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 get_ctrls(
 445         Operation *op,
 446         SlapReply *rs,
 447         int sendres )
 448 {
 449         int nctrls = 0;
 450         ber_tag_t tag;
 451         ber_len_t len;
 452         char *opaque;
 453         BerElement *ber = op->o_ber;
 454         struct slap_control *sc;
 455         struct berval bv;
 456
 457         len = ber_pvt_ber_remaining(ber);
 458
 459         if( len == 0) {
 460                 /* no controls */
 461                 rs->sr_err = LDAP_SUCCESS;
 462                 return rs->sr_err;
 463         }
 464
 465         if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
 466                 if( tag == LBER_ERROR ) {
 467                         rs->sr_err = SLAPD_DISCONNECT;
 468                         rs->sr_text = "unexpected data in PDU";
 469                 }
 470
 471                 goto return_results;
 472         }
 473
 474         Debug( LDAP_DEBUG_TRACE,
 475                 "=> get_ctrls\n", 0, 0, 0 );
 476
 477         if( op->o_protocol < LDAP_VERSION3 ) {
 478                 rs->sr_err = SLAPD_DISCONNECT;
 479                 rs->sr_text = "controls require LDAPv3";
 480                 goto return_results;
 481         }
 482
 483         /* one for first control, one for termination */
 484         op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
 485
 486 #if 0
 487         if( op->ctrls == NULL ) {
 488                 rs->sr_err = LDAP_NO_MEMORY;
 489                 rs->sr_text = "no memory";
 490                 goto return_results;
 491         }
 492 #endif
 493
 494         op->o_ctrls[nctrls] = NULL;
 495
 496         /* step through each element */
 497         for( tag = ber_first_element( ber, &len, &opaque );
 498                 tag != LBER_ERROR;
 499                 tag = ber_next_element( ber, &len, opaque ) )
 500         {
 501                 LDAPControl *c;
 502                 LDAPControl **tctrls;
 503
 504                 c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
 505                 memset(c, 0, sizeof(LDAPControl));
 506
 507                 /* allocate pointer space for current controls (nctrls)
 508                  * + this control + extra NULL
 509                  */
 510                 tctrls = op->o_tmprealloc( op->o_ctrls,
 511                         (nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
 512
 513 #if 0
 514                 if( tctrls == NULL ) {
 515                         ch_free( c );
 516                         ldap_controls_free(op->o_ctrls);
 517                         op->o_ctrls = NULL;
 518
 519                         rs->sr_err = LDAP_NO_MEMORY;
 520                         rs->sr_text = "no memory";
 521                         goto return_results;
 522                 }
 523 #endif
 524                 op->o_ctrls = tctrls;
 525
 526                 op->o_ctrls[nctrls++] = c;
 527                 op->o_ctrls[nctrls] = NULL;
 528
 529                 tag = ber_scanf( ber, "{m" /*}*/, &bv );
 530                 c->ldctl_oid = bv.bv_val;
 531
 532                 if( tag == LBER_ERROR ) {
 533                         Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
 534                                 0, 0, 0 );
 535
 536                         slap_free_ctrls( op, op->o_ctrls );
 537                         op->o_ctrls = NULL;
 538                         rs->sr_err = SLAPD_DISCONNECT;
 539                         rs->sr_text = "decoding controls error";
 540                         goto return_results;
 541
 542                 } else if( c->ldctl_oid == NULL ) {
 543                         Debug( LDAP_DEBUG_TRACE,
 544                                 "get_ctrls: conn %lu got emtpy OID.\n",
 545                                 op->o_connid, 0, 0 );
 546
 547                         slap_free_ctrls( op, op->o_ctrls );
 548                         op->o_ctrls = NULL;
 549                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 550                         rs->sr_text = "OID field is empty";
 551                         goto return_results;
 552                 }
 553
 554                 tag = ber_peek_tag( ber, &len );
 555
 556                 if( tag == LBER_BOOLEAN ) {
 557                         ber_int_t crit;
 558                         tag = ber_scanf( ber, "b", &crit );
 559
 560                         if( tag == LBER_ERROR ) {
 561                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
 562                                         0, 0, 0 );
 563                                 slap_free_ctrls( op, op->o_ctrls );
 564                                 op->o_ctrls = NULL;
 565                                 rs->sr_err = SLAPD_DISCONNECT;
 566                                 rs->sr_text = "decoding controls error";
 567                                 goto return_results;
 568                         }
 569
 570                         c->ldctl_iscritical = (crit != 0);
 571                         tag = ber_peek_tag( ber, &len );
 572                 }
 573
 574                 if( tag == LBER_OCTETSTRING ) {
 575                         tag = ber_scanf( ber, "m", &c->ldctl_value );
 576
 577                         if( tag == LBER_ERROR ) {
 578                                 Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
 579                                         "%s (%scritical): get value failed.\n",
 580                                         op->o_connid, c->ldctl_oid,
 581                                         c->ldctl_iscritical ? "" : "non" );
 582                                 slap_free_ctrls( op, op->o_ctrls );
 583                                 op->o_ctrls = NULL;
 584                                 rs->sr_err = SLAPD_DISCONNECT;
 585                                 rs->sr_text = "decoding controls error";
 586                                 goto return_results;
 587                         }
 588                 }
 589
 590                 Debug( LDAP_DEBUG_TRACE,
 591                         "=> get_ctrls: oid=\"%s\" (%scritical)\n",
 592                         c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
 593
 594                 sc = find_ctrl( c->ldctl_oid );
 595                 if( sc != NULL ) {
 596                         /* recognized control */
 597                         slap_mask_t tagmask;
 598                         switch( op->o_tag ) {
 599                         case LDAP_REQ_ADD:
 600                                 tagmask = SLAP_CTRL_ADD;
 601                                 break;
 602                         case LDAP_REQ_BIND:
 603                                 tagmask = SLAP_CTRL_BIND;
 604                                 break;
 605                         case LDAP_REQ_COMPARE:
 606                                 tagmask = SLAP_CTRL_COMPARE;
 607                                 break;
 608                         case LDAP_REQ_DELETE:
 609                                 tagmask = SLAP_CTRL_DELETE;
 610                                 break;
 611                         case LDAP_REQ_MODIFY:
 612                                 tagmask = SLAP_CTRL_MODIFY;
 613                                 break;
 614                         case LDAP_REQ_RENAME:
 615                                 tagmask = SLAP_CTRL_RENAME;
 616                                 break;
 617                         case LDAP_REQ_SEARCH:
 618                                 tagmask = SLAP_CTRL_SEARCH;
 619                                 break;
 620                         case LDAP_REQ_UNBIND:
 621                                 tagmask = SLAP_CTRL_UNBIND;
 622                                 break;
 623                         case LDAP_REQ_ABANDON:
 624                                 tagmask = SLAP_CTRL_ABANDON;
 625                                 break;
 626                         case LDAP_REQ_EXTENDED:
 627                                 tagmask=~0L;
 628                                 assert( op->ore_reqoid.bv_val != NULL );
 629                                 if( sc->sc_extendedops != NULL ) {
 630                                         int i;
 631                                         for( i=0; sc->sc_extendedops[i] != NULL; i++ ) {
 632                                                 if( strcmp( op->ore_reqoid.bv_val,
 633                                                         sc->sc_extendedops[i] ) == 0 )
 634                                                 {
 635                                                         tagmask=0L;
 636                                                         break;
 637                                                 }
 638                                         }
 639                                 }
 640                                 break;
 641                         default:
 642                                 rs->sr_err = LDAP_OTHER;
 643                                 rs->sr_text = "controls internal error";
 644                                 goto return_results;
 645                         }
 646
 647                         if (( sc->sc_mask & tagmask ) == tagmask ) {
 648                                 /* available extension */
 649                                 int     rc;
 650
 651                                 if( !sc->sc_parse ) {
 652                                         rs->sr_err = LDAP_OTHER;
 653                                         rs->sr_text = "not yet implemented";
 654                                         goto return_results;
 655                                 }
 656
 657                                 rc = sc->sc_parse( op, rs, c );
 658                                 if ( rc ) {
 659                                         assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
 660                                         rs->sr_err = rc;
 661                                         goto return_results;
 662                                 }
 663
 664                         } else if( c->ldctl_iscritical ) {
 665                                 /* unavailable CRITICAL control */
 666                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 667                                 rs->sr_text = "critical extension is unavailable";
 668                                 goto return_results;
 669                         }
 670
 671                 } else if( c->ldctl_iscritical ) {
 672                         /* unrecognized CRITICAL control */
 673                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 674                         rs->sr_text = "critical extension is not recognized";
 675                         goto return_results;
 676                 }
 677         }
 678
 679 return_results:
 680         Debug( LDAP_DEBUG_TRACE,
 681                 "<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
 682                 nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
 683
 684         if( sendres && rs->sr_err != LDAP_SUCCESS ) {
 685                 if( rs->sr_err == SLAPD_DISCONNECT ) {
 686                         rs->sr_err = LDAP_PROTOCOL_ERROR;
 687                         send_ldap_disconnect( op, rs );
 688                         rs->sr_err = SLAPD_DISCONNECT;
 689                 } else {
 690                         send_ldap_result( op, rs );
 691                 }
 692         }
 693
 694         return rs->sr_err;
 695 }
 696
 697 #ifdef LDAP_CONTROL_MODIFY_INCREMENT
 698 static int parseModifyIncrement (
 699         Operation *op,
 700         SlapReply *rs,
 701         LDAPControl *ctrl )
 702 {
 703 #if 0
 704         if ( op->o_modifyIncrement != SLAP_CONTROL_NONE ) {
 705                 rs->sr_text = "modifyIncrement control specified multiple times";
 706                 return LDAP_PROTOCOL_ERROR;
 707         }
 708 #endif
 709
 710         if ( ctrl->ldctl_value.bv_len ) {
 711                 rs->sr_text = "modifyIncrement control value not empty";
 712                 return LDAP_PROTOCOL_ERROR;
 713         }
 714
 715 #if 0
 716         op->o_modifyIncrement = ctrl->ldctl_iscritical
 717                 ? SLAP_CONTROL_CRITICAL
 718                 : SLAP_CONTROL_NONCRITICAL;
 719 #endif
 720
 721         return LDAP_SUCCESS;
 722 }
 723 #endif
 724
 725 #ifdef LDAP_DEVEL
 726 static int parseManageDIT (
 727         Operation *op,
 728         SlapReply *rs,
 729         LDAPControl *ctrl )
 730 {
 731         if ( op->o_managedit != SLAP_CONTROL_NONE ) {
 732                 rs->sr_text = "manageDIT control specified multiple times";
 733                 return LDAP_PROTOCOL_ERROR;
 734         }
 735
 736         if ( ctrl->ldctl_value.bv_len ) {
 737                 rs->sr_text = "manageDIT control value not empty";
 738                 return LDAP_PROTOCOL_ERROR;
 739         }
 740
 741         op->o_managedit = ctrl->ldctl_iscritical
 742                 ? SLAP_CONTROL_CRITICAL
 743                 : SLAP_CONTROL_NONCRITICAL;
 744
 745         return LDAP_SUCCESS;
 746 }
 747 #endif
 748
 749 static int parseManageDSAit (
 750         Operation *op,
 751         SlapReply *rs,
 752         LDAPControl *ctrl )
 753 {
 754         if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
 755                 rs->sr_text = "manageDSAit control specified multiple times";
 756                 return LDAP_PROTOCOL_ERROR;
 757         }
 758
 759         if ( ctrl->ldctl_value.bv_len ) {
 760                 rs->sr_text = "manageDSAit control value not empty";
 761                 return LDAP_PROTOCOL_ERROR;
 762         }
 763
 764         op->o_managedsait = ctrl->ldctl_iscritical
 765                 ? SLAP_CONTROL_CRITICAL
 766                 : SLAP_CONTROL_NONCRITICAL;
 767
 768         return LDAP_SUCCESS;
 769 }
 770
 771 static int parseProxyAuthz (
 772         Operation *op,
 773         SlapReply *rs,
 774         LDAPControl *ctrl )
 775 {
 776         int             rc;
 777         struct berval   dn = BER_BVNULL;
 778
 779         if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
 780                 rs->sr_text = "proxy authorization control specified multiple times";
 781                 return LDAP_PROTOCOL_ERROR;
 782         }
 783
 784         op->o_proxy_authz = ctrl->ldctl_iscritical
 785                 ? SLAP_CONTROL_CRITICAL
 786                 : SLAP_CONTROL_NONCRITICAL;
 787
 788         Debug( LDAP_DEBUG_ARGS,
 789                 "parseProxyAuthz: conn %lu authzid=\"%s\"\n",
 790                 op->o_connid,
 791                 ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
 792                 0 );
 793
 794         if ( ctrl->ldctl_value.bv_len == 0 ) {
 795                 Debug( LDAP_DEBUG_TRACE,
 796                         "parseProxyAuthz: conn=%lu anonymous\n",
 797                         op->o_connid, 0, 0 );
 798
 799                 /* anonymous */
 800                 op->o_ndn.bv_val[ 0 ] = '\0';
 801                 op->o_ndn.bv_len = 0;
 802
 803                 op->o_dn.bv_val[ 0 ] = '\0';
 804                 op->o_dn.bv_len = 0;
 805
 806                 return LDAP_SUCCESS;
 807         }
 808
 809         rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
 810                         NULL, &dn, SLAP_GETDN_AUTHZID );
 811
 812         /* FIXME: empty DN in proxyAuthz control should be legal... */
 813         if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
 814                 if ( dn.bv_val ) {
 815                         ch_free( dn.bv_val );
 816                 }
 817                 rs->sr_text = "authzId mapping failed";
 818                 return LDAP_PROXY_AUTHZ_FAILURE;
 819         }
 820
 821         Debug( LDAP_DEBUG_TRACE,
 822                 "parseProxyAuthz: conn=%lu \"%s\"\n",
 823                 op->o_connid,
 824                 dn.bv_len ? dn.bv_val : "(NULL)", 0 );
 825
 826         rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
 827
 828         if ( rc ) {
 829                 ch_free( dn.bv_val );
 830                 rs->sr_text = "not authorized to assume identity";
 831                 return LDAP_PROXY_AUTHZ_FAILURE;
 832         }
 833
 834         ch_free( op->o_ndn.bv_val );
 835         ch_free( op->o_dn.bv_val );
 836
 837         /*
 838          * NOTE: since slap_sasl_getdn() returns a normalized dn,
 839          * from now on op->o_dn is normalized
 840          */
 841         op->o_ndn = dn;
 842         ber_dupbv( &op->o_dn, &dn );
 843
 844
 845         Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
 846             op->o_log_prefix, dn.bv_val, 0, 0, 0 );
 847
 848         return LDAP_SUCCESS;
 849 }
 850
 851 static int parseNoOp (
 852         Operation *op,
 853         SlapReply *rs,
 854         LDAPControl *ctrl )
 855 {
 856         if ( op->o_noop != SLAP_CONTROL_NONE ) {
 857                 rs->sr_text = "noop control specified multiple times";
 858                 return LDAP_PROTOCOL_ERROR;
 859         }
 860
 861         if ( ctrl->ldctl_value.bv_len ) {
 862                 rs->sr_text = "noop control value not empty";
 863                 return LDAP_PROTOCOL_ERROR;
 864         }
 865
 866         op->o_noop = ctrl->ldctl_iscritical
 867                 ? SLAP_CONTROL_CRITICAL
 868                 : SLAP_CONTROL_NONCRITICAL;
 869
 870         return LDAP_SUCCESS;
 871 }
 872
 873 static int parsePagedResults (
 874         Operation *op,
 875         SlapReply *rs,
 876         LDAPControl *ctrl )
 877 {
 878         int             rc = LDAP_SUCCESS;
 879         ber_tag_t       tag;
 880         ber_int_t       size;
 881         BerElement      *ber;
 882         struct berval   cookie = BER_BVNULL;
 883         PagedResultsState       *ps;
 884
 885         if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
 886                 rs->sr_text = "paged results control specified multiple times";
 887                 return LDAP_PROTOCOL_ERROR;
 888         }
 889
 890         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
 891                 rs->sr_text = "paged results control value is empty (or absent)";
 892                 return LDAP_PROTOCOL_ERROR;
 893         }
 894
 895         /* Parse the control value
 896          *      realSearchControlValue ::= SEQUENCE {
 897          *              size    INTEGER (0..maxInt),
 898          *                              -- requested page size from client
 899          *                              -- result set size estimate from server
 900          *              cookie  OCTET STRING
 901          * }
 902          */
 903         ber = ber_init( &ctrl->ldctl_value );
 904         if ( ber == NULL ) {
 905                 rs->sr_text = "internal error";
 906                 return LDAP_OTHER;
 907         }
 908
 909         tag = ber_scanf( ber, "{im}", &size, &cookie );
 910
 911         if ( tag == LBER_ERROR ) {
 912                 rs->sr_text = "paged results control could not be decoded";
 913                 rc = LDAP_PROTOCOL_ERROR;
 914                 goto done;
 915         }
 916
 917         if ( size < 0 ) {
 918                 rs->sr_text = "paged results control size invalid";
 919                 rc = LDAP_PROTOCOL_ERROR;
 920                 goto done;
 921         }
 922
 923 #if 0
 924         /* defer cookie decoding/checks to backend... */
 925         if ( cookie.bv_len ) {
 926                 PagedResultsCookie reqcookie;
 927                 if( cookie.bv_len != sizeof( reqcookie ) ) {
 928                         /* bad cookie */
 929                         rs->sr_text = "paged results cookie is invalid";
 930                         rc = LDAP_PROTOCOL_ERROR;
 931                         goto done;
 932                 }
 933
 934                 AC_MEMCPY( &reqcookie, cookie.bv_val, sizeof( reqcookie ));
 935
 936                 if ( reqcookie > op->o_pagedresults_state.ps_cookie ) {
 937                         /* bad cookie */
 938                         rs->sr_text = "paged results cookie is invalid";
 939                         rc = LDAP_PROTOCOL_ERROR;
 940                         goto done;
 941
 942                 } else if ( reqcookie < op->o_pagedresults_state.ps_cookie ) {
 943                         rs->sr_text = "paged results cookie is invalid or old";
 944                         rc = LDAP_UNWILLING_TO_PERFORM;
 945                         goto done;
 946                 }
 947
 948         } else {
 949                 /* Initial request.  Initialize state. */
 950 #if 0
 951                 if ( op->o_conn->c_pagedresults_state.ps_cookie != 0 ) {
 952                         /* There's another pagedResults control on the
 953                          * same connection; reject new pagedResults controls
 954                          * (allowed by RFC2696) */
 955                         rs->sr_text = "paged results cookie unavailable; try later";
 956                         rc = LDAP_UNWILLING_TO_PERFORM;
 957                         goto done;
 958                 }
 959 #endif
 960                 op->o_pagedresults_state.ps_cookie = 0;
 961                 op->o_pagedresults_state.ps_count = 0;
 962         }
 963 #endif
 964
 965         ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
 966         *ps = op->o_conn->c_pagedresults_state;
 967         ps->ps_size = size;
 968         op->o_pagedresults_state = ps;
 969
 970         /* NOTE: according to RFC 2696 3.:
 971
 972     If the page size is greater than or equal to the sizeLimit value, the
 973     server should ignore the control as the request can be satisfied in a
 974     single page.
 975
 976          * NOTE: this assumes that the op->ors_slimit be set
 977          * before the controls are parsed.
 978          */
 979
 980         if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
 981                 op->o_pagedresults = SLAP_CONTROL_IGNORED;
 982
 983         } else if ( ctrl->ldctl_iscritical ) {
 984                 op->o_pagedresults = SLAP_CONTROL_CRITICAL;
 985
 986         } else {
 987                 op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
 988         }
 989
 990 done:;
 991         (void)ber_free( ber, 1 );
 992         return rc;
 993 }
 994
 995 #ifdef LDAP_DEVEL
 996 static int parseSortedResults (
 997         Operation *op,
 998         SlapReply *rs,
 999         LDAPControl *ctrl )
1000 {
1001         int             rc = LDAP_SUCCESS;
1002
1003         if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
1004                 rs->sr_text = "sorted results control specified multiple times";
1005                 return LDAP_PROTOCOL_ERROR;
1006         }
1007
1008         if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
1009                 rs->sr_text = "sorted results control value is empty (or absent)";
1010                 return LDAP_PROTOCOL_ERROR;
1011         }
1012
1013         /* blow off parsing the value */
1014
1015         op->o_sortedresults = ctrl->ldctl_iscritical
1016                 ? SLAP_CONTROL_CRITICAL
1017                 : SLAP_CONTROL_NONCRITICAL;
1018
1019         return rc;
1020 }
1021 #endif
1022
1023 static int parseAssert (
1024         Operation *op,
1025         SlapReply *rs,
1026         LDAPControl *ctrl )
1027 {
1028         BerElement      *ber;
1029         struct berval   fstr = BER_BVNULL;
1030
1031         if ( op->o_assert != SLAP_CONTROL_NONE ) {
1032                 rs->sr_text = "assert control specified multiple times";
1033                 return LDAP_PROTOCOL_ERROR;
1034         }
1035
1036         if ( ctrl->ldctl_value.bv_len == 0 ) {
1037                 rs->sr_text = "assert control value is empty (or absent)";
1038                 return LDAP_PROTOCOL_ERROR;
1039         }
1040
1041         ber = ber_init( &(ctrl->ldctl_value) );
1042         if (ber == NULL) {
1043                 rs->sr_text = "assert control: internal error";
1044                 return LDAP_OTHER;
1045         }
1046
1047         rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion), &rs->sr_text);
1048
1049         if( rs->sr_err != LDAP_SUCCESS ) {
1050                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1051                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1052                         send_ldap_disconnect( op, rs );
1053                         rs->sr_err = SLAPD_DISCONNECT;
1054                 } else {
1055                         send_ldap_result( op, rs );
1056                 }
1057                 if( op->o_assertion != NULL ) {
1058                         filter_free_x( op, op->o_assertion );
1059                 }
1060                 return rs->sr_err;
1061         }
1062
1063 #ifdef LDAP_DEBUG
1064         filter2bv_x( op, op->o_assertion, &fstr );
1065
1066         Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
1067                 op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
1068         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1069 #endif
1070
1071         op->o_assert = ctrl->ldctl_iscritical
1072                 ? SLAP_CONTROL_CRITICAL
1073                 : SLAP_CONTROL_NONCRITICAL;
1074
1075         rs->sr_err = LDAP_SUCCESS;
1076         return LDAP_SUCCESS;
1077 }
1078
1079 static int parsePreRead (
1080         Operation *op,
1081         SlapReply *rs,
1082         LDAPControl *ctrl )
1083 {
1084         ber_len_t siz, off, i;
1085         AttributeName *an = NULL;
1086         BerElement      *ber;
1087
1088         if ( op->o_preread != SLAP_CONTROL_NONE ) {
1089                 rs->sr_text = "preread control specified multiple times";
1090                 return LDAP_PROTOCOL_ERROR;
1091         }
1092
1093         if ( ctrl->ldctl_value.bv_len == 0 ) {
1094                 rs->sr_text = "preread control value is empty (or absent)";
1095                 return LDAP_PROTOCOL_ERROR;
1096         }
1097
1098         ber = ber_init( &(ctrl->ldctl_value) );
1099         if (ber == NULL) {
1100                 rs->sr_text = "preread control: internal error";
1101                 return LDAP_OTHER;
1102         }
1103
1104         siz = sizeof( AttributeName );
1105         off = offsetof( AttributeName, an_name );
1106         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1107                 rs->sr_text = "preread control: decoding error";
1108                 return LDAP_PROTOCOL_ERROR;
1109         }
1110
1111         for( i=0; i<siz; i++ ) {
1112                 int             rc = LDAP_SUCCESS;
1113                 const char      *dummy = NULL;
1114
1115                 an[i].an_desc = NULL;
1116                 an[i].an_oc = NULL;
1117                 an[i].an_oc_exclude = 0;
1118                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1119                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1120                         rs->sr_text = dummy
1121                                 ? dummy
1122                                 : "postread control: unknown attributeType";
1123                         return rc;
1124                 }
1125         }
1126
1127         op->o_preread = ctrl->ldctl_iscritical
1128                 ? SLAP_CONTROL_CRITICAL
1129                 : SLAP_CONTROL_NONCRITICAL;
1130
1131         op->o_preread_attrs = an;
1132
1133         rs->sr_err = LDAP_SUCCESS;
1134         return LDAP_SUCCESS;
1135 }
1136
1137 static int parsePostRead (
1138         Operation *op,
1139         SlapReply *rs,
1140         LDAPControl *ctrl )
1141 {
1142         ber_len_t siz, off, i;
1143         AttributeName *an = NULL;
1144         BerElement      *ber;
1145
1146         if ( op->o_postread != SLAP_CONTROL_NONE ) {
1147                 rs->sr_text = "postread control specified multiple times";
1148                 return LDAP_PROTOCOL_ERROR;
1149         }
1150
1151         if ( ctrl->ldctl_value.bv_len == 0 ) {
1152                 rs->sr_text = "postread control value is empty (or absent)";
1153                 return LDAP_PROTOCOL_ERROR;
1154         }
1155
1156         ber = ber_init( &(ctrl->ldctl_value) );
1157         if (ber == NULL) {
1158                 rs->sr_text = "postread control: internal error";
1159                 return LDAP_OTHER;
1160         }
1161
1162         siz = sizeof( AttributeName );
1163         off = offsetof( AttributeName, an_name );
1164         if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
1165                 rs->sr_text = "postread control: decoding error";
1166                 return LDAP_PROTOCOL_ERROR;
1167         }
1168
1169         for( i=0; i<siz; i++ ) {
1170                 int             rc = LDAP_SUCCESS;
1171                 const char      *dummy = NULL;
1172
1173                 an[i].an_desc = NULL;
1174                 an[i].an_oc = NULL;
1175                 an[i].an_oc_exclude = 0;
1176                 rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
1177                 if ( rc != LDAP_SUCCESS && ctrl->ldctl_iscritical ) {
1178                         rs->sr_text = dummy
1179                                 ? dummy
1180                                 : "postread control: unknown attributeType";
1181                         return rc;
1182                 }
1183         }
1184
1185         op->o_postread = ctrl->ldctl_iscritical
1186                 ? SLAP_CONTROL_CRITICAL
1187                 : SLAP_CONTROL_NONCRITICAL;
1188
1189         op->o_postread_attrs = an;
1190
1191         rs->sr_err = LDAP_SUCCESS;
1192         return LDAP_SUCCESS;
1193 }
1194
1195 int parseValuesReturnFilter (
1196         Operation *op,
1197         SlapReply *rs,
1198         LDAPControl *ctrl )
1199 {
1200         BerElement      *ber;
1201         struct berval   fstr = BER_BVNULL;
1202
1203         if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
1204                 rs->sr_text = "valuesReturnFilter control specified multiple times";
1205                 return LDAP_PROTOCOL_ERROR;
1206         }
1207
1208         if ( ctrl->ldctl_value.bv_len == 0 ) {
1209                 rs->sr_text = "valuesReturnFilter control value is empty (or absent)";
1210                 return LDAP_PROTOCOL_ERROR;
1211         }
1212
1213         ber = ber_init( &(ctrl->ldctl_value) );
1214         if (ber == NULL) {
1215                 rs->sr_text = "internal error";
1216                 return LDAP_OTHER;
1217         }
1218
1219         rs->sr_err = get_vrFilter( op, ber, (ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
1220
1221         if( rs->sr_err != LDAP_SUCCESS ) {
1222                 if( rs->sr_err == SLAPD_DISCONNECT ) {
1223                         rs->sr_err = LDAP_PROTOCOL_ERROR;
1224                         send_ldap_disconnect( op, rs );
1225                         rs->sr_err = SLAPD_DISCONNECT;
1226                 } else {
1227                         send_ldap_result( op, rs );
1228                 }
1229                 if( op->o_vrFilter != NULL) vrFilter_free( op, op->o_vrFilter );
1230         }
1231 #ifdef LDAP_DEBUG
1232         else {
1233                 vrFilter2bv( op, op->o_vrFilter, &fstr );
1234         }
1235
1236         Debug( LDAP_DEBUG_ARGS, "       vrFilter: %s\n",
1237                 fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
1238         op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
1239 #endif
1240
1241         op->o_valuesreturnfilter = ctrl->ldctl_iscritical
1242                 ? SLAP_CONTROL_CRITICAL
1243                 : SLAP_CONTROL_NONCRITICAL;
1244
1245         rs->sr_err = LDAP_SUCCESS;
1246         return LDAP_SUCCESS;
1247 }
1248
1249 #ifdef LDAP_CONTROL_SUBENTRIES
1250 static int parseSubentries (
1251         Operation *op,
1252         SlapReply *rs,
1253         LDAPControl *ctrl )
1254 {
1255         if ( op->o_subentries != SLAP_CONTROL_NONE ) {
1256                 rs->sr_text = "subentries control specified multiple times";
1257                 return LDAP_PROTOCOL_ERROR;
1258         }
1259
1260         /* FIXME: should use BER library */
1261         if( ( ctrl->ldctl_value.bv_len != 3 )
1262                 || ( ctrl->ldctl_value.bv_val[0] != 0x01 )
1263                 || ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
1264         {
1265                 rs->sr_text = "subentries control value encoding is bogus";
1266                 return LDAP_PROTOCOL_ERROR;
1267         }
1268
1269         op->o_subentries = ctrl->ldctl_iscritical
1270                 ? SLAP_CONTROL_CRITICAL
1271                 : SLAP_CONTROL_NONCRITICAL;
1272
1273         if (ctrl->ldctl_value.bv_val[2]) {
1274                 set_subentries_visibility( op );
1275         }
1276
1277         return LDAP_SUCCESS;
1278 }
1279 #endif
1280
1281 #ifdef LDAP_CONTROL_X_PERMISSIVE_MODIFY
1282 static int parsePermissiveModify (
1283         Operation *op,
1284         SlapReply *rs,
1285         LDAPControl *ctrl )
1286 {
1287         if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
1288                 rs->sr_text = "permissiveModify control specified multiple times";
1289                 return LDAP_PROTOCOL_ERROR;
1290         }
1291
1292         if ( ctrl->ldctl_value.bv_len ) {
1293                 rs->sr_text = "permissiveModify control value not empty";
1294                 return LDAP_PROTOCOL_ERROR;
1295         }
1296
1297         op->o_permissive_modify = ctrl->ldctl_iscritical
1298                 ? SLAP_CONTROL_CRITICAL
1299                 : SLAP_CONTROL_NONCRITICAL;
1300
1301         return LDAP_SUCCESS;
1302 }
1303 #endif
1304
1305 #ifdef LDAP_CONTROL_X_DOMAIN_SCOPE
1306 static int parseDomainScope (
1307         Operation *op,
1308         SlapReply *rs,
1309         LDAPControl *ctrl )
1310 {
1311         if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1312                 rs->sr_text = "domainScope control specified multiple times";
1313                 return LDAP_PROTOCOL_ERROR;
1314         }
1315
1316         if ( ctrl->ldctl_value.bv_len ) {
1317                 rs->sr_text = "domainScope control value not empty";
1318                 return LDAP_PROTOCOL_ERROR;
1319         }
1320
1321         op->o_domain_scope = ctrl->ldctl_iscritical
1322                 ? SLAP_CONTROL_CRITICAL
1323                 : SLAP_CONTROL_NONCRITICAL;
1324
1325         return LDAP_SUCCESS;
1326 }
1327 #endif
1328
1329 #ifdef SLAP_CONTROL_X_TREE_DELETE
1330 static int parseTreeDelete (
1331         Operation *op,
1332         SlapReply *rs,
1333         LDAPControl *ctrl )
1334 {
1335         if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
1336                 rs->sr_text = "treeDelete control specified multiple times";
1337                 return LDAP_PROTOCOL_ERROR;
1338         }
1339
1340         if ( ctrl->ldctl_value.bv_len ) {
1341                 rs->sr_text = "treeDelete control value not empty";
1342                 return LDAP_PROTOCOL_ERROR;
1343         }
1344
1345         op->o_tree_delete = ctrl->ldctl_iscritical
1346                 ? SLAP_CONTROL_CRITICAL
1347                 : SLAP_CONTROL_NONCRITICAL;
1348
1349         return LDAP_SUCCESS;
1350 }
1351 #endif
1352
1353 #ifdef LDAP_CONTROL_X_SEARCH_OPTIONS
1354 static int parseSearchOptions (
1355         Operation *op,
1356         SlapReply *rs,
1357         LDAPControl *ctrl )
1358 {
1359         BerElement *ber;
1360         ber_int_t search_flags;
1361         ber_tag_t tag;
1362
1363         if ( ctrl->ldctl_value.bv_len == 0 ) {
1364                 rs->sr_text = "searchOptions control value not empty";
1365                 return LDAP_PROTOCOL_ERROR;
1366         }
1367
1368         ber = ber_init( &ctrl->ldctl_value );
1369         if( ber == NULL ) {
1370                 rs->sr_text = "internal error";
1371                 return LDAP_OTHER;
1372         }
1373
1374         if ( (tag = ber_scanf( ber, "{i}", &search_flags )) == LBER_ERROR ) {
1375                 rs->sr_text = "searchOptions control decoding error";
1376                 return LDAP_PROTOCOL_ERROR;
1377         }
1378
1379         (void) ber_free( ber, 1 );
1380
1381         if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
1382                 if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
1383                         rs->sr_text = "searchOptions control specified multiple times "
1384                                 "or with domainScope control";
1385                         return LDAP_PROTOCOL_ERROR;
1386                 }
1387
1388                 op->o_domain_scope = ctrl->ldctl_iscritical
1389                         ? SLAP_CONTROL_CRITICAL
1390                         : SLAP_CONTROL_NONCRITICAL;
1391         }
1392
1393         if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
1394                 /* Other search flags not recognised so far,
1395                  * including:
1396                  *              LDAP_SEARCH_FLAG_PHANTOM_ROOM
1397                  */
1398                 rs->sr_text = "searchOptions contained unrecongized flag";
1399                 return LDAP_UNWILLING_TO_PERFORM;
1400         }
1401
1402         return LDAP_SUCCESS;
1403 }
1404 #endif
1405