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 1999-2011 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         if ( rs->sr_err != LDAP_SUCCESS ) {
 240                 switch ( rs->sr_err ) {
 241                 case LDAP_SERVER_DOWN:
 242                         if ( do_retry ) {
 243                                 do_retry = 0;
 244                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 245                                         goto retry;
 246                                 }
 247                         }
 248
 249                         if ( lc == NULL ) {
 250                                 /* reset by ldap_back_retry ... */
 251                                 rs->sr_err = slap_map_api2result( rs );
 252
 253                         } else {
 254                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 255                         }
 256
 257                         goto finish;
 258
 259                 case LDAP_FILTER_ERROR:
 260                         /* first try? */
 261                         if ( !filter_undef &&
 262                                 strstr( filter.bv_val, "(?" ) &&
 263                                 !LDAP_BACK_NOUNDEFFILTER( li ) )
 264                         {
 265                                 BER_BVZERO( &filter );
 266                                 filter2bv_undef_x( op, op->ors_filter, 1, &filter );
 267                                 filter_undef = 1;
 268                                 goto retry;
 269                         }
 270
 271                         /* invalid filters return success with no data */
 272                         rs->sr_err = LDAP_SUCCESS;
 273                         rs->sr_text = NULL;
 274                         goto finish;
 275
 276                 default:
 277                         rs->sr_err = slap_map_api2result( rs );
 278                         rs->sr_text = NULL;
 279                         goto finish;
 280                 }
 281         }
 282
 283         /* if needed, initialize timeout */
 284         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 285                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 286                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 287                         tv.tv_usec = 0;
 288                 }
 289         }
 290
 291         /* We pull apart the ber result, stuff it into a slapd entry, and
 292          * let send_search_entry stuff it back into ber format. Slow & ugly,
 293          * but this is necessary for version matching, and for ACL processing.
 294          */
 295
 296         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 297         {
 298                 /* check for abandon */
 299                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 300                         if ( rc > 0 ) {
 301                                 ldap_msgfree( res );
 302                         }
 303                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 304                         rc = SLAPD_ABANDON;
 305                         goto finish;
 306                 }
 307
 308                 if ( rc == 0 || rc == -2 ) {
 309                         ldap_pvt_thread_yield();
 310
 311                         /* check timeout */
 312                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 313                                 if ( rc == 0 ) {
 314                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 315                                         rs->sr_text = "Operation timed out";
 316                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 317                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 318                                         goto finish;
 319                                 }
 320
 321                         } else {
 322                                 LDAP_BACK_TV_SET( &tv );
 323                         }
 324
 325                         /* check time limit */
 326                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 327                                         && slap_get_time() > stoptime )
 328                         {
 329                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 330                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 331                                 goto finish;
 332                         }
 333                         continue;
 334
 335                 } else {
 336                         /* only touch when activity actually took place... */
 337                         if ( li->li_idle_timeout && lc ) {
 338                                 lc->lc_time = op->o_time;
 339                         }
 340
 341                         /* don't retry any more */
 342                         dont_retry = 1;
 343                 }
 344
 345
 346                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 347                         Entry           ent = { 0 };
 348                         struct berval   bdn = BER_BVNULL;
 349
 350                         do_retry = 0;
 351
 352                         e = ldap_first_entry( lc->lc_ld, res );
 353                         rc = ldap_build_entry( op, e, &ent, &bdn );
 354                         if ( rc == LDAP_SUCCESS ) {
 355                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 356                                 rs->sr_entry = &ent;
 357                                 rs->sr_attrs = op->ors_attrs;
 358                                 rs->sr_operational_attrs = NULL;
 359                                 rs->sr_flags = 0;
 360                                 rs->sr_err = LDAP_SUCCESS;
 361                                 rc = rs->sr_err = send_search_entry( op, rs );
 362                                 if ( rs->sr_ctrls ) {
 363                                         ldap_controls_free( rs->sr_ctrls );
 364                                         rs->sr_ctrls = NULL;
 365                                 }
 366                                 rs->sr_entry = NULL;
 367                                 rs->sr_flags = 0;
 368                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 369                                         assert( ent.e_name.bv_val != bdn.bv_val );
 370                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 371                                         BER_BVZERO( &ent.e_name );
 372                                 }
 373                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 374                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 375                                         BER_BVZERO( &ent.e_nname );
 376                                 }
 377                                 entry_clean( &ent );
 378                         }
 379                         ldap_msgfree( res );
 380                         switch ( rc ) {
 381                         case LDAP_SUCCESS:
 382                         case LDAP_INSUFFICIENT_ACCESS:
 383                                 break;
 384
 385                         default:
 386                                 if ( rc == LDAP_UNAVAILABLE ) {
 387                                         rc = rs->sr_err = LDAP_OTHER;
 388                                 } else {
 389                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 390                                 }
 391                                 goto finish;
 392                         }
 393
 394                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 395                         if ( LDAP_BACK_NOREFS( li ) ) {
 396                                 ldap_msgfree( res );
 397                                 continue;
 398                         }
 399
 400                         do_retry = 0;
 401                         rc = ldap_parse_reference( lc->lc_ld, res,
 402                                         &references, &rs->sr_ctrls, 1 );
 403
 404                         if ( rc != LDAP_SUCCESS ) {
 405                                 continue;
 406                         }
 407
 408                         /* FIXME: there MUST be at least one */
 409                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 410                                 int             cnt;
 411
 412                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 413                                         /* NO OP */ ;
 414
 415                                 /* FIXME: there MUST be at least one */
 416                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 417                                         op->o_tmpmemctx );
 418
 419                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 420                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 421                                 }
 422                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 423
 424                                 /* ignore return value by now */
 425                                 RS_ASSERT( !(rs->sr_flags & REP_ENTRY_MASK) );
 426                                 rs->sr_entry = NULL;
 427                                 ( void )send_search_reference( op, rs );
 428
 429                         } else {
 430                                 Debug( LDAP_DEBUG_ANY,
 431                                         "%s ldap_back_search: "
 432                                         "got SEARCH_REFERENCE "
 433                                         "with no referrals\n",
 434                                         op->o_log_prefix, 0, 0 );
 435                         }
 436
 437                         /* cleanup */
 438                         if ( references ) {
 439                                 ber_memvfree( (void **)references );
 440                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 441                                 rs->sr_ref = NULL;
 442                                 references = NULL;
 443                         }
 444
 445                         if ( rs->sr_ctrls ) {
 446                                 ldap_controls_free( rs->sr_ctrls );
 447                                 rs->sr_ctrls = NULL;
 448                         }
 449
 450                 } else if ( rc == LDAP_RES_INTERMEDIATE ) {
 451                         /* FIXME: response controls
 452                          * are passed without checks */
 453                         rc = ldap_parse_intermediate( lc->lc_ld,
 454                                 res,
 455                                 (char **)&rs->sr_rspoid,
 456                                 &rs->sr_rspdata,
 457                                 &rs->sr_ctrls,
 458                                 0 );
 459                         if ( rc != LDAP_SUCCESS ) {
 460                                 continue;
 461                         }
 462
 463                         slap_send_ldap_intermediate( op, rs );
 464
 465                         if ( rs->sr_rspoid != NULL ) {
 466                                 ber_memfree( (char *)rs->sr_rspoid );
 467                                 rs->sr_rspoid = NULL;
 468                         }
 469
 470                         if ( rs->sr_rspdata != NULL ) {
 471                                 ber_bvfree( rs->sr_rspdata );
 472                                 rs->sr_rspdata = NULL;
 473                         }
 474
 475                         if ( rs->sr_ctrls != NULL ) {
 476                                 ldap_controls_free( rs->sr_ctrls );
 477                                 rs->sr_ctrls = NULL;
 478                         }
 479
 480                 } else {
 481                         char            *err = NULL;
 482
 483                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 484                                         &match.bv_val, &err,
 485                                         &references, &rs->sr_ctrls, 1 );
 486                         if ( rc == LDAP_SUCCESS ) {
 487                                 if ( err ) {
 488                                         rs->sr_text = err;
 489                                         freetext = 1;
 490                                 }
 491                         } else {
 492                                 rs->sr_err = rc;
 493                         }
 494                         rs->sr_err = slap_map_api2result( rs );
 495
 496                         /* RFC 4511: referrals can only appear
 497                          * if result code is LDAP_REFERRAL */
 498                         if ( references
 499                                 && references[ 0 ]
 500                                 && references[ 0 ][ 0 ] )
 501                         {
 502                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 503                                         Debug( LDAP_DEBUG_ANY,
 504                                                 "%s ldap_back_search: "
 505                                                 "got referrals with err=%d\n",
 506                                                 op->o_log_prefix,
 507                                                 rs->sr_err, 0 );
 508
 509                                 } else {
 510                                         int     cnt;
 511
 512                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 513                                                 /* NO OP */ ;
 514
 515                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 516                                                 op->o_tmpmemctx );
 517
 518                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 519                                                 /* duplicating ...*/
 520                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 521                                         }
 522                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 523                                 }
 524
 525                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 526                                 Debug( LDAP_DEBUG_ANY,
 527                                         "%s ldap_back_search: "
 528                                         "got err=%d with null "
 529                                         "or empty referrals\n",
 530                                         op->o_log_prefix,
 531                                         rs->sr_err, 0 );
 532
 533                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 534                         }
 535
 536                         if ( match.bv_val != NULL ) {
 537                                 match.bv_len = strlen( match.bv_val );
 538                         }
 539
 540                         rc = 0;
 541                         break;
 542                 }
 543
 544                 /* if needed, restore timeout */
 545                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 546                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 547                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 548                                 tv.tv_usec = 0;
 549                         }
 550                 }
 551         }
 552
 553         if ( rc == -1 && dont_retry == 0 ) {
 554                 if ( do_retry ) {
 555                         do_retry = 0;
 556                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 557                                 goto retry;
 558                         }
 559                 }
 560                 rs->sr_err = LDAP_SERVER_DOWN;
 561                 rs->sr_err = slap_map_api2result( rs );
 562                 goto finish;
 563         }
 564
 565         /*
 566          * Rewrite the matched portion of the search base, if required
 567          */
 568         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 569                 struct berval   pmatch;
 570
 571                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) != LDAP_SUCCESS ) {
 572                         pmatch.bv_val = match.bv_val;
 573                         match.bv_val = NULL;
 574                 }
 575                 rs->sr_matched = pmatch.bv_val;
 576                 rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 577         }
 578         if ( !BER_BVISNULL( &match ) ) {
 579                 ber_memfree( match.bv_val );
 580         }
 581
 582         if ( rs->sr_v2ref ) {
 583                 rs->sr_err = LDAP_REFERRAL;
 584         }
 585
 586 finish:;
 587         if ( LDAP_BACK_QUARANTINE( li ) ) {
 588                 ldap_back_quarantine( op, rs );
 589         }
 590
 591         if ( filter.bv_val != op->ors_filterstr.bv_val ) {
 592                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 593         }
 594
 595 #if 0
 596         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 597         if ( rc != SLAPD_ABANDON )
 598 #endif
 599         {
 600                 send_ldap_result( op, rs );
 601         }
 602
 603         (void)ldap_back_controls_free( op, rs, &ctrls );
 604
 605         if ( rs->sr_ctrls ) {
 606                 ldap_controls_free( rs->sr_ctrls );
 607                 rs->sr_ctrls = NULL;
 608         }
 609
 610         if ( rs->sr_text ) {
 611                 if ( freetext ) {
 612                         ber_memfree( (char *)rs->sr_text );
 613                 }
 614                 rs->sr_text = NULL;
 615         }
 616
 617         if ( rs->sr_ref ) {
 618                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 619                 rs->sr_ref = NULL;
 620         }
 621
 622         if ( references ) {
 623                 ber_memvfree( (void **)references );
 624         }
 625
 626         if ( attrs ) {
 627                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 628         }
 629
 630         if ( lc != NULL ) {
 631                 ldap_back_release_conn( li, lc );
 632         }
 633
 634         return rs->sr_err;
 635 }
 636
 637 static int
 638 ldap_build_entry(
 639                 Operation       *op,
 640                 LDAPMessage     *e,
 641                 Entry           *ent,
 642                 struct berval   *bdn )
 643 {
 644         struct berval   a;
 645         BerElement      ber = *ldap_get_message_ber( e );
 646         Attribute       *attr, **attrp;
 647         const char      *text;
 648         int             last;
 649         char *lastb;
 650         ber_len_t len;
 651
 652         /* safe assumptions ... */
 653         assert( ent != NULL );
 654         BER_BVZERO( &ent->e_bv );
 655
 656         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 657                 return LDAP_DECODING_ERROR;
 658         }
 659
 660         /*
 661          * Note: this may fail if the target host(s) schema differs
 662          * from the one known to the meta, and a DN with unknown
 663          * attributes is returned.
 664          *
 665          * FIXME: should we log anything, or delegate to dnNormalize?
 666          */
 667         /* Note: if the distinguished values or the naming attributes
 668          * change, should we massage them as well?
 669          */
 670         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 671                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 672         {
 673                 return LDAP_INVALID_DN_SYNTAX;
 674         }
 675
 676         ent->e_attrs = NULL;
 677         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 678                 return LDAP_SUCCESS;
 679         }
 680
 681         attrp = &ent->e_attrs;
 682         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 683                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 684                 int                             i;
 685                 slap_syntax_validate_func       *validate;
 686                 slap_syntax_transform_func      *pretty;
 687
 688                 attr = attr_alloc( NULL );
 689                 if ( attr == NULL ) {
 690                         return LDAP_OTHER;
 691                 }
 692                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 693                                 != LDAP_SUCCESS )
 694                 {
 695                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 696                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 697                         {
 698                                 Debug( LDAP_DEBUG_ANY,
 699                                         "%s ldap_build_entry: "
 700                                         "slap_bv2undef_ad(%s): %s\n",
 701                                         op->o_log_prefix, a.bv_val, text );
 702
 703                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 704                                 attr_free( attr );
 705                                 continue;
 706                         }
 707                 }
 708
 709                 /* no subschemaSubentry */
 710                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 711                         || attr->a_desc == slap_schema.si_ad_entryDN )
 712                 {
 713
 714                         /*
 715                          * We eat target's subschemaSubentry because
 716                          * a search for this value is likely not
 717                          * to resolve to the appropriate backend;
 718                          * later, the local subschemaSubentry is
 719                          * added.
 720                          *
 721                          * We also eat entryDN because the frontend
 722                          * will reattach it without checking if already
 723                          * present...
 724                          */
 725                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 726                         attr_free( attr );
 727                         continue;
 728                 }
 729
 730                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 731                                 || attr->a_vals == NULL )
 732                 {
 733                         /*
 734                          * Note: attr->a_vals can be null when using
 735                          * values result filter
 736                          */
 737                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 738                 }
 739
 740                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 741                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 742
 743                 if ( !validate && !pretty ) {
 744                         attr->a_nvals = NULL;
 745                         attr_free( attr );
 746                         goto next_attr;
 747                 }
 748
 749                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 750                 last = i;
 751
 752                 /*
 753                  * check that each value is valid per syntax
 754                  * and pretty if appropriate
 755                  */
 756                 for ( i = 0; i<last; i++ ) {
 757                         struct berval   pval;
 758                         int             rc;
 759
 760                         if ( pretty ) {
 761                                 rc = ordered_value_pretty( attr->a_desc,
 762                                         &attr->a_vals[i], &pval, NULL );
 763
 764                         } else {
 765                                 rc = ordered_value_validate( attr->a_desc,
 766                                         &attr->a_vals[i], 0 );
 767                         }
 768
 769                         if ( rc != LDAP_SUCCESS ) {
 770                                 ObjectClass *oc;
 771
 772                                 /* check if, by chance, it's an undefined objectClass */
 773                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 774                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 775                                 {
 776                                         ber_dupbv( &pval, &oc->soc_cname );
 777                                         rc = LDAP_SUCCESS;
 778
 779                                 } else {
 780                                         ber_memfree( attr->a_vals[i].bv_val );
 781                                         if ( --last == i ) {
 782                                                 BER_BVZERO( &attr->a_vals[i] );
 783                                                 break;
 784                                         }
 785                                         attr->a_vals[i] = attr->a_vals[last];
 786                                         BER_BVZERO( &attr->a_vals[last] );
 787                                         i--;
 788                                 }
 789                         }
 790
 791                         if ( rc == LDAP_SUCCESS && pretty ) {
 792                                 ber_memfree( attr->a_vals[i].bv_val );
 793                                 attr->a_vals[i] = pval;
 794                         }
 795                 }
 796                 attr->a_numvals = last = i;
 797                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 798                         attr->a_nvals = NULL;
 799                         attr_free( attr );
 800                         goto next_attr;
 801                 }
 802
 803                 if ( last && attr->a_desc->ad_type->sat_equality &&
 804                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 805                 {
 806                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 807                         for ( i = 0; i < last; i++ ) {
 808                                 int             rc;
 809
 810                                 rc = ordered_value_normalize(
 811                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 812                                         attr->a_desc,
 813                                         attr->a_desc->ad_type->sat_equality,
 814                                         &attr->a_vals[i], &attr->a_nvals[i],
 815                                         NULL );
 816
 817                                 if ( rc != LDAP_SUCCESS ) {
 818                                         ber_memfree( attr->a_vals[i].bv_val );
 819                                         if ( --last == i ) {
 820                                                 BER_BVZERO( &attr->a_vals[i] );
 821                                                 break;
 822                                         }
 823                                         attr->a_vals[i] = attr->a_vals[last];
 824                                         BER_BVZERO( &attr->a_vals[last] );
 825                                         i--;
 826                                 }
 827                         }
 828                         BER_BVZERO( &attr->a_nvals[i] );
 829                         if ( last == 0 ) {
 830                                 attr_free( attr );
 831                                 goto next_attr;
 832                         }
 833
 834                 } else {
 835                         attr->a_nvals = attr->a_vals;
 836                 }
 837
 838                 attr->a_numvals = last;
 839
 840                 /* Handle sorted vals, strip dups but keep the attr */
 841                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 842                         while ( attr->a_numvals > 1 ) {
 843                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 844                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 845                                         break;
 846
 847                                 /* Strip duplicate values */
 848                                 if ( attr->a_nvals != attr->a_vals )
 849                                         ber_memfree( attr->a_nvals[i].bv_val );
 850                                 ber_memfree( attr->a_vals[i].bv_val );
 851                                 attr->a_numvals--;
 852
 853                                 assert( i >= 0 );
 854                                 if ( (unsigned)i < attr->a_numvals ) {
 855                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 856                                         if ( attr->a_nvals != attr->a_vals )
 857                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 858                                 }
 859                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 860                                 if ( attr->a_nvals != attr->a_vals )
 861                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 862                         }
 863                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 864                 }
 865
 866                 *attrp = attr;
 867                 attrp = &attr->a_next;
 868
 869 next_attr:;
 870         }
 871
 872         return LDAP_SUCCESS;
 873 }
 874
 875 /* return 0 IFF we can retrieve the entry with ndn
 876  */
 877 int
 878 ldap_back_entry_get(
 879                 Operation               *op,
 880                 struct berval           *ndn,
 881                 ObjectClass             *oc,
 882                 AttributeDescription    *at,
 883                 int                     rw,
 884                 Entry                   **ent )
 885 {
 886         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 887
 888         ldapconn_t      *lc = NULL;
 889         int             rc,
 890                         do_not_cache;
 891         ber_tag_t       tag;
 892         struct berval   bdn;
 893         LDAPMessage     *result = NULL,
 894                         *e = NULL;
 895         char            *attr[3], **attrp = NULL;
 896         char            *filter = NULL;
 897         SlapReply       rs;
 898         int             do_retry = 1;
 899         LDAPControl     **ctrls = NULL;
 900
 901         *ent = NULL;
 902
 903         /* Tell getconn this is a privileged op */
 904         do_not_cache = op->o_do_not_cache;
 905         tag = op->o_tag;
 906         /* do not cache */
 907         op->o_do_not_cache = 1;
 908         /* ldap_back_entry_get() is an entry lookup, so it does not need
 909          * to know what the entry is being looked up for */
 910         op->o_tag = LDAP_REQ_SEARCH;
 911         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 912         op->o_do_not_cache = do_not_cache;
 913         op->o_tag = tag;
 914         if ( !rc ) {
 915                 return rs.sr_err;
 916         }
 917
 918         if ( at ) {
 919                 attrp = attr;
 920                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 921                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 922                         attr[1] = at->ad_cname.bv_val;
 923                         attr[2] = NULL;
 924
 925                 } else {
 926                         attr[0] = at->ad_cname.bv_val;
 927                         attr[1] = NULL;
 928                 }
 929         }
 930
 931         if ( oc ) {
 932                 char    *ptr;
 933
 934                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 935                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 936                 ptr = lutil_strcopy( filter, "(objectClass=" );
 937                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 938                 *ptr++ = ')';
 939                 *ptr++ = '\0';
 940         }
 941
 942 retry:
 943         ctrls = op->o_ctrls;
 944         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 945         if ( rc != LDAP_SUCCESS ) {
 946                 goto cleanup;
 947         }
 948
 949         /* TODO: timeout? */
 950         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 951                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 952                                 NULL, LDAP_NO_LIMIT, 0, &result );
 953         if ( rc != LDAP_SUCCESS ) {
 954                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 955                         do_retry = 0;
 956                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 957                                 /* if the identity changed, there might be need to re-authz */
 958                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 959                                 goto retry;
 960                         }
 961                 }
 962                 goto cleanup;
 963         }
 964
 965         e = ldap_first_entry( lc->lc_ld, result );
 966         if ( e == NULL ) {
 967                 /* the entry exists, but it doesn't match the filter? */
 968                 goto cleanup;
 969         }
 970
 971         *ent = entry_alloc();
 972         if ( *ent == NULL ) {
 973                 rc = LDAP_NO_MEMORY;
 974                 goto cleanup;
 975         }
 976
 977         rc = ldap_build_entry( op, e, *ent, &bdn );
 978
 979         if ( rc != LDAP_SUCCESS ) {
 980                 entry_free( *ent );
 981                 *ent = NULL;
 982         }
 983
 984 cleanup:
 985         (void)ldap_back_controls_free( op, &rs, &ctrls );
 986
 987         if ( result ) {
 988                 ldap_msgfree( result );
 989         }
 990
 991         if ( filter ) {
 992                 op->o_tmpfree( filter, op->o_tmpmemctx );
 993         }
 994
 995         if ( lc != NULL ) {
 996                 ldap_back_release_conn( li, lc );
 997         }
 998
 999         return rc;
1000 }