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 #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         void            *matchctx = NULL;
 173
 174         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
 175                 return rs->sr_err;
 176         }
 177
 178         /*
 179          * FIXME: in case of values return filter, we might want
 180          * to map attrs and maybe rewrite value
 181          */
 182
 183         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
 184                 tv.tv_sec = op->ors_tlimit;
 185                 tv.tv_usec = 0;
 186                 stoptime = op->o_time + op->ors_tlimit;
 187
 188         } else {
 189                 LDAP_BACK_TV_SET( &tv );
 190         }
 191
 192         if ( op->ors_attrs ) {
 193                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ )
 194                         /* just count attrs */ ;
 195
 196                 attrs = op->o_tmpalloc( ( i + 1 )*sizeof( char * ),
 197                         op->o_tmpmemctx );
 198                 if ( attrs == NULL ) {
 199                         rs->sr_err = LDAP_NO_MEMORY;
 200                         rc = -1;
 201                         goto finish;
 202                 }
 203
 204                 for ( i = 0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++ ) {
 205                         attrs[ i ] = op->ors_attrs[i].an_name.bv_val;
 206                 }
 207                 attrs[ i ] = NULL;
 208         }
 209
 210         ctrls = op->o_ctrls;
 211         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 212         if ( rc != LDAP_SUCCESS ) {
 213                 goto finish;
 214         }
 215
 216         /* deal with <draft-zeilenga-ldap-t-f> filters */
 217         filter = op->ors_filterstr;
 218 retry:
 219         rs->sr_err = ldap_pvt_search( lc->lc_ld, op->o_req_dn.bv_val,
 220                         op->ors_scope, filter.bv_val,
 221                         attrs, op->ors_attrsonly, ctrls, NULL,
 222                         tv.tv_sec ? &tv : NULL,
 223                         op->ors_slimit, op->ors_deref, &msgid );
 224
 225         if ( rs->sr_err != LDAP_SUCCESS ) {
 226                 switch ( rs->sr_err ) {
 227                 case LDAP_SERVER_DOWN:
 228                         if ( do_retry ) {
 229                                 do_retry = 0;
 230                                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_DONTSEND ) ) {
 231                                         goto retry;
 232                                 }
 233                         }
 234
 235                         if ( lc == NULL ) {
 236                                 /* reset by ldap_back_retry ... */
 237                                 rs->sr_err = slap_map_api2result( rs );
 238
 239                         } else {
 240                                 rc = ldap_back_op_result( lc, op, rs, msgid, 0, LDAP_BACK_DONTSEND );
 241                         }
 242
 243                         goto finish;
 244
 245                 case LDAP_FILTER_ERROR:
 246                         if (ldap_back_munge_filter( op, &filter, &freefilter ) > 0 ) {
 247                                 goto retry;
 248                         }
 249
 250                         /* invalid filters return success with no data */
 251                         rs->sr_err = LDAP_SUCCESS;
 252                         rs->sr_text = NULL;
 253                         goto finish;
 254
 255                 default:
 256                         rs->sr_err = slap_map_api2result( rs );
 257                         rs->sr_text = NULL;
 258                         goto finish;
 259                 }
 260         }
 261
 262         /* if needed, initialize timeout */
 263         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 264                 if ( tv.tv_sec == 0 || tv.tv_sec > li->li_timeout[ SLAP_OP_SEARCH ] ) {
 265                         tv.tv_sec = li->li_timeout[ SLAP_OP_SEARCH ];
 266                         tv.tv_usec = 0;
 267                 }
 268         }
 269
 270         /* We pull apart the ber result, stuff it into a slapd entry, and
 271          * let send_search_entry stuff it back into ber format. Slow & ugly,
 272          * but this is necessary for version matching, and for ACL processing.
 273          */
 274
 275         for ( rc = -2; rc != -1; rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ONE, &tv, &res ) )
 276         {
 277                 /* check for abandon */
 278                 if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( lc ) ) {
 279                         if ( rc > 0 ) {
 280                                 ldap_msgfree( res );
 281                         }
 282                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 283                         rc = SLAPD_ABANDON;
 284                         goto finish;
 285                 }
 286
 287                 if ( rc == 0 || rc == -2 ) {
 288                         ldap_pvt_thread_yield();
 289
 290                         /* check timeout */
 291                         if ( li->li_timeout[ SLAP_OP_SEARCH ] ) {
 292                                 if ( rc == 0 ) {
 293                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 294                                         rs->sr_text = "Operation timed out";
 295                                         rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
 296                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 297                                         goto finish;
 298                                 }
 299
 300                         } else {
 301                                 LDAP_BACK_TV_SET( &tv );
 302                         }
 303
 304                         /* check time limit */
 305                         if ( op->ors_tlimit != SLAP_NO_LIMIT
 306                                         && slap_get_time() > stoptime )
 307                         {
 308                                 (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 309                                 rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 310                                 goto finish;
 311                         }
 312                         continue;
 313
 314                 } else {
 315                         /* only touch when activity actually took place... */
 316                         if ( li->li_idle_timeout && lc ) {
 317                                 lc->lc_time = op->o_time;
 318                         }
 319
 320                         /* don't retry any more */
 321                         dont_retry = 1;
 322                 }
 323
 324
 325                 if ( rc == LDAP_RES_SEARCH_ENTRY ) {
 326                         Entry           ent = { 0 };
 327                         struct berval   bdn = BER_BVNULL;
 328
 329                         do_retry = 0;
 330
 331                         e = ldap_first_entry( lc->lc_ld, res );
 332                         rc = ldap_build_entry( op, e, &ent, &bdn );
 333                         if ( rc == LDAP_SUCCESS ) {
 334                                 ldap_get_entry_controls( lc->lc_ld, res, &rs->sr_ctrls );
 335                                 rs->sr_entry = &ent;
 336                                 rs->sr_attrs = op->ors_attrs;
 337                                 rs->sr_operational_attrs = NULL;
 338                                 rs->sr_flags = 0;
 339                                 rs->sr_err = LDAP_SUCCESS;
 340                                 rc = rs->sr_err = send_search_entry( op, rs );
 341                                 if ( rs->sr_ctrls ) {
 342                                         ldap_controls_free( rs->sr_ctrls );
 343                                         rs->sr_ctrls = NULL;
 344                                 }
 345                                 rs->sr_entry = NULL;
 346                                 if ( !BER_BVISNULL( &ent.e_name ) ) {
 347                                         assert( ent.e_name.bv_val != bdn.bv_val );
 348                                         op->o_tmpfree( ent.e_name.bv_val, op->o_tmpmemctx );
 349                                         BER_BVZERO( &ent.e_name );
 350                                 }
 351                                 if ( !BER_BVISNULL( &ent.e_nname ) ) {
 352                                         op->o_tmpfree( ent.e_nname.bv_val, op->o_tmpmemctx );
 353                                         BER_BVZERO( &ent.e_nname );
 354                                 }
 355                                 entry_clean( &ent );
 356                         }
 357                         ldap_msgfree( res );
 358                         switch ( rc ) {
 359                         case LDAP_SUCCESS:
 360                         case LDAP_INSUFFICIENT_ACCESS:
 361                                 break;
 362
 363                         default:
 364                                 if ( rc == LDAP_UNAVAILABLE ) {
 365                                         rc = rs->sr_err = LDAP_OTHER;
 366                                 } else {
 367                                         (void)ldap_back_cancel( lc, op, rs, msgid, LDAP_BACK_DONTSEND );
 368                                 }
 369                                 goto finish;
 370                         }
 371
 372                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 373                         if ( LDAP_BACK_NOREFS( li ) ) {
 374                                 ldap_msgfree( res );
 375                                 continue;
 376                         }
 377
 378                         do_retry = 0;
 379                         rc = ldap_parse_reference( lc->lc_ld, res,
 380                                         &references, &rs->sr_ctrls, 1 );
 381
 382                         if ( rc != LDAP_SUCCESS ) {
 383                                 continue;
 384                         }
 385
 386                         /* FIXME: there MUST be at least one */
 387                         if ( references && references[ 0 ] && references[ 0 ][ 0 ] ) {
 388                                 int             cnt;
 389
 390                                 for ( cnt = 0; references[ cnt ]; cnt++ )
 391                                         /* NO OP */ ;
 392
 393                                 /* FIXME: there MUST be at least one */
 394                                 rs->sr_ref = op->o_tmpalloc( ( cnt + 1 ) * sizeof( struct berval ),
 395                                         op->o_tmpmemctx );
 396
 397                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
 398                                         ber_str2bv( references[ cnt ], 0, 0, &rs->sr_ref[ cnt ] );
 399                                 }
 400                                 BER_BVZERO( &rs->sr_ref[ cnt ] );
 401
 402                                 /* ignore return value by now */
 403                                 rs->sr_entry = NULL;
 404                                 ( void )send_search_reference( op, rs );
 405
 406                         } else {
 407                                 Debug( LDAP_DEBUG_ANY,
 408                                         "%s ldap_back_search: "
 409                                         "got SEARCH_REFERENCE "
 410                                         "with no referrals\n",
 411                                         op->o_log_prefix, 0, 0 );
 412                         }
 413
 414                         /* cleanup */
 415                         if ( references ) {
 416                                 ber_memvfree( (void **)references );
 417                                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 418                                 rs->sr_ref = NULL;
 419                                 references = NULL;
 420                         }
 421
 422                         if ( rs->sr_ctrls ) {
 423                                 ldap_controls_free( rs->sr_ctrls );
 424                                 rs->sr_ctrls = NULL;
 425                         }
 426
 427                 } else if ( rc == LDAP_RES_INTERMEDIATE ) {
 428                         /* FIXME: response controls
 429                          * are passed without checks */
 430                         rc = ldap_parse_intermediate( lc->lc_ld,
 431                                 res,
 432                                 (char **)&rs->sr_rspoid,
 433                                 &rs->sr_rspdata,
 434                                 &rs->sr_ctrls,
 435                                 0 );
 436                         if ( rc != LDAP_SUCCESS ) {
 437                                 continue;
 438                         }
 439
 440                         slap_send_ldap_intermediate( op, rs );
 441
 442                         if ( rs->sr_rspoid != NULL ) {
 443                                 ber_memfree( (char *)rs->sr_rspoid );
 444                                 rs->sr_rspoid = NULL;
 445                         }
 446
 447                         if ( rs->sr_rspdata != NULL ) {
 448                                 ber_bvfree( rs->sr_rspdata );
 449                                 rs->sr_rspdata = NULL;
 450                         }
 451
 452                         if ( rs->sr_ctrls != NULL ) {
 453                                 ldap_controls_free( rs->sr_ctrls );
 454                                 rs->sr_ctrls = NULL;
 455                         }
 456
 457                 } else {
 458                         char            *err = NULL;
 459
 460                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
 461                                         &match.bv_val, &err,
 462                                         &references, &rs->sr_ctrls, 1 );
 463                         if ( rc == LDAP_SUCCESS ) {
 464                                 if ( err ) {
 465                                         rs->sr_text = err;
 466                                         freetext = 1;
 467                                 }
 468                         } else {
 469                                 rs->sr_err = rc;
 470                         }
 471                         rs->sr_err = slap_map_api2result( rs );
 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                         ber_memfree( match.bv_val );
 550                         matchctx = op->o_tmpmemctx;
 551                         match.bv_val = pmatch.bv_val;
 552                 }
 553                 rs->sr_matched = match.bv_val;
 554         }
 555
 556         if ( rs->sr_v2ref ) {
 557                 rs->sr_err = LDAP_REFERRAL;
 558         }
 559
 560 finish:;
 561         if ( LDAP_BACK_QUARANTINE( li ) ) {
 562                 ldap_back_quarantine( op, rs );
 563         }
 564
 565         if ( freefilter && filter.bv_val != op->ors_filterstr.bv_val ) {
 566                 op->o_tmpfree( filter.bv_val, op->o_tmpmemctx );
 567         }
 568
 569 #if 0
 570         /* let send_ldap_result play cleanup handlers (ITS#4645) */
 571         if ( rc != SLAPD_ABANDON )
 572 #endif
 573         {
 574                 send_ldap_result( op, rs );
 575         }
 576
 577         (void)ldap_back_controls_free( op, rs, &ctrls );
 578
 579         if ( rs->sr_ctrls ) {
 580                 ldap_controls_free( rs->sr_ctrls );
 581                 rs->sr_ctrls = NULL;
 582         }
 583
 584         if ( match.bv_val ) {
 585                 ber_memfree_x( match.bv_val, matchctx );
 586         }
 587         rs->sr_matched = NULL;
 588
 589         if ( rs->sr_text ) {
 590                 if ( freetext ) {
 591                         ber_memfree( (char *)rs->sr_text );
 592                 }
 593                 rs->sr_text = NULL;
 594         }
 595
 596         if ( rs->sr_ref ) {
 597                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
 598                 rs->sr_ref = NULL;
 599         }
 600
 601         if ( references ) {
 602                 ber_memvfree( (void **)references );
 603         }
 604
 605         if ( attrs ) {
 606                 op->o_tmpfree( attrs, op->o_tmpmemctx );
 607         }
 608
 609         if ( lc != NULL ) {
 610                 ldap_back_release_conn( li, lc );
 611         }
 612
 613         return rs->sr_err;
 614 }
 615
 616 static int
 617 ldap_build_entry(
 618                 Operation       *op,
 619                 LDAPMessage     *e,
 620                 Entry           *ent,
 621                 struct berval   *bdn )
 622 {
 623         struct berval   a;
 624         BerElement      ber = *ldap_get_message_ber( e );
 625         Attribute       *attr, **attrp;
 626         const char      *text;
 627         int             last;
 628         char *lastb;
 629         ber_len_t len;
 630
 631         /* safe assumptions ... */
 632         assert( ent != NULL );
 633         BER_BVZERO( &ent->e_bv );
 634
 635         if ( ber_scanf( &ber, "{m", bdn ) == LBER_ERROR ) {
 636                 return LDAP_DECODING_ERROR;
 637         }
 638
 639         /*
 640          * Note: this may fail if the target host(s) schema differs
 641          * from the one known to the meta, and a DN with unknown
 642          * attributes is returned.
 643          *
 644          * FIXME: should we log anything, or delegate to dnNormalize?
 645          */
 646         /* Note: if the distinguished values or the naming attributes
 647          * change, should we massage them as well?
 648          */
 649         if ( dnPrettyNormal( NULL, bdn, &ent->e_name, &ent->e_nname,
 650                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 651         {
 652                 return LDAP_INVALID_DN_SYNTAX;
 653         }
 654
 655         ent->e_attrs = NULL;
 656         if ( ber_first_element( &ber, &len, &lastb ) != LBER_SEQUENCE ) {
 657                 return LDAP_SUCCESS;
 658         }
 659
 660         attrp = &ent->e_attrs;
 661         while ( ber_next_element( &ber, &len, lastb ) == LBER_SEQUENCE &&
 662                 ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 663                 int                             i;
 664                 slap_syntax_validate_func       *validate;
 665                 slap_syntax_transform_func      *pretty;
 666
 667                 attr = attr_alloc( NULL );
 668                 if ( attr == NULL ) {
 669                         return LDAP_OTHER;
 670                 }
 671                 if ( slap_bv2ad( &a, &attr->a_desc, &text )
 672                                 != LDAP_SUCCESS )
 673                 {
 674                         if ( slap_bv2undef_ad( &a, &attr->a_desc, &text,
 675                                 SLAP_AD_PROXIED ) != LDAP_SUCCESS )
 676                         {
 677                                 Debug( LDAP_DEBUG_ANY,
 678                                         "%s ldap_build_entry: "
 679                                         "slap_bv2undef_ad(%s): %s\n",
 680                                         op->o_log_prefix, a.bv_val, text );
 681
 682                                 ( void )ber_scanf( &ber, "x" /* [W] */ );
 683                                 attr_free( attr );
 684                                 continue;
 685                         }
 686                 }
 687
 688                 /* no subschemaSubentry */
 689                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
 690                         || attr->a_desc == slap_schema.si_ad_entryDN )
 691                 {
 692
 693                         /*
 694                          * We eat target's subschemaSubentry because
 695                          * a search for this value is likely not
 696                          * to resolve to the appropriate backend;
 697                          * later, the local subschemaSubentry is
 698                          * added.
 699                          *
 700                          * We also eat entryDN because the frontend
 701                          * will reattach it without checking if already
 702                          * present...
 703                          */
 704                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 705                         attr_free( attr );
 706                         continue;
 707                 }
 708
 709                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 710                                 || attr->a_vals == NULL )
 711                 {
 712                         /*
 713                          * Note: attr->a_vals can be null when using
 714                          * values result filter
 715                          */
 716                         attr->a_vals = (struct berval *)&slap_dummy_bv;
 717                 }
 718
 719                 validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
 720                 pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;
 721
 722                 if ( !validate && !pretty ) {
 723                         attr->a_nvals = NULL;
 724                         attr_free( attr );
 725                         goto next_attr;
 726                 }
 727
 728                 for ( i = 0; !BER_BVISNULL( &attr->a_vals[i] ); i++ ) ;
 729                 last = i;
 730
 731                 /*
 732                  * check that each value is valid per syntax
 733                  * and pretty if appropriate
 734                  */
 735                 for ( i = 0; i<last; i++ ) {
 736                         struct berval   pval;
 737                         int             rc;
 738
 739                         if ( pretty ) {
 740                                 rc = ordered_value_pretty( attr->a_desc,
 741                                         &attr->a_vals[i], &pval, NULL );
 742
 743                         } else {
 744                                 rc = ordered_value_validate( attr->a_desc,
 745                                         &attr->a_vals[i], 0 );
 746                         }
 747
 748                         if ( rc != LDAP_SUCCESS ) {
 749                                 ObjectClass *oc;
 750
 751                                 /* check if, by chance, it's an undefined objectClass */
 752                                 if ( attr->a_desc == slap_schema.si_ad_objectClass &&
 753                                                 ( oc = oc_bvfind_undef( &attr->a_vals[i] ) ) != NULL )
 754                                 {
 755                                         ber_dupbv( &pval, &oc->soc_cname );
 756                                         rc = LDAP_SUCCESS;
 757
 758                                 } else {
 759                                         ber_memfree( attr->a_vals[i].bv_val );
 760                                         if ( --last == i ) {
 761                                                 BER_BVZERO( &attr->a_vals[i] );
 762                                                 break;
 763                                         }
 764                                         attr->a_vals[i] = attr->a_vals[last];
 765                                         BER_BVZERO( &attr->a_vals[last] );
 766                                         i--;
 767                                 }
 768                         }
 769
 770                         if ( rc == LDAP_SUCCESS && pretty ) {
 771                                 ber_memfree( attr->a_vals[i].bv_val );
 772                                 attr->a_vals[i] = pval;
 773                         }
 774                 }
 775                 attr->a_numvals = last = i;
 776                 if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
 777                         attr->a_nvals = NULL;
 778                         attr_free( attr );
 779                         goto next_attr;
 780                 }
 781
 782                 if ( last && attr->a_desc->ad_type->sat_equality &&
 783                                 attr->a_desc->ad_type->sat_equality->smr_normalize )
 784                 {
 785                         attr->a_nvals = ch_malloc( ( last + 1 )*sizeof( struct berval ) );
 786                         for ( i = 0; i < last; i++ ) {
 787                                 int             rc;
 788
 789                                 rc = ordered_value_normalize(
 790                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 791                                         attr->a_desc,
 792                                         attr->a_desc->ad_type->sat_equality,
 793                                         &attr->a_vals[i], &attr->a_nvals[i],
 794                                         NULL );
 795
 796                                 if ( rc != LDAP_SUCCESS ) {
 797                                         ber_memfree( attr->a_vals[i].bv_val );
 798                                         if ( --last == i ) {
 799                                                 BER_BVZERO( &attr->a_vals[i] );
 800                                                 break;
 801                                         }
 802                                         attr->a_vals[i] = attr->a_vals[last];
 803                                         BER_BVZERO( &attr->a_vals[last] );
 804                                         i--;
 805                                 }
 806                         }
 807                         BER_BVZERO( &attr->a_nvals[i] );
 808                         if ( last == 0 ) {
 809                                 attr_free( attr );
 810                                 goto next_attr;
 811                         }
 812
 813                 } else {
 814                         attr->a_nvals = attr->a_vals;
 815                 }
 816
 817                 attr->a_numvals = last;
 818
 819                 /* Handle sorted vals, strip dups but keep the attr */
 820                 if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
 821                         while ( attr->a_numvals > 1 ) {
 822                                 int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
 823                                 if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
 824                                         break;
 825
 826                                 /* Strip duplicate values */
 827                                 if ( attr->a_nvals != attr->a_vals )
 828                                         ber_memfree( attr->a_nvals[i].bv_val );
 829                                 ber_memfree( attr->a_vals[i].bv_val );
 830                                 attr->a_numvals--;
 831
 832                                 assert( i >= 0 );
 833                                 if ( (unsigned)i < attr->a_numvals ) {
 834                                         attr->a_vals[i] = attr->a_vals[attr->a_numvals];
 835                                         if ( attr->a_nvals != attr->a_vals )
 836                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
 837                                 }
 838                                 BER_BVZERO(&attr->a_vals[attr->a_numvals]);
 839                                 if ( attr->a_nvals != attr->a_vals )
 840                                         BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
 841                         }
 842                         attr->a_flags |= SLAP_ATTR_SORTED_VALS;
 843                 }
 844
 845                 *attrp = attr;
 846                 attrp = &attr->a_next;
 847
 848 next_attr:;
 849         }
 850
 851         return LDAP_SUCCESS;
 852 }
 853
 854 /* return 0 IFF we can retrieve the entry with ndn
 855  */
 856 int
 857 ldap_back_entry_get(
 858                 Operation               *op,
 859                 struct berval           *ndn,
 860                 ObjectClass             *oc,
 861                 AttributeDescription    *at,
 862                 int                     rw,
 863                 Entry                   **ent )
 864 {
 865         ldapinfo_t      *li = (ldapinfo_t *) op->o_bd->be_private;
 866
 867         ldapconn_t      *lc = NULL;
 868         int             rc,
 869                         do_not_cache;
 870         ber_tag_t       tag;
 871         struct berval   bdn;
 872         LDAPMessage     *result = NULL,
 873                         *e = NULL;
 874         char            *attr[3], **attrp = NULL;
 875         char            *filter = NULL;
 876         SlapReply       rs;
 877         int             do_retry = 1;
 878         LDAPControl     **ctrls = NULL;
 879
 880         *ent = NULL;
 881
 882         /* Tell getconn this is a privileged op */
 883         do_not_cache = op->o_do_not_cache;
 884         tag = op->o_tag;
 885         /* do not cache */
 886         op->o_do_not_cache = 1;
 887         /* ldap_back_entry_get() is an entry lookup, so it does not need
 888          * to know what the entry is being looked up for */
 889         op->o_tag = LDAP_REQ_SEARCH;
 890         rc = ldap_back_dobind( &lc, op, &rs, LDAP_BACK_DONTSEND );
 891         op->o_do_not_cache = do_not_cache;
 892         op->o_tag = tag;
 893         if ( !rc ) {
 894                 return rs.sr_err;
 895         }
 896
 897         if ( at ) {
 898                 attrp = attr;
 899                 if ( oc && at != slap_schema.si_ad_objectClass ) {
 900                         attr[0] = slap_schema.si_ad_objectClass->ad_cname.bv_val;
 901                         attr[1] = at->ad_cname.bv_val;
 902                         attr[2] = NULL;
 903
 904                 } else {
 905                         attr[0] = at->ad_cname.bv_val;
 906                         attr[1] = NULL;
 907                 }
 908         }
 909
 910         if ( oc ) {
 911                 char    *ptr;
 912
 913                 filter = op->o_tmpalloc( STRLENOF( "(objectClass=" ")" )
 914                                 + oc->soc_cname.bv_len + 1, op->o_tmpmemctx );
 915                 ptr = lutil_strcopy( filter, "(objectClass=" );
 916                 ptr = lutil_strcopy( ptr, oc->soc_cname.bv_val );
 917                 *ptr++ = ')';
 918                 *ptr++ = '\0';
 919         }
 920
 921 retry:
 922         ctrls = op->o_ctrls;
 923         rc = ldap_back_controls_add( op, &rs, lc, &ctrls );
 924         if ( rc != LDAP_SUCCESS ) {
 925                 goto cleanup;
 926         }
 927
 928         /* TODO: timeout? */
 929         rc = ldap_pvt_search_s( lc->lc_ld, ndn->bv_val, LDAP_SCOPE_BASE, filter,
 930                                 attrp, LDAP_DEREF_NEVER, ctrls, NULL,
 931                                 NULL, LDAP_NO_LIMIT, 0, &result );
 932         if ( rc != LDAP_SUCCESS ) {
 933                 if ( rc == LDAP_SERVER_DOWN && do_retry ) {
 934                         do_retry = 0;
 935                         if ( ldap_back_retry( &lc, op, &rs, LDAP_BACK_DONTSEND ) ) {
 936                                 /* if the identity changed, there might be need to re-authz */
 937                                 (void)ldap_back_controls_free( op, &rs, &ctrls );
 938                                 goto retry;
 939                         }
 940                 }
 941                 goto cleanup;
 942         }
 943
 944         e = ldap_first_entry( lc->lc_ld, result );
 945         if ( e == NULL ) {
 946                 /* the entry exists, but it doesn't match the filter? */
 947                 goto cleanup;
 948         }
 949
 950         *ent = entry_alloc();
 951         if ( *ent == NULL ) {
 952                 rc = LDAP_NO_MEMORY;
 953                 goto cleanup;
 954         }
 955
 956         rc = ldap_build_entry( op, e, *ent, &bdn );
 957
 958         if ( rc != LDAP_SUCCESS ) {
 959                 entry_free( *ent );
 960                 *ent = NULL;
 961         }
 962
 963 cleanup:
 964         (void)ldap_back_controls_free( op, &rs, &ctrls );
 965
 966         if ( result ) {
 967                 ldap_msgfree( result );
 968         }
 969
 970         if ( filter ) {
 971                 op->o_tmpfree( filter, op->o_tmpmemctx );
 972         }
 973
 974         if ( lc != NULL ) {
 975                 ldap_back_release_conn( li, lc );
 976         }
 977
 978         return rc;
 979 }
 980