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 1999-2009 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn );
  42
  43 /*
  44  * Quick'n'dirty rewrite of filter in case of error, to deal with
  45  * <draft-zeilenga-ldap-t-f>.
  46  */
  47 static int
  48 ldap_back_munge_filter(
  49         Operation       *op,
  50         struct berval   *filter,
  51         int     *freeit )
  52 {
  53         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
  54
  55         char            *ptr;
  56         int             gotit = 0;
  57
  58         Debug( LDAP_DEBUG_ARGS, "=> ldap_back_munge_filter \"%s\"\n",
  59                         filter->bv_val, 0, 0 );
  60
  61         for ( ptr = strstr( filter->bv_val, "(?=" );
  62                         ptr;
  63                         ptr = strstr( ptr, "(?=" ) )
  64         {
  65                 static struct berval
  66                         bv_true = BER_BVC( "(?=true)" ),
  67                         bv_false = BER_BVC( "(?=false)" ),
  68                         bv_undefined = BER_BVC( "(?=undefined)" ),
  69                         bv_t = BER_BVC( "(&)" ),
  70                         bv_f = BER_BVC( "(|)" ),
  71                         bv_T = BER_BVC( "(objectClass=*)" ),
  72                         bv_F = BER_BVC( "(!(objectClass=*))" );
  73                 struct berval   *oldbv = NULL,
  74                                 *newbv = NULL,
  75                                 oldfilter = BER_BVNULL;
  76
  77                 if ( strncmp( ptr, bv_true.bv_val, bv_true.bv_len ) == 0 ) {
  78                         oldbv = &bv_true;
  79                         if ( LDAP_BACK_T_F( li ) ) {
  80                                 newbv = &bv_t;
  81
  82                         } else {
  83                                 newbv = &bv_T;
  84                         }
  85
  86                 } else if ( strncmp( ptr, bv_false.bv_val, bv_false.bv_len ) == 0 )
  87                 {
  88                         oldbv = &bv_false;
  89                         if ( LDAP_BACK_T_F( li ) ) {
  90                                 newbv = &bv_f;
  91
  92                         } else {
  93                                 newbv = &bv_F;
  94                         }
  95
  96                 } else if ( strncmp( ptr, bv_undefined.bv_val, bv_undefined.bv_len ) == 0 )
  97                 {
  98                         /* if undef or invalid filter is not allowed,
  99                          * don't rewrite filter */
 100                         if ( LDAP_BACK_NOUNDEFFILTER( li ) ) {
 101                                 if ( filter->bv_val != op->ors_filterstr.bv_val ) {
 102                                         op->o_tmpfree( filter->bv_val, op->o_tmpmemctx );
 103                                 }
 104                                 BER_BVZERO( filter );
 105                                 gotit = -1;
 106                                 goto done;
 107                         }
 108
 109                         oldbv = &bv_undefined;
 110                         newbv = &bv_F;
 111
 112                 } else {
 113                         gotit = 0;
 114                         goto done;
 115                 }
 116
 117                 oldfilter = *filter;
 118                 filter->bv_len += newbv->bv_len - oldbv->bv_len;
 119                 if ( filter->bv_val == op->ors_filterstr.bv_val ) {
 120                         filter->bv_val = op->o_tmpalloc( filter->bv_len + 1,
 121                                         op->o_tmpmemctx );
 122
 123                         AC_MEMCPY( filter->bv_val, op->ors_filterstr.bv_val,
 124                                         op->ors_filterstr.bv_len + 1 );
 125
 126                         *freeit = 1;
 127                 } else {
 128                         filter->bv_val = op->o_tmprealloc( filter->bv_val,
 129                                         filter->bv_len + 1, op->o_tmpmemctx );
 130                 }
 131
 132                 ptr = filter->bv_val + ( ptr - oldfilter.bv_val );
 133
 134                 AC_MEMCPY( &ptr[ newbv->bv_len ],
 135                                 &ptr[ oldbv->bv_len ],
 136                                 oldfilter.bv_len - ( ptr - filter->bv_val ) - oldbv->bv_len + 1 );
 137                 AC_MEMCPY( ptr, newbv->bv_val, newbv->bv_len );
 138
 139                 ptr += newbv->bv_len;
 140                 gotit = 1;
 141         }
 142
 143 done:;
 144         Debug( LDAP_DEBUG_ARGS, "<= ldap_back_munge_filter \"%s\" (%d)\n",
 145                         filter->bv_val, gotit, 0 );
 146
 147         return gotit;
 148 }
 149
 150 int
 151 ldap_back_search(
 152                 Operation       *op,
 153                 SlapReply       *rs )
 154 {
 155         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 156
 157         ldapconn_t      *lc = NULL;
 158         struct timeval  tv;
 159         time_t          stoptime = (time_t)(-1);
 160         LDAPMessage     *res,
 161                         *e;
 162         int             rc = 0,
 163                         msgid;
 164         struct berval   match = BER_BVNULL,
 165                         filter = BER_BVNULL;
 166         int             i;
 167         char            **attrs = NULL;
 168         int             freetext = 0, freefilter = 0;
 169         int             do_retry = 1, dont_retry = 0;
 170         LDAPControl     **ctrls = NULL;
 171         char            **references = NULL;
 172
 173         /* FIXME: shouldn't this be null? */
 174         const char      *save_matched = rs->sr_matched;
 175
 176         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 177                 return rs->sr_err;
 178         }
 179
 180         /*
 181          * FIXME: in case of values return filter, we might want
 182          * to map attrs and maybe rewrite value
 183          */
 184
 185         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 186                 tv.tv_sec = op->ors_tlimit;
 187                 tv.tv_usec = 0;
 188                 stoptime = op->o_time + op->ors_tlimit;
 189
 190         } else {
 191                 LDAP_BACK_TV_SET( &tv );
 192         }
 193
 194         if ( op->ors_attrs ) {
 195                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 196                         /* just count attrs */ ;
 197
 198                 attrs = ch_malloc( ( i + 1 )*sizeof( char * ) );
 199                 if ( attrs == NULL ) {
 200                         rs->sr_err = LDAP_NO_MEMORY;
 201                         rc = -1;
 202                         goto finish;
 203                 }
 204
 205                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 206                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 207                 }
 208                 attrs[ i ] = NULL;
 209         }
 210
 211         ctrls = op->o_ctrls;
 212         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 213         if ( rc != LDAP_SUCCESS ) {
 214                 goto finish;
 215         }
 216
 217         /* deal with <draft-zeilenga-ldap-t-f> filters */
 218         filter = op->ors_filterstr;
 219 retry:
 220         rs->sr_err = ldap_pvt_search( lc->lc_ld, op->o_req_dn.bv_val,
 221                         op->ors_scope, filter.bv_val,
 222                         attrs, op->ors_attrsonly, ctrls, NULL,
 223                         tv.tv_sec ? &tv : NULL,
 224                         op->ors_slimit, op->ors_deref, &msgid );
 225
 226         if ( rs->sr_err != LDAP_SUCCESS ) {
 227                 switch ( rs->sr_err ) {
 228                 case LDAP_SERVER_DOWN:
 229                         if ( do_retry ) {
 230                                 do_retry = 0;
 231                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 232                                         goto retry;
 233                                 }
 234                         }
 235
 236                         if ( lc == NULL ) {
 237                                 /* reset by ldap_back_retry ... */
 238                                 rs->sr_err = slap_map_api2result( rs );
 239
 240                         } else {
 241                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 242                         }
 243
 244                         goto finish;
 245
 246                 case LDAP_FILTER_ERROR:
 247                         if (ldap_back_munge_filter( op, &filter, &freefilter ) > 0 ) {
 248                                 goto retry;
 249                         }
 250
 251                         /* invalid filters return success with no data */
 252                         rs->sr_err = LDAP_SUCCESS;
 253                         rs->sr_text = NULL;
 254                         goto finish;
 255
 256                 default:
 257                         rs->sr_err = slap_map_api2result( rs );
 258                         rs->sr_text = NULL;
 259                         goto finish;
 260                 }
 261         }
 262
 263         /* if needed, initialize timeout */
 264         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 265                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 266                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 267                         tv.tv_usec = 0;
 268                 }
 269         }
 270
 271         /* We pull apart the ber result, stuff it into a slapd entry, and
 272          * let send_search_entry stuff it back into ber format. Slow & ugly,
 273          * but this is necessary for version matching, and for ACL processing.
 274          */
 275
 276         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 277         {
 278                 /* check for abandon */
 279                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 280                         if ( rc > 0 ) {
 281                                 ldap_msgfree( res );
 282                         }
 283                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 284                         rc = SLAPD_ABANDON;
 285                         goto finish;
 286                 }
 287
 288                 if ( rc == 0 || rc == -2 ) {
 289                         ldap_pvt_thread_yield();
 290
 291                         /* check timeout */
 292                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 293                                 if ( rc == 0 ) {
 294                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 295                                         rs->sr_text = "Operation timed out";
 296                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 297                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 298                                         goto finish;
 299                                 }
 300
 301                         } else {
 302                                 LDAP_BACK_TV_SET( &tv );
 303                         }
 304
 305                         /* check time limit */
 306                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 307                                         && slap_get_time() > stoptime )
 308                         {
 309                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 310                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 311                                 goto finish;
 312                         }
 313                         continue;
 314
 315                 } else {
 316                         /* only touch when activity actually took place... */
 317                         if ( li->li_idle_timeout && lc ) {
 318                                 lc->lc_time = op->o_time;
 319                         }
 320
 321                         /* don't retry any more */
 322                         dont_retry = 1;
 323                 }
 324
 325
 326                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 327                         Entry           ent = { 0 };
 328                         struct berval   bdn = BER_BVNULL;
 329
 330                         do_retry = 0;
 331
 332                         e = ldap_first_entry( lc->lc_ld, res );
 333                         rc = ldap_build_entry( op, e, &ent, &bdn );
 334                         if ( rc == LDAP_SUCCESS ) {
 335                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 336                                 rs->sr_entry = &ent;
 337                                 rs->sr_attrs = op->ors_attrs;
 338                                 rs->sr_operational_attrs = NULL;
 339                                 rs->sr_flags = 0;
 340                                 rs->sr_err = LDAP_SUCCESS;
 341                                 rc = rs->sr_err = send_search_entry( op, rs );
 342                                 if ( rs->sr_ctrls ) {
 343                                         ldap_controls_free( rs->sr_ctrls );
 344                                         rs->sr_ctrls = NULL;
 345                                 }
 346                                 rs->sr_entry = NULL;
 347                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 348                                         assert( ent.e_name.bv_val != bdn.bv_val );
 349                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 350                                         BER_BVZERO( &ent.e_name );
 351                                 }
 352                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 353                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 354                                         BER_BVZERO( &ent.e_nname );
 355                                 }
 356                                 entry_clean( &ent );
 357                         }
 358                         ldap_msgfree( res );
 359                         switch ( rc ) {
 360                         case LDAP_SUCCESS:
 361                         case LDAP_INSUFFICIENT_ACCESS:
 362                                 break;
 363
 364                         default:
 365                                 if ( rc == LDAP_UNAVAILABLE ) {
 366                                         rc = rs->sr_err = LDAP_OTHER;
 367                                 } else {
 368                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 369                                 }
 370                                 goto finish;
 371                         }
 372
 373                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 374                         if ( LDAP_BACK_NOREFS( li ) ) {
 375                                 ldap_msgfree( res );
 376                                 continue;
 377                         }
 378
 379                         do_retry = 0;
 380                         rc = ldap_parse_reference( lc->lc_ld, res,
 381                                         &references, &rs->sr_ctrls, 1 );
 382
 383                         if ( rc != LDAP_SUCCESS ) {
 384                                 continue;
 385                         }
 386
 387                         /* FIXME: there MUST be at least one */
 388                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 389                                 int             cnt;
 390
 391                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 392                                         /* NO OP */ ;
 393
 394                                 /* FIXME: there MUST be at least one */
 395                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 396                                         op->o_tmpmemctx );
 397
 398                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 399                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 400                                 }
 401                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 402
 403                                 /* ignore return value by now */
 404                                 rs->sr_entry = NULL;
 405                                 ( void )send_search_reference( op, rs );
 406
 407                         } else {
 408                                 Debug( LDAP_DEBUG_ANY,
 409                                         "%s ldap_back_search: "
 410                                         "got SEARCH_REFERENCE "
 411                                         "with no referrals\n",
 412                                         op->o_log_prefix, 0, 0 );
 413                         }
 414
 415                         /* cleanup */
 416                         if ( references ) {
 417                                 ber_memvfree( (void **)references );
 418                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 419                                 rs->sr_ref = NULL;
 420                                 references = NULL;
 421                         }
 422
 423                         if ( rs->sr_ctrls ) {
 424                                 ldap_controls_free( rs->sr_ctrls );
 425                                 rs->sr_ctrls = NULL;
 426                         }
 427
 428                 } else if ( rc == LDAP_RES_INTERMEDIATE ) {
 429                         /* FIXME: response controls
 430                          * are passed without checks */
 431                         rc = ldap_parse_intermediate( lc->lc_ld,
 432                                 res,
 433                                 (char **)&rs->sr_rspoid,
 434                                 &rs->sr_rspdata,
 435                                 &rs->sr_ctrls,
 436                                 0 );
 437                         if ( rc != LDAP_SUCCESS ) {
 438                                 continue;
 439                         }
 440
 441                         slap_send_ldap_intermediate( op, rs );
 442
 443                         if ( rs->sr_rspoid != NULL ) {
 444                                 ber_memfree( (char *)rs->sr_rspoid );
 445                                 rs->sr_rspoid = NULL;
 446                         }
 447
 448                         if ( rs->sr_rspdata != NULL ) {
 449                                 ber_bvfree( rs->sr_rspdata );
 450                                 rs->sr_rspdata = NULL;
 451                         }
 452
 453                         if ( rs->sr_ctrls != NULL ) {
 454                                 ldap_controls_free( rs->sr_ctrls );
 455                                 rs->sr_ctrls = NULL;
 456                         }
 457
 458                 } else {
 459                         char            *err = NULL;
 460
 461                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 462                                         &match.bv_val, &err,
 463                                         &references, &rs->sr_ctrls, 1 );
 464                         if ( rc != LDAP_SUCCESS ) {
 465                                 rs->sr_err = rc;
 466                         }
 467                         rs->sr_err = slap_map_api2result( rs );
 468                         if ( err ) {
 469                                 rs->sr_text = err;
 470                                 freetext = 1;
 471                         }
 472
 473                         /* RFC 4511: referrals can only appear
 474                          * if result code is LDAP_REFERRAL */
 475                         if ( references
 476                                 && references[ 0 ]
 477                                 && references[ 0 ][ 0 ] )
 478                         {
 479                                 if ( rs->sr_err != LDAP_REFERRAL ) {
 480                                         Debug( LDAP_DEBUG_ANY,
 481                                                 "%s ldap_back_search: "
 482                                                 "got referrals with err=%d\n",
 483                                                 op->o_log_prefix,
 484                                                 rs->sr_err, 0 );
 485
 486                                 } else {
 487                                         int     cnt;
 488
 489                                         for ( cnt = 0; references[ cnt ]; cnt++ )
 490                                                 /* NO OP */ ;
 491
 492                                         rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 493                                                 op->o_tmpmemctx );
 494
 495                                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 496                                                 /* duplicating ...*/
 497                                                 ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 498                                         }
 499                                         BER_BVZERO( &rs->sr_ref[ cnt ] );
 500                                 }
 501
 502                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
 503                                 Debug( LDAP_DEBUG_ANY,
 504                                         "%s ldap_back_search: "
 505                                         "got err=%d with null "
 506                                         "or empty referrals\n",
 507                                         op->o_log_prefix,
 508                                         rs->sr_err, 0 );
 509
 510                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 511                         }
 512
 513                         if ( match.bv_val != NULL ) {
 514                                 match.bv_len = strlen( match.bv_val );
 515                         }
 516
 517                         rc = 0;
 518                         break;
 519                 }
 520
 521                 /* if needed, restore timeout */
 522                 if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 523                         if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 524                                 tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 525                                 tv.tv_usec = 0;
 526                         }
 527                 }
 528         }
 529
 530         if ( rc == -1 && dont_retry == 0 ) {
 531                 if ( do_retry ) {
 532                         do_retry = 0;
 533                         if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 534                                 goto retry;
 535                         }
 536                 }
 537                 rs->sr_err = LDAP_SERVER_DOWN;
 538                 rs->sr_err = slap_map_api2result( rs );
 539                 goto finish;
 540         }
 541
 542         /*
 543          * Rewrite the matched portion of the search base, if required
 544          */
 545         if ( !BER_BVISNULL( &match ) && !BER_BVISEMPTY( &match ) ) {
 546                 struct berval   pmatch;
 547
 548                 if ( dnPretty( NULL, &match, &pmatch, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
 549                         rs->sr_matched = pmatch.bv_val;
 550                         LDAP_FREE( match.bv_val );
 551
 552                 } else {
 553                         rs->sr_matched = match.bv_val;
 554                 }
 555         }
 556
 557         if ( rs->sr_v2ref ) {
 558                 rs->sr_err = LDAP_REFERRAL;
 559         }
 560
 561 finish:;
 562         if ( LDAP_BACK_QUARANTINE( li ) ) {
 563                 ldap_back_quarantine( op, rs );
 564         }
 565
 566         if ( freefilter && filter.bv_val != op->ors_filterstr.bv_val ) {
 567                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 568         }
 569
 570 #if 0
 571         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 572         if ( rc != SLAPD_ABANDON )
 573 #endif
 574         {
 575                 send_ldap_result( op, rs );
 576         }
 577
 578         (void)ldap_back_controls_free( op, rs, &ctrls );
 579
 580         if ( rs->sr_ctrls ) {
 581                 ldap_controls_free( rs->sr_ctrls );
 582                 rs->sr_ctrls = NULL;
 583         }
 584
 585         if ( rs->sr_matched != NULL && rs->sr_matched != save_matched ) {
 586                 if ( rs->sr_matched != match.bv_val ) {
 587                         ber_memfree_x( (char *)rs->sr_matched, op->o_tmpmemctx );
 588
 589                 } else {
 590                         LDAP_FREE( match.bv_val );
 591                 }
 592                 rs->sr_matched = save_matched;
 593         }
 594
 595         if ( rs->sr_text ) {
 596                 if ( freetext ) {
 597                         LDAP_FREE( (char *)rs->sr_text );
 598                 }
 599                 rs->sr_text = NULL;
 600         }
 601
 602         if ( rs->sr_ref ) {
 603                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 604                 rs->sr_ref = NULL;
 605         }
 606
 607         if ( references ) {
 608                 ber_memvfree( (void **)references );
 609         }
 610
 611         if ( attrs ) {
 612                 ch_free( attrs );
 613         }
 614
 615         if ( lc != NULL ) {
 616                 ldap_back_release_conn( li, lc );
 617         }
 618
 619         return rs->sr_err;
 620 }
 621
 622 static int
 623 ldap_build_entry(
 624                 Operation       *op,
 625                 LDAPMessage     *e,
 626                 Entry           *ent,
 627                 struct berval   *bdn )
 628 {
 629         struct berval   a;
 630         BerElement      ber = *e->lm_ber;
 631         Attribute       *attr, **attrp;
 632         const char      *text;
 633         int             last;
 634         char *lastb;
 635         ber_len_t len;
 636
 637         /* safe assumptions ... */
 638         assert( ent != NULL );
 639         BER_BVZERO( &ent->e_bv );
 640
 641         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 642                 return LDAP_DECODING_ERROR;
 643         }
 644
 645         /*
 646          * Note: this may fail if the target host(s) schema differs
 647          * from the one known to the meta, and a DN with unknown
 648          * attributes is returned.
 649          *
 650          * FIXME: should we log anything, or delegate to dnNormalize?
 651          */
 652         /* Note: if the distinguished values or the naming attributes
 653          * change, should we massage them as well?
 654          */
 655         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 656                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 657         {
 658                 return LDAP_INVALID_DN_SYNTAX;
 659         }
 660
 661         ent->e_attrs = NULL;
 662         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 663                 return LDAP_SUCCESS;
 664         }
 665
 666         attrp = &ent->e_attrs;
 667         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 668                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 669                 int                             i;
 670                 slap_syntax_validate_func       *validate;
 671                 slap_syntax_transform_func      *pretty;
 672
 673                 attr = attr_alloc( NULL );
 674                 if ( attr == NULL ) {
 675                         return LDAP_OTHER;
 676                 }
 677                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 678                                 != LDAP_SUCCESS )
 679                 {
 680                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 681                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 682                         {
 683                                 Debug( LDAP_DEBUG_ANY,
 684                                         "%s ldap_build_entry: "
 685                                         "slap_bv2undef_ad(%s): %s\n",
 686                                         op->o_log_prefix, a.bv_val, text );
 687
 688                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 689                                 attr_free( attr );
 690                                 continue;
 691                         }
 692                 }
 693
 694                 /* no subschemaSubentry */
 695                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 696                         || attr->a_desc == slap_schema.si_ad_entryDN )
 697                 {
 698
 699                         /*
 700                          * We eat target's subschemaSubentry because
 701                          * a search for this value is likely not
 702                          * to resolve to the appropriate backend;
 703                          * later, the local subschemaSubentry is
 704                          * added.
 705                          *
 706                          * We also eat entryDN because the frontend
 707                          * will reattach it without checking if already
 708                          * present...
 709                          */
 710                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 711                         attr_free( attr );
 712                         continue;
 713                 }
 714
 715                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 716                                 || attr->a_vals == NULL )
 717                 {
 718                         /*
 719                          * Note: attr->a_vals can be null when using
 720                          * values result filter
 721                          */
 722                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 723                 }
 724
 725                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 726                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 727
 728                 if ( !validate && !pretty ) {
 729                         attr->a_nvals = NULL;
 730                         attr_free( attr );
 731                         goto next_attr;
 732                 }
 733
 734                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 735                 last = i;
 736
 737                 /*
 738                  * check that each value is valid per syntax
 739                  * and pretty if appropriate
 740                  */
 741                 for ( i = 0; i<last; i++ ) {
 742                         struct berval   pval;
 743                         int             rc;
 744
 745                         if ( pretty ) {
 746                                 rc = pretty( attr->a_desc->ad_type->sat_syntax,
 747                                         &attr->a_vals[i], &pval, NULL );
 748
 749                         } else {
 750                                 rc = validate( attr->a_desc->ad_type->sat_syntax,
 751                                         &attr->a_vals[i] );
 752                         }
 753
 754                         if ( rc != LDAP_SUCCESS ) {
 755                                 ObjectClass *oc;
 756
 757                                 /* check if, by chance, it's an undefined objectClass */
 758                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 759                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 760                                 {
 761                                         ber_dupbv( &pval, &oc->soc_cname );
 762
 763                                 } else {
 764                                         LBER_FREE( attr->a_vals[i].bv_val );
 765                                         if ( --last == i ) {
 766                                                 BER_BVZERO( &attr->a_vals[i] );
 767                                                 break;
 768                                         }
 769                                         attr->a_vals[i] = attr->a_vals[last];
 770                                         BER_BVZERO( &attr->a_vals[last] );
 771                                         i--;
 772                                 }
 773
 774                         } else if ( pretty ) {
 775                                 LBER_FREE( attr->a_vals[i].bv_val );
 776                                 attr->a_vals[i] = pval;
 777                         }
 778                 }
 779                 attr->a_numvals = last = i;
 780                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 781                         attr->a_nvals = NULL;
 782                         attr_free( attr );
 783                         goto next_attr;
 784                 }
 785
 786                 if ( last && attr->a_desc->ad_type->sat_equality &&
 787                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 788                 {
 789                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 790                         for ( i = 0; i < last; i++ ) {
 791                                 int             rc;
 792
 793                                 rc = attr->a_desc->ad_type->sat_equality->smr_normalize(
 794                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 795                                         attr->a_desc->ad_type->sat_syntax,
 796                                         attr->a_desc->ad_type->sat_equality,
 797                                         &attr->a_vals[i], &attr->a_nvals[i],
 798                                         NULL );
 799
 800                                 if ( rc != LDAP_SUCCESS ) {
 801                                         LBER_FREE( 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                         BER_BVZERO( &attr->a_nvals[i] );
 812                         if ( last == 0 ) {
 813                                 attr_free( attr );
 814                                 goto next_attr;
 815                         }
 816
 817                 } else {
 818                         attr->a_nvals = attr->a_vals;
 819                 }
 820
 821                 attr->a_numvals = last;
 822
 823                 /* Handle sorted vals, strip dups but keep the attr */
 824                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 825                         while ( attr->a_numvals > 1 ) {
 826                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 827                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 828                                         break;
 829
 830                                 /* Strip duplicate values */
 831                                 if ( attr->a_nvals != attr->a_vals )
 832                                         LBER_FREE( attr->a_nvals[i].bv_val );
 833                                 LBER_FREE( attr->a_vals[i].bv_val );
 834                                 attr->a_numvals--;
 835                                 if ( i < attr->a_numvals ) {
 836                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 837                                         if ( attr->a_nvals != attr->a_vals )
 838                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 839                                 }
 840                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 841                                 if ( attr->a_nvals != attr->a_vals )
 842                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 843                         }
 844                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 845                 }
 846
 847                 *attrp = attr;
 848                 attrp = &attr->a_next;
 849
 850 next_attr:;
 851         }
 852
 853         return LDAP_SUCCESS;
 854 }
 855
 856 /* return 0 IFF we can retrieve the entry with ndn
 857  */
 858 int
 859 ldap_back_entry_get(
 860                 Operation               *op,
 861                 struct berval           *ndn,
 862                 ObjectClass             *oc,
 863                 AttributeDescription    *at,
 864                 int                     rw,
 865                 Entry                   **ent )
 866 {
 867         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 868
 869         ldapconn_t      *lc = NULL;
 870         int             rc,
 871                         do_not_cache;
 872         ber_tag_t       tag;
 873         struct berval   bdn;
 874         LDAPMessage     *result = NULL,
 875                         *e = NULL;
 876         char            *attr[3], **attrp = NULL;
 877         char            *filter = NULL;
 878         SlapReply       rs;
 879         int             do_retry = 1;
 880         LDAPControl     **ctrls = NULL;
 881
 882         *ent = NULL;
 883
 884         /* Tell getconn this is a privileged op */
 885         do_not_cache = op->o_do_not_cache;
 886         tag = op->o_tag;
 887         /* do not cache */
 888         op->o_do_not_cache = 1;
 889         /* ldap_back_entry_get() is an entry lookup, so it does not need
 890          * to know what the entry is being looked up for */
 891         op->o_tag = LDAP_REQ_SEARCH;
 892         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 893         op->o_do_not_cache = do_not_cache;
 894         op->o_tag = tag;
 895         if ( !rc ) {
 896                 return rs.sr_err;
 897         }
 898
 899         if ( at ) {
 900                 attrp = attr;
 901                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 902                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 903                         attr[1] = at->ad_cname.bv_val;
 904                         attr[2] = NULL;
 905
 906                 } else {
 907                         attr[0] = at->ad_cname.bv_val;
 908                         attr[1] = NULL;
 909                 }
 910         }
 911
 912         if ( oc ) {
 913                 char    *ptr;
 914
 915                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 916                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 917                 ptr = lutil_strcopy( filter, "(objectClass=" );
 918                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 919                 *ptr++ = ')';
 920                 *ptr++ = '\0';
 921         }
 922
 923 retry:
 924         ctrls = op->o_ctrls;
 925         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 926         if ( rc != LDAP_SUCCESS ) {
 927                 goto cleanup;
 928         }
 929
 930         /* TODO: timeout? */
 931         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 932                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 933                                 NULL, LDAP_NO_LIMIT, 0, &result );
 934         if ( rc != LDAP_SUCCESS ) {
 935                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 936                         do_retry = 0;
 937                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 938                                 /* if the identity changed, there might be need to re-authz */
 939                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 940                                 goto retry;
 941                         }
 942                 }
 943                 goto cleanup;
 944         }
 945
 946         e = ldap_first_entry( lc->lc_ld, result );
 947         if ( e == NULL ) {
 948                 /* the entry exists, but it doesn't match the filter? */
 949                 goto cleanup;
 950         }
 951
 952         *ent = entry_alloc();
 953         if ( *ent == NULL ) {
 954                 rc = LDAP_NO_MEMORY;
 955                 goto cleanup;
 956         }
 957
 958         rc = ldap_build_entry( op, e, *ent, &bdn );
 959
 960         if ( rc != LDAP_SUCCESS ) {
 961                 entry_free( *ent );
 962                 *ent = NULL;
 963         }
 964
 965 cleanup:
 966         (void)ldap_back_controls_free( op, &rs, &ctrls );
 967
 968         if ( result ) {
 969                 ldap_msgfree( result );
 970         }
 971
 972         if ( filter ) {
 973                 op->o_tmpfree( filter, op->o_tmpmemctx );
 974         }
 975
 976         if ( lc != NULL ) {
 977                 ldap_back_release_conn( li, lc );
 978         }
 979
 980         return rc;
 981 }
 982