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                 oldfilter = *filter;
 106                 if ( newbv->bv_len > oldbv->bv_len ) {
 107                         filter->bv_len += newbv->bv_len - oldbv->bv_len;
 108                         if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 109                                 filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 110                                                 op->o_tmpmemctx );
 111
 112                                 AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 113                                                 op->ors_filterstr.bv_len + 1 );
 114
 115                         } else {
 116                                 filter->bv_val = op->o_tmprealloc( filter->bv_val,
 117                                                 filter->bv_len + 1, op->o_tmpmemctx );
 118                         }
 119
 120                         ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 121                 }
 122
 123                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 124                                 &ptr[ oldbv->bv_len ],
 125                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 126                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 127
 128                 ptr += newbv->bv_len;
 129                 gotit = 1;
 130         }
 131
 132 done:;
 133         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 134                         filter->bv_val, gotit, 0 );
 135
 136         return gotit;
 137 }
 138
 139 int
 140 ldap_back_search(
 141                 Operation       *op,
 142                 SlapReply       *rs )
 143 {
 144         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 145
 146         ldapconn_t      *lc = NULL;
 147         struct timeval  tv;
 148         time_t          stoptime = (time_t)(-1);
 149         LDAPMessage     *res,
 150                         *e;
 151         int             rc = 0,
 152                         msgid;
 153         struct berval   match = BER_BVNULL,
 154                         filter = BER_BVNULL;
 155         int             free_filter = 0;
 156         int             i;
 157         char            **attrs = NULL;
 158         int             freetext = 0;
 159         int             do_retry = 1, dont_retry = 0;
 160         LDAPControl     **ctrls = NULL;
 161         char            **references = NULL;
 162
 163         /* FIXME: shouldn't this be null? */
 164         const char      *save_matched = rs->sr_matched;
 165
 166         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 167                 return rs->sr_err;
 168         }
 169
 170         /*
 171          * FIXME: in case of values return filter, we might want
 172          * to map attrs and maybe rewrite value
 173          */
 174
 175         /* should we check return values? */
 176         if ( op->ors_deref != -1 ) {
 177                 ldap_set_option( lc->lc_ld, LDAP_OPT_DEREF,
 178                                 (void *)&op->ors_deref );
 179         }
 180
 181         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 182                 tv.tv_sec = op->ors_tlimit;
 183                 tv.tv_usec = 0;
 184                 stoptime = op->o_time + op->ors_tlimit;
 185
 186         } else {
 187                 LDAP_BACK_TV_SET( &tv );
 188         }
 189
 190         if ( op->ors_attrs ) {
 191                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 192                         /* just count attrs */ ;
 193
 194                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 195                 if ( attrs == NULL ) {
 196                         rs->sr_err = LDAP_NO_MEMORY;
 197                         rc = -1;
 198                         goto finish;
 199                 }
 200
 201                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 202                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 203                 }
 204                 attrs[ i ] = NULL;
 205         }
 206
 207         ctrls = op->o_ctrls;
 208         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 209                 li->li_version, &li->li_idassert, op, rs, &ctrls );
 210         if ( rc != LDAP_SUCCESS ) {
 211                 goto finish;
 212         }
 213
 214         /* deal with <draft-zeilenga-ldap-t-f> filters */
 215         filter = op->ors_filterstr;
 216 retry:
 217         rs->sr_err = ldap_search_ext( lc->lc_ld, op->o_req_dn.bv_val,
 218                         op->ors_scope, filter.bv_val,
 219                         attrs, op->ors_attrsonly, ctrls, NULL,
 220                         tv.tv_sec ? &tv : NULL,
 221                         op->ors_slimit, &msgid );
 222
 223         if ( rs->sr_err != LDAP_SUCCESS ) {
 224                 switch ( rs->sr_err ) {
 225                 case LDAP_SERVER_DOWN:
 226                         if ( do_retry ) {
 227                                 do_retry = 0;
 228                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 229                                         goto retry;
 230                                 }
 231                         }
 232
 233                         if ( lc == NULL ) {
 234                                 /* reset by ldap_back_retry ... */
 235                                 rs->sr_err = slap_map_api2result( rs );
 236
 237                         } else {
 238                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 239                         }
 240
 241                         goto finish;
 242
 243                 case LDAP_FILTER_ERROR:
 244                         if ( ldap_back_munge_filter( op, &filter ) ) {
 245                                 free_filter = 1;
 246                                 goto retry;
 247                         }
 248
 249                         /* invalid filters return success with no data */
 250                         rs->sr_err = LDAP_SUCCESS;
 251                         rs->sr_text = NULL;
 252                         goto finish;
 253
 254                 default:
 255                         rs->sr_err = slap_map_api2result( rs );
 256                         rs->sr_text = NULL;
 257                         goto finish;
 258                 }
 259         }
 260
 261         /* if needed, initialize timeout */
 262         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 263                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 264                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 265                         tv.tv_usec = 0;
 266                 }
 267         }
 268
 269         /* We pull apart the ber result, stuff it into a slapd entry, and
 270          * let send_search_entry stuff it back into ber format. Slow & ugly,
 271          * but this is necessary for version matching, and for ACL processing.
 272          */
 273
 274         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 275         {
 276                 /* check for abandon */
 277                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 278                         if ( rc > 0 ) {
 279                                 ldap_msgfree( res );
 280                         }
 281                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 282                         rc = SLAPD_ABANDON;
 283                         goto finish;
 284                 }
 285
 286                 if ( rc == 0 || rc == -2 ) {
 287                         ldap_pvt_thread_yield();
 288
 289                         /* check timeout */
 290                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 291                                 if ( rc == 0 ) {
 292                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 293                                         rs->sr_text = "Operation timed out";
 294                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 295                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 296                                         goto finish;
 297                                 }
 298
 299                         } else {
 300                                 LDAP_BACK_TV_SET( &tv );
 301                         }
 302
 303                         /* check time limit */
 304                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 305                                         && slap_get_time() > stoptime )
 306                         {
 307                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 308                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 309                                 goto finish;
 310                         }
 311                         continue;
 312
 313                 } else {
 314                         /* only touch when activity actually took place... */
 315                         if ( li->li_idle_timeout && lc ) {
 316                                 lc->lc_time = op->o_time;
 317                         }
 318
 319                         /* don't retry any more */
 320                         dont_retry = 1;
 321                 }
 322
 323
 324                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 325                         Entry           ent = { 0 };
 326                         struct berval   bdn = BER_BVNULL;
 327
 328                         do_retry = 0;
 329
 330                         e = ldap_first_entry( lc->lc_ld, res );
 331                         rc = ldap_build_entry( op, e, &ent, &bdn );
 332                         if ( rc == LDAP_SUCCESS ) {
 333                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 334                                 rs->sr_entry = &ent;
 335                                 rs->sr_attrs = op->ors_attrs;
 336                                 rs->sr_operational_attrs = NULL;
 337                                 rs->sr_flags = 0;
 338                                 rs->sr_err = LDAP_SUCCESS;
 339                                 rc = rs->sr_err = send_search_entry( op, rs );
 340                                 if ( rs->sr_ctrls ) {
 341                                         ldap_controls_free( rs->sr_ctrls );
 342                                         rs->sr_ctrls = NULL;
 343                                 }
 344                                 rs->sr_entry = NULL;
 345                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 346                                         assert( ent.e_name.bv_val != bdn.bv_val );
 347                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 348                                         BER_BVZERO( &ent.e_name );
 349                                 }
 350                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 351                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 352                                         BER_BVZERO( &ent.e_nname );
 353                                 }
 354                                 entry_clean( &ent );
 355                         }
 356                         ldap_msgfree( res );
 357                         if ( rc != LDAP_SUCCESS ) {
 358                                 if ( rc == LDAP_UNAVAILABLE ) {
 359                                         rc = rs->sr_err = LDAP_OTHER;
 360                                 } else {
 361                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 362                                 }
 363                                 goto finish;
 364                         }
 365
 366                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 367                         do_retry = 0;
 368                         rc = ldap_parse_reference( lc->lc_ld, res,
 369                                         &references, &rs->sr_ctrls, 1 );
 370
 371                         if ( rc != LDAP_SUCCESS ) {
 372                                 continue;
 373                         }
 374
 375                         /* FIXME: there MUST be at least one */
 376                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 377                                 int             cnt;
 378
 379                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 380                                         /* NO OP */ ;
 381
 382                                 /* FIXME: there MUST be at least one */
 383                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 384                                         op->o_tmpmemctx );
 385
 386                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 387                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 388                                 }
 389                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 390
 391                                 /* ignore return value by now */
 392                                 rs->sr_entry = NULL;
 393                                 ( void )send_search_reference( op, rs );
 394
 395                         } else {
 396                                 Debug( LDAP_DEBUG_ANY,
 397                                         "%s ldap_back_search: "
 398                                         "got SEARCH_REFERENCE "
 399                                         "with no referrals\n",
 400                                         op->o_log_prefix, 0, 0 );
 401                         }
 402
 403                         /* cleanup */
 404                         if ( references ) {
 405                                 ber_memvfree( (void **)references );
 406                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 407                                 rs->sr_ref = NULL;
 408                                 references = NULL;
 409                         }
 410
 411                         if ( rs->sr_ctrls ) {
 412                                 ldap_controls_free( rs->sr_ctrls );
 413                                 rs->sr_ctrls = NULL;
 414                         }
 415
 416                 } else {
 417                         char            *err = NULL;
 418
 419                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 420                                         &match.bv_val, &err,
 421                                         &references, &rs->sr_ctrls, 1 );
 422                         if ( rc != LDAP_SUCCESS ) {
 423                                 rs->sr_err = rc;
 424                         }
 425                         rs->sr_err = slap_map_api2result( rs );
 426                         if ( err ) {
 427                                 rs->sr_text = err;
 428                                 freetext = 1;
 429                         }
 430
 431                         /* RFC 4511: referrals can only appear
 432                          * if result code is LDAP_REFERRAL */
 433                         if ( references
 434                                 && references[ 0 ]
 435                                 && references[ 0 ][ 0 ] )
 436                         {
 437                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 438                                         Debug( LDAP_DEBUG_ANY,
 439                                                 "%s ldap_back_search: "
 440                                                 "got referrals with err=%d\n",
 441                                                 op->o_log_prefix,
 442                                                 rs->sr_err, 0 );
 443
 444                                 } else {
 445                                         int     cnt;
 446
 447                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 448                                                 /* NO OP */ ;
 449
 450                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 451                                                 op->o_tmpmemctx );
 452
 453                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 454                                                 /* duplicating ...*/
 455                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 456                                         }
 457                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 458                                 }
 459
 460                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 461                                 Debug( LDAP_DEBUG_ANY,
 462                                         "%s ldap_back_search: "
 463                                         "got err=%d with null "
 464                                         "or empty referrals\n",
 465                                         op->o_log_prefix,
 466                                         rs->sr_err, 0 );
 467
 468                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 469                         }
 470
 471                         if ( match.bv_val != NULL ) {
 472 #ifndef LDAP_NULL_IS_NULL
 473                                 if ( match.bv_val[ 0 ] == '\0' ) {
 474                                         LDAP_FREE( match.bv_val );
 475                                         BER_BVZERO( &match );
 476                                 } else
 477 #endif /* LDAP_NULL_IS_NULL */
 478                                 {
 479                                         match.bv_len = strlen( match.bv_val );
 480                                 }
 481                         }
 482 #ifndef LDAP_NULL_IS_NULL
 483                         if ( rs->sr_text != NULL && rs->sr_text[ 0 ] == '\0' ) {
 484                                 LDAP_FREE( (char *)rs->sr_text );
 485                                 rs->sr_text = NULL;
 486                         }
 487 #endif /* LDAP_NULL_IS_NULL */
 488
 489                         rc = 0;
 490                         break;
 491                 }
 492
 493                 /* if needed, restore timeout */
 494                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 495                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 496                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 497                                 tv.tv_usec = 0;
 498                         }
 499                 }
 500         }
 501
 502         if ( rc == -1 && dont_retry == 0 ) {
 503                 if ( do_retry ) {
 504                         do_retry = 0;
 505                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 506                                 goto retry;
 507                         }
 508                 }
 509                 rs->sr_err = LDAP_SERVER_DOWN;
 510                 rs->sr_err = slap_map_api2result( rs );
 511                 goto finish;
 512         }
 513
 514         /*
 515          * Rewrite the matched portion of the search base, if required
 516          */
 517         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 518                 struct berval   pmatch;
 519
 520                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 521                         rs->sr_matched = pmatch.bv_val;
 522                         LDAP_FREE( match.bv_val );
 523
 524                 } else {
 525                         rs->sr_matched = match.bv_val;
 526                 }
 527         }
 528
 529         if ( rs->sr_v2ref ) {
 530                 rs->sr_err = LDAP_REFERRAL;
 531         }
 532
 533 finish:;
 534         if ( LDAP_BACK_QUARANTINE( li ) ) {
 535                 ldap_back_quarantine( op, rs );
 536         }
 537
 538 #if 0
 539         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 540         if ( rc != SLAPD_ABANDON )
 541 #endif
 542         {
 543                 send_ldap_result( op, rs );
 544         }
 545
 546         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 547
 548         if ( rs->sr_ctrls ) {
 549                 ldap_controls_free( rs->sr_ctrls );
 550                 rs->sr_ctrls = NULL;
 551         }
 552
 553         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 554                 if ( rs->sr_matched != match.bv_val ) {
 555                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 556
 557                 } else {
 558                         LDAP_FREE( match.bv_val );
 559                 }
 560                 rs->sr_matched = save_matched;
 561         }
 562
 563         if ( free_filter ) {
 564                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 565         }
 566
 567         if ( rs->sr_text ) {
 568                 if ( freetext ) {
 569                         LDAP_FREE( (char *)rs->sr_text );
 570                 }
 571                 rs->sr_text = NULL;
 572         }
 573
 574         if ( rs->sr_ref ) {
 575                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 576                 rs->sr_ref = NULL;
 577         }
 578
 579         if ( references ) {
 580                 ber_memvfree( (void **)references );
 581         }
 582
 583         if ( attrs ) {
 584                 ch_free( attrs );
 585         }
 586
 587         if ( lc != NULL ) {
 588                 ldap_back_release_conn( li, lc );
 589         }
 590
 591         return rs->sr_err;
 592 }
 593
 594 static int
 595 ldap_build_entry(
 596                 Operation       *op,
 597                 LDAPMessage     *e,
 598                 Entry           *ent,
 599                 struct berval   *bdn )
 600 {
 601         struct berval   a;
 602         BerElement      ber = *e->lm_ber;
 603         Attribute       *attr, **attrp;
 604         const char      *text;
 605         int             last;
 606         char *lastb;
 607         ber_len_t len;
 608
 609         /* safe assumptions ... */
 610         assert( ent != NULL );
 611         BER_BVZERO( &ent->e_bv );
 612
 613         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 614                 return LDAP_DECODING_ERROR;
 615         }
 616
 617         /*
 618          * Note: this may fail if the target host(s) schema differs
 619          * from the one known to the meta, and a DN with unknown
 620          * attributes is returned.
 621          *
 622          * FIXME: should we log anything, or delegate to dnNormalize?
 623          */
 624         /* Note: if the distinguished values or the naming attributes
 625          * change, should we massage them as well?
 626          */
 627         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 628                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 629         {
 630                 return LDAP_INVALID_DN_SYNTAX;
 631         }
 632
 633         ent->e_attrs = NULL;
 634         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 635                 return LDAP_SUCCESS;
 636         }
 637
 638         attrp = &ent->e_attrs;
 639         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 640                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 641                 int                             i;
 642                 slap_syntax_validate_func       *validate;
 643                 slap_syntax_transform_func      *pretty;
 644
 645                 attr = (Attribute *)ch_malloc( sizeof( Attribute ) );
 646                 if ( attr == NULL ) {
 647                         continue;
 648                 }
 649                 attr->a_flags = 0;
 650                 attr->a_next = 0;
 651                 attr->a_desc = NULL;
 652                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 653                                 != LDAP_SUCCESS )
 654                 {
 655                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 656                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 657                         {
 658                                 Debug( LDAP_DEBUG_ANY,
 659                                         "%s ldap_build_entry: "
 660                                         "slap_bv2undef_ad(%s): %s\n",
 661                                         op->o_log_prefix, a.bv_val, text );
 662                                 ch_free( attr );
 663                                 continue;
 664                         }
 665                 }
 666
 667                 /* no subschemaSubentry */
 668                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 669                         || attr->a_desc == slap_schema.si_ad_entryDN )
 670                 {
 671
 672                         /*
 673                          * We eat target's subschemaSubentry because
 674                          * a search for this value is likely not
 675                          * to resolve to the appropriate backend;
 676                          * later, the local subschemaSubentry is
 677                          * added.
 678                          *
 679                          * We also eat entryDN because the frontend
 680                          * will reattach it without checking if already
 681                          * present...
 682                          */
 683                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 684
 685                         ch_free( attr );
 686                         continue;
 687                 }
 688
 689                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 690                                 || attr->a_vals == NULL )
 691                 {
 692                         /*
 693                          * Note: attr->a_vals can be null when using
 694                          * values result filter
 695                          */
 696                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 697                         last = 0;
 698
 699                 } else {
 700                         for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); last++ )
 701                                 /* just count vals */ ;
 702                 }
 703
 704                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 705                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 706
 707                 if ( !validate && !pretty ) {
 708                         attr->a_nvals = NULL;
 709                         attr_free( attr );
 710                         goto next_attr;
 711                 }
 712
 713                 for ( i = 0; i < last; i++ ) {
 714                         struct berval   pval;
 715                         int             rc;
 716
 717                         if ( pretty ) {
 718                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 719                                         &attr->a_vals[i], &pval, NULL );
 720
 721                         } else {
 722                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 723                                         &attr->a_vals[i] );
 724                         }
 725
 726                         if ( rc != LDAP_SUCCESS ) {
 727                                 /* check if, by chance, it's an undefined objectClass */
 728                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 729                                                 oc_bvfind_undef( &attr->a_vals[i] ) != NULL )
 730                                 {
 731                                         ber_dupbv( &pval, &attr->a_vals[i] );
 732
 733                                 } else {
 734                                         attr->a_nvals = NULL;
 735                                         attr_free( attr );
 736                                         goto next_attr;
 737                                 }
 738                         }
 739
 740                         if ( pretty ) {
 741                                 LBER_FREE( attr->a_vals[i].bv_val );
 742                                 attr->a_vals[i] = pval;
 743                         }
 744                 }
 745
 746                 if ( last && attr->a_desc->ad_type->sat_equality &&
 747                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 748                 {
 749                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 750                         for ( i = 0; i < last; i++ ) {
 751                                 int             rc;
 752
 753                                 /*
 754                                  * check that each value is valid per syntax
 755                                  * and pretty if appropriate
 756                                  */
 757                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 758                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 759                                         attr->a_desc->ad_type->sat_syntax,
 760                                         attr->a_desc->ad_type->sat_equality,
 761                                         &attr->a_vals[i], &attr->a_nvals[i],
 762                                         NULL );
 763
 764                                 if ( rc != LDAP_SUCCESS ) {
 765                                         BER_BVZERO( &attr->a_nvals[i] );
 766                                         ch_free( attr );
 767                                         goto next_attr;
 768                                 }
 769                         }
 770                         BER_BVZERO( &attr->a_nvals[i] );
 771
 772                 } else {
 773                         attr->a_nvals = attr->a_vals;
 774                 }
 775                 *attrp = attr;
 776                 attrp = &attr->a_next;
 777
 778 next_attr:;
 779         }
 780
 781         return LDAP_SUCCESS;
 782 }
 783
 784 /* return 0 IFF we can retrieve the entry with ndn
 785  */
 786 int
 787 ldap_back_entry_get(
 788                 Operation               *op,
 789                 struct berval           *ndn,
 790                 ObjectClass             *oc,
 791                 AttributeDescription    *at,
 792                 int                     rw,
 793                 Entry                   **ent )
 794 {
 795         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 796
 797         ldapconn_t      *lc = NULL;
 798         int             rc = 1,
 799                         do_not_cache;
 800         struct berval   bdn;
 801         LDAPMessage     *result = NULL,
 802                         *e = NULL;
 803         char            *attr[3], **attrp = NULL;
 804         char            *filter = NULL;
 805         SlapReply       rs;
 806         int             do_retry = 1;
 807         LDAPControl     **ctrls = NULL;
 808
 809         *ent = NULL;
 810
 811         /* Tell getconn this is a privileged op */
 812         do_not_cache = op->o_do_not_cache;
 813         op->o_do_not_cache = 1;
 814         if ( !ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 815                 op->o_do_not_cache = do_not_cache;
 816                 return rs.sr_err;
 817         }
 818         op->o_do_not_cache = do_not_cache;
 819
 820         if ( at ) {
 821                 attrp = attr;
 822                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 823                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 824                         attr[1] = at->ad_cname.bv_val;
 825                         attr[2] = NULL;
 826
 827                 } else {
 828                         attr[0] = at->ad_cname.bv_val;
 829                         attr[1] = NULL;
 830                 }
 831         }
 832
 833         if ( oc ) {
 834                 char    *ptr;
 835
 836                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 837                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 838                 ptr = lutil_strcopy( filter, "(objectClass=" );
 839                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 840                 *ptr++ = ')';
 841                 *ptr++ = '\0';
 842         }
 843
 844 retry:
 845         ctrls = op->o_ctrls;
 846         rc = ldap_back_proxy_authz_ctrl( &lc->lc_bound_ndn,
 847                 li->li_version, &li->li_idassert, op, &rs, &ctrls );
 848         if ( rc != LDAP_SUCCESS ) {
 849                 goto cleanup;
 850         }
 851
 852         /* TODO: timeout? */
 853         rc = ldap_search_ext_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 854                                 attrp, 0, ctrls, NULL,
 855                                 NULL, LDAP_NO_LIMIT, &result );
 856         if ( rc != LDAP_SUCCESS ) {
 857                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 858                         do_retry = 0;
 859                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 860                                 /* if the identity changed, there might be need to re-authz */
 861                                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 862                                 goto retry;
 863                         }
 864                 }
 865                 goto cleanup;
 866         }
 867
 868         e = ldap_first_entry( lc->lc_ld, result );
 869         if ( e == NULL ) {
 870                 /* the entry exists, but it doesn't match the filter? */
 871                 goto cleanup;
 872         }
 873
 874         *ent = ch_calloc( 1, sizeof( Entry ) );
 875         if ( *ent == NULL ) {
 876                 rc = LDAP_NO_MEMORY;
 877                 goto cleanup;
 878         }
 879
 880         rc = ldap_build_entry( op, e, *ent, &bdn );
 881
 882         if ( rc != LDAP_SUCCESS ) {
 883                 entry_free( *ent );
 884                 *ent = NULL;
 885         }
 886
 887 cleanup:
 888         (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 889
 890         if ( result ) {
 891                 ldap_msgfree( result );
 892         }
 893
 894         if ( filter ) {
 895                 op->o_tmpfree( filter, op->o_tmpmemctx );
 896         }
 897
 898         if ( lc != NULL ) {
 899                 ldap_back_release_conn( li, lc );
 900         }
 901
 902         return rc;
 903 }
 904