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                         switch ( rc ) {
 364                         case LDAP_SUCCESS:
 365                         case LDAP_INSUFFICIENT_ACCESS:
 366                                 break;
 367
 368                         default:
 369                                 if ( rc == LDAP_UNAVAILABLE ) {
 370                                         rc = rs->sr_err = LDAP_OTHER;
 371                                 } else {
 372                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 373                                 }
 374                                 goto finish;
 375                         }
 376
 377                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 378                         if ( LDAP_BACK_NOREFS( li ) ) {
 379                                 ldap_msgfree( res );
 380                                 continue;
 381                         }
 382
 383                         do_retry = 0;
 384                         rc = ldap_parse_reference( lc->lc_ld, res,
 385                                         &references, &rs->sr_ctrls, 1 );
 386
 387                         if ( rc != LDAP_SUCCESS ) {
 388                                 continue;
 389                         }
 390
 391                         /* FIXME: there MUST be at least one */
 392                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 393                                 int             cnt;
 394
 395                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 396                                         /* NO OP */ ;
 397
 398                                 /* FIXME: there MUST be at least one */
 399                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 400                                         op->o_tmpmemctx );
 401
 402                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 403                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 404                                 }
 405                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 406
 407                                 /* ignore return value by now */
 408                                 rs->sr_entry = NULL;
 409                                 ( void )send_search_reference( op, rs );
 410
 411                         } else {
 412                                 Debug( LDAP_DEBUG_ANY,
 413                                         "%s ldap_back_search: "
 414                                         "got SEARCH_REFERENCE "
 415                                         "with no referrals\n",
 416                                         op->o_log_prefix, 0, 0 );
 417                         }
 418
 419                         /* cleanup */
 420                         if ( references ) {
 421                                 ber_memvfree( (void **)references );
 422                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 423                                 rs->sr_ref = NULL;
 424                                 references = NULL;
 425                         }
 426
 427                         if ( rs->sr_ctrls ) {
 428                                 ldap_controls_free( rs->sr_ctrls );
 429                                 rs->sr_ctrls = NULL;
 430                         }
 431
 432                 } else {
 433                         char            *err = NULL;
 434
 435                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 436                                         &match.bv_val, &err,
 437                                         &references, &rs->sr_ctrls, 1 );
 438                         if ( rc != LDAP_SUCCESS ) {
 439                                 rs->sr_err = rc;
 440                         }
 441                         rs->sr_err = slap_map_api2result( rs );
 442                         if ( err ) {
 443                                 rs->sr_text = err;
 444                                 freetext = 1;
 445                         }
 446
 447                         /* RFC 4511: referrals can only appear
 448                          * if result code is LDAP_REFERRAL */
 449                         if ( references
 450                                 && references[ 0 ]
 451                                 && references[ 0 ][ 0 ] )
 452                         {
 453                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 454                                         Debug( LDAP_DEBUG_ANY,
 455                                                 "%s ldap_back_search: "
 456                                                 "got referrals with err=%d\n",
 457                                                 op->o_log_prefix,
 458                                                 rs->sr_err, 0 );
 459
 460                                 } else {
 461                                         int     cnt;
 462
 463                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 464                                                 /* NO OP */ ;
 465
 466                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 467                                                 op->o_tmpmemctx );
 468
 469                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 470                                                 /* duplicating ...*/
 471                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 472                                         }
 473                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 474                                 }
 475
 476                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 477                                 Debug( LDAP_DEBUG_ANY,
 478                                         "%s ldap_back_search: "
 479                                         "got err=%d with null "
 480                                         "or empty referrals\n",
 481                                         op->o_log_prefix,
 482                                         rs->sr_err, 0 );
 483
 484                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 485                         }
 486
 487                         if ( match.bv_val != NULL ) {
 488                                 match.bv_len = strlen( match.bv_val );
 489                         }
 490
 491                         rc = 0;
 492                         break;
 493                 }
 494
 495                 /* if needed, restore timeout */
 496                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 497                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 498                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 499                                 tv.tv_usec = 0;
 500                         }
 501                 }
 502         }
 503
 504         if ( rc == -1 && dont_retry == 0 ) {
 505                 if ( do_retry ) {
 506                         do_retry = 0;
 507                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 508                                 goto retry;
 509                         }
 510                 }
 511                 rs->sr_err = LDAP_SERVER_DOWN;
 512                 rs->sr_err = slap_map_api2result( rs );
 513                 goto finish;
 514         }
 515
 516         /*
 517          * Rewrite the matched portion of the search base, if required
 518          */
 519         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 520                 struct berval   pmatch;
 521
 522                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 523                         rs->sr_matched = pmatch.bv_val;
 524                         LDAP_FREE( match.bv_val );
 525
 526                 } else {
 527                         rs->sr_matched = match.bv_val;
 528                 }
 529         }
 530
 531         if ( rs->sr_v2ref ) {
 532                 rs->sr_err = LDAP_REFERRAL;
 533         }
 534
 535 finish:;
 536         if ( LDAP_BACK_QUARANTINE( li ) ) {
 537                 ldap_back_quarantine( op, rs );
 538         }
 539
 540         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 541                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 542         }
 543
 544 #if 0
 545         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 546         if ( rc != SLAPD_ABANDON )
 547 #endif
 548         {
 549                 send_ldap_result( op, rs );
 550         }
 551
 552         (void)ldap_back_controls_free( op, rs, &ctrls );
 553
 554         if ( rs->sr_ctrls ) {
 555                 ldap_controls_free( rs->sr_ctrls );
 556                 rs->sr_ctrls = NULL;
 557         }
 558
 559         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 560                 if ( rs->sr_matched != match.bv_val ) {
 561                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 562
 563                 } else {
 564                         LDAP_FREE( match.bv_val );
 565                 }
 566                 rs->sr_matched = save_matched;
 567         }
 568
 569         if ( rs->sr_text ) {
 570                 if ( freetext ) {
 571                         LDAP_FREE( (char *)rs->sr_text );
 572                 }
 573                 rs->sr_text = NULL;
 574         }
 575
 576         if ( rs->sr_ref ) {
 577                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 578                 rs->sr_ref = NULL;
 579         }
 580
 581         if ( references ) {
 582                 ber_memvfree( (void **)references );
 583         }
 584
 585         if ( attrs ) {
 586                 ch_free( attrs );
 587         }
 588
 589         if ( lc != NULL ) {
 590                 ldap_back_release_conn( li, lc );
 591         }
 592
 593         return rs->sr_err;
 594 }
 595
 596 static int
 597 ldap_build_entry(
 598                 Operation       *op,
 599                 LDAPMessage     *e,
 600                 Entry           *ent,
 601                 struct berval   *bdn )
 602 {
 603         struct berval   a;
 604         BerElement      ber = *e->lm_ber;
 605         Attribute       *attr, **attrp;
 606         const char      *text;
 607         int             last;
 608         char *lastb;
 609         ber_len_t len;
 610
 611         /* safe assumptions ... */
 612         assert( ent != NULL );
 613         BER_BVZERO( &ent->e_bv );
 614
 615         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 616                 return LDAP_DECODING_ERROR;
 617         }
 618
 619         /*
 620          * Note: this may fail if the target host(s) schema differs
 621          * from the one known to the meta, and a DN with unknown
 622          * attributes is returned.
 623          *
 624          * FIXME: should we log anything, or delegate to dnNormalize?
 625          */
 626         /* Note: if the distinguished values or the naming attributes
 627          * change, should we massage them as well?
 628          */
 629         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 630                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 631         {
 632                 return LDAP_INVALID_DN_SYNTAX;
 633         }
 634
 635         ent->e_attrs = NULL;
 636         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 637                 return LDAP_SUCCESS;
 638         }
 639
 640         attrp = &ent->e_attrs;
 641         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 642                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 643                 int                             i;
 644                 slap_syntax_validate_func       *validate;
 645                 slap_syntax_transform_func      *pretty;
 646
 647                 attr = attr_alloc( NULL );
 648                 if ( attr == NULL ) {
 649                         continue;
 650                 }
 651                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 652                                 != LDAP_SUCCESS )
 653                 {
 654                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 655                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 656                         {
 657                                 Debug( LDAP_DEBUG_ANY,
 658                                         "%s ldap_build_entry: "
 659                                         "slap_bv2undef_ad(%s): %s\n",
 660                                         op->o_log_prefix, a.bv_val, text );
 661                                 attr_free( attr );
 662                                 continue;
 663                         }
 664                 }
 665
 666                 /* no subschemaSubentry */
 667                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 668                         || attr->a_desc == slap_schema.si_ad_entryDN )
 669                 {
 670
 671                         /*
 672                          * We eat target's subschemaSubentry because
 673                          * a search for this value is likely not
 674                          * to resolve to the appropriate backend;
 675                          * later, the local subschemaSubentry is
 676                          * added.
 677                          *
 678                          * We also eat entryDN because the frontend
 679                          * will reattach it without checking if already
 680                          * present...
 681                          */
 682                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 683
 684                         attr_free( attr );
 685                         continue;
 686                 }
 687
 688                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 689                                 || attr->a_vals == NULL )
 690                 {
 691                         /*
 692                          * Note: attr->a_vals can be null when using
 693                          * values result filter
 694                          */
 695                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 696                 }
 697
 698                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 699                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 700
 701                 if ( !validate && !pretty ) {
 702                         attr->a_nvals = NULL;
 703                         attr_free( attr );
 704                         goto next_attr;
 705                 }
 706
 707                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) {
 708                         struct berval   pval;
 709                         int             rc;
 710
 711                         if ( pretty ) {
 712                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 713                                         &attr->a_vals[i], &pval, NULL );
 714
 715                         } else {
 716                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 717                                         &attr->a_vals[i] );
 718                         }
 719
 720                         if ( rc != LDAP_SUCCESS ) {
 721                                 ObjectClass *oc;
 722
 723                                 /* check if, by chance, it's an undefined objectClass */
 724                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 725                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 726                                 {
 727                                         ber_dupbv( &pval, &oc->soc_cname );
 728
 729                                 } else {
 730                                         attr->a_nvals = NULL;
 731                                         attr_free( attr );
 732                                         goto next_attr;
 733                                 }
 734                         }
 735
 736                         if ( pretty ) {
 737                                 LBER_FREE( attr->a_vals[i].bv_val );
 738                                 attr->a_vals[i] = pval;
 739                         }
 740                 }
 741                 attr->a_numvals = last = i;
 742
 743                 if ( last && attr->a_desc->ad_type->sat_equality &&
 744                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 745                 {
 746                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 747                         for ( i = 0; i < last; i++ ) {
 748                                 int             rc;
 749
 750                                 /*
 751                                  * check that each value is valid per syntax
 752                                  * and pretty if appropriate
 753                                  */
 754                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 755                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 756                                         attr->a_desc->ad_type->sat_syntax,
 757                                         attr->a_desc->ad_type->sat_equality,
 758                                         &attr->a_vals[i], &attr->a_nvals[i],
 759                                         NULL );
 760
 761                                 if ( rc != LDAP_SUCCESS ) {
 762                                         BER_BVZERO( &attr->a_nvals[i] );
 763                                         attr_free( attr );
 764                                         goto next_attr;
 765                                 }
 766                         }
 767                         BER_BVZERO( &attr->a_nvals[i] );
 768
 769                 } else {
 770                         attr->a_nvals = attr->a_vals;
 771                 }
 772                 *attrp = attr;
 773                 attrp = &attr->a_next;
 774
 775 next_attr:;
 776         }
 777
 778         return LDAP_SUCCESS;
 779 }
 780
 781 /* return 0 IFF we can retrieve the entry with ndn
 782  */
 783 int
 784 ldap_back_entry_get(
 785                 Operation               *op,
 786                 struct berval           *ndn,
 787                 ObjectClass             *oc,
 788                 AttributeDescription    *at,
 789                 int                     rw,
 790                 Entry                   **ent )
 791 {
 792         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 793
 794         ldapconn_t      *lc = NULL;
 795         int             rc,
 796                         do_not_cache;
 797         ber_tag_t       tag;
 798         struct berval   bdn;
 799         LDAPMessage     *result = NULL,
 800                         *e = NULL;
 801         char            *attr[3], **attrp = NULL;
 802         char            *filter = NULL;
 803         SlapReply       rs;
 804         int             do_retry = 1;
 805         LDAPControl     **ctrls = NULL;
 806
 807         *ent = NULL;
 808
 809         /* Tell getconn this is a privileged op */
 810         do_not_cache = op->o_do_not_cache;
 811         tag = op->o_tag;
 812         /* do not cache */
 813         op->o_do_not_cache = 1;
 814         /* ldap_back_entry_get() is an entry lookup, so it does not need
 815          * to know what the entry is being looked up for */
 816         op->o_tag = LDAP_REQ_SEARCH;
 817         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 818         op->o_do_not_cache = do_not_cache;
 819         op->o_tag = tag;
 820         if ( !rc ) {
 821                 return rs.sr_err;
 822         }
 823
 824         if ( at ) {
 825                 attrp = attr;
 826                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 827                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 828                         attr[1] = at->ad_cname.bv_val;
 829                         attr[2] = NULL;
 830
 831                 } else {
 832                         attr[0] = at->ad_cname.bv_val;
 833                         attr[1] = NULL;
 834                 }
 835         }
 836
 837         if ( oc ) {
 838                 char    *ptr;
 839
 840                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 841                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 842                 ptr = lutil_strcopy( filter, "(objectClass=" );
 843                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 844                 *ptr++ = ')';
 845                 *ptr++ = '\0';
 846         }
 847
 848 retry:
 849         ctrls = op->o_ctrls;
 850         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 851         if ( rc != LDAP_SUCCESS ) {
 852                 goto cleanup;
 853         }
 854
 855         /* TODO: timeout? */
 856         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 857                                 attrp, 0, ctrls, NULL,
 858                                 NULL, LDAP_NO_LIMIT, &result );
 859         if ( rc != LDAP_SUCCESS ) {
 860                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 861                         do_retry = 0;
 862                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 863                                 /* if the identity changed, there might be need to re-authz */
 864                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 865                                 goto retry;
 866                         }
 867                 }
 868                 goto cleanup;
 869         }
 870
 871         e = ldap_first_entry( lc->lc_ld, result );
 872         if ( e == NULL ) {
 873                 /* the entry exists, but it doesn't match the filter? */
 874                 goto cleanup;
 875         }
 876
 877         *ent = entry_alloc();
 878         if ( *ent == NULL ) {
 879                 rc = LDAP_NO_MEMORY;
 880                 goto cleanup;
 881         }
 882
 883         rc = ldap_build_entry( op, e, *ent, &bdn );
 884
 885         if ( rc != LDAP_SUCCESS ) {
 886                 entry_free( *ent );
 887                 *ent = NULL;
 888         }
 889
 890 cleanup:
 891         (void)ldap_back_controls_free( op, &rs, &ctrls );
 892
 893         if ( result ) {
 894                 ldap_msgfree( result );
 895         }
 896
 897         if ( filter ) {
 898                 op->o_tmpfree( filter, op->o_tmpmemctx );
 899         }
 900
 901         if ( lc != NULL ) {
 902                 ldap_back_release_conn( li, lc );
 903         }
 904
 905         return rc;
 906 }
 907