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 1999-2015 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 );
  41
  42 /*
  43  * replaces (&) with (objectClass=*) and (|) with (!(objectClass=*))
  44  * as the best replacement for RFC 4526 absolute true/absolute false
  45  * filters; the only difference (AFAIK) is that they require search
  46  * access to objectClass.
  47  *
  48  * filter->bv_val may be alloc'd on the thread's slab, if equal to
  49  * op->ors_filterstr.bv_val, or realloc'd on the thread's slab otherwise.
  50  */
  51 static int
  52 ldap_back_munge_filter(
  53         Operation       *op,
  54         struct berval   *filter )
  55 {
  56         char *ptr;
  57         int gotit = 0;
  58
  59         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  60                         filter->bv_val, 0, 0 );
  61
  62         for ( ptr = strchr( filter->bv_val, '(' );
  63                         ptr;
  64                         ptr = strchr( ptr, '(' ) )
  65         {
  66                 static struct berval
  67                         bv_t = BER_BVC( "(&)" ),
  68                         bv_f = BER_BVC( "(|)" ),
  69                         bv_T = BER_BVC( "(objectClass=*)" ),
  70                         bv_F = BER_BVC( "(!(objectClass=*))" );
  71                 struct berval *oldbv = NULL,
  72                         *newbv = NULL,
  73                         oldfilter = BER_BVNULL;
  74
  75                 if ( ptr[2] != ')' ) {
  76                         ptr++;
  77                         continue;
  78                 }
  79
  80                 switch ( ptr[1] ) {
  81                 case '&':
  82                         oldbv = &bv_t;
  83                         newbv = &bv_T;
  84                         break;
  85
  86                 case '|':
  87                         oldbv = &bv_f;
  88                         newbv = &bv_F;
  89                         break;
  90
  91                 default:
  92                         /* should be an error */
  93                         continue;
  94                 }
  95
  96                 oldfilter = *filter;
  97                 filter->bv_len += newbv->bv_len - oldbv->bv_len;
  98                 if ( filter->bv_val == op->ors_filterstr.bv_val ) {
  99                         filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 100                                         op->o_tmpmemctx );
 101
 102                         AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 103                                         ptr - oldfilter.bv_val );
 104
 105                 } else {
 106                         filter->bv_val = op->o_tmprealloc( filter->bv_val,
 107                                         filter->bv_len + 1, op->o_tmpmemctx );
 108                 }
 109
 110                 ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 111
 112                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 113                                 &ptr[ oldbv->bv_len ],
 114                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 115                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 116
 117                 ptr += newbv->bv_len;
 118
 119                 gotit++;
 120         }
 121
 122         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 123                         filter->bv_val, gotit, 0 );
 124
 125         return gotit;
 126 }
 127
 128 int
 129 ldap_back_search(
 130                 Operation       *op,
 131                 SlapReply       *rs )
 132 {
 133         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 134
 135         ldapconn_t      *lc = NULL;
 136         struct timeval  tv;
 137         time_t          stoptime = (time_t)(-1);
 138         LDAPMessage     *res,
 139                         *e;
 140         int             rc = 0,
 141                         msgid;
 142         struct berval   match = BER_BVNULL,
 143                         filter = BER_BVNULL;
 144         int             i, x;
 145         char            **attrs = NULL;
 146         int             freetext = 0, filter_undef = 0;
 147         int             do_retry = 1, dont_retry = 0;
 148         LDAPControl     **ctrls = NULL;
 149         char            **references = NULL;
 150
 151         rs_assert_ready( rs );
 152         rs->sr_flags &= ~REP_ENTRY_MASK; /* paranoia, we can set rs = non-entry */
 153
 154         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 155                 return rs->sr_err;
 156         }
 157
 158         /*
 159          * FIXME: in case of values return filter, we might want
 160          * to map attrs and maybe rewrite value
 161          */
 162
 163         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 164                 tv.tv_sec = op->ors_tlimit;
 165                 tv.tv_usec = 0;
 166                 stoptime = op->o_time + op->ors_tlimit;
 167
 168         } else {
 169                 LDAP_BACK_TV_SET( &tv );
 170         }
 171
 172         i = 0;
 173         if ( op->ors_attrs ) {
 174                 for ( ; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 175                         /* just count attrs */ ;
 176         }
 177
 178         x = 0;
 179         if ( op->o_bd->be_extra_anlist ) {
 180                 for ( ; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++ )
 181                         /* just count attrs */ ;
 182         }
 183
 184         if ( i > 0 || x > 0 ) {
 185                 int j = 0;
 186
 187                 attrs = op->o_tmpalloc( ( i + x + 1 )*sizeof( char * ),
 188                         op->o_tmpmemctx );
 189                 if ( attrs == NULL ) {
 190                         rs->sr_err = LDAP_NO_MEMORY;
 191                         rc = -1;
 192                         goto finish;
 193                 }
 194
 195                 if ( i > 0 ) {
 196                         for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++, j++ ) {
 197                                 attrs[ j ] = op->ors_attrs[i].an_name.bv_val;
 198                         }
 199                 }
 200
 201                 if ( x > 0 ) {
 202                         for ( x = 0; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++, j++ ) {
 203                                 if ( op->o_bd->be_extra_anlist[x].an_desc &&
 204                                         ad_inlist( op->o_bd->be_extra_anlist[x].an_desc, op->ors_attrs ) )
 205                                 {
 206                                         continue;
 207                                 }
 208
 209                                 attrs[ j ] = op->o_bd->be_extra_anlist[x].an_name.bv_val;
 210                         }
 211                 }
 212
 213                 attrs[ j ] = NULL;
 214         }
 215
 216         ctrls = op->o_ctrls;
 217         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 218         if ( rc != LDAP_SUCCESS ) {
 219                 goto finish;
 220         }
 221
 222         /* deal with <draft-zeilenga-ldap-t-f> filters */
 223         filter = op->ors_filterstr;
 224 retry:
 225         /* this goes after retry because ldap_back_munge_filter()
 226          * optionally replaces RFC 4526 T-F filters (&) (|)
 227          * if already computed, they will be re-installed
 228          * by filter2bv_undef_x() later */
 229         if ( !LDAP_BACK_T_F( li ) ) {
 230                 ldap_back_munge_filter( op, &filter );
 231         }
 232
 233         rs->sr_err = ldap_pvt_search( lc->lc_ld, op->o_req_dn.bv_val,
 234                         op->ors_scope, filter.bv_val,
 235                         attrs, op->ors_attrsonly, ctrls, NULL,
 236                         tv.tv_sec ? &tv : NULL,
 237                         op->ors_slimit, op->ors_deref, &msgid );
 238
 239         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
 240         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_SEARCH ], 1 );
 241         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
 242
 243         if ( rs->sr_err != LDAP_SUCCESS ) {
 244                 switch ( rs->sr_err ) {
 245                 case LDAP_SERVER_DOWN:
 246                         if ( do_retry ) {
 247                                 do_retry = 0;
 248                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 249                                         goto retry;
 250                                 }
 251                         }
 252
 253                         if ( lc == NULL ) {
 254                                 /* reset by ldap_back_retry ... */
 255                                 rs->sr_err = slap_map_api2result( rs );
 256
 257                         } else {
 258                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 259                         }
 260
 261                         goto finish;
 262
 263                 case LDAP_FILTER_ERROR:
 264                         /* first try? */
 265                         if ( !filter_undef &&
 266                                 strstr( filter.bv_val, "(?" ) &&
 267                                 !LDAP_BACK_NOUNDEFFILTER( li ) )
 268                         {
 269                                 BER_BVZERO( &filter );
 270                                 filter2bv_undef_x( op, op->ors_filter, 1, &filter );
 271                                 filter_undef = 1;
 272                                 goto retry;
 273                         }
 274
 275                         /* invalid filters return success with no data */
 276                         rs->sr_err = LDAP_SUCCESS;
 277                         rs->sr_text = NULL;
 278                         goto finish;
 279
 280                 default:
 281                         rs->sr_err = slap_map_api2result( rs );
 282                         rs->sr_text = NULL;
 283                         goto finish;
 284                 }
 285         }
 286
 287         /* if needed, initialize timeout */
 288         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 289                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 290                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 291                         tv.tv_usec = 0;
 292                 }
 293         }
 294
 295         /* We pull apart the ber result, stuff it into a slapd entry, and
 296          * let send_search_entry stuff it back into ber format. Slow & ugly,
 297          * but this is necessary for version matching, and for ACL processing.
 298          */
 299
 300         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 301         {
 302                 /* check for abandon */
 303                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 304                         if ( rc > 0 ) {
 305                                 ldap_msgfree( res );
 306                         }
 307                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 308                         rc = SLAPD_ABANDON;
 309                         goto finish;
 310                 }
 311
 312                 if ( rc == 0 || rc == -2 ) {
 313                         ldap_pvt_thread_yield();
 314
 315                         /* check timeout */
 316                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 317                                 if ( rc == 0 ) {
 318                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 319                                         rs->sr_text = "Operation timed out";
 320                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 321                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 322                                         goto finish;
 323                                 }
 324
 325                         } else {
 326                                 LDAP_BACK_TV_SET( &tv );
 327                         }
 328
 329                         /* check time limit */
 330                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 331                                         && slap_get_time() > stoptime )
 332                         {
 333                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 334                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 335                                 goto finish;
 336                         }
 337                         continue;
 338
 339                 } else {
 340                         /* only touch when activity actually took place... */
 341                         if ( li->li_idle_timeout ) {
 342                                 lc->lc_time = op->o_time;
 343                         }
 344
 345                         /* don't retry any more */
 346                         dont_retry = 1;
 347                 }
 348
 349
 350                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 351                         Entry           ent = { 0 };
 352                         struct berval   bdn = BER_BVNULL;
 353
 354                         do_retry = 0;
 355
 356                         e = ldap_first_entry( lc->lc_ld, res );
 357                         rc = ldap_build_entry( op, e, &ent, &bdn );
 358                         if ( rc == LDAP_SUCCESS ) {
 359                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 360                                 rs->sr_entry = &ent;
 361                                 rs->sr_attrs = op->ors_attrs;
 362                                 rs->sr_operational_attrs = NULL;
 363                                 rs->sr_flags = 0;
 364                                 rs->sr_err = LDAP_SUCCESS;
 365                                 rc = rs->sr_err = send_search_entry( op, rs );
 366                                 if ( rs->sr_ctrls ) {
 367                                         ldap_controls_free( rs->sr_ctrls );
 368                                         rs->sr_ctrls = NULL;
 369                                 }
 370                                 rs->sr_entry = NULL;
 371                                 rs->sr_flags = 0;
 372                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 373                                         assert( ent.e_name.bv_val != bdn.bv_val );
 374                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 375                                         BER_BVZERO( &ent.e_name );
 376                                 }
 377                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 378                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 379                                         BER_BVZERO( &ent.e_nname );
 380                                 }
 381                                 entry_clean( &ent );
 382                         }
 383                         ldap_msgfree( res );
 384                         switch ( rc ) {
 385                         case LDAP_SUCCESS:
 386                         case LDAP_INSUFFICIENT_ACCESS:
 387                                 break;
 388
 389                         default:
 390                                 if ( rc == LDAP_UNAVAILABLE ) {
 391                                         rc = rs->sr_err = LDAP_OTHER;
 392                                 } else {
 393                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 394                                 }
 395                                 goto finish;
 396                         }
 397
 398                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 399                         if ( LDAP_BACK_NOREFS( li ) ) {
 400                                 ldap_msgfree( res );
 401                                 continue;
 402                         }
 403
 404                         do_retry = 0;
 405                         rc = ldap_parse_reference( lc->lc_ld, res,
 406                                         &references, &rs->sr_ctrls, 1 );
 407
 408                         if ( rc != LDAP_SUCCESS ) {
 409                                 continue;
 410                         }
 411
 412                         /* FIXME: there MUST be at least one */
 413                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 414                                 int             cnt;
 415
 416                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 417                                         /* NO OP */ ;
 418
 419                                 /* FIXME: there MUST be at least one */
 420                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 421                                         op->o_tmpmemctx );
 422
 423                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 424                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 425                                 }
 426                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 427
 428                                 /* ignore return value by now */
 429                                 RS_ASSERT( !(rs->sr_flags & REP_ENTRY_MASK) );
 430                                 rs->sr_entry = NULL;
 431                                 ( void )send_search_reference( op, rs );
 432
 433                         } else {
 434                                 Debug( LDAP_DEBUG_ANY,
 435                                         "%s ldap_back_search: "
 436                                         "got SEARCH_REFERENCE "
 437                                         "with no referrals\n",
 438                                         op->o_log_prefix, 0, 0 );
 439                         }
 440
 441                         /* cleanup */
 442                         if ( references ) {
 443                                 ber_memvfree( (void **)references );
 444                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 445                                 rs->sr_ref = NULL;
 446                                 references = NULL;
 447                         }
 448
 449                         if ( rs->sr_ctrls ) {
 450                                 ldap_controls_free( rs->sr_ctrls );
 451                                 rs->sr_ctrls = NULL;
 452                         }
 453
 454                 } else if ( rc == LDAP_RES_INTERMEDIATE ) {
 455                         /* FIXME: response controls
 456                          * are passed without checks */
 457                         rc = ldap_parse_intermediate( lc->lc_ld,
 458                                 res,
 459                                 (char **)&rs->sr_rspoid,
 460                                 &rs->sr_rspdata,
 461                                 &rs->sr_ctrls,
 462                                 0 );
 463                         if ( rc != LDAP_SUCCESS ) {
 464                                 continue;
 465                         }
 466
 467                         slap_send_ldap_intermediate( op, rs );
 468
 469                         if ( rs->sr_rspoid != NULL ) {
 470                                 ber_memfree( (char *)rs->sr_rspoid );
 471                                 rs->sr_rspoid = NULL;
 472                         }
 473
 474                         if ( rs->sr_rspdata != NULL ) {
 475                                 ber_bvfree( rs->sr_rspdata );
 476                                 rs->sr_rspdata = NULL;
 477                         }
 478
 479                         if ( rs->sr_ctrls != NULL ) {
 480                                 ldap_controls_free( rs->sr_ctrls );
 481                                 rs->sr_ctrls = NULL;
 482                         }
 483
 484                 } else {
 485                         char            *err = NULL;
 486
 487                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 488                                         &match.bv_val, &err,
 489                                         &references, &rs->sr_ctrls, 1 );
 490                         if ( rc == LDAP_SUCCESS ) {
 491                                 if ( err ) {
 492                                         rs->sr_text = err;
 493                                         freetext = 1;
 494                                 }
 495                         } else {
 496                                 rs->sr_err = rc;
 497                         }
 498                         rs->sr_err = slap_map_api2result( rs );
 499
 500                         /* RFC 4511: referrals can only appear
 501                          * if result code is LDAP_REFERRAL */
 502                         if ( references
 503                                 && references[ 0 ]
 504                                 && references[ 0 ][ 0 ] )
 505                         {
 506                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 507                                         Debug( LDAP_DEBUG_ANY,
 508                                                 "%s ldap_back_search: "
 509                                                 "got referrals with err=%d\n",
 510                                                 op->o_log_prefix,
 511                                                 rs->sr_err, 0 );
 512
 513                                 } else {
 514                                         int     cnt;
 515
 516                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 517                                                 /* NO OP */ ;
 518
 519                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 520                                                 op->o_tmpmemctx );
 521
 522                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 523                                                 /* duplicating ...*/
 524                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 525                                         }
 526                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 527                                 }
 528
 529                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 530                                 Debug( LDAP_DEBUG_ANY,
 531                                         "%s ldap_back_search: "
 532                                         "got err=%d with null "
 533                                         "or empty referrals\n",
 534                                         op->o_log_prefix,
 535                                         rs->sr_err, 0 );
 536
 537                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 538                         }
 539
 540                         if ( match.bv_val != NULL ) {
 541                                 match.bv_len = strlen( match.bv_val );
 542                         }
 543
 544                         rc = 0;
 545                         break;
 546                 }
 547
 548                 /* if needed, restore timeout */
 549                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 550                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 551                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 552                                 tv.tv_usec = 0;
 553                         }
 554                 }
 555         }
 556
 557         if ( rc == -1 ) {
 558                 if ( dont_retry == 0 ) {
 559                         if ( do_retry ) {
 560                                 do_retry = 0;
 561                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 562                                         goto retry;
 563                                 }
 564                         }
 565
 566                         rs->sr_err = LDAP_SERVER_DOWN;
 567                         rs->sr_err = slap_map_api2result( rs );
 568                         goto finish;
 569
 570                 } else if ( LDAP_BACK_ONERR_STOP( li ) ) {
 571                         /* if onerr == STOP */
 572                         rs->sr_err = LDAP_SERVER_DOWN;
 573                         rs->sr_err = slap_map_api2result( rs );
 574                         goto finish;
 575                 }
 576         }
 577
 578         /*
 579          * Rewrite the matched portion of the search base, if required
 580          */
 581         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 582                 struct berval   pmatch;
 583
 584                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
 585                         pmatch.bv_val = match.bv_val;
 586                         match.bv_val = NULL;
 587                 }
 588                 rs->sr_matched = pmatch.bv_val;
 589                 rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 590         }
 591
 592 finish:;
 593         if ( !BER_BVISNULL( &match ) ) {
 594                 ber_memfree( match.bv_val );
 595         }
 596
 597         if ( rs->sr_v2ref ) {
 598                 rs->sr_err = LDAP_REFERRAL;
 599         }
 600
 601         if ( LDAP_BACK_QUARANTINE( li ) ) {
 602                 ldap_back_quarantine( op, rs );
 603         }
 604
 605         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 606                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 607         }
 608
 609 #if 0
 610         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 611         if ( rc != SLAPD_ABANDON )
 612 #endif
 613         {
 614                 send_ldap_result( op, rs );
 615         }
 616
 617         (void)ldap_back_controls_free( op, rs, &ctrls );
 618
 619         if ( rs->sr_ctrls ) {
 620                 ldap_controls_free( rs->sr_ctrls );
 621                 rs->sr_ctrls = NULL;
 622         }
 623
 624         if ( rs->sr_text ) {
 625                 if ( freetext ) {
 626                         ber_memfree( (char *)rs->sr_text );
 627                 }
 628                 rs->sr_text = NULL;
 629         }
 630
 631         if ( rs->sr_ref ) {
 632                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 633                 rs->sr_ref = NULL;
 634         }
 635
 636         if ( references ) {
 637                 ber_memvfree( (void **)references );
 638         }
 639
 640         if ( attrs ) {
 641                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 642         }
 643
 644         if ( lc != NULL ) {
 645                 ldap_back_release_conn( li, lc );
 646         }
 647
 648         if ( rs->sr_err == LDAP_UNAVAILABLE &&
 649                 /* if we originally bound and wanted rebind-as-user, must drop
 650                  * the connection now because we just discarded the credentials.
 651                  * ITS#7464, #8142
 652                  */
 653                 LDAP_BACK_SAVECRED( li ) && SLAP_IS_AUTHZ_BACKEND( op ) )
 654                 rs->sr_err = SLAPD_DISCONNECT;
 655         return rs->sr_err;
 656 }
 657
 658 static int
 659 ldap_build_entry(
 660                 Operation       *op,
 661                 LDAPMessage     *e,
 662                 Entry           *ent,
 663                 struct berval   *bdn )
 664 {
 665         struct berval   a;
 666         BerElement      ber = *ldap_get_message_ber( e );
 667         Attribute       *attr, **attrp;
 668         const char      *text;
 669         int             last;
 670         char *lastb;
 671         ber_len_t len;
 672
 673         /* safe assumptions ... */
 674         assert( ent != NULL );
 675         BER_BVZERO( &ent->e_bv );
 676
 677         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 678                 return LDAP_DECODING_ERROR;
 679         }
 680
 681         /*
 682          * Note: this may fail if the target host(s) schema differs
 683          * from the one known to the meta, and a DN with unknown
 684          * attributes is returned.
 685          *
 686          * FIXME: should we log anything, or delegate to dnNormalize?
 687          */
 688         /* Note: if the distinguished values or the naming attributes
 689          * change, should we massage them as well?
 690          */
 691         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 692                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 693         {
 694                 return LDAP_INVALID_DN_SYNTAX;
 695         }
 696
 697         ent->e_attrs = NULL;
 698         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 699                 return LDAP_SUCCESS;
 700         }
 701
 702         attrp = &ent->e_attrs;
 703         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 704                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 705                 int                             i;
 706                 slap_syntax_validate_func       *validate;
 707                 slap_syntax_transform_func      *pretty;
 708
 709                 attr = attr_alloc( NULL );
 710                 if ( attr == NULL ) {
 711                         return LDAP_OTHER;
 712                 }
 713                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 714                                 != LDAP_SUCCESS )
 715                 {
 716                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 717                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 718                         {
 719                                 Debug( LDAP_DEBUG_ANY,
 720                                         "%s ldap_build_entry: "
 721                                         "slap_bv2undef_ad(%s): %s\n",
 722                                         op->o_log_prefix, a.bv_val, text );
 723
 724                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 725                                 attr_free( attr );
 726                                 continue;
 727                         }
 728                 }
 729
 730                 /* no subschemaSubentry */
 731                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 732                         || attr->a_desc == slap_schema.si_ad_entryDN )
 733                 {
 734
 735                         /*
 736                          * We eat target's subschemaSubentry because
 737                          * a search for this value is likely not
 738                          * to resolve to the appropriate backend;
 739                          * later, the local subschemaSubentry is
 740                          * added.
 741                          *
 742                          * We also eat entryDN because the frontend
 743                          * will reattach it without checking if already
 744                          * present...
 745                          */
 746                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 747                         attr_free( attr );
 748                         continue;
 749                 }
 750
 751                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 752                                 || attr->a_vals == NULL )
 753                 {
 754                         /*
 755                          * Note: attr->a_vals can be null when using
 756                          * values result filter
 757                          */
 758                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 759                 }
 760
 761                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 762                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 763
 764                 if ( !validate && !pretty ) {
 765                         attr->a_nvals = NULL;
 766                         attr_free( attr );
 767                         goto next_attr;
 768                 }
 769
 770                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 771                 last = i;
 772
 773                 /*
 774                  * check that each value is valid per syntax
 775                  * and pretty if appropriate
 776                  */
 777                 for ( i = 0; i<last; i++ ) {
 778                         struct berval   pval;
 779                         int             rc;
 780
 781                         if ( pretty ) {
 782                                 rc = ordered_value_pretty( attr->a_desc,
 783                                         &attr->a_vals[i], &pval, NULL );
 784
 785                         } else {
 786                                 rc = ordered_value_validate( attr->a_desc,
 787                                         &attr->a_vals[i], 0 );
 788                         }
 789
 790                         if ( rc != LDAP_SUCCESS ) {
 791                                 ObjectClass *oc;
 792
 793                                 /* check if, by chance, it's an undefined objectClass */
 794                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 795                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 796                                 {
 797                                         ber_dupbv( &pval, &oc->soc_cname );
 798                                         rc = LDAP_SUCCESS;
 799
 800                                 } else {
 801                                         ber_memfree( attr->a_vals[i].bv_val );
 802                                         if ( --last == i ) {
 803                                                 BER_BVZERO( &attr->a_vals[i] );
 804                                                 break;
 805                                         }
 806                                         attr->a_vals[i] = attr->a_vals[last];
 807                                         BER_BVZERO( &attr->a_vals[last] );
 808                                         i--;
 809                                 }
 810                         }
 811
 812                         if ( rc == LDAP_SUCCESS && pretty ) {
 813                                 ber_memfree( attr->a_vals[i].bv_val );
 814                                 attr->a_vals[i] = pval;
 815                         }
 816                 }
 817                 attr->a_numvals = last = i;
 818                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 819                         attr->a_nvals = NULL;
 820                         attr_free( attr );
 821                         goto next_attr;
 822                 }
 823
 824                 if ( last && attr->a_desc->ad_type->sat_equality &&
 825                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 826                 {
 827                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 828                         for ( i = 0; i < last; i++ ) {
 829                                 int             rc;
 830
 831                                 rc = ordered_value_normalize(
 832                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 833                                         attr->a_desc,
 834                                         attr->a_desc->ad_type->sat_equality,
 835                                         &attr->a_vals[i], &attr->a_nvals[i],
 836                                         NULL );
 837
 838                                 if ( rc != LDAP_SUCCESS ) {
 839                                         ber_memfree( attr->a_vals[i].bv_val );
 840                                         if ( --last == i ) {
 841                                                 BER_BVZERO( &attr->a_vals[i] );
 842                                                 break;
 843                                         }
 844                                         attr->a_vals[i] = attr->a_vals[last];
 845                                         BER_BVZERO( &attr->a_vals[last] );
 846                                         i--;
 847                                 }
 848                         }
 849                         BER_BVZERO( &attr->a_nvals[i] );
 850                         if ( last == 0 ) {
 851                                 attr_free( attr );
 852                                 goto next_attr;
 853                         }
 854
 855                 } else {
 856                         attr->a_nvals = attr->a_vals;
 857                 }
 858
 859                 attr->a_numvals = last;
 860
 861                 /* Handle sorted vals, strip dups but keep the attr */
 862                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 863                         while ( attr->a_numvals > 1 ) {
 864                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 865                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 866                                         break;
 867
 868                                 /* Strip duplicate values */
 869                                 if ( attr->a_nvals != attr->a_vals )
 870                                         ber_memfree( attr->a_nvals[i].bv_val );
 871                                 ber_memfree( attr->a_vals[i].bv_val );
 872                                 attr->a_numvals--;
 873
 874                                 assert( i >= 0 );
 875                                 if ( (unsigned)i < attr->a_numvals ) {
 876                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 877                                         if ( attr->a_nvals != attr->a_vals )
 878                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 879                                 }
 880                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 881                                 if ( attr->a_nvals != attr->a_vals )
 882                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 883                         }
 884                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 885                 }
 886
 887                 *attrp = attr;
 888                 attrp = &attr->a_next;
 889
 890 next_attr:;
 891         }
 892
 893         return LDAP_SUCCESS;
 894 }
 895
 896 /* return 0 IFF we can retrieve the entry with ndn
 897  */
 898 int
 899 ldap_back_entry_get(
 900                 Operation               *op,
 901                 struct berval           *ndn,
 902                 ObjectClass             *oc,
 903                 AttributeDescription    *at,
 904                 int                     rw,
 905                 Entry                   **ent )
 906 {
 907         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 908
 909         ldapconn_t      *lc = NULL;
 910         int             rc;
 911         struct berval   bdn;
 912         LDAPMessage     *result = NULL,
 913                         *e = NULL;
 914         char            *attr[3], **attrp = NULL;
 915         char            *filter = NULL;
 916         SlapReply       rs;
 917         int             do_retry = 1;
 918         LDAPControl     **ctrls = NULL;
 919         Operation op2 = *op;
 920
 921         *ent = NULL;
 922
 923         /* Tell getconn this is a privileged op */
 924         op2.o_do_not_cache = 1;
 925         /* use rootdn to be doubly explicit this is privileged */
 926         op2.o_dn = op->o_bd->be_rootdn;
 927         op2.o_ndn = op->o_bd->be_rootndn;
 928         /* ldap_back_entry_get() is an entry lookup, so it does not need
 929          * to know what the entry is being looked up for */
 930         op2.o_tag = LDAP_REQ_SEARCH;
 931         op2.o_ctrls = NULL;
 932         rc = ldap_back_dobind( &lc, &op2, &rs, LDAP_BACK_DONTSEND );
 933         if ( !rc ) {
 934                 return rs.sr_err;
 935         }
 936
 937         if ( at ) {
 938                 attrp = attr;
 939                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 940                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 941                         attr[1] = at->ad_cname.bv_val;
 942                         attr[2] = NULL;
 943
 944                 } else {
 945                         attr[0] = at->ad_cname.bv_val;
 946                         attr[1] = NULL;
 947                 }
 948         }
 949
 950         if ( oc ) {
 951                 char    *ptr;
 952
 953                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 954                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 955                 ptr = lutil_strcopy( filter, "(objectClass=" );
 956                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 957                 *ptr++ = ')';
 958                 *ptr++ = '\0';
 959         }
 960
 961 retry:
 962         ctrls = NULL;
 963         rc = ldap_back_controls_add( &op2, &rs, lc, &ctrls );
 964         if ( rc != LDAP_SUCCESS ) {
 965                 goto cleanup;
 966         }
 967
 968         /* TODO: timeout? */
 969         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 970                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 971                                 NULL, LDAP_NO_LIMIT, 0, &result );
 972         if ( rc != LDAP_SUCCESS ) {
 973                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 974                         do_retry = 0;
 975                         if ( ldap_back_retry( &lc, &op2, &rs, LDAP_BACK_DONTSEND ) ) {
 976                                 /* if the identity changed, there might be need to re-authz */
 977                                 (void)ldap_back_controls_free( &op2, &rs, &ctrls );
 978                                 goto retry;
 979                         }
 980                 }
 981                 goto cleanup;
 982         }
 983
 984         e = ldap_first_entry( lc->lc_ld, result );
 985         if ( e == NULL ) {
 986                 /* the entry exists, but it doesn't match the filter? */
 987                 goto cleanup;
 988         }
 989
 990         *ent = entry_alloc();
 991         if ( *ent == NULL ) {
 992                 rc = LDAP_NO_MEMORY;
 993                 goto cleanup;
 994         }
 995
 996         rc = ldap_build_entry( op, e, *ent, &bdn );
 997
 998         if ( rc != LDAP_SUCCESS ) {
 999                 entry_free( *ent );
1000                 *ent = NULL;
1001         }
1002
1003 cleanup:
1004         (void)ldap_back_controls_free( &op2, &rs, &ctrls );
1005
1006         if ( result ) {
1007                 ldap_msgfree( result );
1008         }
1009
1010         if ( filter ) {
1011                 op->o_tmpfree( filter, op->o_tmpmemctx );
1012         }
1013
1014         if ( lc != NULL ) {
1015                 ldap_back_release_conn( li, lc );
1016         }
1017
1018         return rc;
1019 }