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