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 1999-2012 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 && lc ) {
 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 && dont_retry == 0 ) {
 558                 if ( do_retry ) {
 559                         do_retry = 0;
 560                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 561                                 goto retry;
 562                         }
 563                 }
 564                 rs->sr_err = LDAP_SERVER_DOWN;
 565                 rs->sr_err = slap_map_api2result( rs );
 566                 goto finish;
 567         }
 568
 569         /*
 570          * Rewrite the matched portion of the search base, if required
 571          */
 572         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 573                 struct berval   pmatch;
 574
 575                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
 576                         pmatch.bv_val = match.bv_val;
 577                         match.bv_val = NULL;
 578                 }
 579                 rs->sr_matched = pmatch.bv_val;
 580                 rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 581         }
 582         if ( !BER_BVISNULL( &match ) ) {
 583                 ber_memfree( match.bv_val );
 584         }
 585
 586         if ( rs->sr_v2ref ) {
 587                 rs->sr_err = LDAP_REFERRAL;
 588         }
 589
 590 finish:;
 591         if ( LDAP_BACK_QUARANTINE( li ) ) {
 592                 ldap_back_quarantine( op, rs );
 593         }
 594
 595         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 596                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 597         }
 598
 599 #if 0
 600         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 601         if ( rc != SLAPD_ABANDON )
 602 #endif
 603         {
 604                 send_ldap_result( op, rs );
 605         }
 606
 607         (void)ldap_back_controls_free( op, rs, &ctrls );
 608
 609         if ( rs->sr_ctrls ) {
 610                 ldap_controls_free( rs->sr_ctrls );
 611                 rs->sr_ctrls = NULL;
 612         }
 613
 614         if ( rs->sr_text ) {
 615                 if ( freetext ) {
 616                         ber_memfree( (char *)rs->sr_text );
 617                 }
 618                 rs->sr_text = NULL;
 619         }
 620
 621         if ( rs->sr_ref ) {
 622                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 623                 rs->sr_ref = NULL;
 624         }
 625
 626         if ( references ) {
 627                 ber_memvfree( (void **)references );
 628         }
 629
 630         if ( attrs ) {
 631                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 632         }
 633
 634         if ( lc != NULL ) {
 635                 ldap_back_release_conn( li, lc );
 636         }
 637
 638         return rs->sr_err;
 639 }
 640
 641 static int
 642 ldap_build_entry(
 643                 Operation       *op,
 644                 LDAPMessage     *e,
 645                 Entry           *ent,
 646                 struct berval   *bdn )
 647 {
 648         struct berval   a;
 649         BerElement      ber = *ldap_get_message_ber( e );
 650         Attribute       *attr, **attrp;
 651         const char      *text;
 652         int             last;
 653         char *lastb;
 654         ber_len_t len;
 655
 656         /* safe assumptions ... */
 657         assert( ent != NULL );
 658         BER_BVZERO( &ent->e_bv );
 659
 660         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 661                 return LDAP_DECODING_ERROR;
 662         }
 663
 664         /*
 665          * Note: this may fail if the target host(s) schema differs
 666          * from the one known to the meta, and a DN with unknown
 667          * attributes is returned.
 668          *
 669          * FIXME: should we log anything, or delegate to dnNormalize?
 670          */
 671         /* Note: if the distinguished values or the naming attributes
 672          * change, should we massage them as well?
 673          */
 674         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 675                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 676         {
 677                 return LDAP_INVALID_DN_SYNTAX;
 678         }
 679
 680         ent->e_attrs = NULL;
 681         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 682                 return LDAP_SUCCESS;
 683         }
 684
 685         attrp = &ent->e_attrs;
 686         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 687                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 688                 int                             i;
 689                 slap_syntax_validate_func       *validate;
 690                 slap_syntax_transform_func      *pretty;
 691
 692                 attr = attr_alloc( NULL );
 693                 if ( attr == NULL ) {
 694                         return LDAP_OTHER;
 695                 }
 696                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 697                                 != LDAP_SUCCESS )
 698                 {
 699                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 700                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 701                         {
 702                                 Debug( LDAP_DEBUG_ANY,
 703                                         "%s ldap_build_entry: "
 704                                         "slap_bv2undef_ad(%s): %s\n",
 705                                         op->o_log_prefix, a.bv_val, text );
 706
 707                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 708                                 attr_free( attr );
 709                                 continue;
 710                         }
 711                 }
 712
 713                 /* no subschemaSubentry */
 714                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 715                         || attr->a_desc == slap_schema.si_ad_entryDN )
 716                 {
 717
 718                         /*
 719                          * We eat target's subschemaSubentry because
 720                          * a search for this value is likely not
 721                          * to resolve to the appropriate backend;
 722                          * later, the local subschemaSubentry is
 723                          * added.
 724                          *
 725                          * We also eat entryDN because the frontend
 726                          * will reattach it without checking if already
 727                          * present...
 728                          */
 729                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 730                         attr_free( attr );
 731                         continue;
 732                 }
 733
 734                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 735                                 || attr->a_vals == NULL )
 736                 {
 737                         /*
 738                          * Note: attr->a_vals can be null when using
 739                          * values result filter
 740                          */
 741                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 742                 }
 743
 744                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 745                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 746
 747                 if ( !validate && !pretty ) {
 748                         attr->a_nvals = NULL;
 749                         attr_free( attr );
 750                         goto next_attr;
 751                 }
 752
 753                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 754                 last = i;
 755
 756                 /*
 757                  * check that each value is valid per syntax
 758                  * and pretty if appropriate
 759                  */
 760                 for ( i = 0; i<last; i++ ) {
 761                         struct berval   pval;
 762                         int             rc;
 763
 764                         if ( pretty ) {
 765                                 rc = ordered_value_pretty( attr->a_desc,
 766                                         &attr->a_vals[i], &pval, NULL );
 767
 768                         } else {
 769                                 rc = ordered_value_validate( attr->a_desc,
 770                                         &attr->a_vals[i], 0 );
 771                         }
 772
 773                         if ( rc != LDAP_SUCCESS ) {
 774                                 ObjectClass *oc;
 775
 776                                 /* check if, by chance, it's an undefined objectClass */
 777                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 778                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 779                                 {
 780                                         ber_dupbv( &pval, &oc->soc_cname );
 781                                         rc = LDAP_SUCCESS;
 782
 783                                 } else {
 784                                         ber_memfree( attr->a_vals[i].bv_val );
 785                                         if ( --last == i ) {
 786                                                 BER_BVZERO( &attr->a_vals[i] );
 787                                                 break;
 788                                         }
 789                                         attr->a_vals[i] = attr->a_vals[last];
 790                                         BER_BVZERO( &attr->a_vals[last] );
 791                                         i--;
 792                                 }
 793                         }
 794
 795                         if ( rc == LDAP_SUCCESS && pretty ) {
 796                                 ber_memfree( attr->a_vals[i].bv_val );
 797                                 attr->a_vals[i] = pval;
 798                         }
 799                 }
 800                 attr->a_numvals = last = i;
 801                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 802                         attr->a_nvals = NULL;
 803                         attr_free( attr );
 804                         goto next_attr;
 805                 }
 806
 807                 if ( last && attr->a_desc->ad_type->sat_equality &&
 808                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 809                 {
 810                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 811                         for ( i = 0; i < last; i++ ) {
 812                                 int             rc;
 813
 814                                 rc = ordered_value_normalize(
 815                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 816                                         attr->a_desc,
 817                                         attr->a_desc->ad_type->sat_equality,
 818                                         &attr->a_vals[i], &attr->a_nvals[i],
 819                                         NULL );
 820
 821                                 if ( rc != LDAP_SUCCESS ) {
 822                                         ber_memfree( attr->a_vals[i].bv_val );
 823                                         if ( --last == i ) {
 824                                                 BER_BVZERO( &attr->a_vals[i] );
 825                                                 break;
 826                                         }
 827                                         attr->a_vals[i] = attr->a_vals[last];
 828                                         BER_BVZERO( &attr->a_vals[last] );
 829                                         i--;
 830                                 }
 831                         }
 832                         BER_BVZERO( &attr->a_nvals[i] );
 833                         if ( last == 0 ) {
 834                                 attr_free( attr );
 835                                 goto next_attr;
 836                         }
 837
 838                 } else {
 839                         attr->a_nvals = attr->a_vals;
 840                 }
 841
 842                 attr->a_numvals = last;
 843
 844                 /* Handle sorted vals, strip dups but keep the attr */
 845                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 846                         while ( attr->a_numvals > 1 ) {
 847                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 848                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 849                                         break;
 850
 851                                 /* Strip duplicate values */
 852                                 if ( attr->a_nvals != attr->a_vals )
 853                                         ber_memfree( attr->a_nvals[i].bv_val );
 854                                 ber_memfree( attr->a_vals[i].bv_val );
 855                                 attr->a_numvals--;
 856
 857                                 assert( i >= 0 );
 858                                 if ( (unsigned)i < attr->a_numvals ) {
 859                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 860                                         if ( attr->a_nvals != attr->a_vals )
 861                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 862                                 }
 863                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 864                                 if ( attr->a_nvals != attr->a_vals )
 865                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 866                         }
 867                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 868                 }
 869
 870                 *attrp = attr;
 871                 attrp = &attr->a_next;
 872
 873 next_attr:;
 874         }
 875
 876         return LDAP_SUCCESS;
 877 }
 878
 879 /* return 0 IFF we can retrieve the entry with ndn
 880  */
 881 int
 882 ldap_back_entry_get(
 883                 Operation               *op,
 884                 struct berval           *ndn,
 885                 ObjectClass             *oc,
 886                 AttributeDescription    *at,
 887                 int                     rw,
 888                 Entry                   **ent )
 889 {
 890         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 891
 892         ldapconn_t      *lc = NULL;
 893         int             rc,
 894                         do_not_cache;
 895         ber_tag_t       tag;
 896         struct berval   bdn;
 897         LDAPMessage     *result = NULL,
 898                         *e = NULL;
 899         char            *attr[3], **attrp = NULL;
 900         char            *filter = NULL;
 901         SlapReply       rs;
 902         int             do_retry = 1;
 903         LDAPControl     **ctrls = NULL;
 904
 905         *ent = NULL;
 906
 907         /* Tell getconn this is a privileged op */
 908         do_not_cache = op->o_do_not_cache;
 909         tag = op->o_tag;
 910         /* do not cache */
 911         op->o_do_not_cache = 1;
 912         /* ldap_back_entry_get() is an entry lookup, so it does not need
 913          * to know what the entry is being looked up for */
 914         op->o_tag = LDAP_REQ_SEARCH;
 915         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 916         op->o_do_not_cache = do_not_cache;
 917         op->o_tag = tag;
 918         if ( !rc ) {
 919                 return rs.sr_err;
 920         }
 921
 922         if ( at ) {
 923                 attrp = attr;
 924                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 925                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 926                         attr[1] = at->ad_cname.bv_val;
 927                         attr[2] = NULL;
 928
 929                 } else {
 930                         attr[0] = at->ad_cname.bv_val;
 931                         attr[1] = NULL;
 932                 }
 933         }
 934
 935         if ( oc ) {
 936                 char    *ptr;
 937
 938                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 939                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 940                 ptr = lutil_strcopy( filter, "(objectClass=" );
 941                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 942                 *ptr++ = ')';
 943                 *ptr++ = '\0';
 944         }
 945
 946 retry:
 947         ctrls = op->o_ctrls;
 948         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 949         if ( rc != LDAP_SUCCESS ) {
 950                 goto cleanup;
 951         }
 952
 953         /* TODO: timeout? */
 954         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 955                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 956                                 NULL, LDAP_NO_LIMIT, 0, &result );
 957         if ( rc != LDAP_SUCCESS ) {
 958                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 959                         do_retry = 0;
 960                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 961                                 /* if the identity changed, there might be need to re-authz */
 962                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 963                                 goto retry;
 964                         }
 965                 }
 966                 goto cleanup;
 967         }
 968
 969         e = ldap_first_entry( lc->lc_ld, result );
 970         if ( e == NULL ) {
 971                 /* the entry exists, but it doesn't match the filter? */
 972                 goto cleanup;
 973         }
 974
 975         *ent = entry_alloc();
 976         if ( *ent == NULL ) {
 977                 rc = LDAP_NO_MEMORY;
 978                 goto cleanup;
 979         }
 980
 981         rc = ldap_build_entry( op, e, *ent, &bdn );
 982
 983         if ( rc != LDAP_SUCCESS ) {
 984                 entry_free( *ent );
 985                 *ent = NULL;
 986         }
 987
 988 cleanup:
 989         (void)ldap_back_controls_free( op, &rs, &ctrls );
 990
 991         if ( result ) {
 992                 ldap_msgfree( result );
 993         }
 994
 995         if ( filter ) {
 996                 op->o_tmpfree( filter, op->o_tmpmemctx );
 997         }
 998
 999         if ( lc != NULL ) {
1000                 ldap_back_release_conn( li, lc );
1001         }
1002
1003         return rc;
1004 }