git.sur5r.net Git - openldap/blob - servers/slapd/controls.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15
  16 #include "portable.h"
  17
  18 #include <stdio.h>
  19
  20 #include <ac/string.h>
  21 #include <ac/socket.h>
  22
  23 #include "slap.h"
  24
  25 #include "../../libraries/liblber/lber-int.h"
  26
  27 static SLAP_CTRL_PARSE_FN parseAssert;
  28 static SLAP_CTRL_PARSE_FN parsePreRead;
  29 static SLAP_CTRL_PARSE_FN parsePostRead;
  30 static SLAP_CTRL_PARSE_FN parseProxyAuthz;
  31 #ifdef LDAP_DEVEL
  32 static SLAP_CTRL_PARSE_FN parseDontUseCopy;
  33 static SLAP_CTRL_PARSE_FN parseManageDIT;
  34 #endif
  35 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  36 static SLAP_CTRL_PARSE_FN parseNoOp;
  37 static SLAP_CTRL_PARSE_FN parsePagedResults;
  38 #ifdef LDAP_DEVEL
  39 static SLAP_CTRL_PARSE_FN parseSortedResults;
  40 #endif
  41 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  42 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  43 static SLAP_CTRL_PARSE_FN parseDomainScope;
  44 #ifdef SLAP_CONTROL_X_TREE_DELETE
  45 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  46 #endif
  47 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  48 static SLAP_CTRL_PARSE_FN parseSubentries;
  49
  50 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  51
  52 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  53 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  54
  55 struct slap_control_ids slap_cids;
  56
  57 struct slap_control {
  58         /* Control OID */
  59         char *sc_oid;
  60
  61         /* The controlID for this control */
  62         int sc_cid;
  63
  64         /* Operations supported by control */
  65         slap_mask_t sc_mask;
  66
  67         /* Extended operations supported by control */
  68         char **sc_extendedops;          /* input */
  69         BerVarray sc_extendedopsbv;     /* run-time use */
  70
  71         /* Control parsing callback */
  72         SLAP_CTRL_PARSE_FN *sc_parse;
  73
  74         LDAP_SLIST_ENTRY(slap_control) sc_next;
  75 };
  76
  77 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  78         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  79
  80 /*
  81  * all known request control OIDs should be added to this list
  82  */
  83 /*
  84  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  85  * addresses an undefined control; this allows to safely test for
  86  * well known controls even if they are not registered, e.g. if
  87  * they get moved to modules.  An example is sc_LDAPsync, which
  88  * is implemented in the syncprov overlay and thus, if configured
  89  * as dynamic module, may not be registered.  One side effect is that
  90  * slap_known_controls[0] == NULL, so it should always be used
  91  * starting from 1.
  92  * FIXME: should we define the "undefined control" oid?
  93  */
  94 char *slap_known_controls[SLAP_MAX_CIDS+1];
  95 static int num_known_controls = 1;
  96
  97 static char *proxy_authz_extops[] = {
  98         LDAP_EXOP_MODIFY_PASSWD,
  99         LDAP_EXOP_X_WHO_AM_I,
 100         NULL
 101 };
 102
 103 static char *manageDSAit_extops[] = {
 104         NULL
 105 };
 106
 107 static struct slap_control control_defs[] = {
 108         {  LDAP_CONTROL_ASSERT,
 109                 (int)offsetof(struct slap_control_ids, sc_assert),
 110                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME|
 111                         SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
 112                 NULL, NULL,
 113                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 114         { LDAP_CONTROL_PRE_READ,
 115                 (int)offsetof(struct slap_control_ids, sc_preRead),
 116                 SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 117                 NULL, NULL,
 118                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 119         { LDAP_CONTROL_POST_READ,
 120                 (int)offsetof(struct slap_control_ids, sc_postRead),
 121                 SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
 122                 NULL, NULL,
 123                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 124         { LDAP_CONTROL_VALUESRETURNFILTER,
 125                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 126                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
 127                 NULL, NULL,
 128                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 129         { LDAP_CONTROL_PAGEDRESULTS,
 130                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 131                 SLAP_CTRL_SEARCH,
 132                 NULL, NULL,
 133                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 134 #ifdef LDAP_DEVEL
 135         { LDAP_CONTROL_SORTREQUEST,
 136                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 137                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 138                 NULL, NULL,
 139                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 140 #endif
 141         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 142                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 143                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 144                 NULL, NULL,
 145                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 146         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 147                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 148                 SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
 149                 NULL, NULL,
 150                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 151 #ifdef SLAP_CONTROL_X_TREE_DELETE
 152         { LDAP_CONTROL_X_TREE_DELETE,
 153                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 154                 SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
 155                 NULL, NULL,
 156                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 157 #endif
 158         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 159                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 160                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
 161                 NULL, NULL,
 162                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 163         { LDAP_CONTROL_SUBENTRIES,
 164                 (int)offsetof(struct slap_control_ids, sc_subentries),
 165                 SLAP_CTRL_SEARCH,
 166                 NULL, NULL,
 167                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 168         { LDAP_CONTROL_NOOP,
 169                 (int)offsetof(struct slap_control_ids, sc_noOp),
 170                 SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
 171                 NULL, NULL,
 172                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 173 #ifdef LDAP_DEVEL
 174         { LDAP_CONTROL_DONTUSECOPY,
 175                 (int)offsetof(struct slap_control_ids, sc_dontUseCopy),
 176                 SLAP_CTRL_INTROGATE|SLAP_CTRL_HIDE,
 177                 NULL, NULL,
 178                 parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 179         { LDAP_CONTROL_MANAGEDIT,
 180                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 181                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
 182                 NULL, NULL,
 183                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 184 #endif
 185         { LDAP_CONTROL_MANAGEDSAIT,
 186                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 187                 SLAP_CTRL_ACCESS,
 188                 manageDSAit_extops, NULL,
 189                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 190         { LDAP_CONTROL_PROXY_AUTHZ,
 191                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 192                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
 193                 proxy_authz_extops, NULL,
 194                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 195         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 196 };
 197
 198 /*
 199  * Register a supported control.
 200  *
 201  * This can be called by an OpenLDAP plugin or, indirectly, by a
 202  * SLAPI plugin calling slapi_register_supported_control().
 203  */
 204 int
 205 register_supported_control(const char *controloid,
 206         slap_mask_t controlmask,
 207         char **controlexops,
 208         SLAP_CTRL_PARSE_FN *controlparsefn,
 209         int *controlcid)
 210 {
 211         struct slap_control *sc;
 212         int i;
 213
 214         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 215                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 216                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 217                 SLAP_MAX_CIDS, 0, 0 );
 218                 return LDAP_OTHER;
 219         }
 220
 221         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 222
 223         /* sanity check - should never happen */
 224         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 225                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 226                         Debug( LDAP_DEBUG_ANY,
 227                                 "Control %s already registered.\n",
 228                                 controloid, 0, 0 );
 229                         return LDAP_PARAM_ERROR;
 230                 }
 231         }
 232
 233         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 234         if ( sc == NULL ) return LDAP_NO_MEMORY;
 235
 236         sc->sc_oid = ch_strdup( controloid );
 237         sc->sc_mask = controlmask;
 238         if ( controlexops != NULL ) {
 239                 int i;
 240
 241                 for ( i = 0; controlexops[ i ]; i++ );
 242
 243                 sc->sc_extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
 244                 if ( sc->sc_extendedopsbv == NULL ) {
 245                         ch_free( sc );
 246                         return LDAP_NO_MEMORY;
 247                 }
 248
 249                 for ( i = 0; controlexops[ i ]; i++ ) {
 250                         ber_str2bv( controlexops[ i ], 0, 1, &sc->sc_extendedopsbv[ i ] );
 251                 }
 252
 253         } else {
 254                 sc->sc_extendedopsbv = NULL;
 255         }
 256         sc->sc_extendedops = NULL;
 257         sc->sc_parse = controlparsefn;
 258
 259         if ( controlcid ) *controlcid = num_known_controls;
 260         sc->sc_cid = num_known_controls;
 261
 262         /* Update slap_known_controls, too. */
 263         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 264         slap_known_controls[num_known_controls++] = NULL;
 265
 266         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 267         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 268         return LDAP_SUCCESS;
 269 }
 270
 271 /*
 272  * One-time initialization of internal controls.
 273  */
 274 int
 275 slap_controls_init( void )
 276 {
 277         int i, rc;
 278
 279         rc = LDAP_SUCCESS;
 280
 281         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 282                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 283                 rc = register_supported_control( control_defs[i].sc_oid,
 284                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 285                         control_defs[i].sc_parse, cid );
 286                 if ( rc != LDAP_SUCCESS ) break;
 287         }
 288
 289         return rc;
 290 }
 291
 292 /*
 293  * Free memory associated with list of supported controls.
 294  */
 295 void
 296 controls_destroy( void )
 297 {
 298         struct slap_control *sc;
 299
 300         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 301                 sc = LDAP_SLIST_FIRST(&controls_list);
 302                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 303
 304                 ch_free( sc->sc_oid );
 305                 if ( sc->sc_extendedopsbv != NULL ) {
 306                         ber_bvarray_free( sc->sc_extendedopsbv );
 307                 }
 308                 ch_free( sc );
 309         }
 310 }
 311
 312 /*
 313  * Format the supportedControl attribute of the root DSE,
 314  * detailing which controls are supported by the directory
 315  * server.
 316  */
 317 int
 318 controls_root_dse_info( Entry *e )
 319 {
 320         AttributeDescription *ad_supportedControl
 321                 = slap_schema.si_ad_supportedControl;
 322         struct berval vals[2];
 323         struct slap_control *sc;
 324
 325         vals[1].bv_val = NULL;
 326         vals[1].bv_len = 0;
 327
 328         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 329                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 330
 331                 vals[0].bv_val = sc->sc_oid;
 332                 vals[0].bv_len = strlen( sc->sc_oid );
 333
 334                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 335                         return -1;
 336                 }
 337         }
 338
 339         return 0;
 340 }
 341
 342 /*
 343  * Return a list of OIDs and operation masks for supported
 344  * controls. Used by SLAPI.
 345  */
 346 int
 347 get_supported_controls(char ***ctrloidsp,
 348         slap_mask_t **ctrlmasks)
 349 {
 350         int n;
 351         char **oids;
 352         slap_mask_t *masks;
 353         struct slap_control *sc;
 354
 355         n = 0;
 356
 357         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 358                 n++;
 359         }
 360
 361         if ( n == 0 ) {
 362                 *ctrloidsp = NULL;
 363                 *ctrlmasks = NULL;
 364                 return LDAP_SUCCESS;
 365         }
 366
 367         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 368         if ( oids == NULL ) {
 369                 return LDAP_NO_MEMORY;
 370         }
 371         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 372         if  ( masks == NULL ) {
 373                 ch_free( oids );
 374                 return LDAP_NO_MEMORY;
 375         }
 376
 377         n = 0;
 378
 379         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 380                 oids[n] = ch_strdup( sc->sc_oid );
 381                 masks[n] = sc->sc_mask;
 382                 n++;
 383         }
 384         oids[n] = NULL;
 385         masks[n] = 0;
 386
 387         *ctrloidsp = oids;
 388         *ctrlmasks = masks;
 389
 390         return LDAP_SUCCESS;
 391 }
 392
 393 /*
 394  * Find a control given its OID.
 395  */
 396 static struct slap_control *
 397 find_ctrl( const char *oid )
 398 {
 399         struct slap_control *sc;
 400
 401         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 402                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 403                         return sc;
 404                 }
 405         }
 406
 407         return NULL;
 408 }
 409
 410 int
 411 slap_find_control_id(
 412         const char *oid,
 413         int *cid )
 414 {
 415         struct slap_control *ctrl = find_ctrl( oid );
 416         if ( ctrl ) {
 417                 if ( cid ) *cid = ctrl->sc_cid;
 418                 return LDAP_SUCCESS;
 419         }
 420         return LDAP_CONTROL_NOT_FOUND;
 421 }
 422
 423 int
 424 slap_global_control( Operation *op, const char *oid, int *cid )
 425 {
 426         struct slap_control *ctrl = find_ctrl( oid );
 427
 428         if ( ctrl == NULL ) {
 429                 /* should not be reachable */
 430                 Debug( LDAP_DEBUG_ANY,
 431                         "slap_global_control: unrecognized control: %s\n",
 432                         oid, 0, 0 );
 433                 return LDAP_CONTROL_NOT_FOUND;
 434         }
 435
 436         if ( cid ) *cid = ctrl->sc_cid;
 437
 438         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 439                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 440                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 441         {
 442                 return LDAP_COMPARE_TRUE;
 443         }
 444
 445         Debug( LDAP_DEBUG_TRACE,
 446                 "slap_global_control: unavailable control: %s\n",
 447                 oid, 0, 0 );
 448
 449         return LDAP_COMPARE_FALSE;
 450 }
 451
 452 void slap_free_ctrls(
 453         Operation *op,
 454         LDAPControl **ctrls )
 455 {
 456         int i;
 457
 458         for (i=0; ctrls[i]; i++) {
 459                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 460         }
 461         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 462 }
 463
 464 int slap_parse_ctrl(
 465         Operation *op,
 466         SlapReply *rs,
 467         LDAPControl *control,
 468         const char **text )
 469 {
 470         struct slap_control *sc;
 471
 472         sc = find_ctrl( control->ldctl_oid );
 473         if( sc != NULL ) {
 474                 /* recognized control */
 475                 slap_mask_t tagmask;
 476                 switch( op->o_tag ) {
 477                 case LDAP_REQ_ADD:
 478                         tagmask = SLAP_CTRL_ADD;
 479                         break;
 480                 case LDAP_REQ_BIND:
 481                         tagmask = SLAP_CTRL_BIND;
 482                         break;
 483                 case LDAP_REQ_COMPARE:
 484                         tagmask = SLAP_CTRL_COMPARE;
 485                         break;
 486                 case LDAP_REQ_DELETE:
 487                         tagmask = SLAP_CTRL_DELETE;
 488                         break;
 489                 case LDAP_REQ_MODIFY:
 490                         tagmask = SLAP_CTRL_MODIFY;
 491                         break;
 492                 case LDAP_REQ_RENAME:
 493                         tagmask = SLAP_CTRL_RENAME;
 494                         break;
 495                 case LDAP_REQ_SEARCH:
 496                         tagmask = SLAP_CTRL_SEARCH;
 497                         break;
 498                 case LDAP_REQ_UNBIND:
 499                         tagmask = SLAP_CTRL_UNBIND;
 500                         break;
 501                 case LDAP_REQ_ABANDON:
 502                         tagmask = SLAP_CTRL_ABANDON;
 503                         break;
 504                 case LDAP_REQ_EXTENDED:
 505                         tagmask=~0L;
 506                         assert( op->ore_reqoid.bv_val != NULL );
 507                         if( sc->sc_extendedopsbv != NULL ) {
 508                                 int i;
 509                                 for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
 510                                         if( bvmatch( &op->ore_reqoid,
 511                                                 &sc->sc_extendedopsbv[i] ) )
 512                                         {
 513                                                 tagmask=0L;
 514                                                 break;
 515                                         }
 516                                 }
 517                         }
 518                         break;
 519                 default:
 520                         *text = "controls internal error";
 521                         return LDAP_OTHER;
 522                 }
 523
 524                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 525                         /* available extension */
 526                         int     rc;
 527
 528                         if( !sc->sc_parse ) {
 529                                 *text = "not yet implemented";
 530                                 return LDAP_OTHER;
 531                         }
 532
 533                         rc = sc->sc_parse( op, rs, control );
 534                         if ( rc ) {
 535                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 536                                 return rc;
 537                         }
 538
 539                 } else if( control->ldctl_iscritical ) {
 540                         /* unavailable CRITICAL control */
 541                         *text = "critical extension is unavailable";
 542                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 543                 }
 544         } else if( control->ldctl_iscritical ) {
 545                 /* unrecognized CRITICAL control */
 546                 *text = "critical extension is not recognized";
 547                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 548         }
 549
 550         return LDAP_SUCCESS;
 551 }
 552
 553 int get_ctrls(
 554         Operation *op,
 555         SlapReply *rs,
 556         int sendres )
 557 {
 558         int nctrls = 0;
 559         ber_tag_t tag;
 560         ber_len_t len;
 561         char *opaque;
 562         BerElement *ber = op->o_ber;
 563         struct berval bv;
 564
 565         len = ber_pvt_ber_remaining(ber);
 566
 567         if( len == 0) {
 568                 /* no controls */
 569                 rs->sr_err = LDAP_SUCCESS;
 570                 return rs->sr_err;
 571         }
 572
 573         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 574                 if( tag == LBER_ERROR ) {
 575                         rs->sr_err = SLAPD_DISCONNECT;
 576                         rs->sr_text = "unexpected data in PDU";
 577                 }
 578
 579                 goto return_results;
 580         }
 581
 582         Debug( LDAP_DEBUG_TRACE,
 583                 "=> get_ctrls\n", 0, 0, 0 );
 584
 585         if( op->o_protocol < LDAP_VERSION3 ) {
 586                 rs->sr_err = SLAPD_DISCONNECT;
 587                 rs->sr_text = "controls require LDAPv3";
 588                 goto return_results;
 589         }
 590
 591         /* one for first control, one for termination */
 592         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 593
 594 #if 0
 595         if( op->ctrls == NULL ) {
 596                 rs->sr_err = LDAP_NO_MEMORY;
 597                 rs->sr_text = "no memory";
 598                 goto return_results;
 599         }
 600 #endif
 601
 602         op->o_ctrls[nctrls] = NULL;
 603
 604         /* step through each element */
 605         for( tag = ber_first_element( ber, &len, &opaque );
 606                 tag != LBER_ERROR;
 607                 tag = ber_next_element( ber, &len, opaque ) )
 608         {
 609                 LDAPControl *c;
 610                 LDAPControl **tctrls;
 611
 612                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 613                 memset(c, 0, sizeof(LDAPControl));
 614
 615                 /* allocate pointer space for current controls (nctrls)
 616                  * + this control + extra NULL
 617                  */
 618                 tctrls = op->o_tmprealloc( op->o_ctrls,
 619                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 620
 621 #if 0
 622                 if( tctrls == NULL ) {
 623                         ch_free( c );
 624                         ldap_controls_free(op->o_ctrls);
 625                         op->o_ctrls = NULL;
 626
 627                         rs->sr_err = LDAP_NO_MEMORY;
 628                         rs->sr_text = "no memory";
 629                         goto return_results;
 630                 }
 631 #endif
 632                 op->o_ctrls = tctrls;
 633
 634                 op->o_ctrls[nctrls++] = c;
 635                 op->o_ctrls[nctrls] = NULL;
 636
 637                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 638                 c->ldctl_oid = bv.bv_val;
 639
 640                 if( tag == LBER_ERROR ) {
 641                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 642                                 0, 0, 0 );
 643
 644                         slap_free_ctrls( op, op->o_ctrls );
 645                         op->o_ctrls = NULL;
 646                         rs->sr_err = SLAPD_DISCONNECT;
 647                         rs->sr_text = "decoding controls error";
 648                         goto return_results;
 649
 650                 } else if( c->ldctl_oid == NULL ) {
 651                         Debug( LDAP_DEBUG_TRACE,
 652                                 "get_ctrls: conn %lu got emtpy OID.\n",
 653                                 op->o_connid, 0, 0 );
 654
 655                         slap_free_ctrls( op, op->o_ctrls );
 656                         op->o_ctrls = NULL;
 657                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 658                         rs->sr_text = "OID field is empty";
 659                         goto return_results;
 660                 }
 661
 662                 tag = ber_peek_tag( ber, &len );
 663
 664                 if( tag == LBER_BOOLEAN ) {
 665                         ber_int_t crit;
 666                         tag = ber_scanf( ber, "b", &crit );
 667
 668                         if( tag == LBER_ERROR ) {
 669                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 670                                         0, 0, 0 );
 671                                 slap_free_ctrls( op, op->o_ctrls );
 672                                 op->o_ctrls = NULL;
 673                                 rs->sr_err = SLAPD_DISCONNECT;
 674                                 rs->sr_text = "decoding controls error";
 675                                 goto return_results;
 676                         }
 677
 678                         c->ldctl_iscritical = (crit != 0);
 679                         tag = ber_peek_tag( ber, &len );
 680                 }
 681
 682                 if( tag == LBER_OCTETSTRING ) {
 683                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 684
 685                         if( tag == LBER_ERROR ) {
 686                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 687                                         "%s (%scritical): get value failed.\n",
 688                                         op->o_connid, c->ldctl_oid,
 689                                         c->ldctl_iscritical ? "" : "non" );
 690                                 slap_free_ctrls( op, op->o_ctrls );
 691                                 op->o_ctrls = NULL;
 692                                 rs->sr_err = SLAPD_DISCONNECT;
 693                                 rs->sr_text = "decoding controls error";
 694                                 goto return_results;
 695                         }
 696                 }
 697
 698                 Debug( LDAP_DEBUG_TRACE,
 699                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 700                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 701
 702                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 703                 if ( rs->sr_err != LDAP_SUCCESS ) {
 704                         goto return_results;
 705                 }
 706         }
 707
 708 return_results:
 709         Debug( LDAP_DEBUG_TRACE,
 710                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 711                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 712
 713         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 714                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 715                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 716                         send_ldap_disconnect( op, rs );
 717                         rs->sr_err = SLAPD_DISCONNECT;
 718                 } else {
 719                         send_ldap_result( op, rs );
 720                 }
 721         }
 722
 723         return rs->sr_err;
 724 }
 725
 726 int
 727 slap_remove_control(
 728         Operation       *op,
 729         SlapReply       *rs,
 730         int             ctrl,
 731         BI_chk_controls fnc )
 732 {
 733         int             i, j;
 734
 735         switch ( op->o_ctrlflag[ ctrl ] ) {
 736         case SLAP_CONTROL_NONCRITICAL:
 737                 for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
 738                         if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
 739                                 slap_known_controls[ ctrl - 1 ] ) == 0 )
 740                         {
 741                                 j = i;
 742                         }
 743                 }
 744
 745                 if ( j == -1 ) {
 746                         rs->sr_err = LDAP_OTHER;
 747                         break;
 748                 }
 749
 750                 if ( fnc ) {
 751                         (void)fnc( op, rs );
 752                 }
 753
 754                 op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
 755
 756                 if ( i > 1 ) {
 757                         AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
 758                                 ( i - j ) * sizeof( LDAPControl * ) );
 759
 760                 } else {
 761                         op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
 762                         op->o_ctrls = NULL;
 763                 }
 764
 765                 op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
 766
 767                 Debug( LDAP_DEBUG_ANY, "%s: "
 768                         "non-critical control \"%s\" not supported; stripped.\n",
 769                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 770                 /* fall thru */
 771
 772         case SLAP_CONTROL_IGNORED:
 773         case SLAP_CONTROL_NONE:
 774                 rs->sr_err = SLAP_CB_CONTINUE;
 775                 break;
 776
 777         case SLAP_CONTROL_CRITICAL:
 778                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 779                 if ( fnc ) {
 780                         (void)fnc( op, rs );
 781                 }
 782                 Debug( LDAP_DEBUG_ANY, "%s: "
 783                         "critical control \"%s\" not supported.\n",
 784                         op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
 785                 break;
 786
 787         default:
 788                 /* handle all cases! */
 789                 assert( 0 );
 790         }
 791
 792         return rs->sr_err;
 793 }
 794
 795 #ifdef LDAP_DEVEL
 796 static int parseDontUseCopy (
 797         Operation *op,
 798         SlapReply *rs,
 799         LDAPControl *ctrl )
 800 {
 801         if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
 802                 rs->sr_text = "dontUseCopy control specified multiple times";
 803                 return LDAP_PROTOCOL_ERROR;
 804         }
 805
 806         if ( ctrl->ldctl_value.bv_len ) {
 807                 rs->sr_text = "dontUseCopy control value not empty";
 808                 return LDAP_PROTOCOL_ERROR;
 809         }
 810
 811         if ( ctrl->ldctl_iscritical != SLAP_CONTROL_CRITICAL ) {
 812                 rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
 813                 return LDAP_PROTOCOL_ERROR;
 814         }
 815
 816         op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
 817         return LDAP_SUCCESS;
 818 }
 819
 820 static int parseManageDIT (
 821         Operation *op,
 822         SlapReply *rs,
 823         LDAPControl *ctrl )
 824 {
 825         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 826                 rs->sr_text = "manageDIT control specified multiple times";
 827                 return LDAP_PROTOCOL_ERROR;
 828         }
 829
 830         if ( ctrl->ldctl_value.bv_len ) {
 831                 rs->sr_text = "manageDIT control value not empty";
 832                 return LDAP_PROTOCOL_ERROR;
 833         }
 834
 835         op->o_managedit = ctrl->ldctl_iscritical
 836                 ? SLAP_CONTROL_CRITICAL
 837                 : SLAP_CONTROL_NONCRITICAL;
 838
 839         return LDAP_SUCCESS;
 840 }
 841 #endif
 842
 843 static int parseManageDSAit (
 844         Operation *op,
 845         SlapReply *rs,
 846         LDAPControl *ctrl )
 847 {
 848         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 849                 rs->sr_text = "manageDSAit control specified multiple times";
 850                 return LDAP_PROTOCOL_ERROR;
 851         }
 852
 853         if ( ctrl->ldctl_value.bv_len ) {
 854                 rs->sr_text = "manageDSAit control value not empty";
 855                 return LDAP_PROTOCOL_ERROR;
 856         }
 857
 858         op->o_managedsait = ctrl->ldctl_iscritical
 859                 ? SLAP_CONTROL_CRITICAL
 860                 : SLAP_CONTROL_NONCRITICAL;
 861
 862         return LDAP_SUCCESS;
 863 }
 864
 865 static int parseProxyAuthz (
 866         Operation *op,
 867         SlapReply *rs,
 868         LDAPControl *ctrl )
 869 {
 870         int             rc;
 871         struct berval   dn = BER_BVNULL;
 872
 873         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 874                 rs->sr_text = "proxy authorization control specified multiple times";
 875                 return LDAP_PROTOCOL_ERROR;
 876         }
 877
 878         op->o_proxy_authz = ctrl->ldctl_iscritical
 879                 ? SLAP_CONTROL_CRITICAL
 880                 : SLAP_CONTROL_NONCRITICAL;
 881
 882         Debug( LDAP_DEBUG_ARGS,
 883                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 884                 op->o_connid,
 885                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 886                 0 );
 887
 888         if ( ctrl->ldctl_value.bv_len == 0 ) {
 889                 Debug( LDAP_DEBUG_TRACE,
 890                         "parseProxyAuthz: conn=%lu anonymous\n",
 891                         op->o_connid, 0, 0 );
 892
 893                 /* anonymous */
 894                 op->o_ndn.bv_val[ 0 ] = '\0';
 895                 op->o_ndn.bv_len = 0;
 896
 897                 op->o_dn.bv_val[ 0 ] = '\0';
 898                 op->o_dn.bv_len = 0;
 899
 900                 return LDAP_SUCCESS;
 901         }
 902
 903         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 904                         NULL, &dn, SLAP_GETDN_AUTHZID );
 905
 906         /* FIXME: empty DN in proxyAuthz control should be legal... */
 907         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 908                 if ( dn.bv_val ) {
 909                         ch_free( dn.bv_val );
 910                 }
 911                 rs->sr_text = "authzId mapping failed";
 912                 return LDAP_PROXY_AUTHZ_FAILURE;
 913         }
 914
 915         Debug( LDAP_DEBUG_TRACE,
 916                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 917                 op->o_connid,
 918                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 919
 920         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 921
 922         if ( rc ) {
 923                 ch_free( dn.bv_val );
 924                 rs->sr_text = "not authorized to assume identity";
 925                 return LDAP_PROXY_AUTHZ_FAILURE;
 926         }
 927
 928         ch_free( op->o_ndn.bv_val );
 929         ch_free( op->o_dn.bv_val );
 930
 931         /*
 932          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 933          * from now on op->o_dn is normalized
 934          */
 935         op->o_ndn = dn;
 936         ber_dupbv( &op->o_dn, &dn );
 937
 938
 939         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 940             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 941
 942         return LDAP_SUCCESS;
 943 }
 944
 945 static int parseNoOp (
 946         Operation *op,
 947         SlapReply *rs,
 948         LDAPControl *ctrl )
 949 {
 950         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 951                 rs->sr_text = "noop control specified multiple times";
 952                 return LDAP_PROTOCOL_ERROR;
 953         }
 954
 955         if ( ctrl->ldctl_value.bv_len ) {
 956                 rs->sr_text = "noop control value not empty";
 957                 return LDAP_PROTOCOL_ERROR;
 958         }
 959
 960         op->o_noop = ctrl->ldctl_iscritical
 961                 ? SLAP_CONTROL_CRITICAL
 962                 : SLAP_CONTROL_NONCRITICAL;
 963
 964         return LDAP_SUCCESS;
 965 }
 966
 967 static int parsePagedResults (
 968         Operation *op,
 969         SlapReply *rs,
 970         LDAPControl *ctrl )
 971 {
 972         int             rc = LDAP_SUCCESS;
 973         ber_tag_t       tag;
 974         ber_int_t       size;
 975         BerElement      *ber;
 976         struct berval   cookie = BER_BVNULL;
 977         PagedResultsState       *ps;
 978
 979         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 980                 rs->sr_text = "paged results control specified multiple times";
 981                 return LDAP_PROTOCOL_ERROR;
 982         }
 983
 984         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 985                 rs->sr_text = "paged results control value is empty (or absent)";
 986                 return LDAP_PROTOCOL_ERROR;
 987         }
 988
 989         /* Parse the control value
 990          *      realSearchControlValue ::= SEQUENCE {
 991          *              size    INTEGER (0..maxInt),
 992          *                              -- requested page size from client
 993          *                              -- result set size estimate from server
 994          *              cookie  OCTET STRING
 995          * }
 996          */
 997         ber = ber_init( &ctrl->ldctl_value );
 998         if ( ber == NULL ) {
 999                 rs->sr_text = "internal error";
1000                 return LDAP_OTHER;
1001         }
1002
1003         tag = ber_scanf( ber, "{im}", &size, &cookie );
1004
1005         if ( tag == LBER_ERROR ) {
1006                 rs->sr_text = "paged results control could not be decoded";
1007                 rc = LDAP_PROTOCOL_ERROR;
1008                 goto done;
1009         }
1010
1011         if ( size < 0 ) {
1012                 rs->sr_text = "paged results control size invalid";
1013                 rc = LDAP_PROTOCOL_ERROR;
1014                 goto done;
1015         }
1016
1017         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
1018         *ps = op->o_conn->c_pagedresults_state;
1019         ps->ps_size = size;
1020         op->o_pagedresults_state = ps;
1021
1022         /* NOTE: according to RFC 2696 3.:
1023
1024     If the page size is greater than or equal to the sizeLimit value, the
1025     server should ignore the control as the request can be satisfied in a
1026     single page.
1027
1028          * NOTE: this assumes that the op->ors_slimit be set
1029          * before the controls are parsed.
1030          */
1031
1032         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
1033                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
1034
1035         } else if ( ctrl->ldctl_iscritical ) {
1036                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
1037
1038         } else {
1039                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
1040         }
1041
1042 done:;
1043         (void)ber_free( ber, 1 );
1044         return rc;
1045 }
1046
1047 #ifdef LDAP_DEVEL
1048 static int parseSortedResults (
1049         Operation *op,
1050         SlapReply *rs,
1051         LDAPControl *ctrl )
1052 {
1053         int             rc = LDAP_SUCCESS;
1054
1055         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1056                 rs->sr_text = "sorted results control specified multiple times";
1057                 return LDAP_PROTOCOL_ERROR;
1058         }
1059
1060         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1061                 rs->sr_text = "sorted results control value is empty (or absent)";
1062                 return LDAP_PROTOCOL_ERROR;
1063         }
1064
1065         /* blow off parsing the value */
1066
1067         op->o_sortedresults = ctrl->ldctl_iscritical
1068                 ? SLAP_CONTROL_CRITICAL
1069                 : SLAP_CONTROL_NONCRITICAL;
1070
1071         return rc;
1072 }
1073 #endif
1074
1075 static int parseAssert (
1076         Operation *op,
1077         SlapReply *rs,
1078         LDAPControl *ctrl )
1079 {
1080         BerElement      *ber;
1081         struct berval   fstr = BER_BVNULL;
1082
1083         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1084                 rs->sr_text = "assert control specified multiple times";
1085                 return LDAP_PROTOCOL_ERROR;
1086         }
1087
1088         if ( ctrl->ldctl_value.bv_len == 0 ) {
1089                 rs->sr_text = "assert control value is empty (or absent)";
1090                 return LDAP_PROTOCOL_ERROR;
1091         }
1092
1093         ber = ber_init( &(ctrl->ldctl_value) );
1094         if (ber == NULL) {
1095                 rs->sr_text = "assert control: internal error";
1096                 return LDAP_OTHER;
1097         }
1098
1099         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
1100                 &rs->sr_text);
1101         if( rs->sr_err != LDAP_SUCCESS ) {
1102                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1103                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1104                         send_ldap_disconnect( op, rs );
1105                         rs->sr_err = SLAPD_DISCONNECT;
1106                 } else {
1107                         send_ldap_result( op, rs );
1108                 }
1109                 if( op->o_assertion != NULL ) {
1110                         filter_free_x( op, op->o_assertion );
1111                 }
1112                 return rs->sr_err;
1113         }
1114
1115 #ifdef LDAP_DEBUG
1116         filter2bv_x( op, op->o_assertion, &fstr );
1117
1118         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1119                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1120         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1121 #endif
1122
1123         op->o_assert = ctrl->ldctl_iscritical
1124                 ? SLAP_CONTROL_CRITICAL
1125                 : SLAP_CONTROL_NONCRITICAL;
1126
1127         rs->sr_err = LDAP_SUCCESS;
1128         return LDAP_SUCCESS;
1129 }
1130
1131 static int parsePreRead (
1132         Operation *op,
1133         SlapReply *rs,
1134         LDAPControl *ctrl )
1135 {
1136         ber_len_t siz, off, i;
1137         AttributeName *an = NULL;
1138         BerElement      *ber;
1139
1140         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1141                 rs->sr_text = "preread control specified multiple times";
1142                 return LDAP_PROTOCOL_ERROR;
1143         }
1144
1145         if ( ctrl->ldctl_value.bv_len == 0 ) {
1146                 rs->sr_text = "preread control value is empty (or absent)";
1147                 return LDAP_PROTOCOL_ERROR;
1148         }
1149
1150         ber = ber_init( &(ctrl->ldctl_value) );
1151         if (ber == NULL) {
1152                 rs->sr_text = "preread control: internal error";
1153                 return LDAP_OTHER;
1154         }
1155
1156         siz = sizeof( AttributeName );
1157         off = offsetof( AttributeName, an_name );
1158         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1159                 rs->sr_text = "preread control: decoding error";
1160                 return LDAP_PROTOCOL_ERROR;
1161         }
1162
1163         for( i=0; i<siz; i++ ) {
1164                 int             rc = LDAP_SUCCESS;
1165                 const char      *dummy = NULL;
1166
1167                 an[i].an_desc = NULL;
1168                 an[i].an_oc = NULL;
1169                 an[i].an_oc_exclude = 0;
1170                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1171                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1172                         rs->sr_text = dummy
1173                                 ? dummy
1174                                 : "postread control: unknown attributeType";
1175                         return rc;
1176                 }
1177         }
1178
1179         op->o_preread = ctrl->ldctl_iscritical
1180                 ? SLAP_CONTROL_CRITICAL
1181                 : SLAP_CONTROL_NONCRITICAL;
1182
1183         op->o_preread_attrs = an;
1184
1185         rs->sr_err = LDAP_SUCCESS;
1186         return LDAP_SUCCESS;
1187 }
1188
1189 static int parsePostRead (
1190         Operation *op,
1191         SlapReply *rs,
1192         LDAPControl *ctrl )
1193 {
1194         ber_len_t siz, off, i;
1195         AttributeName *an = NULL;
1196         BerElement      *ber;
1197
1198         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1199                 rs->sr_text = "postread control specified multiple times";
1200                 return LDAP_PROTOCOL_ERROR;
1201         }
1202
1203         if ( ctrl->ldctl_value.bv_len == 0 ) {
1204                 rs->sr_text = "postread control value is empty (or absent)";
1205                 return LDAP_PROTOCOL_ERROR;
1206         }
1207
1208         ber = ber_init( &(ctrl->ldctl_value) );
1209         if (ber == NULL) {
1210                 rs->sr_text = "postread control: internal error";
1211                 return LDAP_OTHER;
1212         }
1213
1214         siz = sizeof( AttributeName );
1215         off = offsetof( AttributeName, an_name );
1216         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1217                 rs->sr_text = "postread control: decoding error";
1218                 return LDAP_PROTOCOL_ERROR;
1219         }
1220
1221         for( i=0; i<siz; i++ ) {
1222                 int             rc = LDAP_SUCCESS;
1223                 const char      *dummy = NULL;
1224
1225                 an[i].an_desc = NULL;
1226                 an[i].an_oc = NULL;
1227                 an[i].an_oc_exclude = 0;
1228                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1229                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1230                         rs->sr_text = dummy
1231                                 ? dummy
1232                                 : "postread control: unknown attributeType";
1233                         return rc;
1234                 }
1235         }
1236
1237         op->o_postread = ctrl->ldctl_iscritical
1238                 ? SLAP_CONTROL_CRITICAL
1239                 : SLAP_CONTROL_NONCRITICAL;
1240
1241         op->o_postread_attrs = an;
1242
1243         rs->sr_err = LDAP_SUCCESS;
1244         return LDAP_SUCCESS;
1245 }
1246
1247 static int parseValuesReturnFilter (
1248         Operation *op,
1249         SlapReply *rs,
1250         LDAPControl *ctrl )
1251 {
1252         BerElement      *ber;
1253         struct berval   fstr = BER_BVNULL;
1254
1255         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1256                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1257                 return LDAP_PROTOCOL_ERROR;
1258         }
1259
1260         if ( ctrl->ldctl_value.bv_len == 0 ) {
1261                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1262                 return LDAP_PROTOCOL_ERROR;
1263         }
1264
1265         ber = ber_init( &(ctrl->ldctl_value) );
1266         if (ber == NULL) {
1267                 rs->sr_text = "internal error";
1268                 return LDAP_OTHER;
1269         }
1270
1271         rs->sr_err = get_vrFilter( op, ber,
1272                 (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1273
1274         if( rs->sr_err != LDAP_SUCCESS ) {
1275                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1276                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1277                         send_ldap_disconnect( op, rs );
1278                         rs->sr_err = SLAPD_DISCONNECT;
1279                 } else {
1280                         send_ldap_result( op, rs );
1281                 }
1282                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1283         }
1284 #ifdef LDAP_DEBUG
1285         else {
1286                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1287         }
1288
1289         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1290                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1291         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1292 #endif
1293
1294         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1295                 ? SLAP_CONTROL_CRITICAL
1296                 : SLAP_CONTROL_NONCRITICAL;
1297
1298         rs->sr_err = LDAP_SUCCESS;
1299         return LDAP_SUCCESS;
1300 }
1301
1302 static int parseSubentries (
1303         Operation *op,
1304         SlapReply *rs,
1305         LDAPControl *ctrl )
1306 {
1307         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1308                 rs->sr_text = "subentries control specified multiple times";
1309                 return LDAP_PROTOCOL_ERROR;
1310         }
1311
1312         /* FIXME: should use BER library */
1313         if( ( ctrl->ldctl_value.bv_len != 3 )
1314                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1315                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1316         {
1317                 rs->sr_text = "subentries control value encoding is bogus";
1318                 return LDAP_PROTOCOL_ERROR;
1319         }
1320
1321         op->o_subentries = ctrl->ldctl_iscritical
1322                 ? SLAP_CONTROL_CRITICAL
1323                 : SLAP_CONTROL_NONCRITICAL;
1324
1325         if (ctrl->ldctl_value.bv_val[2]) {
1326                 set_subentries_visibility( op );
1327         }
1328
1329         return LDAP_SUCCESS;
1330 }
1331
1332 static int parsePermissiveModify (
1333         Operation *op,
1334         SlapReply *rs,
1335         LDAPControl *ctrl )
1336 {
1337         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1338                 rs->sr_text = "permissiveModify control specified multiple times";
1339                 return LDAP_PROTOCOL_ERROR;
1340         }
1341
1342         if ( ctrl->ldctl_value.bv_len ) {
1343                 rs->sr_text = "permissiveModify control value not empty";
1344                 return LDAP_PROTOCOL_ERROR;
1345         }
1346
1347         op->o_permissive_modify = ctrl->ldctl_iscritical
1348                 ? SLAP_CONTROL_CRITICAL
1349                 : SLAP_CONTROL_NONCRITICAL;
1350
1351         return LDAP_SUCCESS;
1352 }
1353
1354 static int parseDomainScope (
1355         Operation *op,
1356         SlapReply *rs,
1357         LDAPControl *ctrl )
1358 {
1359         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1360                 rs->sr_text = "domainScope control specified multiple times";
1361                 return LDAP_PROTOCOL_ERROR;
1362         }
1363
1364         if ( ctrl->ldctl_value.bv_len ) {
1365                 rs->sr_text = "domainScope control value not empty";
1366                 return LDAP_PROTOCOL_ERROR;
1367         }
1368
1369         op->o_domain_scope = ctrl->ldctl_iscritical
1370                 ? SLAP_CONTROL_CRITICAL
1371                 : SLAP_CONTROL_NONCRITICAL;
1372
1373         return LDAP_SUCCESS;
1374 }
1375
1376 #ifdef SLAP_CONTROL_X_TREE_DELETE
1377 static int parseTreeDelete (
1378         Operation *op,
1379         SlapReply *rs,
1380         LDAPControl *ctrl )
1381 {
1382         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1383                 rs->sr_text = "treeDelete control specified multiple times";
1384                 return LDAP_PROTOCOL_ERROR;
1385         }
1386
1387         if ( ctrl->ldctl_value.bv_len ) {
1388                 rs->sr_text = "treeDelete control value not empty";
1389                 return LDAP_PROTOCOL_ERROR;
1390         }
1391
1392         op->o_tree_delete = ctrl->ldctl_iscritical
1393                 ? SLAP_CONTROL_CRITICAL
1394                 : SLAP_CONTROL_NONCRITICAL;
1395
1396         return LDAP_SUCCESS;
1397 }
1398 #endif
1399
1400 static int parseSearchOptions (
1401         Operation *op,
1402         SlapReply *rs,
1403         LDAPControl *ctrl )
1404 {
1405         BerElement *ber;
1406         ber_int_t search_flags;
1407         ber_tag_t tag;
1408
1409         if ( ctrl->ldctl_value.bv_len == 0 ) {
1410                 rs->sr_text = "searchOptions control value is empty (or absent)";
1411                 return LDAP_PROTOCOL_ERROR;
1412         }
1413
1414         ber = ber_init( &ctrl->ldctl_value );
1415         if( ber == NULL ) {
1416                 rs->sr_text = "internal error";
1417                 return LDAP_OTHER;
1418         }
1419
1420         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1421                 rs->sr_text = "searchOptions control decoding error";
1422                 return LDAP_PROTOCOL_ERROR;
1423         }
1424
1425         (void) ber_free( ber, 1 );
1426
1427         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1428                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1429                         rs->sr_text = "searchOptions control specified multiple times "
1430                                 "or with domainScope control";
1431                         return LDAP_PROTOCOL_ERROR;
1432                 }
1433
1434                 op->o_domain_scope = ctrl->ldctl_iscritical
1435                         ? SLAP_CONTROL_CRITICAL
1436                         : SLAP_CONTROL_NONCRITICAL;
1437         }
1438
1439         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1440                 /* Other search flags not recognised so far,
1441                  * including:
1442                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1443                  */
1444                 rs->sr_text = "searchOptions contained unrecognized flag";
1445                 return LDAP_UNWILLING_TO_PERFORM;
1446         }
1447
1448         return LDAP_SUCCESS;
1449 }
1450