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 1999-2017 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 #include "../../../libraries/liblber/lber-int.h"
  35
  36 #include "lutil.h"
  37
  38 static int
  39 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  40          struct berval *bdn, int remove_unknown_schema );
  41
  42
  43 static ObjectClass *
  44 oc_bvfind_undef_ex( struct berval *ocname, int flag )
  45 {
  46         ObjectClass     *oc     = oc_bvfind( ocname );
  47
  48         if ( oc || flag ) {
  49                 /* oc defined or remove-unknown-schema flag set */
  50                 return oc;
  51         }
  52
  53         return oc_bvfind_undef( ocname );
  54 }
  55
  56
  57 /*
  58  * replaces (&) with (objectClass=*) and (|) with (!(objectClass=*))
  59  * as the best replacement for RFC 4526 absolute true/absolute false
  60  * filters; the only difference (AFAIK) is that they require search
  61  * access to objectClass.
  62  *
  63  * filter->bv_val may be alloc'd on the thread's slab, if equal to
  64  * op->ors_filterstr.bv_val, or realloc'd on the thread's slab otherwise.
  65  */
  66 static int
  67 ldap_back_munge_filter(
  68         Operation       *op,
  69         struct berval   *filter )
  70 {
  71         char *ptr;
  72         int gotit = 0;
  73
  74         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  75                         filter->bv_val, 0, 0 );
  76
  77         for ( ptr = strchr( filter->bv_val, '(' );
  78                         ptr;
  79                         ptr = strchr( ptr, '(' ) )
  80         {
  81                 static struct berval
  82                         bv_t = BER_BVC( "(&)" ),
  83                         bv_f = BER_BVC( "(|)" ),
  84                         bv_T = BER_BVC( "(objectClass=*)" ),
  85                         bv_F = BER_BVC( "(!(objectClass=*))" );
  86                 struct berval *oldbv = NULL,
  87                         *newbv = NULL,
  88                         oldfilter = BER_BVNULL;
  89
  90                 if ( ptr[2] != ')' ) {
  91                         ptr++;
  92                         continue;
  93                 }
  94
  95                 switch ( ptr[1] ) {
  96                 case '&':
  97                         oldbv = &bv_t;
  98                         newbv = &bv_T;
  99                         break;
 100
 101                 case '|':
 102                         oldbv = &bv_f;
 103                         newbv = &bv_F;
 104                         break;
 105
 106                 default:
 107                         /* should be an error */
 108                         continue;
 109                 }
 110
 111                 oldfilter = *filter;
 112                 filter->bv_len += newbv->bv_len - oldbv->bv_len;
 113                 if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 114                         filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 115                                         op->o_tmpmemctx );
 116
 117                         AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 118                                         ptr - oldfilter.bv_val );
 119
 120                 } else {
 121                         filter->bv_val = op->o_tmprealloc( filter->bv_val,
 122                                         filter->bv_len + 1, op->o_tmpmemctx );
 123                 }
 124
 125                 ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 126
 127                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 128                                 &ptr[ oldbv->bv_len ],
 129                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 130                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 131
 132                 ptr += newbv->bv_len;
 133
 134                 gotit++;
 135         }
 136
 137         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 138                         filter->bv_val, gotit, 0 );
 139
 140         return gotit;
 141 }
 142
 143 int
 144 ldap_back_search(
 145                 Operation       *op,
 146                 SlapReply       *rs )
 147 {
 148         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 149
 150         ldapconn_t      *lc = NULL;
 151         struct timeval  tv;
 152         time_t          stoptime = (time_t)(-1);
 153         LDAPMessage     *res,
 154                         *e;
 155         int             rc = 0,
 156                         msgid;
 157         struct berval   match = BER_BVNULL,
 158                         filter = BER_BVNULL;
 159         int             i, x;
 160         char            **attrs = NULL;
 161         int             freetext = 0, filter_undef = 0;
 162         int             do_retry = 1, dont_retry = 0;
 163         LDAPControl     **ctrls = NULL;
 164         char            **references = NULL;
 165         int             remove_unknown_schema =
 166                                  LDAP_BACK_OMIT_UNKNOWN_SCHEMA (li);
 167
 168         rs_assert_ready( rs );
 169         rs->sr_flags &= ~REP_ENTRY_MASK; /* paranoia, we can set rs = non-entry */
 170
 171         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 172                 return rs->sr_err;
 173         }
 174
 175         /*
 176          * FIXME: in case of values return filter, we might want
 177          * to map attrs and maybe rewrite value
 178          */
 179
 180         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 181                 tv.tv_sec = op->ors_tlimit;
 182                 tv.tv_usec = 0;
 183                 stoptime = op->o_time + op->ors_tlimit;
 184
 185         } else {
 186                 LDAP_BACK_TV_SET( &tv );
 187         }
 188
 189         i = 0;
 190         if ( op->ors_attrs ) {
 191                 for ( ; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 192                         /* just count attrs */ ;
 193         }
 194
 195         x = 0;
 196         if ( op->o_bd->be_extra_anlist ) {
 197                 for ( ; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++ )
 198                         /* just count attrs */ ;
 199         }
 200
 201         if ( i > 0 || x > 0 ) {
 202                 int j = 0;
 203
 204                 attrs = op->o_tmpalloc( ( i + x + 1 )*sizeof( char * ),
 205                         op->o_tmpmemctx );
 206                 if ( attrs == NULL ) {
 207                         rs->sr_err = LDAP_NO_MEMORY;
 208                         rc = -1;
 209                         goto finish;
 210                 }
 211
 212                 if ( i > 0 ) {
 213                         for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++, j++ ) {
 214                                 attrs[ j ] = op->ors_attrs[i].an_name.bv_val;
 215                         }
 216                 }
 217
 218                 if ( x > 0 ) {
 219                         for ( x = 0; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++, j++ ) {
 220                                 if ( op->o_bd->be_extra_anlist[x].an_desc &&
 221                                         ad_inlist( op->o_bd->be_extra_anlist[x].an_desc, op->ors_attrs ) )
 222                                 {
 223                                         continue;
 224                                 }
 225
 226                                 attrs[ j ] = op->o_bd->be_extra_anlist[x].an_name.bv_val;
 227                         }
 228                 }
 229
 230                 attrs[ j ] = NULL;
 231         }
 232
 233         ctrls = op->o_ctrls;
 234         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 235         if ( rc != LDAP_SUCCESS ) {
 236                 goto finish;
 237         }
 238
 239         /* deal with <draft-zeilenga-ldap-t-f> filters */
 240         filter = op->ors_filterstr;
 241 retry:
 242         /* this goes after retry because ldap_back_munge_filter()
 243          * optionally replaces RFC 4526 T-F filters (&) (|)
 244          * if already computed, they will be re-installed
 245          * by filter2bv_undef_x() later */
 246         if ( !LDAP_BACK_T_F( li ) ) {
 247                 ldap_back_munge_filter( op, &filter );
 248         }
 249
 250         rs->sr_err = ldap_pvt_search( lc->lc_ld, op->o_req_dn.bv_val,
 251                         op->ors_scope, filter.bv_val,
 252                         attrs, op->ors_attrsonly, ctrls, NULL,
 253                         tv.tv_sec ? &tv : NULL,
 254                         op->ors_slimit, op->ors_deref, &msgid );
 255
 256         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
 257         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_SEARCH ], 1 );
 258         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
 259
 260         if ( rs->sr_err != LDAP_SUCCESS ) {
 261                 switch ( rs->sr_err ) {
 262                 case LDAP_SERVER_DOWN:
 263                         if ( do_retry ) {
 264                                 do_retry = 0;
 265                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 266                                         goto retry;
 267                                 }
 268                         }
 269
 270                         if ( lc == NULL ) {
 271                                 /* reset by ldap_back_retry ... */
 272                                 rs->sr_err = slap_map_api2result( rs );
 273
 274                         } else {
 275                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 276                         }
 277
 278                         goto finish;
 279
 280                 case LDAP_FILTER_ERROR:
 281                         /* first try? */
 282                         if ( !filter_undef &&
 283                                 strstr( filter.bv_val, "(?" ) &&
 284                                 !LDAP_BACK_NOUNDEFFILTER( li ) )
 285                         {
 286                                 BER_BVZERO( &filter );
 287                                 filter2bv_undef_x( op, op->ors_filter, 1, &filter );
 288                                 filter_undef = 1;
 289                                 goto retry;
 290                         }
 291
 292                         /* invalid filters return success with no data */
 293                         rs->sr_err = LDAP_SUCCESS;
 294                         rs->sr_text = NULL;
 295                         goto finish;
 296
 297                 default:
 298                         rs->sr_err = slap_map_api2result( rs );
 299                         rs->sr_text = NULL;
 300                         goto finish;
 301                 }
 302         }
 303
 304         /* if needed, initialize timeout */
 305         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 306                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 307                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 308                         tv.tv_usec = 0;
 309                 }
 310         }
 311
 312         /* We pull apart the ber result, stuff it into a slapd entry, and
 313          * let send_search_entry stuff it back into ber format. Slow & ugly,
 314          * but this is necessary for version matching, and for ACL processing.
 315          */
 316
 317         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 318         {
 319                 /* check for abandon */
 320                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 321                         if ( rc > 0 ) {
 322                                 ldap_msgfree( res );
 323                         }
 324                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 325                         rc = SLAPD_ABANDON;
 326                         goto finish;
 327                 }
 328
 329                 if ( rc == 0 || rc == -2 ) {
 330                         ldap_pvt_thread_yield();
 331
 332                         /* check timeout */
 333                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 334                                 if ( rc == 0 ) {
 335                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 336                                         rs->sr_text = "Operation timed out";
 337                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 338                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 339                                         goto finish;
 340                                 }
 341
 342                         } else {
 343                                 LDAP_BACK_TV_SET( &tv );
 344                         }
 345
 346                         /* check time limit */
 347                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 348                                         && slap_get_time() > stoptime )
 349                         {
 350                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 351                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 352                                 goto finish;
 353                         }
 354                         continue;
 355
 356                 } else {
 357                         /* only touch when activity actually took place... */
 358                         if ( li->li_idle_timeout ) {
 359                                 lc->lc_time = op->o_time;
 360                         }
 361
 362                         /* don't retry any more */
 363                         dont_retry = 1;
 364                 }
 365
 366
 367                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 368                         Entry           ent = { 0 };
 369                         struct berval   bdn = BER_BVNULL;
 370
 371                         do_retry = 0;
 372
 373                         e = ldap_first_entry( lc->lc_ld, res );
 374                         rc = ldap_build_entry( op, e, &ent, &bdn,
 375                                                 remove_unknown_schema);
 376                         if ( rc == LDAP_SUCCESS ) {
 377                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 378                                 rs->sr_entry = &ent;
 379                                 rs->sr_attrs = op->ors_attrs;
 380                                 rs->sr_operational_attrs = NULL;
 381                                 rs->sr_flags = 0;
 382                                 rs->sr_err = LDAP_SUCCESS;
 383                                 rc = rs->sr_err = send_search_entry( op, rs );
 384                                 if ( rs->sr_ctrls ) {
 385                                         ldap_controls_free( rs->sr_ctrls );
 386                                         rs->sr_ctrls = NULL;
 387                                 }
 388                                 rs->sr_entry = NULL;
 389                                 rs->sr_flags = 0;
 390                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 391                                         assert( ent.e_name.bv_val != bdn.bv_val );
 392                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 393                                         BER_BVZERO( &ent.e_name );
 394                                 }
 395                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 396                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 397                                         BER_BVZERO( &ent.e_nname );
 398                                 }
 399                                 entry_clean( &ent );
 400                         }
 401                         ldap_msgfree( res );
 402                         switch ( rc ) {
 403                         case LDAP_SUCCESS:
 404                         case LDAP_INSUFFICIENT_ACCESS:
 405                                 break;
 406
 407                         default:
 408                                 if ( rc == LDAP_UNAVAILABLE ) {
 409                                         rc = rs->sr_err = LDAP_OTHER;
 410                                 } else {
 411                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 412                                 }
 413                                 goto finish;
 414                         }
 415
 416                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 417                         if ( LDAP_BACK_NOREFS( li ) ) {
 418                                 ldap_msgfree( res );
 419                                 continue;
 420                         }
 421
 422                         do_retry = 0;
 423                         rc = ldap_parse_reference( lc->lc_ld, res,
 424                                         &references, &rs->sr_ctrls, 1 );
 425
 426                         if ( rc != LDAP_SUCCESS ) {
 427                                 continue;
 428                         }
 429
 430                         /* FIXME: there MUST be at least one */
 431                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 432                                 int             cnt;
 433
 434                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 435                                         /* NO OP */ ;
 436
 437                                 /* FIXME: there MUST be at least one */
 438                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 439                                         op->o_tmpmemctx );
 440
 441                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 442                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 443                                 }
 444                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 445
 446                                 /* ignore return value by now */
 447                                 RS_ASSERT( !(rs->sr_flags & REP_ENTRY_MASK) );
 448                                 rs->sr_entry = NULL;
 449                                 ( void )send_search_reference( op, rs );
 450
 451                         } else {
 452                                 Debug( LDAP_DEBUG_ANY,
 453                                         "%s ldap_back_search: "
 454                                         "got SEARCH_REFERENCE "
 455                                         "with no referrals\n",
 456                                         op->o_log_prefix, 0, 0 );
 457                         }
 458
 459                         /* cleanup */
 460                         if ( references ) {
 461                                 ber_memvfree( (void **)references );
 462                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 463                                 rs->sr_ref = NULL;
 464                                 references = NULL;
 465                         }
 466
 467                         if ( rs->sr_ctrls ) {
 468                                 ldap_controls_free( rs->sr_ctrls );
 469                                 rs->sr_ctrls = NULL;
 470                         }
 471
 472                 } else if ( rc == LDAP_RES_INTERMEDIATE ) {
 473                         /* FIXME: response controls
 474                          * are passed without checks */
 475                         rc = ldap_parse_intermediate( lc->lc_ld,
 476                                 res,
 477                                 (char **)&rs->sr_rspoid,
 478                                 &rs->sr_rspdata,
 479                                 &rs->sr_ctrls,
 480                                 0 );
 481                         if ( rc != LDAP_SUCCESS ) {
 482                                 continue;
 483                         }
 484
 485                         slap_send_ldap_intermediate( op, rs );
 486
 487                         if ( rs->sr_rspoid != NULL ) {
 488                                 ber_memfree( (char *)rs->sr_rspoid );
 489                                 rs->sr_rspoid = NULL;
 490                         }
 491
 492                         if ( rs->sr_rspdata != NULL ) {
 493                                 ber_bvfree( rs->sr_rspdata );
 494                                 rs->sr_rspdata = NULL;
 495                         }
 496
 497                         if ( rs->sr_ctrls != NULL ) {
 498                                 ldap_controls_free( rs->sr_ctrls );
 499                                 rs->sr_ctrls = NULL;
 500                         }
 501
 502                 } else {
 503                         char            *err = NULL;
 504
 505                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 506                                         &match.bv_val, &err,
 507                                         &references, &rs->sr_ctrls, 1 );
 508                         if ( rc == LDAP_SUCCESS ) {
 509                                 if ( err ) {
 510                                         rs->sr_text = err;
 511                                         freetext = 1;
 512                                 }
 513                         } else {
 514                                 rs->sr_err = rc;
 515                         }
 516                         rs->sr_err = slap_map_api2result( rs );
 517
 518                         /* RFC 4511: referrals can only appear
 519                          * if result code is LDAP_REFERRAL */
 520                         if ( references
 521                                 && references[ 0 ]
 522                                 && references[ 0 ][ 0 ] )
 523                         {
 524                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 525                                         Debug( LDAP_DEBUG_ANY,
 526                                                 "%s ldap_back_search: "
 527                                                 "got referrals with err=%d\n",
 528                                                 op->o_log_prefix,
 529                                                 rs->sr_err, 0 );
 530
 531                                 } else {
 532                                         int     cnt;
 533
 534                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 535                                                 /* NO OP */ ;
 536
 537                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 538                                                 op->o_tmpmemctx );
 539
 540                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 541                                                 /* duplicating ...*/
 542                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 543                                         }
 544                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 545                                 }
 546
 547                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 548                                 Debug( LDAP_DEBUG_ANY,
 549                                         "%s ldap_back_search: "
 550                                         "got err=%d with null "
 551                                         "or empty referrals\n",
 552                                         op->o_log_prefix,
 553                                         rs->sr_err, 0 );
 554
 555                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 556                         }
 557
 558                         if ( match.bv_val != NULL ) {
 559                                 match.bv_len = strlen( match.bv_val );
 560                         }
 561
 562                         rc = 0;
 563                         break;
 564                 }
 565
 566                 /* if needed, restore timeout */
 567                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 568                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 569                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 570                                 tv.tv_usec = 0;
 571                         }
 572                 }
 573         }
 574
 575         if ( rc == -1 ) {
 576                 if ( dont_retry == 0 ) {
 577                         if ( do_retry ) {
 578                                 do_retry = 0;
 579                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 580                                         goto retry;
 581                                 }
 582                         }
 583
 584                         rs->sr_err = LDAP_SERVER_DOWN;
 585                         rs->sr_err = slap_map_api2result( rs );
 586                         goto finish;
 587
 588                 } else if ( LDAP_BACK_ONERR_STOP( li ) ) {
 589                         /* if onerr == STOP */
 590                         rs->sr_err = LDAP_SERVER_DOWN;
 591                         rs->sr_err = slap_map_api2result( rs );
 592                         goto finish;
 593                 }
 594         }
 595
 596         /*
 597          * Rewrite the matched portion of the search base, if required
 598          */
 599         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 600                 struct berval   pmatch;
 601
 602                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
 603                         pmatch.bv_val = match.bv_val;
 604                         match.bv_val = NULL;
 605                 }
 606                 rs->sr_matched = pmatch.bv_val;
 607                 rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 608         }
 609
 610 finish:;
 611         if ( !BER_BVISNULL( &match ) ) {
 612                 ber_memfree( match.bv_val );
 613         }
 614
 615         if ( rs->sr_v2ref ) {
 616                 rs->sr_err = LDAP_REFERRAL;
 617         }
 618
 619         if ( LDAP_BACK_QUARANTINE( li ) ) {
 620                 ldap_back_quarantine( op, rs );
 621         }
 622
 623         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 624                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 625         }
 626
 627 #if 0
 628         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 629         if ( rc != SLAPD_ABANDON )
 630 #endif
 631         {
 632                 send_ldap_result( op, rs );
 633         }
 634
 635         (void)ldap_back_controls_free( op, rs, &ctrls );
 636
 637         if ( rs->sr_ctrls ) {
 638                 ldap_controls_free( rs->sr_ctrls );
 639                 rs->sr_ctrls = NULL;
 640         }
 641
 642         if ( rs->sr_text ) {
 643                 if ( freetext ) {
 644                         ber_memfree( (char *)rs->sr_text );
 645                 }
 646                 rs->sr_text = NULL;
 647         }
 648
 649         if ( rs->sr_ref ) {
 650                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 651                 rs->sr_ref = NULL;
 652         }
 653
 654         if ( references ) {
 655                 ber_memvfree( (void **)references );
 656         }
 657
 658         if ( attrs ) {
 659                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 660         }
 661
 662         if ( lc != NULL ) {
 663                 ldap_back_release_conn( li, lc );
 664         }
 665
 666         if ( rs->sr_err == LDAP_UNAVAILABLE &&
 667                 /* if we originally bound and wanted rebind-as-user, must drop
 668                  * the connection now because we just discarded the credentials.
 669                  * ITS#7464, #8142
 670                  */
 671                 LDAP_BACK_SAVECRED( li ) && SLAP_IS_AUTHZ_BACKEND( op ) )
 672                 rs->sr_err = SLAPD_DISCONNECT;
 673         return rs->sr_err;
 674 }
 675
 676 static int
 677 ldap_build_entry(
 678                 Operation       *op,
 679                 LDAPMessage     *e,
 680                 Entry           *ent,
 681                 struct berval   *bdn,
 682                 int remove_unknown_schema)
 683 {
 684         struct berval   a;
 685         BerElement      ber = *ldap_get_message_ber( e );
 686         Attribute       *attr, **attrp;
 687         const char      *text;
 688         int             last;
 689         char *lastb;
 690         ber_len_t len;
 691
 692         /* safe assumptions ... */
 693         assert( ent != NULL );
 694         BER_BVZERO( &ent->e_bv );
 695
 696         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 697                 return LDAP_DECODING_ERROR;
 698         }
 699
 700         /*
 701          * Note: this may fail if the target host(s) schema differs
 702          * from the one known to the meta, and a DN with unknown
 703          * attributes is returned.
 704          *
 705          * FIXME: should we log anything, or delegate to dnNormalize?
 706          */
 707         /* Note: if the distinguished values or the naming attributes
 708          * change, should we massage them as well?
 709          */
 710         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 711                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 712         {
 713                 return LDAP_INVALID_DN_SYNTAX;
 714         }
 715
 716         ent->e_attrs = NULL;
 717         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 718                 return LDAP_SUCCESS;
 719         }
 720
 721         attrp = &ent->e_attrs;
 722         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 723                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 724                 int                             i;
 725                 slap_syntax_validate_func       *validate;
 726                 slap_syntax_transform_func      *pretty;
 727
 728                 attr = attr_alloc( NULL );
 729                 if ( attr == NULL ) {
 730                         return LDAP_OTHER;
 731                 }
 732                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 733                                 != LDAP_SUCCESS )
 734                 {
 735                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 736                                  (remove_unknown_schema ? SLAP_AD_NOINSERT : SLAP_AD_PROXIED )) != LDAP_SUCCESS )
 737                         {
 738                                 Debug( LDAP_DEBUG_ANY,
 739                                         "%s ldap_build_entry: "
 740                                         "slap_bv2undef_ad(%s): %s\n",
 741                                         op->o_log_prefix, a.bv_val, text );
 742
 743                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 744                                 attr_free( attr );
 745                                 continue;
 746                         }
 747                 }
 748
 749                 /* no subschemaSubentry */
 750                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 751                         || attr->a_desc == slap_schema.si_ad_entryDN )
 752                 {
 753
 754                         /*
 755                          * We eat target's subschemaSubentry because
 756                          * a search for this value is likely not
 757                          * to resolve to the appropriate backend;
 758                          * later, the local subschemaSubentry is
 759                          * added.
 760                          *
 761                          * We also eat entryDN because the frontend
 762                          * will reattach it without checking if already
 763                          * present...
 764                          */
 765                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 766                         attr_free( attr );
 767                         continue;
 768                 }
 769
 770                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 771                                 || attr->a_vals == NULL )
 772                 {
 773                         /*
 774                          * Note: attr->a_vals can be null when using
 775                          * values result filter
 776                          */
 777                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 778                 }
 779
 780                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 781                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 782
 783                 if ( !validate && !pretty ) {
 784                         attr->a_nvals = NULL;
 785                         attr_free( attr );
 786                         goto next_attr;
 787                 }
 788
 789                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 790                 last = i;
 791
 792                 /*
 793                  * check that each value is valid per syntax
 794                  * and pretty if appropriate
 795                  */
 796                 for ( i = 0; i<last; i++ ) {
 797                         struct berval   pval;
 798                         int             rc;
 799
 800                         if ( pretty ) {
 801                                 rc = ordered_value_pretty( attr->a_desc,
 802                                         &attr->a_vals[i], &pval, NULL );
 803
 804                         } else {
 805                                 rc = ordered_value_validate( attr->a_desc,
 806                                         &attr->a_vals[i], 0 );
 807                         }
 808
 809                         if ( rc != LDAP_SUCCESS ) {
 810                                 ObjectClass *oc;
 811
 812                                 /* check if, by chance, it's an undefined objectClass */
 813                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 814                                                 ( oc = oc_bvfind_undef_ex( &attr->a_vals[i],
 815                                                                 remove_unknown_schema ) ) != NULL )
 816                                 {
 817                                         ber_dupbv( &pval, &oc->soc_cname );
 818                                         rc = LDAP_SUCCESS;
 819
 820                                 } else {
 821                                         ber_memfree( attr->a_vals[i].bv_val );
 822                                         if ( --last == i ) {
 823                                                 BER_BVZERO( &attr->a_vals[i] );
 824                                                 break;
 825                                         }
 826                                         attr->a_vals[i] = attr->a_vals[last];
 827                                         BER_BVZERO( &attr->a_vals[last] );
 828                                         i--;
 829                                 }
 830                         }
 831
 832                         if ( rc == LDAP_SUCCESS && pretty ) {
 833                                 ber_memfree( attr->a_vals[i].bv_val );
 834                                 attr->a_vals[i] = pval;
 835                         }
 836                 }
 837                 attr->a_numvals = last = i;
 838                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 839                         attr->a_nvals = NULL;
 840                         attr_free( attr );
 841                         goto next_attr;
 842                 }
 843
 844                 if ( last && attr->a_desc->ad_type->sat_equality &&
 845                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 846                 {
 847                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 848                         for ( i = 0; i < last; i++ ) {
 849                                 int             rc;
 850
 851                                 rc = ordered_value_normalize(
 852                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 853                                         attr->a_desc,
 854                                         attr->a_desc->ad_type->sat_equality,
 855                                         &attr->a_vals[i], &attr->a_nvals[i],
 856                                         NULL );
 857
 858                                 if ( rc != LDAP_SUCCESS ) {
 859                                         ber_memfree( attr->a_vals[i].bv_val );
 860                                         if ( --last == i ) {
 861                                                 BER_BVZERO( &attr->a_vals[i] );
 862                                                 break;
 863                                         }
 864                                         attr->a_vals[i] = attr->a_vals[last];
 865                                         BER_BVZERO( &attr->a_vals[last] );
 866                                         i--;
 867                                 }
 868                         }
 869                         BER_BVZERO( &attr->a_nvals[i] );
 870                         if ( last == 0 ) {
 871                                 attr_free( attr );
 872                                 goto next_attr;
 873                         }
 874
 875                 } else {
 876                         attr->a_nvals = attr->a_vals;
 877                 }
 878
 879                 attr->a_numvals = last;
 880
 881                 /* Handle sorted vals, strip dups but keep the attr */
 882                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 883                         while ( attr->a_numvals > 1 ) {
 884                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 885                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 886                                         break;
 887
 888                                 /* Strip duplicate values */
 889                                 if ( attr->a_nvals != attr->a_vals )
 890                                         ber_memfree( attr->a_nvals[i].bv_val );
 891                                 ber_memfree( attr->a_vals[i].bv_val );
 892                                 attr->a_numvals--;
 893
 894                                 assert( i >= 0 );
 895                                 if ( (unsigned)i < attr->a_numvals ) {
 896                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 897                                         if ( attr->a_nvals != attr->a_vals )
 898                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 899                                 }
 900                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 901                                 if ( attr->a_nvals != attr->a_vals )
 902                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 903                         }
 904                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 905                 }
 906
 907                 *attrp = attr;
 908                 attrp = &attr->a_next;
 909
 910 next_attr:;
 911         }
 912
 913         return LDAP_SUCCESS;
 914 }
 915
 916 /* return 0 IFF we can retrieve the entry with ndn
 917  */
 918 int
 919 ldap_back_entry_get(
 920                 Operation               *op,
 921                 struct berval           *ndn,
 922                 ObjectClass             *oc,
 923                 AttributeDescription    *at,
 924                 int                     rw,
 925                 Entry                   **ent )
 926 {
 927         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 928
 929         ldapconn_t      *lc = NULL;
 930         int             rc;
 931         struct berval   bdn;
 932         LDAPMessage     *result = NULL,
 933                         *e = NULL;
 934         char            *attr[3], **attrp = NULL;
 935         char            *filter = NULL;
 936         SlapReply       rs;
 937         int             do_retry = 1;
 938         LDAPControl     **ctrls = NULL;
 939         Operation op2 = *op;
 940
 941         int             remove_unknown_schema =
 942                                 LDAP_BACK_OMIT_UNKNOWN_SCHEMA (li);
 943         *ent = NULL;
 944
 945         /* Tell getconn this is a privileged op */
 946         op2.o_do_not_cache = 1;
 947         /* use rootdn to be doubly explicit this is privileged */
 948         op2.o_dn = op->o_bd->be_rootdn;
 949         op2.o_ndn = op->o_bd->be_rootndn;
 950         /* ldap_back_entry_get() is an entry lookup, so it does not need
 951          * to know what the entry is being looked up for */
 952         op2.o_tag = LDAP_REQ_SEARCH;
 953         op2.o_ctrls = NULL;
 954         rc = ldap_back_dobind( &lc, &op2, &rs, LDAP_BACK_DONTSEND );
 955         if ( !rc ) {
 956                 return rs.sr_err;
 957         }
 958
 959         if ( at ) {
 960                 attrp = attr;
 961                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 962                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 963                         attr[1] = at->ad_cname.bv_val;
 964                         attr[2] = NULL;
 965
 966                 } else {
 967                         attr[0] = at->ad_cname.bv_val;
 968                         attr[1] = NULL;
 969                 }
 970         }
 971
 972         if ( oc ) {
 973                 char    *ptr;
 974
 975                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 976                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 977                 ptr = lutil_strcopy( filter, "(objectClass=" );
 978                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 979                 *ptr++ = ')';
 980                 *ptr++ = '\0';
 981         }
 982
 983 retry:
 984         ctrls = NULL;
 985         rc = ldap_back_controls_add( &op2, &rs, lc, &ctrls );
 986         if ( rc != LDAP_SUCCESS ) {
 987                 goto cleanup;
 988         }
 989
 990         /* TODO: timeout? */
 991         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 992                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 993                                 NULL, LDAP_NO_LIMIT, 0, &result );
 994         if ( rc != LDAP_SUCCESS ) {
 995                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 996                         do_retry = 0;
 997                         if ( ldap_back_retry( &lc, &op2, &rs, LDAP_BACK_DONTSEND ) ) {
 998                                 /* if the identity changed, there might be need to re-authz */
 999                                 (void)ldap_back_controls_free( &op2, &rs, &ctrls );
1000                                 goto retry;
1001                         }
1002                 }
1003                 goto cleanup;
1004         }
1005
1006         e = ldap_first_entry( lc->lc_ld, result );
1007         if ( e == NULL ) {
1008                 /* the entry exists, but it doesn't match the filter? */
1009                 goto cleanup;
1010         }
1011
1012         *ent = entry_alloc();
1013         if ( *ent == NULL ) {
1014                 rc = LDAP_NO_MEMORY;
1015                 goto cleanup;
1016         }
1017
1018         rc = ldap_build_entry( op, e, *ent, &bdn, remove_unknown_schema );
1019
1020         if ( rc != LDAP_SUCCESS ) {
1021                 entry_free( *ent );
1022                 *ent = NULL;
1023         }
1024
1025 cleanup:
1026         (void)ldap_back_controls_free( &op2, &rs, &ctrls );
1027
1028         if ( result ) {
1029                 ldap_msgfree( result );
1030         }
1031
1032         if ( filter ) {
1033                 op->o_tmpfree( filter, op->o_tmpmemctx );
1034         }
1035
1036         if ( lc != NULL ) {
1037                 ldap_back_release_conn( li, lc );
1038         }
1039
1040         return rc;
1041 }