ) {
 854                 entry_free( *ent );
 855                 *ent = NULL;
 856         }
 857
 858 cleanup:
 859         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 860
 861         if ( result ) {
 862                 ldap_msgfree( result );
 863         }
 864
 865         if ( filter ) {
 866                 ch_free( filter );
 867         }
 868
 869         if ( lc != NULL ) {
 870                 ldap_back_release_conn( li, lc );
 871         }
 872
 873         return rc;
 874 }
 875