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 1999-2008 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                 /* if undef or invalid filter is not allowed,
 106                  * don't rewrite filter */
 107                 if ( LDAP_BACK_NOUNDEFFILTER( li ) ) {
 108                         return -1;
 109                 }
 110
 111                 oldfilter = *filter;
 112                 filter->bv_len += newbv->bv_len - oldbv->bv_len;
 113                 if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 114                         filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 115                                         op->o_tmpmemctx );
 116
 117                         AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 118                                         op->ors_filterstr.bv_len + 1 );
 119
 120                 } else {
 121                         filter->bv_val = op->o_tmprealloc( filter->bv_val,
 122                                         filter->bv_len + 1, op->o_tmpmemctx );
 123                 }
 124
 125                 ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 126
 127                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 128                                 &ptr[ oldbv->bv_len ],
 129                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 130                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 131
 132                 ptr += newbv->bv_len;
 133                 gotit = 1;
 134         }
 135
 136 done:;
 137         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 138                         filter->bv_val, gotit, 0 );
 139
 140         return gotit;
 141 }
 142
 143 int
 144 ldap_back_search(
 145                 Operation       *op,
 146                 SlapReply       *rs )
 147 {
 148         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 149
 150         ldapconn_t      *lc = NULL;
 151         struct timeval  tv;
 152         time_t          stoptime = (time_t)(-1);
 153         LDAPMessage     *res,
 154                         *e;
 155         int             rc = 0,
 156                         msgid;
 157         struct berval   match = BER_BVNULL,
 158                         filter = BER_BVNULL;
 159         int             free_filter = 0;
 160         int             i;
 161         char            **attrs = NULL;
 162         int             freetext = 0;
 163         int             do_retry = 1, dont_retry = 0;
 164         LDAPControl     **ctrls = NULL;
 165         char            **references = NULL;
 166
 167         /* FIXME: shouldn't this be null? */
 168         const char      *save_matched = rs->sr_matched;
 169
 170         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 171                 return rs->sr_err;
 172         }
 173
 174         /*
 175          * FIXME: in case of values return filter, we might want
 176          * to map attrs and maybe rewrite value
 177          */
 178
 179         /* should we check return values? */
 180         if ( op->ors_deref != -1 ) {
 181                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 182                                 (void *)&op->ors_deref );
 183         }
 184
 185         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 186                 tv.tv_sec = op->ors_tlimit;
 187                 tv.tv_usec = 0;
 188                 stoptime = op->o_time + op->ors_tlimit;
 189
 190         } else {
 191                 LDAP_BACK_TV_SET( &tv );
 192         }
 193
 194         if ( op->ors_attrs ) {
 195                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 196                         /* just count attrs */ ;
 197
 198                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 199                 if ( attrs == NULL ) {
 200                         rs->sr_err = LDAP_NO_MEMORY;
 201                         rc = -1;
 202                         goto finish;
 203                 }
 204
 205                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 206                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 207                 }
 208                 attrs[ i ] = NULL;
 209         }
 210
 211         ctrls = op->o_ctrls;
 212         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 213         if ( rc != LDAP_SUCCESS ) {
 214                 goto finish;
 215         }
 216
 217         /* deal with <draft-zeilenga-ldap-t-f> filters */
 218         filter = op->ors_filterstr;
 219 retry:
 220         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 221                         op->ors_scope, filter.bv_val,
 222                         attrs, op->ors_attrsonly, ctrls, NULL,
 223                         tv.tv_sec ? &tv : NULL,
 224                         op->ors_slimit, &msgid );
 225
 226         if ( rs->sr_err != LDAP_SUCCESS ) {
 227                 switch ( rs->sr_err ) {
 228                 case LDAP_SERVER_DOWN:
 229                         if ( do_retry ) {
 230                                 do_retry = 0;
 231                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 232                                         goto retry;
 233                                 }
 234                         }
 235
 236                         if ( lc == NULL ) {
 237                                 /* reset by ldap_back_retry ... */
 238                                 rs->sr_err = slap_map_api2result( rs );
 239
 240                         } else {
 241                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 242                         }
 243
 244                         goto finish;
 245
 246                 case LDAP_FILTER_ERROR:
 247                         switch (ldap_back_munge_filter( op, &filter ) ) {
 248                         case 0:
 249                         case -1:
 250                                 /* invalid filters return success with no data */
 251                                 rs->sr_err = LDAP_SUCCESS;
 252                                 rs->sr_text = NULL;
 253                                 break;
 254
 255                         case 1:
 256                                 free_filter = 1;
 257                                 goto retry;
 258                         }
 259                         goto finish;
 260
 261                 default:
 262                         rs->sr_err = slap_map_api2result( rs );
 263                         rs->sr_text = NULL;
 264                         goto finish;
 265                 }
 266         }
 267
 268         /* if needed, initialize timeout */
 269         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 270                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 271                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 272                         tv.tv_usec = 0;
 273                 }
 274         }
 275
 276         /* We pull apart the ber result, stuff it into a slapd entry, and
 277          * let send_search_entry stuff it back into ber format. Slow & ugly,
 278          * but this is necessary for version matching, and for ACL processing.
 279          */
 280
 281         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 282         {
 283                 /* check for abandon */
 284                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 285                         if ( rc > 0 ) {
 286                                 ldap_msgfree( res );
 287                         }
 288                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 289                         rc = SLAPD_ABANDON;
 290                         goto finish;
 291                 }
 292
 293                 if ( rc == 0 || rc == -2 ) {
 294                         ldap_pvt_thread_yield();
 295
 296                         /* check timeout */
 297                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 298                                 if ( rc == 0 ) {
 299                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 300                                         rs->sr_text = "Operation timed out";
 301                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 302                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 303                                         goto finish;
 304                                 }
 305
 306                         } else {
 307                                 LDAP_BACK_TV_SET( &tv );
 308                         }
 309
 310                         /* check time limit */
 311                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 312                                         && slap_get_time() > stoptime )
 313                         {
 314                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 315                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 316                                 goto finish;
 317                         }
 318                         continue;
 319
 320                 } else {
 321                         /* only touch when activity actually took place... */
 322                         if ( li->li_idle_timeout && lc ) {
 323                                 lc->lc_time = op->o_time;
 324                         }
 325
 326                         /* don't retry any more */
 327                         dont_retry = 1;
 328                 }
 329
 330
 331                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 332                         Entry           ent = { 0 };
 333                         struct berval   bdn = BER_BVNULL;
 334
 335                         do_retry = 0;
 336
 337                         e = ldap_first_entry( lc->lc_ld, res );
 338                         rc = ldap_build_entry( op, e, &ent, &bdn );
 339                         if ( rc == LDAP_SUCCESS ) {
 340                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 341                                 rs->sr_entry = &ent;
 342                                 rs->sr_attrs = op->ors_attrs;
 343                                 rs->sr_operational_attrs = NULL;
 344                                 rs->sr_flags = 0;
 345                                 rs->sr_err = LDAP_SUCCESS;
 346                                 rc = rs->sr_err = send_search_entry( op, rs );
 347                                 if ( rs->sr_ctrls ) {
 348                                         ldap_controls_free( rs->sr_ctrls );
 349                                         rs->sr_ctrls = NULL;
 350                                 }
 351                                 rs->sr_entry = NULL;
 352                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 353                                         assert( ent.e_name.bv_val != bdn.bv_val );
 354                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 355                                         BER_BVZERO( &ent.e_name );
 356                                 }
 357                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 358                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 359                                         BER_BVZERO( &ent.e_nname );
 360                                 }
 361                                 entry_clean( &ent );
 362                         }
 363                         ldap_msgfree( res );
 364                         if ( rc != LDAP_SUCCESS ) {
 365                                 if ( rc == LDAP_UNAVAILABLE ) {
 366                                         rc = rs->sr_err = LDAP_OTHER;
 367                                 } else {
 368                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 369                                 }
 370                                 goto finish;
 371                         }
 372
 373                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 374                         if ( LDAP_BACK_NOREFS( li ) ) {
 375                                 ldap_msgfree( res );
 376                                 continue;
 377                         }
 378
 379                         do_retry = 0;
 380                         rc = ldap_parse_reference( lc->lc_ld, res,
 381                                         &references, &rs->sr_ctrls, 1 );
 382
 383                         if ( rc != LDAP_SUCCESS ) {
 384                                 continue;
 385                         }
 386
 387                         /* FIXME: there MUST be at least one */
 388                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 389                                 int             cnt;
 390
 391                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 392                                         /* NO OP */ ;
 393
 394                                 /* FIXME: there MUST be at least one */
 395                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 396                                         op->o_tmpmemctx );
 397
 398                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 399                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 400                                 }
 401                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 402
 403                                 /* ignore return value by now */
 404                                 rs->sr_entry = NULL;
 405                                 ( void )send_search_reference( op, rs );
 406
 407                         } else {
 408                                 Debug( LDAP_DEBUG_ANY,
 409                                         "%s ldap_back_search: "
 410                                         "got SEARCH_REFERENCE "
 411                                         "with no referrals\n",
 412                                         op->o_log_prefix, 0, 0 );
 413                         }
 414
 415                         /* cleanup */
 416                         if ( references ) {
 417                                 ber_memvfree( (void **)references );
 418                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 419                                 rs->sr_ref = NULL;
 420                                 references = NULL;
 421                         }
 422
 423                         if ( rs->sr_ctrls ) {
 424                                 ldap_controls_free( rs->sr_ctrls );
 425                                 rs->sr_ctrls = NULL;
 426                         }
 427
 428                 } else {
 429                         char            *err = NULL;
 430
 431                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 432                                         &match.bv_val, &err,
 433                                         &references, &rs->sr_ctrls, 1 );
 434                         if ( rc != LDAP_SUCCESS ) {
 435                                 rs->sr_err = rc;
 436                         }
 437                         rs->sr_err = slap_map_api2result( rs );
 438                         if ( err ) {
 439                                 rs->sr_text = err;
 440                                 freetext = 1;
 441                         }
 442
 443                         /* RFC 4511: referrals can only appear
 444                          * if result code is LDAP_REFERRAL */
 445                         if ( references
 446                                 && references[ 0 ]
 447                                 && references[ 0 ][ 0 ] )
 448                         {
 449                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 450                                         Debug( LDAP_DEBUG_ANY,
 451                                                 "%s ldap_back_search: "
 452                                                 "got referrals with err=%d\n",
 453                                                 op->o_log_prefix,
 454                                                 rs->sr_err, 0 );
 455
 456                                 } else {
 457                                         int     cnt;
 458
 459                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 460                                                 /* NO OP */ ;
 461
 462                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 463                                                 op->o_tmpmemctx );
 464
 465                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 466                                                 /* duplicating ...*/
 467                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 468                                         }
 469                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 470                                 }
 471
 472                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 473                                 Debug( LDAP_DEBUG_ANY,
 474                                         "%s ldap_back_search: "
 475                                         "got err=%d with null "
 476                                         "or empty referrals\n",
 477                                         op->o_log_prefix,
 478                                         rs->sr_err, 0 );
 479
 480                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 481                         }
 482
 483                         if ( match.bv_val != NULL ) {
 484                                 match.bv_len = strlen( match.bv_val );
 485                         }
 486
 487                         rc = 0;
 488                         break;
 489                 }
 490
 491                 /* if needed, restore timeout */
 492                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 493                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 494                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 495                                 tv.tv_usec = 0;
 496                         }
 497                 }
 498         }
 499
 500         if ( rc == -1 && dont_retry == 0 ) {
 501                 if ( do_retry ) {
 502                         do_retry = 0;
 503                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 504                                 goto retry;
 505                         }
 506                 }
 507                 rs->sr_err = LDAP_SERVER_DOWN;
 508                 rs->sr_err = slap_map_api2result( rs );
 509                 goto finish;
 510         }
 511
 512         /*
 513          * Rewrite the matched portion of the search base, if required
 514          */
 515         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 516                 struct berval   pmatch;
 517
 518                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 519                         rs->sr_matched = pmatch.bv_val;
 520                         LDAP_FREE( match.bv_val );
 521
 522                 } else {
 523                         rs->sr_matched = match.bv_val;
 524                 }
 525         }
 526
 527         if ( rs->sr_v2ref ) {
 528                 rs->sr_err = LDAP_REFERRAL;
 529         }
 530
 531 finish:;
 532         if ( LDAP_BACK_QUARANTINE( li ) ) {
 533                 ldap_back_quarantine( op, rs );
 534         }
 535
 536 #if 0
 537         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 538         if ( rc != SLAPD_ABANDON )
 539 #endif
 540         {
 541                 send_ldap_result( op, rs );
 542         }
 543
 544         (void)ldap_back_controls_free( op, rs, &ctrls );
 545
 546         if ( rs->sr_ctrls ) {
 547                 ldap_controls_free( rs->sr_ctrls );
 548                 rs->sr_ctrls = NULL;
 549         }
 550
 551         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 552                 if ( rs->sr_matched != match.bv_val ) {
 553                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 554
 555                 } else {
 556                         LDAP_FREE( match.bv_val );
 557                 }
 558                 rs->sr_matched = save_matched;
 559         }
 560
 561         if ( free_filter ) {
 562                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 563         }
 564
 565         if ( rs->sr_text ) {
 566                 if ( freetext ) {
 567                         LDAP_FREE( (char *)rs->sr_text );
 568                 }
 569                 rs->sr_text = NULL;
 570         }
 571
 572         if ( rs->sr_ref ) {
 573                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 574                 rs->sr_ref = NULL;
 575         }
 576
 577         if ( references ) {
 578                 ber_memvfree( (void **)references );
 579         }
 580
 581         if ( attrs ) {
 582                 ch_free( attrs );
 583         }
 584
 585         if ( lc != NULL ) {
 586                 ldap_back_release_conn( li, lc );
 587         }
 588
 589         return rs->sr_err;
 590 }
 591
 592 static int
 593 ldap_build_entry(
 594                 Operation       *op,
 595                 LDAPMessage     *e,
 596                 Entry           *ent,
 597                 struct berval   *bdn )
 598 {
 599         struct berval   a;
 600         BerElement      ber = *e->lm_ber;
 601         Attribute       *attr, **attrp;
 602         const char      *text;
 603         int             last;
 604         char *lastb;
 605         ber_len_t len;
 606
 607         /* safe assumptions ... */
 608         assert( ent != NULL );
 609         BER_BVZERO( &ent->e_bv );
 610
 611         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 612                 return LDAP_DECODING_ERROR;
 613         }
 614
 615         /*
 616          * Note: this may fail if the target host(s) schema differs
 617          * from the one known to the meta, and a DN with unknown
 618          * attributes is returned.
 619          *
 620          * FIXME: should we log anything, or delegate to dnNormalize?
 621          */
 622         /* Note: if the distinguished values or the naming attributes
 623          * change, should we massage them as well?
 624          */
 625         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 626                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 627         {
 628                 return LDAP_INVALID_DN_SYNTAX;
 629         }
 630
 631         ent->e_attrs = NULL;
 632         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 633                 return LDAP_SUCCESS;
 634         }
 635
 636         attrp = &ent->e_attrs;
 637         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 638                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 639                 int                             i;
 640                 slap_syntax_validate_func       *validate;
 641                 slap_syntax_transform_func      *pretty;
 642
 643                 attr = attr_alloc( NULL );
 644                 if ( attr == NULL ) {
 645                         continue;
 646                 }
 647                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 648                                 != LDAP_SUCCESS )
 649                 {
 650                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 651                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 652                         {
 653                                 Debug( LDAP_DEBUG_ANY,
 654                                         "%s ldap_build_entry: "
 655                                         "slap_bv2undef_ad(%s): %s\n",
 656                                         op->o_log_prefix, a.bv_val, text );
 657                                 attr_free( attr );
 658                                 continue;
 659                         }
 660                 }
 661
 662                 /* no subschemaSubentry */
 663                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 664                         || attr->a_desc == slap_schema.si_ad_entryDN )
 665                 {
 666
 667                         /*
 668                          * We eat target's subschemaSubentry because
 669                          * a search for this value is likely not
 670                          * to resolve to the appropriate backend;
 671                          * later, the local subschemaSubentry is
 672                          * added.
 673                          *
 674                          * We also eat entryDN because the frontend
 675                          * will reattach it without checking if already
 676                          * present...
 677                          */
 678                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 679
 680                         attr_free( attr );
 681                         continue;
 682                 }
 683
 684                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 685                                 || attr->a_vals == NULL )
 686                 {
 687                         /*
 688                          * Note: attr->a_vals can be null when using
 689                          * values result filter
 690                          */
 691                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 692                 }
 693
 694                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 695                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 696
 697                 if ( !validate && !pretty ) {
 698                         attr->a_nvals = NULL;
 699                         attr_free( attr );
 700                         goto next_attr;
 701                 }
 702
 703                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) {
 704                         struct berval   pval;
 705                         int             rc;
 706
 707                         if ( pretty ) {
 708                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 709                                         &attr->a_vals[i], &pval, NULL );
 710
 711                         } else {
 712                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 713                                         &attr->a_vals[i] );
 714                         }
 715
 716                         if ( rc != LDAP_SUCCESS ) {
 717                                 /* check if, by chance, it's an undefined objectClass */
 718                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 719                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 720                                 {
 721                                         ber_dupbv( &pval, &attr->a_vals[i] );
 722
 723                                 } else {
 724                                         attr->a_nvals = NULL;
 725                                         attr_free( attr );
 726                                         goto next_attr;
 727                                 }
 728                         }
 729
 730                         if ( pretty ) {
 731                                 LBER_FREE( attr->a_vals[i].bv_val );
 732                                 attr->a_vals[i] = pval;
 733                         }
 734                 }
 735                 attr->a_numvals = last = i;
 736
 737                 if ( last && attr->a_desc->ad_type->sat_equality &&
 738                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 739                 {
 740                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 741                         for ( i = 0; i < last; i++ ) {
 742                                 int             rc;
 743
 744                                 /*
 745                                  * check that each value is valid per syntax
 746                                  * and pretty if appropriate
 747                                  */
 748                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 749                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 750                                         attr->a_desc->ad_type->sat_syntax,
 751                                         attr->a_desc->ad_type->sat_equality,
 752                                         &attr->a_vals[i], &attr->a_nvals[i],
 753                                         NULL );
 754
 755                                 if ( rc != LDAP_SUCCESS ) {
 756                                         BER_BVZERO( &attr->a_nvals[i] );
 757                                         attr_free( attr );
 758                                         goto next_attr;
 759                                 }
 760                         }
 761                         BER_BVZERO( &attr->a_nvals[i] );
 762
 763                 } else {
 764                         attr->a_nvals = attr->a_vals;
 765                 }
 766                 *attrp = attr;
 767                 attrp = &attr->a_next;
 768
 769 next_attr:;
 770         }
 771
 772         return LDAP_SUCCESS;
 773 }
 774
 775 /* return 0 IFF we can retrieve the entry with ndn
 776  */
 777 int
 778 ldap_back_entry_get(
 779                 Operation               *op,
 780                 struct berval           *ndn,
 781                 ObjectClass             *oc,
 782                 AttributeDescription    *at,
 783                 int                     rw,
 784                 Entry                   **ent )
 785 {
 786         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 787
 788         ldapconn_t      *lc = NULL;
 789         int             rc,
 790                         do_not_cache;
 791         ber_tag_t       tag;
 792         struct berval   bdn;
 793         LDAPMessage     *result = NULL,
 794                         *e = NULL;
 795         char            *attr[3], **attrp = NULL;
 796         char            *filter = NULL;
 797         SlapReply       rs;
 798         int             do_retry = 1;
 799         LDAPControl     **ctrls = NULL;
 800
 801         *ent = NULL;
 802
 803         /* Tell getconn this is a privileged op */
 804         do_not_cache = op->o_do_not_cache;
 805         tag = op->o_tag;
 806         /* do not cache */
 807         op->o_do_not_cache = 1;
 808         /* ldap_back_entry_get() is an entry lookup, so it does not need
 809          * to know what the entry is being looked up for */
 810         op->o_tag = LDAP_REQ_SEARCH;
 811         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 812         op->o_do_not_cache = do_not_cache;
 813         op->o_tag = tag;
 814         if ( !rc ) {
 815                 return rs.sr_err;
 816         }
 817
 818         if ( at ) {
 819                 attrp = attr;
 820                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 821                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 822                         attr[1] = at->ad_cname.bv_val;
 823                         attr[2] = NULL;
 824
 825                 } else {
 826                         attr[0] = at->ad_cname.bv_val;
 827                         attr[1] = NULL;
 828                 }
 829         }
 830
 831         if ( oc ) {
 832                 char    *ptr;
 833
 834                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 835                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 836                 ptr = lutil_strcopy( filter, "(objectClass=" );
 837                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 838                 *ptr++ = ')';
 839                 *ptr++ = '\0';
 840         }
 841
 842 retry:
 843         ctrls = op->o_ctrls;
 844         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 845         if ( rc != LDAP_SUCCESS ) {
 846                 goto cleanup;
 847         }
 848
 849         /* TODO: timeout? */
 850         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 851                                 attrp, 0, ctrls, NULL,
 852                                 NULL, LDAP_NO_LIMIT, &result );
 853         if ( rc != LDAP_SUCCESS ) {
 854                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 855                         do_retry = 0;
 856                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 857                                 /* if the identity changed, there might be need to re-authz */
 858                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 859                                 goto retry;
 860                         }
 861                 }
 862                 goto cleanup;
 863         }
 864
 865         e = ldap_first_entry( lc->lc_ld, result );
 866         if ( e == NULL ) {
 867                 /* the entry exists, but it doesn't match the filter? */
 868                 goto cleanup;
 869         }
 870
 871         *ent = entry_alloc();
 872         if ( *ent == NULL ) {
 873                 rc = LDAP_NO_MEMORY;
 874                 goto cleanup;
 875         }
 876
 877         rc = ldap_build_entry( op, e, *ent, &bdn );
 878
 879         if ( rc != LDAP_SUCCESS ) {
 880                 entry_free( *ent );
 881                 *ent = NULL;
 882         }
 883
 884 cleanup:
 885         (void)ldap_back_controls_free( op, &rs, &ctrls );
 886
 887         if ( result ) {
 888                 ldap_msgfree( result );
 889         }
 890
 891         if ( filter ) {
 892                 op->o_tmpfree( filter, op->o_tmpmemctx );
 893         }
 894
 895         if ( lc != NULL ) {
 896                 ldap_back_release_conn( li, lc );
 897         }
 898
 899         return rc;
 900 }
 901