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                         /* if undef or invalid filter is not allowed,
  98                          * don't rewrite filter */
  99                         if ( LDAP_BACK_NOUNDEFFILTER( li ) ) {
 100                                 if ( filter->bv_val != op->ors_filterstr.bv_val ) {
 101                                         op->o_tmpfree( filter->bv_val, op->o_tmpmemctx );
 102                                 }
 103                                 BER_BVZERO( filter );
 104                                 gotit = -1;
 105                                 goto done;
 106                         }
 107
 108                         oldbv = &bv_undefined;
 109                         newbv = &bv_F;
 110
 111                 } else {
 112                         gotit = 0;
 113                         goto done;
 114                 }
 115
 116                 oldfilter = *filter;
 117                 filter->bv_len += newbv->bv_len - oldbv->bv_len;
 118                 if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 119                         filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 120                                         op->o_tmpmemctx );
 121
 122                         AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 123                                         op->ors_filterstr.bv_len + 1 );
 124
 125                 } else {
 126                         filter->bv_val = op->o_tmprealloc( filter->bv_val,
 127                                         filter->bv_len + 1, op->o_tmpmemctx );
 128                 }
 129
 130                 ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 131
 132                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 133                                 &ptr[ oldbv->bv_len ],
 134                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 135                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 136
 137                 ptr += newbv->bv_len;
 138                 gotit = 1;
 139         }
 140
 141 done:;
 142         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 143                         filter->bv_val, gotit, 0 );
 144
 145         return gotit;
 146 }
 147
 148 int
 149 ldap_back_search(
 150                 Operation       *op,
 151                 SlapReply       *rs )
 152 {
 153         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 154
 155         ldapconn_t      *lc = NULL;
 156         struct timeval  tv;
 157         time_t          stoptime = (time_t)(-1);
 158         LDAPMessage     *res,
 159                         *e;
 160         int             rc = 0,
 161                         msgid;
 162         struct berval   match = BER_BVNULL,
 163                         filter = BER_BVNULL;
 164         int             i;
 165         char            **attrs = NULL;
 166         int             freetext = 0;
 167         int             do_retry = 1, dont_retry = 0;
 168         LDAPControl     **ctrls = NULL;
 169         char            **references = NULL;
 170
 171         /* FIXME: shouldn't this be null? */
 172         const char      *save_matched = rs->sr_matched;
 173
 174         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 175                 return rs->sr_err;
 176         }
 177
 178         /*
 179          * FIXME: in case of values return filter, we might want
 180          * to map attrs and maybe rewrite value
 181          */
 182
 183         /* should we check return values? */
 184         if ( op->ors_deref != -1 ) {
 185                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 186                                 (void *)&op->ors_deref );
 187         }
 188
 189         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 190                 tv.tv_sec = op->ors_tlimit;
 191                 tv.tv_usec = 0;
 192                 stoptime = op->o_time + op->ors_tlimit;
 193
 194         } else {
 195                 LDAP_BACK_TV_SET( &tv );
 196         }
 197
 198         if ( op->ors_attrs ) {
 199                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 200                         /* just count attrs */ ;
 201
 202                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 203                 if ( attrs == NULL ) {
 204                         rs->sr_err = LDAP_NO_MEMORY;
 205                         rc = -1;
 206                         goto finish;
 207                 }
 208
 209                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 210                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 211                 }
 212                 attrs[ i ] = NULL;
 213         }
 214
 215         ctrls = op->o_ctrls;
 216         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 217         if ( rc != LDAP_SUCCESS ) {
 218                 goto finish;
 219         }
 220
 221         /* deal with <draft-zeilenga-ldap-t-f> filters */
 222         filter = op->ors_filterstr;
 223 retry:
 224         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 225                         op->ors_scope, filter.bv_val,
 226                         attrs, op->ors_attrsonly, ctrls, NULL,
 227                         tv.tv_sec ? &tv : NULL,
 228                         op->ors_slimit, &msgid );
 229
 230         if ( rs->sr_err != LDAP_SUCCESS ) {
 231                 switch ( rs->sr_err ) {
 232                 case LDAP_SERVER_DOWN:
 233                         if ( do_retry ) {
 234                                 do_retry = 0;
 235                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 236                                         goto retry;
 237                                 }
 238                         }
 239
 240                         if ( lc == NULL ) {
 241                                 /* reset by ldap_back_retry ... */
 242                                 rs->sr_err = slap_map_api2result( rs );
 243
 244                         } else {
 245                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 246                         }
 247
 248                         goto finish;
 249
 250                 case LDAP_FILTER_ERROR:
 251                         if (ldap_back_munge_filter( op, &filter ) > 0 ) {
 252                                 goto retry;
 253                         }
 254
 255                         /* invalid filters return success with no data */
 256                         rs->sr_err = LDAP_SUCCESS;
 257                         rs->sr_text = NULL;
 258                         goto finish;
 259
 260                 default:
 261                         rs->sr_err = slap_map_api2result( rs );
 262                         rs->sr_text = NULL;
 263                         goto finish;
 264                 }
 265         }
 266
 267         /* if needed, initialize timeout */
 268         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 269                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 270                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 271                         tv.tv_usec = 0;
 272                 }
 273         }
 274
 275         /* We pull apart the ber result, stuff it into a slapd entry, and
 276          * let send_search_entry stuff it back into ber format. Slow & ugly,
 277          * but this is necessary for version matching, and for ACL processing.
 278          */
 279
 280         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 281         {
 282                 /* check for abandon */
 283                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 284                         if ( rc > 0 ) {
 285                                 ldap_msgfree( res );
 286                         }
 287                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 288                         rc = SLAPD_ABANDON;
 289                         goto finish;
 290                 }
 291
 292                 if ( rc == 0 || rc == -2 ) {
 293                         ldap_pvt_thread_yield();
 294
 295                         /* check timeout */
 296                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 297                                 if ( rc == 0 ) {
 298                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 299                                         rs->sr_text = "Operation timed out";
 300                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 301                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 302                                         goto finish;
 303                                 }
 304
 305                         } else {
 306                                 LDAP_BACK_TV_SET( &tv );
 307                         }
 308
 309                         /* check time limit */
 310                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 311                                         && slap_get_time() > stoptime )
 312                         {
 313                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 314                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 315                                 goto finish;
 316                         }
 317                         continue;
 318
 319                 } else {
 320                         /* only touch when activity actually took place... */
 321                         if ( li->li_idle_timeout && lc ) {
 322                                 lc->lc_time = op->o_time;
 323                         }
 324
 325                         /* don't retry any more */
 326                         dont_retry = 1;
 327                 }
 328
 329
 330                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 331                         Entry           ent = { 0 };
 332                         struct berval   bdn = BER_BVNULL;
 333
 334                         do_retry = 0;
 335
 336                         e = ldap_first_entry( lc->lc_ld, res );
 337                         rc = ldap_build_entry( op, e, &ent, &bdn );
 338                         if ( rc == LDAP_SUCCESS ) {
 339                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 340                                 rs->sr_entry = &ent;
 341                                 rs->sr_attrs = op->ors_attrs;
 342                                 rs->sr_operational_attrs = NULL;
 343                                 rs->sr_flags = 0;
 344                                 rs->sr_err = LDAP_SUCCESS;
 345                                 rc = rs->sr_err = send_search_entry( op, rs );
 346                                 if ( rs->sr_ctrls ) {
 347                                         ldap_controls_free( rs->sr_ctrls );
 348                                         rs->sr_ctrls = NULL;
 349                                 }
 350                                 rs->sr_entry = NULL;
 351                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 352                                         assert( ent.e_name.bv_val != bdn.bv_val );
 353                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 354                                         BER_BVZERO( &ent.e_name );
 355                                 }
 356                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 357                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 358                                         BER_BVZERO( &ent.e_nname );
 359                                 }
 360                                 entry_clean( &ent );
 361                         }
 362                         ldap_msgfree( res );
 363                         if ( rc != LDAP_SUCCESS ) {
 364                                 if ( rc == LDAP_UNAVAILABLE ) {
 365                                         rc = rs->sr_err = LDAP_OTHER;
 366                                 } else {
 367                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 368                                 }
 369                                 goto finish;
 370                         }
 371
 372                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 373                         if ( LDAP_BACK_NOREFS( li ) ) {
 374                                 ldap_msgfree( res );
 375                                 continue;
 376                         }
 377
 378                         do_retry = 0;
 379                         rc = ldap_parse_reference( lc->lc_ld, res,
 380                                         &references, &rs->sr_ctrls, 1 );
 381
 382                         if ( rc != LDAP_SUCCESS ) {
 383                                 continue;
 384                         }
 385
 386                         /* FIXME: there MUST be at least one */
 387                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 388                                 int             cnt;
 389
 390                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 391                                         /* NO OP */ ;
 392
 393                                 /* FIXME: there MUST be at least one */
 394                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 395                                         op->o_tmpmemctx );
 396
 397                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 398                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 399                                 }
 400                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 401
 402                                 /* ignore return value by now */
 403                                 rs->sr_entry = NULL;
 404                                 ( void )send_search_reference( op, rs );
 405
 406                         } else {
 407                                 Debug( LDAP_DEBUG_ANY,
 408                                         "%s ldap_back_search: "
 409                                         "got SEARCH_REFERENCE "
 410                                         "with no referrals\n",
 411                                         op->o_log_prefix, 0, 0 );
 412                         }
 413
 414                         /* cleanup */
 415                         if ( references ) {
 416                                 ber_memvfree( (void **)references );
 417                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 418                                 rs->sr_ref = NULL;
 419                                 references = NULL;
 420                         }
 421
 422                         if ( rs->sr_ctrls ) {
 423                                 ldap_controls_free( rs->sr_ctrls );
 424                                 rs->sr_ctrls = NULL;
 425                         }
 426
 427                 } else {
 428                         char            *err = NULL;
 429
 430                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 431                                         &match.bv_val, &err,
 432                                         &references, &rs->sr_ctrls, 1 );
 433                         if ( rc != LDAP_SUCCESS ) {
 434                                 rs->sr_err = rc;
 435                         }
 436                         rs->sr_err = slap_map_api2result( rs );
 437                         if ( err ) {
 438                                 rs->sr_text = err;
 439                                 freetext = 1;
 440                         }
 441
 442                         /* RFC 4511: referrals can only appear
 443                          * if result code is LDAP_REFERRAL */
 444                         if ( references
 445                                 && references[ 0 ]
 446                                 && references[ 0 ][ 0 ] )
 447                         {
 448                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 449                                         Debug( LDAP_DEBUG_ANY,
 450                                                 "%s ldap_back_search: "
 451                                                 "got referrals with err=%d\n",
 452                                                 op->o_log_prefix,
 453                                                 rs->sr_err, 0 );
 454
 455                                 } else {
 456                                         int     cnt;
 457
 458                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 459                                                 /* NO OP */ ;
 460
 461                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 462                                                 op->o_tmpmemctx );
 463
 464                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 465                                                 /* duplicating ...*/
 466                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 467                                         }
 468                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 469                                 }
 470
 471                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 472                                 Debug( LDAP_DEBUG_ANY,
 473                                         "%s ldap_back_search: "
 474                                         "got err=%d with null "
 475                                         "or empty referrals\n",
 476                                         op->o_log_prefix,
 477                                         rs->sr_err, 0 );
 478
 479                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 480                         }
 481
 482                         if ( match.bv_val != NULL ) {
 483                                 match.bv_len = strlen( match.bv_val );
 484                         }
 485
 486                         rc = 0;
 487                         break;
 488                 }
 489
 490                 /* if needed, restore timeout */
 491                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 492                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 493                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 494                                 tv.tv_usec = 0;
 495                         }
 496                 }
 497         }
 498
 499         if ( rc == -1 && dont_retry == 0 ) {
 500                 if ( do_retry ) {
 501                         do_retry = 0;
 502                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 503                                 goto retry;
 504                         }
 505                 }
 506                 rs->sr_err = LDAP_SERVER_DOWN;
 507                 rs->sr_err = slap_map_api2result( rs );
 508                 goto finish;
 509         }
 510
 511         /*
 512          * Rewrite the matched portion of the search base, if required
 513          */
 514         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 515                 struct berval   pmatch;
 516
 517                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 518                         rs->sr_matched = pmatch.bv_val;
 519                         LDAP_FREE( match.bv_val );
 520
 521                 } else {
 522                         rs->sr_matched = match.bv_val;
 523                 }
 524         }
 525
 526         if ( rs->sr_v2ref ) {
 527                 rs->sr_err = LDAP_REFERRAL;
 528         }
 529
 530 finish:;
 531         if ( LDAP_BACK_QUARANTINE( li ) ) {
 532                 ldap_back_quarantine( op, rs );
 533         }
 534
 535         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 536                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 537         }
 538
 539 #if 0
 540         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 541         if ( rc != SLAPD_ABANDON )
 542 #endif
 543         {
 544                 send_ldap_result( op, rs );
 545         }
 546
 547         (void)ldap_back_controls_free( op, rs, &ctrls );
 548
 549         if ( rs->sr_ctrls ) {
 550                 ldap_controls_free( rs->sr_ctrls );
 551                 rs->sr_ctrls = NULL;
 552         }
 553
 554         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 555                 if ( rs->sr_matched != match.bv_val ) {
 556                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 557
 558                 } else {
 559                         LDAP_FREE( match.bv_val );
 560                 }
 561                 rs->sr_matched = save_matched;
 562         }
 563
 564         if ( rs->sr_text ) {
 565                 if ( freetext ) {
 566                         LDAP_FREE( (char *)rs->sr_text );
 567                 }
 568                 rs->sr_text = NULL;
 569         }
 570
 571         if ( rs->sr_ref ) {
 572                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 573                 rs->sr_ref = NULL;
 574         }
 575
 576         if ( references ) {
 577                 ber_memvfree( (void **)references );
 578         }
 579
 580         if ( attrs ) {
 581                 ch_free( attrs );
 582         }
 583
 584         if ( lc != NULL ) {
 585                 ldap_back_release_conn( li, lc );
 586         }
 587
 588         return rs->sr_err;
 589 }
 590
 591 static int
 592 ldap_build_entry(
 593                 Operation       *op,
 594                 LDAPMessage     *e,
 595                 Entry           *ent,
 596                 struct berval   *bdn )
 597 {
 598         struct berval   a;
 599         BerElement      ber = *e->lm_ber;
 600         Attribute       *attr, **attrp;
 601         const char      *text;
 602         int             last;
 603         char *lastb;
 604         ber_len_t len;
 605
 606         /* safe assumptions ... */
 607         assert( ent != NULL );
 608         BER_BVZERO( &ent->e_bv );
 609
 610         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 611                 return LDAP_DECODING_ERROR;
 612         }
 613
 614         /*
 615          * Note: this may fail if the target host(s) schema differs
 616          * from the one known to the meta, and a DN with unknown
 617          * attributes is returned.
 618          *
 619          * FIXME: should we log anything, or delegate to dnNormalize?
 620          */
 621         /* Note: if the distinguished values or the naming attributes
 622          * change, should we massage them as well?
 623          */
 624         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 625                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 626         {
 627                 return LDAP_INVALID_DN_SYNTAX;
 628         }
 629
 630         ent->e_attrs = NULL;
 631         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 632                 return LDAP_SUCCESS;
 633         }
 634
 635         attrp = &ent->e_attrs;
 636         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 637                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 638                 int                             i;
 639                 slap_syntax_validate_func       *validate;
 640                 slap_syntax_transform_func      *pretty;
 641
 642                 attr = attr_alloc( NULL );
 643                 if ( attr == NULL ) {
 644                         continue;
 645                 }
 646                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 647                                 != LDAP_SUCCESS )
 648                 {
 649                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 650                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 651                         {
 652                                 Debug( LDAP_DEBUG_ANY,
 653                                         "%s ldap_build_entry: "
 654                                         "slap_bv2undef_ad(%s): %s\n",
 655                                         op->o_log_prefix, a.bv_val, text );
 656                                 attr_free( attr );
 657                                 continue;
 658                         }
 659                 }
 660
 661                 /* no subschemaSubentry */
 662                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 663                         || attr->a_desc == slap_schema.si_ad_entryDN )
 664                 {
 665
 666                         /*
 667                          * We eat target's subschemaSubentry because
 668                          * a search for this value is likely not
 669                          * to resolve to the appropriate backend;
 670                          * later, the local subschemaSubentry is
 671                          * added.
 672                          *
 673                          * We also eat entryDN because the frontend
 674                          * will reattach it without checking if already
 675                          * present...
 676                          */
 677                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 678
 679                         attr_free( attr );
 680                         continue;
 681                 }
 682
 683                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 684                                 || attr->a_vals == NULL )
 685                 {
 686                         /*
 687                          * Note: attr->a_vals can be null when using
 688                          * values result filter
 689                          */
 690                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 691                 }
 692
 693                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 694                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 695
 696                 if ( !validate && !pretty ) {
 697                         attr->a_nvals = NULL;
 698                         attr_free( attr );
 699                         goto next_attr;
 700                 }
 701
 702                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) {
 703                         struct berval   pval;
 704                         int             rc;
 705
 706                         if ( pretty ) {
 707                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 708                                         &attr->a_vals[i], &pval, NULL );
 709
 710                         } else {
 711                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 712                                         &attr->a_vals[i] );
 713                         }
 714
 715                         if ( rc != LDAP_SUCCESS ) {
 716                                 ObjectClass *oc;
 717
 718                                 /* check if, by chance, it's an undefined objectClass */
 719                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 720                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 721                                 {
 722                                         ber_dupbv( &pval, &oc->soc_cname );
 723
 724                                 } else {
 725                                         attr->a_nvals = NULL;
 726                                         attr_free( attr );
 727                                         goto next_attr;
 728                                 }
 729                         }
 730
 731                         if ( pretty ) {
 732                                 LBER_FREE( attr->a_vals[i].bv_val );
 733                                 attr->a_vals[i] = pval;
 734                         }
 735                 }
 736                 attr->a_numvals = last = i;
 737
 738                 if ( last && attr->a_desc->ad_type->sat_equality &&
 739                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 740                 {
 741                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 742                         for ( i = 0; i < last; i++ ) {
 743                                 int             rc;
 744
 745                                 /*
 746                                  * check that each value is valid per syntax
 747                                  * and pretty if appropriate
 748                                  */
 749                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 750                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 751                                         attr->a_desc->ad_type->sat_syntax,
 752                                         attr->a_desc->ad_type->sat_equality,
 753                                         &attr->a_vals[i], &attr->a_nvals[i],
 754                                         NULL );
 755
 756                                 if ( rc != LDAP_SUCCESS ) {
 757                                         BER_BVZERO( &attr->a_nvals[i] );
 758                                         attr_free( attr );
 759                                         goto next_attr;
 760                                 }
 761                         }
 762                         BER_BVZERO( &attr->a_nvals[i] );
 763
 764                 } else {
 765                         attr->a_nvals = attr->a_vals;
 766                 }
 767                 *attrp = attr;
 768                 attrp = &attr->a_next;
 769
 770 next_attr:;
 771         }
 772
 773         return LDAP_SUCCESS;
 774 }
 775
 776 /* return 0 IFF we can retrieve the entry with ndn
 777  */
 778 int
 779 ldap_back_entry_get(
 780                 Operation               *op,
 781                 struct berval           *ndn,
 782                 ObjectClass             *oc,
 783                 AttributeDescription    *at,
 784                 int                     rw,
 785                 Entry                   **ent )
 786 {
 787         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 788
 789         ldapconn_t      *lc = NULL;
 790         int             rc,
 791                         do_not_cache;
 792         ber_tag_t       tag;
 793         struct berval   bdn;
 794         LDAPMessage     *result = NULL,
 795                         *e = NULL;
 796         char            *attr[3], **attrp = NULL;
 797         char            *filter = NULL;
 798         SlapReply       rs;
 799         int             do_retry = 1;
 800         LDAPControl     **ctrls = NULL;
 801
 802         *ent = NULL;
 803
 804         /* Tell getconn this is a privileged op */
 805         do_not_cache = op->o_do_not_cache;
 806         tag = op->o_tag;
 807         /* do not cache */
 808         op->o_do_not_cache = 1;
 809         /* ldap_back_entry_get() is an entry lookup, so it does not need
 810          * to know what the entry is being looked up for */
 811         op->o_tag = LDAP_REQ_SEARCH;
 812         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 813         op->o_do_not_cache = do_not_cache;
 814         op->o_tag = tag;
 815         if ( !rc ) {
 816                 return rs.sr_err;
 817         }
 818
 819         if ( at ) {
 820                 attrp = attr;
 821                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 822                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 823                         attr[1] = at->ad_cname.bv_val;
 824                         attr[2] = NULL;
 825
 826                 } else {
 827                         attr[0] = at->ad_cname.bv_val;
 828                         attr[1] = NULL;
 829                 }
 830         }
 831
 832         if ( oc ) {
 833                 char    *ptr;
 834
 835                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 836                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 837                 ptr = lutil_strcopy( filter, "(objectClass=" );
 838                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 839                 *ptr++ = ')';
 840                 *ptr++ = '\0';
 841         }
 842
 843 retry:
 844         ctrls = op->o_ctrls;
 845         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 846         if ( rc != LDAP_SUCCESS ) {
 847                 goto cleanup;
 848         }
 849
 850         /* TODO: timeout? */
 851         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 852                                 attrp, 0, ctrls, NULL,
 853                                 NULL, LDAP_NO_LIMIT, &result );
 854         if ( rc != LDAP_SUCCESS ) {
 855                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 856                         do_retry = 0;
 857                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 858                                 /* if the identity changed, there might be need to re-authz */
 859                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 860                                 goto retry;
 861                         }
 862                 }
 863                 goto cleanup;
 864         }
 865
 866         e = ldap_first_entry( lc->lc_ld, result );
 867         if ( e == NULL ) {
 868                 /* the entry exists, but it doesn't match the filter? */
 869                 goto cleanup;
 870         }
 871
 872         *ent = entry_alloc();
 873         if ( *ent == NULL ) {
 874                 rc = LDAP_NO_MEMORY;
 875                 goto cleanup;
 876         }
 877
 878         rc = ldap_build_entry( op, e, *ent, &bdn );
 879
 880         if ( rc != LDAP_SUCCESS ) {
 881                 entry_free( *ent );
 882                 *ent = NULL;
 883         }
 884
 885 cleanup:
 886         (void)ldap_back_controls_free( op, &rs, &ctrls );
 887
 888         if ( result ) {
 889                 ldap_msgfree( result );
 890         }
 891
 892         if ( filter ) {
 893                 op->o_tmpfree( filter, op->o_tmpmemctx );
 894         }
 895
 896         if ( lc != NULL ) {
 897                 ldap_back_release_conn( li, lc );
 898         }
 899
 900         return rc;
 901 }
 902