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 1998-2005 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 parseManageDIT;
  33 #endif
  34 static SLAP_CTRL_PARSE_FN parseManageDSAit;
  35 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
  36 static SLAP_CTRL_PARSE_FN parseModifyIncrement;
  37 #endif
  38 static SLAP_CTRL_PARSE_FN parseNoOp;
  39 static SLAP_CTRL_PARSE_FN parsePagedResults;
  40 #ifdef LDAP_DEVEL
  41 static SLAP_CTRL_PARSE_FN parseSortedResults;
  42 #endif
  43 static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
  44 static SLAP_CTRL_PARSE_FN parsePermissiveModify;
  45 static SLAP_CTRL_PARSE_FN parseDomainScope;
  46 #ifdef SLAP_CONTROL_X_TREE_DELETE
  47 static SLAP_CTRL_PARSE_FN parseTreeDelete;
  48 #endif
  49 static SLAP_CTRL_PARSE_FN parseSearchOptions;
  50 static SLAP_CTRL_PARSE_FN parseSubentries;
  51
  52 #undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
  53
  54 const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
  55 const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
  56
  57 struct slap_control_ids slap_cids;
  58
  59 struct slap_control {
  60         /* Control OID */
  61         char *sc_oid;
  62
  63         /* The controlID for this control */
  64         int sc_cid;
  65
  66         /* Operations supported by control */
  67         slap_mask_t sc_mask;
  68
  69         /* Extended operations supported by control */
  70         char **sc_extendedops;
  71
  72         /* Control parsing callback */
  73         SLAP_CTRL_PARSE_FN *sc_parse;
  74
  75         LDAP_SLIST_ENTRY(slap_control) sc_next;
  76 };
  77
  78 static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
  79         = LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
  80
  81 /*
  82  * all known request control OIDs should be added to this list
  83  */
  84 /*
  85  * NOTE: initialize num_known_controls to 1 so that cid = 0 always
  86  * addresses an undefined control; this allows to safely test for
  87  * well known controls even if they are not registered, e.g. if
  88  * they get moved to modules.  An example is sc_LDAPsync, which
  89  * is implemented in the syncprov overlay and thus, if configured
  90  * as dynamic module, may not be registered.  One side effect is that
  91  * slap_known_controls[0] == NULL, so it should always be used
  92  * starting from 1.
  93  * FIXME: should we define the "undefined control" oid?
  94  */
  95 char *slap_known_controls[SLAP_MAX_CIDS+1];
  96 static int num_known_controls = 1;
  97
  98 static char *proxy_authz_extops[] = {
  99         LDAP_EXOP_MODIFY_PASSWD,
 100         LDAP_EXOP_X_WHO_AM_I,
 101         NULL
 102 };
 103
 104 static struct slap_control control_defs[] = {
 105         {  LDAP_CONTROL_ASSERT,
 106                 (int)offsetof(struct slap_control_ids, sc_assert),
 107                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 108                 parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 109         { LDAP_CONTROL_PRE_READ,
 110                 (int)offsetof(struct slap_control_ids, sc_preRead),
 111                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 112                 parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 113         { LDAP_CONTROL_POST_READ,
 114                 (int)offsetof(struct slap_control_ids, sc_postRead),
 115                 SLAP_CTRL_HIDE|SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME, NULL,
 116                 parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 117         { LDAP_CONTROL_VALUESRETURNFILTER,
 118                 (int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
 119                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 120                 parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 121         { LDAP_CONTROL_PAGEDRESULTS,
 122                 (int)offsetof(struct slap_control_ids, sc_pagedResults),
 123                 SLAP_CTRL_SEARCH, NULL,
 124                 parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 125 #ifdef LDAP_DEVEL
 126         { LDAP_CONTROL_SORTREQUEST,
 127                 (int)offsetof(struct slap_control_ids, sc_sortedResults),
 128                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE, NULL,
 129                 parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 130 #endif
 131 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
 132         { LDAP_CONTROL_X_DOMAIN_SCOPE,
 133                 (int)offsetof(struct slap_control_ids, sc_domainScope),
 134                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 135                 parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 136 #endif
 137 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
 138         { LDAP_CONTROL_X_PERMISSIVE_MODIFY,
 139                 (int)offsetof(struct slap_control_ids, sc_permissiveModify),
 140                 SLAP_CTRL_MODIFY, NULL,
 141                 parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 142 #endif
 143 #ifdef SLAP_CONTROL_X_TREE_DELETE
 144         { LDAP_CONTROL_X_TREE_DELETE,
 145                 (int)offsetof(struct slap_control_ids, sc_treeDelete),
 146                 SLAP_CTRL_HIDE|SLAP_CTRL_DELETE, NULL,
 147                 parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 148 #endif
 149 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
 150         { LDAP_CONTROL_X_SEARCH_OPTIONS,
 151                 (int)offsetof(struct slap_control_ids, sc_searchOptions),
 152                 SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH, NULL,
 153                 parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 154 #endif
 155 #ifdef LDAP_CONTROL_SUBENTRIES
 156         { LDAP_CONTROL_SUBENTRIES,
 157                 (int)offsetof(struct slap_control_ids, sc_subentries),
 158                 SLAP_CTRL_SEARCH, NULL,
 159                 parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 160 #endif
 161         { LDAP_CONTROL_NOOP,
 162                 (int)offsetof(struct slap_control_ids, sc_noOp),
 163                 SLAP_CTRL_HIDE|SLAP_CTRL_ACCESS, NULL,
 164                 parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 165 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 166         { LDAP_CONTROL_MODIFY_INCREMENT,
 167                 (int)offsetof(struct slap_control_ids, sc_modifyIncrement),
 168                 SLAP_CTRL_HIDE|SLAP_CTRL_MODIFY, NULL,
 169                 parseModifyIncrement, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 170 #endif
 171 #ifdef LDAP_DEVEL
 172         { LDAP_CONTROL_MANAGEDIT,
 173                 (int)offsetof(struct slap_control_ids, sc_manageDIT),
 174                 SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE, NULL,
 175                 parseManageDIT, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 176 #endif
 177         { LDAP_CONTROL_MANAGEDSAIT,
 178                 (int)offsetof(struct slap_control_ids, sc_manageDSAit),
 179                 SLAP_CTRL_ACCESS, NULL,
 180                 parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 181         { LDAP_CONTROL_PROXY_AUTHZ,
 182                 (int)offsetof(struct slap_control_ids, sc_proxyAuthz),
 183                 SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS, proxy_authz_extops,
 184                 parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
 185         { NULL, 0, 0, NULL, 0, LDAP_SLIST_ENTRY_INITIALIZER(next) }
 186 };
 187
 188 /*
 189  * Register a supported control.
 190  *
 191  * This can be called by an OpenLDAP plugin or, indirectly, by a
 192  * SLAPI plugin calling slapi_register_supported_control().
 193  */
 194 int
 195 register_supported_control(const char *controloid,
 196         slap_mask_t controlmask,
 197         char **controlexops,
 198         SLAP_CTRL_PARSE_FN *controlparsefn,
 199         int *controlcid)
 200 {
 201         struct slap_control *sc;
 202         int i;
 203
 204         if ( num_known_controls >= SLAP_MAX_CIDS ) {
 205                 Debug( LDAP_DEBUG_ANY, "Too many controls registered."
 206                         " Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
 207                 SLAP_MAX_CIDS, 0, 0 );
 208                 return LDAP_OTHER;
 209         }
 210
 211         if ( controloid == NULL ) return LDAP_PARAM_ERROR;
 212
 213         /* sanity check - should never happen */
 214         for ( i = 0; slap_known_controls[ i ]; i++ ) {
 215                 if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
 216                         Debug( LDAP_DEBUG_ANY,
 217                                 "Control %s already registered.\n",
 218                                 controloid, 0, 0 );
 219                         return LDAP_PARAM_ERROR;
 220                 }
 221         }
 222
 223         sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
 224         if ( sc == NULL ) return LDAP_NO_MEMORY;
 225
 226         sc->sc_oid = ch_strdup( controloid );
 227         sc->sc_mask = controlmask;
 228         if ( controlexops != NULL ) {
 229                 sc->sc_extendedops = ldap_charray_dup( controlexops );
 230                 if ( sc->sc_extendedops == NULL ) {
 231                         ch_free( sc );
 232                         return LDAP_NO_MEMORY;
 233                 }
 234         } else {
 235                 sc->sc_extendedops = NULL;
 236         }
 237         sc->sc_parse = controlparsefn;
 238
 239         if ( controlcid ) *controlcid = num_known_controls;
 240         sc->sc_cid = num_known_controls;
 241
 242         /* Update slap_known_controls, too. */
 243         slap_known_controls[num_known_controls-1] = sc->sc_oid;
 244         slap_known_controls[num_known_controls++] = NULL;
 245
 246         LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
 247         LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
 248         return LDAP_SUCCESS;
 249 }
 250
 251 /*
 252  * One-time initialization of internal controls.
 253  */
 254 int
 255 slap_controls_init( void )
 256 {
 257         int i, rc;
 258
 259         rc = LDAP_SUCCESS;
 260
 261         for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
 262                 int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
 263                 rc = register_supported_control( control_defs[i].sc_oid,
 264                         control_defs[i].sc_mask, control_defs[i].sc_extendedops,
 265                         control_defs[i].sc_parse, cid );
 266                 if ( rc != LDAP_SUCCESS ) break;
 267         }
 268
 269         return rc;
 270 }
 271
 272 /*
 273  * Free memory associated with list of supported controls.
 274  */
 275 void
 276 controls_destroy( void )
 277 {
 278         struct slap_control *sc;
 279
 280         while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
 281                 sc = LDAP_SLIST_FIRST(&controls_list);
 282                 LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
 283
 284                 ch_free( sc->sc_oid );
 285                 if ( sc->sc_extendedops != NULL ) {
 286                         ldap_charray_free( sc->sc_extendedops );
 287                 }
 288                 ch_free( sc );
 289         }
 290 }
 291
 292 /*
 293  * Format the supportedControl attribute of the root DSE,
 294  * detailing which controls are supported by the directory
 295  * server.
 296  */
 297 int
 298 controls_root_dse_info( Entry *e )
 299 {
 300         AttributeDescription *ad_supportedControl
 301                 = slap_schema.si_ad_supportedControl;
 302         struct berval vals[2];
 303         struct slap_control *sc;
 304
 305         vals[1].bv_val = NULL;
 306         vals[1].bv_len = 0;
 307
 308         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 309                 if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
 310
 311                 vals[0].bv_val = sc->sc_oid;
 312                 vals[0].bv_len = strlen( sc->sc_oid );
 313
 314                 if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
 315                         return -1;
 316                 }
 317         }
 318
 319         return 0;
 320 }
 321
 322 /*
 323  * Return a list of OIDs and operation masks for supported
 324  * controls. Used by SLAPI.
 325  */
 326 int
 327 get_supported_controls(char ***ctrloidsp,
 328         slap_mask_t **ctrlmasks)
 329 {
 330         int n;
 331         char **oids;
 332         slap_mask_t *masks;
 333         struct slap_control *sc;
 334
 335         n = 0;
 336
 337         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 338                 n++;
 339         }
 340
 341         if ( n == 0 ) {
 342                 *ctrloidsp = NULL;
 343                 *ctrlmasks = NULL;
 344                 return LDAP_SUCCESS;
 345         }
 346
 347         oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
 348         if ( oids == NULL ) {
 349                 return LDAP_NO_MEMORY;
 350         }
 351         masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
 352         if  ( masks == NULL ) {
 353                 ch_free( oids );
 354                 return LDAP_NO_MEMORY;
 355         }
 356
 357         n = 0;
 358
 359         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 360                 oids[n] = ch_strdup( sc->sc_oid );
 361                 masks[n] = sc->sc_mask;
 362                 n++;
 363         }
 364         oids[n] = NULL;
 365         masks[n] = 0;
 366
 367         *ctrloidsp = oids;
 368         *ctrlmasks = masks;
 369
 370         return LDAP_SUCCESS;
 371 }
 372
 373 /*
 374  * Find a control given its OID.
 375  */
 376 static struct slap_control *
 377 find_ctrl( const char *oid )
 378 {
 379         struct slap_control *sc;
 380
 381         LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
 382                 if ( strcmp( oid, sc->sc_oid ) == 0 ) {
 383                         return sc;
 384                 }
 385         }
 386
 387         return NULL;
 388 }
 389
 390 int
 391 slap_find_control_id(
 392         const char *oid,
 393         int *cid )
 394 {
 395         struct slap_control *ctrl = find_ctrl( oid );
 396         if ( ctrl ) {
 397                 if ( cid ) *cid = ctrl->sc_cid;
 398                 return LDAP_SUCCESS;
 399         }
 400         return LDAP_CONTROL_NOT_FOUND;
 401 }
 402
 403 int
 404 slap_global_control( Operation *op, const char *oid, int *cid )
 405 {
 406         struct slap_control *ctrl = find_ctrl( oid );
 407
 408         if ( ctrl == NULL ) {
 409                 /* should not be reachable */
 410                 Debug( LDAP_DEBUG_ANY,
 411                         "slap_global_control: unrecognized control: %s\n",
 412                         oid, 0, 0 );
 413                 return LDAP_CONTROL_NOT_FOUND;
 414         }
 415
 416         if ( cid ) *cid = ctrl->sc_cid;
 417
 418         if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
 419                 ( ( op->o_tag & LDAP_REQ_SEARCH ) &&
 420                 ( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
 421         {
 422                 return LDAP_COMPARE_TRUE;
 423         }
 424
 425         Debug( LDAP_DEBUG_TRACE,
 426                 "slap_global_control: unavailable control: %s\n",
 427                 oid, 0, 0 );
 428
 429         return LDAP_COMPARE_FALSE;
 430 }
 431
 432 void slap_free_ctrls(
 433         Operation *op,
 434         LDAPControl **ctrls )
 435 {
 436         int i;
 437
 438         for (i=0; ctrls[i]; i++) {
 439                 op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
 440         }
 441         op->o_tmpfree( ctrls, op->o_tmpmemctx );
 442 }
 443
 444 int slap_parse_ctrl(
 445         Operation *op,
 446         SlapReply *rs,
 447         LDAPControl *control,
 448         const char **text )
 449 {
 450         struct slap_control *sc;
 451         int rc;
 452
 453         sc = find_ctrl( control->ldctl_oid );
 454         if( sc != NULL ) {
 455                 /* recognized control */
 456                 slap_mask_t tagmask;
 457                 switch( op->o_tag ) {
 458                 case LDAP_REQ_ADD:
 459                         tagmask = SLAP_CTRL_ADD;
 460                         break;
 461                 case LDAP_REQ_BIND:
 462                         tagmask = SLAP_CTRL_BIND;
 463                         break;
 464                 case LDAP_REQ_COMPARE:
 465                         tagmask = SLAP_CTRL_COMPARE;
 466                         break;
 467                 case LDAP_REQ_DELETE:
 468                         tagmask = SLAP_CTRL_DELETE;
 469                         break;
 470                 case LDAP_REQ_MODIFY:
 471                         tagmask = SLAP_CTRL_MODIFY;
 472                         break;
 473                 case LDAP_REQ_RENAME:
 474                         tagmask = SLAP_CTRL_RENAME;
 475                         break;
 476                 case LDAP_REQ_SEARCH:
 477                         tagmask = SLAP_CTRL_SEARCH;
 478                         break;
 479                 case LDAP_REQ_UNBIND:
 480                         tagmask = SLAP_CTRL_UNBIND;
 481                         break;
 482                 case LDAP_REQ_ABANDON:
 483                         tagmask = SLAP_CTRL_ABANDON;
 484                         break;
 485                 case LDAP_REQ_EXTENDED:
 486                         tagmask=~0L;
 487                         assert( op->ore_reqoid.bv_val != NULL );
 488                         if( sc->sc_extendedops != NULL ) {
 489                                 int i;
 490                                 for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 491                                         if( strcmp( op->ore_reqoid.bv_val,
 492                                                 sc->sc_extendedops[i] ) == 0 )
 493                                         {
 494                                                 tagmask=0L;
 495                                                 break;
 496                                         }
 497                                 }
 498                         }
 499                         break;
 500                 default:
 501                         *text = "controls internal error";
 502                         return LDAP_OTHER;
 503                 }
 504
 505                 if (( sc->sc_mask & tagmask ) == tagmask ) {
 506                         /* available extension */
 507                         int     rc;
 508
 509                         if( !sc->sc_parse ) {
 510                                 *text = "not yet implemented";
 511                                 return LDAP_OTHER;
 512                         }
 513
 514                         rc = sc->sc_parse( op, rs, control );
 515                         if ( rc ) {
 516                                 assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 517                                 return rc;
 518                         }
 519
 520                 } else if( control->ldctl_iscritical ) {
 521                         /* unavailable CRITICAL control */
 522                         *text = "critical extension is unavailable";
 523                         return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 524                 }
 525         } else if( control->ldctl_iscritical ) {
 526                 /* unrecognized CRITICAL control */
 527                 *text = "critical extension is not recognized";
 528                 return LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 529         }
 530
 531         return LDAP_SUCCESS;
 532 }
 533
 534 int get_ctrls(
 535         Operation *op,
 536         SlapReply *rs,
 537         int sendres )
 538 {
 539         int nctrls = 0;
 540         ber_tag_t tag;
 541         ber_len_t len;
 542         char *opaque;
 543         BerElement *ber = op->o_ber;
 544         struct berval bv;
 545
 546         len = ber_pvt_ber_remaining(ber);
 547
 548         if( len == 0) {
 549                 /* no controls */
 550                 rs->sr_err = LDAP_SUCCESS;
 551                 return rs->sr_err;
 552         }
 553
 554         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 555                 if( tag == LBER_ERROR ) {
 556                         rs->sr_err = SLAPD_DISCONNECT;
 557                         rs->sr_text = "unexpected data in PDU";
 558                 }
 559
 560                 goto return_results;
 561         }
 562
 563         Debug( LDAP_DEBUG_TRACE,
 564                 "=> get_ctrls\n", 0, 0, 0 );
 565
 566         if( op->o_protocol < LDAP_VERSION3 ) {
 567                 rs->sr_err = SLAPD_DISCONNECT;
 568                 rs->sr_text = "controls require LDAPv3";
 569                 goto return_results;
 570         }
 571
 572         /* one for first control, one for termination */
 573         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 574
 575 #if 0
 576         if( op->ctrls == NULL ) {
 577                 rs->sr_err = LDAP_NO_MEMORY;
 578                 rs->sr_text = "no memory";
 579                 goto return_results;
 580         }
 581 #endif
 582
 583         op->o_ctrls[nctrls] = NULL;
 584
 585         /* step through each element */
 586         for( tag = ber_first_element( ber, &len, &opaque );
 587                 tag != LBER_ERROR;
 588                 tag = ber_next_element( ber, &len, opaque ) )
 589         {
 590                 LDAPControl *c;
 591                 LDAPControl **tctrls;
 592
 593                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 594                 memset(c, 0, sizeof(LDAPControl));
 595
 596                 /* allocate pointer space for current controls (nctrls)
 597                  * + this control + extra NULL
 598                  */
 599                 tctrls = op->o_tmprealloc( op->o_ctrls,
 600                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 601
 602 #if 0
 603                 if( tctrls == NULL ) {
 604                         ch_free( c );
 605                         ldap_controls_free(op->o_ctrls);
 606                         op->o_ctrls = NULL;
 607
 608                         rs->sr_err = LDAP_NO_MEMORY;
 609                         rs->sr_text = "no memory";
 610                         goto return_results;
 611                 }
 612 #endif
 613                 op->o_ctrls = tctrls;
 614
 615                 op->o_ctrls[nctrls++] = c;
 616                 op->o_ctrls[nctrls] = NULL;
 617
 618                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 619                 c->ldctl_oid = bv.bv_val;
 620
 621                 if( tag == LBER_ERROR ) {
 622                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 623                                 0, 0, 0 );
 624
 625                         slap_free_ctrls( op, op->o_ctrls );
 626                         op->o_ctrls = NULL;
 627                         rs->sr_err = SLAPD_DISCONNECT;
 628                         rs->sr_text = "decoding controls error";
 629                         goto return_results;
 630
 631                 } else if( c->ldctl_oid == NULL ) {
 632                         Debug( LDAP_DEBUG_TRACE,
 633                                 "get_ctrls: conn %lu got emtpy OID.\n",
 634                                 op->o_connid, 0, 0 );
 635
 636                         slap_free_ctrls( op, op->o_ctrls );
 637                         op->o_ctrls = NULL;
 638                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 639                         rs->sr_text = "OID field is empty";
 640                         goto return_results;
 641                 }
 642
 643                 tag = ber_peek_tag( ber, &len );
 644
 645                 if( tag == LBER_BOOLEAN ) {
 646                         ber_int_t crit;
 647                         tag = ber_scanf( ber, "b", &crit );
 648
 649                         if( tag == LBER_ERROR ) {
 650                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 651                                         0, 0, 0 );
 652                                 slap_free_ctrls( op, op->o_ctrls );
 653                                 op->o_ctrls = NULL;
 654                                 rs->sr_err = SLAPD_DISCONNECT;
 655                                 rs->sr_text = "decoding controls error";
 656                                 goto return_results;
 657                         }
 658
 659                         c->ldctl_iscritical = (crit != 0);
 660                         tag = ber_peek_tag( ber, &len );
 661                 }
 662
 663                 if( tag == LBER_OCTETSTRING ) {
 664                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 665
 666                         if( tag == LBER_ERROR ) {
 667                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 668                                         "%s (%scritical): get value failed.\n",
 669                                         op->o_connid, c->ldctl_oid,
 670                                         c->ldctl_iscritical ? "" : "non" );
 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
 679                 Debug( LDAP_DEBUG_TRACE,
 680                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 681                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 682
 683                 rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
 684                 if ( rs->sr_err != LDAP_SUCCESS ) {
 685                         goto return_results;
 686                 }
 687         }
 688
 689 return_results:
 690         Debug( LDAP_DEBUG_TRACE,
 691                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 692                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 693
 694         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 695                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 696                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 697                         send_ldap_disconnect( op, rs );
 698                         rs->sr_err = SLAPD_DISCONNECT;
 699                 } else {
 700                         send_ldap_result( op, rs );
 701                 }
 702         }
 703
 704         return rs->sr_err;
 705 }
 706
 707 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 708 static int parseModifyIncrement (
 709         Operation *op,
 710         SlapReply *rs,
 711         LDAPControl *ctrl )
 712 {
 713 #if 0
 714         if ( op->o_modifyIncrement != SLAP_CONTROL_NONE ) {
 715                 rs->sr_text = "modifyIncrement control specified multiple times";
 716                 return LDAP_PROTOCOL_ERROR;
 717         }
 718 #endif
 719
 720         if ( ctrl->ldctl_value.bv_len ) {
 721                 rs->sr_text = "modifyIncrement control value not empty";
 722                 return LDAP_PROTOCOL_ERROR;
 723         }
 724
 725 #if 0
 726         op->o_modifyIncrement = ctrl->ldctl_iscritical
 727                 ? SLAP_CONTROL_CRITICAL
 728                 : SLAP_CONTROL_NONCRITICAL;
 729 #endif
 730
 731         return LDAP_SUCCESS;
 732 }
 733 #endif
 734
 735 #ifdef LDAP_DEVEL
 736 static int parseManageDIT (
 737         Operation *op,
 738         SlapReply *rs,
 739         LDAPControl *ctrl )
 740 {
 741         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 742                 rs->sr_text = "manageDIT control specified multiple times";
 743                 return LDAP_PROTOCOL_ERROR;
 744         }
 745
 746         if ( ctrl->ldctl_value.bv_len ) {
 747                 rs->sr_text = "manageDIT control value not empty";
 748                 return LDAP_PROTOCOL_ERROR;
 749         }
 750
 751         op->o_managedit = ctrl->ldctl_iscritical
 752                 ? SLAP_CONTROL_CRITICAL
 753                 : SLAP_CONTROL_NONCRITICAL;
 754
 755         return LDAP_SUCCESS;
 756 }
 757 #endif
 758
 759 static int parseManageDSAit (
 760         Operation *op,
 761         SlapReply *rs,
 762         LDAPControl *ctrl )
 763 {
 764         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 765                 rs->sr_text = "manageDSAit control specified multiple times";
 766                 return LDAP_PROTOCOL_ERROR;
 767         }
 768
 769         if ( ctrl->ldctl_value.bv_len ) {
 770                 rs->sr_text = "manageDSAit control value not empty";
 771                 return LDAP_PROTOCOL_ERROR;
 772         }
 773
 774         op->o_managedsait = ctrl->ldctl_iscritical
 775                 ? SLAP_CONTROL_CRITICAL
 776                 : SLAP_CONTROL_NONCRITICAL;
 777
 778         return LDAP_SUCCESS;
 779 }
 780
 781 static int parseProxyAuthz (
 782         Operation *op,
 783         SlapReply *rs,
 784         LDAPControl *ctrl )
 785 {
 786         int             rc;
 787         struct berval   dn = BER_BVNULL;
 788
 789         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 790                 rs->sr_text = "proxy authorization control specified multiple times";
 791                 return LDAP_PROTOCOL_ERROR;
 792         }
 793
 794         op->o_proxy_authz = ctrl->ldctl_iscritical
 795                 ? SLAP_CONTROL_CRITICAL
 796                 : SLAP_CONTROL_NONCRITICAL;
 797
 798         Debug( LDAP_DEBUG_ARGS,
 799                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 800                 op->o_connid,
 801                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 802                 0 );
 803
 804         if ( ctrl->ldctl_value.bv_len == 0 ) {
 805                 Debug( LDAP_DEBUG_TRACE,
 806                         "parseProxyAuthz: conn=%lu anonymous\n",
 807                         op->o_connid, 0, 0 );
 808
 809                 /* anonymous */
 810                 op->o_ndn.bv_val[ 0 ] = '\0';
 811                 op->o_ndn.bv_len = 0;
 812
 813                 op->o_dn.bv_val[ 0 ] = '\0';
 814                 op->o_dn.bv_len = 0;
 815
 816                 return LDAP_SUCCESS;
 817         }
 818
 819         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 820                         NULL, &dn, SLAP_GETDN_AUTHZID );
 821
 822         /* FIXME: empty DN in proxyAuthz control should be legal... */
 823         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 824                 if ( dn.bv_val ) {
 825                         ch_free( dn.bv_val );
 826                 }
 827                 rs->sr_text = "authzId mapping failed";
 828                 return LDAP_PROXY_AUTHZ_FAILURE;
 829         }
 830
 831         Debug( LDAP_DEBUG_TRACE,
 832                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 833                 op->o_connid,
 834                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 835
 836         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 837
 838         if ( rc ) {
 839                 ch_free( dn.bv_val );
 840                 rs->sr_text = "not authorized to assume identity";
 841                 return LDAP_PROXY_AUTHZ_FAILURE;
 842         }
 843
 844         ch_free( op->o_ndn.bv_val );
 845         ch_free( op->o_dn.bv_val );
 846
 847         /*
 848          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 849          * from now on op->o_dn is normalized
 850          */
 851         op->o_ndn = dn;
 852         ber_dupbv( &op->o_dn, &dn );
 853
 854
 855         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 856             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 857
 858         return LDAP_SUCCESS;
 859 }
 860
 861 static int parseNoOp (
 862         Operation *op,
 863         SlapReply *rs,
 864         LDAPControl *ctrl )
 865 {
 866         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 867                 rs->sr_text = "noop control specified multiple times";
 868                 return LDAP_PROTOCOL_ERROR;
 869         }
 870
 871         if ( ctrl->ldctl_value.bv_len ) {
 872                 rs->sr_text = "noop control value not empty";
 873                 return LDAP_PROTOCOL_ERROR;
 874         }
 875
 876         op->o_noop = ctrl->ldctl_iscritical
 877                 ? SLAP_CONTROL_CRITICAL
 878                 : SLAP_CONTROL_NONCRITICAL;
 879
 880         return LDAP_SUCCESS;
 881 }
 882
 883 static int parsePagedResults (
 884         Operation *op,
 885         SlapReply *rs,
 886         LDAPControl *ctrl )
 887 {
 888         int             rc = LDAP_SUCCESS;
 889         ber_tag_t       tag;
 890         ber_int_t       size;
 891         BerElement      *ber;
 892         struct berval   cookie = BER_BVNULL;
 893         PagedResultsState       *ps;
 894
 895         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 896                 rs->sr_text = "paged results control specified multiple times";
 897                 return LDAP_PROTOCOL_ERROR;
 898         }
 899
 900         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 901                 rs->sr_text = "paged results control value is empty (or absent)";
 902                 return LDAP_PROTOCOL_ERROR;
 903         }
 904
 905         /* Parse the control value
 906          *      realSearchControlValue ::= SEQUENCE {
 907          *              size    INTEGER (0..maxInt),
 908          *                              -- requested page size from client
 909          *                              -- result set size estimate from server
 910          *              cookie  OCTET STRING
 911          * }
 912          */
 913         ber = ber_init( &ctrl->ldctl_value );
 914         if ( ber == NULL ) {
 915                 rs->sr_text = "internal error";
 916                 return LDAP_OTHER;
 917         }
 918
 919         tag = ber_scanf( ber, "{im}", &size, &cookie );
 920
 921         if ( tag == LBER_ERROR ) {
 922                 rs->sr_text = "paged results control could not be decoded";
 923                 rc = LDAP_PROTOCOL_ERROR;
 924                 goto done;
 925         }
 926
 927         if ( size < 0 ) {
 928                 rs->sr_text = "paged results control size invalid";
 929                 rc = LDAP_PROTOCOL_ERROR;
 930                 goto done;
 931         }
 932
 933 #if 0
 934         /* defer cookie decoding/checks to backend... */
 935         if ( cookie.bv_len ) {
 936                 PagedResultsCookie reqcookie;
 937                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 938                         /* bad cookie */
 939                         rs->sr_text = "paged results cookie is invalid";
 940                         rc = LDAP_PROTOCOL_ERROR;
 941                         goto done;
 942                 }
 943
 944                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 945
 946                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 947                         /* bad cookie */
 948                         rs->sr_text = "paged results cookie is invalid";
 949                         rc = LDAP_PROTOCOL_ERROR;
 950                         goto done;
 951
 952                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 953                         rs->sr_text = "paged results cookie is invalid or old";
 954                         rc = LDAP_UNWILLING_TO_PERFORM;
 955                         goto done;
 956                 }
 957
 958         } else {
 959                 /* Initial request.  Initialize state. */
 960 #if 0
 961                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 962                         /* There's another pagedResults control on the
 963                          * same connection; reject new pagedResults controls
 964                          * (allowed by RFC2696) */
 965                         rs->sr_text = "paged results cookie unavailable; try later";
 966                         rc = LDAP_UNWILLING_TO_PERFORM;
 967                         goto done;
 968                 }
 969 #endif
 970                 op->o_pagedresults_state.ps_cookie = 0;
 971                 op->o_pagedresults_state.ps_count = 0;
 972         }
 973 #endif
 974
 975         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
 976         *ps = op->o_conn->c_pagedresults_state;
 977         ps->ps_size = size;
 978         op->o_pagedresults_state = ps;
 979
 980         /* NOTE: according to RFC 2696 3.:
 981
 982     If the page size is greater than or equal to the sizeLimit value, the
 983     server should ignore the control as the request can be satisfied in a
 984     single page.
 985
 986          * NOTE: this assumes that the op->ors_slimit be set
 987          * before the controls are parsed.
 988          */
 989
 990         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 991                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
 992
 993         } else if ( ctrl->ldctl_iscritical ) {
 994                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
 995
 996         } else {
 997                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
 998         }
 999
1000 done:;
1001         (void)ber_free( ber, 1 );
1002         return rc;
1003 }
1004
1005 #ifdef LDAP_DEVEL
1006 static int parseSortedResults (
1007         Operation *op,
1008         SlapReply *rs,
1009         LDAPControl *ctrl )
1010 {
1011         int             rc = LDAP_SUCCESS;
1012
1013         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1014                 rs->sr_text = "sorted results control specified multiple times";
1015                 return LDAP_PROTOCOL_ERROR;
1016         }
1017
1018         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1019                 rs->sr_text = "sorted results control value is empty (or absent)";
1020                 return LDAP_PROTOCOL_ERROR;
1021         }
1022
1023         /* blow off parsing the value */
1024
1025         op->o_sortedresults = ctrl->ldctl_iscritical
1026                 ? SLAP_CONTROL_CRITICAL
1027                 : SLAP_CONTROL_NONCRITICAL;
1028
1029         return rc;
1030 }
1031 #endif
1032
1033 static int parseAssert (
1034         Operation *op,
1035         SlapReply *rs,
1036         LDAPControl *ctrl )
1037 {
1038         BerElement      *ber;
1039         struct berval   fstr = BER_BVNULL;
1040
1041         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1042                 rs->sr_text = "assert control specified multiple times";
1043                 return LDAP_PROTOCOL_ERROR;
1044         }
1045
1046         if ( ctrl->ldctl_value.bv_len == 0 ) {
1047                 rs->sr_text = "assert control value is empty (or absent)";
1048                 return LDAP_PROTOCOL_ERROR;
1049         }
1050
1051         ber = ber_init( &(ctrl->ldctl_value) );
1052         if (ber == NULL) {
1053                 rs->sr_text = "assert control: internal error";
1054                 return LDAP_OTHER;
1055         }
1056
1057         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion), &rs->sr_text);
1058
1059         if( rs->sr_err != LDAP_SUCCESS ) {
1060                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1061                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1062                         send_ldap_disconnect( op, rs );
1063                         rs->sr_err = SLAPD_DISCONNECT;
1064                 } else {
1065                         send_ldap_result( op, rs );
1066                 }
1067                 if( op->o_assertion != NULL ) {
1068                         filter_free_x( op, op->o_assertion );
1069                 }
1070                 return rs->sr_err;
1071         }
1072
1073 #ifdef LDAP_DEBUG
1074         filter2bv_x( op, op->o_assertion, &fstr );
1075
1076         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1077                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1078         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1079 #endif
1080
1081         op->o_assert = ctrl->ldctl_iscritical
1082                 ? SLAP_CONTROL_CRITICAL
1083                 : SLAP_CONTROL_NONCRITICAL;
1084
1085         rs->sr_err = LDAP_SUCCESS;
1086         return LDAP_SUCCESS;
1087 }
1088
1089 static int parsePreRead (
1090         Operation *op,
1091         SlapReply *rs,
1092         LDAPControl *ctrl )
1093 {
1094         ber_len_t siz, off, i;
1095         AttributeName *an = NULL;
1096         BerElement      *ber;
1097
1098         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1099                 rs->sr_text = "preread control specified multiple times";
1100                 return LDAP_PROTOCOL_ERROR;
1101         }
1102
1103         if ( ctrl->ldctl_value.bv_len == 0 ) {
1104                 rs->sr_text = "preread control value is empty (or absent)";
1105                 return LDAP_PROTOCOL_ERROR;
1106         }
1107
1108         ber = ber_init( &(ctrl->ldctl_value) );
1109         if (ber == NULL) {
1110                 rs->sr_text = "preread control: internal error";
1111                 return LDAP_OTHER;
1112         }
1113
1114         siz = sizeof( AttributeName );
1115         off = offsetof( AttributeName, an_name );
1116         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1117                 rs->sr_text = "preread control: decoding error";
1118                 return LDAP_PROTOCOL_ERROR;
1119         }
1120
1121         for( i=0; i<siz; i++ ) {
1122                 int             rc = LDAP_SUCCESS;
1123                 const char      *dummy = NULL;
1124
1125                 an[i].an_desc = NULL;
1126                 an[i].an_oc = NULL;
1127                 an[i].an_oc_exclude = 0;
1128                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1129                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1130                         rs->sr_text = dummy
1131                                 ? dummy
1132                                 : "postread control: unknown attributeType";
1133                         return rc;
1134                 }
1135         }
1136
1137         op->o_preread = ctrl->ldctl_iscritical
1138                 ? SLAP_CONTROL_CRITICAL
1139                 : SLAP_CONTROL_NONCRITICAL;
1140
1141         op->o_preread_attrs = an;
1142
1143         rs->sr_err = LDAP_SUCCESS;
1144         return LDAP_SUCCESS;
1145 }
1146
1147 static int parsePostRead (
1148         Operation *op,
1149         SlapReply *rs,
1150         LDAPControl *ctrl )
1151 {
1152         ber_len_t siz, off, i;
1153         AttributeName *an = NULL;
1154         BerElement      *ber;
1155
1156         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1157                 rs->sr_text = "postread control specified multiple times";
1158                 return LDAP_PROTOCOL_ERROR;
1159         }
1160
1161         if ( ctrl->ldctl_value.bv_len == 0 ) {
1162                 rs->sr_text = "postread control value is empty (or absent)";
1163                 return LDAP_PROTOCOL_ERROR;
1164         }
1165
1166         ber = ber_init( &(ctrl->ldctl_value) );
1167         if (ber == NULL) {
1168                 rs->sr_text = "postread control: internal error";
1169                 return LDAP_OTHER;
1170         }
1171
1172         siz = sizeof( AttributeName );
1173         off = offsetof( AttributeName, an_name );
1174         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1175                 rs->sr_text = "postread control: decoding error";
1176                 return LDAP_PROTOCOL_ERROR;
1177         }
1178
1179         for( i=0; i<siz; i++ ) {
1180                 int             rc = LDAP_SUCCESS;
1181                 const char      *dummy = NULL;
1182
1183                 an[i].an_desc = NULL;
1184                 an[i].an_oc = NULL;
1185                 an[i].an_oc_exclude = 0;
1186                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1187                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1188                         rs->sr_text = dummy
1189                                 ? dummy
1190                                 : "postread control: unknown attributeType";
1191                         return rc;
1192                 }
1193         }
1194
1195         op->o_postread = ctrl->ldctl_iscritical
1196                 ? SLAP_CONTROL_CRITICAL
1197                 : SLAP_CONTROL_NONCRITICAL;
1198
1199         op->o_postread_attrs = an;
1200
1201         rs->sr_err = LDAP_SUCCESS;
1202         return LDAP_SUCCESS;
1203 }
1204
1205 static int parseValuesReturnFilter (
1206         Operation *op,
1207         SlapReply *rs,
1208         LDAPControl *ctrl )
1209 {
1210         BerElement      *ber;
1211         struct berval   fstr = BER_BVNULL;
1212
1213         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1214                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1215                 return LDAP_PROTOCOL_ERROR;
1216         }
1217
1218         if ( ctrl->ldctl_value.bv_len == 0 ) {
1219                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1220                 return LDAP_PROTOCOL_ERROR;
1221         }
1222
1223         ber = ber_init( &(ctrl->ldctl_value) );
1224         if (ber == NULL) {
1225                 rs->sr_text = "internal error";
1226                 return LDAP_OTHER;
1227         }
1228
1229         rs->sr_err = get_vrFilter( op, ber, (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1230
1231         if( rs->sr_err != LDAP_SUCCESS ) {
1232                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1233                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1234                         send_ldap_disconnect( op, rs );
1235                         rs->sr_err = SLAPD_DISCONNECT;
1236                 } else {
1237                         send_ldap_result( op, rs );
1238                 }
1239                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1240         }
1241 #ifdef LDAP_DEBUG
1242         else {
1243                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1244         }
1245
1246         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1247                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1248         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1249 #endif
1250
1251         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1252                 ? SLAP_CONTROL_CRITICAL
1253                 : SLAP_CONTROL_NONCRITICAL;
1254
1255         rs->sr_err = LDAP_SUCCESS;
1256         return LDAP_SUCCESS;
1257 }
1258
1259 #ifdef LDAP_CONTROL_SUBENTRIES
1260 static int parseSubentries (
1261         Operation *op,
1262         SlapReply *rs,
1263         LDAPControl *ctrl )
1264 {
1265         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1266                 rs->sr_text = "subentries control specified multiple times";
1267                 return LDAP_PROTOCOL_ERROR;
1268         }
1269
1270         /* FIXME: should use BER library */
1271         if( ( ctrl->ldctl_value.bv_len != 3 )
1272                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1273                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1274         {
1275                 rs->sr_text = "subentries control value encoding is bogus";
1276                 return LDAP_PROTOCOL_ERROR;
1277         }
1278
1279         op->o_subentries = ctrl->ldctl_iscritical
1280                 ? SLAP_CONTROL_CRITICAL
1281                 : SLAP_CONTROL_NONCRITICAL;
1282
1283         if (ctrl->ldctl_value.bv_val[2]) {
1284                 set_subentries_visibility( op );
1285         }
1286
1287         return LDAP_SUCCESS;
1288 }
1289 #endif
1290
1291 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1292 static int parsePermissiveModify (
1293         Operation *op,
1294         SlapReply *rs,
1295         LDAPControl *ctrl )
1296 {
1297         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1298                 rs->sr_text = "permissiveModify control specified multiple times";
1299                 return LDAP_PROTOCOL_ERROR;
1300         }
1301
1302         if ( ctrl->ldctl_value.bv_len ) {
1303                 rs->sr_text = "permissiveModify control value not empty";
1304                 return LDAP_PROTOCOL_ERROR;
1305         }
1306
1307         op->o_permissive_modify = ctrl->ldctl_iscritical
1308                 ? SLAP_CONTROL_CRITICAL
1309                 : SLAP_CONTROL_NONCRITICAL;
1310
1311         return LDAP_SUCCESS;
1312 }
1313 #endif
1314
1315 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1316 static int parseDomainScope (
1317         Operation *op,
1318         SlapReply *rs,
1319         LDAPControl *ctrl )
1320 {
1321         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1322                 rs->sr_text = "domainScope control specified multiple times";
1323                 return LDAP_PROTOCOL_ERROR;
1324         }
1325
1326         if ( ctrl->ldctl_value.bv_len ) {
1327                 rs->sr_text = "domainScope control value not empty";
1328                 return LDAP_PROTOCOL_ERROR;
1329         }
1330
1331         op->o_domain_scope = ctrl->ldctl_iscritical
1332                 ? SLAP_CONTROL_CRITICAL
1333                 : SLAP_CONTROL_NONCRITICAL;
1334
1335         return LDAP_SUCCESS;
1336 }
1337 #endif
1338
1339 #ifdef SLAP_CONTROL_X_TREE_DELETE
1340 static int parseTreeDelete (
1341         Operation *op,
1342         SlapReply *rs,
1343         LDAPControl *ctrl )
1344 {
1345         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1346                 rs->sr_text = "treeDelete control specified multiple times";
1347                 return LDAP_PROTOCOL_ERROR;
1348         }
1349
1350         if ( ctrl->ldctl_value.bv_len ) {
1351                 rs->sr_text = "treeDelete control value not empty";
1352                 return LDAP_PROTOCOL_ERROR;
1353         }
1354
1355         op->o_tree_delete = ctrl->ldctl_iscritical
1356                 ? SLAP_CONTROL_CRITICAL
1357                 : SLAP_CONTROL_NONCRITICAL;
1358
1359         return LDAP_SUCCESS;
1360 }
1361 #endif
1362
1363 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
1364 static int parseSearchOptions (
1365         Operation *op,
1366         SlapReply *rs,
1367         LDAPControl *ctrl )
1368 {
1369         BerElement *ber;
1370         ber_int_t search_flags;
1371         ber_tag_t tag;
1372
1373         if ( ctrl->ldctl_value.bv_len == 0 ) {
1374                 rs->sr_text = "searchOptions control value not empty";
1375                 return LDAP_PROTOCOL_ERROR;
1376         }
1377
1378         ber = ber_init( &ctrl->ldctl_value );
1379         if( ber == NULL ) {
1380                 rs->sr_text = "internal error";
1381                 return LDAP_OTHER;
1382         }
1383
1384         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1385                 rs->sr_text = "searchOptions control decoding error";
1386                 return LDAP_PROTOCOL_ERROR;
1387         }
1388
1389         (void) ber_free( ber, 1 );
1390
1391         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1392                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1393                         rs->sr_text = "searchOptions control specified multiple times "
1394                                 "or with domainScope control";
1395                         return LDAP_PROTOCOL_ERROR;
1396                 }
1397
1398                 op->o_domain_scope = ctrl->ldctl_iscritical
1399                         ? SLAP_CONTROL_CRITICAL
1400                         : SLAP_CONTROL_NONCRITICAL;
1401         }
1402
1403         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1404                 /* Other search flags not recognised so far,
1405                  * including:
1406                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1407                  */
1408                 rs->sr_text = "searchOptions contained unrecongized flag";
1409                 return LDAP_UNWILLING_TO_PERFORM;
1410         }
1411
1412         return LDAP_SUCCESS;
1413 }
1414 #endif
1415